DE102009031117B3 - Apparatus and method for the stacked storage of sheet-shaped substrates - Google Patents

Abstract

The present invention relates to a device and a method for stacking sheet-like substrates, in particular printing materials, in a printing press. The device has a tray for receiving the substrates, the tray having a tray surface which is tilted about a first axis and about a second axis with respect to a horizontal. Furthermore, a lifting device for raising and lowering the tray is provided, as well as a first stop with a first contact surface and a second stop with a second contact surface, the first and the second contact surface standing perpendicular to each other and substrates deposited on the tray due to the tilting of the Tray surface come to rest on the first and second contact surface.

Description

The The present invention relates to a substrate depositing apparatus and a method for stacked Tray of arcuate Substrates, in particular of substrates in a printing press.

In The printing technique is known to print on arcuate substrates and this afterwards on a height-adjustable Tray as a stack. Here, the substrates are usually with a certain distance over the tray or top sheet of a stack on the tray promoted and then released, causing the arch to fall down. It It is known to provide the tray with a slope against a transport direction of the substrate is inclined to enable that the substrates slip against a stop to the transport direction the substrates to produce a defined stack edge. Further is it's known side stops provided on the tray, the orientation of the stack also should provide in the lateral direction. Are known, for example Systems, the side guides which can be moved towards and away from each other to compress an intervening substrate stack and again to thereby release a defined lateral stack edge produce. Such systems are only suitable for smaller stacks, which allow a corresponding compression. In addition, such systems associated with high costs and prone to failure.

Also are known systems that work with lateral guides along the the substrates slide on dispensing and thus the substrate into a transport predefined position should. However, systems of this type have the disadvantage that the guidance accuracy by the need to clear the width between the side guides always bigger than that nominal format width is limited. The reason for this are cutting tolerances the substrate and caused by the printing press delivery deviations single bows transverse to the transport direction.

Consequently arise when dispensing substrates in known systems often Stack inaccuracies transverse to the substrate transport direction. Various Disturbance variables, such as z. B. an oblique orientation also called skew, electrostatic charges, bends of the substrates, also called curl, as well as friction between substrates, influence about it addition, disadvantageous accurate stacking, with light bows stronger than bows with higher Weight impaired become.

The publication US 2008/0230983 discloses an apparatus for depositing sheets on at least one tray. The aim of this document is to provide a tray that allows controlled filing and controlled stacking of sheets. For this purpose, a storage surface of the storage tray is rotated by a certain angle from the horizontal.

Of the The present invention is therefore based on the object, a device and a method of stacking Storage of arched substrates, which a wide-ranging May have substrate area, with elevated Stacking accuracy, in particular transversely to the substrate transport direction, to put on a tray.

According to the invention this Task by a device according to claim 1, and a method according to claim 21, solved. Further embodiments of the invention will become apparent from the respective Dependent claims.

Especially is a device for stacked Tray of arcuate Substrates, preferably of substrates in a printing press provided a tray for receiving the substrates and a Lifting device for raising and lowering the tray has. The tablet has a tablet surface which are about a first axis and about a second axis with respect to a Horizontal is tilted. The device also has a first stop with a first contact surface and a second stop with a second contact surface on, wherein the first and the second contact surface are perpendicular to each other and wherein on the tray deposited substrates due to the tilting the tablet surface come to rest at the first and second contact surface.

A such device allows with a simple construction high stacking accuracy, as an alignment takes place at two mutually perpendicular stops. An advantage of such Substrate stack is that this without further intermediate steps can be processed further. Here, the further processing of the substrate stack, for example include the binding thereof. By the corresponding two-fold Tilt of the tray is a movement of the substrates against the attacks automatically without the use of expensive mechanical systems Need to become. Lifting and lowering the tablet essentially allows one constant fall height the output substrates on the stack. The lifting and lowering can done in different ways. So it is z. B. possible, before each time a substrate sheet is dispensed, the tray is given a specific one Lowering way. Furthermore, it is possible in each case after a predetermined Number of substrate sheets the tray for a greater distance lower.

In one embodiment of the invention is the first axis parallel to a substrate transport axis, and the second axis is perpendicular to the first axis and lies in a plane which is parallel to the tray surface.

Preferably the device has a gas supply device with a gas outlet opening, which is directed towards the lowest point of the support surface. in this connection can the bearing surface be formed on the one hand by the tablet surface itself and on the other hand by substrates that are already on the tablet surface. The gas supply device is suitable for a gas flow to the tablet level or substrate surface to guide to a friction-reduced sliding of the arcuate substrates to the attacks to ensure. Furthermore, the substrates are also taken by the gas stream.

The Gas outlet is preferably in height a storage level for arranged the substrates. This can ensure that through the gas supply unit an air cushion in the corresponding Height generated is slid on the subsequent substrates friction reduced to the stops can.

Especially can open the gas outlet directed an area between the first and second contact surface be. For example, this area is in one corner of the tablet. Preferably, the first and / or second stop should be designed in this way be that the gas flow can flow past unhindered. This can be achieved, for example, that the second Stop is sufficiently spaced from the first to pass through To allow gas in between. Could also the second stop, for example, have holes or through a wire hanger be educated.

The Gas supply unit may have a gas nozzle, an increase the exit velocity of the gas stream to reach what the can enhance friction-reducing effect on the substrates. Furthermore, by using a gas nozzle, a desired direction of the gas flow is easier to realize.

Corresponding an embodiment, points the gas supply unit a blower on. However, you can other devices may be provided which are capable of to generate a gas stream.

In an embodiment the second stop is arranged perpendicular to the tray surface. The resulting 90 ° angle between the second stop and the tablet surface causes an on-tray substrate stack perpendicular to the substrate transport direction has no distortion. Distortion means in this context an angle of the stack towards the second stop, the smaller is as 90 °.

In an alternative embodiment of the invention is the second stop arranged vertically. Such an arrangement of the second stop has the advantage that the tray can be lowered vertically, without leaving a path that pushes the substrate up to the second stop to cover has increased by lowering the tray.

For one simple construction of the device allows the second stop directly be attached to the tray. In particular, the second stop be arranged adjustable on the tray. This makes it possible to Stop along a direction transverse to the sheet transport direction to adjust. Such a setting should be done before starting of discharging the substrates, and is dependent on Format of the substrate used. A setting of the stop can in particular be done in such a way that the way the substrate must slide in the direction of the stop transversely to the transport direction, is minimized. By such a minimized sliding distance, which the substrates must slide in the direction of the stop can a significant improvement in stacking accuracy across the sheet transport direction be achieved. Especially with narrow substrates that are not adjustable attacks correspondingly longer distances would have to slide Such an arrangement can have a positive effect.

The Adjustment of the stop can be done automatically by motors or others electrical or pneumatic actuators take place. As usual Most system controls of modern printing presses have information about the format width contain the substrate to be printed, it can be a way information for the Stop are detected, and then automatically without influence an operator are converted into a stop position.

Around to ensure an efficient adjustment of the second stop the tablet can be a linear guide For this exhibit.

Becomes the stop, as mentioned above, mechanically adjusted, so may in a further embodiment a thumbwheel be provided over that the position of the second stop is to be adjusted. The thumbwheel can act on an axis, which in turn has a Deflection on the second stop acts and this thereby across adjusted to the substrate transport direction.

In one embodiment of the invention the lifting device raises and lowers the tray parallel to the second bearing surface. This ensures that the distance that the substrate has to travel as far as the second stop remains the same even with increasing stack height. In the case of the second stop, which is arranged perpendicularly to the tray surface, such lifting or lowering results in a stroke direction deviating from the vertical.

In an embodiment of the invention, the first stop part of a Shelf, over the bows be placed on the tray. This can, for example, a rear wall of a printing press which is located below a Substratauswurfs, and on which the substrates come to rest.

Especially the first stop may be inclined so that this with a adjacent area of the tray surface forms a right angle. Will be afterwards the tray raised or lowered parallel to the first contact surface, so Can be used in combination with a vertically mounted on the tray second stop a substrate stack are generated which is not in Substrattransportrichtung, still transversely thereto has a distortion; So in both directions forms a 90 ° angle.

In According to a further embodiment of the invention, the tablet surface a first and a second storage area, which around the second axis are tilted differently from the horizontal. hereby can be avoided that the substrates when dispensing on the Tray transported against an excessively inclined tray surface Need to become. In contrast, in the first area of the tray surface is a greater inclination the tablet surface he wishes, since this helps to slide the substrates on the tablet.

Farther can thereby move already existing substrates on the Tray to be prevented.

The The problem underlying the invention is also achieved by a method for stacked storage of arcuate Substrates, especially of substrates in a printing press solved, in which the arcuate Substrates to a substrate tray with a tray and a first and promoted a second stop become. The tray is parallel to a substrate transport axis about a first axis and about a second axis which is perpendicular to the first axis and parallel to a tablet plane, rotated. The method points lowering the tray and creating a gas stream below a respective on the tray funded substrate, the on directed an area between the first and the second stop is on. In this method, the arcuate substrates through the Tilting and the gas stream transported against the stops, with a Air cushion generated by the gas flow, the friction between the arcuate Substrate and the tablet surface or a substrate already on the tray is reduced. Lowering the tray results in a consistent drop height of the substrate on the tablet surface, or a substrate located there, maintained.

Preferably the tray is lowered parallel to the contact surface of the second stop. This can ensure that the distance for the substrate remains the same until the second stop despite lowering the tray. In one embodiment the second stop extends perpendicular to the tablet surface, whereby a 90 ° angle the substrate stack is ensured transversely to the substrate transport direction is.

In an alternative embodiment of the invention is the second stop arranged vertically to a horizontal.

Of the first stop can be made with an adjacent area of the tray surface form right angle. Because the tray surface is inclined to the horizontal This is due to the fact that the first stop relative to the horizontal is also inclined. Preferably, the tray is in this embodiment parallel to the first contact surface lowered, thereby ensuring is that the substrate stack towards the first contact surface a 90 ° angle having.

The The invention will be described below with reference to the drawings explained in more detail in show the drawings:

1 a schematic side view of a boom portion of a printing machine with inventive substrate storage device;

2 a schematic plan view of the Substratablagevorrichtung according to 1 ;

3 a schematic front view of the Substratablagevorrichtung according to 1 ;

4 a schematic perspective view of the Substratablagevorrichtung according to 1 ;

5 a schematic plan view of an alternative Substratablagevorrichtung;

6 a schematic, perspective view of the alternative Substratablagevorrichtung;

7 a front view of the alternative Substratablagevorrichtung;

8th a schematic, perspective view of the alternative Substratablagevorrichtung; and

9 a schematic side view of a printing machine with a further alternative Substratablagevorrichtung.

In The location or direction used in the following description relate primarily on the representations in the drawings, and therefore should not restrictive be seen. You can but also relate to a preferred final arrangement.

1 shows a schematic side view of a boom portion of a printing machine with a substrate output unit 1 a substrate depositing device 2 , as well as a gas supply unit 3 ,

The substrate output unit 1 owns a variety of transport wheels 4 that are suitable substrates 6 from a printing area of the printing press along a substrate transporting direction A indicated generally by an arrow (from right to left in FIG 1 ) to the substrate depositing device 2 to promote.

The substrate depositing device 2 has according to a first embodiment, in the 1 to 4 is shown a tray 10 with a tablet surface 8th on. The tablet surface 8th has a first storage area 12 that is adjacent to the substrate dispensing unit 1 lies, and a second storage area 14 farther from the substrate output unit 1 away. As in 1 can be seen, are the first and the second storage area 12 . 14 inclined to the horizontal direction opposite to the substrate transport direction A, wherein the first storage area 12 has a greater inclination than the second storage area 14 , In 3 it can be seen that the tablet surface 8th is also tilted about a first axis parallel to the substrate transport direction A to the horizontal. This tilting of the tablet 10 about the first axis is combined with the inclination of the first and second storage areas, which tilt the tray 10 around a second axis, perpendicular to the first axis. As a result, the tablet surface falls overall to an edge 18 down, which is the lowest point of the support surface 8th forms.

As in the 2 to 4 can be seen, the tablet surface 8th an elongated recess 20 with a central pier 22 on, which extend along the substrate transporting direction A. The recess 20 as well as the Mittelsteg 22 extend from an outer end of the tray remote from the substrate dispensing unit 10 over the second area 14 in the first area 12 the tablet surface 8th , The recess 20 facilitates on the one hand the removal of a substrate stack and on the other hand facilitates the promotion of the substrate 6 over the tablet surface 8th ,

Like also in 2 It is easy to see between the storage areas 12 and 14 an edge 24 formed transverse to the Substrattransportrichtung on the tray surface 8th extends. Although the edge in the figures as a cutting edge of two straight shelves 12 . 14 is shown, the storage surfaces can also be connected via a rounded part.

In substrate transport direction A adjacent to the first storage area 12 of the tablet 10 is a substantially vertically extending first stop 25 provided, the part of the substrate output unit 1 or the substrate depositing device 2 can be. In the illustrated embodiment, the stop 25 a straight plate connected to the substrate output unit 1 connected is. On the tray 10 is also a second stop 26 provided, which is at right angles to the first stop 25 and to the tablet surface 8th extends. The second stop 26 is designed as a wire hanger and transverse to the substrate transport direction A in the area 12 the tablet surface 8th appropriate. An adjustment can be made, for example via an unillustrated thumbwheel, the second stop along a linear guide, not shown in the tray 10 emotional. The adjustment can be done manually or automatically via a corresponding drive and control unit. Alternatively, the second stop 26 also stationary on the tray 10 to be appropriate. The second stop 26 may be carried out as a stop plate instead of a wire bow, which is provided for example with gas passage openings.

A substrate stack formed from a variety of substrates 6 , is due to such an arrangement, the tray surface 8th with the first and second stops 25 . 26 at the second stop 26 make a right angle, but at the first stop 25 be distorted, ie the stack has no 90 ° angle in this direction. This is because the first stop 25 and the storage area 12 the tablet surface 8th form an angle that is less than 90 °.

The tablet 10 is movable over a non-illustrated lifting unit up and down, wherein the movement parallel to a plane of the second stop 26 takes place as indicated by the double arrow B in 3 is shown.

In the 1 to 3 is the gas too driving device 3 to recognize that as a gas line element 30 is shown (in 4 it was omitted for simplicity of illustration). This is laterally adjacent to the higher edge of the tray 10 arranged and is fixed to the substrate output unit 1 appropriate. Alternatively, it could also be on the Substratablagevorrichtung 2 to be appropriate. The gas supply device 3 has a gas supply, which is not shown in the figures, which the gas line element 30 can act on gas. As a gas supply, for example, a fan or a compressed air connection of an external compressed air source can be used.

At a free end, the gas line element 30 a gas outlet opening in the form of a gas nozzle 34 on, which is arranged at the level of a storage level. The storage level is here, for a first from the substrate output unit 1 output substrate 6 , through the tablet surface 8th educated. For all following substrates 6 The storage level is in each case by the previously issued substrate 6 educated.

The gas nozzle 34 is essentially on an area between the first stop 25 and the second stop 26 directed. In particular, the nozzle is also slightly inclined downwards and one out of the nozzle 34 escaping gas stream overflows the storage level towards its lowest point in the area of the corner 18 of the tablet 10 , In that the second stop 26 spaced from the first stop 25 arranged and further designed as a wire bow, the gas stream at the opposite end of the tray can flow substantially unhindered.

The 5 to 8th show an alternative embodiment of a Substratablagevorrichtung 2 , In the 5 to 8th the same reference numerals are used as in the first embodiment according to the 1 to 4 , The substrate output unit 1 and the gas supply unit 3 which are also provided in this embodiment, may have the same structure as described above, so that a further description thereof is not made. The gas supply unit 3 was to simplify the presentation in the 6 and 8th omitted.

The substrate depositing device 2 in turn has a tray 10 , which is constructed as stated above. In particular, the tray has 10 a tablet surface 8th with each inclined to the horizontal first and second storage area 12 . 14 , In 7 it can be seen that the tablet surface 8th is also tilted about a first axis parallel to the substrate transport direction A to the horizontal. This causes the tray surface to fall 8th again in total to an edge 18 down, which is the lowest point of the support surface 8th forms.

Adjacent to the first storage area 12 of the tablet 10 is again a first stop 25 intended. Also is a second stop 26 on the tray 10 intended. However, this extends vertically and not perpendicular to the tray surface 8th as in the first embodiment, which is particularly in the 5 and 7 easy to recognize. As in 6 is clearly visible, is the second stop 26 on the side of the tray 10 , However, the second stop 26 also in this version movable in the storage area 12 or 14 the tablet surface 8th to be appropriate. In particular, the second stop 26 adjacent to a lower side edge of the tray 10 arranged. It is shown as a closed sheet metal, but could also be designed as a wire bow or as a perforated plate.

The tablet 10 is again on a non-illustrated lifting unit movable up and down, wherein the movement parallel to a plane of the second

9 shows a further alternative embodiment of a Substratablagevorrichtung 2 , In 9 the same reference numerals are used as in the first embodiment according to the 1 to 4 , The substrate output unit 1 and the gas supply unit 3 which are also provided in this embodiment, may have the same structure as described above, so that a further description thereof is not made. The gas supply unit 3 was to simplify the presentation in 9 omitted.

The substrate depositing device 2 in turn has a tray 10 in that it is constructed as stated above and is inclined to a lowest point. Also, first and second stops 25 . 26 provided, wherein the second stop 26 constructed according to the first embodiment. He could also have the structure according to the second embodiment.

The essential difference from the first two embodiments lies in the arrangement of the first stop 25 , The first stop 25 is so inclined that he with the storage area 12 of the tablet 10 forms a right angle. This forms one on the tray 10 located substrate stack both at its first stop 25 pointing edge as well as at its second stop 26 pointing edge a right angle.

The tablet 10 is again on a non-illustrated lifting unit movable up and down, wherein the movement of the inclination of the first stop 25 follows, as indicated by the double arrow D in 9 Darge is is. At the same time, the lifting movement is parallel to a plane of the second stop 26 ,

The following will now be a method for stacked storage of sheet-shaped substrates, in particular of substrates in a printing press with reference to the figures and in particular to the 1 . 3 and 9 explained in more detail.

A substrate 6 is about transport roles 4 the substrate output unit 1 in the substrate transport direction A in the region of the substrate depositing device 2 transported. In particular, the substrate is over the tray 10 promoted that is in an appropriate recording position. After a release of the substrate 6 through the transport rollers 4 the substrate falls onto the tray 10 down. The gas supply device 3 generates a gas flow under the falling substrate, which is directed transversely and slightly counter to the substrate transport direction. This creates an air cushion between a storage plane, which through the tray surface 8th or by a substrate located on the tray 6 is formed, and the falling substrate 6 ,

Due to the double inclination of the tray 10 (opposite and transverse to the substrate transport direction A) slides the substrate 6 slightly above the storage level in the direction of the first and second stops 25 . 26 and comes to lie to these. The movement towards the first stop 25 and the second stop 26 is also supported by the direction of gas flow, wherein the air cushion prevents or at least reduces friction between storage levels and substrate. The gas flow can be used intermittently or continuously.

In this way, the substrates can 6 be placed one after the other as a stack on the tray. After each substrate 6 or after a certain number of substrates 6 will the tray 10 via the lifting device along the first stop 25 and parallel to a contact surface of the second stop 26 lowered. Depending on the arrangement of the first and second stops 25 . 26 the lowering of the tray takes place 10 in a vertical direction or at an angle.

The oblique lowering of the tray 10 in conjunction with the perpendicular to the tray surface 8th standing second stop 26 This ensures that a glide path of the substrate 6 from a position immediately after being released by the substrate output unit 1 to the attacks 25 and 26 even after lowering the tray 10 remains essentially constant.

By outputting the plurality of substrates 6 on the tray 10 creates a substrate stack on the tablet surface 8th , which depends on the arrangement of the second stop 26 to this forms an angle which is either 90 ° (first embodiment) or less than 90 ° (second embodiment).

Lowering the tray 10 along the first stop 25 occurs depending on the arrangement of the first stop 25 also vertical or oblique. Forms the first stop 25 and the tray 10 , as in 1 shown, an angle of less than 90 °, there is the lowering of the tray 10 in the vertical direction. Whereas with an arrangement of the first stop 25 at right angles to the tray 10 , as in 9 shown, an oblique lowering of the tray 10 , along the first stop 25 , he follows.

A substrate stack on a substrate storage area 2 according to 9 was generated, thus has no distortions. This means that the substrate stack both to the first stop 25 towards the second stop 26 each with a 90 ° angle.

The The invention has been described above with reference to certain embodiments, without limited to the specific form shown. In particular it is possible Features of an embodiment to combine with features of another, or certain characteristics to be exchanged if compatibility is foreseen.

Claims (26)

Device for stacked storage of sheet-shaped substrates in a printing machine, comprising: a tablet for receiving the substrates, wherein the tray is a tray surface which, about a first axis and about a second axis, with respect to a Horizontal is tilted; a lifting device for lifting and Lowering the tray; a first stop with a first Contact surface; and one second stop with a second abutment surface, wherein the first and the second contact surface vertical each other and deposited on the tray substrates due tilting the tablet surface come to rest on the first and second contact surface, wherein the second stop is arranged perpendicular to the tray surface and the Lifting device is arranged so that it parallel the tray to the second contact surface raises or lowers. Apparatus according to claim 1, characterized ge indicates that the first axis is parallel to a substrate transport axis and the second axis is perpendicular to the first axis and lies in a plane parallel to the tray surface. Device according to Claim 1 or 2, characterized that a gas supply device provided with a gas outlet opening which is the lowest point of a storage level for the substrates directed. Device according to claim 3, characterized in that that the gas outlet in the amount of Storage level for the substrates is arranged. Device according to one of claims 3 or 4, characterized that the gas outlet directed to an area between the first and second abutment surface is. Device according to one of claims 3 to 5, characterized the gas supply unit has a gas nozzle. Device according to one of claims 3 to 6, characterized the gas supply unit has a fan. Device according to one of claims 1 to 7, characterized that the second stop, is arranged vertically. Device according to one of the preceding claims, characterized characterized in that the second stop is attached to the tray. Device according to one of the preceding claims, characterized characterized in that the second stop is adjustable. Device according to claim 10, characterized in that that the tray a linear guide for the second Stop has. Device according to claim 10 or 11, characterized that a thumbwheel is provided, via which the second stop is adjustable. Device according to one of the preceding claims, characterized characterized in that the second stop gas passage openings having. Device according to one of the preceding claims, characterized characterized in that the second stop comprises a wire bow. Device according to one of the preceding claims, characterized characterized in that the first stop part of a storage organ is over the substrates are placed on the tray. Device according to one of the preceding claims, characterized in that the first stop is inclined in such a way that this with a neighboring area of the tray surface a right Angle forms. Device according to claim 16, characterized in that that the lifting device lifts the tray parallel to the first contact surface or lowers. Device according to one of the preceding claims, characterized in that the tablet surface has a first and a second storage area which is different around the second axis tilted to the horizontal. Device according to one of the preceding claims, characterized characterized in that the second stop on the tray surface along the substrate transport axis is provided. Device according to one of the preceding claims, characterized characterized in that the second stop on the tablet surface transversely is provided to the substrate transport axis. Process for the stacked deposition of sheet-like substrates in a printing machine, comprising the following steps: Promote the arcuate Substrates to a substrate tray with a tray and a first and a second stop, the tray being about a first axis parallel to a substrate transport axis and about a second axis, which lies in a plane of the tablet and is perpendicular to the first axis, is rotated, and the first and second stops perpendicular to each other standing contact surfaces have, wherein the second stop arranged perpendicular to the tray surface is; and lowering the tray parallel to the second bearing surface. A method according to claim 21, characterized by generating a gas stream below a respective one on the Tray promoted Substrate, which is on an area between the first and the second Stop is directed. Method according to claim 21, characterized that the arcuate Substrate, transported by the tilt and the gas flow against the stops becomes. Method according to claim 23, characterized that the tray is lowered parallel to the second contact surface. Method according to one of claims 21 to 23, characterized in that the first stop is inclined so that it is a right with an adjacent portion of the tray surface Angle forms. Method according to Claim 24, characterized that the tray is lowered parallel to the contact surface of the first stop becomes.

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