EP0557198A1 - Method and apparatus to detect the contact position of two parts where at least one part is mobile - Google Patents

Method and apparatus to detect the contact position of two parts where at least one part is mobile Download PDF

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Publication number
EP0557198A1
EP0557198A1 EP93400420A EP93400420A EP0557198A1 EP 0557198 A1 EP0557198 A1 EP 0557198A1 EP 93400420 A EP93400420 A EP 93400420A EP 93400420 A EP93400420 A EP 93400420A EP 0557198 A1 EP0557198 A1 EP 0557198A1
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EP
European Patent Office
Prior art keywords
cylinder
contact
cylinders
parts
receiving
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Granted
Application number
EP93400420A
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German (de)
French (fr)
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EP0557198B1 (en
Inventor
Bernard Six
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Komori Chambon SA
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Komori Chambon SA
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F33/00—Indicating, counting, warning, control or safety devices
    • B41F33/0072—Devices for measuring the pressure between cylinders or bearer rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
    • B41F—PRINTING MACHINES OR PRESSES
    • B41F13/00—Common details of rotary presses or machines
    • B41F13/08—Cylinders
    • B41F13/24—Cylinder-tripping devices; Cylinder-impression adjustments
    • B41F13/34—Cylinder lifting or adjusting devices

Definitions

  • the present invention relates to a method and a device for detecting, in a machine, the position of coming into contact of two parts, at least one of which is movable, as a whole, relative to the other, a first of these parts or driving part which can be set in motion while the second part or receiving part is mounted idly on its support, applicable more particularly but not exclusively to parallel cylinders of a rotary printer.
  • a sheet of material to be printed travels at constant speed between two parallel cylinders, tangent to each other, namely a blanket cylinder and a counterpart cylinder.
  • the counter cylinder is made of a material which may be hard or flexible, while the surface layer which constitutes the blanket proper, is made of flexible material.
  • the two cylinders are applied under pressure against each other so that the layer of flexible material of the blanket cylinder is crushed in its zone of contact with the counterpart cylinder, the importance of this crushing depending on the pressure exerted by the counter cylinder on the blanket cylinder.
  • this reference position or "zero" position has been determined empirically, for each ply thickness, by the machine operator. To do this, the operator rotates the blanket cylinder, then moved away from the counter cylinder, and engages between the two cylinders a piece of the tablecloth to be printed or of a material having the same thickness, then it brings the counter cylinder closer to the cylinder. blanket, until contact is established. The instant of this simple contact, without pressure, is determined at the moment when the piece of ply which is then itself in contact with the peripheral surfaces of the two cylinders, is driven as a result of its pinching between the two cylinders. It then suffices for the operator to locate this "zero" position and to take it as a starting base for the subsequent pressure setting, resulting in the predetermined crushing of the peripheral layer of the blanket cylinder.
  • the present invention aims to remedy this drawback by providing a device for automatically detecting this "zero" position.
  • this method of detecting, in a machine, the contact position of two parts, at least one of which is movable, as a whole, relative to the other, a first of these parts or driving part being able to be set in motion while the second part or receiving part is mounted loosely on its support is characterized in that the driving part is set in motion while leaving the receiving part immobile, a relative movement of the two driving and receiving parts is carried out until they come into contact, the beginning of the movement of the receiving part, initially stationary, which results from its coming into contact with the moving driving part, is noted, and the positions occupied by the two driving and receiving parts are then recorded, at the moment when the previously immobile receiving part begins to be set in motion, as defining the contact position of the two parts.
  • the invention also relates to a device for implementing the above-mentioned detection method, this device being characterized in that it comprises a movement detection device associated with the receiving part mounted idle, this device comprising a sensor for movement emitting a signal at the start of a movement of the receiving part, means for locating the instantaneous position of the moving part and a signal processing circuit to which the means for locating the moving part and the sensor are connected so as to record, in a memory of the circuit, the position reached by the moving part when the receiving part, previously stationary on its support, just begins to be set in motion relative to its support as a result of its coming into contact with the driving part.
  • a movement detection device associated with the receiving part mounted idle this device comprising a sensor for movement emitting a signal at the start of a movement of the receiving part, means for locating the instantaneous position of the moving part and a signal processing circuit to which the means for locating the moving part and the sensor are connected so as to record, in a memory of the circuit, the position reached by the
  • FIG. 1 is a schematic view in vertical and transverse section (with respect to the web) of a detection device according to the invention used in a rotary offset printer of which only the lower part is shown, comprising the blanket cylinders and counterpart superimposed, which are shown separated from each other, that is to say offset without pressure.
  • Figure 2 is a schematic profile view taken from the right in Figure 1.
  • Figure 3 is a view similar to that of Figure 2, the two counterpart and blanket cylinders being shown in single contact position or "zero" position.
  • FIG. 1 A description will be given below, with reference to FIGS. 1 to 3 of the drawing, of an application of the detection method and device according to the invention to a rotary offset printing machine of which only the lower part is shown in FIG. 1.
  • This printing machine comprises two parallel horizontal cylinders arranged one above the other, namely an upper blanket cylinder 1 and a lower counterpart cylinder 2, cylinders between which passes a sheet of printing material 3.
  • the upper blanket cylinder 1 is integral with 'A shaft 4 which extends transversely (relative to the web 3) between two fixed bearings 5 carried by the uprights of the frame 6 of the printer.
  • the blanket cylinder 1 comprises, in the usual manner, a surface layer of flexible material.
  • the lower counterpart cylinder 2 is mounted on the frame 6 of the printer so that it can be moved vertically.
  • the counterpart cylinder 2, made of flexible or hard material, is integral with a support shaft 7 transverse to the ply 3.
  • the two opposite ends of the shaft 7 of the counterpart cylinder 2 are carried by respective bearings 8, 9 which can be moved vertically on the frame 6 of the printer, independently of each other, under the control of respective individual position adjustment mechanisms 11,12.
  • These mechanisms can be of any known type, for example with rotary screw and nut.
  • Each of these mechanisms provides a signal indicating the actual position of the bearing 8, 9 with which it is associated.
  • These position signals are applied respectively, by conductors 13, to a circuit 14 for processing the signals.
  • This circuit 14 includes in particular a memory for storing signals representing the effective positions of the movable bearings 8, 9.
  • a rotation detection device 15 is associated with the lower counterpart cylinder 2.
  • This device 15 which can be of any suitable type, for example photoelectric, inductive, etc., comprises a fixed sensor 16 disposed near the cylinder. 2, for example facing marks or marks 17 provided on a front face of the cylinder 2 or on an extreme part of its lateral surface.
  • the sensor 16 and the pins 17 are arranged, with respect to each other, in such a way that the start of the rotation drive of the lower counterpart cylinder 2 results in the emission of a signal which is then applied, by through a conductor 18, to the signal processing circuit 14.
  • the detection device makes it possible to determine the reference position or "zero" position of the two cylinders 1 and 2, in which they happen to be just in contact, without applying pressure, with the sheet of material to be printed 3 taken between them two.
  • the various constituent elements occupy the positions shown in FIGS. 1 and 2 and the two blanket 1 and counterpart 2 cylinders are separated from each other, the counterpart cylinder 2 being in the low position.
  • the operator controls the rotation of the single upper blanket cylinder 1 then constituting a "driving part", at low speed, as shown in FIG.
  • the operator lowers, by means of the adjustment mechanism 11, the left bearing 8 and the left part of the shaft 7 to their starting position. It then proceeds in the same way in the right part of the machine, causing the right bearing 9 to rise, until the "zero" position is also reached there and the corresponding signal is transmitted from the sensor. 16, to circuit 14, and then lowering this level.
  • the memory circuit 14 contains data corresponding to the "zero" position obtained in the left and right parts of the machine. It then suffices for the operator to simultaneously raise the two left 8 and right 9 bearings until the predetermined "zero" positions are reached in the manner described above. It is then certain that the axes of the two cylinders 1 and 2 are perfectly parallel to each other. A third phase of adjustment can take place in causing the right and left side of the counterpart cylinder 2 to rise simultaneously, after having adjusted the parallelism of the axes using the information already obtained. At this instant the sheet of material to be printed 3 is found to be just in contact with the surfaces of the two cylinders 1 and 2, without being subjected to a pressure. After that the operator commands an additional simultaneous movement, upwards, of the two bearings 8 and 9, and this over the same distance, to obtain a predetermined known value of the crushing of the flexible surface layer of the blanket cylinder 1 corresponding to a good quality print.
  • the lower cylinder 2 (part receiving the movement) which is alone mounted movable vertically relative to the upper cylinder 1 (driving part) mounted fixed on the frame of the machine.
  • the reverse arrangement could also be envisaged, the detection of the "zero" position, then taking place on the vertically movable upper cylinder, moving in the direction of the lower cylinder kept fixed on the frame of the machine.
  • the device for detecting the "zero" position according to the invention could also be used with a machine in which the cylinders are both mounted on the frame of the machine.
  • the device for detecting the contact position of the two cylinders and the method for parallelizing the axes of the two cylinders can be used both in the case where a ply passes between the two cylinders and in the case where such a ply is absent, the two cylinders then being directly tangent to one another.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)

Abstract

The present invention relates to a method and to a device for detecting, in a machine, the position at which two components (1, 2), at least (1, 2) of which can move, come into overall contact with respect to the other. This device is characterised in that it comprises a movement detection device (15) associated with the receiving component (2) mounted so that it can idle, this device including a movement sensor (16) emitting a signal as soon as the receiving component starts to move, means (11, 12) for identifying the instantaneous position of the movable component (2) and a signal processing circuit (14) to which are connected the means (11, 12) for identifying the movable component (2) and of the sensor (16) so as to record the position reached by the movable component (2) at the moment at which the receiving component just starts to be set into motion. <IMAGE>

Description

La présente invention concerne un procédé et un dispositif de détection, dans une machine, de la position de venue en contact de deux pièces dont l'une au moins est mobile, dans son ensemble, par rapport à l'autre, une première de ces pièces ou pièce motrice pouvant être mise en mouvement alors que la seconde pièce ou pièce réceptrice est montée folle sur son support, applicable plus particulièrement mais non exclusivement à des cylindres parallèles d'une imprimeuse rotative.The present invention relates to a method and a device for detecting, in a machine, the position of coming into contact of two parts, at least one of which is movable, as a whole, relative to the other, a first of these parts or driving part which can be set in motion while the second part or receiving part is mounted idly on its support, applicable more particularly but not exclusively to parallel cylinders of a rotary printer.

Dans une imprimeuse rotative du type offset une nappe de matériau à imprimer, tel que papier ou carton, défile à vitesse constante entre deux cylindres parallèles, tangents entre eux, à savoir un cylindre blanchet et un cylindre contrepartie. Le cylindre contrepartie est en une matière pouvant être dure ou souple tandis que la couche superficielle qui constitue le blanchet proprement dit, est en matière souple. Pendant l'impression de la nappe les deux cylindres sont appliqués sous pression l'un contre l'autre si bien que la couche de matière souple du cylindre blanchet est écrasée dans sa zone de contact avec le cylindre contrepartie, l'importance de cet écrasement dépendant de la pression exercée par le cylindre contrepartie sur le cylindre blanchet.In a rotary printing press of the offset type, a sheet of material to be printed, such as paper or cardboard, travels at constant speed between two parallel cylinders, tangent to each other, namely a blanket cylinder and a counterpart cylinder. The counter cylinder is made of a material which may be hard or flexible, while the surface layer which constitutes the blanket proper, is made of flexible material. During the printing of the web the two cylinders are applied under pressure against each other so that the layer of flexible material of the blanket cylinder is crushed in its zone of contact with the counterpart cylinder, the importance of this crushing depending on the pressure exerted by the counter cylinder on the blanket cylinder.

Pour obtenir une impression de bonne qualité, il est nécessaire que la couche superficielle souple du cylindre blanchet soit écrasée d'une valeur connue prédéterminée. Pour obtenir cette valeur d'écrasement prédéterminée il est donc nécessaire de déterminer préalablement la position de simple contact, sans pression, entre le cylindre contrepartie et le cylindre blanchet à couche superficielle souple, avec la nappe de matériau pincée entre eux. Cette position de simple contact, appelée encore position "zéro", qui varie en fonction de l'épaisseur de la nappe, sert de base de départ pour la course additionnelle du cylindre contrepartie, course dont la valeur est prédéterminée et donne, par suite de l'écrasement de la couche superficielle souple du cylindre blanchet, la pression voulue entre les deux cylindres avec la nappe à imprimer passant entre eux.To obtain a good quality impression, it is necessary that the flexible surface layer of the blanket cylinder be crushed by a predetermined known value. To obtain this predetermined crushing value, it is therefore necessary to determine beforehand the position of simple contact, without pressure, between the counter cylinder and the blanket cylinder with flexible surface layer, with the sheet of material pinched between them. This single contact position, also called the "zero" position, which varies as a function of the thickness of the ply, serves as the starting point for the additional stroke of the counterpart cylinder, the stroke the value is predetermined and gives, as a result of the crushing of the flexible surface layer of the blanket cylinder, the desired pressure between the two cylinders with the sheet to be printed passing between them.

Jusqu'à présent cette position de référence ou position "zéro" a été déterminé empiriquement, pour chaque épaisseur de nappe, par l'opérateur de la machine. Pour ce faire l'opérateur entraîne en rotation le cylindre blanchet, alors écarté du cylindre contrepartie, et il engage entre les deux cylindres un morceau de la nappe à imprimer ou d'un matériau ayant la même épaisseur puis il rapproche le cylindre contrepartie du cylindre blanchet, jusqu'à ce que le contact soit établi. L'instant de ce simple contact, sans pression, est déterminé au moment où le morceau de nappe qui se trouve alors lui-même en contact avec les surfaces périphériques des deux cylindres, est entraîné par suite de son pincement entre les deux cylindres. Il suffit alors à l'opérateur de repérer cette position "zéro" et de la prendre comme base de départ pour le calage ultérieur en pression, se traduisant par l'écrasement prédéterminé de la couche périphérique du cylindre blanchet.Up to now, this reference position or "zero" position has been determined empirically, for each ply thickness, by the machine operator. To do this, the operator rotates the blanket cylinder, then moved away from the counter cylinder, and engages between the two cylinders a piece of the tablecloth to be printed or of a material having the same thickness, then it brings the counter cylinder closer to the cylinder. blanket, until contact is established. The instant of this simple contact, without pressure, is determined at the moment when the piece of ply which is then itself in contact with the peripheral surfaces of the two cylinders, is driven as a result of its pinching between the two cylinders. It then suffices for the operator to locate this "zero" position and to take it as a starting base for the subsequent pressure setting, resulting in the predetermined crushing of the peripheral layer of the blanket cylinder.

Il est clair que cette méthode manuelle et empirique de détermination de la position "zéro" est peu commode à mettre en oeuvre. La présente invention vise à remédier à cet inconvénient en procurant un dispositif permettant de détecter automatiquement cette position "zéro".It is clear that this manual and empirical method of determining the "zero" position is inconvenient to implement. The present invention aims to remedy this drawback by providing a device for automatically detecting this "zero" position.

A cet effet ce procédé de détection, dans une machine, de la position de contact de deux pièces dont l'une au moins est mobile, dans son ensemble, par rapport à l'autre, une première de ces pièces ou pièce motrice pouvant être mise en mouvement alors que la seconde pièce ou pièce réceptrice est montée folle sur son support, est caractérisé en ce qu'on met en mouvement la pièce motrice en laissant la pièce réceptrice immobile, on effectue un déplacement relatif des deux pièces motrice et réceptrice jusqu'à ce qu'elles viennent en contact, on relève le début du mouvement de la pièce réceptrice, initialement immobile, qui résulte de sa venue en contact avec la pièce motrice en mouvement, et on enregistre alors les positions occupées par les deux pièces motrice et réceptrice, au moment où la pièce réceptrice, précédemment immobile, commence à être mise en mouvement, comme définissant la position de contact des deux pièces.To this end, this method of detecting, in a machine, the contact position of two parts, at least one of which is movable, as a whole, relative to the other, a first of these parts or driving part being able to be set in motion while the second part or receiving part is mounted loosely on its support, is characterized in that the driving part is set in motion while leaving the receiving part immobile, a relative movement of the two driving and receiving parts is carried out until they come into contact, the beginning of the movement of the receiving part, initially stationary, which results from its coming into contact with the moving driving part, is noted, and the positions occupied by the two driving and receiving parts are then recorded, at the moment when the previously immobile receiving part begins to be set in motion, as defining the contact position of the two parts.

L'invention a également pour objet un dispositif pour la mise en oeuvre du procédé de détection susmentiomé, ce dispositif étant caractérisé en ce qu'il comprend un dispositif de détection de mouvement associé à la pièce réceptrice montée folle, ce dispositif comportant un capteur de mouvement émettant un signal dès le début d'un mouvement de la pièce réceptrice, des moyens de repérage de la position instantanée de la pièce mobile et un circuit de traitement de signaux auquels sont connectès les moyens de repérage de la pièce mobile et le capteur de manière à enregistrer, dans une mémoire du circuit, la position atteinte par la pièce mobile au moment où la pièce réceptrice, précédemment immobile sur son support, commence juste à être mise en mouvement par rapport à son support par suite de sa venue en contact avec la pièce motrice.The invention also relates to a device for implementing the above-mentioned detection method, this device being characterized in that it comprises a movement detection device associated with the receiving part mounted idle, this device comprising a sensor for movement emitting a signal at the start of a movement of the receiving part, means for locating the instantaneous position of the moving part and a signal processing circuit to which the means for locating the moving part and the sensor are connected so as to record, in a memory of the circuit, the position reached by the moving part when the receiving part, previously stationary on its support, just begins to be set in motion relative to its support as a result of its coming into contact with the driving part.

On décrira ci-après, à titre d'exemple non limitatif, forme d'exécution de la présente invention, en référence aux dessins annexés sur lesquels:An embodiment of the present invention will be described below, by way of non-limiting example, with reference to the appended drawings in which:

La figure 1 est une vue schématique en coupe verticale et transversale (par rapport à la nappe) d'un dispositif de détection suivant l'invention utilisé dans une imprimeuse rotative offset dont seule est représentée la partie inférieure, comprenant les cylindres blanchet et contrepartie superposés, qui sont représentés écartés l'un de l'autre, c'est-à-dire décalés hors pression.FIG. 1 is a schematic view in vertical and transverse section (with respect to the web) of a detection device according to the invention used in a rotary offset printer of which only the lower part is shown, comprising the blanket cylinders and counterpart superimposed, which are shown separated from each other, that is to say offset without pressure.

La figure 2 est une vue de profil schématique prise de la droite sur la figure 1.Figure 2 is a schematic profile view taken from the right in Figure 1.

La figure 3 est une vue semblable à celle de la figure 2, les deux cylindres contrepartie et blanchet étant représentés en position de simple contact ou position "zéro".Figure 3 is a view similar to that of Figure 2, the two counterpart and blanket cylinders being shown in single contact position or "zero" position.

On décrira ci-après, en se référant aux figures 1 à 3 du dessin, une application du procédé et du dispositif de détection suivant l'invention à une imprimeuse rotative offset dont seule la partie inférieure est représentée sur la figure 1. Cette imprimeuse comprend deux cylindres horizontaux parallèles disposés l'un au-dessus de l'autre, à savoir un cylindre blanchet supérieur 1 et un cylindre contrepartie inférieur 2, cylindres entre lesquels passe une nappe de matériau à imprimer 3. Le cylindre blanchet supérieur 1 est solidaire d'un arbre 4 qui s'étend transversalement (par rapport à la nappe 3) entre deux paliers fixes 5 portés par des montants du bâti 6 de l'imprimeuse. Le cylindre blanchet 1 comprend, de la manière habituelle, une couche superficielle en matière souple.A description will be given below, with reference to FIGS. 1 to 3 of the drawing, of an application of the detection method and device according to the invention to a rotary offset printing machine of which only the lower part is shown in FIG. 1. This printing machine comprises two parallel horizontal cylinders arranged one above the other, namely an upper blanket cylinder 1 and a lower counterpart cylinder 2, cylinders between which passes a sheet of printing material 3. The upper blanket cylinder 1 is integral with 'A shaft 4 which extends transversely (relative to the web 3) between two fixed bearings 5 carried by the uprights of the frame 6 of the printer. The blanket cylinder 1 comprises, in the usual manner, a surface layer of flexible material.

Le cylindre contrepartie inférieur 2 est monté sur le bâti 6 de l'imprimeuse de manière à pouvoir être déplacé verticalement. Le cylindre contrepartie 2, en matière souple ou dure, est solidaire d'un arbre support 7 transversal par rapport à la nappe 3. Les deux extrémités opposées de l'arbre 7 du cylindre contrepartie 2 sont portées par des paliers respectifs 8,9 qui peuvent être déplacés verticalement sur le bâti 6 de l'imprimeuse, indépendamment l'un de l'autre, sous la commande de mécanismes de réglage de position individuels respectifs 11,12. Ces mécanismes peuvent être de tout type connu, par exemple à vis rotative et écrou. Chacun de ces mécanismes fournit un signal indiquant la position effective du palier 8,9 auquel il est associé. Ces signaux de position sont appliqués respectivement, par des conducteurs 13, à un circuit 14 de traitement des signaux. Ce circuit 14 comprend notamment une mémoire pour stocker des signaux représentant les positions effectives des paliers mobiles 8,9.The lower counterpart cylinder 2 is mounted on the frame 6 of the printer so that it can be moved vertically. The counterpart cylinder 2, made of flexible or hard material, is integral with a support shaft 7 transverse to the ply 3. The two opposite ends of the shaft 7 of the counterpart cylinder 2 are carried by respective bearings 8, 9 which can be moved vertically on the frame 6 of the printer, independently of each other, under the control of respective individual position adjustment mechanisms 11,12. These mechanisms can be of any known type, for example with rotary screw and nut. Each of these mechanisms provides a signal indicating the actual position of the bearing 8, 9 with which it is associated. These position signals are applied respectively, by conductors 13, to a circuit 14 for processing the signals. This circuit 14 includes in particular a memory for storing signals representing the effective positions of the movable bearings 8, 9.

Suivant l'invention un dispositif de détection de rotation 15 est associé au cylindre contrepartie inférieur 2. Ce dispositif 15 qui peut être de tout type approprié, par exemple photoélectrique, inductif etc..., comprend un capteur fixe 16 disposé à proximité du cylindre 2, par exemple en regard de marques ou repères 17 prévus sur une face frontale du cylindre 2 ou sur une partie extrême de sa surface latérale. Le capteur 16 et les repères 17 sont disposés, les uns par rapport aux autres, de telle façon que le début de l'entraînement en rotation du cylindre contrepartie inférieur 2 se traduise par l'émission d'un signal qui est alors appliqué, par l'intermédiaire d'un conducteur 18, au circuit de traitement des signaux 14.According to the invention, a rotation detection device 15 is associated with the lower counterpart cylinder 2. This device 15 which can be of any suitable type, for example photoelectric, inductive, etc., comprises a fixed sensor 16 disposed near the cylinder. 2, for example facing marks or marks 17 provided on a front face of the cylinder 2 or on an extreme part of its lateral surface. The sensor 16 and the pins 17 are arranged, with respect to each other, in such a way that the start of the rotation drive of the lower counterpart cylinder 2 results in the emission of a signal which is then applied, by through a conductor 18, to the signal processing circuit 14.

On décrira maintenant, d'une manière détaillée, la façon dont le dispositif de détection suivant l'invention permet de déterminer la position de référence ou position "zéro" des deux cylindres 1 et 2, dans laquelle ils se trouvent être juste en contact, sans application d'une pression, avec la nappe de matériau à imprimer 3 prise entre eux deux. En position de départ les différents éléments constitutifs occupent les positions représentées sur les figures 1 et 2 et les deux cylindres blanchet 1 et contrepartie 2 sont écartés l'un de l'autre, le cylindre contrepartie 2 étant en position basse. Pour effectuer la détermination de la position "zéro" l'opérateur commande la mise en rotation du seul cylindre blanchet supérieur 1 constituant alors une "pièce motrice", à faible vitesse, ainsi qu'il est représenté sur la figure 2, alors que le cylindre contrepartie inférieur 2, constituant une "pièce réceptrice" montée folle, est maintenu immobile autour de son axe. Il commande ensuite une montée en biais de l'arbre 7, en provoquant, par exemple, en premier lieu une montée du palier gauche 8 par l'intermédiaire du mécanisme de réglage de position gauche 11. Au moment où la partie gauche du cylindre contrepartie 2 vient en contact avec la partie inférieure gauche du cylindre blanchet 1 qui est alors seul entraîné en rotation, le cylindre contrepartie inférieur 2 commence à être entraîné à son tour en rotation ce qui est immédiatement relevé par le dispositif de détection 15, le capteur 16 émettant un signal transmis par le conducteur 18 au circuit 14. Ce signal provoque, dans ce circuit 14, le stockage de l'information relative à la position verticale atteinte par le palier mobile gauche 8 lors de la venue en contact des deux cylindres.We will now describe, in a detailed manner, how the detection device according to the invention makes it possible to determine the reference position or "zero" position of the two cylinders 1 and 2, in which they happen to be just in contact, without applying pressure, with the sheet of material to be printed 3 taken between them two. In the starting position, the various constituent elements occupy the positions shown in FIGS. 1 and 2 and the two blanket 1 and counterpart 2 cylinders are separated from each other, the counterpart cylinder 2 being in the low position. To carry out the determination of the "zero" position, the operator controls the rotation of the single upper blanket cylinder 1 then constituting a "driving part", at low speed, as shown in FIG. 2, while the lower counterpart cylinder 2, constituting a madly mounted "receiving part", is held stationary around its axis. It then controls an incline rise of the shaft 7, causing, for example, firstly a rise of the left bearing 8 via the left position adjustment mechanism 11. When the left part of the counterpart cylinder 2 comes into contact with the lower left part of the blanket cylinder 1 which is then only driven in rotation, the lower counterpart cylinder 2 begins to be rotated in turn which is immediately detected by the detection device 15, the sensor 16 emitting a signal transmitted by the conductor 18 to the circuit 14. This signal causes, in this circuit 14, the storage of the information relating to the vertical position reached by the left movable bearing 8 when the two cylinders come into contact.

Une fois cette première mesure effectuée, l'opérateur fait redescendre, au moyen du mécanisme de réglage 11, le palier gauche 8 et la partie gauche de l'arbre 7 jusqu'à leur position de départ. Il procède ensuite de la même façon dans la partie droite de la machine, en provoquant la montée du palier droit 9, jusqu'à ce que la position "zéro" là aussi soit atteinte et que le signal correspondant soit transmis, à partir du capteur 16, au circuit 14, et en faisant ensuite redescendre ce palier.Once this first measurement has been made, the operator lowers, by means of the adjustment mechanism 11, the left bearing 8 and the left part of the shaft 7 to their starting position. It then proceeds in the same way in the right part of the machine, causing the right bearing 9 to rise, until the "zero" position is also reached there and the corresponding signal is transmitted from the sensor. 16, to circuit 14, and then lowering this level.

Après ces opérations, le circuit à mémoire 14 contient des données correspondant aux position "zéro" obtenues dans les parties gauche et droite de la machine. Il suffit alors à l'opérateur de faire remonter simultanément les deux paliers gauche 8 et droit 9 jusqu'à ce que l'on atteigne les positions "zéro" prédéterminées de la façon décrite ci -dessus. On est alors sûr que les axes des deux cylindres 1 et 2 sont parfaitement parallèles l'un à l'autre. Une troisième phase de réglage peut avoir lieu en faisant monter simultanément le côté droit et gauche du cylindre contrepartie 2, après avoir réglé le parallélisme des axes à l'aide des informations déjà obtenues. A cet instant la nappe de matériau à imprimer 3 se trouve être juste en contact avec les surfaces des deux cylindres 1 et 2, sans être soumise à une pression. Après cela l'opérateur commande un déplacement additionnel simultané, vers le haut, des deux paliers 8 et 9, et ce sur la même distance, pour obtenir une valeur connue prédéterminée de l'écrasement de la couche superficielle souple du cylindre blanchet 1 correspondant à une impression de bonne qualité.After these operations, the memory circuit 14 contains data corresponding to the "zero" position obtained in the left and right parts of the machine. It then suffices for the operator to simultaneously raise the two left 8 and right 9 bearings until the predetermined "zero" positions are reached in the manner described above. It is then certain that the axes of the two cylinders 1 and 2 are perfectly parallel to each other. A third phase of adjustment can take place in causing the right and left side of the counterpart cylinder 2 to rise simultaneously, after having adjusted the parallelism of the axes using the information already obtained. At this instant the sheet of material to be printed 3 is found to be just in contact with the surfaces of the two cylinders 1 and 2, without being subjected to a pressure. After that the operator commands an additional simultaneous movement, upwards, of the two bearings 8 and 9, and this over the same distance, to obtain a predetermined known value of the crushing of the flexible surface layer of the blanket cylinder 1 corresponding to a good quality print.

Bien que la description qui précède, ait porté sur l'application de l'invention à la détection de la position "zéro" du cylindre contrepartie, mobile verticalement, d'une imprimeuse rotative offset, il va de soi que le dispositif de détection de cette position "zéro" peut s'appliquer dans d'autres domaines chaque fois que l'on veut relever la position de simple venue en contact, sans pression, de deux pièces dont l'une peut être motrice et l'autre réceptrice d'un mouvement par rapport à un capteur.Although the foregoing description relates to the application of the invention to the detection of the "zero" position of the counterpart cylinder, vertically movable, of a rotary offset printer, it goes without saying that the device for detecting this "zero" position can be applied in other fields whenever we want to raise the position of simple coming into contact, without pressure, of two parts, one of which can be driven and the other receiving movement relative to a sensor.

Dans l'exemple décrit précédemment, c'est le cylindre inférieur 2 (pièce réceptrice du mouvement) qui est seul monté mobile verticalement par rapport au cylindre supérieur 1 (pièce motrice) monté fixe sur le bâti de la machine. Toutefois la disposition inverse pourrait être également envisagée, la détection de la position "zéro", s'effectuant alors sur le cylindre supérieur mobile verticalement, se déplaçant en direction du cylindre inférieur maintenu fixe sur le bâti de la machine. Le dispositif de détection de la position "zéro" suivant l'invention pourrit être également être utilisé avec une machine dans laquelle les cylindres seraient montés tous les deux mobiles sur le bâti de la machine.In the example described above, it is the lower cylinder 2 (part receiving the movement) which is alone mounted movable vertically relative to the upper cylinder 1 (driving part) mounted fixed on the frame of the machine. However, the reverse arrangement could also be envisaged, the detection of the "zero" position, then taking place on the vertically movable upper cylinder, moving in the direction of the lower cylinder kept fixed on the frame of the machine. The device for detecting the "zero" position according to the invention could also be used with a machine in which the cylinders are both mounted on the frame of the machine.

Par ailleurs le dispositif de détection de la position de contact des deux cylindres et le procédé de mise en parallèle des axes des deux cylindres peuvent être utilisés aussi bien dans le cas où une nappe passe entre les deux cylindres que dans le cas où une telle nappe est absente, les deux cylindres étant alors directement tangent l'un à l'autre.Furthermore, the device for detecting the contact position of the two cylinders and the method for parallelizing the axes of the two cylinders can be used both in the case where a ply passes between the two cylinders and in the case where such a ply is absent, the two cylinders then being directly tangent to one another.

Claims (5)

1.- Procédé de détection, dans une machine, de la position de contact de deux pièces (1,2) dont l'une au moins (2) est mobile, dans son ensemble, par rapport à l'autre, une première de ces pièces ou pièce motrice pouvant être mise en mouvement alors que la seconde pièce ou pièce réceptrice est montée folle sur son support, caractérisé en ce qu'on met en mouvement la pièce motrice (1) en laissant la pièce réceptrice (2) immobile, on effectue un déplacement relatif des deux pièces motrice et réceptrice (1,2) jusqu'à ce qu'elles viennent en contact, on relève le début du mouvement de la pièce réceptrice (2), initialement immobile, qui résulte de sa venue en contact avec la pièce motrice en mouvement, et on enregistre alors les positions occupées par les deux pièces motrice et réceptrice (1,2), au moment où la pièce réceptrice (2), précédemment immobile, commence à être mise en mouvement, comme définissant la position de contact des deux pièces (1,2). 1.- Method for detecting, in a machine, the contact position of two parts (1,2) at least one of which (2) is movable, as a whole, with respect to the other, a first of these parts or driving part being able to be moved while the second part or receiving part is mounted idly on its support, characterized in that the driving part (1) is set in motion while leaving the receiving part (2) immobile, a relative movement of the two driving and receiving parts (1,2) is carried out until they come into contact, the beginning of the movement of the receiving part (2), initially stationary, is noted, which results from its coming in contact with the moving part, and the positions occupied by the two driving and receiving parts (1,2) are then recorded, when the previously immobile receiving part (2) begins to be set in motion, as defining the contact position of the two parts (1,2) . 2.- Procédé suivant la revendication 1 caractérisé en ce que les pièces motrice et réceptrice sont deux cylindres parallèles (1,2) dont l'un au moins peut être déplacé, parallèlement à lui-même, en direction de l'autre cylindre. 2.- Method according to claim 1 characterized in that the driving and receiving parts are two parallel cylinders (1,2) at least one of which can be moved, parallel to itself, in the direction of the other cylinder. 3.- Procédé suivant la revendication 2, appliqué à la mise en parallèle des axes des deux cylindres (1,2), caractérisé en ce qu'on entraîne en rotation un premier cylindre (1) autour de son axe, on déplace un premier palier mobile (8) du second cylindre (2), maintenu immobile autour de son axe, en direction du premier cylindre (1), jusqu'à ce qu'une première extrémité du second cylindre (2) vienne en contact avec le premier cylindre (1), on détecte à cet instant l'entraînement en rotation du second cylindre (2) par le premier cylindre (1), et on met en mémoire la position atteinte par le second cylindre (2), du côté de son premier palier (8), lors de la venue en contact des deux cylindres (1,2), on déplace en sens inverse le premier palier mobile (8) pour le ramener en position de départ, et on répète ces opérations pour le second palier mobile (9) du second cylindre (2), de manière à détecter et mettre en mémoire la position de contact entre les deux cylindres (1,2), du côté du second palier mobile (9), et, après avoir ramené le second palier mobile (9) en position de départ, on déplace à nouveau simultanément les deux paliers mobiles (8,9) pour les amener tous les deux dans leurs positions, mesurées précédemment, correspondant au contact des deux cylindres, ce qui assure le parallélisme des axes des deux cylindres (1,2). 3.- Method according to claim 2, applied to the parallelization of the axes of the two cylinders (1,2), characterized in that one rotates a first cylinder (1) around its axis, a first is moved movable bearing (8) of the second cylinder (2), held stationary around its axis, in the direction of the first cylinder (1), until a first end of the second cylinder (2) comes into contact with the first cylinder (1), the rotation drive of the second cylinder (2) by the first cylinder (1) is detected at this instant, and the position reached is stored in memory by the second cylinder (2), on the side of its first bearing (8), when the two cylinders (1,2) come into contact, the first movable bearing (8) is moved in the opposite direction to bring it back into position starting point, and these operations are repeated for the second movable bearing (9) of the second cylinder (2), so as to detect and store the position of contact between the two cylinders (1,2), on the side of the second bearing mobile (9), and, after having brought the second mobile bearing (9) back to the starting position, the two mobile bearings (8, 9) are again moved simultaneously to bring them both into their corresponding positions, measured previously, in contact with the two cylinders, which ensures the parallelism of the axes of the two cylinders (1,2). 4.- Dispositif de détection, dans une machine, de la position de contact de deux pièces (1,2) dont l'une au moins (2) est mobile, dans son ensemble, par rapport à l'autre, une première de ces pièces ou pièce motrice pouvant être mise en mouvement alors que la seconde pièce ou pièce réceptrice est montée folle sur son support, caractérisé en ce qu'il comprend un dispositif de détection de mouvement (15) associé à la pièce réceptrice (2) montée folle, ce dispositif comportant un capteur de mouvement (16) émettant un signal dès le début d'un mouvement de la pièce réceptrice, des moyens (11,12) de repérage de la position instantanée de la pièce mobile (2) et un circuit de traitement de signaux (14) auquel sont connectés les moyens (11,12) de repérage de la pièce mobile (2) et le capteur (16) de manière à enregistrer, dans une mémoire du circuit (14), la position atteinte par la pièce mobile (2) au moment où la pièce réceptrice, précédemment immobile sur son support, commence juste à être mise en mouvement par rapport à son support par suite de sa venue en contact avec la pièce motrice (1). 4.- Device for detecting, in a machine, the contact position of two parts (1,2), at least one of which (2) is movable, as a whole, with respect to the other, a first of these parts or driving part can be set in motion while the second part or receiving part is mounted idly on its support, characterized in that it comprises a movement detection device (15) associated with the receiving part (2) mounted crazy, this device comprising a movement sensor (16) transmitting a signal at the start of a movement of the receiving part, means (11,12) for locating the instantaneous position of the moving part (2) and a circuit signal processing (14) to which are connected the means (11,12) for locating the moving part (2) and the sensor (16) so as to record, in a memory of the circuit (14), the position reached by the moving part (2) when the previously stationary receiving part s ur its support, just begins to be moved relative to its support as a result of its coming into contact with the driving part (1). 5.- Dispositif suivant la revendication 4 caractérisé en ce que les pièces motrice et réceptrice sont deux cylindres parallèles (1,2) dont l'un au moins peut être déplacé, parallèlement à lui-même, en direction de l'autre cylindre. 5.- Device according to claim 4 characterized in that the driving and receiving parts are two parallel cylinders (1,2), at least one of which can be moved, parallel to itself, in the direction of the other cylinder.
EP19930400420 1992-02-21 1993-02-18 Method and apparatus to detect the contact position of two parts where at least one part is mobile Expired - Lifetime EP0557198B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9202047 1992-02-21
FR9202047A FR2687605B1 (en) 1992-02-21 1992-02-21 METHOD AND DEVICE FOR DETECTING, IN A MACHINE, THE POSITION OF COMING INTO CONTACT WITH TWO PARTS OF WHICH AT LEAST ONE IS MOBILE.

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EP0557198A1 true EP0557198A1 (en) 1993-08-25
EP0557198B1 EP0557198B1 (en) 1996-06-19

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JP (1) JPH0671867A (en)
DE (1) DE69303192T2 (en)
FR (1) FR2687605B1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0627309A1 (en) * 1993-06-01 1994-12-07 MAN Roland Druckmaschinen AG Device for adjusting the contact position between two cylinders whose spacing can be adjusted
EP0718101A1 (en) * 1994-12-23 1996-06-26 The Langston Corporation Printing apparatus
EP0875377A1 (en) * 1997-04-02 1998-11-04 Valmet Rotomec s.p.a. Apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straightline paths
EP1018426A1 (en) * 1999-01-07 2000-07-12 Fischer & Krecke Gmbh & Co. Method for setting the pressure between two cylinders of a printing machine
WO2003035398A1 (en) * 2001-10-24 2003-05-01 Nebiolo Printech S.P.A. An offset printing press

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110027306B (en) * 2019-05-03 2021-08-17 深圳市图加特实业有限公司 Printing machine with clutch mechanism adjusting function and working method
CN111421947B (en) * 2020-04-17 2021-12-28 汕头市晟涛印刷有限公司 Cooling roller lifting fine-adjustment positioning mechanism for printing equipment

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Publication number Priority date Publication date Assignee Title
DE491084C (en) *
US4132166A (en) * 1977-10-07 1979-01-02 Aldo Bugnone Mounting for rotary cylinders, particularly in a printing press

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Publication number Priority date Publication date Assignee Title
DE491084C (en) *
US4132166A (en) * 1977-10-07 1979-01-02 Aldo Bugnone Mounting for rotary cylinders, particularly in a printing press

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0627309A1 (en) * 1993-06-01 1994-12-07 MAN Roland Druckmaschinen AG Device for adjusting the contact position between two cylinders whose spacing can be adjusted
US5517919A (en) * 1993-06-01 1996-05-21 Man Roland Druckmaschinen Ag Method for adjusting contact between two rollers which are adjustable with respect to their distance relative to one another
US5622114A (en) * 1993-06-01 1997-04-22 Man Roland Druckmaschinen Ag Method for adjusting contact between two rollers which are adjustable with respect to their distance relative to one another
EP0718101A1 (en) * 1994-12-23 1996-06-26 The Langston Corporation Printing apparatus
US5657694A (en) * 1994-12-23 1997-08-19 Weishew; Joseph John Method of and apparatus for loading a wiper roll against an anilox roll
EP0875377A1 (en) * 1997-04-02 1998-11-04 Valmet Rotomec s.p.a. Apparatus for detecting mutual positions and controlling travelling of a plurality of working components sequentially mobile along parallel straightline paths
EP1018426A1 (en) * 1999-01-07 2000-07-12 Fischer & Krecke Gmbh & Co. Method for setting the pressure between two cylinders of a printing machine
WO2003035398A1 (en) * 2001-10-24 2003-05-01 Nebiolo Printech S.P.A. An offset printing press

Also Published As

Publication number Publication date
JPH0671867A (en) 1994-03-15
FR2687605B1 (en) 1994-04-29
DE69303192T2 (en) 1997-02-20
FR2687605A1 (en) 1993-08-27
DE69303192D1 (en) 1996-07-25
EP0557198B1 (en) 1996-06-19

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