DE1574447C3

DE1574447C3 -

Info

Publication number: DE1574447C3
Application number: DE19671574447
Authority: DE
Priority date: 1967-12-30
Filing date: 1967-12-30
Publication date: 1976-09-02

Description

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reflex von der Reflexmarke erhalten, auch wenn der Strahlengang der Reflexionslichtschranke nicht genau senkrecht auf die Oberfläche der Reflexmarke trifft. Dies kann z. B. auftreten, wenn die Stirnseite der Ersatzrolle, die die Reflexmarke trägt, nicht genau eben ist. Bei einer Unebenheit in der Nähe des Strahleneinfallpunktcs wird sonst unter Umständen der Strahl in einer falschen Richtung zurückgeworfen.reflex received from the reflex mark, even if the beam path of the photoelectric retro-reflective sensor is not accurate hits the surface of the reflective mark perpendicularly. This can e.g. B. occur when the face of the replacement roll, that bears the reflective mark is not exactly level. If there is a bump in the vicinity of the point of incidence of the rays Otherwise the beam may be thrown back in the wrong direction.

Die mit der Erfindung erzielten Vorteile bestehen insbesondere darin: Der Bürstenaufsetzpunkt kann, auf den Rollenumfang bezogen, exakt vorbestimmt werden und damit auch der Messereinsatzpunkt.The advantages achieved with the invention are in particular: The brush attachment point can, on related to the circumference of the roll, precisely predetermined and thus also the point of use of the knife.

Die Länge der abgeschnittenen Klebespitze ist bei allen Produktionsgeschwindigkeiten nahezu gleich lang. Das wirkt sich förderlich auf die Aussortierung der durch den Anklebevorgang entstehenden Makulatur aus, die aus einem geschuppten Strom von bedruckten Exemplaren ausgeschieden werden muß. Durch die Anwendung von Reflektoren mit einem hohen Reflexionsfaktor ist es möglich, die Unfallsicherheit des Systems zu erhöhen. Denn selbst bei versehentlichem Einschalten der Rollenwechseleinrichtung ohne eingehängte Rolle ist es nicht möglich, durch das Eintreten z. B. eines Menschen in den reflektierten Lichtstrahl, die Folgesteuerung von Bürste und Messer auszulösen. In der Zeichnung ist eine Ausführungsform der Erfindung veranschaulicht. Es zeigtThe length of the cut glue tip is almost the same at all production speeds long. This has a beneficial effect on the sorting out of the waste resulting from the gluing process that has to be separated from a shingled stream of printed copies. Through the Use of reflectors with a high reflection factor makes it possible to make the system more accident-proof to increase. Because even if the roll changing device is accidentally switched on without it being attached Role it is not possible by entering z. B. of a person in the reflected light beam, trigger the sequence control of the brush and knife. In the drawing is an embodiment of the invention illustrated. It shows

F i g. 1 die Stirnansicht einer Rollenwechseleinrichtung in Anklebestellung,F i g. 1 the front view of a roll changing device in the glued-on position,

I F i g. 2 die Draufsicht auf eine Ersatzrolle.I F i g. 2 is a top view of a replacement roll.

j Von einer auslaufenden Papierrolle 1 gelangt einej From a running out paper roll 1 comes a

Papierbahn 2 zur Rollenrotationsdruckmaschine. Eine Ersatzrolle 3 mit Klebestellen 5 ist in der Stellung dargestellt, in der der Anklebevorgang erfolgen kann. In dieser Stellung hat sie einen Strahlengang 7 zwischen einer Reflexionslichtschranke 9 und einer ortsfesten Reflexmarke 13 unterbrochen, wodurch ein Zeitglied der Steuerelektrik eingeschaltet und das Anschwenken eines eine Klebebürste 10 und ein Trennmesser 11 tragenden Schwenkrahmens in die Arbeitsstellung bewirkt wird. Auf einer Stirnseite 4 der Ersatzrolle 3 befindet sich eine Reflexmarke 6. Diese ist mit einer Oberfläche ausgestattet, die eine Streuwirkung erzielt, so daß auch bei Unebenheit der Stirnfläche der Ersatzrolle 3 ein Teil des Strahles der Reflexionslichtschranke 9 in ihre Fotozelle zurückgeworfen wird. Nach Abschalten eines in der zugehörigen Steuerelektrik angeordneten Zeitgliedes wird ein Rollenstern 14 in seiner Drehung angehalten, so daß die Reflexmarke 6 den Strahlengang 7 der an einem Gestell 8 befestigten Reflexionslichtschranke 9 durchläuft.Paper web 2 for the web-fed rotary printing press. A replacement roll 3 with glue points 5 is shown in the position in which the gluing process can take place. In this position it has a beam path 7 between a reflective light barrier 9 and a fixed reflective mark 13 interrupted, whereby a timer the control electronics switched on and the pivoting of an adhesive brush 10 and a cutting knife 11 carrying Swivel frame is effected in the working position. The replacement roll 3 is located on one end face 4 a reflective mark 6. This is equipped with a surface that achieves a scattering effect, so that even if the end face of the replacement roller 3 is uneven, part of the beam from the reflective light barrier 9 is thrown back into its photocell. After switching off one arranged in the associated control electronics Timing element is a roller star 14 stopped in its rotation, so that the reflective mark 6 the Beam path 7 of the reflective light barrier 9 attached to a frame 8 passes through.

Nach Beendigung der Anstellbewegung des Schwenkrahmens für die Klebebürste 10 und das Trennmesser 11 wird beim folgenden Durchlauf der Reflexmarke 6 die Klebebürste 10 gegen die Ersatzrol-Ie 3 bewegt und beim anschließenden weiteren Durchlauf das Kommando für das Trennmesser 11 gegeben und damit die Papierbahn 2 der auslaufenden Papierrolle 1 abgetrennt. Die Länge der Restbahn kann durch Ändern eines durch die Klebestelle 5 und die Position der Reflexmarke 6 gebildeten Winkels 12 variiert werden. After completion of the adjustment movement of the swivel frame for the adhesive brush 10 and the Separating knife 11 is the following passage of the reflective mark 6, the adhesive brush 10 against the replacement roller 3 moves and the command for the cutting knife 11 is given in the subsequent further pass and thus the paper web 2 of the expiring paper roll 1 is severed. The length of the remaining track can be through Changing an angle 12 formed by the glue point 5 and the position of the reflective mark 6 can be varied.

Hierzu 1 Blatt Zeichnungen1 sheet of drawings

Claims

Patent claims:

1. Device for controlling the movement of the adhesive brush and the cutting knife in the automatic Connect the end of the web of an expiring paper roll to the beginning of a replacement roll in paper roll changing units with a star wheel, with one opposite the one bearing a reflective mark first end face of the replacement roll arranged immovable reflective light barrier with at least beam path running approximately perpendicular to the end faces of the replacement role, in the case of which Interruption by the replacement role a timer to end the star rotation with the distance The delay interval derived from the reflective mark on the roller surface is switched on and at the same time a signal for pivoting one of the adhesive brushes and the separating knife Swivel frame given in the ready position and when it is changed by the reflective mark a control pulse with regard to the luminous flux falling on the photoelectric cell of the photoelectric retro-reflective sensor for releasing the adhesive brush and the cutting knife, according to the DT patent 14 99 127, characterized in that the first time it passes the replacement roll (3) attached reflective mark (6) on the reflective light barrier (9) the control pulse for the adhesive brush (10) and the control pulse for the cutting knife (11) is triggered the next time it passes.

2. Apparatus according to claim 1, characterized in that the attached to the replacement roller (3) Reflective mark (6) is equipped with a surface that diffuses the incident light achieved.

The invention relates to a device for controlling the movement of the adhesive brush and the cutting knife when the end of the web of a running paper roll is automatically connected to the beginning of the web a replacement roll in paper roll change units with a star wheel, with a reflective mark opposite the one bearing first end face of the replacement roll arranged immovable reflective light barrier with at least beam path running approximately perpendicular to the end faces of the replacement roll when it is interrupted the replacement roller provides a timer for ending the roller star rotation with a delay interval derived from the distance between the reflective mark and the roller surface switched on and at the same time a signal to swivel one of the adhesive brush and the swivel frame carrying the cutting knife is placed in the ready position, and when it is changed through the reflective mark with regard to the luminous flux falling on the photoelectric cell of the photoelectric retro-reflective sensor a control pulse for triggering the adhesive brush and the cutting knife is generated, according to the DT patent 14 99 127.

With such a device, a replacement roller and thus the one attached to its first end face can be replaced optical mark (reflective mark) safely in the beam path of an immovable reflective light barrier bring. The evaluable signal generated by the photoelectric retro-reflective sensor can be used in conjunction with a

Ren timing element can be used to / .. B. trigger the brush or knife movement. The stare Timers are switching delay means with a fixed time value, the time of which is to expire begins as soon as they are aroused. Here, the excitation time z. B. be the moment in which the reflective mark attached to the face of the replacement roll the light beam of the reflective light barrier fully reflected.

From US-PS 26 21 865 it is known, the line of action of a pivotable photocell about an axis alternately to align to the beam paths of two different lamps. In one case the Lamp beam directly into the photocell. He is through the one located on the roller star and on the roll moving towards the gluing position is interrupted, the star rotation of the rolls is stopped. The photocell is then transferred from the swivel frame into the light beam path reflected from the roller side a second lamp swiveled. On this side of the roll is a darker one, i.e. one that does not reflect much light Mark attached in such a way that when the roller is rotated about its longitudinal axis, the impact surface of the incident Light beam comes to lie within the area of the dark mark. At this moment the The reflected light beam was so weak that the photocell gave an impulse to trigger a command »Stick and disconnect «triggers. The device has the disadvantage, among other things, that the photocell is in closed-circuit current have to work.

Often, paper rolls that are not round have to be processed in web-fed rotary printing machines. One Out of round roll can be very difficult to get into an exact target waiting position with automatic roll star turning processes bring. That means that then unwieldy, wide, dark marks on the front side of the roll must be attached to ensure that the light beam actually hits the dark mark. With web-fed rotary printing presses, it is necessary to be able to set the page register. It happens in that the unwinding roll is displaced axially. Photoelectric retro-reflective sensors have one Working area with tight tolerance limits. Since the unwinding role, as I said, is moved axially must, it cannot be ruled out that the roll is aligned with the roll to be glued and in the waiting position The photocell lamp system works at least in its limit range. Operational safety is particularly at risk then, if, in addition, the new postponed role at the reflection barrier facing face is dirty, which often happens in practice.

The invention is based on the object with a single stationary, non-pivotable reflective barrier In addition to the positioning of the replacement roll, there is also the sequence control for triggering a subsequent one Movement of the adhesive brush and the cutting knife, whereby the movement of the The cutting knife is not linked to the movement of the adhesive brush via a rigid timing element.

The object is achieved by the features from the characterizing part of claim 1. This Features relate to a further development of the subject matter of the main patent.

The reflective mark attached to the replacement roll is expediently equipped with a surface that has a achieved a certain scattering effect of the incident light. As a result, the reflective light barrier can create a light