EP0453623B1 - Commande de lame pour machines de pliage - Google Patents

Commande de lame pour machines de pliage Download PDF

Info

Publication number
EP0453623B1
EP0453623B1 EP90111467A EP90111467A EP0453623B1 EP 0453623 B1 EP0453623 B1 EP 0453623B1 EP 90111467 A EP90111467 A EP 90111467A EP 90111467 A EP90111467 A EP 90111467A EP 0453623 B1 EP0453623 B1 EP 0453623B1
Authority
EP
European Patent Office
Prior art keywords
sword
tooth
sensor
teeth
blade
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
EP90111467A
Other languages
German (de)
English (en)
Other versions
EP0453623A1 (fr
Inventor
Werner Reim
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.)
MBO Postpress Solutions GmbH
Original Assignee
Maschinenbau Oppenweiler Binder GmbH and Co KG
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 Maschinenbau Oppenweiler Binder GmbH and Co KG filed Critical Maschinenbau Oppenweiler Binder GmbH and Co KG
Publication of EP0453623A1 publication Critical patent/EP0453623A1/fr
Application granted granted Critical
Publication of EP0453623B1 publication Critical patent/EP0453623B1/fr
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
    • B65H45/00—Folding thin material
    • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
    • B65H45/18—Oscillating or reciprocating blade folders

Definitions

  • the invention relates to a sword control for folding machines with a crank drive which drives the sword and a sensor which detects the top dead center of the crank drive, the sword being stopped in the region of top dead center.
  • a sword control is known from DE-A-2504489.
  • the aim is to stop the sword at top dead center so that the paper has enough space to be able to run under the folding sword.
  • a symmetrically constructed cam to the crankshaft, which stops the sword drive via the sensor in top dead center.
  • This cam must be designed so long in the direction of rotation that, at the highest machine speed, the switching point is chosen so early that the sword comes to a standstill in the upper dead position. It is accepted that the top dead center is overrun more or less depending on the machine speed.
  • the sword is stopped so early that the paper may no longer be able to enter the folding sword unhindered, or the path of the sword must be chosen to be particularly large. If the cam overflows the sensor, this means a machine fault.
  • the starting condition for switching on the sword drive again is that the sword is in the top dead center position and the sensor is damped accordingly by the cam. To ensure that this position is always reached, the clutch and brake must be set very precisely. If, however, the behavior of the clutch and brake changes after only slight wear of the friction linings, an adjustment is essential.
  • the distance from sheet to sheet should be as short as possible, whereby the minimum sheet spacing depends on the position of the bar in relation to the transport plane of the sheet to be folded.
  • the sheet spacing is set by manual optimization, i.e. by shortening the bow spacing until the bow just runs undisturbed under the sword.
  • this is difficult and time-consuming since the movement sequences between the bow and the folding sword and their mutual association cannot be recorded with sufficient accuracy with the human eye.
  • the sheet spacing is often set larger than is absolutely necessary.
  • the invention has for its object to provide a sword control for folding machines to achieve the highest possible machine performance, in which on the one hand the folding sword regardless of the machine speed and regardless of small changes in the state of the clutch and brake exactly at top dead center can be stopped and on the other hand it is possible is to determine the optimal arc distance and set it automatically.
  • a toothed disk which rotates synchronously with the crankshaft of the crank drive and has a plurality of teeth which can be recognized by an evaluation electronics and of which at least one tooth can be distinguished from the other teeth by the evaluation electronics and of which preferably the last one in the direction of rotation is opposite the sensor in the top dead center position of the sword.
  • toothed washer instead of a toothed washer and an associated electromagnetic sensor, another, e.g. Light sensors are used, in which case the toothed disc is to be replaced by a disc on which markings are applied at intervals from one another.
  • toothed disk With the help of the toothed disk according to the invention, it is possible to trigger the switching process depending on the machine speed and depending on the state of the brake and clutch unit, starting with the first tooth in the direction of rotation, more or less early before reaching top dead center, so that the sword always comes to a standstill exactly at top dead center.
  • the teeth of the toothed disk are arranged symmetrically to the tooth corresponding to the top dead center position of the sword. Accordingly, the "last" tooth is the central tooth that determines the axis of symmetry.
  • the evaluation electronics can recognize which tooth is located under the sensor, this and in particular the last tooth or the central tooth that determines the axis of symmetry can be designed with different heights and / or widths, so that depending on the tooth that passes under the sensor, more or less high or wide output signals are generated. This is particularly easy when using a photoelectric sensor if different types of markings are applied to the pane. It is also conceivable to place the teeth or markings on the disk at different distances in the direction of rotation or in different widths in the direction of rotation.
  • the simplest way is to arrange the teeth over a sector of the toothed disk, both with regard to the design of the toothed disk and the evaluation electronics, and to design the rest of the toothed disk with a uniform diameter at the level of the tooth base or the tooth head, or to cut off the rest of the toothed disk entirely .
  • the toothed disk according to the invention and the sensor according to the invention it is possible to determine the shortest possible and thus the optimal arc distance in the course of the machine and to set it automatically.
  • the position of the sword relative to the paper transport plane can be measured.
  • the distance from sheet to sheet can now be calculated automatically and the sheet can be fed "foresighted" to the sword folding unit.
  • the shortening of the arc due to the parallel folds must be included in the calculation.
  • the sword drive contains a motor 11, on the shaft of which a clutch and brake unit 12 is attached.
  • a crankshaft 13 On the driven part of the clutch and brake unit 12 there is a crankshaft 13, the pin 14 of which can be rotated in the sword 15 or its straight guide and can be moved laterally (perpendicular to the plane of the drawing).
  • the sword 15 itself is guided in guides 16, 17.
  • a sheet of paper 18 On the folding table arranged below the sword there is a sheet of paper 18 which, after the sword 15 has been introduced into the folding gap, is gripped and removed by the folding rollers 19 and 20.
  • the toothed disc 21 is covered over a portion of its circumference with teeth 0, 1, 2, 3, 4 and 1 ', 2', 3 ', 4', the tooth 0 in the sense of the definition given at the beginning last "tooth represents.
  • the lower part of the toothed disk 21 is cut off.
  • the toothed disc runs during operation, e.g. counterclockwise, there is initially a pause in the area of the section during which the sensor 22 emits no pulses. If the first tooth 4 runs in the direction of rotation under the sensor 22, then the sensor 22 emits the first pulse. The fifth impulse then corresponds exactly to the top dead center of the sword at which the sword is to be stopped. If the toothed disk 21 now rotates slowly with the crankshaft 13, the braking process can be initiated relatively late, for example if the tooth 1 is below the sensor 22. At higher engine speeds or after some wear of the clutch and brake unit 12, the control electronics initiate the braking process earlier, for example when tooth 2 or 3 is located below the sensor 22.

Landscapes

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

Claims (5)

  1. Commande à lame pour des machines de pliage avec une commande à manivelle (13, 14) entraînant la lame (15) et un capteur (22) détectant le point mort supérieur de la commande à manivelle (13, 14), la lame (15) étant arrêtée au voisinage du point mort supérieur, caractérisée par un disque denté (21) tournant de façon synchrone avec l'arbre de manivelle (13) de la commande à manivelle avec plusieurs dents (4, 3, 2, 1, 0) qui peuvent être reconnues par une électronique d'évaluation et dont au moins une dent peut être distinguée par l'électronique d'évaluation des autres dents.
  2. Commande à lame selon la revendication 1, caractérisée en ce que la dernière dent (0) dans le sens de rotation est opposée dans la position de point mort supérieur de la lame (15) au capteur (22).
  3. Commande à lame selon la revendication 1 ou 2, caractérisée en ce que le disque denté (21) est fixé sur l'arbre (13) de la commande à manivelle (13, 14).
  4. Commande à lame selon l'une des revendications précédentes, caractérisée en ce que les dents (4, 3, 2, 1, 0, 1', 2', 3' ,4') du disque denté (21) sont disposées symétriquement à la dent (0) correspondant à la position de point mort supérieur de la lame (15).
  5. Commande à lame selon l'une des revendications précédentes, caractérisée en ce que les dents (4, 3, 2, 1, 0, 1', 2', 3', 4') sont disposées selon une répartition sur un secteur du disque denté (21).
EP90111467A 1990-04-25 1990-06-18 Commande de lame pour machines de pliage Expired - Lifetime EP0453623B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4013183A DE4013183A1 (de) 1990-04-25 1990-04-25 Schwertsteuerung fuer falzmaschinen
DE4013183 1990-04-25

Publications (2)

Publication Number Publication Date
EP0453623A1 EP0453623A1 (fr) 1991-10-30
EP0453623B1 true EP0453623B1 (fr) 1994-10-26

Family

ID=6405060

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90111467A Expired - Lifetime EP0453623B1 (fr) 1990-04-25 1990-06-18 Commande de lame pour machines de pliage

Country Status (2)

Country Link
EP (1) EP0453623B1 (fr)
DE (2) DE4013183A1 (fr)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1952053U (de) * 1965-02-04 1966-12-22 Stahl & Co O H G Maschinenfabr Schwertfalzwerk.
DE2504489C2 (de) * 1975-02-04 1984-03-22 Maschinenbau Oppenweiler Binder & Co, 7155 Oppenweiler Schwertfalzwerk
DE3027343C2 (de) * 1980-07-18 1983-07-28 Maschinenbau Oppenweiler Binder GmbH & Co, 7155 Oppenweiler Schwertantrieb für Falzmaschinen

Also Published As

Publication number Publication date
DE59007570D1 (de) 1994-12-01
DE4013183A1 (de) 1991-10-31
EP0453623A1 (fr) 1991-10-30

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