EP0329814A1 - Web longitudinal folding device - Google Patents

Abstract

In the device for the longitudinal folding of a web (D) is arranged a plough-type folding head (1) whose working width can be infinitely varied and which is provided with a suspension system which can be displaced transversely with respect to the web running direction. The folding line and the working width of said folding head, and thus the distance between two folds during wallet folding, can be controlled by means of two actuators (5.1, 5.2) driven by servo elements (6.1, 6.2), position transmitters (31.1., 31.2) supplying signals relating to the values of the position coordinates. The control for adjusting the folding head transversely to the web running direction is supplemented by a control for adjusting the unwinding angle essential for plough folding by the distances between lying roller (8), leaching roller (3) and folding head being adjustable. The data on the adjusted positions can, on the one hand, be monitored in the process and can be stored for pre-adjustment purposes on the other hand. For the purpose of forming improved folding edges, a closing device (30) which can be incorporated in the adjustment is arranged upstream of the outlet roller. The adjustment control possibilities, in particular in relation to the folding head which can be narrowed or widened without gaps, can also be used for guiding the folding register. All the actuators can be employed in the overshot and undershot working position of the plough folder. <IMAGE>

Description

The invention relates to a device for longitudinally folding a web, which is preferably used in the processing of printing webs in connection with a folding apparatus set up after the printing units of a web-fed rotary printing press. The web running diagram, the product design based on the folding devices of the folding apparatus and the present device for longitudinal folding are shown in DE 36 15 121 A1.

A device for longitudinal folding of the generic type is shown in US 44 21 501. The plow fold head with plow shoes arranged on both sides allows the production of a longitudinal fold when a plow shoe is loaded and the so-called altar fold when both plow shoes are loaded. The support body can be specified in different widths for different web widths or in the case of the attachment of an altar fold with different required spacing of the parallel folds lying parallel to the altar fold, in that different support body segments are assembled, which in total result in the required dimensioning for the support body. The path guiding surface of the support body, which can also be designed to be stationary, as in the case of the plow shoes, is provided by the casing pieces of rotating rollers. There are grooves between the lined up cylindrical rollers, into which the web can fall when the web tension is high. The grooves cause marks in the print. In the web guiding devices that design the path of the web to form the plow, the position of the inlet and outlet rollers is unchangeable, the plow fold head can be adjusted perpendicular to the plane formed by the inlet and outlet rollers and continues transversely to the direction of web travel in the required direction Foldable position.

The adjustment and displacement of the plow fold head into the correct working position, as well as the provision of the plow fold head with the appropriate working width, must be carried out by hand.

It is therefore the task of designing the device for longitudinally folding a web for a more versatile production use, the manual operation being to be reduced without there being any disadvantages for the web guide quality.

This includes that the parts which cause and influence the fold formation are designed to be adjustable, in particular remotely adjustable.

As a solution to this problem, the features specified in claim 1 exist.

Afterwards, all settings essential for the folding function for different orders can be controlled externally. With different web widths or fold spacing in the case of altar folding, the plow fold head is moved to the required working width. Manual interventions and assembly work in a certain range of changes in the design of the support body from production to production are eliminated. Manual adjustments to the running machine, with a web that is sensitive to tearing, are no longer necessary for readjustments in view of the high quality requirements in print production. The control systems used offer feedback options. The signals from the position sensors are used for operational monitoring and, if they are saved, for recycling in the case of repeat orders.

• Fig. 1: Anordnung einer Pflugfalzeinrichtung mit zugehörigen Bahnleitelementen;
• Fig. 2: Vorderansicht mit teilweisem Schnitt einer im Maschinengestell aufgehängten Pflugfalz­einrichtung mit Steuereinrichtungen;
• Fig. 3: Seitenansicht eines an einem Tragaufbau gehalterten Pflugfalzkopfes mit Steuerein­richtungen, schematisch;
• Fig. 4a: Bahnabwicklung bei unterschlächtig positio­niertem Pflugfalzkopf;
• Fig. 4b: dto. bei oberschlächtiger Arbeitsweise;
• Fig. 5a, 5b, 5c: Verschieden breite Pflugfalzköpfe gemäß Bahnbreite und Falzabstand;
• Fig. 6a: Auslaufbereich der gefalzten Bahn mit Schließ­walze;
• Fig. 6b: dto. mit Schließleiste.

The invention is described below with reference to an embodiment shown in the figures. It shows:

• Fig. 1: Arrangement of a plow folder with associated web guide elements;
• 2 shows a front view with a partial section of a plow folding device with control devices suspended in the machine frame;
• Fig. 3: Side view of a plow hinge head held on a support structure with control devices, schematically;
• 4a: web processing with plow fold head positioned underneath;
• Fig. 4b: dto. In the overshot mode of operation;
• 5a, 5b, 5c: Plow fold heads of different widths according to the web width and fold spacing;
• 6a: outlet area of the folded web with closing roller;
• Fig. 6b: dto. With locking bar.

The x, y, z directions stand for the web running direction (folding direction, unwinding direction), axial direction (transverse to the web running direction), deflection direction (perpendicular to the web running direction plane, perpendicular to the plane formed by the infeed and outfeed roller).

Backward to the device for longitudinally folding a printing material web D shown in FIG. 1 are the printing units (not shown), the dryer, the cooling rollers, and possibly the perforating and gluing unit. Seen in the forward direction, the web D runs, if necessary, in further longitudinal folding devices, then through the usual stations integrated in the folder or through stations set up outside the folder for cross cutting, trimming and cutting out, so that the highest possible degree of in-line production is achieved.

The infeed and outfeed rollers 2, 3, which are designed as deflection rollers, guide the web D to or away from the plow hemming head 1. Upstream and downstream of the web, there is a pulling group 12 each, consisting of a pulling roller and several pressure rollers. The train groups 12 are connected to one another via control gears connected to the longitudinal shafts, so that the speed ratios suitable for the respective production conditions can be set separately.

The inlet and outlet rollers 2, 3 are installed in a roller displacement 4. The suspension of the inlet and outlet roller 2, 3 each comprises a block 13 on which a pivot lever 14 is rotatably mounted. The end of the pivot lever 14 is connected to the roller axis. A locking pin 15 allows the pivot lever 14 to be fixed in different angular positions on the block 13. Depending on the direction of rotation of a spindle drive 5.3, 5.4, the block 13 and the respective roller 2, 3 attached to it can be moved back and forth. This linear positioning path is superimposed on the circular positioning path, due to the circular path at the end of the pivot lever 14. The travel path is generated via a servo link 6.3, 6.4, the position is tapped via a position transmitter 31.3, 31.4. Limit switches 33 limit the respective adjustment range on both sides.

The position of the plow fold head 1 and the position of the block 13 within the adjustment range, seen for the inlet and outlet rollers 2, 3, determine the production-specific fold geometry. This varies depending on the wrapping width, ie the distance from the web edge to the longitudinal fold or from the previous longitudinal fold to the new longitudinal fold to be formed, and depending on the printing material quality.

The train groups 12 are fixed because of the drives. Since fixed web rollers restrict the development paths, the processing to be used for plow folding can only be designed by changing the position of the inlet, outlet roller 2, 3 and plow head 1. Other web guide rollers therefore play no role in the relevant processing. For the fold geometry according to the development triangle formed by the inlet roller 2, plow fold head 1 and outlet roller 3, two curvatures of the same direction, cf. on the inlet and outlet rollers 2, 3, and an opposite curvature, cf. on plow fold head 1.

4a, the block 13 and the pivoting lever 14 are set differently for the inlet and outlet rollers 2, 3 than for the structure with the overshot mode of operation of the plow fold head 1 according to FIG. 4b.

To adjust the plow rebate head 1 in the z direction, a cross member 10 extending transversely between the frame walls 34 is arranged to be movable up and down by means of an actuator 5.5.

The movement is initiated by a servo link 6.5, transmitted by means of shaft 16.1 running through the crossmember 10 via worm gears on lifting sleeves 17, which climb up and down on fixed spindles 18. The tapping of the height adjustment of the plow rebate head 1 responsible for the deflection of the path D takes place via a rack 32 which is fixed to the frame and parallel to the height displacement of the cross member 10 and along which a position sensor 31.5 is guided. The position transmitter 31.5 is fastened to the lifting sleeve 17. The height adjustment range is limited at the top and bottom by limit switches 33.

The entire structure connected to the traverse 10 is raised or lowered. A pivoting of the plow fold head 1 is possible via a laterally arranged swivel drive 20 rotating the cross member 10, formed by a worm gear. The swivel drive 20 serves to swivel the plow fold head 1 from the undershot to the oversleep position and vice versa by at least 180 ° in the swivel direction A, indirectly also to adjust the inclination of the blade 35 of the plow shoe 8.

The arm 11 holding the plow fold head 1 projects away from a block 19 which on the one hand is slidably supported on the cross member 10 and on the other hand is guided along a rod 21. The rod 21 with an axis-parallel course to the cross member 10 is fastened between two plates 22. Between the plates 22, the guide area of the block 19, which is secured on both sides by limit switches 33, extends approximately. To adjust the block 19 in the y direction, i. H. along the rod 21, the block 19 has an actuator 5.1 in the form of a rack and pinion drive, which is operated by a servo link 6.1. The servo link 6.1 interacts with a position transmitter 31.1, which delivers signals via the travel y1.

The plow fold head 1 is attached to the arm 11 via a flange connection 27. The flange connection 27 can be released by a quick-release fastener for the quick replacement of the plow fold head 1 when the format is changed. In the interior of the arm 11, a shaft 16.2 leads from a drive at one end of the shaft 16.2 via an angular gear 23 at the head end, arranged at the other end of the shaft 16.2, to an actuator 5.2. The actuator 5.2 can be activated by the servo link 6.2. The rotational movement of the shaft 16.2 in the arm 11 is converted into a straight-line movement in the y direction. This movement causes a displacement of the sides of the plow fold head 1 and a change in the dimensioning of the support body 9.

This is done by transmitting the movement from an angle 24 to a disk 25, on which the plow shoe 8 is attached on one side and which is connected to a roller 7 on the other side. The roller 7 is part of the support body 9 lying in the area of the non-driven part of the track. Moving the angles 24 together and apart causes a corresponding movement of the sides of the plow fold head 1 and thus moving the plow shoes 8 and rollers 7 together and apart by the travel y2 .

A roller 7 forms a toothed pair with another roller 7 arranged in the same axis. With full tooth closure, d. H. The smallest axial width of the rollers 7 of the pair of rollers provides the smallest working width of the support body 4. With increasing axial displacement of the rollers 7, the gaps grow from the tooth tip to the tooth base, and the working width increases.

Various profiles, based on the mother-father principle, can be used for the profile of the positive locking of the pair of rollers. In the case of claws made with parallel edges, rectangular windows are created as gaps. Z-Z-shaped labyrinth gaps are formed on oblique tooth flanks.

The actuating movement and the profile of the rollers 7 can also be carried out differently. So the adjustment is axial / tangential when the rollers 7 interlock spirally.

Since a pair of castors only gives an adjustment stroke of at most one tooth height, it is provided that the support body 9 be formed from several pairs of rollers for larger amounts of the adjustment stroke. The largest adjustment stroke then results in the sum of the design, maximum adjustable column.

The adjustment movement of the support body 9 is transmitted to a small threaded spindle, from which the travel y2 is removed using a position sensor 31.2. A moving tab 29 switches the limit switches 33. The lines of the electrical devices of the plough head 1 lead to a plug connection which is expediently set up for changing heads.

The structure of the support body 9 with a pair of rollers (Fig. 5a), with a larger width with two pairs of rollers (Fig. 5b) can be expanded by integrating normal roller sections 26 (Fig. 5c). In this way, the plow fold head 1 is adapted to the various web width formats and fold formats to be processed for altar folds.

The interlocking of the rollers 7 enables the adjustable travel y2 to be bridged over the width of the supporting body, and consequently the working width of the plough head 1, without the formation of grooves and shoulders. Minor surface interruptions, seen over the circumference, are compatible with flawless printing web processing. They can also be further reduced by choosing a finer division of the interlocking profile on the circumference. Instead of rollers 7 rotating with the web speed, stationary jacket pieces 7 can also be arranged, which are toothed in their supporting area within the web wrapping area likewise in the axial direction or in the axial / tangential direction according to the type of thread pitch, in order to make the support body 9 narrower and wider to guarantee. Instead of a form-fitting pairing of adjacent jacket pieces 7, telescopic pushing of the jacket pieces 7 or rollers 7 into and out of each other is also possible. If the surface is uneven a stretchable cover is provided that spans the width and the wrapping area. The frictional properties of the support body 9 are as low as possible through appropriate selection of materials.

The compulsory longitudinal folding of the web D leads to an irregular web tension course and therefore to no immediate sharp fold formation and superimposition of the folded web part on the continuing web part. For improved fold formation, a further web deflection is set up up to the outlet roller 3, starting from a roller 30.1 or a rod 30.2. The roller 30.1 or the rod 30.2 act as a closing device 30. Without a closing device 30, the later easy opening and inflation of the folded, superimposed web strands is stronger. The holder of the closing device 30 is related to the outlet roller 3 so that its position relative to the outlet roller 3 is retained regardless of the displaceable position of the outlet roller 3.

For this purpose, a bar 37 is connected to the axis of the discharge roller 3 on both sides and on the other side, which can be clamped in a selectable angular position. The strip 37 has an elongated hole 28, approximately radially to the axis of the outlet roller 3, in which one end of the roller 30.1 is to be moved and fastened in the selected position.

With the same fastening angle and spacing left and right, the closing device 30 is axially parallel to the outlet roller 3. The closing device 30 can also be inclined approximately in the direction of the inclination of the part which has not yet been fully driven in. The inclination relates both to the parallelism of the planes which can be laid by the closing device 30 and the outlet roller 3 and to the angular positions of the axis of the axis lying outside of it Locking device 30 for the outlet roller 3, z. B. skewed. In the case of a rod 30.2, which is directed obliquely from a setting point P1 further from the exit roller 3 at the length of the longitudinal fold to a setting point P2 closer to the exit roller 3 at the level of the folded-in web edge or the previously produced longitudinal fold, the oblique course of the longitudinal web fibers which is forced during plow folding more balanced. This is the preferred arrangement of the locking device 30. The operation of the locking device 30 can also be automatically adapted to different distances and direction angles to be set between the plow fold head 1 and the outlet roller 3 by the suspension of the locking device 30 being designed to be traceable.

For example, the tracking is carried out with a coupling 36 between the bar 37 and the plow shoe 8. For the change in the distance between plow fold head 1, plow shoe 8 and outlet roller 3 in the event of adjustment, the coupling 36 has a attachment. The coupling 36 ensures the correct alignment of the blade 35 on the plow shoe 8 and the locking bar 30.2.

Of course, the suspension of the locking device 30 can be designed by means of a suspension point with a cantilevered construction or with the aid of two suspension points.

The actuators 5.1 ... 5.5 created are adjusted with the aid of servo links 6.1 ... 6.5. The individual operating positions are sensed by position sensors 31.1 ... 31.5. The inlet roller 2, outlet roller 3, center position of the plow fold head 1, position of the edges of the plow shoes 8 and working width of the plow fold head 1 can thus be adjusted in a controlled manner. The driven setting positions can be registered by the position sensors 31.1 ... 31.5 and storable. In the case of repeat jobs, the setting data for presetting can be used. The control and arithmetic unit assigned to the device for longitudinally folding the printing web is connected to the master computer of the printing press if required. Both the display of the positioning coordinate values, the plow fold head type according to the format and the driven support dimension, as well as the loading of the servo links 6.1 ... 6.5 are carried out from the control station of the printing press or from a secondary control room. Depending on the format, each plow fold head type may contain an electronic identifier from the outset. If necessary, the positioning systems can also be used to guide the longitudinal fold register.

The device for longitudinally folding a web D can optionally be fed by a web pulling system.

parts list

• 1 Pflugfalzkopf
• 2 Einlaufwalze
• 3 Auslaufwalze
• 4 Walzenverschiebung
• 5 Stelltrieb, 5.1...5.5
• 6 Servoglied, 6.1...6.5
• 7 Laufrolle, Mantelstück
• 8 Pflugschuh
• 9 Stützkörper
• 10 Traverse
• 11 Arm
• 12 Zuggruppe
• 13 Klotz
• 14 Schwenkhebel
• 15 Feststellstift
• 16 Welle, 16.1, 16.2
• 17 Hebemuffe
• 18 Spindel
• 19 Block
• 20 Schwenktrieb
• 21 Stange
• 22 Platte
• 23 Winkelgetriebe
• 24 Winkel
• 25 Scheibe
• 26 Walzenabschnitt
• 27 Flanschverbindung
• 28 Langloch
• 29 Lasche
• 30 Schließeinrichtung, 30.1, 30.2
• 31 Positionsgeber, 31.1...31.5
• 32 Zahnstange
• 33 Grenzschalter
• 34 Gestellwand
• 35 Blatt
• 36 Koppel
• 37 Leiste

Anstellpunkt P1, P2
Bedruckstoffbahn D
Raumkoordinaten, Achsrichtungen, x, y, z
Schwenkrichtung A

• 1 plow fold head
• 2 infeed roller
• 3 outlet roller
• 4 roller displacement
• 5 actuator, 5.1 ... 5.5
• 6 servo link, 6.1 ... 6.5
• 7 roller, jacket piece
• 8 plow shoe
• 9 support body
• 10 traverse
• 11 arm
• 12 train group
• 13 blocks
• 14 swivel levers
• 15 locking pin
• 16 wave, 16.1, 16.2
• 17 lifting sleeve
• 18 spindle
• 19 block
• 20 swivel drive
• 21 rod
• 22 plate
• 23 angular gear
• 24 angles
• 25 disc
• 26 roller section
• 27 flange connection
• 28 slot
• 29 tab
• 30 locking device, 30.1, 30.2
• 31 position transmitter, 31.1 ... 31.5
• 32 rack
• 33 limit switches
• 34 frame wall
• 35 sheets
• 36 paddocks
• 37 bar

Pitch P1, P2
Printing material web D
Spatial coordinates, axial directions, x, y, z
Swivel direction A

Claims (8)

1. Device for the longitudinal folding of a web with a plow folding device deflecting the web between an inlet and an outlet roller,
- which has a plow fold head held on a support structure,
consisting of a support body wrapped around the track with a plow shoe that is flush with the left and / or right side,
- which can be swiveled by at least approx. 180 ° for undershot work,
- in which the plow fold head can be moved transversely (y) to the web running direction (x),
- The span is dependent on the track width or the Palatinate distance in the case of two arranged plow shoes can be specified via the support body design,
- Which has an actuator for the plow fold head acting in the deflection direction (z) of the web,
characterized,
- That a continuously adjusting first actuator (5.1), which can be actuated by a first servo element (6.1), is provided for the displacement of the plow fold head (1),
- That the width can be adjusted in a continuous, continuous manner by means of a second actuator (5.2) narrowing or widening the width of the support body (9), which can be actuated by a second servo element (6.2),
with which the working position of the plow rebate head (1) can be adjusted by superimposing a first and second actuating path (y1, y2) starting from the first and second actuating drive (5.1, 5.2). 2. Device for longitudinally folding a web according to claim 1,
characterized,
that the distances between the inlet (2), outlet roller (3) and plow fold head (1) can be adjusted by means of a roller displacement (4), that the roller displacement (4) engages a third on the inlet (2) or outlet roller (3) or fourth actuator (5.3, 5.4), which can be actuated by a third or fourth servo element (6.3, 6.4), has that the actuator (5.5) for adjusting the plow fold head (1) in the deflection direction (z) with a fifth servo element ( 6.5) is provided, with which the distances between the inlet roller (2), plow fold head (1) and outlet roller (3) can be engaged by the respective servo-driven actuators (5.1 ... 5.5). 3. Device for longitudinally folding a web according to claim 1,
characterized,
that the support body (9) consists of axially or axially / tangentially tooth-shaped or telescopically intermeshing jacket pieces or rollers (7), by means of the mutual displacement of which the second adjustment path (Y2) can be predetermined. 4. Device for the longitudinal folding of a web according to claims 1, 2 and 3,
characterized,
that the actuators (5.1 ... 5.5) or servo elements (6.1 ... 6.5) are coupled to position sensors (31.1 ... 31.5) for tapping the positioning coordinate values and for moving to position. 5. Device for longitudinally folding a web according to claim 4,
characterized,
that the servo elements (6.1 ... 6.5) and position sensors (31.1 ... 31.5) are assigned to a control and arithmetic unit. 6. Device for longitudinally folding a web according to one or more of the preceding claims,
characterized,
that a closing device (30) is arranged to bring the web part to be wrapped with the web part running further up the web to the outlet roller (3). 7. Device for longitudinally folding a web according to one or more of the preceding claims,
characterized,
that the plow fold head (1) is connected to an arm (11) of the support structure via a quick-release fastener (27). 8 apparatus for longitudinally folding a web according to claim 6,
characterized,
that the closing device (30) is connected to the plow fold head (1) via a coupling (36).

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