EP0931741B1 - Pile turning device - Google Patents

Abstract

A paper stack turning machine (1) incorporates a jack by means of which the stack of sheets of paper is lifted, inclined and inverted. It further has clamps (4) which hold the stack of paper secure during this operation, pads with which the paper stack sides are re-aligned as required, and ventilators which loosen the sheets of paper from each other. One side of the stack (B) has a side-face rule (5) which operates in at right angles to the clamps (4), and which may be repositioned parallel to the direction of the clamp (4) plane.

Description

The invention relates to a device according to the preamble of claim 1.

Devices are known which are referred to as pile turner, by means of whose stack of sheets can be manipulated on pallets. The Sheet stacks are used in printing or other paper processing Operated delivered on pallets and are therefore of the transport or type the packaging very strongly compressed so that the sheets tend to do so stick to each other. The stack can also be aligned by transport have been negatively influenced because the sheet stack can slip. to It is possible to process the sheets from the sheet stack individually required to loosen the entire stack and possibly the Realign the sheets to each other. When using so-called Logistics systems such as those recently used in wide areas of sheet processing the sheet stack may have to be used on others Pallets or support systems can be implemented. A pile turner is therefore in the Able to close a transport pallet together with the sheet stack resting on it to capture. For this purpose, it is provided with, if necessary fork-shaped, pliers. These pliers have an upper and a lower holder, between which the Sheets of sheets can be packed. In addition, the pile turner is with one Provide lifting device that allows the sheet stack to be lifted to tilt and pivot about an axis (US-A-4 070 767).

The goals of the further development of such a pile turner are various ones related to processing operations and batch quality Measures to see. For the preparation of sheet stacks for automatic Processing in sheet-processing machines, it is necessary to special the Take measures influencing stack quality. Furthermore, the Sheets of sheets, for example, from a simple transport pallet to one mentioned system range are implemented. The system palette serves the automatic feeding of the sheet stack to a sheet processing machine. The sheet stack should improve in terms of build quality the system range can also be aligned as precisely as possible. Farther The change of the transport pallet against the system pallet should be possible run automatically.

The object of the invention is therefore to re-stack a sheet stack Processing in a sheet-processing machine, especially the Implementation from a transport pallet to a system pallet with high Accuracy and as variable a positioning as possible on the system range enable.

This object is achieved according to the features of claim 1. Additional features of the subclaims are of particular importance here. The pile turner is provided with a ruler that applies to both Can align the transport pallet as well as the stack itself. The ruler also serves as a contact surface when swiveling the stack. Still is a clamping device is provided for the stack change. After all it is possible to attach runway parts to one of the carriers of the pile turner. In order to a pallet can be processed in one pass. In addition, can both carriers of the pile turner are attached to a runway part so that it can be used on both sides.

The following is based on graphic representations Embodiment of the invention shown in more detail.

Show in it

Figure 1

a first representation of a pile turner,

Figure 2

a pile turner in connection with a runway and

Figure 3

an elevation of a pile turner after the previous one Figure.

Figure 1 is a pile turner 1 together with one on one Transport pallet TP shown sheet stack B shown. The pile turner 1 is provided with a base frame 1A. The pile turner is attached to the base frame 1A 1 a hoist 2. The hoist 2 in turn is connected to a holding platform 3. Two clamping plates 4 are arranged transversely on the holding platform 3. The clamping plates 4 are trough-shaped in this case and along the Holding platform 3 slidable, so that a sheet stack B can be pinched. The sheet stack can then be lifted by means of the lifting mechanism 2 B around a horizontal axis from its upright standing position into a Be tilted up to 90 degrees, then the bend vertically stand. The hoist 2 is designed so that it is any other inclined position Sheet stack B can also start. The hoist 2 is also able the sheet stack B held in the clamping plates 4 by a perpendicular to Holding platform 3 to pivot the pivot axis D. Here lies the Sheet stack B on the holding platform 3.

On the holding platform 3 is still a device for alignment in shape a multi-adjustable rule 5 arranged. Policy 5 is both in the direction of the arrows in its length and position in the longitudinal direction adjustable, as well as on its holder 5A on the holding platform 3 parallel to the Clamping plates 4 in the working direction of the pile turner 1 and across it adjustable. So that the guideline both in its length, its position in Longitudinal direction and its positioning with respect to one side of a sheet stack and with regard to the position of the entire sheet stack B, all are Provide positioning options with actuators.

Finally, in the middle of the surface of the holding platform 3 is a vibrating and Ventilation unit 6 arranged. It is used to generate vibrations and Blown air acting on one side of the sheet stack B and the sheets detach from each other and align with each other.

For manipulating a stack of sheets on a TP transport pallet B in the pile turner 1 becomes in the direction indicated on the sheet pile B. retracted into the lower of the two clamping plates 4. Then the top of the moved both clamping plates 4 in the direction against the lower clamping plate 4 or the two clamping plates 4 are in the direction indicated by the arrow run against each other and the sheet stack B together with the transport pallet TP clamped between the clamping plates 4.

The sheet stack B together with the transport pallet TP can then be lifted by means of the lifting mechanism 2 tilted by 90 degrees or tilted at a smaller angle and be pivoted, as will be explained in more detail later. At the Swiveling the sheet stack B acts the guideline 5, which for this purpose in its length is adjustable and its position can be positioned in all directions and is driven against a corresponding side of the sheet stack B as Support and securing against shifting of the sheet stack B.

A further embodiment of the pile turner 1 is shown in FIG. Here, the basic structure of base frame 1A, lifting mechanism 2, holding platform 3, clamping plates 4, a ruler 5 and the vibrating and ventilation unit 6 of the embodiment described above is the same. However, transport rollers 7 are inserted into the clamping plates 4 at least on the underside. These transport rollers 7 can be arranged such that they can be fitted into a runway 8. Furthermore, the transport rollers 7 can be driven. In this way, a sheet stack B can be conveyed on such a roller conveyor 8 and inserted directly into the pile turner 1. After the sheet stack B has been automatically inserted into the pile turner 1, it can be detected and clamped with the aid of the second clamping plate 4. The transport rollers 7 are braked in this case or their drives are stopped, so that the sheet stack B can be held securely. By means of the second clamping plate 4, the sheet stack B can then be clamped and turned as already indicated. To adjust the sheet stack B within the pile turner 1, it is possible to arrange the transport rollers 7 mounted on the pile turner 1 so as to be movable in the direction of their axes of rotation. The sheet stack B can thus be moved not only transversely in the transport direction but also in the longitudinal direction within the pile turner 1. This can be useful for aligning the front stack side on the vibrating and ventilation unit 6 in the holding platform 3.
If necessary, 4 transport rollers 7 can also be arranged on the second clamping plate. Then the pile turner 1 can be used on both sides. The immovable mounting of the sheet stack B when swiveling is then, as already described, ensured by braking the transport rollers 7 and, above all, by the ruler 5 as a safety stop.

To ensure the exact positioning, it is provided in the pile turner 1 create a centering for the pallet to be used. The one to be used Pallet is, for example, the SP system pallet, which has defined dimensions, as they are in an automatic transport and processing system in In connection with a sheet processing machine to be used. in the simplest case, the system palette SP can be aligned on one edge and be centered in the pile turner 1. You can do this, for example Different standard formats adjustable stops in the pile turner 1 be provided. Likewise, each system range SP can be one regardless of size Receive the center mark, which is scanned on the pile turner 1 can be queried. System pallet SP and sheet stack B thus become one another centered.

Likewise, an asymmetrical arrangement of the sheet stack B within the pile turner 1 or to the system range SP is possible by means of the rule 5. The guideline 5 can be moved in the direction of the height and also in the direction of the width of the sheet stack B. Here, the ruler 5 can both be aligned first on a pallet, for example a transport pallet TP or a system pallet SP, and then also on the actual side surface of the sheet stack B. Finally, the ruler 5 is also arranged such that it can serve as a side stop when the sheet stack 5 is turned. So the ruler 5 can also be set above the wing of a pallet and not only on the side edge. The sheet stack B can also be held laterally by the straightedge 5 if the edges of the sheet stack B and the pallet are not covered.
Ultimately, the sheet stack B is already aligned on both sides, ie in the two orientation directions of the sheet, even when turning or pivoting, since it already comes to rest on one side on the holding platform 3 and on a second side on the straightedge 5.

With the help of the guideline 5 as a safety stop, it is also possible the sheet stack B in an inclined position of the clamping plates 4 of the pile turner 1 turn and thus save time for the production process. Here, the Sheet stack B is not tilted by 90 degrees, as is customary, around the sheet stack B to be able to swivel safely. Rather, the sheet stack B is only one Angles of 45 degrees, for example. When swiveling the Sheet stack B then inevitably gets at least one stack side in one Hillside down. But she can focus on this in this direction Support the adjacent guideline 5. The danger of slipping the Sheet stack B does not exist.

The use of the pile turner 1 described above presupposes that a There is a connection to stack transport and pallet handling.

Here, the stack can be transported via roller conveyors 8 or also via separate floor conveyors.
Furthermore, the supply of empty pallets or the removal of empty pallets can be provided for each pile turner 1. This is useful, for example, if the transport pallet TP is to be exchanged for a so-called system pallet SP.

In the exemplary embodiment, however, the handling of the pallets is itself in the Pile turner 1 is only provided insofar as, for example, a system range SP recorded together with the sheet stack B and the transport pallet TP and when turning by clamping on one of the clamping plates 4 is attached. For this purpose, a holding device or a fastening device can be provided in which the system range SP can be used or attached and can also be clamped if necessary. In the process of Batch treatment is then when the sheet stack B is released with the corresponding device, the system palette SP above the sheet stack B and the exposed transport pallet TP can be manually or be removed automatically. For placing on the SP system range the sheet stack B then only needs together with the system palette SP to be pinched and turned. This is a safe and quick process for given the implementation of the sheet stack B on a system pallet SP.

The pallets can be held on the pile turner 1 in different ways happen. Here, e.g. it is possible to slide a pallet onto support arms, if the pile turner 1 is not with clamping plates 4 as shown, but with conventional fork-shaped support arms is provided. Furthermore, a Clamping device on the support arms or clamping plates 4 of the pile turner 1 be provided, the pallet there, for example, by clamping a Pallet part fixed. The holding device can also be used simply as a hook arrangement be carried out, into which the pallet can be inserted by means of the holding device but also the position of the pallet to be used can be determined. Therefore, one Holding device provided that the pallet to be used, for example the system range SP, fixed in the direction against the holding platform 3. Against this Holding platform 3 is also the sheet stack B when shaking and aerating created. This results in an automatic parallel alignment of System range SP and sheet stack B.

Schritt A

Der Bogenstapel B wird auf der Transportpalette TP in den Stapelwender 1 eingefahren. Das Richtlineal 5 dient dabei als Justieranschlag.

Schritt B

Der Bogenstapel B wird zusammen mit der Transportpalette TP im Stapelwender 1 zwischen den Klemmplatten 4 festgeklemmt. Das Richtlineal 5 wird auf die Länge zwischen den Klemmplatten 4 eingestellt.

Schritt C

Der Bogenstapel B wird zusammen mit der Transportpalette TP im Stapelwender 1 mittels des Hubwerkes 3 um 90 Grad gekippt oder um einen Winkel kleiner 90 Grad angekippt.

Schritt D

Der Bogenstapel B wird nunmehr zusammen mit der Transportpalette TP im Stapelwender 1 mittels des Hubwerkes 3 um eine senkrecht auf der Halteplatte 2 stehende Achse geschwenkt.
Das Richtlineal 5 wirkt dabei als Sicherungsanschlag für den eingeklemmten Bogenstapel B.

Schritt E

Die Klemmplatten 4 werden auseinander gefahren. Der Bogenstapel B wird gerüttelt und belüftet. Gegebenenfalls wird die Transportpalette TP gegen eine Systempalette SP ausgetauscht.

Schritt F

Der Bogenstapel B wird zusammen mit der Transportpalette TP (Systempalette SP) erneut zwischen den Klemmplatten 4 geklemmt, in die richtige Orientierung mit der Transportpalette TP (Systempalette SP) nach unten geschwenkt, in die Ausgangslage zurückgekippt, im Stapelwender 1 abgesetzt und kann dann verarbeitungsbereit aus dem Stapelwender 1 ausgefahren werden.

Batch processing is explained again in the following steps A to F:

Step A

The sheet stack B is moved into the stack turner 1 on the transport pallet TP. The rule 5 serves as an adjustment stop.

Step B

The sheet stack B is clamped together with the transport pallet TP in the pile turner 1 between the clamping plates 4. The guideline 5 is set to the length between the clamping plates 4.

Step C

The sheet stack B is tilted together with the transport pallet TP in the pile turner 1 by means of the lifting mechanism 3 by 90 degrees or tilted by an angle of less than 90 degrees.

Step D

The sheet stack B is now pivoted together with the transport pallet TP in the pile turner 1 by means of the lifting mechanism 3 about an axis perpendicular to the holding plate 2.
The guideline 5 acts as a safety stop for the jammed sheet stack B.

Steps

The clamping plates 4 are moved apart. The sheet stack B is shaken and aerated. If necessary, the transport pallet TP is exchanged for a system pallet SP.

Step F

The sheet stack B is clamped together with the transport pallet TP (system pallet SP) again between the clamping plates 4, swiveled downwards into the correct orientation with the transport pallet TP (system pallet SP), tipped back into the starting position, set down in the pile turner 1 and can then be processed the pile turner 1 are extended.

Schritt A

Der Bogenstapel B wird zunächst außerhalb des Stapelwenders 1 (oder mit dessen Hilfe) gemeinsam mit der Transportpalette TP auf eine Systempalette SP abgesetzt und in den Stapelwender 1 gegen das Richtlineal 5 eingefahren.

Schritt B

Der Bogenstapel B wird zusammen mit der Transportpalette TP und der Systempalette SP im Stapelwender 1 zwischen den Klemmplatten 4 festgeklemmt. Das Richtlineal 5 wird auf die Länge zwischen den Klemmplatten 4 eingestellt.

Schritt C

Der Bogenstapel B wird zusammen mit der Transportpalette TP und der Systempalette SP im Stapelwender 1 mittels des Hubwerkes 3 gekippt / angekippt.

Schritt D

Der Bogenstapel B wird zusammen mit der Transportpalette TP und der Systempalette SP im Stapelwender 1 mittels des Hubwerkes 3 um eine senkrecht auf der Halteplatte 2 stehende Achse geschwenkt. Das Richtlineal 5 wirkt dabei als Sicherungsanschlag.

Schritt E

Die Klemmplatten 4 werden (ggf. nur in geringem Umfang) auseinander gefahren. Der Bogenstapel B wird gerüttelt und belüftet.
Die Transportpalette TP wird aus dem Stapelwender 1 entnommen, wobei die Systempalette SP an einer Klemmplatte 4 festgeklemmt und gehalten wird.

Schritt F

Der Bogenstapel B wird zusammen mit der Systempalette SP wieder zwischen den Klemmplatten 4 geklemmt, in die richtige Orientierung mit der Systempalette SP nach unten geschwenkt, zurückgekippt, im Stapelwender 1 abgesetzt und kann dann verarbeitungsbereit aus dem Stapelwender 1 ausgefahren werden.

In the special case of simplified pallet exchange, the steps remain basically the same. There are only a few changes:

Step A

The sheet stack B is first placed outside the stack turner 1 (or with its help) together with the transport pallet TP on a system pallet SP and moved into the stack turner 1 against the guide 5.

Step B

The sheet stack B is clamped together with the transport pallet TP and the system pallet SP in the pile turner 1 between the clamping plates 4. The guideline 5 is set to the length between the clamping plates 4.

Step C

The sheet stack B is tilted / tipped together with the transport pallet TP and the system pallet SP in the pile turner 1 by means of the lifting mechanism 3.

Step D

The sheet stack B is pivoted together with the transport pallet TP and the system pallet SP in the pile turner 1 by means of the lifting mechanism 3 about an axis perpendicular to the holding plate 2. The guideline 5 acts as a safety stop.

Steps

The clamping plates 4 are moved apart (possibly only to a small extent). The sheet stack B is shaken and aerated.
The transport pallet TP is removed from the pile turner 1, the system pallet SP being clamped and held on a clamping plate 4.

Step F

The sheet stack B is clamped together with the system pallet SP again between the clamping plates 4, pivoted downward into the correct orientation with the system pallet SP, tilted back, set down in the pile turner 1 and can then be moved out of the pile turner 1 ready for processing.

For different printing materials or sheet materials it is possible to use different ones Set production processes on pile turner 1. Here comes in particular to ensure that thinner substrates stick together more than thicker ones Substrates. In addition, the consumption of sheets with thick substrates larger than with thinner substrates because the stacks are processed faster become. Furthermore, the stack weights vary depending on the substrate.

In view of these criteria, it makes sense to have different procedures Predefine for the pile turner 1 and based on the incoming material automatically expire. A controller is provided here it enables the type of stack and the substrate to be recognized. This can for example via a barcode reader, by means of which either the operator writes the data from a label attached to sheet stack B. reads or the data from the sheet stack at an automatic reading station B can be scanned. From the determination of the size of the sheet stack B and the control of the pile turner 1 takes one from the pile weight certain course of treatment for the transfer of the stack.

• die Einstellungen für die Positionierung des Bogenstapels B im Stapelwender 1 mittels der Transportrollen 7,8,
• die Bestimmungswerte für die Erfassung des Bogenstapels B mit den Klemmplatten 4 und deren Haltekraft,
• die Einstellung und Positionierung des Richtlineals 5,
• die Einstellung der Rüttel- und Belüftungseinheit 6 bezüglich Intensität und Dauer und gegebenenfalls Anwendungszyklen,
• der Kipp-bzw. Ankippwinkel des Hubwerkes 3
  und
• die Zangenbewegung der Klemmplatten 4 beim Belüften und Austauschen der Paletten

mittels einer Voreinstellung beispielsweise bei einem Probelauf erfasst und in einer Steuereinheit des Stapelwenders 1 sowohl als Stellwerte abgelegt, als auch als Ablaufprogramm eingespeichert. Bei der weiteren Verarbeitung von Bogenstapeln B können dann in Abhängigkeit der Rahmenbedingungen und der Daten zu einem Bogenstapel B die verschiedenen Ablaufprogramme für die Stapelbehandlung aufgerufen werden.
In Vereinfachung der Abläufe werden die Abmessungsparameter und die von Papiersorte und Stapelgewicht beeinflussten Einstellungen in einem programmierten Ablauf zur Stapelbehandlung aufeinander abgestimmt abrufbar gemacht.Here, the specific needs of the respective printing material or stack type are selected and, if necessary, also depending on the supplier, the environmental conditions and the specific requirements from further processing in a sheet-processing machine

• the settings for the positioning of the sheet stack B in the pile turner 1 by means of the transport rollers 7, 8,
• the determination values for the detection of the sheet stack B with the clamping plates 4 and their holding force,
• the setting and positioning of the rule 5,
• the setting of the vibrating and ventilation unit 6 with regard to intensity and duration and, if applicable, application cycles,
• the tipping or. Tilt angle of the hoist 3
  and
• the forceps movement of the clamping plates 4 when ventilating and replacing the pallets

detected by means of a presetting, for example in a test run, and stored in a control unit of the pile turner 1 both as control values and also stored as a sequence program. During the further processing of sheet stacks B, the various sequence programs for the batch handling can then be called up depending on the general conditions and the data for a sheet stack B.
In order to simplify the processes, the dimension parameters and the settings influenced by the paper type and stack weight are made available in a programmed process for batch processing.

For the execution of the pile turner 1 are only the essential features cited, so that further embodiments within the scope of the described can be given. For example, the pile turner 1 can be used for detection of a sheet stack B can also be arranged to be movable in its longitudinal direction.

LIST OF REFERENCE NUMBERS

pile turner

1

base frame

1A

hoist

2

support platform

3

clamps

4

straightedge

5

bracket

5A

Vibrating / ventilation unit

6

transport wheels

7

runway

8th

sheet pile

B

pallet

TP

system palette

SP

Claims (13)

1. Pile turner (1) for a sheet pile (B) with a lifting unit (2) for lifting, tipping and swivelling of the sheet pile, clamping means (4) for grasping and holding a sheet pile preferably together with at least one pile pallet (TP) and with means for aligning and aerating the sheet pile, characterised in that a stop means (5) acting on one side of the sheet pile (B) is provided which is shiftably arranged laterally to a pile position between the clamping means (4).
2. Pile turner according to Claim 1, characterised in that a control for the pile turner (1) is provided by means of which at least adjustments of the stop means can be detected and positioning of the stop means can be preset and automatically approached.
3. Pile turner according to Claims 1 to 2, characterised in that the stop means is a rectilinear guide (5) which is arranged perpendicular to the plane of the clamping means (4).
4. Pile turner according to Claims 1 to 3, characterised in that the rectilinear guide (5) is arranged shiftably parallel to the direction of the planes of the clamping means (4).
5. Pile turner according to Claims 1 to 4, characterised in that the rectilinear guide (5) is arranged adjustably in its longitudinal alignment both in its position and also in its length.
6. Pile turner according to Claims 1 to 5, characterised in that the rectilinear guide (5) is constructed as a lateral stop for the sheet pile (B) in such a fashion that the sheet pile (B) on swivel movements is secured against shifting in the oblique position by the rectilinear guide (5).
7. Pile turner according to Claims 1 to 6, characterised in that the clamping means are constructed as clamping plates (4).
8. Pile turner according to Claims 1 to 7, characterised in that at least one of the clamping plates (4) is provided with transport rollers (7) for driven transport of a sheet pile (B).
9. Pile turner according to Claim 8, characterised in that both clamping plates (4) are provided with transport rollers (7).
10. Pile turner according to Claim 8, characterised in that the transport rollers (7) on at least one clamping plate (4) are constructed shiftably in the direction of their longitudinal axes.
11. Pile turner according to Claims 1 to 7, characterised in that on at least one clamping plate (4), a device for holding a pallet is provided in such a fashion that the pallet with the turned sheet pile (B) is liftable by means of the mounting together with the clamping plate (4) away from the sheet pile (B).
12. Process for aerating, aligning and upsetting a sheet pile using a pile turner according to Claim 1 or 2, characterised in that the sheet pile (B) is positioned against the stop means, that the sheet pile (B) is gripped and held by the clamping means (4) together with a pallet, the sheet pile (B) is tipped through an angle between 0 and 90 degrees, that the sheet pile (B) with application of the stop means is swivelled in such a way that it remains adjacent against the stop means and that the sheet pile (B), after alignment, aeration and exchange or removal of the pallet while against the stop means, is swivelled back again and deposited.
13. Process according to Claim 12, characterised in that the sequence of pile processing can be stored in the control in such a fashion that, in differing stores of the control, values

    for the dimensions and weight of the sheet pile (B) and of individual sheets,

    for data for the positioning of the sheet pile (B) on a pallet, and

    processing parameters with respect to application time and application intensity of the pile alignment or pile aeration are stored,

    that independently of the stored values for the dimension and weight of the sheet pile (B) and individual sheets and for data for the positioning of the sheet pile (B) on a pallet, values for the processing parameters and the positioning of lifting unit (2) and stop means are determined,

    that the values for dimensions and weight of the sheet pile (B) and individual sheets are read in automatically or manually on the feed of a sheet pile (B) to the pile turner (1) and

    that the pile processing takes place by a sequentially correct calling up of the coordinated values of the operating parameters and the positioning of lifting unit (2) and of the stop means.

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