EP2011756A2 - Method for operating a star wheel, regulating device and operating device - Google Patents

Abstract

The method involves providing a fan wheel (20) to drive in predetermined time in a production cycle at a fan wheel speed and an oscillating speed of a rotary drive speed component. The predetermined time period in the production cycle is a time period when the fan wheel rotates at a rotational speed below the limit of the rotational speed, and during a start-up of the printing press. The fan wheel speed oscillates in a rotational direction, and in an axial direction. The oscillating speed component contains predetermined oscillation frequency and oscillation amplitude. An independent claim is also included for a drive device for a fan wheel for delivering printing products.

Description

The present invention relates to a method for driving a paddle wheel of a web-fed rotary printing press according to the preamble of claim 1, as well as a drive device for the paddle wheel according to the preamble of the claim. 1 0 and a Auslegemodul therefor according to the preamble of claim 15th

In known web-fed rotary printing machines, the printed substrate, usually a paper web, is fed to a folding unit where it is separated into single copies, whereby the individual copies can be collected by means of collecting cylinders, etc., to produce virtually any number of sheets. Subsequently, the printed products are fed with the desired folding a paddle wheel, with the help of which they are designed for a sheet delivery. The paddle wheel has outwardly projecting blades, which are curved in their course from the inside to the outside of the Schaufelraddrehrichtung away, wherein in each case between a leading and a trailing blade, a chamber or bag is formed, in which a product is received. The products are slowed down to the Schaufelradgeschwindigkeit and then stored, for example, with the aid of a Ausstreifbandes on the sheet delivery to form a so-called scale.

It has been found, however, that thick and / or stiff products, as well as electrostatically charged products tend not to slip after leaving the tape line to the paddle wheel into the bottom of the Schaufelradkammer. Because electrostatically charged products stick to the surface of the blades before the desired position is reached and thick and / or stiff products do not conform to the curvature of the blades of the paddle wheel but tend to wedge between one bucket and the next following bucket. In either case, the product does not reach the chamber bottom between the blade and the follower blade and projects beyond the envelope of the paddle wheel, with the result that the subsequent product impacts the leading product and does not slide into the chamber, resulting in stoppers or, if the products reach the sheet delivery, at least to a reduced delivery quality.

A Auslegemodul with such a paddle wheel, a single drive of the paddle wheel, and a corresponding sheet delivery is, for example, the DE 10 2004 029 170 A1 refer to. There already a Auslegemodul is shown, which is adjustable in its horizontal, vertical and also in its angular position relative to the folding unit. The position of the paddle wheel can thus be adjusted so that the products are transferred regardless of the product width, thickness and thickness positionally accurate to the blades of the paddle wheel, which although an improved display quality is achieved, the above-mentioned principal problem is not resolved.

On this basis, it is an object of the present invention to provide a method for driving a paddle wheel of a web-fed rotary printing press, as well as a suitable drive device and a suitable Auslegemodul, with the delivery quality further improved and machine stops can be avoided.

This object is achieved with regard to the method having the features of claim 1, with regard to the drive device having the features of claim 10, and with regard to the extension module having the features of claim 15.

According to the invention, it is provided that the impeller vibrates at least in a predetermined period of time in the production cycle, ie, with a vibrating impeller speed. The drive device according to The invention is accordingly designed to drive the impeller with the oscillating impeller speed, preferably in the predetermined period in the production cycle, in particular during the startup of the printing press. Furthermore, the display module according to the invention is designed so that the paddle wheel is driven with the oscillating paddle wheel speed, preferably in the predetermined period in the production cycle, in particular during startup of the printing press.

In this way it is achieved that the paddle wheel vibrates. Due to the vibrations, no static friction occurs between the blade and the printed product, so that the product does not stick "halfway". Rather, there is a normal promotion behavior in the direction of paddle wheel ground. The printed product is "shaken" to the desired position in the paddle wheel chamber. Overall, the production reliability of the web-fed rotary printing press with the correspondingly driven paddle wheel is thus greatly improved.

The specified period in the production cycle can extend over the entire production period. Advantageously, however, it extends only over phases in which the impeller is operated below a certain critical speed, especially during high, but also when driving down the press. Because it has been found that from a certain speed, which in turn depends on parameters such as the working cycle of the printing press, the structure of the paddle wheel and the nature of the printed product, a sufficient momentum of the print product is present, so that it is also without oscillating drive of the paddle wheel reaches the chamber bottom or penetrates far enough into the chamber to ensure a good delivery quality.

When starting the printing press can thus a speed of the paddle wheel, which increases, for example, according to a predetermined by a control or regulation of the paddle wheel drive Sollwertrampe, a vibrating speed component can be impressed until the critical speed is reached is, from which the momentum of the printed products is sufficient. The setpoint can be used as the critical speed or an actual value measurement can be carried out, wherein a fixed value can be defined as the critical speed, from which the momentum of the printed products is sufficient in each case, or, if a corresponding setting option is provided, product-specific be set to the parameters of the products manufactured in each batch.

It is conceivable, on the one hand, to oscillate the bucket wheel speed or to superimpose a predetermined rotational speed component on the predetermined setpoint speed so that the bucket wheel oscillates or vibrates in the circumferential direction. This is often relatively simple to implement with conventional paddle wheels or Auslegemodulen the structural complexity, since here usually a single drive is provided for the paddle wheel. The single drive can then be controlled with a setpoint speed, which has a vibrating component. Alternatively or additionally, on the other hand, it would also be possible to set the impeller in oscillation in the axial or radial direction.

Particularly in the former case, the drive device can advantageously have a rotary drive which supplies the oscillating rotational speed to the paddle wheel, for example an electric motor and / or a power converter. The normal operating curve of the drive control (speed over time) of the electric motor and / or power converter can then be superimposed on a vibration, e.g. in the form of a vibrating input voltage. This could also be a fine adjustment of the speed oscillation with respect to changing oscillation amplitude or frequency as a function of the instantaneous speed, if necessary.

In the second case, a horizontally or vertically or axially or radially displaceable mounting of the impeller may be provided, as well as a corresponding linear drive, with which the impeller in addition to the rotational movement oscillating in the radial or axial direction is drivable. This is particularly advantageous in such a layout module, which, as in the above-mentioned document DE 10 2004 029 170 A1 , already has a horizontally movable substructure.

Alternatively or additionally, the impeller could also be pivotally mounted on an axis-parallel suspension and an oscillating pivotal movement of the rotational movement of the impeller are superimposed.

Finally, it would also be conceivable to continue to drive the blade wheel in a vibration-free manner and only to set the blades in vibration.

Figur 1

ein erfindungsgemäßes Auslegemodul gemäß einer ersten Ausführungsform der Erfindung zusammen mit einem Falzapparat einer Druckmaschine in Seitenansicht;

Figur 2

eine Vorderansicht des in Fig. 1 gezeigten Auslegemoduls; und

Figur 3

eine Betriebskurve einer Antriebsvorrichtung für ein Schaufelrad eines Auslegemoduls gemäß einer weiteren Ausführungsform der Erfindung.

Advantageous developments are the subject of the other dependent claims and will be explained together with further preferred embodiments of the invention with reference to the accompanying drawings. However, the invention is not limited thereto. Rather, the features of claims and the embodiment described below in any combination, as far as appropriate, can be combined with one another, without departing from the scope of the invention. Show it:

FIG. 1

an inventive Auslegemodul according to a first embodiment of the invention together with a folding apparatus of a printing press in side view;

FIG. 2

a front view of the in Fig. 1 shown Auslegemoduls; and

FIG. 3

an operating curve of a drive device for a paddle wheel of a Auslegemoduls according to another embodiment of the invention.

Fig. 1 shows an inventive Auslegemodul 10 together with a folding apparatus 11 of a web printing press. The folding apparatus 11 has a cutting blade cylinder 12, a folding blade cylinder 13 and a jaw cylinder 14. The cutting blade cylinder 12 and the jaw cylinder 14 rotate in the same direction and in opposite directions to the folding blade 13. Between cutting blade 12, folding blade 13 and jaw cylinder 14, a substrate 15 is moved or guided , The cutting blade cylinder 12 comprises two cutting blades 16. With the aid of the cutting blade 16, 15 copies can be separated from the printing material. The folding blade cylinder 13 comprises three folding blades 17 and three puncturing devices 18. The three folding blades 17 are each positioned at an angle of 120 ° from each other at the periphery of the folding blade cylinder 13. The three puncturing devices 18 are also each positioned at an angle of 120 ° from each other at the periphery of the folding blade cylinder 13, wherein between two folding blades 17 each a puncturing device 18 is arranged. The jaw cylinder 14 preferably has three jaws 19, which are also positioned at an angle of 120 ° from each other at the periphery of the jaw cylinder 14.

To provide a fold on a separated from the substrate 15 by means of the cutting blade 12 copy cutter blade cylinder 12, folding blade 13 and jaw cylinder 14 cooperate such that when separating a copy of the substrate 15 using a cutting blade 16 of the cutting blade 12, the separated copy at the leaf beginning of a puncture device 18 is held and moved with rotation of the folding blade cylinder 13. As a result, the separated copy is moved to a defined folding position relative position between Falzmesserzylinder 13 and jaw cylinder 14, wherein when this relative position is reached, a folding blade 17 of the folding blade 13 the copy in the folding area between open jaws 19 of the jaw cylinder 14 presses, whereas the puncturing device 18 releases the copy. The copy thus held by the jaw cylinder 14 is then further moved by rotation of the jaw cylinder 14 and transferred at a suitable position from the jaw cylinder 14 to the Auslegemodul 10 according to the invention.

The Auslegemodul 10 has according to Fig. 1 via a paddle wheel 20 with a plurality of blades, with adjacent blades of the paddle wheel 20 defining blade pockets. As already mentioned above, specimens or products held in the jaw cylinder 14 are transferred from the jaw cylinder 14 to the delivery module 10, for which purpose conveyor belts 21 are used, which are guided on guide rollers 22. The folded copies or products are therefore released in the area of the conveyor belts 21 from the jaws 19 of the jaw cylinder 14, transferred to the conveyor belts 21 and introduced via the conveyor belts 21 in the vanes of the bucket wheel 20.

In addition to the paddle wheel 20, the extension module 10 further comprises a boom belt 23, wherein the paddle wheel 20 stores the folded copies or products on the boom belt 23. To the boom belt 23, another conveyor belt 24 can connect. As Fig. 1 can be removed, the paddle wheel 20 is associated with a single drive 25, by means of which the paddle wheel 20 and optionally the boom belt 23 is driven. In the exemplary embodiment shown, the delivery module 10 according to the invention accordingly comprises the paddle wheel 20, the individual drive 25 associated with the paddle wheel 20, and the delivery belt 23.

In the example shown, however, the connection of the oscillating paddle wheel speed component does not take place via the individual drive 25, as will be explained in greater detail below. However, if so desired, the cantilever belt 23 may be associated with a separate drive and the single drive of the paddle wheel may be located directly on the paddlewheel shaft.

In the present exemplary embodiment, however, the oscillating velocity component is intended to take place via an arrangement of the paddle wheel 20 which is displaceable and drivable in the horizontal and / or vertical direction relative to the folding apparatus 11, in the example illustrated by way of the double arrow 26 of FIG Fig. 2 in the horizontal direction linearly movable arrangement.

For this purpose, the paddle wheel 20 together with its individual drive 25 via its frame on a frame, not shown, of the Auslegemoduls be linearly displaceable and - be supported driven, as best of Fig. 2 becomes clear, in which case in connection with Fig. 3 to be explained in more detail vibration in the horizontal direction (which simultaneously represents the axial direction of the impeller) via a corresponding linear motor and can be transmitted to the paddle wheel 20 relative to the frame, not shown. To ensure easy shifting and oscillating the paddle wheel 20 but also in a non-illustrated rail system in the horizontal and / vertical direction be slidably mounted or guided, the actual oscillating linear motion preferably via electromotive, but also via pneumatic or hydraulic drive means can be done.

Additionally or alternatively, the Auslegemodul 10 according to the invention in the sense of in Fig. 1 shown double arrows 27 and 28 in a further horizontal direction and in the vertical direction relative to the jaw cylinder 14 to be displaced and oscillated, in which case the paddle wheel 20 together with the single drive 25 and the boom belt 23 and not shown Ausstreifvorrichtungen total in horizontal and / or vertical direction can be displaced and oscillated. As in Fig. 1 and Fig. 2 indicated, the Auslegemodul 10 or paddle wheel 20 according to the invention may further be arranged rotatably about an axis of rotation 29 and pivotable and driven to oscillate.

With such a displaceable and oscillatable cantilever module 10, it is possible to adapt the same optimally to changing products, in particular to changing product widths and changing product thicknesses or product thicknesses, so that the vibration always optimally to the respective product, but also on the current Operating parameters, such as the instantaneous speed of the paddle wheel 20 is tuned. In other words, for example, a higher or lower oscillation amplitude or frequency could be set depending on the torque speed.

The oscillating drive of the impeller 20 and the Auslegemoduls 10 relative to the folding apparatus 11 can be manually switched or fully automated depending on the current time in the production cycle or depending on the instantaneous speed of the impeller in a drive control or - be deposited control. It is also possible to deposit in a control computer for the jib module 10 different oscillation amplitudes or frequencies as a function of predefined product widths and / or product strengths, in order to fully automatically fine-tune the oscillation of the blade wheel as a function of these presets.

In Fig. 3 For an embodiment of the invention in which the vibration of the paddle wheel is effected via an oscillating speed component rotating motor, the operating curve stored in a self-propelled paddle wheel drive control representing the desired speed variation over time in the production cycle is shown.

It can be seen that the target speed of the impeller at startup of the printing presses, starting at a starting time t _{s of} the machine increases along a "target ramp", until the time t _P, the production speed n _{P is} reached. In an area below a time t _D reached critical speed at which a sufficient momentum of the products is believed n _D, is, the here shown roughly dashed set ramp a finely dashed wave component shown modulated or superimposed so to speak, so that results in this speed range shown, rising with a superimposed wave image of the operating curve. Furthermore, it can be seen that the operating curve has a certain forward flow, since the impeller is already subjected to the oscillating setpoint speed component starting at a point in time tv before the starting time of the machine.

On the other hand, when the paddle wheel is subjected to vibration in the horizontal direction or in the axial direction of the paddle wheel instead of the rotational speed vibration, as in FIG Figures 1 and 2 In the example shown, the nominal ramp of the rotational speed in the region below n _D, on the other hand, runs along the coarse-dashed straight line sections, whereas the horizontal drive has the setpoint characteristic indicated in fine dashed lines.

Of course, deviations from the variants shown are possible without departing from the spirit of the invention.

So is in the in Fig. 3 Although the example shown the control of the paddle wheel self-propulsion provided a speed-dependent control. In addition, however, the invention would also be just as conceivable in a position-controlled self-propulsion of the paddle wheel, in which case the position command value then oscillates accordingly. Likewise, a speed or position control would be conceivable.

In the illustrated embodiment, the vibration component is further approximately sinusoidal. In the context of the invention, however, other forms of vibration would also be conceivable, in particular a rectangular or sawtooth form.

In the illustrated embodiment, the impeller or the Auslegemodul is driven with a forced oscillation. but it would also be conceivable to introduce an over the desired period decaying, free-running speed component at the beginning of this period, for example via suitable spring bearings or the like.

Claims (18)

A method for driving a paddle wheel of a web-fed rotary printing press, characterized in that the paddle wheel (20) at least in a predetermined period of time (t _V -t _D ) is driven in the production cycle with a paddle wheel speed, which in addition to a rotational drive speed component comprises a vibrating speed component. A method according to claim 1, characterized in that the predetermined period (t _V -t _D ) in the production cycle, the period (t _V -t _D ) in which the impeller (20) at a speed (n) below a limit speed (n _D ) turns. A method according to claim 1 or 2, characterized in that the predetermined period (t _V -t _D ) is a period of time (t _V -t _D ) during startup of the printing press. Method according to one of the preceding claims, characterized in that the bucket wheel speed oscillates in the direction of rotation. Method according to one of the preceding claims, characterized in that the bucket wheel speed oscillates in the axial direction. Method according to one of the preceding claims, characterized in that the oscillating velocity component has a predetermined oscillation frequency and amplitude. A method according to claim 6, characterized in that the predetermined oscillation frequency and amplitude in the predetermined period (t _V -t _D ) is at least substantially constant. A method according to claim 6 or 7, characterized in that the predetermined oscillation frequency and / or amplitude in the predetermined period at least in a subsequent from the bottom of the speed limit speed range falls with increasing paddle wheel speed. Method according to one of the preceding claims, characterized in that the limit speed (n _D ) is set so that the blade wheel (20) to be taken in a range of speeds above the limit speed sufficient dynamics have to autonomously to the desired position in a respective Bucket chamber of the paddle wheel to get. Drive device for a paddle wheel for laying out printed products, which have been transferred to the paddle wheel from a folding apparatus of a printing press, in particular for carrying out a method according to one of claims 1 to 9, characterized in that the device is arranged such that the paddle wheel (20) at least in a predetermined paddle wheel speed range (0-n _D ) is drivable at a paddle wheel speed having a vibrating speed component in addition to a rotational drive speed component. Drive device according to claim 10, characterized in that the drive device comprises a rotary drive device (25) for self-propelled rotary drive of the paddle wheel (20), with which the paddle wheel is rotatably driven at a speed having a rotating rotational speed component in addition to a rotational drive speed component. Drive device according to claim 11, characterized in that the rotary drive device (25) comprises an electric motor, which is suitable for converting a vibrating input voltage and / or a vibrating input current into a rotational speed with a swinging rotational speed component. Drive device according to claim 11 or 12, characterized in that the rotary drive device (25) comprises a power converter unit which is for converting an oscillating desired input voltage and / or a oscillating desired input current into an actual rotational speed of the impeller (20) is suitable with a swinging rotational speed component. Drive device according to claim 11, 12 or 13, characterized in that the rotary drive device (25) comprises a control unit with which the speed or position of the paddle wheel (20) or the input voltage and / or input current of the electric motor or the power converter is adjustable so that the impeller is rotatably drivable at a speed having in addition to a rotational drive speed component, a swinging rotational speed component. Auslegemodul for a folding apparatus of a printing machine, in particular for carrying out a method according to one of claims 1 to 9, with a paddle wheel (20), wherein the paddle wheel (20) products from a folder for subsequent storage on a boom belt (23) are fed, characterized characterized in that the jib module is arranged such that the bucket wheel (20) is drivable at least in a predetermined bucket wheel speed range (0-n _D ) at a bucket wheel speed having a swinging speed component in addition to a rotational drive speed component. Auslegemodul according to claim 15, characterized in that the impeller has its own drive motor (25), in particular according to one of claims 10 to 14. Jib module according to claim 15 or 16, characterized in that the Auslegemodul comprises a horizontally and / or vertically displaceable mounting of the paddle wheel (20), and a linear drive for acting on the paddle wheel with a vibrating in the axial or radial direction speed. Jib module according to claim 15, 16 or 17, characterized in that the Auslegemodul comprises an axis parallel to the axis of rotation axis pivotable mounting of the impeller and a pivot drive for applying of the paddle wheel with a swinging speed in the swinging direction.

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