Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
  • B41F—PRINTING MACHINES OR PRESSES
  • B41F13/00—Common details of rotary presses or machines
  • B41F13/02—Conveying or guiding webs through presses or machines
  • B41F13/03—Threading webs into printing machines
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H45/00—Folding thin material
  • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
  • B65H45/22—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement
  • B65H45/221—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement incorporating folding triangles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H45/00—Folding thin material
  • B65H45/12—Folding articles or webs with application of pressure to define or form crease lines
  • B65H45/22—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement
  • B65H45/221—Longitudinal folders, i.e. for folding moving sheet material parallel to the direction of movement incorporating folding triangles
  • B65H45/226—Positional adjustment of folding triangles
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
  • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
  • B65H2301/00—Handling processes for sheets or webs
  • B65H2301/50—Auxiliary process performed during handling process
  • B65H2301/52—Auxiliary process performed during handling process for starting
  • B65H2301/522—Threading web into machine

Definitions

• the invention relates to devices and methods for drawing in at least one web of material or at least one web strand into a folder according to the preamble of claim 1, 2, 3, 44, 46, 52 or 53.
• a folder such as B. from WO 00/56652 A1 comprises a superstructure in which paper webs fed from one or more printing units are brought together, possibly cut lengthways and placed one above the other, at least one former, on each of which one in the superstructure consists of one or more paper webs merged web strand is folded lengthways, and a cross cutting device in which the lengthwise folded web strand is broken down into individual products.
• the cross-cutting device is often implemented by a rotating knife cylinder, the knives of which cooperate with an abutment on a gripper or folding knife cylinder to cut the web strand.
• the grippers of this cylinder hold the products separated by the cross-cutting device on the surface of the cylinder and convey them to a transfer gap between the folding knife cylinder and a folding jaw cylinder, where a folding knife extends from the folding knife cylinder, around the product held on it, along a transverse center line to be inserted into a folding jaw of the folding jaw cylinder and thus folded transversely.
• the folding former can be shifted in accordance with the width of the webs to be processed in such a way that a web folded onto it enters the cross-cutting device exactly in the center. This is important for a trouble-free functioning of the cross-cutting device and above all of the subsequent cross-folding device.
• DE 42 10 190 A1 discloses a cross-cut device with an integrated switch which is arranged between pulling rollers and folding cylinders.
• DE 101 28 821 shows a device for bringing together paper webs during the drawing in.
• US 3 125 335 A discloses a device for pulling material webs by means of belts.
• the invention has for its object to provide devices and methods for pulling at least one web of material or at least one web strand into a folder.
• the object is achieved by the features of claim 1, 2, 3, 44, 46, 52 or 53.
• the guide rail guided along the folding former can at least bring the web strand directly up to the cross-cutting device; Beyond that, aids for automated threading of the strand are no longer necessary, since there is no longer a continuous strand here, but only individual products.
• the guide rail is preferably twisted at the height of the former, preferably by approximately 90 °.
• the former can preferably be displaced parallel to the longitudinal axis of the cross-cutting device.
• a section of the guide rail lying in front of the former in the running direction of the web former should be stretchable.
• the guide rail should have a joint section between the entrance of the former and the cross-cutter.
• the articulated section can be implemented in a simple manner by one or more lateral incisions in the guide rail. In particular, this allows the guide rail to be realized in one piece over the joint section.
• the guide rail preferably has a groove, in particular a longitudinal groove with a bottom and two side walls, in which the holding part is guided, and the incisions each cut through one of the side walls and the bottom, so that they do not severed side wall is comparatively slightly flexible.
• the guide rail is extended beyond the cross cutting device, so that a web strand can be pulled through the cross cutting device with the aid of a holding part guided on the guide rail.
• the cross-cutting device must then be in an open position during the pulling in of all material webs of the web strand, and only when the material webs are completely drawn in can the cross-cutting device be started in order to cut off white waste forming the leading section of the web strand.
• a cross-cutting device can be provided in front of the cross-cutting device for separating leading white waste from the web strand, and an input of the cross-cutting device is arranged in an extension of the direction of passage of the web strand through the cross-cutting device, so that after the white waste has been severed, the usable part of the web strand into the cross-cutting device runs in without needing a guide through the guide rail.
• its entrance is preferably arranged vertically below the cross-cutting device, so that the tip (beginning of the web) of the usable part of the web strand is guided by gravity into the entrance of the cross-cutting device.
• the guide rail preferably has a bend between the trimming device and the entrance of the cross-cutting device and runs past the entrance of the cross-cutting device.
• a storage device for holding holding parts which is arranged in an extension of the guide rail beyond the folding former, allows several material webs to be pulled in one after the other during a pulling-in process, without the holding part of a material web having to be moved back to its starting point in the meantime, around the guide rail for the holding part of another material web vacate.
• the memory can be formed in a particularly space-saving manner by a spiral or helical rail piece which is able to accommodate one or more holding parts one after the other.
• a separating device for separating the holding parts from their respective material webs is expediently arranged upstream of the memory, so that the leading sections of the material webs carried along by the holding parts do not also have to be accommodated in the memory.
• the separating device is expediently arranged on the guide rail between the bend and the memory.
• the guide rail can extend continuously from a reel changer of a printing unit upstream of the folder into the folder.
• the superstructure of the folder preferably has several paths, on each of which at least one Material web can be guided through the superstructure and to the cross-cutting device, and a plurality of rail pieces, which run along each of these paths, unite with the guide rail in front of the cross-cutting device.
• a switch is preferably arranged at the merging points of the rail pieces.
• an adhesive preparation device is preferably arranged upstream of a union point and serves to locally make a web strand passing through it so that it adheres to a second, already drawn web strand.
• the adhesive preparation device can be an adhesive tape dispenser for a double-sided adhesive tape or a glue dispenser.
• the glue preparation device In order to actuate the glue preparation device in good time, it is preferably assigned a sensor for detecting a start of the path that passes through it.
• the pulling in of material webs into a folder as described above preferably comprises the following steps: a first material web is guided on the guide rail to a point at which one of the rail pieces unites with the guide rail, a second material web is guided on the rail piece to exactly this point and attached to the first web of material, and the material webs fastened together are continued on the guide rail and introduced into the cross-cutting device.
• the insertion of the material webs is expediently synchronized to one another in such a way that the second material web is only led to the union point when the holding part of the first material web has passed this point and thus does not hinder the movement of the holding part of the second material web.
• a pull-in method is also conceivable, in which first a first material web is guided on the guide rail to a point at which one of the rail pieces unites with the guide rail, and, when the holding part of the first material web has passed this point, a second material web on the rail piece to this point and from there on the guide rail to the cross cutting device.
• the material webs can be passed through the cross-cutting device, in which case the cross-cutting device expediently remains at rest until all the material webs have been pulled through, so that nothing held by the cross-cutting device is damaged.
• the material webs can be passed through a cross-cutting device upstream of the cross-cutting device and first past the cross-cutting device with the aid of the guide rail, and only when the tips of all material webs held on the holding parts have passed the cross-cutting device, is this actuated to pull the strand of the material webs cut and let the leading end resulting from the cutting enter the cross cutting device. If the cross-cutting device is already moved in the correct phase during the pulling-in, it can correctly separate it into products from the moment the web strand begins to enter the cross-cutting device.
• a pair of pull rollers of the printing machine or the folding device is preferably switched off during the pulling in of a material web, but will be stopped as soon as the leading one passes through The end of the material web or of the web strand is detected by the pair of pull rollers, driven and driven in such a controlled manner that a pull tension exerted by the pair of pull rollers approaches a target value intended for continuous printing operation.
• Figure 1 is a schematic side view of a device for drawing.
• FIG. 2 shows a detailed view of a guide rail and a holding part guided in the guide rail for a material web to be drawn in;
• Fig. 3 is a detailed view of the device in the perspective of Fig. 1;
• FIG. 5 is a partial frontal view of the device;
• Fig. 6 is a partial frontal view of a superstructure with two formers;
• FIG. 7 shows a modification of the device from FIG. 5;
• FIG. 8 shows a detailed view of the folding apparatus analogous to FIG. 2 when processing web strands with a reduced width
• FIG. 11 shows an embodiment of a device for drawing in
• Fig. 12 shows an advantageous embodiment of a chain.
• Fig. 1 shows a schematic side view of a folder according to the present invention.
• a coming from a printing unit, not shown, web of material 01, z. B. paper web 01 passes through a chill roll stand 02 and reaches a superstructure 03 of the folder.
• the superstructure 03 comprises a slitter 04 for splitting the incoming paper web 01 into a plurality of partial webs lying next to one another, a turning deck 06 in which the partial webs of the paper web 01 and possibly other paper webs (not shown) are rearranged transversely to the running direction (from left to right in 1) offset and / or turned and then placed on top of each other.
• the path of the paper web 01 extends over an arrangement of compensating rollers 07 for web length compensation and tension control to a former 08.
• Folding former 08 and compensating rollers 07 are held in a common frame in the lateral direction of FIG. 1 and are shown twice in FIG. 1, in positions offset from one another, in order to clarify this fact.
• a guide rail 09 extends along the path of the paper web 01, shown in FIG. 1 as a thick black line.
• the guide rail 09 is shown from its entry into the cooling roll stand 02 and to the lower end of the former 08; it preferably extends without interruption from the roll changer of a printing unit upstream of the folder, not shown in FIG. 1, to the former 08 or beyond.
• the guide rail 09 has a U-shaped or, as shown in FIG. 2, or C-shaped cross section, in the groove 23, in particular the longitudinal groove 23, a chain piece 51 is guided in each case.
• the chain piece 51 is made up of alternating one- or two-segment links 52; 53, at least one of which carries an arm 19 reaching out of the groove 23.
• two adjacent links 53 jointly carry an arm 19.
• Chain piece 51 and arm ⁇ 9 are also referred to below as holding parts 51, 19.
• a hook at the end of the arm 19 is provided in order to fasten the leading end 54 of a paper web 01 to be newly drawn in or a drawing-in tip connected to the leading end 54 by means of a loop looped around it.
• the one-segment links 52 are elastic in themselves, for. B. by being made in one piece from an elastic material, or by having an elastic center piece (not shown in FIG. 2) made of spring steel or the like, and thus enable the chain piece 51 to be twisted about an axis parallel to the longitudinal direction of the guide rail 09 and a bend of the chain piece 51 by one to the level of Paper web 01 vertical axis.
• Motors (not shown) are attached to the guide rail 09 at regular intervals, each of which carries a sprocket which passes through a gap in the side of the guide rail 09 in its groove 23 and, if appropriate, between the links 52, 53 at the location of the sprocket located chain piece 51 engages.
• the length of the chain piece 51 is selected to be slightly larger than the distance between two successive chain wheels along the guide rail 09, so that it is ensured that when the chain piece 51 is conveyed along the guide rail 09, at least one chain wheel is always in engagement with the chain piece 51 and this drives.
• FIG. 3 shows an enlarged view in the same perspective as Fig. 1, the former 08 and its surroundings.
• the course of the guide rail 09 or a paper web 01 drawn in by it is shown in FIG. 3 as a dash-dotted line.
• two further rail pieces 12 meet; 13, shown as a dotted or evenly dashed line, together with the guide rail 09.
• a sensor 14, z. B On each of the rail sections 12; 13 is located just before the point of union with the guide rail 09, a sensor 14, z.
• a photocell 14 for detecting the presence of a drawn-in paper web 01 and a glue preparation device 16 for applying adhesive 15.
• the glue preparation device 16 can be designed to apply a strip of liquid adhesive to the leading section of a paper web 01 which runs along the rail section 12 or 13 is led past it; a possible structure of such a device is such. B. described in EP 04 77 769 B1.
• an adhesive tape dispenser could also be considered as the adhesive preparation device 16, which, as soon as the Photocell 14 indicates the arrival of a paper web 01, is shifted in the width direction of the paper web 01 in order to roll a strip of double-sided adhesive tape thereon.
• the adhesive preparation device 16 can also consist of a plurality of adhesive spray nozzles which are distributed across the width of the paper web 01 and to which a photocell 14 is assigned in each case, in each case at the moment when the leading edge of a paper web 01 passes one of the adhesive nozzles to cause a dose of adhesive to be sprayed onto paper web 01. This can be seen in particular in the area of FIG. 5 lying above the former 08.
• the point in time at which the paper web 01 guided along the rail section 12 meets the unification roller 11 is selected such that at this point in time a chain piece 51, which has already drawn in the paper web 01 running along the guide rail 09, 13, passes the unification roller 11 has, so that the chain piece 51 coming from the rail section 12 can change to the guide rail 09 and can be further conveyed on the latter.
• the web strand thus obtained passes through a separating device 17, e.g. B. a funnel-separating device 17 with a rotating knife and an abutment roller, which is used on all paper webs passing through it, the tip of which is already glued to a paper web 01 which is drawn in further than itself, ie in particular via the rail pieces 12; 13 fed paper webs, the connection no longer required at this point between the arm 19 and the tip of the paper web.
• the web strand is deflected again at a funnel inlet roller 18 and reaches the sloping, tapering surface of the former 08.
• As the web strand is pulled over the side edges of the former 08, its orientation changes; an orientation that is essentially perpendicular to the plane of FIG.
• the guide rail 09 is twisted by 90 ° in a section 21 following the hopper inlet roller 18, as shortened in the longitudinal direction of the guide rail 09 for reasons of better representation - as shown in FIG. 4 ,
• a piece of the hopper inlet roller 18 and the former 08 are shown; the axis of the hopper inlet roller 18 is aligned parallel to the plane of FIG. 4.
• the groove 23 gradually turns forward in the perspective of FIG. 4, and bolts 22 and links 52; 53 of the chain caught in the groove 23 become visible.
• the orientation of the chain piece 51 is retracted by 90 ° and the arm 19 carried by it protrudes transversely to the plane of FIG. 4.
• the three arms 19 shown in FIG. 4 do not, of course, represent three arms 19 of the same chain piece 51, but rather one and the same arm 19 in different phases of the movement along the guide rail 09.
• the twisting ensures that the paper webs 01 also follow Passage through the former 08 can still be guided exactly.
• FIG. 5 shows the same structure as FIG. 3 from a perspective turned through 90 °.
• the guide rail 09 runs vertically downwards between conveyor rollers which move away from each other during the web retraction are turned off so as not to impede the passage of an arm 19 carrying a web tip.
• the guide rail 09 is guided past the cutting gap of a cross-cutting device 24 such that the paper webs 01 are introduced into the cutting gap of this cross-cutting device 24.
• the cross cutting device 24 comprises a cylinder 26, e.g. B. knife cylinder 26 and a cylinder 27, z. B.
• gripper cylinder 27 and / or folding knife cylinder 27, are arranged on the abutment, not shown, made of hard rubber, which cooperate with the knives of the knife cylinder 26 when the cross cutting device 24 is in operation.
• the cylinder 27 is preferably designed as a folding knife cylinder 27 and has holding elements, for. B. grippers or punctures. While the paper webs 01 are being drawn in, the cylinders 26; 27 of the cross cutting device 24 in the position shown with knives 28 of the knife cylinder 26 oriented essentially on a line parallel to the guide rail 09, so that between the cylinders 26; 27 a gap is open through which the paper webs 01 can be drawn.
• FIG. 12 An advantageous embodiment of the chain 51 is shown in FIG. 12.
• the chain 51 each has rollers mounted on bolts 22, the bolts 22 being connected at a distance by means of brackets. So that the chain 51 can not only perform a pivoting movement about the longitudinal axes of the bolts 22, z. B. the holes in the tabs slightly larger than the diameter of the bolt 22, so that the chain 51 can be bent transversely to the running direction or in the longitudinal axis direction of the bolt 22. In the curved state, this results in a maximum radius of curvature R51 of 1000 mm or preferably less than 600 mm, particularly preferably less than 500 mm.
• the front fold separating device 30 serves to separate the pieces of rail 32; 33 fed strands from their holding parts; the rear separates the paper web 01, which is drawn in first and forms the tip of the web strand entering the cross-cutting device 24, from its holding part.
• the cross cutting device 24 can be started. With the first cut, the tips of all paper webs " ⁇ 1 of the web strand drawn through are cut off.
• FIG. 6 shows, in a perspective analogous to FIG. 4, an embodiment of the folding apparatus with two adjacent folding formers 08 for processing four-page wide paper webs 01.
• each of the folding folders 08 has its own guide rail 09 for guiding paper webs 01 through the cross-cutting device 24 assigned.
• one advantage of the parallel guide rails 09 is that two holding parts can pass through the cross cutting device 24 at the same time, so that it takes less time to pull in the paper webs 01, and that the total amount of paper that has to be pulled through until the holding parts of all paper webs 01 Cross cutting device 24 have passed is significantly reduced.
• FIG. 7 and 11 show alternative configurations of the course of the guide rail 09 at the entrance of the cross-cutting device 24.
• a cutting device 36 is arranged in front of the entrance of the cross-cutting device 24 for cutting the web strand drawn through.
• the guide rail 09 crosses the cutting device 36 in the vertical direction directly above an input gusset of the cross cutting device 24.
• the guide rail 09 has a curved section 37 and runs above a guide plate 38 in the lateral direction to a separating device 39, which in this case is the head section of each they pass paper web 01 from their stop.
• the web strand that has become guide-free beyond the separating device 39 falls freely and is ejected from the folder; the holding part is conveyed further into one or more stores 41, shown here as a spirally wound guide rail.
• An alternative space-saving design of the memory 41 is a helically curved guide rail, preferably with the axes of the cylinders 26; 27 parallel longitudinal axis.
• the cylinders 26; 27 of the cross cutting device 24 rotate in phase-synchronous fashion with drawing rollers of the folder or parts of the printing machine located in front of it, before all paper webs 01 are completely drawn in.
• the cutting device 36 cuts through the web strand once.
• a switch 42 arranged in the entrance gusset of the cross-cutting device 24 changes from its solid position to the dashed position in order to securely insert the newly formed leading edge of the web strand into the cross-cutting device 24. Since this can already run at a rotational speed adapted to its conveying speed at the time the web strand is cut, the time required to reach stationary printing conditions is shortened, and with it the amount of waste that is produced when the printing press is started up.
• sensors such as the photocells 14 for detecting the presence of the paper web can be used on pairs of pulling rollers which a paper web 01 travels on the way from the reel changer to the cross-cutting device 24 and which are separated from one another during the drawing in of the paper web 01 01 are provided which, as soon as they recognize the passage of a paper web 01 through the pair of draw rollers, cause the draw rollers to be brought into contact with one another and driven in order to produce a predetermined tension on the paper web 01 in question.
• an adjustment of their tensile stress to the values desired for the stationary printing operation can begin, which likewise shortens the time required to achieve these stationary conditions.
• the frame which contains the former 08, the combining roller 11, the rail pieces 12; 13 and the compensating rollers 07 carries to shift a distance a / 2 to the left.
• the guide rail 09 can be telescopically extended in a region 43 (see FIG. 1) between the turning deck 06 and the compensating rollers 07 or can be changed in length in another suitable manner and in each case in regions 44; 46 at the top or at the foot of the former 08 in the manner of a joint section 44; 46 designed to be flexible in order to enable the holding parts to pass smoothly through the folder up to the memory 41 in any position which the former 08 can assume.
• FIGS. 9 and 10 show a plan view of a flexible section 44 or 46 and FIG. 10 shows a section through the guide rail of FIG. 9 at the line X-X of FIG. 9.
• the section plane is laid through one of several incisions 47 , which are formed in the flexible region 44 or 46 to form a plurality, each alternately from different sides of the guide rail 09, and in each case cut through the side walls 48 thereof.
• the side wall 48 which remains in each case at the level of the incisions 47 is considerably easier to bend than the guide rail 09 which has not been cut, and above all it enables the guide rail 09 to be bent in one plane without simultaneous twisting.
• FIG. 8 A configuration of the guide rail 09 in which you above the flexible area 44; 46 lying section is bent to the left is shown as a dotted outline in Fig. 8.
• the incisions 47 are alternately narrowed or widened depending on the orientation.
• the width of the incisions 47 and the extent of the bending are exaggerated; in practice, the width of the incisions 47 and their deformation must not be so great that the smooth passage of the chain links through the groove 23 is endangered.
• this requirement can be met without difficulty, since the required freedom of movement of the guide rail 09 is not more than a few degrees and the widening of the individual incisions 47 during a bend is of course the smaller, the greater the number.
• a distance X of the guide rail 09 from the paper web 01 is also advantageous for the entire folding structure, i. H. at least from the former folding roller 18, which conveys the unfolded paper web 01, over the path of the folding former 08 to its tip.
• the pulling-in process is preferably carried out by the printing units assigned to the web path while they are not printing.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
• Auxiliary Devices For And Details Of Packaging Control (AREA)
• Replacement Of Web Rolls (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Related Child Applications (1)

Publications (2)

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• 2004
  • 2004-07-07 DE DE102004033036A patent/DE102004033036A1/de not_active Withdrawn
• 2005
  • 2005-03-16 ES ES05717072T patent/ES2309729T3/es not_active Expired - Lifetime
  • 2005-03-16 JP JP2007504404A patent/JP4523638B2/ja not_active Expired - Fee Related
  • 2005-03-16 WO PCT/EP2005/051207 patent/WO2005092614A2/fr not_active Ceased
  • 2005-03-16 AT AT05717072T patent/ATE405418T1/de not_active IP Right Cessation
  • 2005-03-16 DE DE502005005109T patent/DE502005005109D1/de not_active Expired - Lifetime
  • 2005-03-16 EP EP07123681A patent/EP1930162B1/fr not_active Expired - Lifetime
  • 2005-03-16 EP EP05717072A patent/EP1727675B1/fr not_active Expired - Lifetime
  • 2005-03-16 US US10/594,450 patent/US7387601B2/en not_active Expired - Fee Related

Non-Patent Citations (1)

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