EP1209110B1 - Device for obtaining a lateral displacement of transported flexible flat objects - Google Patents

Abstract

The device for producing an offset (2) in sheets of paper (3) comprises a lower (8) and an upper (9) roller, over which the sheets move. The lower roller can be swivelled so that its axis is no longer at right angles to the direction of motion of the sheets.

Description

The invention relates to a device for generating an offset of transported flexible sheet material, in particular paper sheets, with a supply and a laxative transport path section and a displacement generating means associated transport path section according to the preamble of claim 1.

Such a device for generating an offset can serve to offset a certain number of sheets in a delivery stack of a printing press, for example, to separate the sheets of a job from those of another job. However, such an offset can also serve to correct the storage of individual sheet goods with respect to the accuracy of the situation, so as to obtain a perfect delivery pile.

Devices of the type mentioned above are available in various designs. Side stops, transverse transport means have been proposed with transversely to the transport direction or obliquely arranged therewith rollers or balls or with transversely displaceable rollers. As an example of the latter proposal DE 43 13 840 C1 is called.

These proposals usually require a complex control and often a return of trained as a transverse transport means offset generating device in its original position, as is the case with the subject of DE 43 13 840 C1. Also, many of these suggestions are not independent of the paper format, which requires capturing and considering the format.

In addition, devices of the type mentioned are known from EP-A-0694492 and from US-A-2807465.

The invention is therefore the object of developing a device of the type mentioned so that sheets in a fundamentally similar manner can be offset format independent.

The object is achieved by the characterizing features of claim 1.

In the solution according to the invention, it is possible to achieve a certain offset by setting a certain angle. In this case, the offset generating means from an original position in which the angle γ to the transport direction of the Guts 90 ° is pivoted by an angle α in one or the other direction, depending on the direction in which the good is to be offset. A control or regulating device is not required, since each angle an offset caused thereby is directly attributable. It is therefore sufficient to calibrate an angle setting with the degree of the assigned offset. With this device, within a wide range for which the device can be used in terms of size, flexible sheet goods regardless of their format with respect to the position of their side edges are moved without the device must be set to the various formats. A reset requirement of the offset generator after each arc is not required because the offset generator operates continuously. Since the mechanism does not have to be constantly reset, it is simple and not prone to interference.

If the device is designed such that the incoming and outgoing transport path sections are not on parallel planes, then both a parallel offset and an angular offset are achieved, the latter being dependent on the angular position of the planes. The normal case, however, is that a parallel offset is desired for one of the purposes mentioned above. Therefore, it is proposed that the incoming and outgoing transport path section lie on parallel planes.

An expedient embodiment of the invention provides that the offset generating device is designed as a pivotable unit by an angle α. In this case, regardless of the specific embodiment of the offset generating device, a joint pivoting of all the parts in the whole can be made, which must be pivoted for the generation of the offset.

An embodiment provides that two deflections are provided, wherein one deflection to the other is in opposite directions. These two deflections may be formed as arcuate guides. It is possible that the two deflections are strung together in an S-shape or there may be a flat transport path between the two deflections.

An alternative embodiment provides that a plurality of deflections are provided, wherein at least two deflections deflect in a first direction and at least two in opposite directions. This embodiment has the advantage that less strong deflections are required. This is particularly advantageous for less flexible goods such as cardboard. However, a similar effect is also achieved in that the arcuate guides have a correspondingly large radius.

One possible embodiment provides that the transport path section assigned to the offset generating device has a flat surface lying between the deflections, which extends at an angle β of 90 ° to the other transport path sections. In this embodiment, the largest offset is generated by the adjustment by an angle α to the transport direction. In this case, the size of the offset is also dependent on the distance α from the distance h of the plane of the feeding transport path section to the level of the laxative transport path section. Thus, by increasing said area extending vertically in the height, the producible offset is also increased.

A further embodiment provides that the transport path section assigned to the offset generating device has an area lying between the deflections, which runs at an angle β of less than 90 ° to the other transport track sections. Although this design of the transport path of the offset generating means as an inclined plane leads on the one hand, that the offset achieved is lower, but this has the other hand, the advantage that the deflections are made at an obtuse angle and thereby less flexible material can be offset by means of the device This is the case for example with thick papers or cardboard. In this case, a combination with several deflections or deflections with large radii is possible.

A further embodiment provides that the offset generating device is designed with the deflections as a guide track with a guide gap between guide surfaces. Again, it can be provided that at the beginning and at the end of the guideway a pair of guide rollers is provided, which serves to convey the goods through the guideway. These guide roller pairs can then be assigned to the offset generating device or the feeding transport path section or the discharging transport path section. The guideway can be sheet-metal profiles, which can be S-shaped, even with a straight-line section, that is, a surface between the curves. The guideway may of course be all sorts of materials which have a low friction against the material to be transported and which can be designed with a very smooth surface. For example, the guide track can also be configured as an extruded aluminum profile and have a special sliding surface of the guide surfaces.

Since the flat material transported by the inclined position of the offset generating device is also inclined with respect to the front and rear edge, it is expedient if the pairs of guide rollers or the guide roller pair is adjusted accordingly. Therefore, it is proposed that the at least one pair of guide rollers of the offset generating device can be tilted in this way is that the inclination of the pair of guide rollers of the inclination of the leading edge of the sheet to be displaced laterally at the location of this at least one pair of guide rollers corresponds. This can be achieved. that the leading edge of a Guts is taken and transported simultaneously by two or more rollers and thereby unwanted skew is avoided by unequal gripping the front edge of the goods by pairs of drive rollers or a pair of rollers. This inclination in turn corresponds to the angle α, with which the offset generating means is set to produce a certain offset.

A specific embodiment of the inclination of a pair of guide rollers provides that a bearing which carries the pair of guide rollers, is pivotally mounted in a central region of the offset generating means and that a pivot mechanism to achieve the inclination of the pair of guide rollers whose pivoting with the pivoting of the offset generating means by the angle α connected. It can thereby be achieved that the leading edge of a product is grasped and transported simultaneously by two or more rollers and thereby an undesired inclination is avoided by non-simultaneous gripping of the front edge of the goods by pairs of drive rollers or a pair of rollers. The swivel mechanism can be configured in various ways. One proposal provides that the pivoting mechanism is a link which is hinged on the one hand to the bearing of the pair of guide rollers and on the other hand to a holder fixed to the machine housing, wherein the linkage is removed from the bearing of the axis of rotation to the pivoting of the bearing about the axis of rotation achieve.

Preferably, the pivoting mechanism is formed such that the respective pair of guide rollers with the inclined position is simultaneously offset laterally such that this offset corresponds to the offset of the good, this already has in the region of the pair of guide rollers. This ensures that the good is always held and guided at its edge regions. This serves for a safe guidance and a protection of the picture areas, if the good is printed. A proposal for a practical embodiment provides that the camp of the Guide rollers is supported by a pivot lever which is articulated to the offset generating means.

Appropriately, the aforementioned pairs of rollers are designed such that they are adjustable to the width of the goods. In this way, each format width can be optimally taken into account. Alternatively, the rollers may be formed as rollers having the maximum format width, then no change in format is required for format changes.

In all the above solutions is created by the inclination of the offset generating means an angular gap, which must be bridged by the area to be transported Good. Therefore, it may often be appropriate that transition guides are arranged at the transition from the feeding transport path section to the offset generating device and at the transition from the latter to the discharging transport path section. These transition guides must be designed so that they join the angular adjustments in the intended angle range. For example, the transition guide consist of rods which have a pivotable linkage on one side and a sliding guide on the other side. This may be pivotally suspended or designed such that the rods can pivot in it. Of course, further embodiments are conceivable, which join a pivoting movement, for example sheets, which are fixed on one side and mounted on the other side in a sliding guide.

It is possible to provide two relatively large pulleys, one for each deflection. As a result, a gentler diversion of goods is achieved. Alternatively, several smaller rollers may be provided, which make the deflections in two or more stages, which thereby take place in several shallow angles.

Fig. 1

eine Darstellung des der Erfindung zugrundeliegenden Prinzips,

Fig. 1a

eine Draufsicht auf Fig. 1,

Fig. 2

eine Darstellung zur Berechnung des durch die Erfindung erzielten Versatzes,

Fig. 3

eine schematische Darstellung eines Ausführungsbeispiels mit Rollen,

Fig. 4

eine schematische Darstellung eines Ausführungsbeispiels mit einer Führungsbahn,

Fig. 5

eine Weiterbildung des Ausführungsbeispiels gem. Fig. 4

Fig. 6

eine Ausgestaltung eines verstellbaren Führungsrollenpaares und von Übergangsführungen,

Fig. 6a

eine Einzelheit der Fig. 6,

Fig. 7

das Prinzip eines Ausführungsbeispiels mit Transportbändern,

Fig. 8

ein Ausführungsbeispiel mit einem Transportband und bogenförmigen Führungen,

Fig. 9

ein Ausführungsbeispiel mit einem Transportband und Rollen,

Fig. 10

eine perspektivische Darstellung eines weiteren Ausführungsbeispiels mit einem Transportband und einer Vielzahl drehbarer Walzen,

Fig. 10a

eine Einzelheit zu Fig. 10 und

Fig. 11a und 11b

eine perspektivische Darstellung eines Ausführungsbeispiels mit bogenförmigen Führungen und Führungsrollen gem. Fig. 8.

The invention will be explained below with reference to the schematic diagrams and exemplary embodiments illustrated in the drawing. Show it

Fig. 1

a representation of the principle underlying the invention,

Fig. 1a

a top view of Fig. 1,

Fig. 2

a representation for calculating the offset achieved by the invention,

Fig. 3

a schematic representation of an embodiment with rollers,

Fig. 4

a schematic representation of an embodiment with a guideway,

Fig. 5

a development of the embodiment gem. Fig. 4

Fig. 6

an embodiment of an adjustable pair of guide rollers and transition guides,

Fig. 6a

a detail of Fig. 6,

Fig. 7

the principle of an embodiment with conveyor belts,

Fig. 8

an embodiment with a conveyor belt and arcuate guides,

Fig. 9

an embodiment with a conveyor belt and rollers,

Fig. 10

a perspective view of another embodiment with a conveyor belt and a plurality of rotatable rollers,

Fig. 10a

a detail to Fig. 10 and

Fig. 11a and 11b

a perspective view of an embodiment with arcuate guides and guide rollers gem. Fig. 8.

Fig. 1 shows a representation of the principle underlying the invention. This principle consists in that in a device 1 for generating an offset 2 for flexible sheet material 3 takes place the supply and the discharge of the goods 3 at different levels and the flexible sheet 3 is therebetween supplied by means of a first deflection 8 and a counter-rotating deflection 9 of the other level. According to the invention, these deflections 8 and 9 are pivoted in the horizontal direction at an angle α in such a way that they assume an angle γ which is not equal to 90 ° with respect to the transport direction 4. It is thereby achieved that the material 3, when it is deflected by the feeding transport path section 5 on the transport path section 6 of the offset generation 10, is not perpendicular but obliquely transported upwards, such that the outer edges of the goods 3 also at the angle α from the vertical differ. As a result, depending on the height of the transport path section 6, an offset 2 is achieved after the good 3 has reached the laxative transport path section 7 after the counter-rotating deflection 9.

In the example shown, the axes 41 and 41 'of a deflection roller 40 and a counter-rotating deflection roller 40' are mounted on an offset generating device 10 which can be pivoted about an axis 33 by the angle α. In this case, the offset generating device 10 can be pivoted by the angle α as shown or to achieve an offset 2 to the other side in the other direction. In the embodiment of Fig. 1, the flexible sheet material 3 was drawn as a continuous band. This is an embodiment of the invention that is not possible with the prior art discontinuous displacement generation devices. As a rule, however, individual leaves are deflected in the manner mentioned. For this purpose, the invention provides a whole series of embodiments, which will be explained below. These embodiments have in common that they have means that guide individual sheets on said transport path sections 5, 6 and 7 safely by the sheets always by at least one pair of guide elements 13, 13 ', 13 ", 14, 14', 17, 17 ' , 18, 18 ', 19, 19', 20, 20 'are held and transported on both sides.

Fig. 1a shows a plan view of the device according. Fig. 1, wherein the offset generating means 10 is shown schematically and the achievable offset 2 by the Rotation of the offset generating means 10 by the angle α is again clarified.

FIG. 2 shows a representation for the calculation of the offset 2 obtainable by the invention, which is designated here as s or is calculated as s _ges = s-a.

First, for one embodiment, as shown in FIG. 1, the offset 2 - that is, s - is calculated as follows: The offset at the upper deflection 8 is s 'and is calculated from the height h and the angle α to s ' = tan α * h . Since s ' extends obliquely to the transport direction 4 by the angle α , the ratio s to s' is calculated as s = s ' * cos α . This results in the offset 2 $$s=\tan \mathrm{\alpha }*\cos \mathrm{\alpha }*H,$$

This applies to the embodiment of FIG. 1, that is, for the case that with respect to the illustration of FIG. 2, the angle β = 90 °.

If the transport path section 6 of the offset generation is inclined at an angle β, the offset 2 reduces to s _ges = s -a. For this a must be calculated. The angle β enters into this calculation. First, a is calculated as a = sin α * b, where b is the measure by which the deflection 8 is reset in the horizontal direction with respect to the deflection 9. b is again calculated as b = cos β * h , so that a yields: a = sin α * cos β * h. Thus, the offset is 2 $$s_{\mathrm{ges}}=H*\left(\tan \mathrm{\alpha }*\cos \mathrm{\alpha }-\sin \mathrm{\alpha }*\cos \mathrm{\beta }\right),$$

Fig. 3 shows a schematic representation of an embodiment with rollers. In this embodiment, the material 3, transported in the transport direction 4 by a plurality of rollers. Thus, the feeding transport path section 5 is assigned two pairs of rollers 13, which feed the goods 3 to a deflection roller pair 14. One of the roller pairs 13, the deflection roller pair 14, the guide roller pairs 13 "and the counter-rotating deflection roller pair 14 'are part of an offset generating device 10 which is tiltable at the angle α already described above. It is the transport path section 6, which is formed by the offset generating device 10. If such an inclination has been made by the angle α, then the good 3, after it leaves the counter-rotating Umlenkrollenpaare 14 ', the offset 2 on. It is thus on the laxative transport path section 7 offset offset by the offset 2 relative to the feeding transport path section 5 and optionally deposited with a different offset for each job 2 by the angle α is set accordingly.

FIG. 4 shows a schematic illustration of an exemplary embodiment with a guide track 15. Again, the rollers 13 and 13 'can be assigned to the transport path section 6 or to the feeding transport path section 5 and the discharging transport path section 7. The offset generating device 10 is equipped with a guideway 15 which generates the offset 2. This guideway 15 has deflections 8 and 9, which are formed as an arcuate guide 11 and a counter-rotating arcuate guide 12. The guideway 15 is formed by a guide gap 16 with guide surfaces 32 which have a low friction to Good 3. In this embodiment, the offset generating device 10 formed as a guide track 15 can be inclined by the angle α by being pivoted about the axis 33. In this case, the pairs of rollers 13 and 13 'must either be assigned to the offset generating device 10 and pivoted with this or it must be the distances of the guideway ends to the roller pairs 13 and 13' so large that such a pivoting is possible. If necessary, transition guides 35 can be provided, which will be described below. Of course, pairs of guide rollers 13, 13 'can both be assigned to the offset generating device 10 as well as provided upstream and downstream thereof. Since in this embodiment, the distance from a pair of guide rollers 13 to the next pair of guide rollers 13 'may not be greater than a sheet of goods 3 long, Fig. 5 proposes a development.

Fig. 5 shows an embodiment according to. 4, which is additionally equipped with a guide roller pair 13 "in the plane 21 of the transport path section 6 of the offset generating device 10. Of course, a plurality of guide roller pairs 13" are also possible. The distance from a pair of guide rollers 13, 13 ', 13 "on the other must be such that it is not greater than the length of a sheet of goods 3, so that this always by at least one, but preferably two guide roller pairs 13, 13' , 13 "is guided. Of course, in this as well as in the other embodiments, the transport direction 4 also extend in the opposite direction.

Since sheet of the sheet material 3 in the transport path section 6 of the offset generating means 10 are transported obliquely, so the sheet leading edge 22 is inclined by the angle α, the problem is a guide by horizontally arranged guide roller pairs 13 "in the plane 21 of the transport path section 6 in that the rollers 13 "do not engage the leading edge 22 at the same time and therefore there may be an unintentional change in position of the goods 3. Therefore, it is expedient to configure the pairs of guide rollers 13 "in such a way that they are likewise inclined in accordance with the oblique course of the leading edge of the sheet 22. The further development shown in FIG.

6 shows an embodiment of a guide roller pair 13 "which can be tilted in the plane 21 of the transport path section 6. In this representation, the remaining guide roller pairs 13 and 13 'as well as a possibly provided guide track 15 have been omitted, of course the guide roller pairs 13 and 13' can also be correspondingly provided be tilted when they are assigned to the offset generating device 10. The described embodiment of the tiltable guide roller pair 13 "can gem. Fig. 5 or gem. Fig. 3 may be provided. This may be one or more pairs of guide rollers 13 "or one or more pairs of guide rollers 13, 13 ', 13". For simplicity, only one pair of guide rollers 13 "has been shown.

In this embodiment, a pivoting mechanism 24 serves to pivot the pair of guide rollers 13 "in the plane 21 of the conveying path section 6 so as to be parallel to a leading edge 22. The pivoting is indicated by the arrows 47. It simultaneously runs at the same angle α, about which also the offset generating device 10 is pivoted, the latter being illustrated by means of the arrows 46. This pivoting takes place about the axis 33 and can be performed by means of a pivot drive 49.

In order for the guide roller pair 13 "to pivot by the same angle α , it is arranged on a bearing 30 which is connected to a pivoting lever 50. The pivoting lever 50 is pivotable on the offset generating device 10 in the region of its axis 33 about an axis of rotation 29 by means of a linkage 52 The pivoting lever 50 also achieves a lateral deflection of the guide roller pair 13 ", which is matched to the offset that the product 2 already has in the region of the guide roller pair 13. The rotation axis 29 extends essentially perpendicular to the surface 21 Bearing 30 of the guide roller pair 13 'performs a simultaneous displacement to the displacement generating device 10, a holder 27 is provided on the machine housing 26, on which the articulation 31 of a link 25 is arranged, which is connected at its other end by means of a linkage 28 with the bearing 30. In this case, both a distance of the linkage 28 from the axis of rotation 29 and an outward eccentric linkage 28 with respect to the bearing 30 is required to achieve movement of the bearing 30, which includes both the desired angular position α and the required offset. For this purpose, the length of the pivot lever 50, the length of the link 25 and the arrangement of the linkages 31 and 28 must be sized or arranged accordingly. These dimensions can be calculated by the skilled person or empirically determined. In order to ensure exact positioning of the guide roller pair 13 ", it is provided that the bearing 30 is guided at its ends by means of guides 48 which are connected to the offset generating means 10. These guides 48 must be designed such that they also allow the lateral offset ,

In order to achieve a clean transport of leaves of a good 3, it is further provided that between the offset generating means 10, the feeding transport path section 5 and the laxative transport path section 7 transition guides 35 are arranged. This may be, for example, a plurality of bars 36.

Fig. 6a shows a possible embodiments of such transition guides 35. The upper diagram shows a side view in section, the lower view is a plan view, wherein the sliding guide 38 is cut open. There are rods 36 mounted on one side by means of a pivotable linkage 37 and at the other end by means of a sliding guide 38. The latter must be designed such that it takes into account the pivoting of the offset generating device 10 in the direction of the double arrow 46 (FIG.

Fig. 7 shows the principle of an embodiment with conveyor belts. In this embodiment, a pair of conveyor belts 18, 18 'are associated with the infeed transport path section 5, another pair of conveyor belts 19, 19' the transport path section 6 of the offset generating device 10 and a third pair of conveyor belts 20, 20 'the discharging transport path section 7. This order applies to a transport direction in the direction of the arrow 4, wherein the sheet leading edge 22 is transported from right to left. With reference numerals after the slashes, an arrangement is referred to, which applies to a reverse transport direction. This means that the sheet trailing edge 23 then becomes the sheet leading edge 22 and the transport direction 4 turns over.

• Fig. 8 zeigt ein Ausführungsbeispiel mit einem einzigen Transportbandpaar 17, 17'. Die Umlenkungen 8, 9 erfolgen mittels bogenförmiger Führungen 11, 12. Die Rollenpaare 53, 53' führen und treiben ein oberes Transportband 17' und ein unteres Transportband 17. Sie sind unverschwenkbar im Maschinengehäuse 26 gelagert. Die Versatzerzeugungseinrichtung 10 besteht aus einer Führung, welche eine als bogenförmige Führung 11 ausgebildete Umlenkung 8 und eine gegenläufig arbeitende bogenförmige Führung 12 als Umlenkung 9 aufweist. Die rückführenden Trums der Transportbänder 17, 17' werden ebenfalls umgelenkt, damit der entgegengesetzte Versatz zur Ausgangslage zurückführt. Diese Führungsbahn 15 mit den bogenförmigen Führungen 11, 12 ist im Winkel α horizontal schrägstellbar, wobei sie in einer bereits in Fig. 1 aufgezeigten Art und Weise einen Versatz 2 der Transportbänder 17 und 17' erzeugt. Wird zwischen den Transportbändern 17 und 17' ein Bogen flächigen Gutes 3 transportiert, so erfährt dieser ebenfalls den Versatz 2 der Transportbänder 17 und 17'. Da die Transportbänder 17 und 17' an den Führungsflächen 32 der bogenförmigen Führungen 11 und 12 reiben, sind die Führungsflächen 32 mit einer sehr guten, beispielsweise polierten Oberfläche auszustatten. Der Vorteil der Führung mittels eines Transportbandpaares 17, 17' besteht darin, daß das Gut 3 zwischen diesen Transportbändern 17 und 17' unabhängig von der Formatgröße sicher gehalten und transportiert wird. Elemente, die der Zu- und Abfuhr des Gutes 3 dienen, wurden bei der Darstellung weggelassen. Zur Vermeidung der Reibung zwischen Transportbändern 17, 17' und der Versatzerzeugungseinrichtung 10 dienen die folgenden alternativen Ausgestaltungsformen:
• Fig. 9 zeigt ein ähnliches Ausführungsbeispiel wie die Fig. 8, bei dem jedoch die bogenförmigen Führungen 11 und 12 durch Umlenkrollen 40 und 40' ersetzt sind. Dabei ist eine der Umlenkrollen gegenläufig zur anderen. Im dargestellten Ausführungsbeispiel wird eine Umlenkung 8 durch die Umlenkrolle 40' und die andere Umlenkung 9 durch die Umlenkrolle 40 erzielt. Ein Versatz 2 wird hier dadurch erzeugt, daß die Achsen 41 und 41' der Umlenkrollen 40 und 40' um den Winkel α schräggestellt werden, wie dies bereits zu Fig. 1 erläutert wurde. Auch hier ist eine Transportrichtung 4 in beiden Richtungen möglich, wobei ein Gut 3 ebenso sicher - wie zu Fig. 8 beschrieben - transportiert wird, ohne daß dabei eine Reibung zwischen Transportbändern 17 und 17' und einer Führungsfläche auftritt. Durch eine entsprechende Größe der Umlenkrollen 40, 41' wird eine das Gut 3 schonende Umlenkung 8 und 9 erzielt. Auch hier muß ein entgegengesetzter Versatz der rückführenden Trums der Transportbänder 17 und 17' erzeugt werden. Dies ist zur Vereinfachung nicht dargestellt, kann aber ebenfalls mittels Umlenkrollen geschehen.
• Fig. 10 zeigt eine perspektivische Darstellung eines Ausführungsbeispiels, das nach dem bereits zu Fig. 9 beschriebenen Prinzip funktioniert. Der Unterschied besteht darin, daß statt der Umlenkrollen 40 und 40' mehrere Walzen 34 vorgesehen sind. Diese Walzen 34 sind derart angeordnet, daß sie zwei Umlenkungen 8 und 8' in der einen Richtung und zwei gegenläufig arbeitende Umlenkungen 9 und 9' bilden. Weiterhin dienen auch Walzen 34 zur Rückführung der Transportbänder 17 und 17'. Bei dieser Ausgestaltung sind alle Walzen 34 auf der Versatzerzeugungseinrichtung 10 angeordnet, welche ebenfalls um eine Achse 33 schwenkbar ist. In der Darstellung ist diese Schwenkung nicht erfolgt, wird diese vorgenommen, so wandern die Transportbänder 17 und 17' an einer Seite aus, wozu es erforderlich ist, daß die im Gehäuse 26 gelagerten Rollenpaare 53 oder 53' an dieser Seite den Versatz 2 der Transportbänder 17 oder 17' aufnehmen. Zu diesem Zweck müssen diese Rollenpaare 53 oder 53' entsprechend breit sein oder eine Ausgestaltung aufweisen, die in Fig. 10a dargestellt ist.
• Fig. 10a zeigt eine Rolle eines Rollenpaares 53 bzw. 53', die als Gummirolle 43 mit einem Gleitlager 44 ausgebildet ist. Sie läuft auf einer Welle 42 und kann sich auf dieser in Richtung des Doppelpfeils 45 verschieben. Dadurch verschiebt sich ein Rollenpaar 53 oder 53' um den Versatz 2, sobald dieser dadurch erzeugt wird, daß die Versatz-erzeugungseinrichtung 10 um die im Gehäuse 26 gelagerte Achse 33 um den Winkel α verschwenkt wird.
• Die Fig. 11a und 11b zeigen eine perspektivische Darstellung eines Ausführungsbeispiels mit einer Führungsbahn 15 mit bogenförmigen Führungen 11 und 12, wie dies bereits zu Fig. 8 erläutert wurde. Dabei zeigt die Fig. 11a eine nicht schräggestellte Versatzerzeugungseinrichtung 10 und die Fig. 11b die schräggestellte Versatzerzeugungseinrichtung 10, wobei diese Schrägstellung um die Achse 33 übertrieben dargestellt ist. Der Zuführung zu der Versatzerzeugungseinrichtung 10 dienen auch hier Führungsrollenpaare 13 und 13'.

In the illustrated embodiment, the deflections 8 and 9 take place in the transfer of a pair of conveyor belts to the other, so from the conveyor belt pair 18, 18 'to the transport hand pair 19, 19' and from this to the conveyor belt pair 20, 20 '. It is necessary that on the one hand enough space is available to make an inclination of the conveyor belts 19 and 19 ', on the other hand, this space must not be too large, so that the leading edge of sheet 22 safely from a band to others. Therefore, a transition guide similar to that described above can be inserted. It is also possible that such a transfer is avoided by only one conveyor belt pair 17, 17 'is provided. This is the subject of the following embodiments:

• Fig. 8 shows an embodiment with a single conveyor belt pair 17, 17 '. The deflections 8, 9 take place by means of arcuate guides 11, 12. The pairs of rollers 53, 53 'lead and drive an upper conveyor belt 17' and a lower conveyor belt 17. They are non-pivotably mounted in the machine housing 26. The offset generating device 10 consists of a guide, which has a guide 8 formed as an arcuate guide 8 and a counter-acting arcuate guide 12 as a deflection 9. The returning runs of the conveyor belts 17, 17 'are also deflected, so that the opposite offset returns to the starting position. This guideway 15 with the arcuate guides 11, 12 is inclined horizontally at an angle α, wherein it produces an offset 2 of the conveyor belts 17 and 17 'in a manner already shown in Fig. 1 way. If a sheet of flat material 3 is transported between the conveyor belts 17 and 17 ', then it also experiences the offset 2 of the conveyor belts 17 and 17'. Since the conveyor belts 17 and 17 'rub against the guide surfaces 32 of the arcuate guides 11 and 12, the guide surfaces 32 are to be provided with a very good, for example polished, surface. The advantage of the guide means of a conveyor belt pair 17, 17 'is that the Good 3 between these conveyor belts 17 and 17' regardless of the format size securely held and transported. Elements that serve to supply and discharge the goods 3 have been omitted from the illustration. To avoid the friction between conveyor belts 17, 17 'and the offset generating device 10, the following alternative embodiments are used:
• Fig. 9 shows a similar embodiment as Fig. 8, but in which the arcuate guides 11 and 12 are replaced by pulleys 40 and 40 '. One of the pulleys is opposite to the other. In the illustrated embodiment, a deflection 8 by the deflection roller 40 'and the other Deflection 9 achieved by the deflection roller 40. An offset 2 is generated here by the fact that the axes 41 and 41 'of the guide rollers 40 and 40' are inclined by the angle α, as has already been explained with reference to FIG. Again, a transport direction 4 in both directions is possible, with a good 3 as safe - as described for Fig. 8 - is transported without causing a friction between conveyor belts 17 and 17 'and a guide surface occurs. By a corresponding size of the guide rollers 40, 41 'is a Good 3 gentle deflection 8 and 9 achieved. Again, an opposite offset of the returning runs of the conveyor belts 17 and 17 'must be generated. This is not shown for simplicity, but can also be done by means of pulleys.
• FIG. 10 shows a perspective view of an exemplary embodiment which functions according to the principle already described with reference to FIG. 9. The difference is that instead of the deflection rollers 40 and 40 'a plurality of rollers 34 are provided. These rollers 34 are arranged so that they form two deflections 8 and 8 'in one direction and two counter-rotating deflections 9 and 9'. Furthermore, rollers 34 serve to return the conveyor belts 17 and 17 '. In this embodiment, all rollers 34 are arranged on the offset generating device 10, which is also pivotable about an axis 33. In the illustration, this pivoting is not done, this is done, the conveyor belts 17 and 17 'migrate on one side, for which it is necessary that the roller pairs 53 or 53' mounted in the housing 26 on this side the offset 2 of the conveyor belts 17 or 17 'record. For this purpose, these pairs of rollers 53 or 53 'must be correspondingly wide or have a configuration which is shown in Fig. 10a.
• 10a shows a roller of a roller pair 53 or 53 ', which is designed as a rubber roller 43 with a sliding bearing 44. It runs on a shaft 42 and can move on this in the direction of the double arrow 45. As a result, a pair of rollers 53 or 53 'shifts by the offset 2, as soon as this is generated by the offset-generating device 10 is pivoted about the axis 33 mounted in the housing 26 by the angle α.
• 11a and 11b show a perspective view of an embodiment with a guide track 15 with arcuate guides 11 and 12, as already explained with reference to FIG. 8. In this case, Fig. 11a shows a non-skewed offset generating means 10 and Fig. 11b, the inclined offset generating means 10, wherein this inclination is exaggerated about the axis 33. The feed to the offset generating means 10 serve also guide roller pairs 13 and 13 '.

The embodiments are largely schematic representations intended to explain the principle. In this case, the illustrated to Fig. 1 essence of the invention can be realized with a variety of embodiments. Of course, other arrangements of bands, guides, rollers or rollers are possible, as well as combinations of bands and guides or other combinations of the aforementioned the good leading or transporting elements.

LIST OF REFERENCE NUMBERS

1

Device for generating an offset

2

Offset (in the calculation: s or s _tot )

3

flexible flat good

4

Arrow: transport direction

5, 6, 7

transport path

5

feeding transport path section

6

Transport path section of offset generation

7

laxative transport path section

8, 8 '

deflections

9, 9 '

counter-rotating deflections

10

Offset generator

11

curved guide

12

counter-rotating arcuate guide

13, 13 ', 13 "

Pairs of guide rollers

13

Guide roller pair (s) in the plane of the transport path section 5

13 '

Guide roller pair (s) in the plane of the transport path section 7

13 "

Guide roller pair (s) in the plane of the transport path section 6

14

Deflection roller pair (s)

14 '

Pulley pair (e), working in opposite directions

15

guideway

16

guide gap

17

lower conveyor belt

17 '

upper conveyor belt

18

lower conveyor belt of the feeder

18 '

upper conveyor belt of the feeder

19

Lower conveyor belt of the offset area

19 '

Upper conveyor belt of the offset area

20

Lower laxative conveyor belt

20 '

Upper laxative conveyor belt

21

Surface of the transport path section of the offset generating device

22

Blade leading edge

23

Blade trailing edge

24

swivel mechanism

25

handlebars

26

machine housing

27

holder

28

Linkage of the handlebar to the bearing of a pair of guide rollers 13 "

29

Rotary axis of the bearing of a pair of guide rollers 13 "

30

Bearings of a pair of guide rollers 13 "

31

Linkage of the handlebar to the holder

32

guide surfaces

33

Axis about which the offset generating device is pivotable

34

rotatable rollers

35

Transition guides

36

rods

37

swiveling linkage

38

slide

39

recess

40

Guide pulley for conveyor belt

40 '

counter-rotating pulley for conveyor belt

41

Axle of the guide roller 40th

41 '

Axis of the counter-rotating deflection roller 40 '

42

wave

43

rubber roller

44

plain bearing sleeve

45

Double arrow: displacement of the rollers 39 '

46

Double arrows: Rotary movement of the offset generating device

47

Double arrows: pivoting of the guide roller bearing 30

48

Guiding the bearing 30 at the offset generating device

49

Rotary actuator

50

Swivel lever for storage 30

51

Offset of a pair of guide rollers 13 "

52

Linkage of the pivot lever 50

53, 53 '

Roller pairs for conveyor belts

α,

Pivoting angle of the offset generating device

β

Angle of the surface of the offset generating device to the incoming or outgoing transport path section

γ

Angle of the deflections to the transport direction

s

Offset 2 when β = 90 °

s _ges

Offset 2 when β ≠ 90 °

h (= R)

Difference in height of incoming and outgoing transport path section

s'

Offset measured in the line of the deflection

a

Correction to calculate the offset 2 when β ≠ 90 °

b

horizontal distance of the deflections

Claims (11)

1. Device (1) for generating an offset (2) of transported flexible sheet material (3), in particular paper sheets, said device comprising a supplying and a removing transport web section (5 and 7) and comprising a transport path section (6) associated with an offset-generating device (10); said offset-generating device (10) having at least two contradirectionally operating deflecting means (8, 9 or 8, 8', 9, 9') arranged in parallel, said deflecting means thus being movable into an angle (v) relative to the transport direction (4), said angle, when measured in the plane of the supplying transport path section (5) or when projected onto this plane, not being equal to 90°,
   characterized in that,
   in order to achieve the offset (2) of the sheet material (3), guide element pairs (13, 13', 13", 14, 14', 17, 17', 18, 18', 19, 19', 20, 20') are arranged in such a manner that the sheets are always held on both sides and transported by at least one guide element pair (13, 13', 13", 14, 14', 17, 17', 18, 18', 19, 19', 20, 20');
   the guide means for the sheet material (3) consists of several roller pairs (13, 13', 13", 14, 14'), of which one part is configured as the guide roller pairs (13, 13', 13") and one part is configured as the deflecting roller pairs (14, 14'), and of which at least the latter rollers can be moved, with respect to their angle relative to the transport direction (4), into an angle (γ) that does not equal 90°; and
   at least one guide roller pair (13, 13', 13") acts as the drive roller pair to transport the sheet material (3) in the region of the offset-generating device (10).
2. Device as in Claim 1, characterized in that the supplying and removing transport path sections (5 and 7) are on parallel planes.
3. Device as in Claim 1 or 2, characterized in that the offset-generating device (10) is configured as a unit that can be pivoted by an angle (α).
4. Device as in one of the Claims 1 through 3, characterized in that two deflecting means (8, 9) are provided.
5. Device as in Claim 4, characterized in that the two deflecting means (8, 9) are configured as arcuate guide means (11, 12).
6. Device as in Claim 5, characterized in that the two deflecting means (8, 9) are arranged adjoining each other in S-form.
7. Device as in one of the Claims 1 through 3, characterized in that several deflecting means (8, 8', 9, 9') are provided, at least two (8, 8') of said deflecting means deflecting in a first direction and at least two (9, 9') of said deflecting means deflecting in a contradirectional direction.
8. Device as in one of the Claims 1 through 7, characterized in that the transport path section (6) associated with the offset-generating device (10) has a surface (21) located between the deflecting means (8 and 9 or 8, 8' and 9'), said surface extending at an angle (β) of 90° relative to the other transport path sections (5 and 7).
9. Device as in one of the Claims 1 through 7, characterized in that the transport path section (6) associated with the offset-generating device (10) has a surface (21) located between the deflecting means (8 and 9 or 8, 8' and 9'), said surface extending at an angle (β) of less than 90° relative to the other transport path sections (5 and 7).
10. Device as in Claim 1, characterized in that at least one guide roller pair (13, 13', 13") of the offset-generating device (10) can be set at such a pitch that the pitch of the guide roller pair (13, 13', 13") corresponds, at the location of this minimum of one guide roller pair (13, 13', 13"), to the pitch of the lead edge (22) of the material (3) that is to be laterally offset.
11. Device as in Claims 3 and 10, characterized in that a bearing (30) supporting the guide roller pair (13, 13', 13") is pivotably supported on the offset-generating device (10), and that a pivoting mechanism (24), in order to achieve the pitch of the guide roller pair (13, 13', 13"), links the pivoting motion of said guide roller pair (13, 13', 13") with the pivoting motion of the offset-generating device (10) by the angle α.

Images