DE643400C

DE643400C - Pneumatic sheet feeder

Info

Publication number: DE643400C
Application number: DEST53087D
Authority: DE
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-02-03
Filing date: 1935-02-03
Publication date: 1937-04-06

Description

Die Erfindung betrifft einen Bogenanleger hoher Leistung zum Bilden und Fortführen einer Bahn von sich schuppenartig überdeckenden Bogen an die Anlegemarken einer Offsetmaschine, Falzmaschine ο. dgl.The invention relates to a high performance sheet feeder for forming and advancing a web of sheets overlapping in a scale-like manner to the positioning marks of an offset machine, folding machine ο. like

Die Erfindung wird dargestellt durch unter der Bogenbahn arbeitende Hilfsmittel, die zum Fortführen der von Saugern angehobenen Bogen aus endlos, paternosterartig angeordneten Band- oder Kettengreifern bestehen, die von vorn her der angehobenen und entgegenkommenden Bogenkante zustreben, sie ergreifen, an die Bogenbahn führen und so lange festhalten, bis die vordere Kante des Bogens den Punkt erreicht, wo die Fortführungsbänder tangential von der Rolle ab- und den Anlegetisch anlaufen, dort durch einen verstellbaren Anschlag nur einen kurzen Moment geöffnet werden, der genügt, den Bogen der Richtung der Fortführungsbänder folgen lassen zu können, daß immer mehrere Bogen unterwegs sind, die die Bogenbahn immer neu und dachziegelartig aufbauen.The invention is represented by tools working under the arcuate path, the to continue the sheets raised by suction cups from endless, paternoster-like arranged sheets Band or chain grippers are made from the front of the lifted and oncoming ones Strive towards the edge of the sheet, grasp it, guide it to the sheet path and hold on until the front edge of the Arc reaches the point where the continuation belts tangentially off the roll and approach the feed table, there only a short one by means of an adjustable stop The moment it is opened, the arc of the direction of the continuation belts is sufficient to be able to follow that there are always several arches on the way that form the arch path always build up anew and like a roof tile.

Bei einer bekannten Vorrichtung ähnlicher Art wird der nur an einer Ecke vom Stapel getrennte und aus der Laufrichtung gezogene Bogen von den umlaufenden Greifern einer Walze erfaßt. Dabei läuft der Greifer lediglich an der Bogenkante vorbei, und nach dem Schließen des Greifers läuft die Bogenkante dem Greifer hinterher. Es besteht die Gefahr, daß der nur an einer Ecke aufgehobene Bogen nicht sicher und genau von den Greifern erfaßt werden kann.In a known device of a similar type, the stack is only at one corner Separate sheets pulled out of the running direction by the rotating grippers one Roller detected. The gripper only runs past the edge of the sheet and after When the gripper closes, the sheet edge follows the gripper. There is a risk that the sheet, which was only picked up at one corner, was not safely and precisely from the grippers can be detected.

In Ermangelung kippbarer Sauger werden bei anderen Bogenvereinzelungsvorrichtungen die Bogen, bevor sie von dem schwingenden oder umlaufenden Sauger nach oben mitgenommen werden, entgegen der anschließenden Förderrichtung bewegt und hierbei angestaucht. Bei diesen Vorrichtungen handelt es sich aber nicht um das Bilden und Fördern einer Bahn von sich teilweise überdeckenden Bogen. Sie arbeiten auch nicht unterhalb einer Bogenbahn.In the absence of tiltable suction cups, other sheet separating devices the sheets before they are taken up by the swinging or rotating sucker are moved against the subsequent conveying direction and upset in the process. However, these devices are not concerned with the formation and conveyance of a web of partially overlapping ones Arc. They also do not work under an arched path.

Bei dem Gegenstande der Erfindung werden die Bogen nicht angestaucht, um das Vereinzeln der Bogen zu sichern, da bereits die kippbare, an sich bekannte Trenn- und Saugereinrichtung die Bogen sicher und einwandfrei getrennt hat, sondern es strebt eine mehrfache Anordnung von Greifern dem von der Trennvorrichtung gehaltenen und angehobenen Bogen geradlinig entgegen, ergreift ihn an seiner vorderen Kante und trägt ihn den Fortführungswalzen zu.In the subject matter of the invention, the sheets are not upset in order to Securing the separation of the bow, as the tiltable, known per se separating and Sucker device has separated the sheets safely and properly, but it is aiming for a multiple arrangement of grippers held and lifted by the separating device Straight towards the sheet, grabs it by its front edge and carries it to the continuation rollers.

Gegenüber den bekannten Vorrichtungen gestattet die Anordnung nach der Erfindung eine weit höhere Leistung bei weit geringeren Arbeitsgeschwindigkeiten und durch die direkte Zuführung der Bogen auf den Anlegetisch eine genaue und sichere Anlage sowie infolge der geringeren Arbeitsgeschwindigkeit einen erschütterungsfreien Betrieb. Die Greifer mit ihren Greif erkörpern gestatten eine blitzschnelle Umstellung auf jedes Bogenformat durch jede einfache Hilfskraft.Compared to the known devices, the arrangement according to the invention allows a far higher performance at far lower working speeds and due to the direct Feeding the sheets on the feed table an accurate and safe system as well as a result vibration-free operation due to the lower working speed. The gripper with their grippers allow a lightning-fast changeover to any sheet format by any simple helper.

Der Gegenstand der Erfindung ist bei-The subject matter of the invention is

Claims

for example shown and described in the drawing. Show it:
Fig. Ι an elevation and
Fig. 2 is a plan. 1'ί%

ι is the stack of paper, at its front »?. ' Edge adjacent to the straightening strips 2. D'iC The topmost sheets are loosened up by the blown air device 3. Above the stack ι works on its leading edge of the sheet

ίο suction rod 4 with its suction feet 5. The Shaft 6 carries the continuation rollers 7 and 8. These rollers 8 carry a pair of sprockets, on which the gripper chain 10 rotates. The chain is guided by a bracket 11 on which the rollers 12 of the chain 10 run. This chain is with a second one through the looper pin 13 connected, each of which carries a pair of tongues 14 and 15. It is through the Spring 16 held in the closed state.

This chain gripper is arranged once to the left and right of the stack. These Parts 7 and 8 carry the continuation belts 18. The pressure rollers 19 are of the Continuation roles 7 and 8 taken.

The mode of action is as follows:

The entire chain gripper 8 is left and right so on the shaft 6 with the Screw 20 found that his gripper pairs 14, 15 do not move the bow far from his Can take hold of ends. Between the gripper devices arranged on both sides it is advisable to place the belt rolls 7.

The sheet 21, which is sucked in, tilted or not tilted, lifted by the suction rod 12 is gripped towards each other by the pair of grippers 14, 15 opened by the stop 17 and guided from below against the sheet-like conveyed sheet path and held until the sheet edge reaches the point where the continuation belts 18 run tangentially from the continuation rollers 8 to the table 23. Here the pair of grippers 14, 15 is opened by a stop 22 for only a moment, which is sufficient to allow the bow of the belts to follow.
■ _ There are always a number of arches ^ on the way that build the archway like a roof tile over and over again.

The work of the continuation device from the front against the leading edge of the sheet has the further advantage that multi-sheet stacks can also be processed without requiring additional space can be.

SS claims:

i. Pneumatic sheet feeder for forming and continuing a web of sheets overlapping each other like scales * on the positioning marks of an offset machine, Folding machine or the like, in which the sheets are separated from the stack with the aid of suction air and placed under the sheet path working, revolving gripper devices are released, which lead the sheets individually upwards and this form the arched path, characterized in that the but constantly working under the sheet path from gripping means arranged one behind the other like a paternoster Tape or chain grippers (14, 15) exist, from the front each of the lifted and oncoming ones by the suction cups (5) Run towards the edge of the sheet (21) and take hold of the sheet while maintaining their previous direction of rotation lead upwards and in the usual way as a new link of the arched path append.

2. Apparatus according to claim 1, characterized in that the chain gripper device in a manner known per se for each arc width on the shaft (6) is set up displaceable and lockable.

1 sheet of drawings