EP0047413A1 - Process and device to control the arrival of single pushed on sheets of flexible material - Google Patents

Process and device to control the arrival of single pushed on sheets of flexible material Download PDF

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Publication number
EP0047413A1
EP0047413A1 EP19810106449 EP81106449A EP0047413A1 EP 0047413 A1 EP0047413 A1 EP 0047413A1 EP 19810106449 EP19810106449 EP 19810106449 EP 81106449 A EP81106449 A EP 81106449A EP 0047413 A1 EP0047413 A1 EP 0047413A1
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EP
European Patent Office
Prior art keywords
sheet
arrival
sheets
machine
time interval
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Granted
Application number
EP19810106449
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German (de)
French (fr)
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EP0047413B1 (en
Inventor
Peter Lehner
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Weitmann and Konrad GmbH and Co KG
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Weitmann and Konrad GmbH and Co KG
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H9/00Registering, e.g. orientating, articles; Devices therefor
    • B65H9/20Assisting by photoelectric, sonic, or pneumatic indicators

Definitions

  • the invention relates to a method for controlling the arrival of individually fed sheets of flexible material at the inlet of sheet-processing machines, in particular printing machines, in which the arrival of the sheet at a contact point is determined by means of scanning means within a predetermined time interval. Furthermore, the invention also relates to an apparatus for performing such a method.
  • sheet-processing machines for example offset printing machines, in which paper sheets are printed in one or more colors
  • an application device which feeds the individual sheets to the machine, so that they arrive at a contact point near the machine inlet within a predetermined time interval and from there the gripper links or the like can be entered into the machine.
  • the feeding of the sheets must be done with the machine cycle, i.e. H. be synchronized with the rotational speed of sheet-guiding rollers.
  • a sheet arriving outside the specified time interval, i.e. too early or too late, would lead to disruptions in the production process.
  • the machine manufacturer has set the synchronization between the feeder and the sheet-processing machine. If the sheet arrival falls outside the aforementioned tolerance range, the sheet travel must be corrected manually, for example by changing the blown air or by adjusting the application device, and there is generally no reason to change the manipulated variable in question. One is therefore largely dependent on empiricism. H. it often takes a long time until the variable manipulated variables are set so that the sheet-processing machine and feeder work again in the correct cycle.
  • the object is achieved according to the invention in that the arrival of the sheet at the contact point is additionally monitored with reference to a smaller time range, which corresponds to the optimum sheet arrival, and corresponds to the sheet advance depending on this is regulated.
  • a signal transmitter indicating the optimal arrival is provided, the output signal of which triggers a manual or automatic readjustment of the sheet feed.
  • a stack 2 of sheets of paper to be printed rests on a platform 3 which can be raised in the direction of arrow 4, so that the top sheet 5 is essentially always removed when the sheets are continuously removed from the stack in the same Height.
  • a transfer device 7 known per se for example equipped with suction heads 6, transfers the top sheets 5 in each case to an inclined feed table 8, on which they advance with partial overlap up to a stop 9 arranged on the front edge of the table 8.
  • the arrival of a sheet 5 is sensed, for example in a small gap between the front edge of the table 8 and stop 9, by a light barrier 1o consisting of two or more electro-optical reflex sensors.
  • FIG. 1 Behind the stop 9 forming a contact point for the sheets 5 is the inlet of a printing press, of which only one roller 11 and another roller 12 are partially shown in FIG. 1.
  • the rollers 11, 12 rotate in the direction of the arrows 13 at a constant speed.
  • Known grippers 14 are arranged on the roller 11, which grasp the sheets 5 that have arrived at the contact point and insert them into the machine after the stop 9 has previously been automatically moved out of the way at the right time. After the sheet 5 has been drawn into the machine, the stop 5 returns to its starting position. The movement of the stop 9 takes place in the direction of the double arrow 15.
  • a sheet 5 can only be gripped by the gripper 14 if synchronization is established between the sheet fed and fed by the application device 1 and the rotating roller 11 in such a way that a sheet 5 is always present at the contact point when the gripper 14 is within a certain range of rotation angle in the vicinity of the contact point.
  • This rotation angle range corresponds to a certain time interval, which is shown in FIG. 2 by the distance between A and B.
  • electrical switching devices are provided which include a rotary angle sensor which detects the predetermined time interval between A and B and which cooperates with the light barrier 1o in such a way that it can always be ascertained whether a sheet is properly in contact with the stop 9 in the time interval A, B. If this is not the case, the machine is switched off automatically.
  • the optimal arrival of the bow lies approximately in the middle of the time interval A, B and is represented in FIG. 3 by the substantially smaller time range E, F located within the interval A, B.
  • the sheet arrival located in this time range E, F is additionally monitored and, depending on this, the sheet advance is already regulated accordingly at the application device 1.
  • the idea of the invention is therefore not to wait until the sheet arrival falls outside the predetermined time interval A, B and the machine is brought to a standstill, but also to monitor within the interval A, B and thereby prevent the sheet arrival from falling out by appropriate adjustments, For example, to prevent the application device 1, so that it is not possible to switch off the machine and a related loss of production.
  • Fig. 4 shows again enlarged the roller 11 rotating in the direction of arrow 13 with the gripper 14.
  • the markings A and B indicate the range of rotation or the corresponding one Time interval within which an arc 5 from the gripper 14. can be detected and drawn into the machine. Within this time interval, an arc on the stop 9 must be received and applied correctly, which is done by the light barrier 1 0 in connection with a time interval A, B signaling switching element.
  • the light barrier 10 is now assigned a further switching element which signals the optimal arrival of the bow, which is represented schematically in FIG. 4 by a microswitch 16 and a cam 18 which actuates the latter and is arranged on the shaft 17 of the roller 11.
  • This arrangement which functions as a rotation angle transmitter, supplies a signal associated with the time range E, F, i.e. the optimal arrival of the bow, which is used in conjunction with the light barrier 10o in a known manner to determine in an electrical comparison circuit whether the arrival of the bow is too early, i.e. before Time E is whether the sheet arrival is correctly in the time range between E and F, or whether the sheet arrives too late, ie arrives at stop 9 after time F.
  • the correction and readjustment of the sheet feed can also be carried out automatically using the described method. If one of the three options mentioned above is signaled, a simple adjustment means can be used to give an adjusting motor of the application device 1 the command to rotate forwards or backwards for a certain time until the sheet arrival again falls within the optimal time range E, F.
  • a counter built into the switching arrangement assigned to the machine in a manner known per se adds up the number of sheets arriving too early or too late and triggers an adjustment command only when a certain number of sheets arriving in succession, for example three sheets, fall incorrectly in the range E, F with regard to their arrival time.
  • the arrangement according to the invention described has the advantage that an additional installation of measuring devices or sensors in the form of light barriers 1 0 od. Like. Is not required. It is sufficient to additionally install the rotary angle sensor represented by the parts 16 and 18, which interrogates the time range E, F, in order to carry out a manual or automatic correction of the application device 1. Since the time range E, F was not sensed in known machines and was not used for control purposes, it has so far not been possible at all to recognize the optimal arrival of the sheet with reference to the angle of rotation of the roller 11 and to make corresponding corrections to the application device.
  • the invention thus makes it possible that the application device 1 can always be optimally adjusted, possibly also by remote control, regardless of the machine speed, the nature of the sheets 5 to be fed and their surface, so that downtimes of the machine can be avoided. This enables a higher machine speed (printing speed) and greater machine performance with relatively little additional effort.
  • the rule or control principle according to the invention is otherwise not limited to monitoring the arrival of individual sheets.
  • this principle also enables, for example, an application register check on a printing press or the like supplied sheet.
  • there is a larger measuring area assigned to the precise sheet arrangement and / or sheet alignment, which is scanned by a light barrier or the like. If a sheet is outside this measuring range shortly before it is fed into the machine, the machine is switched off.
  • a smaller measuring range is now scanned, for example by a second reflection light barrier, which is denoted by the reference numeral 20 in FIG. 1, and is brought into relation with the adjacent and aligning sheets.
  • the larger measuring range can be, for example, 1 to 2 mm.
  • the more precise measuring range scanned by the light barrier 2o can be less than 1/10 mm. Continuous monitoring of the sheets in this small measuring range and corresponding readjustment of the relevant manipulated variables can then ensure proper sheet feeding without switching off the machine. With this arrangement, too, the different measuring ranges can be interrogated at different times.
  • the advantages of this arrangement are that measures are taken in good time Correction of application and / or register errors can be initiated, that a constant statement about the application quality of the processed sheets is possible and that a higher printing speed can be achieved through better machine settings.

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  • Controlling Sheets Or Webs (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)
  • Discharge By Other Means (AREA)

Abstract

1. A method for controlling the arrival of individually advanced sheets of flexible material at the inlet of sheet-processing machines, in particular printing machines, in the case of which the arrival of the sheet at a feed position is detected by sensing means within a predetermined time interval, characterized in that the arrival of the sheet (5) at the feed position (9) is in addition monitored with reference to a smaller time range (E, F), which is within the predetermined time interval (A, B) and corresponds to the optimum sheet arrival, and the sheet advance is regulated in dependence thereupon.

Description

Die Erfindung betrifft ein Verfahren zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material am Einlaß von bogenverarbeitenden Maschinen, insbesondere Druckmaschinen, bei dem die Ankunft des Bogens an einer Anlagestelle durch Tastmittel innerhalb eines vorgegebenen Zeitintervalls festgestellt wird. Weiterhin bezieht sich die Erfindung auch auf eine Vorrichtung zur Durchführung eines solchen Verfahrens.The invention relates to a method for controlling the arrival of individually fed sheets of flexible material at the inlet of sheet-processing machines, in particular printing machines, in which the arrival of the sheet at a contact point is determined by means of scanning means within a predetermined time interval. Furthermore, the invention also relates to an apparatus for performing such a method.

Bei bogenverarbeitenden Maschinen, beispielsweise Offset-Druckmaschinen, in denen Papierbogen ein- oder mehrfarbig bedruckt werden, ist eine Anlegevorrichtung vorhanden, welche die einzelnen Bogen der Maschine zuführt, so daß sie innerhalb eines vorgegebenen Zeitintervalls an einer Anlagestelle in der Nähe des Maschinen-Einlasses ankommen und von da durch Greiferglieder od. dgl. in.die Maschine eingegeben werden können. Die Zuführung der Bogen muß mit dem Maschinentakt, d. h. der Umlaufgeschwindigkeit bogenführender Walzen synchronisiert sein. Ein außerhalb des vorgegebenen Zeitintervalls, also zu früh oder zu spät ankommender Bogen, würde zu Störungen im Produktionsablauf führen.In sheet-processing machines, for example offset printing machines, in which paper sheets are printed in one or more colors, there is an application device which feeds the individual sheets to the machine, so that they arrive at a contact point near the machine inlet within a predetermined time interval and from there the gripper links or the like can be entered into the machine. The feeding of the sheets must be done with the machine cycle, i.e. H. be synchronized with the rotational speed of sheet-guiding rollers. A sheet arriving outside the specified time interval, i.e. too early or too late, would lead to disruptions in the production process.

Es ist daher bekannt, die Ankunft der einzelnen Bogen an der - Anlagestelle beispielsweise durch elektrooptische Tastmittel (Reflexlichtschranken) daraufhin zu überwachen, ob sie im vorgegebenen Zeitintervall, d. h. innerhalb eines vorgegebenen Drehwinkelbereichs einer Maschinenwalze liegt. Fällt die Bogenankunft außerhalb dieses Toleranzbereiches, wird die Maschine automatisch abgestellt.It is therefore known to monitor the arrival of the individual sheets at the contact point, for example by means of electro-optical scanning means (reflective light barriers), to determine whether they are in the predetermined time interval, ie. H. is within a predetermined angle of rotation range of a machine roller. If the sheet arrival falls outside this tolerance range, the machine is switched off automatically.

Die Synchronisation zwischen Anlegevorrichtung und bogenverarbeitender Maschine ist vom Maschinenhersteller fest eingestellt. Fällt die Bogenankunft außerhalb des vorerwähnten Toleranzbereiches, so muß beispielsweise durch Blasluftänderung oder Verstellung der Anlegevorrichtung der Bogenlauf manuell korrigiert werden, wobei es in der Regel keinen Anhalt für die Veränderung der betreffenden Stellgröße gibt. Man ist daher weitgehend auf die Empirie angewiesen, d. h. es verstreicht oft eine lange Zeit, bis die veränderlichen Stellgrößen so eingestellt sind, daß bogenverarbeitende Maschine und Anlegevorrichtung wieder im richtigen Takt arbeiten.The machine manufacturer has set the synchronization between the feeder and the sheet-processing machine. If the sheet arrival falls outside the aforementioned tolerance range, the sheet travel must be corrected manually, for example by changing the blown air or by adjusting the application device, and there is generally no reason to change the manipulated variable in question. One is therefore largely dependent on empiricism. H. it often takes a long time until the variable manipulated variables are set so that the sheet-processing machine and feeder work again in the correct cycle.

Es ist Aufgabe der Erfindung, ein Verfahren und eine Vorrichtung zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material am Einlaß von bogenverarbeitenden Maschinen, insbesondere Druckmaschinen, anzugeben, wodurch die Steuerung der Bogenankunft verfeinert und Stillstandszeiten der Maschine vermieden werden können.It is an object of the invention to provide a method and a device for controlling the arrival of individually fed sheets of flexible material at the inlet of sheet processing machines, in particular printing machines, whereby the control of the sheet arrival can be refined and downtimes of the machine can be avoided.

Die Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Ankunft des Bogens an der Anlagestelle zusätzlich noch mit Bezug auf einen kleineren, innerhalb des vorgegebenen Zeitintervalls gelegenen, der optimalen Bogenankunft entsprechenden Zeitbereiches überwacht und in Abhängigkeit hiervon der Bogenvorschub geregelt wird.The object is achieved according to the invention in that the arrival of the sheet at the contact point is additionally monitored with reference to a smaller time range, which corresponds to the optimum sheet arrival, and corresponds to the sheet advance depending on this is regulated.

Bei einer Vorrichtung zur Durchführung dieses Verfahrens ist erfindungsgemäß vorgesehen, daß ein die optimale Ankunft anzeigender Signalgeber vorgesehen ist, dessen Ausgangssignal eine manuelle oder automatische Nachstellung des Bogenvorschubs auslöst.In a device for carrying out this method, it is provided according to the invention that a signal transmitter indicating the optimal arrival is provided, the output signal of which triggers a manual or automatic readjustment of the sheet feed.

Die nachstehende Beschreibung eines Ausführungsbeispiels dient im Zusammenhang mit beiliegender Zeichnung der weiteren Erläuterung der Erfindung. Es zeigen:

  • Fig. 1 schematisch eine Anlegevorrichtung, welche Papierbogen einer am Einlaß einer Druckmaschine angeordneten, elektrooptisch überwachten Anlagestelle zuführt;
  • Fig. 2 ein die grobe Bogenüberwachung und Ankunfts-' steuerung schematisch wiedergebendes Schaubild;
  • Fig. 3 ein schematisches Schaubild für eine verfeinerte Bogenankunftssteuerung und
  • Fig. 4 schematisch eine verfeinerte Bogenankunftssteuerung an einer Maschinenwalze.
The following description of an embodiment serves in conjunction with the accompanying drawing to further explain the invention. Show it:
  • Figure 1 shows schematically a feeder which feeds paper sheets to an electro-optically monitored contact point arranged at the inlet of a printing press;
  • Fig. 2 is a coarse sheet monitoring and arrival 'control schematically imaging graph;
  • Fig. 3 is a schematic diagram for a refined sheet arrival control and
  • Fig. 4 schematically shows a refined sheet arrival control on a machine roll.

Bei der in Fig. 1 schematisch dargestellten Anlegevorrichtung 1 ruht ein Stapel 2 aus zu bedruckenden Papierbogen auf einer Plattform 3 auf, die in Richtung des Pfeiles 4 anhebbar ist, so daß sich bei kontinuierlicher Abnahme der Bogen vom Stapel der oberste Bogen 5 im wesentlichen immer in der gleichen Höhe befindet. Eine an sich bekannte, beispielsweise mit Saugköpfen 6 ausgerüstete überführungseinrichtung 7 überführt die jeweils obersten Bogen 5 auf einen schrägen Vorschubtisch 8, auf dem sie unter teilweiser Überlappung bis zu einem an der Vorderkante des Tisches 8 angeordneten Anschlag 9 vorwandern. Die Ankunft eines Bogens 5 wird, beispielsweise in einem kleinen Spalt zwischen Vorderkante des Tisches 8 und-Anschlag 9 durch eine aus zwei oder mehr, elektrooptischen Reflextastern bestehende Lichtschranke 1o abgefühlt.1, a stack 2 of sheets of paper to be printed rests on a platform 3 which can be raised in the direction of arrow 4, so that the top sheet 5 is essentially always removed when the sheets are continuously removed from the stack in the same Height. A transfer device 7 known per se, for example equipped with suction heads 6, transfers the top sheets 5 in each case to an inclined feed table 8, on which they advance with partial overlap up to a stop 9 arranged on the front edge of the table 8. The arrival of a sheet 5 is sensed, for example in a small gap between the front edge of the table 8 and stop 9, by a light barrier 1o consisting of two or more electro-optical reflex sensors.

Hinter dem eine Anlagestelle für die Bogen 5 bildenden Anschlag 9 liegt der Einlaß einer Druckmaschine, von der in Fig. 1 lediglich.eine Walze 11 ganz und eine weitere Walze 12 teilweise dargestellt sind. Die Walzen 11, 12 laufen in Richtung der Pfeile 13 mit gleichmäßiger Geschwindigkeit um. Auf der Walze 11 sind an sich bekannte Greifer 14 angeordnet, welche .die an der Anlagestelle angekommenen Bogen 5 erfassen und in die Maschine einführen, nachdem vorher der Anschlag 9 im richtigen Zeitpunkt automatisch außerweges bewegt worden ist. Nach Einzug des Bogens 5 in die Maschine kehrt der Anschlag 5 in seine Ausgangslage zurück. Die Bewegung des Anschlages 9 erfolgt in Richtung des Doppelpfeiles 15.Behind the stop 9 forming a contact point for the sheets 5 is the inlet of a printing press, of which only one roller 11 and another roller 12 are partially shown in FIG. 1. The rollers 11, 12 rotate in the direction of the arrows 13 at a constant speed. Known grippers 14 are arranged on the roller 11, which grasp the sheets 5 that have arrived at the contact point and insert them into the machine after the stop 9 has previously been automatically moved out of the way at the right time. After the sheet 5 has been drawn into the machine, the stop 5 returns to its starting position. The movement of the stop 9 takes place in the direction of the double arrow 15.

Offensichtlich kann ein Bogen 5 vom Greifer 14 nur dann erfaßt werden, wenn zwischen den durch die Anlegevorrichtung 1 zugeführten und vorgeschobenen Bogen und der umlaufenden Walze 11 eine Synchronisation in der Weise hergestellt ist, daß ein Bogen 5 immer dann an der Anlagestelle vorhanden ist, wenn sich der Greifer 14 innerhalb eines bestimmten Drehwinkelbereiches in der Nähe der Anlagestelle befindet.Obviously, a sheet 5 can only be gripped by the gripper 14 if synchronization is established between the sheet fed and fed by the application device 1 and the rotating roller 11 in such a way that a sheet 5 is always present at the contact point when the gripper 14 is within a certain range of rotation angle in the vicinity of the contact point.

Dieser Drehwinkelbereich entspricht einem bestimmten Zeitintervall, welches in Fig. 2 durch die Strecke zwischen A und B dargestellt ist. Bei herkömmlichen bogenfuhrenden Maschinen sind elektrische Schalteinrichtungen vorgesehen, welche einen das vorgegebene Zeitintervall zwischen A und B erfassenden Drehwinkelgeber einschließen, der mit der Lichtschranke 1o so zusammenwirkt, daß stets feststellbar ist, ob im Zeitintervall A, B ein Bogen ordnungsgemäß am Anschlag 9 anliegt. Ist dies nicht der Fall, wird die Maschine automatisch abgeschaltet.This rotation angle range corresponds to a certain time interval, which is shown in FIG. 2 by the distance between A and B. In conventional sheet-guiding machines, electrical switching devices are provided which include a rotary angle sensor which detects the predetermined time interval between A and B and which cooperates with the light barrier 1o in such a way that it can always be ascertained whether a sheet is properly in contact with the stop 9 in the time interval A, B. If this is not the case, the machine is switched off automatically.

Die optimale Bogenankunft liegt etwa in der Mitte des Zeitintervalls-A, B und ist in Fig. 3 durch den wesentlich kleineren, innerhalb des Intervalls A, B gelegenen Zeitbereich E, F repräsentiert. Erfindungsgemäß wird die in diesem Zeitbereich E, F gelegene Bogenankunft zusätzlich überwacht und in Abhängigkeit hiervon der Bogenvorschub bereits an der Anlegevorrichtung 1 entsprechend geregelt. Der Erfindungsgedanke besteht also darin, nicht zu warten,bis die Bogenankunft außerhalb des vorgegebenen Zeitintervalls A, B fällt und damit die Maschine zum Stillstand gebracht wird sondern zusätzlich innerhalb des Intervalls A, B eine Überwachung vorzunehmen und hierdurch ein Herausfallen der Bogenankunft durch entsprechende Justierungen, beispielsweise an der Anlegevorrichtung 1, zu verhindern, so daß es gar nicht erst zu einem Abschalten der Maschine und einem damit verbundenem Produktionsausfall kommen kann.The optimal arrival of the bow lies approximately in the middle of the time interval A, B and is represented in FIG. 3 by the substantially smaller time range E, F located within the interval A, B. According to the invention, the sheet arrival located in this time range E, F is additionally monitored and, depending on this, the sheet advance is already regulated accordingly at the application device 1. The idea of the invention is therefore not to wait until the sheet arrival falls outside the predetermined time interval A, B and the machine is brought to a standstill, but also to monitor within the interval A, B and thereby prevent the sheet arrival from falling out by appropriate adjustments, For example, to prevent the application device 1, so that it is not possible to switch off the machine and a related loss of production.

Fig. 4 zeigt vergrößert noch einmal die in Richtung des Pfeiles 13 umlaufende Walze 11 mit dem Greifer 14. Die Markierungen A und B geben den Drehbereich oder das diesem entsprechende Zeitintervall an, innerhalb dessen ein Bogen 5 vom Greifer 14 . erfaßt und in die Maschine eingezogen werden kann. Innerhalb dieses Zeitintervalls muß ein Bogen am Anschlag 9 angekommen und ordnungsgemäß angelegt sein, was durch die Lichtschranke 10 im Zusammenhang mit einem das Zeitintervall A, B signalisierenden Schaltglied erfolgt. Erfindungsgemäß wird nun der Lichtschranke 1o ein weiteres, die optimale Bogenankunft signalisierendes Schaltglied zugeordnet, welches in Fig. 4 schematisch durch einen Mikroschalter 16 und eine diesen betätigende, an der Welle 17 der Walze 11 angeordnete Nocke 18 repräsentiert ist. Diese als Drehwinkelgeber funktionierende Anordnung liefert ein den Zeitbereich E, F, also der optimalen Bogenankunft zugeordnetes Signal, welches im Verein mit der Lichtschranke 1o in bekannter Weise dazu ausgenutzt wird, in einer elektrischen Vergleichsschaltung festzustellen, ob die Bogenankunft zu früh erfolgt, also vor dem Zeitpunkt E liegt, ob die Bogenankunft richtig im Zeitbereich zwischen E und F liegt, oder ob der Bogen zu spät kommt, also nach dem Zeitpunkt F am Anschlag 9 ankommt.Fig. 4 shows again enlarged the roller 11 rotating in the direction of arrow 13 with the gripper 14. The markings A and B indicate the range of rotation or the corresponding one Time interval within which an arc 5 from the gripper 14. can be detected and drawn into the machine. Within this time interval, an arc on the stop 9 must be received and applied correctly, which is done by the light barrier 1 0 in connection with a time interval A, B signaling switching element. According to the invention, the light barrier 10 is now assigned a further switching element which signals the optimal arrival of the bow, which is represented schematically in FIG. 4 by a microswitch 16 and a cam 18 which actuates the latter and is arranged on the shaft 17 of the roller 11. This arrangement, which functions as a rotation angle transmitter, supplies a signal associated with the time range E, F, i.e. the optimal arrival of the bow, which is used in conjunction with the light barrier 10o in a known manner to determine in an electrical comparison circuit whether the arrival of the bow is too early, i.e. before Time E is whether the sheet arrival is correctly in the time range between E and F, or whether the sheet arrives too late, ie arrives at stop 9 after time F.

Diese drei Möglichkeiten können nun in einfacher Weise, beispielsweise durch drei Lampen oder Leuchtdioden an der Maschine zur visuellen Darstellung gebracht werden, so daß dann beispielsweise manuell eine entsprechende Nachregelung des Bogenvorschubs durch Neueinstellung der betreffenden Stellgrößen an der Anlegevorrichtung vorgenommen werden kann. Als Ergebnis dieser Nachregelung verbleibt die Bogenankunft immer im optimalen Zeitbereich E, F, sie fällt also nie außerhalb des vorgegebenen Zeitintervalls A, B, so daß die Maschine nicht mehr abschaltet.These three options can now be brought to the visual display in a simple manner, for example by means of three lamps or light-emitting diodes on the machine, so that, for example, a corresponding readjustment of the sheet feed can then be carried out manually by re-adjusting the relevant manipulated variables on the application device. As a result of this readjustment, the sheet arrival always remains in the optimal time range E, F, so it never falls outside the predetermined time interval A, B, so that the machine no longer switches off.

Die Korrektur und Nachregelung des Bogenvorschubs kann mit Hilfe des beschriebenen Verfahrens auch automatisch vorgenommen werden. Wird eine der oben genannten, drei Möglichkeiten signalisiert, so kann durch einfache Schaltmittel ein Verstellmotor der Anlegevorrichtung 1 für eine bestimmte Zeit den Befehl erhalten, vorwärts oder rückwärts zu drehen, bis die Bogenankunft wieder in den optimalen Zeitbereich E, F fällt.The correction and readjustment of the sheet feed can also be carried out automatically using the described method. If one of the three options mentioned above is signaled, a simple adjustment means can be used to give an adjusting motor of the application device 1 the command to rotate forwards or backwards for a certain time until the sheet arrival again falls within the optimal time range E, F.

Um eine Nachregelung zu vermeiden, wenn zufällig nur ein einzelner Bogen nicht ordnungsgemäß ankommt und anliegt, kann auch vorgesehen werden, daß ein in an sich bekannter Weise in die der Maschine zugeordnete Schaltanordnung eingebauter Zähler die Anzahl der zu früh oder zu spät ankommenden Bogen summiert und einen Verstellbefehl erst dann auslöst, wenn eine bestimmte Anzahl nacheinander ankommender Bogen, beispielsweise drei Bogen bezüglich ihrer Ankunftszeit nicht-ordnungsgemäß in den Bereich E, F fallen.In order to avoid readjustment when, by chance, only a single sheet does not arrive properly and is present, it can also be provided that a counter built into the switching arrangement assigned to the machine in a manner known per se adds up the number of sheets arriving too early or too late and triggers an adjustment command only when a certain number of sheets arriving in succession, for example three sheets, fall incorrectly in the range E, F with regard to their arrival time.

Die beschriebene Anordnung gemäß der Erfindung hat den Vorteil, daß ein zusätzlicher Einbau von Meßeinrichtungen oder Meßfühlern in Gestalt von Lichtschranken 10 od. dgl. nicht erforderlich ist. Es genügt lediglich, den durch die Teile 16 und 18 repräsentierten, den Zeitbereich E, F abfragenden Drehwinkelgeber zusätzlich einzubauen, um eine manuelle oder automatische Korrektur der Anlegevorrichtung 1 durchzuführen. Da der Zeitbereich E, F bei bekannten Maschinen nicht abgefühlt und zur Steuerung nicht ausgenutzt wurde, war es bisher überhaupt nicht möglich, die optimale Bogenankunft mit Bezug auf den Drehwinkel der Walze 11 zu erkennen und entsprechende Korrekturen an der Anlegevorrichtung durchzuführen.The arrangement according to the invention described has the advantage that an additional installation of measuring devices or sensors in the form of light barriers 1 0 od. Like. Is not required. It is sufficient to additionally install the rotary angle sensor represented by the parts 16 and 18, which interrogates the time range E, F, in order to carry out a manual or automatic correction of the application device 1. Since the time range E, F was not sensed in known machines and was not used for control purposes, it has so far not been possible at all to recognize the optimal arrival of the sheet with reference to the angle of rotation of the roller 11 and to make corresponding corrections to the application device.

Insgesamt ermöglicht es die Erfindung also, daß die Anlegevorrichtung 1 unabhängig von Maschinengeschwindigkeit, Beschaffenheit der vorzuschiebenden Bogen 5 und deren Oberfläche stets optimal - gegebenenfalls auch durch Fernbedienung - eingestellt werden kann, so daß Stillstandszeiten der Maschine vermeidbar sind. Eine höhere Maschinengeschwindigkeit (Druckgeschwindigkeit) und größere Maschinenleistung bei verhältnismäßig geringem, zusätzlichem Aufwand ist hierdurch ermöglicht.Overall, the invention thus makes it possible that the application device 1 can always be optimally adjusted, possibly also by remote control, regardless of the machine speed, the nature of the sheets 5 to be fed and their surface, so that downtimes of the machine can be avoided. This enables a higher machine speed (printing speed) and greater machine performance with relatively little additional effort.

Das erfindungsgemäße Regel- oder Steuerprinzip ist im übrigen nicht auf eine Überwachung der Ankunft einzelner Bogen beschränkt. In analoger Weise ermöglicht dieses Prinzip beispielsweise auch eine Anlege-Register-Kontrolle bei einer Druckmaschine od. dgl. zugeführten Bogen. Auch dort ist ein größerer, der genauen Bogenanlage und/oder Bogenausrichtung ,zugeordneter, von einer Lichtschranke od. dgl. abgetasteter .Meßbereich vorgesehen. Liegt ein Bogen kurz vor seinem Einzug in die Maschine außerhalb dieses Meßbereiches, wird die Maschine abgeschaltet. Erfindungsgemäß wird nun, beispielsweise durch eine zweite, in Fig. 1 mit dem Bezugszeichen 2o bezeichnete Reflexlichtschranke noch ein kleinerer Meßbereich abgetastet und mit den anliegenden und ausrichtenden Bogen in Beziehung gebracht. Der größere Meßbereich kann beispielsweise 1 bis 2 mm betragen. Der genauere, von der Lichtschranke 2o abgetastete Meßbereich kann kleiner als 1/1o mm sein. Durch ständige Überwachung der Bogen in diesem kleinen Meßbereich und entsprechende Nachregulierung der verantwortlichen Stellgrößen kann dann ohne Abschaltung der Maschine ein ordnungsgemäßer Bogeneinzug gewährleistet werden. Auch bei dieser Anordnung kann die Abfragung der verschiedenen Meßbereich zu verschiedenen Zeitpunkten erfolgen. Die Vorteile dieser Anordnung liegen wiederum darin, daß rechtzeitig Maßnahmen zur Behebung von Anlege- und/oder Registerfehlern eingeleitet werden können, daß ständig eine Aussage über die Anlegequalität der verarbeiteten Bogen möglich ist und daß eine höhere Druckgeschwindigkeit durch bessere Maschineneinstellung erreichbar ist.The rule or control principle according to the invention is otherwise not limited to monitoring the arrival of individual sheets. In an analogous manner, this principle also enables, for example, an application register check on a printing press or the like supplied sheet. There, too, there is a larger measuring area assigned to the precise sheet arrangement and / or sheet alignment, which is scanned by a light barrier or the like. If a sheet is outside this measuring range shortly before it is fed into the machine, the machine is switched off. According to the invention, a smaller measuring range is now scanned, for example by a second reflection light barrier, which is denoted by the reference numeral 20 in FIG. 1, and is brought into relation with the adjacent and aligning sheets. The larger measuring range can be, for example, 1 to 2 mm. The more precise measuring range scanned by the light barrier 2o can be less than 1/10 mm. Continuous monitoring of the sheets in this small measuring range and corresponding readjustment of the relevant manipulated variables can then ensure proper sheet feeding without switching off the machine. With this arrangement, too, the different measuring ranges can be interrogated at different times. The advantages of this arrangement are that measures are taken in good time Correction of application and / or register errors can be initiated, that a constant statement about the application quality of the processed sheets is possible and that a higher printing speed can be achieved through better machine settings.

Claims (3)

1. Verfahren zum Steuern der Ankunft einzeln vorgeschobener Bogen aus biegsamem Material am Einlaß von bogenverarbeitenden Maschinen, insbesondere Druckmaschinen, bei dem die Ankunft des Bogens an einer Anlagestelle durch Tastmittel innerhalb eines vorgegebenen Zeitintervalls festgestellt wird, dadurch gekennzeichnet , daß die Ankunft des Bogens .(5) an der Anlagestelle (9) zusätzlich noch mit Bezug auf einen kleineren, innerhalb des vorgegebenen Zeitintervalls (A,B) gelegenen, der optimalen Bogenankunft entsprechenden Zeitbereiches (3,F) überwacht und in Abhängigkeit hiervon der Bogenvorschub geregelt wird.1. A method for controlling the arrival of individually fed sheets of flexible material at the inlet of sheet-processing machines, in particular printing machines, in which the arrival of the sheet at a contact point is determined by touch means within a predetermined time interval, characterized in that the arrival of the sheet. ( 5) at the attachment point (9) additionally with reference to a smaller, within the predetermined time interval (A, B), the optimal sheet arrival corresponding time range (3, F) is monitored and the sheet feed is regulated depending on this. 2. Vorrichtung zur Durchführung des Verfahrens nach Anspruch 1, dadurch gekennzeichnet, daß ein die optimale Ankunft anzeigender Signalgeber (10,18) vorgesehen ist, dessen Ausgangssignal eine manuelle oder automatische Nachstellung des Bogenvorschubs auslöst.2. Device for carrying out the method according to claim 1, characterized in that a signal generator (1 0 , 18) indicating the optimal arrival is provided, the output signal of which triggers a manual or automatic readjustment of the sheet feed. 3. Vorrichtung nach Anspruch 2, dadurch gekennzeichnet, daß der Signalgeber einen elektrischen Schalter (16) umfaßt, der von einer umlaufenden Welle (17) der Maschine betätigt ist.3. Apparatus according to claim 2, characterized in that the signal transmitter comprises an electrical switch (16) which is actuated by a rotating shaft (17) of the machine.
EP19810106449 1980-09-09 1981-08-19 Process and device to control the arrival of single pushed on sheets of flexible material Expired EP0047413B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803033780 DE3033780A1 (en) 1980-09-09 1980-09-09 METHOD AND DEVICE FOR CONTROLLING THE ARRIVAL OF INDIVIDUALLY PUSHED BOWS OF BENDING MATERIAL
DE3033780 1980-09-09

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EP0047413A1 true EP0047413A1 (en) 1982-03-17
EP0047413B1 EP0047413B1 (en) 1984-11-07

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JP (1) JPS5787368A (en)
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US4771690A (en) * 1987-04-24 1988-09-20 Ernst W. Dorn Company, Inc. Screen printing apparatus for limited flexibility stock
EP0437813A2 (en) 1990-01-17 1991-07-24 Heidelberger Druckmaschinen Aktiengesellschaft Control-device for the feeding device in a sheet-processing machine, particularly for printing machine

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DE3301722C2 (en) 1983-01-20 1985-03-07 Heidelberger Druckmaschinen Ag, 6900 Heidelberg Method and device for the correct feeding of sheets to sheet processing machines
JPS63160843A (en) * 1986-12-25 1988-07-04 Komori Printing Mach Co Ltd Alarm device for paper flow in printer
JP2594427B2 (en) * 1986-12-25 1997-03-26 株式会社小森コーポレーション Paper flow alarm for printing machines
DE3842390C3 (en) * 1988-12-16 2001-11-29 Roland Man Druckmasch Control device
US5056771A (en) * 1989-08-25 1991-10-15 Lexmark International, Inc. Apparatus for controlling interpage gaps in printers and method of interpage gap control
DE4140051C2 (en) * 1991-12-05 1996-11-07 Leuze Electronic Gmbh & Co Device for monitoring the arrival of sheets at the inlet of sheet processing machines
DE10112946A1 (en) * 2001-03-17 2002-09-26 Nexpress Solutions Llc Method and device for recognizing the presence of an object, preferably a sheet or sheet-shaped object for printing
JP2008006632A (en) * 2006-06-28 2008-01-17 Komori Corp Paper feeding adjusting device and method

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DE2202851C3 (en) * 1972-01-21 1981-04-23 Weitmann & Konrad GmbH & Co KG, 7023 Echterdingen Control device for automatic print adjustment and later infeed and feed control in sheet-guiding printing machines

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4771690A (en) * 1987-04-24 1988-09-20 Ernst W. Dorn Company, Inc. Screen printing apparatus for limited flexibility stock
EP0437813A2 (en) 1990-01-17 1991-07-24 Heidelberger Druckmaschinen Aktiengesellschaft Control-device for the feeding device in a sheet-processing machine, particularly for printing machine
EP0437813A3 (en) * 1990-01-17 1991-10-23 Heidelberger Druckmaschinen Aktiengesellschaft Control-device for the feeding device in a sheet-processing machine, particularly for printing machine
US5096183A (en) * 1990-01-17 1992-03-17 Heidelberger Druckmaschinen Ag System for controlling sheet feed in sheet-processing machines, particularly printing presses

Also Published As

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EP0047413B1 (en) 1984-11-07
DE3033780A1 (en) 1982-04-22
DE3033780C2 (en) 1989-06-29
JPS5787368A (en) 1982-05-31

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