DE9317919U1 - Stacking device - Google Patents

Description

STACKING DEVICE

The invention relates to a stacking device for printed products that are delivered in a shingle track, consisting of a cross-stacker and a rake basket arranged upstream with an upper movable rake for pre-collecting and a movable rake arranged at a distance below for collecting the printed products into a pre-stack, wherein the rakes (4) can each be pulled out laterally from the rake basket.

With such stacking devices, it can happen that thin printed products, for example those that consist of only one folded sheet and especially when the paper does not reach a certain rigidity, do not lie properly on the rack. It can also happen that when the pre-collected stack is placed from the upper rack onto the lower rack, problems can occur due to the large difference in height, e.g. the printed products that are in direct contact with the rack slipping.

The invention is based on the task of improving a rack so that it can produce a correct stack even at high speeds and with critical print products. Bank details: Raiffeisenbank Munich, Klo^r. US7Stj) (B*LzJ?0}2Ö300^i Baye?..Vereinsbank Munich, Account No. 620404 (BLZ 70020270)

Postal Office /ÄüncSen, IJto.-Nrt«?044i-8(&{Biz 70010080)

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Patent Attorneys STAEGER & SPERLING D 811

which can be transported without any problems through the rake basket to the stacking table of the cross-stacker.

The object is achieved according to the invention in that an intermediate rake is arranged between the two rakes at a predetermined distance, and the rakes deposit stacks collected on them on the lower rake or the stacking table of the cross-layer by moving out of the rake basket according to a predetermined control sequence.

These features make it possible to reduce the drop height of pre-stacked printed products within the rake basket without having to accept a smaller final stack.

Further advantageous embodiments of the stacking device are specified in the subclaims. 20

In the following, the invention is explained in more detail using an embodiment shown in the single drawing.

This single drawing shows a stacking device 1 for printed products that are delivered in the form of a shingle track 6. The stacking device 1 consists of a rake basket 2 and a cross-layer 3. In the rake basket 2, three rakes 4', 4" and 4'" are arranged one above the other at a distance, each in the form of a rake pair. The height distance between the rakes can be adjustable. The rakes are each moved into or out of the basket space by means of a piston/cylinder unit 7.

Patent Attorneys STAEGER & SPERLING D 811

moved out of it. The pairs of rakes 4' to A''' project opposite each other on each level up to approximately halfway into the basket space, so that the path and thus the length of the piston-cylinder unit only needs to be adjusted to half the clear width of the basket space 8.

A known cross-stacker is arranged beneath the rake basket, the stacking table 5 of which can be moved over the entire height of the interior of the cross-stacker up to the lower edge of the lowest rake A''' .

The shingle track 6 is designed in such a way that the printed products are initially deposited on the upper rake 4' by means of various conveyor belts. After a desired number of printed products have been collected, this rake is activated and moves out of the rake area. This causes this pre-collected stack to fall onto the intermediate rake A'' and, depending on the setting, can receive a few more printed products from the shingle track before the upper rake A' is moved back into its working position.

Almost simultaneously or with a slight delay, the rake A'' moves apart and transfers the pre-stack to the lower rake 4''' . While the products are now being pre-collected on the rake A' , the rake A'' closes again, whereby at the same time or with some delay the rake A''' opens in order to transfer the layer stack, which has not yet been pressed, to the stacking table 5 of the cross-layer stacker. The stacking table 5 of the cross-layer stacker can be moved to under the lower rake A''' so that the unpressed pre-stack only has a

Patent Attorneys STAEGER & SPERLING D 811

has a very low drop height until it rests on the stacking table 5. The stacking table is then lowered by the corresponding stack height and the rake 4''' closes again and is now ready to take over the intermediate stack from the intermediate rake 4".

In this way, it is possible to limit the fall height of both the individual printed products and the stacks to a minimum, so that even with thin printed products that tend to be easily blown out of the predetermined path during the fall, proper stacks are obtained.

The invention is not limited to the embodiment shown and described, but also includes other variations not shown. For example, the distance between the entrance of the scales into the rake basket and the first rake 4' can be smaller than the height difference between the first rake 4' and the intermediate rake 4"'. The upper rake 4' must then be opened twice, for example, in order to fill the intermediate rake, but this can prevent disruptions when larger, thin printed products enter the stack if the drop height is too great.

With such an arrangement, the printed product only ends up in an inclined position and is supported by the rake before it falls freely. This means that the printed product is guided safely and cannot blow out or take up an incorrect position.

Claims (1)

15 20 25 30 STACKING DEVICE PROTECTION CLAIMS Stacking device for printed products which are delivered in a shingle track (6), comprising a cross-stacker (3) and an upstream rake basket (2) with an upper movable rake (4') for pre-collecting and a movable rake (4''' ) arranged at a distance below it for collecting the printed products (6') into a pre-stack, wherein the rakes (4) can each be pulled out laterally from the rake basket, characterized in that an intermediate rake (4'') is arranged between the two rakes (4 ⁷ , 4 ^//7 ) at a predetermined distance, and the rakes deposit stacks collected on them on the respective lower rake or the stacking table of the cross-stacker by moving out of the rake basket according to a predetermined control sequence. Device according to claim 1, characterized in that the distances between the rakes (A',4'',4''') are substantially equal. Bank details: Raiffeisenbank Munich, ßo.-No. 1£S750$ (B^ Postgireatnt Wishes »0 Postgireatnt WüncSen, »0.-&ggr;3&kgr;«2!&Oacgr;4·£-8&Ogr;%(&Bgr;}.&Zgr; 70010080) &bull; · ·· · <. ! _ · · · Munich, account no. 620404 (bank code 70020270) Patent Attorneys STAEGER & SPERLING 3. Device according to claim 1 or 2, characterized in that the height distance between the rakes (4',4'',4''' ) is adjustable. 4. Device according to at least one of claims 1 to 3, characterized in that the rake basket (2) and the cross-stacker are adjustable to the dimensions of different printed products (6).