DE102007012191A1 - Method for automatic regulation of individual web tensions, involves determining force exerted on folding funnel by track or partial track guided on each folding funnel - Google Patents

Abstract

The method involves determining the force exerted on the folding funnel (02) by the track (07) or partial track guided on each folding funnel. A real web tension is derived on the basis of the determined force. The actual and desired web tension of the folding funnel are compared to regulate the number of revolutions of a roller (04) in such a way that the actual web tension within the area of funnel corresponds to the desired web tension. An independent claim is also included for a device for automatic regulation of individual web tensions in the area of folding funnel printed by a rotary press.

Description

The The invention relates to a method and an apparatus for the individual automatic regulation of the web tension in the area of formers according to the preamble of claim 1 or 13.

The increasing demands on the design and scope of means of rotary printing machines manufacturable printed products is complied with by rotary printing machines be equipped with folding units, which several side by side and / or one above the other arranged arranged formers. Individual printed webs and / or partial webs obtained by longitudinal cutting of printed webs and / or by superimposing several webs and / or Part strands won strands can different Are fed to formers.

by virtue of the resulting large number of possible railway and / or Teilbahn- and / or strand courses within the Folder becomes more and more difficult over the former running webs, partial webs and strands in particular in Set to their web tension.

in the Area of the formers arise special problems. If the web tension in the area of the former is too low, so run the tracks on the formers. Are the web tensions too high, so tear the webs in the area of the former on. Voices the web tension coming from the formers Tracks do not, so it is almost impossible in a cutting cylinder group to comply with a cut register in the folder.

By DE 41 37 818 A1 is a device for adjusting the web tension in a rotary printing machine with a folding unit with a plurality of juxtaposed formers and these downstream, variable speed driven pull rollers known. In the apparatus, each of a former downstream traction rollers and possibly further pull rollers for the former, merging sub-strands driven by a variable-speed drive.

adversely this is because the web tension in the area of the former can not be reliably regulated, as no reliable values for the actual Web tension in the area of the former are detected.

By DE 44 28 593 A1 a device and a method for measuring and controlling the web tension of a web in the region of a former of a folding unit for a rotary printing press is known. The web tension of a path guided by a former is detected by a sensor in the form of a force or tension meter, which is arranged on a control rod with which an included trapped between formers and vertical angle is adjustable. The control rod is connected at its first end to an end portion of the former, at which the web leaves the former chamber, and at its second end connected to a frame on which the former is pivotally mounted about a horizontal axis. The sensor generates a signal corresponding to the voltage which it is subjected to. The signal is passed to a gauge for optically displaying a web tension value and / or to an information processing unit that generates one or more control signals based on the measured web tension values. The one or more control signals may be fed back to a driven hopper inlet roll upstream of the former and / or to a pair of press rolls downstream of the former to activate them to produce a desired web tension.

adversely this is because by merely activating drivable or zusammenpressbarer rollers not the web tension in the folder can be satisfactorily regulated. Furthermore No technical teaching is disclosed, which is an approach to the individual automatic web tension control in the area of the former a folding unit comprising a folding former can be removed.

Of the Invention is based on the object, a method and a device for individual automatic regulation of web tension in the area of formers of printed by means of a rotary printing machine and about former of a multiple former, the rotary printing machine downstream folding unit guided Webs or partial webs or of several over each other printed printed webs and / or partial webs existing To create strands.

The The object is achieved by the features of claim 1 or 13 solved.

A first object of the invention relates to a method for individual automatic control of the web tension in the range of formers of printed by a rotary printing and folding hopper of a multiple former, the rotary printing machine downstream folding material guided webs, z. As webs or partial webs or of several superimposed printed Bah NEN and / or partial webs of existing strands. The folding unit here comprises the individual formers upstream and / or downstream, individually variable speed driven drums or roller pairs. The method provides that each of the former determines the force exerted on the former by at least one web or sub-web guided over the respective former, derives an actual web tension in the area of the respective former from the determined force, and by comparing the actual with a desired web tension in each case at least one of the respective former and / or downstream, speed variable driven roller or a corresponding pair of rollers in its or its speed is controlled so that the actual web tension in the region of the respective former corresponds to the desired web tension.

The Method allows regulation of web tension in Range of individual former of a multiple former Folding mechanism. As a result, the web tension in a plurality Forming hopper comprehensive folding unit can be individually controlled, independent of which web or partial web or strand in the production a particular printed product which former of the folding unit is supplied. As a result, the introductory described Problems caused by too high or too low web tension in the area of the former, solved.

there It is conceivable that for the over the single formers guided tracks, partial tracks or strands different or identical web tension can be specified. As a result, for example, depending on from the number of guided over the individual formers, bundles or partial webs combined to form a strand Web tension, so different, on the respective formers exerted forces are given. Likewise is conceivable, depending on the properties of the printed products to be produced used webs, such as material composition, basis weight, Thickness, tear stress and the like, different web tension pretend.

Preferably the determination of each exerted on a former Force by measuring at least one each to comply with a predetermined or predefinable spatial position and / or Alignment of the respective former required Stützkraftkomponente. This can be done with relatively simple Means a measure of the on each single former applied force can be determined.

• – Vorgabe einer gewünschten Bahnspannung einer über einen Falztrichter eines mehrere Falztrichter umfassenden Falzwerks geführten Bahn oder Teilbahn oder eines Strangs im Bereich des jeweiligen Falztrichters,
• – Messung mindestens einer einer tatsächlichen Bahnspannung der über den jeweiligen Falztrichter geführten Bahn oder Teilbahn oder des Strangs proportionalen Stützkraftkomponente des jeweiligen Falztrichters,
• – Bestimmung der tatsächlichen Bahnspannung im Bereich des jeweiligen Falztrichters anhand der gemessenen Stützkraftkomponente,
• – Vergleich der gewünschten mit der tatsächlichen Bahnspannung und
• – Erhöhung der Drehzahl mindestens einer im Bahnlauf vor dem jeweiligen Falztrichter angeordneten, mit der Bahn in Kontakt stehenden, angetriebenen Walze oder eines entsprechenden Walzenpaares und/oder Absenkung der Drehzahl mindestens einer im Bahnlauf nach dem jeweiligen Falztrichter angeordneten, mit der Bahn in Kontakt stehenden, angetriebenen Walze oder eines entsprechenden Walzenpaares bei einer gegenüber der gewünschten Bahnspannung höheren tatsächlichen Bahnspannung, sowie
• – Absenkung der Drehzahl mindestens einer im Bahnlauf vor dem jeweiligen Falztrichter angeordneten, mit der Bahn in Kontakt stehenden, angetriebenen Walze oder eines entsprechenden Walzenpaares und/oder Erhöhung der Drehzahl mindestens einer im Bahnlauf nach dem jeweiligen Falztrichter angeordneten, mit der Bahn in Kontakt stehenden, angetriebenen Walze oder eines entsprechenden Walzenpaares bei einer gegenüber der gewünschten Bahnspannung niedrigeren tatsächlichen Bahnspannung.

According to a preferred embodiment, the method comprises the method steps:

• Specification of a desired web tension of a web or part web guided by a former of a folding device comprising a plurality of former or a web in the region of the respective former;
• Measuring at least one of an actual web tension of the web or part web guided via the respective former, or the support force component of the respective former, which is proportional to the strand;
• Determination of the actual web tension in the area of the respective former through the measured support force component,
• - Comparison of the desired with the actual web tension and
• Increasing the speed of at least one arranged in the web run before the respective former, in contact with the web, driven roller or a corresponding pair of rollers and / or lowering the speed of at least one arranged in the web to the respective former, in contact with the web, driven roller or a corresponding pair of rollers at a relation to the desired web tension higher actual web tension, and
• Lowering of the rotational speed of at least one web-driven roller positioned in front of the respective former, or a corresponding pair of rollers, and / or increasing the number of revolutions of at least one web-path after the respective former, contacting the web; driven roller or a corresponding pair of rollers at a relation to the desired web tension lower actual web tension.

The Proportionality of the actual web tension and the measured supporting force component can be determined by measurement several different web tensions and measurement of associated Supporting force components as well as interpolation between the Measured values take place. Likewise, it is conceivable the actual Web tension by mathematical calculation of the measured supporting force component derive. Proportionality can be any correspond to mathematical function. Preferably, a supporting force component is measured whose proportionality is linear. The term proportionality closes here both directly, and indirectly proportional Relationships between supporting force component and Web tension with. It can turn a desired Web tension can be specified for all formers, or it can be different desired web tension can be specified for the individual formers.

Preferably, the measured support comprises force component a the respective formers in a predetermined or predetermined angle relative to the vertical supporting force. By deflecting a web, partial web or strand during longitudinal folding over a former, the applied force to support the former in a predetermined or predeterminable angle relative to the vertical changes substantially linearly with the web tension. A linear relationship between measured supporting force component and web tension allows a cost-effective and simple construction of the associated, the speed of the respective former before and / or downstream rollers or a corresponding pair of rollers controlling control device. The control engineering effort is thereby reduced because cost linear members, for example, can be used for positive or negative feedback.

A Supporting force component per formers can be particularly simple be measured by the supporting force component at a the respective former in a predetermined or predeterminable Angle relative to the vertical supporting, preferably essentially horizontally extending and therefore a horizontal Supporting force component transmitting strut, control rod or adjusting spindle is measured. Based on the geometry of the folder and the web guide in the region of the former can through simple trigonometric calculation based on the one support force component by the train or sub-train or the strand on the respective Compensating force exerted by the former and thereby the actual web tension can be determined.

As well It is conceivable that the measured supporting force component a essentially supporting the inlet of the respective former Force includes. Such a measurement is, for example, by arranging suitable sensors in the field of attachment of the Falztrichtereinlaufs For example, on a support frame of the folding unit or the superstructure possible.

So For example, the measurement of the supporting force component by measuring a force exerted by the web on the former Torque done.

Preferably becomes the at least one supporting force component per former by means of at least one of a compressive or tensile force or a torque Proportional output generating strain gauge (DNS) detected. If the former is only in the range of Former hopper on a support frame of the folding unit or superstructure attached, so it is conceivable, at least one DMS, for example in the area of the former inlet or in the area of the former To arrange attachment, so that a change in length the DMS and a proportional change of an output signal a measure of a force exerted on the former Torque is. Even easier is at least one DMS on one a former in a predetermined or predeterminable angle opposite the vertical supporting strut, To arrange adjusting rod or adjusting spindle. Through a change acting along the strut, adjusting rod or adjusting spindle Force is the strut, adjusting rod or adjusting spindle accordingly compressed or stretched, which is why a DMS directly to a suitable Place on the surface of such a strut, adjusting rod or adjusting spindle can be arranged to one of the upset or strain causing force to provide proportional output signal.

One essential advantage here is that for the arrangement of a DMS Such a strut, adjusting rod or adjusting spindle no special Measures must be taken, the respective ones So parts can be executed as before.

at the use of DMS, it is generally irrelevant whether the DMS is stretched, or is compressed as long as it thereby becomes a proportional change the electrical resistance of the DMS comes.

As well It is conceivable that the measurement of the supporting force component by measuring the fluid pressure in an actuator for adjustment the angle enclosed between formers and the vertical angle he follows.

According to one advantageous embodiment of the method is provided that at a decrease in at least one measured supporting force component in the range of at least one former under a certain Threshold a web break detected and issued an alarm signal and / or the rotary printing press is automatically stopped. It is also conceivable that upon reaching certain upper and / or lower thresholds for the speeds of the variable speed drivable rollers or corresponding roller pairs an alarm signal issued and / or the rotary printing machine automatically stopped becomes.

A second object of the invention relates to a device for individual automatic control of the web tension in the range of formers of printed by a rotary printing and folding hopper of a multiple former, downstream of the rotary printing machine folding webs guided paths or partial webs or from multiple superimposed printed webs and / or Partial webs be standing strands. In this case, the folding unit in turn comprises the individual folding hoppers upstream and / or downstream, individually variable speed driven drums or roller pairs. In each case, means are provided at the individual formers, each of which generates an output signal proportional to the actual web tension of a web or part web or a web guided over the respective former and thereby deflected in its direction. The device further comprises at least one associated with these means control means which, depending on the size of the respective web tension in the region of the individual formers proportional output signals, the speeds of at least one respective roller assigned roller or a corresponding roller pair raises and / or lowers to the Actual web tension in the field of individual formers individually to regulate at least one predetermined desired web tension independently.

The Device allows to carry out a method described above and to take advantage of such a process.

According to one advantageous embodiment of the device include the means in particular at least one sensor, each one of a actual web tension one over each a former fed web or sub-web or a strand generate proportional output signal, means for measurement at least one to comply with a given or specifiable spatial Position and / or orientation of the respective former required Supporting force component.

The Device for measuring at least one supporting force component each of a former can at least one of at least comprise strain gauges arranged in a fastening means of the former, which is a pressure acting on the fastener pressure or tensile force or a torque proportional output signal generated. DMS are inexpensive, maintenance free, small and can without modification of the components to which they are arranged will be used. As a result, only small additional costs, because compared to the usual for support the former used parts no custom-made needed become.

Preferably is at least one Dehn-measuring strip in the range of the respective former in a predetermined or predeterminable angle the vertical supporting strut, control rod or adjusting spindle arranged. Since over a the former in a given or predeterminable angle relative to the vertical supporting Strut, adjusting rod or adjusting spindle exclusively Tensile or compressive forces along the strut, control rod or Adjusting spindle can be transmitted by means of an arranged such a strut, adjusting rod or adjusting spindle DMS in a particularly simple way a supporting force component be measured in amount and direction.

The Strut, adjusting rod or adjusting spindle supports the former preferably in the area of the former, since such a high Stiffness of the former can be ensured. To one However, it is also conceivable to obtain a stronger output signal. that the strut, adjusting rod or adjusting spindle the former at any point between the folder nose and the folder inlet supported. Likewise, the strut, control rod or adjusting spindle basically in every arbitrary angle vertical, without affecting the measuring principle.

is provided, at least one DMS on an adjusting spindle of a To arrange the former, the DMS is preferably at the non-rotatable Part of the adjusting spindle arranged. This can be an electrical Connection between DMS and control device particularly simple getting produced.

Instead of or in addition to an arrangement of a DMS on a strut, Adjusting rod or adjusting spindle can each have at least one DMS also arranged in the region of the inlet of a respective former be.

in principle It is also conceivable that the device for measuring the supporting force component a device for measuring the fluid pressure in an actuator for Adjustment of trapped between formers and vertical Includes angle. This has the advantage that based on the fluid pressure in such an actuator directly on a supporting force component can be deduced.

An advantageous embodiment of the device provides that the control device comprises means for specifying a desired web tension of a web fed via a former of a multiple former other web or part web or a strand in the region of the former, as well as means for determining the actual web tension in the Forming hopper based on the measured supporting force component. In addition, the control device preferably comprises means for comparing the desired with the actual web tension and means for increasing the speed of at least one arranged in the web run before the former, in contact with the web, driven roller or a corresponding pair of rollers and / or lowering the speed at least one in the web arranged on the former, in contact with the web, driven roller or a corresponding pair of rollers at a relation to the desired web tension higher actual web tension, and means for lowering the speed of at least one arranged in the web before the former, in contact with the web, driven Roller or a corresponding pair of rollers and / or increasing the speed of at least one arranged in the web behind the former, in contact with the web, driven roller or a corresponding pair of rollers at a relation to the desired web tension lower actual web tension.

The Control device may also have means for output an alarm signal and / or to stop the rotary printing machine at a decrease in the measured supporting force component below a certain threshold. This allows in addition to an automatic regulation of the web tension in the area the former of a multiple former folding folder additionally web breaks in the area of the former are detected.

As well the control means may comprise means for outputting an alarm signal and / or stopping the rotary printing press upon reaching certain upper and / or lower thresholds for the speed at least one variable-speed drivable roller or a include corresponding roller pair. This allows Control error of the control device and performance limits of the rollers or pairs of rollers driving drive devices are detected.

embodiments The invention are illustrated in the drawings and will be described in more detail below described.

It demonstrate:

1 a schematic representation of the web guide in a folder with four formers in balloon arrangement and with individually variable speed driven, the formers downstream roller pairs and with a device for individual control of the web tension in the form of the former;

2 a schematic representation of the web guide in a folding unit with two formers and individually variable speed driven, the formers downstream roller pairs and with a device for individual control of the web tension in the form of the former;

3 a schematic representation of a former of a folding device equipped with a device with individually variable speed driven, the former and downstream rollers or pairs of rollers.

An in 1 illustrated folding unit 01 includes four formers 02 in so-called balloon arrangement, in which two superposed Falztrichterebenen I ; II two formers each 02 are arranged side by side. Each former 02 is subordinate one by one motor 03 drivable roller pair 04 , The folder 01 also has other engines as well 05 driven roller pairs 06 , The speeds of each engine 03 can be changed individually by a control device, not shown, so that the roller pairs 04 through the engines 03 individually variable in speed are drivable. About the formers 02 of the folding unit 01 be by means not shown, the folding unit 01 upstream rotary printing machine printed material webs 07 , z. B. tracks 07 or partial webs or of several superimposed printed webs 07 and / or partial webs existing strands out to fold them longitudinally.

to Simplification is referred to below only by railways, where the term railway both single lanes, as well as partial lanes as well strands composed of a plurality of webs and / or partial webs includes.

When longitudinally folding over the former 02 guided tracks 07 they are redirected in their direction. In this way, the webs under actual web tension practice 07 Forces on the former 02 out. At the individual formers 02 each not shown means are provided, each one of an actual web tension one via each of a former 02 guided train 07 generate proportional output signal. The means are in the form of means for measuring at least one for maintaining a predetermined or predeterminable spatial position and / or orientation of the respective former 02 required supporting force component executed. The control device, which controls the speeds of the motors 03 individually regulated, is connected with these means. Depending on the size of the respective actual web tension in the area of the single former 02 proportional output signals, the controller raises the speeds of the each former 02 associated roller pairs 04 individually or lowers these to the actual web tension in the area of each former 02 individually to regulate at least one predetermined desired web tension independently.

The engines 05 driven roller pairs 06 essentially serve the further transport of over the former 02 the upper Falztrichterebene I guided tracks 07 , Their speeds can also be adjusted by the controller. The roller pairs 04 are as the formers 02 Subordinate press roller pairs of the folding unit 01 executed.

The folder 01 is by the one measurement of the actual web tension in the area of the former 02 enabling means and associated with these means control device, which controls the rotational speeds of the variable speed driven roller pairs 04 individually regulates the actual web tension in the area of the former 02 independently to specified desired web tension in the area of the former 02 to regulate.

As a result, a method for individual automatic control of web tension in the range of formers 02 of printed by means of a rotary printing machine and over formers 02 a multiple former 02 comprehensive, the rotary printing machine downstream folding 01 guided tracks 07 be executed. The folder 01 includes here the individual formers 02 upstream and / or downstream, individually variable speed driven drums or roller pairs 04 ; 06 , The method provides that per former 02 that of at least one or one over the respective former 02 guided train 07 or partial web on the former 02 applied force determined, based on the determined force an actual web tension in the region of the respective Former 02 derived, and by comparing the actual with a desired web tension in each case at least one of the respective former 02 upstream and / or downstream variable speed driven roller or a corresponding pair of rollers 04 ; 06 is regulated in its or its speed so that the actual web tension in the region of the respective former 02 the desired web tension corresponds.

An in 2 illustrated folding unit 08 comprises two in a common former chamber plane juxtaposed former 09 , Each former 09 is an individually variable speed driven roller 10 , in particular draw roller 10 upstream, as well as one by its own Zugwalzenantrieb 11 individually variable speed driven roller pair 12 , in particular Zugwalzenpaar 12 downstream. The folder 08 also has a continuously variable differential gearbox 13 over which a main draw roller 14 Variable speed is driven. A main drive serves to drive the main tension roller 14 , a cutting cylinder 15 , a collection cylinder 16 , a jaw cylinder 17 and a paddle wheel 18 , which by means of the folding unit 08 from the printed by a non-illustrated rotary printing machine webs 21 , z. B. tracks 21 produced printed products in the form of a scale flow on one by its own drive 19 driven delivery belt 20 stores.

Both the speeds of the individually variable speed drivable pull rollers 10 , as well as the speeds of individually variable speed driven drift roller pairs 12 are controlled by a control device, not shown. This control device is connected to means which each one of an actual web tension one each via a former 09 guided train 21 generate proportional output signal. The means are as means for measuring a compliance with a predetermined angle of the respective former 09 carried out relative to the vertical support force component.

The control device has means for presetting desired web tension of the over the formers 09 of the folding unit 08 guided tracks 21 in the area of the former 09 , In addition, the control device has at least one sensor for determining the actual web tension in the area of the former 09 based on the measured supporting force components or on the basis of the two supporting force components of the two formers 09 corresponding output signals. In addition, the control device comprises means for comparing the desired with the actual web tension. The control device also has means for individually increasing the speed of the web before the respective former 09 arranged, with the respective track 21 in contact, variable speed driven pull roller 10 and / or lowering the speed of the web in the web after the respective former 09 arranged, with the respective track 21 in contact, variable speed driven roller pairs 12 at a relation to the desired web tension higher actual web tension, as well as means for individual reduction of the speed in the web run before the former 09 arranged, with the respective track 21 in contact, variable speed driven pull roller 10 and / or increasing the speed of the web in the web after the respective former 09 arranged, with the respective track 21 in contact, variable speed driven roller pair 12 at a relation to the desired web tension lower actual web tension.

• – Vorgabe einer gewünschten Bahnspannung einer über einen Falztrichter 09 eines mehrere Falztrichter 09 umfassenden Falzwerks 08 geführten Bahn 21 oder Teilbahn oder eines Strangs im Bereich des jeweiligen Falztrichters 09,
• – Messung mindestens einer einer tatsächlichen Bahnspannung der über den jeweiligen Falztrichter 09 geführten Bahn 21 oder Teilbahn oder des Strangs proportionalen Stützkraftkomponente des jeweiligen Falztrichters 09,
• – Bestimmung der tatsächlichen Bahnspannung im Bereich des jeweiligen Falztrichters 09 anhand der gemessenen Stützkraftkomponente,
• – Vergleich der gewünschten mit der tatsächlichen Bahnspannung und
• – Erhöhung der Drehzahl mindestens einer im Bahnlauf vor dem jeweiligen Falztrichter 09 angeordneten, mit der Bahn 21 in Kontakt stehenden, angetriebenen Walze 10 oder eines entsprechenden Walzenpaares und/oder Absenkung der Drehzahl mindestens einer im Bahnlauf nach dem jeweiligen Falztrichter 09 angeordneten, mit der Bahn 21 in Kontakt stehenden, angetriebenen Walze oder eines entsprechenden Walzenpaares 12 bei einer gegenüber der gewünschten Bahnspannung höheren tatsächlichen Bahnspannung, sowie
• – Absenkung der Drehzahl mindestens einer im Bahnlauf vor dem jeweiligen Falztrichter 09 angeordneten, mit der Bahn 21 in Kontakt stehenden, angetriebenen Walze 10 oder eines entsprechenden Walzenpaares und/oder Erhöhung der Drehzahl mindestens einer im Bahnlauf nach dem jeweiligen Falztrichter 09 angeordneten, mit der Bahn 21 in Kontakt stehenden, angetriebenen Walze oder eines entsprechenden Walzenpaares 12 bei einer gegenüber der gewünschten Bahnspannung niedrigeren tatsächlichen Bahnspannung.

As a result, a method for individual automatic control of web tension in the range of formers 09 by means of a rotary printing machine printed and folded over ter 09 a multiple former 09 comprehensive, the rotary printing machine downstream folding 08 with the individual formers 09 upstream and / or downstream, individually variable speed driven drums or roller pairs 12 guided tracks 21 be carried out, which comprises the following method steps:

• - Specification of a desired web tension one via a former 09 a multiple former 09 comprehensive folding unit 08 guided train 21 or partial web or a strand in the region of the respective former 09 .
• - Measuring at least one of an actual web tension over the respective former 09 guided train 21 or partial web or the strand proportional support force component of the respective Former 09 .
• - Determination of the actual web tension in the area of the respective former 09 based on the measured supporting force component,
• - Comparison of the desired with the actual web tension and
• - Increasing the speed of at least one in the web before the respective former 09 arranged by train 21 in contact, driven roller 10 or a corresponding pair of rollers and / or lowering the speed of at least one in the web run after the respective former 09 arranged by train 21 in contact, driven roller or a corresponding pair of rollers 12 at a relation to the desired web tension higher actual web tension, as well
• - Reduction of the speed of at least one in the web before the respective former 09 arranged by train 21 in contact, driven roller 10 or a corresponding pair of rollers and / or increasing the speed of at least one in the web run after the respective former 09 arranged by train 21 in contact, driven roller or a corresponding pair of rollers 12 at a lower than the desired web tension actual web tension.

In 3 is a former 22 one in the 1 and 2 Folder described 01 ; 08 shown in a side view. The former 22 be several printed by a rotary printing machine webs 23 , z. B. tracks 23 fed. A unifying roller 24 leads the tracks 23 to a strand together. A powered, rotating cutting knife 25 divides the strand by slitting into two sub-strands, with in 3 only one of several in a common former chamber level juxtaposed folders 22 is shown. The former 22 is a variable speed driven roller 26 , in particular draw roller 26 upstream. The former 22 is also a variable speed driven, below the folding rollers 32 arranged downstream, not shown Zugwalzenpaar downstream. pull rings 33 press the partial strand against the draw roller 26 To control the slip between pull roller 26 and sub-strand, and to reduce the slip between the individual sub-paths of the sub-strand. The former 22 is in the area of the folder inlet 27 about a horizontally extending pivot axis 34 pivotable on a support frame 28 arranged. Between folder inlet 27 and folder nose 29 supports a fastener 30 , in particular an adjusting spindle 30 the former 22 at a predeterminable, variable angle relative to the vertical. At the non-rotatable part of the adjusting spindle 30 is a device for measuring a supporting force component in the form of at least one sensor 31 , in particular a strain gauge (DMS) 31 arranged. The DMS 31 it forms the means which one of the actual web tension of the over the former 22 Guided sub-string produce proportional output signal.

The DMS 31 generates an output signal, which one via the adjusting spindle 30 transmitted supporting force component is proportional. One with the DMS 31 connected, not shown control device uses this output signal as a measure of the actual web tension of the over the former 22 Guided sub-strand of several superimposed partial webs in the region of the former 22 , The controller compares one for the former 22 predefinable, desired web tension with the actual web tension in the region of the former 22 and regulates the speeds of the tension roller 26 and that after the folding rollers 32 arranged Zugwalzenpaares so that the actual web tension in the region of the Former 22 with the desired web tension in the area of the former 22 matches.

By an arrangement of the DMS 31 on the non-rotatable part of the adjusting spindle 30 can be an electrical connection between DMS 31 and the controller, which controls the rotational speed of the former 22 Immediately upstream, individually variable speed driven drift roller 26 , as well as the speed of the former 22 and the folding rollers 32 immediately downstream, individual variable speed driven drivable roller pair in dependence on the output signal of the DMS 31 regulates, be made very easy.

In order to increase the operational reliability can be per folder 22 and each adjusting spindle 30 several strain gages 31 be provided. Likewise, it may be advantageous for the same reason, per former 22 to measure several supporting force components.

It is important to emphasize that the use of DMS 31 no modification of the components used in the prior art for attaching and supporting the former 22 requires. DMS 31 provide reliable and meaningful signals about the elastic length changes of components when attached to their surface. By knowing the material properties of the components to which DMS 31 are directly attached, such as modulus of elasticity, knowledge of the geometric properties, in particular cross-sectional area, as well as trigonometric boundary conditions, can by reference to a change in length of the DMS 31 proportional output signal of the strain gauge 31 to the transmitted via the respective component supporting force component, thereby to the standing under an actual web tension web 23 on a former 22 applied force, and this in turn be deduced on the actual web tension.

It is equally important to emphasize that, in principle, other, for example non-contact measurement methods, such as, for example, stress-optical methods, are also conceivable for determining a supporting force component of a former that is transferred from a strut, adjusting rod or adjusting spindle. However, such processes are more expensive and thus more expensive than DMS 31 ,

Of Another important thing to emphasize is that it is basically is also within the scope of the invention, not only the speeds of the formers of a folding unit comprising a folding former or downstream, individually variable speed drivable rollers or roller pairs to regulate, but in addition or instead this is also possible, the contact pressure of both sides a run over a former, the web, Part web or a strand arranged rolls comprehensive roll pair by means of suitable actuators depending on the To regulate the force applied to the former, to the actual Web tension in the area of the former to a desired web tension to regulate.

01

folding

02

formers

03

engine

04

roller pair

05

engine

06

roller pair

07

Web, train

08

folding

09

formers

10

Roller, pulling roller

11

Zugwalzenantrieb

12

Roller pair pair of drawing rollers

13

differential gear

14

Hauptzugwalze

15

cutting cylinder

16

collecting cylinder

17

jaw cylinder

18

paddle wheel

19

drive

20

delivery belt

21

Web, train

22

formers

23

Web, train

24

association roller

25

cutting blade

26

Roller, pulling roller

27

Falztrichtereinlauf

28

supporting frame

29

Falztrichternase

30

Fastening means, adjusting spindle

31

Sensor, Stretch measuring strip (DMS)

32

folding roller

33

pull ring

34

swivel axis

I

Falztrichterebenen

II

Falztrichterebenen

QUOTES INCLUDE IN THE DESCRIPTION

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Cited patent literature

• - DE 4137818 A1 [0005]
• - DE 4428593 A1 [0007]

Claims (22)

Method for individual automatic regulation of web tension in the area of formers ( 02 ; 09 ; 22 ) of printed by means of a rotary printing press and over formers ( 02 ; 09 ; 22 ) of a multiple former ( 02 ; 09 ; 22 ) comprehensive, the rotary printing machine downstream folding ( 01 ; 08 ) guided tracks ( 07 ; 21 ; 23 ) or partial webs or of several superimposed printed webs ( 07 ; 21 ; 23 ) and / or partial webs of existing strands, which folding unit ( 01 ; 08 ) the individual formers ( 02 ; 09 ; 22 ) upstream and / or downstream, individually variable speed driven drums ( 10 ; 26 ) or roller pairs ( 04 ; 06 ; 12 ), characterized in that per former ( 02 ; 09 ; 22 ) of at least one over the respective former ( 02 ; 09 ; 22 ) guided train ( 07 ; 21 ; 23 ) or partial web on the former ( 02 ; 09 ; 22 ) applied force, derived based on the force determined an actual web tension, and by comparing the actual with a desired web tension in each case at least one of the respective former ( 02 ; 09 ; 22 ) upstream and / or downstream variable speed driven roller ( 10 ; 26 ) or a corresponding pair of rollers ( 04 ; 06 ; 12 ) is controlled in its or its rotational speed so that the actual web tension in the region of the respective former ( 02 ; 09 ; 22 ) corresponds to the desired web tension. A method according to claim 1, characterized in that for the over the single former ( 02 ; 09 ; 22 ) guided tracks ( 07 ; 21 ; 23 ) or partial webs or strands different or identical desired web tension can be specified. A method according to claim 1 or 2, characterized in that the determination of each on a former ( 02 ; 09 ; 22 ) force exerted by measuring in each case at least one support force component. A method according to claim 3, characterized by the method steps: - Specification of a desired web tension one via a former ( 02 ; 09 ; 22 ) guided train ( 07 ; 21 ; 23 ) or partial web or a strand in the region of the respective former ( 02 ; 09 ; 22 ), - measurement of at least one of an actual web tension over the respective former ( 02 ; 09 ; 22 ) guided train ( 07 ; 21 ; 23 ) or partial web or the strand proportional supporting force component of the respective former ( 02 ; 09 ; 22 ), - determination of the actual web tension in the area of the respective former ( 02 ; 09 ; 22 ) based on the measured supporting force component, - comparing the desired with the actual web tension and - increasing the speed of at least one in the web before the respective former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller ( 10 ; 26 ) or a corresponding pair of rollers and / or lowering the speed of at least one in the web run after the respective former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller or a corresponding pair of rollers ( 04 ; 06 ; 12 ) at a higher than the desired web tension actual web tension, and - lowering the speed of at least one in the web run before the respective former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller ( 10 ; 26 ) or a corresponding pair of rollers and / or increasing the speed of at least one in the web run after the respective former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller or a corresponding pair of rollers ( 04 ; 06 ; 12 ) at a lower than the desired web tension actual web tension. A method according to claim 3 or 4, characterized in that the measured supporting force component a the respective former ( 02 ; 09 ; 22 ) comprises at a predetermined or predetermined angle relative to the vertical supporting force. A method according to claim 5, characterized in that the supporting force component at a respective former ( 02 ; 09 ; 22 ) in a predetermined or predetermined angle relative to the vertical supporting strut, adjusting rod or adjusting spindle ( 30 ) is measured. A method according to claim 3, 4 or 5, characterized in that the measured supporting force component is a substantially the Falztrichtereinlauf ( 27 ) of the respective former ( 02 ; 09 ; 22 ) supporting force comprises. A method according to claim 3, 4 or 5, characterized in that the measurement of the supporting force component by measuring one through the web ( 07 ; 21 ; 23 ) on the former ( 02 ; 09 ; 22 ) applied torque takes place. Method according to one of claims 3 to 8, characterized in that the supporting force component by means of at least one of a pressure or tensile force or torque proportional output signal generating strain gauge strip ( 31 ) is detected. Method according to one of claims 3 to 8, characterized in that the measurement of the supporting force component by measuring the fluid pressure in an actuator for adjusting the between the former ( 02 ; 09 ; 22 ) and the vertical angle included. Method according to one of claims 3 to 10, characterized in that at a decrease in the measured supporting force component below a certain threshold, a web break is detected and entered Alarm signal output and / or the rotary printing press automatically is stopped. Method according to one of the preceding claims, characterized in that when certain upper and / or lower threshold values for the rotational speed of at least one variable-speed driven roller ( 10 ; 26 ) or a corresponding roller pair ( 04 ; 06 ; 12 ) an alarm signal and / or the rotary printing machine is automatically stopped. Device for individual automatic regulation of the web tension in the area of formers ( 02 ; 09 ; 22 ) of printed by means of a rotary printing press and over formers ( 02 ; 09 ; 22 ) of a multiple former ( 02 ; 09 ; 22 ) comprehensive, the rotary printing machine downstream folding ( 01 ; 08 ) guided tracks ( 07 ; 21 ; 23 ) or partial webs or of several superimposed printed webs ( 07 ; 21 ; 23 ) and / or partial webs of existing strands, which folding unit ( 01 ; 08 ) the individual formers ( 02 ; 09 ; 22 ) upstream and / or downstream, individually variable speed driven drums ( 10 ; 26 ) or roller pairs ( 04 ; 06 ; 12 ), characterized in that at the individual formers ( 02 ; 09 ; 22 ) each of the at least one sensor ( 31 ), which in each case one of an actual web tension one over the respective former ( 02 ; 09 ; 22 ) guided train ( 07 ; 21 ; 23 ) or partial track or a string produce proportional output signal, and the device at least one with this sensor ( 31 ) connected control device which, depending on the size of the respective output signals, the speeds at least one each per former ( 02 ; 09 ; 22 ) associated roller ( 10 ; 26 ) or a corresponding roller pair ( 04 ; 06 ; 12 ) raises and / or lowers the actual web tension in the area of the individual former ( 02 ; 09 ; 22 ) independently to regulate at least one predetermined desired web tension independently. Apparatus according to claim 13, characterized in that the at least one sensor ( 31 ), which in each case one of an actual web tension one via each one of a former ( 02 ; 09 ; 22 ) guided train ( 07 ; 21 ; 23 ) or partial track or a train generate proportional output signal, a sensor ( 31 ) for measuring at least one supporting force component of the respective former ( 02 ; 09 ; 22 ). Apparatus according to claim 14, characterized in that the at least one sensor ( 31 ) for measuring at least one supporting force component of a respective folding funnel ( 02 . 09 . 22 ) at least one at least one fastening means ( 30 ) of the former, strain gauges ( 31 ), which one on the fastening means ( 30 ) acting pressure or tensile force or a torque proportional output signal generated. Device according to claim 15, characterized in that at least one strain gauge strip ( 31 ) in the region of a respective former ( 02 ; 09 ; 22 ) in a predetermined or predetermined angle relative to the vertical supporting strut, adjusting rod or adjusting spindle ( 30 ) is arranged. Apparatus according to claim 16, characterized in that the strain gauge strip ( 31 ) on the non-rotatable part of the adjusting spindle ( 30 ) is arranged. Device according to claim 15, characterized in that at least one strain gauge strip ( 31 ) in the area of the former inlet ( 27 ) of the respective former ( 02 ; 09 ; 22 ) is arranged. Apparatus according to claim 14, characterized in that the at least one sensor ( 31 ) for measuring the supporting force component, a device for measuring the fluid pressure in an actuator for adjusting the between the former ( 02 ; 09 ; 22 ) and vertical included angle. Device according to one of claims 14 to 19, characterized in that the control device comprises means for presetting a desired web tension one via a former ( 02 ; 09 ; 22 ) guided train ( 07 ; 21 ; 23 ) or partial web or a strand in the region of the former ( 02 ; 09 ; 22 ), at least one sensor ( 31 ) for determining the actual web tension in the area of the former ( 02 ; 09 ; 22 ) based on the measured supporting force component, means for comparing the desired with the actual web tension and means for increasing the speed of at least one in the web run before the former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller ( 10 ; 26 ) or a corresponding pair of rollers and / or lowering the speed of at least one in the web run after the former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller or a corresponding pair of rollers ( 04 ; 06 ; 12 ) at a compared to the desired web tension higher actual web tension, as well as means for lowering the speed of at least one in the web run before the former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller ( 10 ; 26 ) or a corresponding pair of rollers and / or increasing the speed of at least one in the web run after the former ( 02 ; 09 ; 22 ), by train ( 07 ; 21 ; 23 ) in contact, driven roller or a corresponding pair of rollers ( 04 ; 06 ; 12 ) at a lower actual web tension than the desired web tension. Device according to one of claims 13 to 20, characterized in that the control means for outputting an alarm signal and / or for stopping the rotary printing machine at a decrease in the measured supporting force component below a certain threshold. Device according to one of claims 13 to 21, characterized in that the control device means for outputting an alarm signal and / or stopping the rotary printing press upon reaching certain upper and / or lower thresholds for the speed of at least one variable-speed driven roller ( 10 ; 26 ) or a corresponding roller pair ( 04 ; 06 ; 12 ).