EP1514821A2 - Guiding roll for guiding a material web - Google Patents

Abstract

A motor is provided for displacing the piston. A control switch (53) operates the motor such that the piston takes in the desired position which is defined by the control signal. The control switch feeds the control signal with the position of the edge of the material web (09). A detector which is displaceably coupled to the piston supplies the control signal. The detector comprises a photocell. An independent claim is also included for the method of adjusting the turning bar.

Description

The invention relates to a guide roller for guiding a material web according to the Preamble of claim 1.

Guide rollers of this type are used in particular at the exit of a rotary printing machine used, if applicable, several partial webs, in which one of the Rotary printing machine printed paper web has been cut, and the lying side by side leave a cutting device, so to redirect that they one above the other, possibly folded and further processed.

DE 34 36 870 C1 discloses a turning bar with axially displaceable piston.

By the US 54 64 143 A turner bars are known which with a compressed air-supplied interior are formed. The coat of the turning bar is on At least a part of its circumference provided with holes, through the air from the Interior space can escape to an air cushion between the turning bar and the To form material web.

In the interior of this known turning bar pistons are axially displaceable, depending after their position in the turning bar a more or less large number of holes obstruct, so as to the width of the air cushion generated on the turning bar to the Adjust the width of the material web to be deflected thereon.

Such an adjustment is necessary because compressed air, not by the Material covered holes of the jacket escapes, leads to an undesirable Weakening of the air cushion, that of the holes covered by the material web is generated, so that in the case of a narrow material web, the air cushion effect can be insufficient. In addition, the leaking through uncovered holes Air currents disturb the course of adjacent material webs.

However, can be with the known from the above-mentioned turner bar no optimal adaptation of the shape of the air cushion to the course of the material web to reach. The reason for this is that the piston inner sides are flat, whereas the Edge of a on the turning bar typically to be deflected by 90 ° web on the coat of the turning bar follows a helix. If you set the pistons like that, that all holes not covered by the material web are blocked, this results in Edge region of the material web triangular zones in which the web is not completely from an air cushion is supported. Adjust the pistons so that the entire path of an air cushion is supported, so inevitably compressed air supplied holes remain uncovered.

To avoid this problem, pistons are used, which at their the interior facing side are not plan, but have edges, their course respectively one half of its scope to a right-handed and the other half to one corresponds to left-handed helix. The pistons are in the turning bar around their Rotatable axis, so that, depending on which direction the material web is deflected, one or the other of the two helical edges to the perforated Part of the circumference of the shell can be turned out, which is to be deflected by the Material web is entwined.

With such a shaped piston, the available compressed air can be optimally Take advantage of the material web on its way around the turning bar on its entire Width homogeneously supported by an air cushion, and leakage of air currents uncovered holes is avoided. To take advantage of the above-mentioned US Patent to fully exploit the described piston as well as the piston described here, it is necessary, each time the turning bar for deflecting a web with changed width to be used, the position of the piston exactly to this width adapt. Even if not the width, but only the deflection of the Material web is changed, this can be a readjustment of the position of the piston require. This process is very laborious and cumbersome because of the piston in the Inside the coat of the turning bar is not visible. Although one can Operator, as long as no path is passed over the turning bar, possibly in look in the holes and see if a hole is blocked by a piston or not, however, as soon as the web is passed over the turning bar, there are none More possibility to check if all holes covered by the web are actually free, so that the air cushion is produced on the required width.

JP 11-246098 A describes a loadable with air guide roll whose coat with Holes is provided. These holes are hydraulic by means of one in the interior slidable locking element depending on a web width selectively closed. For detecting the web width sensors are arranged.

The invention is based on the object, a guide roller for guiding a web to accomplish.

This object is achieved by the features of claim 1.

The achievable with the present invention consist in particular that a Adjustment of the position of the piston to the width or the position of a material web the guide roller can be done quickly and selectively. Even an adjustment of the position of Piston to a web displacement while the web is running is readily possible.

To achieve these benefits is a motor for moving the piston and a Control circuit provided which operates the motor so that the piston through a the control circuit supplied control signal defined target position occupies. When Control signal for the control circuit come in particular two types of signals Consider, on the one hand, a quantitative signal, d. H. a signal with a numerical value can be assigned and that allows the control circuit, the engine so long to operate until the piston has reached a position corresponding to the numerical value, on the other hand, a signal with at least two discrete states, one of which as can be called "forbidden" and the other as "allowed" state, in which case the controller may be to operate the engine until the signal in goes over the "allowed" state.

The first type of control signal is particularly suitable for attaching it to one of the guide rollers upstream, the web-processing device such as a Tapping tool, whether by measuring the position of a device, the determines the position of a web edge or directly by deriving from a control signal, which determines the position of such a device.

It is also possible, the position of an edge of the material web by means of a sensor directly determine or that the target value from a memory device z. Eg control room is given.

A control signal of the second type can preferably by means of a to the respective Position of the piston coupled movable detector to detect the position of the Web edge are generated. The coupling can be a mechanical connection between piston and detector include; but it comes, especially if the Detector of the guide roller is arranged on the path of the material web, a control technology coupling into consideration.

The quick and targeted adaptability of the piston position is particularly important in a pivotable guide roll, the deflection of the web optionally in two different directions allowed. The process of positioning the piston can be so be fully automated, making the switch to different web widths and optionally deflection directions further simplified.

Another advantage is that after a pivoting of the guide roller a separate Operation of turning the pistons to adapt their edge profile to the Course of the web edges deleted.

In order to avoid leakage of compressed air through the slot, can advantageously by the air pressure of the interior against the edges of the slot pressed sealing tape be provided. To obstruct the movement of the wearer through the To avoid sealing tape, the latter is preferably coupled to the piston and before the Slidable.

Alternatively, the detector may also be within the piston for detecting presence or absence of the web of material in front of one of the holes.

If the guide roller can be pivoted by 90 ° about an axis perpendicular to its longitudinal axis is to redirect a web optionally in opposite directions, so describe the edges of the material web on the surface of the guide roller depending on Direction of turning a left-handed or a right-handed helix. By a axial rotation of the piston can always be that portion of the piston edge whose Direction of rotation corresponds to the web edge, with the perforated peripheral region of the Mantels are brought into contact so as to coincide with the course of the web edge congruent course of the edge of the piston to achieve.

To quickly adjust the rotational position of the piston to the respective deflection can, is the axial rotation of the piston preferably by a gear to the Pivoting movement of the guide roller coupled.

Embodiments of the invention are illustrated in the drawings and are in described in more detail below.

Fig. 1

eine schematisierte Draufsicht auf die Leitwalze

Fig. 2

eine Seitenansicht auf die Leitwalze aus Fig. 1 in Richtung des Pfeils II

Fig. 3

einen Teilschnitt durch den in Fig. 1 mit III gekennzeichneten Bereich der Leitwalze

Fig. 4

einen Querschnitt durch die Leitwalze entlang der Line IV-IV aus Fig. 1

Fig. 5

einen Schnitt durch den Endbereich der Leitwalze aus Fig. 1

Fig. 6

den mittleren Bereich der Leitwalze in einem axialen Schnitt

Fig. 7

einen Schnitt analog dem der Fig. 5 durch den Endbereich einer Leitwalze gemäß einer zweiten Ausgestaltung

Fig. 8

einen Querschnitt durch eine Leitwalze gemäß einer dritten Ausgestaltung

Fig. 9

eine schematische Darstellung von Leitwalzen und ihrer Steuerung

Show it:

Fig. 1

a schematic plan view of the guide roller

Fig. 2

a side view of the guide roller of Fig. 1 in the direction of arrow II

Fig. 3

a partial section through the marked in Fig. 1 with III area of the guide roller

Fig. 4

a cross section through the guide roll along the line IV-IV of FIG. 1

Fig. 5

a section through the end region of the guide roller of Fig. 1st

Fig. 6

the central region of the guide roll in an axial section

Fig. 7

a section analogous to that of FIG. 5 through the end region of a guide roller according to a second embodiment

Fig. 8

a cross section through a guide roller according to a third embodiment

Fig. 9

a schematic representation of guide rollers and their control

The guide roller shown in Fig. 1 in plan view, z. B. turning bar 01 is a cylindrical Hollow body, by a on his coat 02 approximately centrally acting arm 03 connected to a frame (not shown). The support arm 03 has a hinge 04, a pivoting movement of the turning bar 01 to one to the plane of Fig. 1st vertical axis by an angle of 90 ° permits. The turning bar 01 is with the Joint 04 connected by a connector 06, which in the end positions of Pivoting freedom of the turning bar 01 each to one of two attacks 07 of the support arm 03 abuts. The stops 07 are each adjustable in length to the Freedom of movement of the turning bar 01 to adjust to exactly 90 °.

Through the support arm 03, the joint 04 and the connector 06 runs a Compressed air supply line (not shown) through which an interior of the turning bar 01 with Compressed air is supplied. This interior is on the one hand by the jacket 02 and the other by two in the shell 02 axially displaceable locking elements, z. B. piston 17th limited, the structure of which will be discussed in more detail later with reference to FIG. Of the Jacket 02 is on the side facing away from the connector 06 half of its circumference a regular array of holes 08 provided by the compressed air from the Interior can leak to an air cushion for one on the turning bar 01 to form deflected web of material 09. This material web 09 is transparent in FIG. 1 drawn, their edges 11 are shown as dashed lines.

At the side facing away from the holes 08 back of the shell 02 are on both sides of the Connector two slots 12 in the longitudinal direction of the turning bar 01 with a Length I formed, one of which can be seen in the side view of FIG. These Fig. 2 shows a view of the turning bar 01 in the direction of the arrow II of Fig. 1. By each slot 12 extends a rod 13, the detector holder 14 and 15 with a the two previously mentioned piston 17 connects inside the turning bar 01. Of the Detector holder 14 here has the shape of a frame with a slot in which a Detector unit of two photocells 16 parallel to the longitudinal axis of the turning bar 01 is held adjustable. As can be seen in Fig. 2, one of the two photocells 16 is after above, the other oriented downwards. In the position shown in Fig. 1 detects the after bottom oriented photocell 16 of the detector holder 15 an edge 11 of the expiring Material web 09. The upwardly oriented photocell 16 in the detector holder 14 detects a Edge 11 of the incoming material web 09.

When the turning bar 01 from the illustrated in FIG. 1 by solid lines End position is pivoted by 90 ° in its other end position shown in dashed lines, Thus, the upwardly oriented photocell 16 of the detector holder 15 detects an incoming Edge 11, and the downwardly oriented photocell 16 of the detector holder 14 detects a leaking edge 11.

Fig. 3 is a partial section through the turning bar 01 of FIG. 1 in which in Fig. 1 with III marked area. This partial section shows a part of the internal structure of the Turning bar 01 and in particular one of the two axially displaceable piston 17th The plane of the section is indicated by the dot-dashed line in FIG. 2 specified. It can be seen in the section clearly the holes 08 and the slot 12 in Coat 02 of the turning bar 01.

The piston 17 is in Fig. 3, left of the longitudinal axis X-X of the turning bar 01 in Top view and right of the longitudinal axis shown in section. He's about the shape a cup with a bottom 18 and a side wall 19, whose the interior 21st facing edge by two helical sections 22; 23 with each opposite direction of rotation is formed. In the position of the piston 17 shown here has the holes 08 facing portion 22 a right-handed and the Slot 12 facing portion 23 a left-handed direction of rotation.

In this orientation of the piston 17, the edge portion 22 is exactly parallel to an in the position shown in Fig. 1 the turning bar 01 to this looped web edge 11.

To bring the course of the edge portion 22 with the web edge 11 exactly in line to be able to, is an axial displaceability of the piston 17 in the interior of the turning bar 01 required. For this purpose, a threaded spindle 24, which is threaded in the bottom 18 of the piston 17 is engaged and of a shown in Fig. 5 in more detail Adjusting means, for. B. Motor 36 is rotated. A second, by the same engine 36 rotatably driven threaded spindle 26 passes through a threaded opening without an opening in Bottom 18. It engages with a thread in the bottom 18 of an analogous to the piston 17 formed second piston 17, the piston 17 diametrically opposite in the turning bar 01 is housed.

A rod 27 with a square cross-section extends along the axis X-X and with slight play through an opening in the bottoms 18 of both pistons 17. It is equipped with a in Fig. 6 shown gear 44, 46, 27 fixedly connected and serves to rotate the piston 17 about the axis X-X in the event of pivoting of the turning bar 01 between their two stop positions.

In the vicinity of the bottom 18, an annular groove 28 is formed in the side wall 19, in which a Ring 29 is rotatable. The ring 29 is fixedly connected to the already mentioned rod 13, where the detector holder 14 is disposed. Through the ring 29, it is possible to To rotate the piston 17 about the axis X-X without the detector holder 14 this Must follow rotational movement. On the rod 13, a sealing strip 31 is also added, the extends over the entire length 21 of the slot 12 open towards the interior.

Fig. 4 shows this arrangement in a section at the level of line IV-IV in Fig. 1. The Sealing strip 31 is in its entire thickness in grooves 32 on both sides of the Slit 12 is inserted so that it does not affect the rotation of the piston 17. A bracket 33 may at the connector 06 facing the end of the slot 12th be attached, the sealing strip 31 in a non-pressurized Condition of the interior 21 keeps pressed against the jacket 02 and so ensures that this unfolds its sealing effect when compressed air is placed in the interior 21 becomes.

Fig. 5 shows a section along the longitudinal axis X-X of the turning bar 01 through the in Fig. 1 with 34 designated end portion 34. In this end portion 34 is the already mentioned engine 36 housed in a chamber, which in the direction of the piston 17 back (Upwards in Fig. 5) is limited by a plate 37. The plate 37 is using a Rolling bearing 38 rotatably held in the shell 02. The rod 27 is connected to the plate 37 rotatably engaged. The threaded spindles 24; 26 are rotatable by the plate 37 carried out and contribute at their ends in the interior of the chamber respectively Drive wheel 39; 41. One to the drive wheels 39; 41 complementary wheel 42 is at the Drive shaft 43 of the motor 36 mounted. The drive shaft 43 is in the direction of Longitudinal axis X-X displaceable between the position shown in Fig. 5, in which the wheel 42 with the drive wheel 39 is engaged, and an engaged position with the drive wheel 41st By a selective displacement of the drive shaft 43, the motor 36 can thus optionally used to displace both pistons 17. The wheels 39; 41; 42 can Friction wheels or gears; to facilitate the intervention of the wheels into each other, the drive wheels 39; 41 frusto-conical and the wheel 42 be formed double frustoconical.

When the turning bar 01 is pivoted to the direction of deflection of the material web 09 to change, this requires, as already stated above, a rotation of the piston 17th around 180 °. The threaded spindles 24; 26 follow this rotation, so that in Fig. 5 the Change seats. The motor 36 is not rotated while the intervention of the Rades 42 with one of the drive wheels 39; 41 remain in this rotation. Of course, the selective adjustment of both pistons 17 by means of only one Motors 36 also using a different clutch mechanism than the above described causes. It is also conceivable, each threaded spindle 24; 26 one assign own engine, which then at the end of the turning bar 01 attached, which is adjacent to the driven by the engine piston.

This motor can be arranged stationary or so that it is a rotational movement of the Rod follows.

Fig. 6 shows a transmission for driving a 180 ° rotation of the piston 17 in the case of Pivoting movement of the turning bar 01 from one of its working positions to the other. The reference numeral 44 denotes a section of a gear or Gear segment, which is housed in the connector 06. This gear or gear segment 44 may be arranged stationarily in the connector 06, it However, could also be coupled to the position of the turning bar 01 such that it in the case of a pivoting movement of the turning bar 01 performs a self-rotation. This gear or gear segment 44 meshes via a helical toothing with a another gear 46 which is rotatable about the longitudinal axis X-X of the turning bar 01 and that is the free cross section of the interior 21 of the turning bar 01 substantially fills. This gear 46 is in Fig. 6 to the left of the longitudinal axis X-X in section and shown to the right of the axis in plan view. It is firmly connected to the rod 27. The Threaded spindle 26, which is used to drive the piston 17 to that of the motor 36th facing away from the turning bar 01 is through a bore of the gear 46th freely rotatably guided. The threaded spindle 24, which is used to drive the motor 36 adjacent piston 17 is rotatably supported in the gear 46. The gear or gear segment 44 and the gear 46 are designed so that they have a Pivoting movement of the turning bar 01 by 90 ° about the axis of the joint 04 in one 180 ° rotation of the gear 46 and thus the piston 17 implement. That's how it works shown in Fig. 6 gear 44, 46, 27, that the piston 17 in each of the two Working positions of the turning bar 01 in each adapted thereto Drehorientierung are located.

To adjust the turning bar 01 to the leadership of a new material web 09, can z. B. proceed as follows. First, the piston 17 in their in each case the ends of the turning bar 01 adjacent stop position method. In In each case, the detectors are not located above the turning bar 01 in these positions guided material web 09 opposite. One from the detector unit in this state supplied signal level is considered as "prohibited" level. Subsequently, the Piston 17 from the stop positions in each case as far as the center of the turning bar 01 out until the detector unit of the piston 17 registers a web edge 11 and its Output signal changes to a "permitted" level. Because in each of the two Working positions of the turning bar 01 from the two photocells 16 of each detector unit only one of a web edge 11 may be opposite, it is sufficient for the evaluation of Detector signal, an OR link of the two photocells 16 each Detector unit to evaluate generated signals to reach the web edge 11th to be detected by the detector unit. To increase the detection reliability, can Also be provided that, depending on the working position of the turning bar 01 of the two Photocells 16 of each detector unit only one is operated. A control circuit, the performs this task is not shown in FIG. 6 specifically.

If the position of the detector unit in the detector holders 14, 15 is correctly adjusted, then corresponds at the moment when the detector unit registers a web edge 11, the Position of the outside of the shell 02 facing edge portion 22 or 23 of the Piston 17 exactly the course of the edge 11 of the web 09 on the turning bar 01. Thus, the two pistons 17 cut all those holes 08 on the shell 02 of the Turning bar 01 from the compressed air supply from the interior 21, which is not from the Material web 09 are covered; however, below the material web 09, a can full-surface, homogeneous air cushion can be generated.

Fig. 7 shows a section through the end portion of a turning bar 01 according to a second embodiment of the invention. The position of the cut is the same as in FIG. 5. Elements that are in shape or function the elements of the above Embodiment correspond, are provided with the same reference numerals. The Plate 37 is rotatably connected here with the jacket 02, the rod 27 is rotatable on the Plate 37 stored. The motor 36 drives via the wheels 42; 39 only the spindle 26 of the one Piston 17 on; a corresponding engine for the other piston is located at another end of the turning bar 01. A through a slot 47 in the jacket 02nd engaging wheel 48 is engaged with the wheel 42; it transmits a turn of the Motors 36 held on a outside of the turning bar 01 parallel to this Threaded spindle 49. This threaded spindle 49 drives a (not shown in FIG. 7) Detector holder as the detector holder 14 of FIG. 1 at a to the movement of the Piston 17 coupled movement.

Fig. 8 shows a third embodiment of the turning bar 01 in a cross section. Of the significant difference between the embodiment described above and the Embodiment of Fig. 7 is the arrangement of the detectors. With the detectors it can in turn, for example, to photocells 16 act. These photocells 16 are at the Embodiment of Fig. 8 arranged inside the turning bar 01, and indeed they are each in the side wall 19 of the cylinder 17 in each case in the vicinity of the edge portion 22; 23 so that they can detect the presence of the web 09, provided that Detectors are located in front of one of the holes 08. Although in this embodiment, the Accuracy with which the position of the web edge 11 can be detected on the distance the holes 08 limited in the axial direction, but does this the functionality of Device no demolition, since the piston 17 in the interior of the turning bar 01 to just This distance can be shifted without affecting the number of open or locked holes 08 changes.

In this embodiment, the detector is in particular also a flow sensor applicable, which registers the flow of air from the interior 21 to the outside, if he passes a hole 08 that is not covered by the web 09.

Fig. 9 shows a schematic representation of turning bars 01 and their control. A plurality of turning bars 01, the z. B. following a cutter are arranged, in which a web of material 09, in particular a printed paper web 09, is cut into a plurality of partial webs 09, each of a Turning bar 01 are deflected. The position of the individual rotating blades 51 the cutting device is adjustable at a control station 54. A control signal that the Indicates target position of each blade 51, (not shown) actuating units of the knife 51st supplied via a signal line 52. This control signal, which at the same time also the location the edges 11 of the section webs 09 cut by the knives 51 become defined a control circuit 53 is branched, the thereof taking into account the positions the - adjustable transverse to the web direction - turning bars 01 each have a desired position the cylinder inside the turning bars 01 calculates and controls the motors to to approach this target position.

Alternatively, the control signal could also be obtained by means of position detectors be the position of the knife 51 or the web edges 11 generated by them in measure the cutter.

In order to set the thus calculated target position, the control circuit can the actual position holding each cylinder in a memory, the difference between the two Calculate positions and each motor at a known rotational speed for so long operate until the piston has moved from the actual position to the desired position would.

Alternatively, an operating state of the control circuit may be provided, in which the Control circuit for adaptation to a changed web width or a modified one Position of the turning bars first moves each piston in a stop position. If this is reached, is changed to a control state in which the control circuit out of this exactly known stop position out the target position by operating of the motor for a calculated rotation angle or a calculated time at known Turning speed approaches.

LIST OF REFERENCE NUMBERS

01

Guide roller, turning bar

02

coat

03

Beam

04

joint

05

-

06

joint

07

attack

08

holes

09

web

10

-

11

Edge (09)

12

slots

13

Bar, carrier

14

detector holder

15

detector holder

16

photocell

17

Locking element, piston

18

ground

19

Side wall

20

-

21

inner space

22

edge section

23

edge section

24

screw

25

-

26

screw

27

pole

28

ring groove

29

ring

30

-

31

sealing strips

32

recruitment

33

hanger

34

end

35

-

36

Adjusting means, engine

37

plate

38

roller bearing

39

drive wheel

40

-

41

drive wheel

42

wheel

43

drive shaft

44

Gear / segment (06)

45

-

46

gear

47

slot

48

wheel

49

screw

50

-

51

knife

52

signal line

53

control circuit

54

control station

I

length

X X

longitudinal axis

Claims (24)

Guide roller (01) for guiding a material web (09) having a at least on a part of its circumference with holes (08) provided jacket (02) and a compressed air fed interior (21), wherein at least one blocking element (17) for selectively blocking the Holes (08) is arranged, wherein at least one adjusting means (36) for positioning the locking element (17) is arranged in a defined position of an edge of the material web (09) defined position, characterized in that a with the blocking element (17) coupled displaceable detector is arranged. Guide roller (01) according to claim 1, characterized in that the blocking element (17) is designed as an axially displaceable piston (17). Guide roller (01) according to claim 1, characterized in that the adjusting means (36) is designed as a motor (36). Guide roller (01) according to claim 1, characterized in that the guide roller (01) is designed as a turning bar (01). Guide roller (01) according to claim 1, characterized in that a control circuit (53) is provided, that a control signal of the control device (53) is a quantitative signal, and that the control circuit (53) the adjusting means (36) operates until until a rotary travel corresponding to the control signal is covered. A guide roll (01) according to claim 1, characterized in that the control signal is a signal with two discrete states, and that the control circuit (53), if the control signal has a prohibited state, the adjusting means (36) operates until the control signal goes into a permitted state. Guide roller (01) according to claim 5 or 6, characterized in that the control circuit (53) has an operating state for displacing the piston (17) in an end position independent of the control signal. Guide roller (01) according to claim 1, characterized in that the detector comprises a photocell (16). Guide roller (01) according to claim 1, characterized in that the detector is mounted on the piston (17). Guide roll (01) according to claim 9, characterized in that the jacket (02) of the guide roll (01) has a slot (12) and that the detector is arranged outside the jacket (02) and via a slot (12) passing through carrier ( 13) is connected to the piston (17). Guide roller (01) according to claim 10, characterized by a by the air pressure of the inner space (21) against the edges of the slot (12) pressed sealing strip (31). Guide roller (01) according to claim 11, characterized in that the sealing band (31) is coupled to the piston (17) and in front of the slot (12) is displaceable. A guide roll (01) according to claim 9, characterized in that the detector (16) is mounted within the piston (17) for detecting the presence or absence of the web (09) in front of one of the holes (08). Guide roller (01) according to claim 1, characterized in that the guide roller (01) on a frame about a transverse to its longitudinal axis pivot axis is pivotable by 90 °. Guide roll (01) according to claim 14, characterized in that the piston (17) is rotatable about the longitudinal axis of the guide roll (01), with a gear (44; 46) for coupling the rotational movement of the piston (17) to the pivoting movement of the guide roll (01). Guide roller (01) according to claim 15, characterized in that the gear (44, 46) converts the 90 ° pivoting movement of the guide roller (01) in a 180 ° rotation of the piston (17). Guide roller (01) according to claim 15 or 16, characterized in that the transmission (44, 46) comprises a about the longitudinal axis (XX) rotatable, with a fixed relative to the pivot axis toothing (44) meshing ring gear (46). Guide roller (01) according to claim 17, characterized in that the stationary toothing (44) engages through a slot of the jacket (02) in the inside of the shell (02) arranged sprocket (46). Guide roller (01) according to one of claims 15 to 18, characterized in that the transmission comprises a non-circular rod (27) on which the piston (17) is guided in a rotationally fixed and axially displaceable manner. Guide roller (01) according to one of claims 15 to 19, characterized in that the adjusting means (36) is rotatable together with the piston (17). Guide roller (01) according to one of claims 15 to 20, characterized in that a second gear for converting a rotation of the actuating means (36) in a displacement of the piston (17) on the longitudinal axis (XX) arranged on the motor shaft (43 ) coupled first wheel (42) and with the first wheel (42) non-positive second wheel (39) which is coupled to the rotational movement of the piston (17) rotatable on a circular arc around the first wheel (42). Guide roller (01) according to one of the preceding claims, characterized in that two pistons (17) are mounted, each with an associated adjusting means (36) at opposite ends of the guide roller (01). Guide roller (01) according to one of claims 1 to 21, characterized in that the adjusting means (36) selectively with two pistons (17) can be coupled. Guide roller (01) according to claim 1, characterized in that the guide roller (01) is arranged after a paper web which cuts a printed paper web into a plurality of partial webs, a cutting device of a rotary printing press.

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