EP0278120B1 - Zig-zag folding device - Google Patents

Description

The proposed device relates to a zigzag folding apparatus, in particular to the cutting of an endless web folded in such a zigzag folding apparatus with a separating element which can be moved between the sections of the endless web lying on top of one another in zigzag fashion.

Devices of this type are known for example on the basis of DE-PS 30 13 865 or DE-OS 35 02 176. In such devices, an endless web, which is perforated at certain intervals transversely to its running direction, is bent by a zigzag folder of any design along these transverse perforations in such a way that the between the folds, i. H. the perforations lying sections of the web alternately come to lie on each other. This creates a so-called zigzag stack that can be used for other purposes. For example, the web deposited in a zigzag-shaped stack can be pulled off this stack again in order to run to a further printing device. This printing device can consist, for example, of a high-speed printer which prints alphanumeric characters coming from a data processing system onto this web.

In the course of the increase in the number of data processing systems, in particular also of a smaller design, there was a need to be able to buy form webs stored in zigzag stacks in any shop. This in turn presupposes that the stacks to be sold are manageable enough to be transported quickly and easily in everyday use. There is therefore a desire for smaller stacks, for example of approximately 500 or 1000 sections zigzag-stacked.

As can be seen from the above publications, efforts have already been made to separate relatively small zigzag stacks from relatively large stacks. However, this requires a rather complex device, which leads to the fact that the relatively small stacks are quite expensive. The price of the small stacks can, however, be significantly reduced if the individual stacks of forms can be kept small in a single operation during their manufacture (making perforations in the direction of the web and across its direction, printing on the web as a so-called continuous form, etc.) .

Zigzag folders that are common today are often designed in such a way that the zigzag-folded web to be placed in a stack initially leaves the folder in a scale, which is only formed into stacks after it has advanced. In this way, air located between the individual sections of an endless web to be stacked, in particular at higher running speeds of the web to be folded, can be discharged and the sections of the web can be stacked on one another in the desired manner. Zigzag folding apparatuses, in which the web to be deposited are deposited directly in zigzag stacks without forming a scale, are often only suitable for lower speeds of the web to be processed.

The object is therefore to provide a device which allows small stacks to be produced directly in a zigzag folder connected downstream of and interacting with a form printing press, in which the web to be stacked initially leaves it in the form of a scale.

In addition, the scale should be dammed up in such a way that a knife for separating a leading part from the trailing part of the scale can enter the scale.

This object is achieved by a scale of folded sections of the web leaving the zigzag folder, at least two belt systems which support and support the scale and are rotatably mounted on the frame, one of which can be raised and lowered relative to the other, a non-linear movement path of the cutting edge of the separating element , wherein at least a part of the movement path lies essentially tangentially between two superimposed sections of the zigzag-folded scale and a guide device for the separating element, which is pivotably mounted about an axis fixed to the machine above the scale transverse to the direction of travel of the scale.

With the help of the proposed solution, it is no longer necessary to first form relatively large stacks and to split them into smaller stacks in a later operation. Rather, it is possible to achieve small stacks without any further action when leaving the folding machine downstream of a form printing machine in the same work process in which the form is produced, with the machine running at high speed. In particular, it is possible not only to split a stack or a later stack into smaller stacks, but also to start dividing when the copies of a later stack are still relatively loosely shaped next to one another. The scale is divided at the desired point, so that according to one embodiment, stacks are formed with a precisely counted number of zigzag sections one above the other or one next to the other. According to the second exemplary embodiment, stacks are created with a practical need for a sufficiently precise number of sections. Usually this scale is identical to the scale that leaves the zigzag folder of a form printing machine. In this way, the production costs for the production of smaller, later zigzag-shaped stacks can also be significantly reduced if existing folders are used in the production of the forms.

• Fig. 1 zeigt das erste Ausführungsbeispiel.
• Fig. 2 zeigt das zweite Ausführungsbeispiel.
• Fig. 3 zeigt das dritte Ausführungsbeispiel, Ansicht entsprechend Pfeil III in Fig. 6 mit Darstellung des Weges der zu trennenden Schuppe.
• Fig. 4 zeigt eine Ansicht eines Details von Fig. 3 in anderem Maßstab.
• Fig. 5 zeigt Schnitt entlang Linie V-V in Fig. 6 mit Darstellung von Bandleitungssystemen.
• Fig. 6 zeigt einen Schnitt in Richtung der Pfeile VI-VI.
• Fig. 7 zeigt Detail bei VII.

Further features and advantages result from the subclaims and the following description of three exemplary embodiments, the features of which each individually or in groups in any number ger combination to other embodiments can be realized. The exemplary embodiments in no way limit the basic idea of the proposed device. In the present context, non-essential machine parts are not shown in the figures for the sake of a clearer representation, since the parts not shown are sufficiently known to the person skilled in the art.

• Fig. 1 shows the first embodiment.
• Fig. 2 shows the second embodiment.
• Fig. 3 shows the third embodiment, view according to arrow III in Fig. 6 showing the path of the scale to be separated.
• FIG. 4 shows a view of a detail from FIG. 3 on a different scale.
• Fig. 5 shows a section along line VV in Fig. 6 showing stripline systems.
• Fig. 6 shows a section in the direction of arrows VI-VI.
• Fig. 7 shows detail at VII.

Coming from an upstream machine, for example a form printing machine, a web 1 made of paper or plastic, which can consist of one or more layers, enters a zigzag folder 2 of any type. Such a zigzag folder consists for example of channels 3 and 4, which can be pivoted back and forth in the direction of arrow 7 by eccentrically driven cranks 5 and 6. For this purpose, the individual parts of the folder are suspended in a side wall 8 and a further side wall of a corresponding frame, which is arranged parallel to this, in a correspondingly rotatable or pivotable manner.

As a result of the pivoting of the folding channels 3 and 4, the web 1 kinks at the perforations which have already been incorporated into it transversely to its direction of travel and forms kink points 9 and 10 on these perforation lines. The kink points 9 and 10 are in turn formed by circumferential folding spirals 11 and 12 detects and thereby kink even more clearly. In this way, a scale 13 is formed by zigzag superimposing the sections of the web 1 located between the so-called transverse perforations. The individual sections alternate with one another and lie on top of or next to one another in the scale. The folding spirals 11 and 12 are mounted on the side wall 8 or on trusses, which connect two parallel side walls of this type, in a corresponding manner in such a way that they can be adjusted to the position of the kinks 9 and 10.

After the bending process, the scale reaches strips 14, 15 and 16, which represent a first strip line system. Each of the bands 14, 15 and 16 can be subdivided into a plurality of narrow bands arranged one behind the other in the viewing direction of the figure, with an interspace between each two adjacent, parallel bands.

The belt or belts 14 are wound around guide rollers 17 and 18. The belt or belts 15 are wound around the guide roller 18 and the guide roller 19. This is particularly possible if the individual narrow bands 15 protrude like a comb into those areas that are free between two individual bands 14. The belt or belts 16 are looped over the guide roller or concentric guide rollers 19 and 20 arranged one behind the other in the viewing direction of the figure. The belts 16 also protrude on the guide rollers 19 between the individual belts 15.

The belts 14, 15 and 16 run at the speed which is usually necessary for the removal of the scale 13 from the zigzag folder to a stacking point, not shown in the figure. Between the individual distances which the different tapes 16 lying one behind the other in the viewing direction of FIG. 1 maintain, a second tape line system is also provided with several tapes 21 one behind the other in the viewing direction of the figure. The belts 21 run around guide rollers 22 which are arranged, for example, concentrically with the guide roller 20 or individual sections of such a guide roller 20. The belts 21 also run around guide rollers or guide rollers 23, which are each rotatably attached to a pivot lever 24. The one or more pivot levers 24 can be pivoted, for example, with the aid of at least one pressure medium cylinder 25 around the center of the guide roller 19 or the sections of this guide roller 19 which are arranged concentrically one behind the other in the direction of the beam and which in this case take the form of deflection disks or deflection wheels. The belt or belts 21 run at a much slower speed than belts 14, 15 and 16 of the first belt system. The band or bands 21 form a second band system.

When the pressure medium cylinder 25 is actuated, the upper run of the second belt line system 21 passes over the upper run of the belts 16 of the first belt line system, since the guide rollers 23 are pivoted counter-clockwise by means of the pivot lever 24 around the center of the guide roller 19. In this way, at least part of the scale 13 can be supported by the slower rotating second belt system until the part of the scale supported by the slower rotating second belt system by moving the scale 13 in the direction of arrow 26 back onto the belts of the faster rotating first Tape system device.

Trusses 27 and 28 are fastened between the time walls of the zigzag folder. The cross members 27 and 28 are parallel to one another, their geometric axes are perpendicular to the side walls, for example on the side wall 8. The cross members 27 and 28 pass through at least one auxiliary side wall 29 which can be displaced along the cross members 27 and 28. Several of these auxiliary side walls 29 can be used, for example two, but also any other number can be provided on the cross members 27 and 28, with two of these auxiliary side walls corresponding to one another in pairs in the re gel. However, the auxiliary side walls are analogous to each other, so that in the following only one of them needs to be described.

Shafts 30 and 31 are rotatably fastened in the auxiliary side wall 29, at least one of which is driven. The associated drive motor is also attached to the auxiliary side wall 29. A sprocket 32 is attached to the shaft 30, and a sprocket 33 is attached to the shaft 31. The sprockets 32 and 33 run in a different plane than that of the auxiliary side wall 29. The level in which the sprockets 32 and 33 rotate is closer to the viewer of the figure, for example, than the level of the auxiliary side wall 29 which lies and lies behind in the viewing direction parallel to this. The sprockets 32 and 33 are spanned by an endless chain 34, which shows that the chain 34 and the sprockets 32 and 33 lie in a common plane. In addition to the sprockets 32 and 33, further sprockets for guiding the chain 34, for example the sprocket 35, can be held on the auxiliary side wall 29 if required. At least one link of the circulating chain 34 is provided with a pin 36 to which a flap 37 is pivotally attached. The flap 37 is thus held by the chain 34 and the pin 36. In addition, the flap 37 has a first lever arm 38 and a second lever arm 39. A cam roller, a sliding block or the like 40 is attached to the second lever arm 39. The cam roller 40 interacts with a cam 41, which can be fixed with the auxiliary side wall 29. For example, a so-called groove curve is incorporated into the auxiliary side wall 29. However, any other form of a fixed or rotating cam plate is also possible. The curve 41 can be closed in itself, as dashed in the figure and shown with the aid of the dash-dotted lines. However, curve 41 cannot be self-contained, as shown in dashed lines. In this case, it is advantageous that the chain 34 rotates in the clockwise direction, analogous to the movement of the scale 13, that the curve 41 ends approximately below the shaft 31 and is provided with a catch funnel 42 approximately to the right below the shaft 30 to capture the cam roller 40 again after passing through the section of the chain 34 circulation not covered by the curve 41. It can thus be seen that the chain 34 can take a completely different path during its circulation than the course of the curve 41. Characterized in that the pin 36 is attached to the chain, the flap 37 is movably mounted relative to the pin 36, the cam roller 40 is rotatably mounted on the second lever arm 39 of the flap 37 and the contour of the cam 41 is different from the path of the chain 34, Depending on requirements, there is a selectable swiveling movement for the flap 37 when the chain 34 rotates with the aid of a suitable drive.

Analogously to the cross members 27 and 28, a further cross member 43 is fastened between the side walls of the frame of the device. At least one holder 44 can be moved along the cross member 43. Here, too, several brackets can be pushed onto the cross member 43, so that preferably two of these brackets cooperate. However, more than two holders can also have been pushed onto the cross member 43. These brackets are also analogous to each other, so that only one of them needs to be described in more detail.

A spike band 45, a so-called tractor, is rotatably attached to the holder 44 in a known manner. This tractor can in a known manner using a z. B. on the bracket 44 attached drive in the direction of arrow 46. The spikes of the tractor engage in perforations which are worked into a flexible separating element 48 made of metal or plastic. So that the separating element 48 is held securely on the spikes 47, a cover 49 is provided which prevents the separating element 48 from jumping out of the perforations of the separating element 48 in the direction of arrow 46 during the rotation of the barbed tape 45. Cover 49 and spiked band 45 together result in a guiding device which can be pivoted and thus adjustable about the cross member 43 and by means of which the separating element 48 and in particular its cutting edge can be forced onto a specific movement path.

During the back and forth swiveling of the folding channels 3 and 4, the number of swiveling movements is recorded by a counter, not shown. When this counter has reached a predetermined number, the chain 34 is set in motion by means of its drive in such a way that the first lever arm 38 of the flap 37 on the zigzag folder falls into a certain triangular gusset (free space) 50 of the scale which is formed. In this way, a later separation point of the scale - to a later sheet exactly - is provisionally marked. The sections of the web 1 obtained by kinking in the further course of the device initially lie on the flap 37 after it has fallen on it. Characterized in that the chain 34 continues to rotate and the flap 37 can move relative to the scale due to the shape of the curve 41 and follows it, a further triangular, small free space 51 is created. When the scale 13 has moved far enough in the direction of the arrow 26 , the flexible and flexible separating element 48 can first be inserted tangentially to the flap 37 or its first lever arm 38 by rotating the barbed tape 45 into the free space 51. The separating element 48 bends when entering the space 51 and follows a non-linear path, which applies in particular to the cutting edge 52 of the separating element 48 located at the right end of the separating element 48 and its path of movement. If the separating element 48 has penetrated far enough into the free space 51 due to the rotation of the barbed tape 45, its cutting edge 52 meets those bridge-like places at which two sections of the web are separated from one another by the fact that they are separated only by a transverse perforation and on remaining webs are kinked against each other on the remaining webs. If the barbed tape 45 continues to circulate, the ver at the kink between the transverse perforations remaining webs of web 1 are cut with the help of the separating element. Since the holder 44 is pivoted, for example, about the cross member 43, the separating element 48 is flexible and can bend, the separating element 48 can follow the run of the scale 13 for a certain time and tangentially at least over part of its length between two through the kinks 9 and insert 10 formed sections of the web 1. As a result, the movement path 55 of the cutting edge 52 of the separating element 48 becomes non-rectilinear. When the cutting edge 52 of the separating element 48 has approximately reached the vertical 53, the pressure medium cylinder 25 is activated so that the slower rotating second belt system 21 lifts at least part of the scale 13, ie supports it from below. In this way, the scale 13 is stowed with the aid of the separating element 48 and the second belt system. Due to the fact that the left part 54 of the scale 13 in the figure lies on the faster rotating belts of the first belt system (belt 16) despite the activation of the pressure medium cylinder 25, the part 54 is moved relatively quickly in the figure to the left, ie towards a deposit . In this way, parts of the scale 13 are separated from one another, so that it is possible to successively convey several separated partial scales to the storage area. The partial sheds reach the storage in a time interval which is so large that the individual partial sheds can be stored separately from one another.

The fact that the curve 41 can be interrupted in its dash-dotted area, i. H. can only consist of the area shown in broken lines, the cam roller 40 is not forced in this area to follow the curve 41. In this way, there is a very large swivel angle for the flap 37, so that the flap 37 is enabled to largely follow the scale 13 and to keep the free space 51 sufficiently open for the immersion of the separating element 48 in every position of the tracing path. If the cam roller 40 enters the catch hopper 42 during the further circulation of the chain 34 and then follows the cam 41 again, then the flap 37 is brought into a ready position, from which it comes out again when the one with the swivel channels 3 and 4 co-operating counters signal this, can fall back into the wedge 50 (position of the flap 37 shown with solid lines).

In addition to the possibilities shown in the figure, other embodiments are also conceivable, for example the flap 37 can also be pivotably attached to a rotatable turret. In addition, it is also possible that the separating element 48 can not be moved with the aid of the barbed tape 45, but is suspended at a distant pivot point with the aid of a lever arm, so that the cutting edge of such a separating element can be moved on a circular path, for example. A corresponding control for the belt systems, their circulation speed, lifting and lowering the second belt system, stopping, circulation and speed of the chain 34, the barbed belt or the barbed belts 45 and / or counting the kink points of the web 1 or deflections of the pivoting movement of the folding channels 3 and 4 complements the proposed facility.

The details of the tape lines, tape guides or tape systems required to discharge the scale leaving the zigzag folding apparatus from folded later copies can also be implemented in embodiments which differ from the exemplary embodiment described.

The reference numerals of the exemplary embodiment according to FIG. 1 have been adopted in the illustration of the exemplary embodiment according to FIG. 2, provided that these reference numerals coincide with the subject matter of the second exemplary embodiment. In the exemplary embodiment according to FIG. 2, the band 14 of the first band line system is additionally guided around a guide roller 60. The belt 15 or the belts of the belt group 15 wrap around the guide rollers 61 to 64. Thus, the first belt line system of the exemplary embodiment according to FIG. 2 consists only of the belts 14 and 15.

The fulcrum around which the pivot lever 24 can be pivoted together with the guide roller 23 by actuating the pressure medium cylinder 25 is realized in the exemplary embodiment according to FIG. 2 by a pin 65, this pin 65 in a carriage, carriage or the like. 66 is attached. The carriage 66 can be moved by a drive along a guide 67 if necessary. The guide 67 is fixed in the side wall 8 or a part of this side wall. The guide 67 is preferably arranged parallel to the upper run of the belt or belts 15. By an appropriate drive, such as. B. a spindle rotatable by a motor, mounted parallel to the guide 67 or an analog traction mechanism, the carriage or carriage 66 can be moved along the guide 67 at a selectable speed.

The tape or tapes 21 of the second tape line system are guided in the exemplary embodiment according to FIG. 2 around guide rollers 68 or 69 arranged concentrically one behind the other in the viewing direction. The guide roller or rollers 68 are in the machine frame, i. H. for example, the side wall 8 is fixed and rotatable. The guide roller or the guide rollers 69 can either also be mounted in a stationary and pivotable manner in the machine frame or, as shown in the exemplary embodiment, in a holder 70 which can be moved in the direction of the arrow 72 with the aid of a pressure medium cylinder 71. An additional guide roller 73 is supported in the carriage or carriage 66 and is at least partially wrapped around by the belt or belts 21. As in the first exemplary embodiment, the speeds at which the strips of the first strip line system circulate are different from one another. The bands 21 of the second band line system preferably run more slowly than the bands 14 and 15 of the first band line system. However, an inverse ratio of the speeds is also possible.

With the help of the pressure medium cylinders 71 and 25, at least a part of the path which the belt or belts 21 adhere to during their circulation can be lifted so far, if necessary, that the strand or belts 21 now lying at the very top over the upper strand of the tape or tapes 15 comes to rest. The straps 21 can be pushed through gaps which the straps 15 maintain with one another. The fact that the carriage or carriage 66 can be moved along the guide 67, for example to the left in FIG. 2, increases the run of the belts 21 lying at the top as long as the carriage 66 moves to the left. In this way it is possible to support a more or less large section of the scale 13 as required by the slower rotating second belt system, which contains the belts 21. In this way, the scale 13 can be dammed up and / or partially erected at least on part of its path indicated by the arrow 26. This in turn enables the separating element 48 to move more easily between two sections of the transversely formed by kinks 9 and 10 to submerge in their running direction with perforations, to be laid down and folded in a zigzag shape, or to immerse the corresponding sections of the scale 13.

Since the separating element 48 is flexible or flexible, on the other hand it is provided with transport perforations at its edges like an endless form, it can also be wound more or less with the aid of spikes 47 which are arranged on a roller 74. The rear end of the separating element 48 is attached to the roller 74. The roller 74 can be rotated in the desired manner with the aid of, for example, a stepping motor and a corresponding control unit, so that the separating element 48 can be wound up from the roller 74 by this winding device or can be unwound from this roller 74.

The roller 74 and its drive are suitably fastened in a holder 75. The holder 75 is in turn pivoted by means of pins 76 in a window or door-like holding device 77. The holder 75 can be pivoted about the pin 76 with the aid of a pressure medium cylinder 78 and a corresponding control for this pressure medium cylinder.

The holding device 77 can be pivoted by means of hinge joints 79 and 80 fastened in the machine frame in the direction of the arrow 81 about an axis 83 which is essentially perpendicular or at an acute angle 82 to the perpendicular.

To the separating element 48 on certain trajectories, such as. B. 84 or 85, the first channel-like part 86 of a guide 87 is attached to the bracket 75. This channel-like part has, for example, a left and a right cover in FIG. 2, which surround the separating element 48 in such a way that it can pass between the two covers. The second part of the guide device contains a flap 88 which can be pivoted about a point 90 with the aid of a pressure medium cylinder 89. By appropriately controlling the pressure medium cylinders 78 and 89, the movement path of the separating element 48 can be set and selected as desired within wide limits as desired. In this way it is ensured that the separating element between individual sections of the scale 13, i. H. the zigzag folded web 1 also enter substantially tangentially and is able to follow the run of the scale 13 in the direction of arrow 26 even when the separating element 48 is largely unwound from the roller 74, thereby being deeply immersed between the sections of the scale 13 and is essentially tangential between two sections of the web 1 bent in the transverse perforations. Because the separating element 48 is flexible, this advantage is reinforced. Since the separator 48 is flexible and up u. can be processed, the channel-like part 86 of the guide device is preferably straight, the separating element 48 largely unwound from the roller 74 because of its flexibility, for example, where it dips into the scale 13 in the unwound state, can bend and the direction of the scale 13 in the direction is able to follow the arrow 26 for a certain distance and is also pivoted about the pin 76, the overall result is a non-linear movement path for the separating element 48 and in particular its cutting edge 52.

Since the separating element 48 is fastened with its rear end to the roller 74, it can be pulled out of the scale 13 again if the part of the scale in which the separating element 48 has been inserted has the area indicated by the movement paths 84 and 85 in the train has passed through the migration of the scale 13 in the direction of the arrow 26. This applies in particular to the case in which the cutting edge of the separating element 48 was immersed so deeply between the individual sections of the scale that it was able to separate these sections from one another, so that a section of the scale 13 leading in the direction of the arrow 26 and a subsequent one Section of the scale has emerged.

A door-like pivoting holding device 77 is advantageous in order to facilitate access to the folding spirals 11 and 12 if necessary. The holding device for the roller 74 and the separating element 48 can, however, also be implemented in another manner known to the person skilled in the art, provided this appears advantageous. In addition, the carriage or carriage 66 and the path of the belts 21 can be configured differently within the scope of technical skill than that described in the exemplary embodiment. Instead of a single holder 75, several of these holders, for example two mutually parallel ones, can also be fastened to the holding device 77 in an appropriate manner if necessary. A corresponding control for all moving parts complements the device, as well as corresponding drives. Instead of a counter connected to the swiveling channel, other markings can also be used to determine the place or time for the immersion to mark the separating element in the passing scale. For example, colored markings can also be used, such as. B. on the scale or the kinks applied colored strips. Instead of a pivotable fastening for the holder supporting the separating element, another fastening can also be provided, provided that this makes it possible, depending on the choice, to set the point at which the separating element dips into the scale to be divided. For example, this is also possible by means of a corresponding linear guidance.

In the exemplary embodiment according to FIGS. 3 to 7, the first strip line system consists of the strips or strip groups 91, 92 and 93. In the viewing direction of FIG. 3, a plurality of strip lines can be arranged one behind the other, for example the strip lines 93 a, 93 b, 93 c, 93 d and 93 e. These ribbon lines run at a speed around the rollers 94 to 98 which guide them, which corresponds to the speed of migration of the zigzag-folded scale 99. The rollers 94 to 98 can either be mounted directly in the frame 100 of the device or indirectly by interposing a sliding block 101, as indicated for roller 95. Storage with the interposition of a sliding block has the advantage that the respective band can be tensioned. For tensioning the belts, however, it can also be advantageous to mount at least one of the rollers, for example roller 96, in a pair of pivot levers 102 and to pivot the pivot lever or levers 102 by means of a screw 103 around a point 104 of the machine frame 100, wherein the screw or screws 103 are supported on the machine frame 100 with the aid of a bearing 105.

The second strip line system contains circulating strips 106 a, 106 b, 106 c and 106 d. All of the belts 106 loop around guide rollers or guide rollers 107 to 111. The rollers 107, 110 and 111 are mounted in the machine frame, one of them, for example roller 111, being mounted in such a way that the belts 106 can be re-tensioned. For example, at least one spring 112 is provided for this purpose, which is supported on a crossmember 113 of the machine frame 100.

For example, the roller 108 is broken down into individual rollers 108a to 108d. Each of these rollers is attached to an axis 115 with the aid of associated pivoting lever 114. The axis 115 is in turn rotatably supported in auxiliary side walls 116 and 117. A pressure medium cylinder 118 is connected at 119 to one of the pivot levers and at 120 to the respective auxiliary side wall in such a way that the respective pivot lever 114 and thus the rollers 108 can be pivoted if pressure medium is introduced into the pressure medium cylinder 118 in a corresponding manner. The guide roller 109 is mounted in the auxiliary side walls 116 and 117. The corresponding bearings for the guide roller 109 are designated 121 and 122. These bearings can also be omitted if the guide roller 109 is to stand still and thus no longer becomes a guide roller, but rather a guide rod for the strips 106 of the second strip line system. The auxiliary side wall 116 is on a guide 123 and the auxiliary side wall is preferably a round guide, the guide 124 is preferably a flat guide. Both guides are parallel to one another and, as can be seen in FIG. 5, extend essentially parallel to the upper run of the band group 93 of the first band line system, i. H. substantially parallel to a portion of the path that the zigzag fold sheet 99 traverses during the laydown operation. The guide 123 is connected to the side frame 100 a and the guide 124 to the side frame 100 b of the machine frame 100.

The auxiliary side wall 116 is fixedly connected to a chain 125 at the articulation points 126 and 127. The chain 125 is appropriately supported by sprockets 128 and 129 in the side frame 100 a of the machine frame 100. At least one of the chain wheels can be driven in the desired manner with the aid of a corresponding motor 130, for example with the aid of a digitally controlled stepping motor. According to the drive, i.e. H. the operation of the motor 130, the chain 125 can be moved in the direction of arrow 131. This displacement results in a corresponding displacement of the auxiliary side walls 116 and 117 and all the machine parts fastened thereon, since the auxiliary side walls 116 and 117 move in a sled-like manner along the guides 123 and 124. If pressure medium is additionally introduced into the pressure medium cylinder 118 in a suitable manner during the displacement movement, then the guide rollers 108 can be pivoted counterclockwise, for example, about the center of the axis 115. Such a pivoting has the consequence that the upper runs of the belts 106 in FIG. 5 pass between the upper runs of the belts of the belt group 93 and thus lift the scale 99 lying on the belts 93. Since the guide roller 110 in FIG. 1 is substantially lower than the guide roller 107, the amount by which the scales 99 have been lifted above the upper run of the belt group 93 is reduced when the motor 130 is started and the slide-like auxiliary side walls 116 and 117 in Figure 5 from right to left. If the motor 130 is driven at a speed which corresponds to the migration speed of the zigzag-folded scale 99 to be laid down and if the tapes 106 of the second tape line system rotate much more slowly than the tape group 93 of the first tape line system, the scale to be put down is accumulated in such a way that favorable conditions for the entry of a separating device into the zigzag-folded web to be discarded. The point at which the scale is dammed migrates in the same direction as this scale to its final storage location.

A straight guide 132 is attached to the first frame 100 a. This straight guide 132 also runs parallel to the migration path of the scale 99 and thus essentially parallel to the upper run of the band group 93 of the first band line system, as can be seen in FIG. 3. The Straight guide 132 is preferably a flat guide on which rollers 134 and 135 attached to a holding device 133 can be supported. Another eccentrically mounted roller 136 lies against the other side, ie the lower side of the straight guide 132. With the help of the eccentric bearing, any play located between the holding device 133 and the straight guide 132 can be highlighted. The holding device 133 consists essentially of two mutually parallel side walls 133 a and 133 b. The side wall 133 a is supported on the straight guide 132 and the side wall 133 b on an analog guide 137 arranged parallel to the straight guide 132 and fastened to the side frame 100 b. The guide 137 can preferably be a rail guide and with a corresponding supplementary part 138, which is attached to the side wall 133 b of the holding device 133, cooperate. The guide 137 and the supplementary part 138 can, for example, be parts of a so-called star rail guide from Deutsche Star Kugelhalter GmbH, D-8720 Schweinfurt. In this way it is ensured that the holding device 133 is able to follow a path with as little play as possible which is parallel to that of the scale 99 at least on part of the path of the scale 99. In order to enable a corresponding movement of the holding device 133 along the guide 132 and 137, the side walls 133 a and 133 b are each connected to a chain 139. The chains 139 are supported in the machine frame by means of chain wheels 140, 141 and 142. At least one of the chain wheels per chain, for example chain wheel 142, can be slidably mounted in order to be able to tension chains 139. In addition, at least one of the chain wheels involved can be driven, for example, by a stepper motor 143. If the motor 143 is driven in a corresponding manner, the holding device 133 can follow the scale 99 to be deposited.

Each of the side walls 133 a and 133 b is provided with elongated holes 144 and 145. Through these elongated holes, screws 146 and 147 pass through, in order to support the side walls 148 and 149 of the holder 150 for the separating element in such a way that the holder 150 can be adjusted in height against the side walls 133 a and 133 b. An adjustment of the holder 150 relative to the holding device 133 is made possible by an adjusting screw 151, the adjusting screw 151 being supported on the one hand on the side walls 148/149 and on the other hand on a cross member 152 which connects the side walls 133 a and 133 b to one another. Instead of a single adjusting screw 151, several such adjusting screws can also be provided. The side walls 148 and 149 are connected to one another by means of a round cross member 153. Further auxiliary side walls 154 and 155 are pushed onto these round traverses 153. The auxiliary side walls 154 and 155 are connected to one another by guides 156 and 157. Sidewalls 158 and 159 can be displaced along these guides 156 and 157 and, if required, can be located at any point relative to the guides 156 and 157. Tractors 160 and 161 or the like are attached to the side walls 158 and 159. These tractors have spiked belts, the spines of which can engage in transport perforations which are incorporated in the edge regions of the separating element 162. The tractors can be driven in the desired manner by suitable motors and thus move the separating element in the direction of arrow 163. The side walls 148 and 149 of the holder 150 can be pivoted around the center of the round cross member 153 using at least one pressure medium cylinder 164 if necessary. In addition, the holder 150 contains guides 165 to 168, with the aid of which a desired running direction is forced on the separating element 162.

A gripping device, consisting of upper gripper 170 and lower gripper 171, is pivotably attached to the right end of the holder 150 in FIG. 4 with the aid of a joint 169. A pressure medium cylinder 172 is connected to the holder 150 by joint 173 on the one hand and by joint 174 to a holding plate 175 for the upper and lower grippers 170 and 171. With the aid of an eccentric 176 and a motorized adjustment device connected to it, the lower gripper 171 can be approached or removed from the upper gripper 170 as required. The upper and lower grippers can grip at least one kink point of the zigzag-folded web, i. H. hold a position of the scale 99 if necessary, so that the penetration of the separating element 162 into the scale 99 is opposed to resistance. In this way, the separating element 162 can cut through the scale 99 more effectively than if the abutment formed by the grippers 170 and 171 were missing.

Since the holder 150 can be pivoted around the round crossbar 153, which acts like a hinge, with the aid of the pressure medium cylinder (s) 164 in the manner of a window, and furthermore, the guides 165 to 168 for the separating element 162, which represent a guide device, are fastened to the holder 150 and this holder above it can also be adjusted in height by means of the adjusting screws 151, all these devices are fastened on the slide-like holding device 133 and the holding device can be moved along the guides 132 and 137 with the aid of the chains 139, favorable preconditions result for the separating element 162 if desired, enter between two zigzag layers of the scale substantially tangent to it and can migrate with it over part of the way of the scale 99. During this ge hike, the scale can be separated at a desired location with the help of the separating element in such a way that any or almost any number of zigzag sections of the folded web can be separated at the desired location in such a way that in the further course of the process the storage of the scale stack with a desired number of sections lying one on top of the other, ie layers of the zigzag-folded web and thus result in stacks of the desired height and number of sheets. The speeds of the first and second tape line systems are also different from one another in this exemplary embodiment, so that the scale 99 can be dammed up in such a way that the separating element, which is made of a flexible material, can safely and easily enter the desired position between two layers of the scale, together with the latter can walk a certain path and sever the scale during this hike. The fact that the separating element and thus the path of movement of this separating element can be largely adjusted opens up far-reaching possibilities for also processing materials of all kinds, such as thick or thin papers, plastic films or the like. The fact that all the interacting parts are connected to one another with as little play as possible ensures that all the operations necessary for severing the scale to be deposited can also be carried out with the necessary precision. A corresponding control device for a wide variety of engines and pressure cylinder complements the described device and ensures that all operations can be timed to each other exactly and to the required extent. This control device can comprise, for example, a computing device or a so-called microprocessor and corresponding auxiliary devices.

The front edge of the separating element is preferably beveled, so that at least one point or cutting edge separating the web or the scale is produced. However, it is also possible to provide a plurality of cutting-like tips on the cutting edge of the separating element, in particular if a plurality of scales lie behind one another at the same time in the viewing direction of FIGS. 1 to 3. In addition, it is also possible to optionally combine features of the third exemplary embodiment with those of the first two exemplary embodiments as well.

• 1 lane
• 2 zigzag folder
• 3 channel
• 4 channel
• 5 crank
• 6 crank
• 7 arrow
• 8 side wall
• 9 kink
• 10 kink
• 11 spiral
• 12 spiral fold
• 13 scale
• 14 volume
• 15 volume
• 16 volume
• 17 guide roller
• 18 guide roller
• 19 guide roller
• 20 guide roller
• 21 volume
• 22 guide roller
• 23 guide roller
• 24 swivel levers
• 25 pressure cylinder
• 26 arrow
• 27 traverse
• 28 traverse
• 29 Auxiliary side wall
• 30 wave
• 31 wave
• 32 sprocket
• 33 sprocket
• 34 chain
• 35 sprocket
• 36 cones
• 37 flap
• 38 first lever arm
• 39 second lever arm
• 40 cam roller
• 41 curve
• 42 catch funnels
• 43 traverse
• 44 bracket
• 45 barbed tape
• 46 arrow
• 47 sting
• 48 separating element
• 49 cover
• 50 gussets
• 51 free space
• 52 cutting edge
• 53 upright
• 54 part
• 55 trajectory
• 56
• 57
• 58
• 59
• 60 guide roller
• 61 guide roller
• 62 guide roller
• 63 guide roller
• 64 guide roller
• 65 cones
• 66 sledges, wagons or the like
• 67 leadership
• 68 guide roller, guide roller
• 69 guide roller, guide roller
• 70 bracket
• 71 pressure cylinder
• 72 arrow
• 73 guide roller
• 74 roller
• 75 bracket
• 76 cones
• 77 holding device
• 78 pressure cylinder
• 79 hinge joint
• 80 hinge joint
• 81 arrow
• 82 angles
• 83 axis
• 84 trajectory
• 85 trajectory
• 86 1st part of the guidance system
• 87 control device
• 88 flap
• 89 pressure cylinder
• 90 point
• 91 band group
• 92 band group
• 93 band group
• 94 roller
• 95 roller
• 96 roller
• 97 roller
• 98 roller
• 99 dandruff
• 100 frames
• 100 a side frame
• 100 b side frame
• 101 sliding block
• 102 swivel lever
• 103 screw
• 104 point
• 105 bearings
• 106 tapes
• 107 Guide roller / guide roller
• 108 guide roller / guide roller
• 109 guide roller / guide roller
• 110 guide roller / guide roller
• 111 guide roller / guide roller
• 112 spring
• 113 traverse
• 114 swivel lever
• 115 axis
• 116 auxiliary side wall
• 117 auxiliary side wall
• 118 pressure cylinder
• 119 pivot point
• 120 articulation point
• 121 storage
• 122 storage
• 123 leadership
• 124 leadership
• 125 chain
• 126 pivot point
• 127 pivot point
• 128 sprocket
• 129 sprocket
• 130 engine
• 131 arrow
• 132 straight guidance
• 133 holding device
• 133 a side wall of the holding device
• 133 b side wall of the holding device
• 134 rolls
• 135 rolls
• 136 eccentrically mounted roller
• 137 leadership
• 138 supplement
• 139 chain
• 140 sprocket
• 141 sprocket
• 142 sprocket
• 143 stepper motor
• 144 slot
• 145 slot
• 146 screw
• 147 screw
• 148 side wall
• 149 side wall
• 150 holder (for the separating element)
• 151 adjusting screw
• 152 traverse
• 153 round traverse
• 154 additional auxiliary side panels
• 155 additional auxiliary side panels
• 156 leadership
• 157 leadership
• 158 side wall
• 159 side wall
• 160 tractor
• 161 tractor
• 162 separating element
• 163 arrow
• 164 pressure cylinder
• 165 leadership
• 166 leadership
• 167 leadership
• 168 leadership
• 169 joint
• 170 top gripper
• 171 lower gripper
• 172 pressure cylinder
• 173 joint
• 174 joint
• 175 holding plate
• 176 eccentrics

Claims (17)

1. Device for severing a zigzag-folded endles web (1) leaving a zigzag folding device (2) by means of a severing element (48) movable between the portions of the endless web which rest of one another in zigzag form, characterized by a stream (13) of folded portions of the web (1) leaving the zigzag folding device (2), by at least two band systems (14, 15, 16, 21) conveying and supporting the stream (13) and rotatably mounted fixedly relative to the frame, one (21) being raisable and lowerable in relation to the other (14, 15, 16), by a non-rectilinear path of movement (84, 85) of the cutter of the severing element (48), at least part of the path of movement (55, 84, 85) being essentially tangential between two portions of the zigzag-folded, stream (13) lying on one another, and by a guide device (49, 45, 86, 87, 88) for the severing element (48) which ia mounted pivotably about an axle (43, 76) arranged above the stream (13) fixedly relative to the machine and transversely relative to the running direction (26) of the stream (13).

2. Device according to Claim 1, caracterized by at least one flap (37) which is fastened pivotably to at least one itself rotating mounting (34, 36) and which is intended for premarking a, subsequent severing point, and by different speeds of the bands (14-17, 21) of the two band systems.

3. Device according to Claims 1 and 2, characterized in that the mounting (34, 36) of the flaps consists of at least one rotating chain (34).

4. Device according to Claims 1 to 3, characterized by at least one cam guide (41) controlling the flaps (34).

5. Device according to Claims 1 to 4, characterized in that the path of the rotating chain (34) is different from the contour of the cam guide (41).

6. Device according to Claim 1, characterized by a band guide respectively supporting at least part of the zigzag-folded stream/web (13, 1) and containing two band systems (14-16, 21), by different speeds of the two band systems (14-16, 21), and by a guide device (45, 49, 86-88) for the severing element (48), at least part of the guide device (45, 49, 86-88) being adjustable.

7. Device according to Claims 1 and 6, characterized by a winding device (74) for winding up and unwinding the severing element (48).

8. Device according to Claims 1, 6 and 7, characterized by a retaining device (77) pivotably mounted in a window-like manner in the machine frame and intended for the severing element (48) and for its winding device (74).

9. Device according to Claim 6, characterized by an adjusting device (78, 89) each for the severing element (48) and for the guide device (45, 49, 86-88).

10. Device according to Claims 1 and 6, characterized in that the severing element (48) is flexible.

11. Device for severing a zigzag-folded endless web (1) leaving a zigzag folding device (2) by means of a severing element (162) movable between the portions of the endless web resting on one another in zigzag form, characterized by a stream (99) of folded portions of the web (1) leaving the zigzag folding device (2), by at least two band systems (91, 92, 93, 106) conveying and supporting the stream (99) and rotatably mounted fixedly relative to the frame, at least part of one (106) being raisable and lowerable in relation to part of the other (93), by a rectilinear path of movement (163) of the cutter of the severing element (162) arranged at an acute angle to the path of movement of the stream (99), at least part of the path of movement being essentially tangential between two portions of the zigzag-folded stream (99) lying on one another, and by a guide device (133, 150, 165 to 167) or the severing element (162) which is mounted displaceably, essentially in the running direction of the stream (99), along a guide (132, 137) arranged essentially parallel to the path of the stream and fixed to the machine.

12. Device according to Claim 11, characterized by a band guide respectively supporting at least part of the zigzag-folded stream/web (99) and containing two band systems (91 to 93, 106), by different speeds of the two band systems (91 to 93, 101), and by a guide device (148 to 150, 165 to 167) for the severing element (162), at least part of the guide device (148 to 150, 165 to 167) being adjustable.

13. Device according to Claims 11 and 12, characterized by a retaining device (150) pivotably mounted in a window-like manner on the displaceable mounting (133) and intended for the severing element (162).

14. Device according to Claims 11 and 12, characterized by an adjusting device (146, 147, 151, 164) each for severing element (162) and guide device (148 to 150, 165 to 167).

15. Device according to Claims 11 to 14, characterized in that the severing element (162) is flexible.

16. Device according to Claims 1 and 11, characterized by at least one gripper (170, 171) which detects at least one bending point of the web (1) bent to form a stream (99) and which is closable as required, the gripper (170, 171) being fastened to that end of the mounting (150) for the guide device (148 to 150, 165 to 167) of the severing element (162) which faces the stream (99).

17. Device according to Claims 1 and 11, characterized by an essentially play-free fastening of the retaining devices and mountings to the respective supporting machine parts.

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