DE1812018A1 - Conveyor device on a forklift for thin sheet-shaped shipments - Google Patents

Description

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Ulm (Danube), Elisabethenstrasse 3

Constance, November 29th, 1968 FE / PT-KN Ru / Bk

Conveyor device on a stacker for thin sheet-shaped mail

The invention relates to a conveyor device on a stacker for thin sheet-like mail items, which are to be given a stiffening curvature around at least one axis of curvature pointing in the conveying direction, with two (lateral) guide elements arranged on either side of a curvature axis from one side and one between them arranged further (middle) guide element act on the mail items from the other side of the conveying path.

009851/0113

A conveyor of the type mentioned is for example from the USA patent specification 3,052,467 (Fig. 4) known, which has a stacking device for sheet-like receipts such as checks. Here the side guide elements are through the formed two end plates of a first guide roller and the middle guide element by an between these end disks protruding further idler pulley. The axes of the guide rollers are arranged rigidly to one another. Here, every shipment, regardless of its stiffness, is forced to have the same curvature.

It is also known, e.g. from the USA patent 1,220,353 (Fig. 3), U.S. Patent 2, O45, O46 (Fig. 10) and the German Auslegeschrift 1142 879, counter-curvatures by attaching further guide elements to produce, by which, while limiting the resulting arch height, a further stiffening of the Broadcasts is achieved.

A stiffening curvature around at least one axis pointing in the conveying direction is essential for items of low inherent rigidity (strength) in order to be able to stack them without interference. As a result of their low rigidity, such mailings suffer only a slight permanent deformation. In the case of consignments with greater paper strength, on the other hand, only a correspondingly lower additional stiffening per se

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need, occurs undesirably due to the forced bending before stacking, especially after several Passing through a document processing system, a correspondingly larger permanent deformation This can - with mixed operation - during later processing operations, e.g. during the subsequent separation, lead to malfunctions or at least to a reduction in the permissible processing speed.

The invention is based on the object of creating a conveyor device of the type mentioned at the beginning, in which every consignment is given a stiffening curvature (curvature) that is sufficient for the stacking process, without permanent deformations of disruptive dimensions occurring.

This is achieved according to the invention in that the lateral guide elements and the central guide element are movable relative to each other and between them A spring force is effective in such a way that the curvature achieved in the case of stiffer mail items is less than with less stiff. The extent of the curvature imposed on the broadcasts is thus in contrast to the known ones Facilities not constant, but dependent on the inherent stiffness (strength) of each passing through Broadcast. This completely eliminates the above-mentioned disadvantages occurring in the known devices avoided.

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The drawing relates to an exemplary embodiment, a conveyor device according to the invention on one Stacker for sheet-like mail items such as in particular

beij

Evidence where-fdie-fdie Fig. 1 is a schematic section accordingly the line I-I and FIG. 2 shows a schematic section corresponding to the line H-II, omitted of the components behind it, shows.

The stacker contains a stacking table 1, which is controlled by a. Drive is brought into a position that corresponds to the respective height of the stack formed by the mail items 2. A stop wall 3 is provided in the stacking area. An arm 5 which can be pivoted about an axis k and which carries a flag 7 which interacts with a light barrier 6 rests on the stack 2. The light barrier 6 interacts with the control for the drive of the stacking table 1 and causes the stacking table to be lowered if and for as long as it is darkened by the flag 7.

At the entrance of the stacker there are conveyor rollers ö and 9, which feed the incoming mail to two guide runners 10 and 10, from which they reach a guide surface 12 and two further pairs of rollers, each formed by a guide roller 13 and a counter roller ik . For the passage of the counter rollers 14, the guide plate 12 is provided with an incision 13 that can be seen in the figures of the drawing.

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Corresponding to an axis of curvature lying approximately in a central zone of the mail items passing through the guide plate 12 has a bead 12 through which the middle guide element mentioned at the beginning is formed. The axes on either side of the curvature The lateral guide elements located on the side are designed as a two-part spiral spring l6, which is attached to the guide runner 11 and has a bracket 16 at the front.

forms with which it is shown in the |

Rest position on the arm 5 rests. In this position it passes through two further slots 17 made in the guide surface 12 and visible in FIG. 2.

On both sides of the spiral spring 16 forming the lateral guide elements, support elements 12 ″ are provided, which are formed by the areas of the guide surface 12 lying symmetrically to the bead 12 'on both sides and partly also by the counter rollers Ik . In the areas of the support elements 12 ″, l ^ t the position of the mail items is additionally determined by the guide rollers 13 acting on the mail items from the same side as the spiral spring l6.

Finally, subsequent to the support elements 12 ", in the region of the edges of the broadcasts, yet each another, just fall by di · guide surface 12 formed guide element 12" arranged ·.

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From the structure of the exemplary embodiment described the following mode of action results:

If a mail item 2a of low strength enters the conveyor of the stacker, e.g. a relatively thin document, it becomes the function of the elements provided in Fig. Assume the form drawn in dashed lines, where the ^ spiral spring l6 comes into the position labeled l6a. In the area of the bead 12 *, a strong curvature is imposed on the shipment 2a, through which the Consignment is stiffened accordingly.

If, on the other hand, a mail item 2b of greater paper strength enters the conveying device, it will be able to bring the spiral spring l6 into the position indicated by l6b, and the position shown in FIG take dash-dotted form. The curvature imposed on the mail item 2b ″ in the region of the bead 12; is therefore less than in the case of shipment 2a «

In the case of items of low to medium strength, the presence of the support elements 12 creates "counter-curvature θη" in the areas of the spiral spring i6 (position l6a) , for consignments of any firmness constant curvature a - increases, which is designated in Fig. 2 with h int.

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Another, relatively flat curvature is created by the presence of the outer guide elements 12 · '·.

009851/0113

Claims (2)

Claims 1. Conveyor device on a stacker for thin sheet-like mail items that have a stiffening curvature to be issued around at least one axis of curvature pointing in the conveying direction, two to each (Lateral) guide elements arranged on the sides of an axis of curvature from one side and an arranged further (middle) guide element act on the mail items from the other side of the conveying path , characterized in that the lateral guide elements (16) and the central guide element (12 ') are movable relative to one another and a spring force is effective between them, in such a way that the curvature achieved in the case of stiffer mail items (2b) is less than in the case of less stiff items (2a). W. 2. Conveyor device according to claim 1, characterized in that on both sides of the lateral guide elements (l6) support elements (12 ") are provided which are rigidly connected to the central guide element (12 ·) and in the areas of the lateral guide elements on the continuous Let consignment counter-curvatures arise. 009851/0113 3 · Conveyor device according to claim 2, characterized in that the two support elements (12 ") determine a predetermined curvature height (h) which remains the same for all mail items due to their position relative to the central guide element (12 ^1). k. Conveyor device according to claim 2 or 3, characterized in that the middle guide element through the bead (12 ¹ ) and the two support elements through both | on the one hand, symmetrical outer areas (12 ") the guide surface (12) are formed. 5. Conveyor device according to claim 4, characterized in that the lateral guide elements are designed as two-part spiral springs (16). 6. Conveyor device according to one of claims 2 to 5 » characterized in that in the areas of the support ^ elements (12") the position of the programs additionally by one from the same side as the lateral guide elements (l6) acting on the program Guide roller (13) is determined . 7. Conveyor device according to claim 6, characterized in that each guide roller (13) is assigned a counter roller (ΐΛ). 000051/0113 8. Conveyor device according to claim 6 or 7, characterized in that subsequent to the support elements (12 "), in the region of the edges of the mail items, a further outer guide element (l2 ^HI ) is arranged so that on each guide roller (13) Another, relatively flat curvature is created, the sense of which corresponds to the counter-curvature occurring on the lateral guide elements (16). 009851/0113 Blank page