DD216435A1 - METHOD AND DEVICE FOR ARRANGING ARC - Google Patents

Abstract

Method and device for aligning sheets on printing presses, in which the sheet is conveyed by means of endless Kettenfoerderer from the last printing unit on a delivery pile and stored there aligned on two sides. The aim of the invention is that the sheet can be reliably aligned even at high speeds and with reduced gearbox complexity. The task of creating an extension of the alignment time for the sheets is achieved by the following method steps: the sheet is laterally offset by a constant amount onto the delivery pile; - where d. Arc of a slider element transversely z. Bogenlaufrichtg. is pushed under the pull mark.

Description

VEB Combined Polygraph

"Werner Lamberz" Leipzig

7050 Leipzig Leipzig, 27.06.1983

Method and device for aligning sheets

Anwendungagebiet

The invention relates to a method and a device for aligning sheets on printing presses, in which the sheet is conveyed by means of endless chain conveyors from the last printing unit to an outfeed stack and aligned there on two sides. '

Characteristic of the known technical solutions

By the DE-GM 7534635 a device for aligning sheets of cardboard, cardboard, corrugated cardboard, etc., has become known, in which a stack tray is provided, are attached to the stacked sides to be aligned stops and that at the top of the stack Blower is provided, the Blasmündung opposite the attacks is, these

  'H.JÜL198.3 * iUlÜ'87

generates a horizontal airflow. The sheets are moved by the air flow to the side stops and held in suspension until they are weighted by the weight of the subsequent bow so that they can not slip. '', ';'

The disadvantage of this device is that at high speeds the built-up air cushion can not escape quickly enough and thus uneven stack formation is favored.

Other known devices have a pneumatic pulling device that align the stored sheet by pulling it against the side stops.

To store the sheet, the pull mark is pivoted out of the stack. This leads to shortened Auerichtezeiten at high speeds, which allows a calming of the sheet, if its edge is already aligned and is still held by the Ziehmarke, only to an insufficient extent. After the release of the edge by the pull mark a new shift of the bow is possible in this case. In this device, the gearbox complexity is relatively large.

the invention

The object of the invention is a method and a device for erecting sheets, in which the sheet can be aligned reliably even with high speeds and with reduced gearboxes without Au'wand.

Object of the invention

The object of the invention is a method and a device for aligning sheets, with the aid of which the alignment time for the sheets on the stack is lengthened.

Essence of the invention

According to the invention, the object is achieved by the method steps that the sheet to be deposited is laterally offset by a constant amount on the delivery pile, the sheet is pushed by a sliding element transversely to the sheet travel direction under the drawing mark, where it detects the toggle, aligns and According to the invention, the object is achieved by the device for carrying out the method in that the delivery stack is offset by a constant amount relative to the sheet travel direction and that a sliding element is arranged transversely to the direction of sheet travel.

Pas sliding element is connected via a plunger, a sliding block with Gleitsteinführung, a transmission lever and a cam roller with a Axialkurvenscheibe · By a greater alignment time per clock is achieved in a particularly advantageous manner, an increase in performance in the delivery.

embodiment

The invention will be explained in more detail with reference to an embodiment.

In the drawing-a perspective view of the solution according to the invention is shown.

To the delivery pile 1 front and rear sheet stops 2, 3 are arranged in Bogenablagerichtung. On the right side of the delivery pile 1 is a movable pull mark 4-. The Auslegestapel 1 is offset by a defined amount X relative to the sheet 5 to be deposited. Also offset by the amount X X is a sliding element 6 is arranged on the left side of the delivery pile 1. The sliding element 6 is connected to a slide 7 which is moved in a straight-line guide and is mounted on a sliding block with sliding block guide 8

is fastened, connected to a transmission lever 9 and 10 connected to this transmission lever 9 rotatably mounted cam roller. By means of a tension spring, not shown, the system of the cam roller 10 is secured to a Axialkurvenscheibe 11. The Axialkurvensoheibe 11 is in communication with the drive of the printing press. The path X is dependent on the stroke of the axial cam 11th

The mode of action is the following:

The released from the gripper carriage, Naohgreifern öder brake elements not shown bow 5 is offset by the amount X on the delivery pile 1 adjacent to the front and rear stops, filed. As a result, the projected area of the sheet 5 is outside the stacked floor plan. The axial cam 11 is driven in synchronism with the machine speed and thereby moves the sliding element 6 via the cam roller 10, the transmission lever 9, the sliding block with sliding block guide 8 and the plunger 7 transversely to the Bogenförderrichtungibis in the vicinity of the rear edge of the delivery stack 1.;

By this movement of the sliding element 6 of the sheet 5 is moved to the drawing element 4, which detects it by means of suckers, aligns and then deposits. ·> R

During this alignment process of the drawing head 4, the next following sheet can already be laid, whereby time is gained for the "extension of the bowing." Above the aligning edge, it is recommended to support the sheet drop by blowing air, so that the sheet edge always gets under the drawing mark.

Claims (3)

invention claim 1. A method for aligning sheets in which the sheets are conveyed by means of endless Kettenfoerderer from the last printing unit and released by gripper carriage, Nachgreifer or brake elements on the delivery pile, where the sheet is aligned by a drawing device by this pulls the sheet against attacks, characterized in that J a) the sheet (5) to be deposited is laterally offset by a constant amount (X) onto the delivery pile (1), b) the sheet is pushed by a sliding element (6) transversely to the sheet running direction under the drawing mark (4), where it captures, aligns and deposits the drawing mark (4), wherein the next sheet can already be förerd on the delivery pile (1). 2. Device for carrying out the method according to item 1, characterized in that the delivery stack (1) by a constant amount (X) is offset from the sheet travel direction and that transversely to the direction of sheet travel, a sliding element (6) is arranged. 3. Device according to item 2, characterized in that the sliding element (6) via a bumper (7) a sliding block with Gleitsteinfuehrung (8), a transmission lever (9) and.eine. Cam roller (10) with a Axialkurvenscheibe (11) is connected. ί η ι /  π Q cn * t.:>r>lMi ι.