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EP0697989B1 - Device for stream feeding of sheets onto a stack - Google Patents

Device for stream feeding of sheets onto a stack Download PDF

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Publication number
EP0697989B1
EP0697989B1 EP94913583A EP94913583A EP0697989B1 EP 0697989 B1 EP0697989 B1 EP 0697989B1 EP 94913583 A EP94913583 A EP 94913583A EP 94913583 A EP94913583 A EP 94913583A EP 0697989 B1 EP0697989 B1 EP 0697989B1
Authority
EP
European Patent Office
Prior art keywords
conveying
sheets
braking
conveying direction
stacking
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP94913583A
Other languages
German (de)
French (fr)
Other versions
EP0697989A1 (en
Inventor
Hans-Peter Richarz
Dirk LÜNENSCHLOSS
Bernd WÜSTENHAGEN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vits Maschinenbau GmbH
Original Assignee
Vits Maschinenbau GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19934314756 external-priority patent/DE4314756C2/en
Priority claimed from DE9306740U external-priority patent/DE9306740U1/en
Application filed by Vits Maschinenbau GmbH filed Critical Vits Maschinenbau GmbH
Publication of EP0697989A1 publication Critical patent/EP0697989A1/en
Application granted granted Critical
Publication of EP0697989B1 publication Critical patent/EP0697989B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/26—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles
    • B65H29/32—Delivering or advancing articles from machines; Advancing articles to or into piles by dropping the articles from pneumatic, e.g. suction, carriers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/66—Advancing articles in overlapping streams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/686—Pneumatic brakes
    • 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
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/421—Forming a pile
    • B65H2301/4212—Forming a pile of articles substantially horizontal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/11—Means using fluid made only for exhausting gaseous medium producing fluidised bed
    • B65H2406/112—Means using fluid made only for exhausting gaseous medium producing fluidised bed for handling material along preferably rectilinear path, e.g. nozzle bed for web
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/13—Means using fluid made only for exhausting gaseous medium pressure arrangement for compensating weight of handled material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/31—Suction box; Suction chambers

Definitions

  • the invention relates to a device for flaking and depositing sheets on a stack according to the preamble of claim 1.
  • the sheets delivered one behind the other are conveyed with the first and the second conveying direction via the stacking device.
  • the deflection device As soon as the rear edge of a sheet has reached the deflection device, it is deflected downward from the conveying plane.
  • the sheet is then braked by the braking device, so that the leading edge of the following sheet is conveyed over the trailing edge of the first sheet.
  • the sheets scaled in this way are deposited on the stacking device.
  • Devices for shingling and depositing sheets on a stack are used, for example, behind a cross cutter, but also behind sheet printing machines.
  • a device with which sheets of different lengths can be deposited is known from DE-OS 38 12 685.
  • this retarding device for sheet layers sheets or sheet layers arranged one behind the other are fed at a feed speed to a slower-running conveyor so that they overlap.
  • This slightly scaled layer flow passes through a brake gap, which increases the scaling.
  • the brake gap is formed by a braking element which can be displaced in the conveying direction above and below the conveyor.
  • the disadvantage of this device is that the risk of imprints on the sheet is particularly great in a brake gap due to the pressure applied over a very short distance. Especially with sensitive materials, e.g. B. labels, such imprints can hardly be avoided.
  • the conveyors easily lead to impressions even with lower and upper conveyor belts. Delay devices with conveyor belts are also complicated to manufacture and have a large space requirement due to their large extent in the conveying direction.
  • DE-OS 41 19 511 Another device with conveyor belts is known from DE-OS 41 19 511. This device has clamping elements for braking the sheet, which likewise lead to impressions, especially in the case of sensitive materials.
  • DE-PS 23 48 320, DE-PS 25 32 880, DE-PS 26 15 864 and DE-PS 28 41 658 devices for shedding and depositing sheets on a stack are known in which to promote Bow floating slats are used.
  • the braking device is designed as a pivotable suction bar, the drive of a deflection element of the deflection device being synchronized with the drive of the suction bar.
  • This device is only suitable for long sheets of the same sheet length. A possible retrofitting of the drives for a changed arc length is complex, if not impossible. In addition, it is not possible with these drives to quickly bring the suction bar back into its starting position in order to brake short sheets conveyed at a very high speed.
  • the object of the invention is to develop a device for shingling and depositing sheets on a stack according to the preamble of claim 1, with which sheets of different sheet lengths, even of sensitive material, can be deposited without any imprints.
  • the device should be compact.
  • sheets of different sheet lengths can be shingled and deposited.
  • the arc length can be varied between a minimum arc length l min and a maximum arc length l max .
  • the braking device of the device By arranging the brake bands of the braking device in the rear area of the stacking device, i. H. in the area above the leading edges of the deposited sheets, the braking device of the device according to the invention acts on the leading edges of the sheets.
  • the delivered sheets are conveyed on their leading edges through the floating bars of the second conveyor device to the brake bands, braked and put down by these.
  • the brake bands have means, e.g. B. a surface with high friction resistance, which cause the leading edges of the sheets to adhere to them. In addition, they are guided over a certain distance in the conveyor level. By sticking the leading edges of the sheets to the brake bands and a greater distance for braking, the sheets can be braked tightly without the risk of imprints shingled and stored by guiding the sheets above the stack with high stacking accuracy.
  • a variable arc length is achieved in that the brake bands are slidably arranged between the floating bars of the second conveyor; specifically in the rear area of the stacking device, which extends from an area above the front edge of the deposited sheets of minimum sheet length l min to the front edge of the deposited sheets of maximum sheet length l max . Since the floating slats run over the entire stacking device, the leading edges of the sheets can be conveyed through the floating slats to the braking tapes in any position of the brake bands corresponding to the different sheet lengths.
  • a common drive shaft also enables the brake bands to be moved together with less manufacturing effort and less retrofitting.
  • the brake bands can, for example, be guided over rollers, in each case one roller designed as a drive roller being fastened to the drive shaft and the drive shaft being connected to a carrier which can be displaced in the conveying direction.
  • the sheets adhere securely to the brake bands without the risk of leaving marks.
  • the floating slats of the first conveying device described in claim 4 enable the sheets to be conveyed on an air cushion and the transport disks with pressure rollers accelerate the sheets, so that a gap is needed between the sheets for the shed.
  • the transport discs, pressure rollers and brake bands are arranged so that the distance between the transport discs and the brake bands arranged in the foremost position is slightly larger than the minimum arc length l min and the distance between the transport discs and the stacking device is slightly larger than the length of the brake bands in the conveying direction.
  • the arrangement of the transport disks between the suspension rails leads to a more compact design than, for example, the arrangement of a suction conveyor roller described in DE-PS 28 41 658 behind the suspension rails.
  • a deflection device of a device according to the invention with a brush roller and a guide table according to claim 6 has the advantage of a simple structure.
  • the guide table particularly in its front area, can have means for holding the trailing edges of the sheet on the guide table. These agents, for example a slightly rough surface, may only have a slight adhesive effect, so that they do not hinder the guidance of the trailing edges over the guide table.
  • the brush roller is equipped with a separate, variable-speed motor, e.g. B. a servo motor. As a result, sheets of different sheet lengths can be deflected.
  • the brush roller is accelerated to the conveying speed in a time cycle corresponding to the length of the sheet, then decelerated and only accelerated again to deflect the next sheet.
  • the sheets are braked as soon as their rear edges are deflected downward.
  • the brush roller has a hollow roller made of carbon fibers. As a result, the brush roller has a low moment of inertia and can be easily accelerated and braked to different speeds.
  • the leading edges of the sheets are securely guided to the floating strips of the second conveying direction when the brush tufts are raised. Any faults that may occur, e.g. B. safely avoided by bumping against the floating slats.
  • the guide table is designed as an injector table, wherein an air flow is generated by the injector tube, which leads to a slight suction effect through the suction opening. This keeps the trailing edges of the sheets, which are deflected downwards, on the guide table. This is particularly advantageous for sheets made of light material.
  • the design of the guide table with upper and lower plate and an injector tube arranged therebetween enables a simple construction of the guide table designed as an injector table.
  • the air flow generated between the plates by the air emerging from the openings of the injector tube in the conveying direction leads, in addition to the slight suction effect through the suction openings, to a blowing effect through the blow gap.
  • the air from the blow gap flows in the conveying direction over the stacking table and simplifies the adjustment of the falling sheets on the stack.
  • a device according to the invention is particularly suitable for forming a structural unit with a cross cutter.
  • the distance between the knives of the cross cutter and the transport disks of the device is slightly less than the minimum arc length l min .
  • FIG. 1 shows a device according to the invention in a structural unit with a cross cutter.
  • FIG. 2 shows a section of the device according to the invention with part of the first conveying device, with the deflection device and with part of the second conveying device and the stacking device in each case.
  • the braking device can be seen in the form of a vertical section in the conveying direction and a section perpendicular through a brake band.
  • a device for shingling and depositing sheets 1 onto a stack, together with a cross cutter forms a structural unit in which an inlet device, the cross cutter and the device according to the invention are arranged one behind the other in the conveying direction.
  • the arrows A show the conveying direction and the vertical position of the conveying plane of the sheet 1.
  • the assembly is of a frame 2 with supports 3, z. B. worn from square tubes.
  • the last guide roller 4 for the incoming web 5 is shown in FIG.
  • the inlet device can, in addition to other guide rollers, a slitter and a measuring roller, e.g. B. to determine the web tension.
  • the cross cutter has a lower, fixed knife 6 and an upper, rotating knife 7.
  • the lower knife 6 is arranged on a bar 9 fastened to a carrier 8 at an acute angle to the conveying direction and extends over the width of the structural unit.
  • the cutting edge of the upper knife 7 arranged in a knife roller 10 has a slightly spiral course, so that when the knife roller 10 rotates with the lower knife 6, it divides the web 4 into sheets 1 in the manner of a scissor cut.
  • a device for shingling and depositing sheets onto a stack has a first conveyor device with suspension bars 11, transport disks 12 and pressure rollers 13, a deflection device with a brush roller 14 and a guide table 15, a second conveyor device with suspension bars 16, a braking device with braking belts 17 and one Stacking device with a stacking table 18.
  • the first conveying device and the deflecting device are arranged one behind the other in the conveying direction in front of the stacking device.
  • the floating slats 11 of the first conveying device are located below the conveying plane, their upper edges being at a short distance from the conveying plane. They extend from the lower knife 6 parallel to the conveying direction to just before the brush roller 14 of the deflection device and are arranged to be displaceable transversely to the conveying direction. Their front ends, ie the ends pointing towards the cross cutter opposite to the conveying direction, are chamfered in such a way that their upper edges protrude close to the lower knife 6.
  • the floating slats 11 are connected via flexible plastic pipes 19, a common supply duct 20, an air line 21 and a further air duct 22 to a distributor, not shown, which is connected to a fan, also not shown.
  • the transport disks 12 are located between the floating slats 11 in the region of the rear ends of the floating slats 11. They are arranged on a common shaft 23 connected to a drive so that they can be moved transversely to the conveying direction.
  • the transport disks 12 protrude 1 to 2 mm beyond the upper edges of the floating slats 11.
  • the pressure rollers 13, so-called trolleys, are located vertically above the transport disks 12. They are each pivoted transversely to the conveying direction and are pressed pneumatically onto the transport disks 12. Their diameter is approximately one third of the diameter of the transport disks 12. Transport disks 12 and pressure rollers 13 are also arranged to be displaceable transversely to the conveying direction.
  • a cam 24 consists, for example, of a narrow square plate, the upper side of which is chamfered, the tip formed by the chamfer being rounded.
  • the cams 24 are mounted so that their tips point in the conveying direction and protrude beyond the upper edge of the floating slats 11. They can have an elongated hole and can be fastened to the floating slats 11 with screws.
  • the cams 24 form elevations which are arranged at regular intervals over the conveying width and protrude somewhat beyond the conveying plane. These elevations lead to a slightly sinusoidal course of the sheets 1 transverse to the conveying direction.
  • the brush roller 14 with a guide comb 25 and the guide table 15 are arranged.
  • the brush roller 14 arranged above the conveying plane has a hollow roller 26 made of carbon fibers, to which one to five brush tufts 27, for example a row of three brush tufts 27, are attached at an axial distance of 5 to 20 mm, for example 10 mm .
  • the brush tufts 27 are arranged on the circumference of the hollow roller 26 radially at an angle of 10 to 60 °, for example approximately 40 °, corresponding area.
  • the brush tufts 27 are contained in small steel cylinders 28 with an external thread. These steel cylinders 28 are screwed into corresponding steel cylinders 29 with an internal thread embedded in the hollow roller 26.
  • the brush roller 14 is arranged so that a lower portion of a dash-dotted path curve 30 of the ends of the brush tufts 27 extends in the conveying direction behind the cams 24 arranged at the ends of the floating bars 11 below the conveying plane and close to the likewise below the conveying plane, at a distance of about 30 to 70 mm, e.g. B. 50 mm, to the conveyor level, arranged guide table 15 protrudes.
  • the brush roller 14 is connected to a servo motor.
  • the guide comb 25 has narrow, 2 to 10 mm, for example 5 mm wide, webs which are arranged in the spaces between the rows of brush tufts 27 of the brush roller 14.
  • the webs are bent approximately into a U-shape, their legs 31 above the brush roller 14 on supports 32 arranged transversely to the conveying direction, for. B. extending across the width of the unit flat iron are attached that the horizontally extending floors 33 of the U's limit the conveying plane upwards.
  • the bottoms 33 of the webs protrude at their front, rounded ends close to the cams 24 and with their rear, beveled ends close to the suspension bars 16 of the second conveyor device, the bevel of the rear ends being tangential to the path curve 30 of the ends of the brush tufts 27.
  • the guide table 15 of the deflection device extends over the width of the structural unit and in the conveying direction from the transport disks 12 to the stacking table 18. It is designed as an injector table and has, at the above-mentioned distance, an upper plate 34 arranged parallel to the conveying plane, an underneath one, lower plate 35 and an injector tube 36.
  • the lower plate 35 runs parallel to the upper plate 34 up to the vicinity of the stacking table 18.
  • the distance between the upper plate 34 and the lower plate 35 is kept constant in this area by spacers 37.
  • the lower plate 35 is bent up over its entire width to the upper plate 34 and runs a small distance at a short distance from the upper plate 34. This forms a blowing gap 38, the blowing direction of which points over the stacking table 18 in the conveying direction .
  • the upper plate 34 has suction openings 39, for example rows of holes extending over the conveying width. These rows of holes end below the rear area of the guide comb 25.
  • the injector tube 36 is fastened on the lower plate 35 transversely to the conveying direction between the upper and lower plates 34, 35. It points to its rear, ie its pointing in the conveying direction, side an axially parallel row of openings 40, z. B. holes, and is connected to a compressed air supply.
  • the lower plate 35 is fastened via a plate 41 to a carrier 42 arranged transversely to the conveying direction.
  • the guide table 15 can be swiveled downward according to arrow B via a swivel device (not shown).
  • the stacking table 18 arranged behind the guide table 15 is connected to conventional lifting and lowering devices and is provided with a rear edge stop 43 at its front end and with a front edge stop 44 at its rear end.
  • the rear edge stop 43 and the front edge stop 44 have fixed and movable parts.
  • FIG. 2 schematically shows a fixed plate 45 and a movable plate 46, also called a vibrator, of the rear edge stop 43.
  • the front edge stop 44 is arranged to be displaceable in the conveying direction, the maximum distance between the rear edge stop 43 and the front edge stop 44 corresponding to the maximum arc length l max and the corresponding minimum distance to the minimum arc length l min .
  • the floating slats 16 of the second conveying device are located above the conveying plane, their lower edges being at a short distance from the conveying plane. They extend parallel to the conveying direction, starting from the guide comb 25 over the rear part of the guide table 15, beyond the stacking table 18 and beyond the stacking table 18. They are also arranged to be displaceable transversely to the conveying direction.
  • the front ends of the floating slats 16 are beveled in accordance with the course of the webs of the guide comb 25, so that their lower edges protrude closely to the path curve 30 of the ends of the brush tufts 37.
  • the floating slats 16 no longer have any nozzle openings. Approximately in the middle of the rest of the area with nozzle openings, the floating slats 16 are divided by partition walls 47 into a front and a rear section. In each section, the floating slats 16 are connected to the distributor to which the floating slats 11 of the first conveyor device are connected via flexible plastic tubes 48, a common air duct 49 and an air line 50. The plastic tubes 48, the common air duct 49 and the air line 50 of the rear section are arranged in the area outside the stacking table 18.
  • the braking device has a common drive shaft 51 arranged transversely to the conveying direction, a carrier 52, a drive motor 53 and two rails 54.
  • the brake bands 17 are arranged in some of the spaces between the floating strips 16, for example in every second to fifth space.
  • the brake bands 17 arranged between two floating slats 16 are each guided around three rollers 55, 56 and 57 with axes arranged transversely to the conveying direction.
  • the rollers 55 and 56 are each arranged one behind the other in the conveying direction, their horizontal position being oriented such that the undersides of the brake bands 17 in the sections between the rollers 55, 56 limit the conveying plane upwards.
  • the third rollers 57 are located above the floating slats 16. They are designed as drive rollers and fastened on the common drive shaft 51.
  • the drive motor 53 to be operated at different speeds is on the carrier 52 which is also arranged transversely to the conveying direction, for. B. a square tube, and is connected via a projecting through an opening in the carrier 52 gear 58 with bevel gears to the drive shaft 51.
  • the carrier 52 is guided at its lateral ends on the two rails 54 running parallel to the conveying direction and to a drive, not shown, for. B. connected to a manually operated spindle drive.
  • the rails 54 extend along the stacking table 18 at the lateral edges of the assembly.
  • the brake bands 17 are designed as suction bands. They have openings 59 arranged uniformly, the free area through the area of the openings 59 being a quarter to half the area of the brake bands 17.
  • the openings 59 are, for example, round and have a diameter of, for. B. 5 mm.
  • the brake bands 17 have an adhesive, for. B. rubberized, surface on. Its width is z. B. 25 mm.
  • suction boxes 60 The spaces inside the endless brake bands 17, which are guided around the rollers 55, 56, 57, are largely filled by suction boxes 60, the width of which approximately corresponds to the width of the brake bands 17.
  • the suction boxes 60 are via air lines, not shown, for. B. laterally on the suction boxes 60 above the floating slats 16 arranged connecting piece, flexible plastic pipes, a common suction channel and a suction line, connected to another, also not shown, fan.
  • the suction boxes 60 are arranged such that the brake bands 17 lie against the floors 61 of the suction boxes 60 between the rollers 55 and 56.
  • the bottoms 61 have elongated, offset slots 62.
  • the width of the slots 62 is for example 5 mm, their length z. B. 20 mm.
  • the free area through the slots 62 is one third to two thirds of the area of the bottom 61.
  • the drive rollers 57 of the brake bands 17 are each fixed in a rotationally fixed manner via a screw 63 and a fitting element 64 on a hollow shaft 65 which is designed as an internal polygon and is arranged on the drive shaft 51.
  • the drive shaft 51 is accordingly designed as an external polygon.
  • the braking device has a holder 66 for each brake band 17, which is connected to the rollers 55, 56, 57 and the suction box 60.
  • the bracket 66 is, for. B. positioned by means of brackets supported on the carrier 52.
  • the hollow shaft 65 protrudes from the roller 57 on both sides, is surrounded in these areas by narrow hollow cylinders of the holder 66 and is connected to the latter via bearings 67.
  • the holder 66 also has two plates running parallel to the conveying direction from the sides of the roller 57 to the sides of the roller 55, to which the suction box 60 arranged between the plates and a shaft 68 of the roller 55 are fastened.
  • the plates of the holder 66 can also be designed as side plates of the suction box 60.
  • a shaft 69 of the roller 56 is connected to the holder 66 via a holder 71 arranged below the roller 57 between the plates.
  • the holder is arranged on a shaft parallel to the shaft 69 and fastened to the plates of the holder 66.
  • the holder 71 has a threaded rod 73 arranged perpendicular to the shafts 69, 72 in a threaded bore.
  • the threaded rod 73 is supported outside of the holder 71 on a housing wall 75 of the suction box 60.
  • the respective brake band 17 can be tensioned by unscrewing the threaded rod 73.
  • the hollow shaft 65 is slidably arranged on the drive shaft 51 and is positioned on the drive shaft 51 by side clamping disks 75.
  • the brake bands 17 are also arranged to be displaceable transversely to the conveying direction.
  • the carriers 8, 42 and the supply duct 20, the air duct 22 and the two air ducts 49 extend across the width of the structural unit and are fastened to the frame 2.
  • she consist of square tubes, for example.
  • Inlet device, cross cutter and device according to the invention each have a housing 76, 77, 78, the housing of the cross cutter being a soundproofing housing surrounding the cutter block 10.
  • the distance between the lower knife 6 and the transport disks 12, ie the distance between the cutting edge of the lower knife 6 and the line of contact between the transport rollers 12 and pressure rollers 13, is somewhat smaller than the minimum arc length l min .
  • the distance between the transport disks 12 and the brake bands 17 arranged in the foremost position is somewhat larger than the minimum arc length l min and the distance between the transport disks 12 and the rear edge stop 43 of the stacking table 18 is somewhat larger than the distance between the two lower rollers 55, 56 of the brake bands 17
  • the length of the guide table 15 corresponds to the distance between the two lower rollers 55, 56 of the brake bands 17, ie the length of the brake bands 17 in the conveying direction.
  • the ratio of the length of the brake bands 17 in the conveying direction and the maximum arc lengths l max is 0.04 to 0.3, in particular 0.1 to 0.25.
  • the maximum arc length l max can, for example, be 1,100 mm, the minimum arc length l min, for example 580 mm, the conveying width approximately 1,500 mm and the length of the brake bands 17 in the conveying direction 200 mm.
  • the web 4 delivered at the production speed via the infeed device is cut to the predetermined arc length by the cross cutter.
  • the front edge of the web 4 is conveyed through the floating slats 11 of the first conveying device on an air cushion to the transport disks 12 and the pressure rollers 13. Since the distance between the lower knife 6 and the transport disks 12 is smaller than the minimum arc length l min , the web 4 is gripped by the transport disks 12 and the pressure rollers 13 before the cut.
  • the transport disks 12 are driven at a peripheral speed, hereinafter referred to as the conveying speed, which is 1 to 2% greater than the production speed.
  • the conveying speed which is 1 to 2% greater than the production speed.
  • first sheet 1 leaves the floating slats 11, it is gripped by the brush tufts 27 of the brush roller 14 accelerated with the aid of the servo motor.
  • the circumferential speed of the brush roller 14 corresponds to the conveying speed at this moment, so that the rear edge of the first sheet 1 is deflected downwards onto the guide table 15 by briefly touching the brush tufts 27 from the conveying plane. Then we brake the brush roller 14 again, only to deflect the following sheet 1, i.e. H. depending on the respective arc length, which also determines the cutting frequency of the upper knife 7, to be accelerated again.
  • the compressed air exiting through the injector tube 36 creates an air flow between the upper and lower plates 34, 35 in the conveying direction and thus in the suction openings 39 of the upper plate of the guide table 15, a suction effect by which the deflected rear edge of the first sheet 1 is held on the guide table 15 .
  • the rear edge of the first sheet 1 is deflected, its front edge reaches the brake bands 17 arranged between the upper floating bars 16. The sheet 1 is braked to the braking speed.
  • the brake bands 17 designed as suction bands run over the suction boxes 60, as a result of which the front edges of the sheets 1 adhere securely to the brake bands 17, without leaving marks on the sheet 1.
  • the leading edge of the following sheet 1 arriving at the conveying speed is also conveyed in the case of upright brush tufts 27 of the brush roller 14 along the guide comb 25 to the floating slats 16 of the second conveying device and from there via the stacking table 18 to the brake belts 17. Since the first sheet 1 is meanwhile moved with the trailing edge deflected downward and guided on the guide table 15 at braking speed, the leading edge of the second sheet 1 overlaps the trailing edge of the first sheet 1 and reaches the gap between the floating slats 16 and the first sheet 1.
  • the rear edge of the second sheet 1 leaves the floating slats 11, it is likewise deflected by the brush tufts 27 of the brush roller 14 onto the guide table 15 which is again free in the initial area.
  • the front edge reaches the brake bands 17 as soon as the rear edge is deflected.
  • the second sheet 1 is also braked to braking speed. Its front edge adheres to the brake bands 17 before that of the first sheet 1.
  • the first and second, overlapped sheets 1 are conveyed at braking speed to the rear end of the stacking device.
  • the first sheet 1 is stopped at the front edge stop 44 of the stacking table 18, peeled off from the braking band 17 by the following, second sheet 1 and then falls onto the stack.
  • the degree of overlap of sheets 1 is greater the lower the ratio between braking speed and conveying speed. So that the degree of overlap is so great that at least two sheets 1 are braked simultaneously on the brake bands 17, the length of the brake bands 17 is matched to the maximum sheet length l max .
  • the ratio of the two sizes is at least twice as large as twice the desired ratio of braking speed and conveying speed.
  • the braking speed is 2 to 15%, in particular 3 to 10%, of the production speed. Since the conveying speed is only slightly higher than the production speed, these areas also apply to the relationship between braking speed and conveying speed.
  • the production speeds are 100 to 600 m / min.
  • the air pressure applied to the floating strips 11, 16 is approximately 30 to 60 mbar
  • the suction pressure applied to the suction boxes 60 of the brake bands 17 is approximately 30 to 65 mbar
  • the air pressure applied to the injector tube 36 of the guide table is 0.5 to 2 mbar.
  • sheets of embossed paper with a basis weight of 70 g / m 2 , a sheet length of about 1,000 mm and a width of about 850 mm can be tight with a production speed of 400 m / min and a braking speed of 16 m / min without the risk of imprints shingled and with high stacking accuracy be filed.
  • About five sheets 1 are braked simultaneously on the brake bands 17.
  • the brake bands 17 are brought into the position corresponding to the other arc length by moving the carrier 52 on the rails 54.
  • sheets 1 of different sheet lengths can therefore first be shingled and deposited.
  • the width of the sheets 1 can vary due to the floating slats 11, transport disks 12, pressure rollers 13, floating slats 16 and brake bands 17 arranged transversely to the conveying direction.
  • the suction air applied to the brake bands 17 designed as suction bands, or various brush tufts 27 or other deflecting elements that can be screwed into the hollow roller 26 of the brush roller 14 sheets can be scaled and deposited from a wide variety of materials.
  • a device according to the invention is particularly suitable for flaking and depositing sheets of paper, even of very thin paper, in particular in the production of labels or securities. It is also used for packaging material or for foils, e.g. B. suitable for films. Sheets of a material with basis weights of 30 g / m 2 to 800 g / m 2 can be deposited.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)

Abstract

There are known devices for stream feeding of sheets onto a stack, the braking devices of which have a braking gap or clamping elements. With these devices there is a danger of impressions on the sheets. There are also known devices whose braking devices have suction rollers or suction rails. However, these devices are suited only to sheets of one sheet length. The device as per the invention is designed so that sheets of differing lengths can be delivered as well. The braking device of the device as per the invention has braking belts (17) that are movably arranged between suspension rails (16) in the back region of a stacking device. A device as per the invention makes stream feeding of sheets of various sheet lengths possible without danger of impressions.

Description

Die Erfindung betrifft eine Vorrichtung zum Schuppen und Ablegen von Bogen auf einen Stapel gemäß dem Oberbegriff des Anspruchs 1. Dabei werden die hintereinander angelieferten Bogen mit der ersten und der zweiten Förderrichtung über die Stapelvorrichtung gefördert. Sobald die Hinterkante eines Bogens die Ablenkvorrichtung erreicht hat, wird sie aus der Förderebene nach unten abgelenkt. Anschließend wird der Bogen durch die Bremsvorrichtung abgebremst, so daß die Vorderkante des folgenden Bogens über die Hinterkante des ersten Bogens gefördert wird. Die so geschuppten Bogen werden auf der Stapelvorrichtung abgelegt.The invention relates to a device for flaking and depositing sheets on a stack according to the preamble of claim 1. The sheets delivered one behind the other are conveyed with the first and the second conveying direction via the stacking device. As soon as the rear edge of a sheet has reached the deflection device, it is deflected downward from the conveying plane. The sheet is then braked by the braking device, so that the leading edge of the following sheet is conveyed over the trailing edge of the first sheet. The sheets scaled in this way are deposited on the stacking device.

Vorrichtungen zum Schuppen und Ablegen von Bogen auf einen Stapel werden beispielsweise hinter einem Querschneider, aber auch hinter Bogendruckmaschinen eingesetzt.Devices for shingling and depositing sheets on a stack are used, for example, behind a cross cutter, but also behind sheet printing machines.

Eine Vorrichtung, mit der Bogen unterschiedlicher Länge abgelegt werden können, ist aus der DE-OS 38 12 685 bekannt. Bei dieser Verzögerungsvorrichtung für Bogenlagen werden hintereinander angeordnete Bogen bzw. Bogenlagen mit Zufuhrgeschwindigkeit einem langsamer laufenden Förderer so zugeführt, daß sie überlappen. Dieser leicht geschuppte Lagenstrom durchläuft einen Bremsspalt, durch den die Schuppung verstärkt wird. Der Bremsspalt wird durch ein oberhalb und unterhalb des Förderers in Förderrichtung verschiebbares Bremsorgan gebildet.A device with which sheets of different lengths can be deposited is known from DE-OS 38 12 685. In this retarding device for sheet layers, sheets or sheet layers arranged one behind the other are fed at a feed speed to a slower-running conveyor so that they overlap. This slightly scaled layer flow passes through a brake gap, which increases the scaling. The brake gap is formed by a braking element which can be displaced in the conveying direction above and below the conveyor.

Der Nachteil dieser Vorrichtung ist, daß in einem Bremsspalt durch den auf sehr kurzer Strecke aufgebrachten Druck die Gefahr von Abdrücken auf den Bogen besonders groß ist. Gerade bei empfindlichen Materialien, z. B. Etiketten, sind derartige Abdrücke kaum zu vermeiden. Zusätzlich führen die Förderer selbst mit unteren und oberen Förderbändern leicht zu Abdrücken. Verzögerungsvorrichtung mit Förderbändern sind außerdem aufwendig herzustellen und haben durch ihre große Erstreckung in Förderrichtung einen großen Platzbedarf.The disadvantage of this device is that the risk of imprints on the sheet is particularly great in a brake gap due to the pressure applied over a very short distance. Especially with sensitive materials, e.g. B. labels, such imprints can hardly be avoided. In addition, the conveyors easily lead to impressions even with lower and upper conveyor belts. Delay devices with conveyor belts are also complicated to manufacture and have a large space requirement due to their large extent in the conveying direction.

Eine weitere Vorrichtung mit Förderbändern ist aus der DE-OS 41 19 511 bekannt. Diese Vorrichtung weist zum Bremsen der Bogen Klemmelemente auf, die ebenfalls zu Abdrücken, insbesondere bei empfindlichen Materialien, führen.Another device with conveyor belts is known from DE-OS 41 19 511. This device has clamping elements for braking the sheet, which likewise lead to impressions, especially in the case of sensitive materials.

Aus der DE-PS 23 48 320, der DE-PS 25 32 880, der DE-PS 26 15 864 und der DE-PS 28 41 658 sind Vorrichtungen zum Schuppen und Ablegen von Bogen auf einen Stapel bekannt, bei denen zum Fördern der Bogen Schwebeleisten eingesetzt werden.DE-PS 23 48 320, DE-PS 25 32 880, DE-PS 26 15 864 and DE-PS 28 41 658 devices for shedding and depositing sheets on a stack are known in which to promote Bow floating slats are used.

Mit Hilfe von Schwebeleisten werden die Bogen auf einem Luftpolster ohne Gefahr von Abdrücken gefördert. Auch bei ihren Bremsvorrichtungen, Saugwalzen oder Saugleisten, besteht im Vergleich zu einem Bremsspalt oder Klemmelementen eine wesentlich geringere Gefahr von Abdrücken. Diese Vorrichtungen sind auch wesentlich kompakter aufgebaut als die Vorrichtungen mit Förderbändern. Sie haben jedoch den Nachteil, daß sie nur für einen Bogenlänge eingesetzt werden können.With the help of floating slats, the sheets are conveyed on an air cushion without the risk of imprints. Even with their braking devices, suction rollers or suction strips, there is a significantly lower risk of imprints compared to a brake gap or clamping elements. These devices are also much more compact than the devices with conveyor belts. However, they have the disadvantage that they can only be used for one arc length.

Bei der in der DE-PS 28 41 658 beschriebenen, gattungsbildenden Vorrichtung ist die Bremsvorrichtung als schwenkbare Saugleiste ausgebildet, wobei der Antrieb eines Ablenkorganes der Ablenkvorrichtung mit dem Antrieb der Saugleiste synchronisiert ist. Diese Vorrichtung ist nur für lange Bogen gleicher Bogenlänge geeignet. Eine eventuelles Umrüsten der Antriebe für eine veränderte Bogenlänge ist aufwendig, wenn nicht sogar unmöglich. Außerdem ist es mit diesen Antrieben nicht möglich, die Saugleiste schnell wieder in ihre Ausgangsposition zu bringen, um mit sehr hoher Geschwindigkeit angeförderte, kurze Bogen abzubremsen.In the generic device described in DE-PS 28 41 658, the braking device is designed as a pivotable suction bar, the drive of a deflection element of the deflection device being synchronized with the drive of the suction bar. This device is only suitable for long sheets of the same sheet length. A possible retrofitting of the drives for a changed arc length is complex, if not impossible. In addition, it is not possible with these drives to quickly bring the suction bar back into its starting position in order to brake short sheets conveyed at a very high speed.

Aufgabe der Erfindung ist es eine Vorrichtung zum Schuppen und Ablegen von Bogen auf einen Stapel gemäß dem Oberbegriff des Anspruchs 1 zu entwickeln, mit der Bogen unterschiedlicher Bogenlänge, auch aus empfindlichen Material, möglichst ohne Abdrücke abgelegt werden können. Außerdem soll die Vorrichtung kompakt aufgebaut sein.The object of the invention is to develop a device for shingling and depositing sheets on a stack according to the preamble of claim 1, with which sheets of different sheet lengths, even of sensitive material, can be deposited without any imprints. In addition, the device should be compact.

Mit einer erfindungsgemäßen Vorrichtung können Bogen unterschiedlicher Bogenlänge geschuppt und abgelegt werden. Dabei kann die Bogenlänge zwischen einer minimalen Bogenlänge lmin und einer maximalen Bogenlänge lmax variiert werden.With a device according to the invention, sheets of different sheet lengths can be shingled and deposited. The arc length can be varied between a minimum arc length l min and a maximum arc length l max .

Durch die Anordnung der Bremsbänder der Bremsvorrichtung im hinteren Bereich der Stapelvorrichtung, d. h. im Bereich oberhalb der Vorderkanten der abgelegten Bogen, wirkt die Bremsvorrichtung der erfindungsgemäßen Vorrichtung auf die Vorderkanten der Bogen ein. Die angelieferten Bogen werden an ihren Vorderkanten durch die Schwebeleisten der zweiten Fördervorrichtung bis zu den Bremsbändern gefördert, durch diese abgebremst und abgelegt.By arranging the brake bands of the braking device in the rear area of the stacking device, i. H. in the area above the leading edges of the deposited sheets, the braking device of the device according to the invention acts on the leading edges of the sheets. The delivered sheets are conveyed on their leading edges through the floating bars of the second conveyor device to the brake bands, braked and put down by these.

Die Bremsbänder weisen Mittel auf, z. B. eine Oberfläche mit hohem Reibungswiderstand, die dazu führen, daß die Vorderkanten der Bogen an ihnen haften. Außerdem sind sie über eine bestimmte Strecke in der Förderebene geführt. Durch das Anhaften der Vorderkanten der Bogen an den Bremsbändern und eine größere Strecke zum Abbremsen können die Bogen ohne Gefahr von Abdrücken abgebremst, dicht geschuppt und durch das Führen der Bogen oberhalb des Stapels mit hoher Stapelgenauigkeit abgelegt werden.The brake bands have means, e.g. B. a surface with high friction resistance, which cause the leading edges of the sheets to adhere to them. In addition, they are guided over a certain distance in the conveyor level. By sticking the leading edges of the sheets to the brake bands and a greater distance for braking, the sheets can be braked tightly without the risk of imprints shingled and stored by guiding the sheets above the stack with high stacking accuracy.

Eine variable Bogenlänge wird dabei dadurch erreicht, daß die Bremsbänder zwischen den Schwebeleisten der zweiten Fördervorrichtung verschiebbar angeordnet sind; und zwar im hinteren Bereich der Stapelvorrichtung, der sich von einem Bereich oberhalb der Vorderkante der abgelegten Bogen minimaler Bogenlänge lmin bis zur Vorderkante der abgelegten Bogen maximaler Bogenlänge lmax erstreckt. Da die Schwebeleisten über die gesamte Stapelvorrichtung verlaufen, können die Vorderkanten der Bogen bei jeder der den unterschiedlichen Bogenlängen entsprechenden Lage der Bremsbänder durch die Schwebeleisten bis zu den Bremsbändern gefördert werden.A variable arc length is achieved in that the brake bands are slidably arranged between the floating bars of the second conveyor; specifically in the rear area of the stacking device, which extends from an area above the front edge of the deposited sheets of minimum sheet length l min to the front edge of the deposited sheets of maximum sheet length l max . Since the floating slats run over the entire stacking device, the leading edges of the sheets can be conveyed through the floating slats to the braking tapes in any position of the brake bands corresponding to the different sheet lengths.

Die Bremsvorrichtung der erfindungsgemäßen Vorrichtung mit Bremsbändern, die

  • im hinteren Bereich der Stapelvorrichtung
  • zwischen den Schwebeleisten der zweiten Fördervorrichtung
  • verschiebbar angeordnet sind,
ermöglicht daher die Ablage von Bogen variabler Bogenlänge ohne Gefahr von Abdrücken. Sie führt außerdem zu einer sehr kompakten Bauweise der erfindungsgemäßen Vorrichtung.The braking device of the device according to the invention with brake bands
  • in the rear area of the stacking device
  • between the floating slats of the second conveyor
  • are slidably arranged,
therefore enables the storage of sheets of variable sheet length without the risk of imprints. It also leads to a very compact design of the device according to the invention.

Durch die gemeinsame Antriebswelle gemäß Anspruch 2 wird für die Bremsbänder nur ein Antrieb benötigt. Eine gemeinsame Antriebswelle ermöglicht außerdem eine gemeinsame Verschiebbarkeit der Bremsbänder mit geringerem Herstellungsaufwand und geringerem Umrüstungsaufwand. Die Bremsbänder können beispielsweise über Rollen geführt werden, wobei jeweils eine als Antriebsrolle ausgebildete Rolle auf der Antriebswelle befestigt ist und die Antriebswelle mit einem in Förderrichtung verschiebbaren Träger verbunden ist.Due to the common drive shaft according to claim 2, only one drive is required for the brake bands. A common drive shaft also enables the brake bands to be moved together with less manufacturing effort and less retrofitting. The brake bands can, for example, be guided over rollers, in each case one roller designed as a drive roller being fastened to the drive shaft and the drive shaft being connected to a carrier which can be displaced in the conveying direction.

Durch die Ausbildung der Bremsbänder als Saugbänder gemäß Anspruch 3 haften die Bogen sicher an den Bremsbändern ohne Gefahr von Abdrücken.By designing the brake bands as suction bands according to claim 3, the sheets adhere securely to the brake bands without the risk of leaving marks.

Die in Anspruch 4 beschriebenen Schwebeleisten der ersten Fördervorrichtung ermöglichen eine Förderung der Bogen auf einem Luftpolster und die Transportscheiben mit Andrückrollen eine Beschleunigung der Bogen, so daß zwischen den Bogen eine zum Schuppen benötigte Lücke entsteht. Dabei sind die Transportscheiben, Andrückrollen und Bremsbänder so angeordnet, daß der Abstand zwischen den Transportscheiben und den in vorderster Stellung angeordneten Bremsbändern etwas größer ist als die minimale Bogenlänge lmin und der Abstand zwischen den Transportscheiben und der Stapelvorrichtung etwas größer ist als die Länge der Bremsbänder in Förderrichtung. Die Anordnung der Transportscheiben zwischen den Schwebeleisten führt zu einer kompakteren Bauweise als beispielsweise die Anordnung einer in der DE-PS 28 41 658 beschriebenen Saugförderwalze hinter den Schwebeleisten.The floating slats of the first conveying device described in claim 4 enable the sheets to be conveyed on an air cushion and the transport disks with pressure rollers accelerate the sheets, so that a gap is needed between the sheets for the shed. The transport discs, pressure rollers and brake bands are arranged so that the distance between the transport discs and the brake bands arranged in the foremost position is slightly larger than the minimum arc length l min and the distance between the transport discs and the stacking device is slightly larger than the length of the brake bands in the conveying direction. The arrangement of the transport disks between the suspension rails leads to a more compact design than, for example, the arrangement of a suction conveyor roller described in DE-PS 28 41 658 behind the suspension rails.

Die in Anspruch 5 beschriebenen Nocken an den hinteren Enden der Schwebeleisten führen zu einem leicht sinusförmigen Verlauf der Bogen quer zur Förderrichtung. Dadurch werden die Bogen, insbesondere solche aus leichtem Material oder solche, die, z. B. wie Etiketten, durch eine Prägung eine sehr geringe Eigensteifigkeit aufweisen, stabilisiert. Diese Stabilisierung der Bogen, vor allem ihrer Vorderkanten, ermöglicht eine unproblematische Bogenführung, auch während die Vorderkanten die Transportwalzen verlassen und zu den oberen Schwebeleisten der zweiten Fördervorrichtung gefördert werden.The cams described in claim 5 at the rear ends of the floating ledges lead to a slightly sinusoidal course of the sheets transverse to the conveying direction. As a result, the sheet, in particular those made of light material or those which, for. B. like labels, have a very low intrinsic stiffness by embossing, stabilized. This stabilization of the sheets, especially their leading edges, enables unproblematic sheet guidance, even while the leading edges leave the transport rollers and are conveyed to the upper suspension bars of the second conveying device.

Eine Ablenkvorrichtung einer erfindungsgemäßen Vorrichtung mit einer Bürstenwalze und einem Führungstisch gemäß Anspruch 6 hat den Vorteil eines einfachen Aufbaus. Mit Hilfe der Bürstenwalze werden die Hinterkanten der Bogen auf den Führungstisch abgelenkt und während des Abbremsens der Bogen über den Führungstisch zur Stapelvorrichtung geführt. Der Führungstisch kann, insbesondere in seinem vorderen Bereich, Mittel zum Halten der Bogenhinterkanten auf dem Führungstisch aufweisen. Diese Mittel, beispielsweise eine leicht rauhe Oberfläche, dürfen nur eine leichte Haftwirkung aufweisen, so daß sie die Führung der Hinterkanten über den Führungstisches nicht behindern. Die Bürstenwalze ist mit einem separaten, mit variabler Geschwindigkeit zu betreibenden Motor, z. B. einem Servomotor, verbunden. Dadurch können Bogen unterschiedlicher Bogenlänge abgelenkt werden. Dabei wird die Bürstenwalze in einem der Bogenlänge entsprechenden Zeittakt zum Ablenken der Bogen auf Fördergeschwindigkeit beschleunigt, anschließend abgebremst und erst zum Ablenken des nächsten Bogens wieder beschleunigt.A deflection device of a device according to the invention with a brush roller and a guide table according to claim 6 has the advantage of a simple structure. With the help of the brush roller, the trailing edges of the sheets are deflected onto the guide table and, during braking, the sheets are guided over the guide table to the stacking device. The guide table, particularly in its front area, can have means for holding the trailing edges of the sheet on the guide table. These agents, for example a slightly rough surface, may only have a slight adhesive effect, so that they do not hinder the guidance of the trailing edges over the guide table. The brush roller is equipped with a separate, variable-speed motor, e.g. B. a servo motor. As a result, sheets of different sheet lengths can be deflected. The brush roller is accelerated to the conveying speed in a time cycle corresponding to the length of the sheet, then decelerated and only accelerated again to deflect the next sheet.

Beträgt die Länge des Führungstisches gemäß Anspruch 7 in etwa der Länge der Bremsbänder in Förderrichtung, so werden die Bogen abgebremst, sobald ihre Hinterkanten nach unten abgelenkt sind.If the length of the guide table is approximately the length of the brake bands in the conveying direction, the sheets are braked as soon as their rear edges are deflected downward.

Die Bürstenwalze weist gemäß Anspruch 8 eine Hohlwalze aus Kohlefasern auf. Dadurch hat die Bürstenwalze ein geringes Trägheitsmoment und ist problemlos auf unterschiedliche Geschwindigkeiten zu beschleunigen und abzubremsen.The brush roller has a hollow roller made of carbon fibers. As a result, the brush roller has a low moment of inertia and can be easily accelerated and braked to different speeds.

Durch die Stege des Führungskammes gemäß Anspruch 9 werden die Vorderkanten der Bogen bei hochstehenden Bürstenbüscheln sicher zu den Schwebeleisten der zweiten Förderrichtung geführt. Dadurch werden eventuell auftretende Störungen, z. B. durch an die Schwebeleisten gestoßene Bogen, sicher vermieden.Due to the webs of the guide comb according to claim 9, the leading edges of the sheets are securely guided to the floating strips of the second conveying direction when the brush tufts are raised. Any faults that may occur, e.g. B. safely avoided by bumping against the floating slats.

Gemäß Anspruch 10 ist der Führungstisch als Injektortisch ausgebildet, wobei durch das Injektorrohr eine Luftströmung erzeugt wird, die zu einer leichten Saugwirkung durch die Saugöffnung führt. Dadurch werden die geraden nach unten abgelenkten Hinterkanten der Bogen auf dem Führungstisch gehalten, Dies ist besonders bei Bogen aus leichtem Material von Vorteil.According to claim 10, the guide table is designed as an injector table, wherein an air flow is generated by the injector tube, which leads to a slight suction effect through the suction opening. This keeps the trailing edges of the sheets, which are deflected downwards, on the guide table. This is particularly advantageous for sheets made of light material.

Die Ausbildung des Führungstisches mit oberer und unterer Platte sowie dazwischen angeordnetem Injektorrohr gemäß Anspruch 11 ermöglicht einen einfachen Aufbau des als Injektortisches ausgebildeten Führungstisches. Die zwischen den Platten durch die aus den Öffnungen des Injektorrohres in Förderrichtung austretende Luft erzeugte Luftströmung führt neben der leichten Saugwirkung durch die Saugöffnungen zu einer Blaswirkung durch den Blasspalt. Die Luft aus dem Blasspalt strömt in Förderrichtung über den Stapeltisch und vereinfacht das Justieren der herabfallenden Bogen auf den Stapel. Mit diesem einfachen Aufbau des Führungstisches kann sowohl das Schuppen der Bogen als auch das Ablegen der Bogen auf den Stapel verbessert werden.The design of the guide table with upper and lower plate and an injector tube arranged therebetween enables a simple construction of the guide table designed as an injector table. The air flow generated between the plates by the air emerging from the openings of the injector tube in the conveying direction leads, in addition to the slight suction effect through the suction openings, to a blowing effect through the blow gap. The air from the blow gap flows in the conveying direction over the stacking table and simplifies the adjustment of the falling sheets on the stack. With this simple construction of the guide table, both the shedding of the sheets and the placing of the sheets on the stack can be improved.

Eine erfindungsgemäße Vorrichtung ist besonders dazu geeignet, eine Baueinheit mit einem Querschneider zu bilden. Dabei beträgt der Abstand zwischen den Messern des Querschneiders und den Transportscheiben der Vorrichtung etwas weniger als die minimale Bogenlänge lmin.A device according to the invention is particularly suitable for forming a structural unit with a cross cutter. The distance between the knives of the cross cutter and the transport disks of the device is slightly less than the minimum arc length l min .

Die Erfindung soll anhand eines in der Zeichnung schematisch dargestellten Beispiels weiter erläutert werden.The invention will be further explained with the aid of an example shown schematically in the drawing.

Figur 1 zeigt eine erfindungsgemäße Vorrichtung in einer Baueinheit mit einem Querschneider. In Figur 2 ist ein Ausschnitt der erfindungsgemäßen Vorrichtung mit einem Teil der ersten Fördervorrichtung, mit der Ablenkvorrichtung und mit jeweils einem Teil der zweiten Fördervorrichtung und der Stapelvorrichtung dargestellt. In den Figuren 3 und 4 ist die Bremsvorrichtung in Form eines vertikalen Schnittes in Förderrichtung und eines Schnittes senkrecht durch ein Bremsband zu sehen.Figure 1 shows a device according to the invention in a structural unit with a cross cutter. FIG. 2 shows a section of the device according to the invention with part of the first conveying device, with the deflection device and with part of the second conveying device and the stacking device in each case. In Figures 3 and 4, the braking device can be seen in the form of a vertical section in the conveying direction and a section perpendicular through a brake band.

Eine Vorrichtung zum Schuppen und Ablegen von Bogen 1 auf einen Stapel bildet zusammen mit einem Querschneider eine Baueinheit, in der eine Einlaufvorrichtung, der Querschneider und die erfindungsgemäße Vorrichtung in Förderrichtung hintereinander angeordnet sind. Die Pfeile A zeigen die Förderrichtung und die vertikale Lage der Förderebene der Bogen 1.A device for shingling and depositing sheets 1 onto a stack, together with a cross cutter, forms a structural unit in which an inlet device, the cross cutter and the device according to the invention are arranged one behind the other in the conveying direction. The arrows A show the conveying direction and the vertical position of the conveying plane of the sheet 1.

Die Baueinheit wird von einem Rahmen 2 mit Stützen 3, z. B. aus Vierkantrohren, getragen. Von der Einlaufvorrichtung ist in Figur 1 die letzte Führungswalze 4 für die ankommende Bahn 5 dargestellt. Die Einlaufvorrichtung kann neben weiteren Führungswalzen einen Längsschneider und eine Meßwalze, z. B. zur Ermittlung der Bahnspannung, aufweisen.The assembly is of a frame 2 with supports 3, z. B. worn from square tubes. The last guide roller 4 for the incoming web 5 is shown in FIG. The inlet device can, in addition to other guide rollers, a slitter and a measuring roller, e.g. B. to determine the web tension.

Der Querschneider weist ein unteres, feststehendes Messer 6 und ein oberes, rotierendes Messer 7 auf. Das untere Messer 6 ist auf einer an einem Träger 8 befestigten Leiste 9 in einem spitzen Winkel zur Förderrichtung angeordnet und erstreckt sich über die Breite der Baueinheit. Die Schneide des in einer Messerwalze 10 angeordneten, oberen Messers 7 hat einen leicht spiralförmigen Verlauf, so daß sie bei Rotation der Messerwalze 10 mit dem unteren Messer 6 die Bahn 4 abwälzend nach Art eines Scherenschnitts in Bogen 1 zerteilt.The cross cutter has a lower, fixed knife 6 and an upper, rotating knife 7. The lower knife 6 is arranged on a bar 9 fastened to a carrier 8 at an acute angle to the conveying direction and extends over the width of the structural unit. The cutting edge of the upper knife 7 arranged in a knife roller 10 has a slightly spiral course, so that when the knife roller 10 rotates with the lower knife 6, it divides the web 4 into sheets 1 in the manner of a scissor cut.

Eine Vorrichtung zum Schuppen und Ablegen von Bogen auf einen Stapel weist eine erste Fördervorrichtung mit Schwebeleisten 11, Transportscheiben 12 und Andrückrollen 13, eine Ablenkvorrichtung mit einer Bürstenwalze 14 und einem Führungstisch 15, eine zweite Fördervorrichtung mit Schwebeleisten 16, eine Bremsvorrichtung mit Bremsbändern 17 und eine Stapelvorrichtung mit einem Stapeltisch 18 auf. Dabei sind die erste Fördervorrichtung und die Ablenkvorrichtung in Förderrichtung hintereinander vor der Stapelvorrichtung angeordnet.A device for shingling and depositing sheets onto a stack has a first conveyor device with suspension bars 11, transport disks 12 and pressure rollers 13, a deflection device with a brush roller 14 and a guide table 15, a second conveyor device with suspension bars 16, a braking device with braking belts 17 and one Stacking device with a stacking table 18. The first conveying device and the deflecting device are arranged one behind the other in the conveying direction in front of the stacking device.

Die Schwebeleisten 11 der ersten Fördervorrichtung befinden sich unterhalb der Förderebene, wobei ihre Oberkanten einen geringen Abstand zur Förderebene aufweisen. Sie erstrecken sich ausgehend vom unteren Messer 6 parallel zur Förderrichtung bis kurz vor die Bürstenwalze 14 der Ablenkvorrichtung und sind quer zur Förderrichtung verschiebbar angeordnet. Ihre vorderen Enden, d. h. die entgegen der Förderrichtung zum Querschneider weisenden Enden, sind so abgeschrägt, daß ihre Oberkanten dicht an das untere Messer 6 heranragen. Die Schwebeleisten 11 sind über flexible Kunststoffrohre 19, einen gemeinsamen Zufuhrkanal 20, eine Luftleitung 21 und einen weiteren Luftkanal 22 an einem nicht dargestellten Verteiler, der mit einem ebenfalls nicht dargestellten Ventilator verbunden ist, angeschlossen.The floating slats 11 of the first conveying device are located below the conveying plane, their upper edges being at a short distance from the conveying plane. They extend from the lower knife 6 parallel to the conveying direction to just before the brush roller 14 of the deflection device and are arranged to be displaceable transversely to the conveying direction. Their front ends, ie the ends pointing towards the cross cutter opposite to the conveying direction, are chamfered in such a way that their upper edges protrude close to the lower knife 6. The floating slats 11 are connected via flexible plastic pipes 19, a common supply duct 20, an air line 21 and a further air duct 22 to a distributor, not shown, which is connected to a fan, also not shown.

Die Transportscheiben 12 befinden sich zwischen den Schwebeleisten 11 im Bereich der hinteren Enden der Schwebeleisten 11. Sie sind auf einer gemeinsamen, mit einem Antrieb verbundenen, Welle 23 quer zur Förderrichtung verschiebbar angeordnet. Die Transportscheiben 12 ragen 1 bis 2 mm über die Oberkanten der Schwebeleisten 11 hinaus.The transport disks 12 are located between the floating slats 11 in the region of the rear ends of the floating slats 11. They are arranged on a common shaft 23 connected to a drive so that they can be moved transversely to the conveying direction. The transport disks 12 protrude 1 to 2 mm beyond the upper edges of the floating slats 11.

Die Andrückrollen 13, sogenannte Trolleys, befinden sich senkrecht oberhalb der Transportscheiben 12. Sie sind jeweils quer zur Förderrichtung pendelnd gelagert und werden pneumatisch auf die Transportscheiben 12 gedrückt. Ihr Durchmesser beträgt etwa ein Drittel des Durchmessers der Transportscheiben 12. Transportscheiben 12 und Andrückrollen 13 sind ebenfalls quer zur Förderrichtung verschiebbar angeordnet.The pressure rollers 13, so-called trolleys, are located vertically above the transport disks 12. They are each pivoted transversely to the conveying direction and are pressed pneumatically onto the transport disks 12. Their diameter is approximately one third of the diameter of the transport disks 12. Transport disks 12 and pressure rollers 13 are also arranged to be displaceable transversely to the conveying direction.

An den hinteren Enden der Schwebeleisten 11 in Förderrichtung hinter den Achsen und damit hinter der Berührungslinie von Transportscheiben 12 und Andrückrollen 13 sind an den Schwebeleisten 11 jeweils an einer Seite höhenverstellbare, schmale Nocken 24 befestigt. Eine Nocke 24 besteht beispielsweise aus einem schmalen quadratischen Blech, dessen obere Seite abgeschrägt ist, wobei die durch die Schräge gebildete Spitze abgerundet ist. Die Nocken 24 sind so montiert, daß ihre Spitzen in Förderrichtung zeigen und über die Oberkante der Schwebeleisten 11 hinausragen. Sie können ein Langloch aufweisen und mit Schrauben an den Schwebeleisten 11 befestigt sein. Die Nocken 24 bilden über die Förderbreite in regelmäßigen Abständen angeordnete Erhebungen, die etwas über die Förderebene hinausragen. Diese Erhebungen führen zu einem leicht sinusförmigen Verlauf der Bogen 1 quer zur Förderrichtung.At the rear ends of the floating slats 11 in the conveying direction behind the axes and thus behind the line of contact between the transport disks 12 and pressure rollers 13, narrow cams 24 which are adjustable in height are attached to the floating slats 11 on one side. A cam 24 consists, for example, of a narrow square plate, the upper side of which is chamfered, the tip formed by the chamfer being rounded. The cams 24 are mounted so that their tips point in the conveying direction and protrude beyond the upper edge of the floating slats 11. They can have an elongated hole and can be fastened to the floating slats 11 with screws. The cams 24 form elevations which are arranged at regular intervals over the conveying width and protrude somewhat beyond the conveying plane. These elevations lead to a slightly sinusoidal course of the sheets 1 transverse to the conveying direction.

Direkt anschließend an die Andrückrollen 13 und die Transportscheiben 12 sind die Bürstenwalze 14 mit einem Führungskamm 25 und der Führungstisch 15 angeordnet.Directly after the pressure rollers 13 and the transport disks 12, the brush roller 14 with a guide comb 25 and the guide table 15 are arranged.

Die oberhalb der Förderebene angeordnete Bürstenwalze 14 weist eine Hohlwalze 26 aus Kohlefasern, an der in einem achsialen Abstand von 5 bis 20 mm, beispielsweise von 10 mm, je einer bis fünf Bürstenbüschel 27, beispielsweise eine Reihe aus drei Bürstenbüscheln 27, angebracht sind, auf. Die Bürstenbüschel 27 sind am Umfang der Hohlwalze 26 radial in einem Winkel von 10 bis 60°, beispielsweise etwa 40°, entsprechenden Bereich angeordnet. Die Bürstenbüschel 27 sind in kleinen Stahlzylindern 28 mit Außengewinde gefaßt. Diese Stahlzylinder 28 sind in entsprechenden, in die Hohlwalze 26 eingelassenen Stahlzylinder 29 mit Innengewinde eingeschraubt.The brush roller 14 arranged above the conveying plane has a hollow roller 26 made of carbon fibers, to which one to five brush tufts 27, for example a row of three brush tufts 27, are attached at an axial distance of 5 to 20 mm, for example 10 mm . The brush tufts 27 are arranged on the circumference of the hollow roller 26 radially at an angle of 10 to 60 °, for example approximately 40 °, corresponding area. The brush tufts 27 are contained in small steel cylinders 28 with an external thread. These steel cylinders 28 are screwed into corresponding steel cylinders 29 with an internal thread embedded in the hollow roller 26.

Die Bürstenwalze 14 ist so angeordnet, daß ein unterer Abschnitt einer strichpunktiert eingezeichneten Bahnkurve 30 der Enden der Bürstenbüschel 27 in Förderrichtung hinter den an den Enden der Schwebeleisten 11 angeordneten Nocken 24 unterhalb der Förderebene verläuft und dicht an den ebenfalls unterhalb der Förderebene, im Abstand von etwa 30 bis 70 mm, z. B. 50 mm, zur Förderebene, angeordneten Führungstisch 15 heranragt. Die Bürstenwalze 14 ist an einem Servomotor angeschlossen.The brush roller 14 is arranged so that a lower portion of a dash-dotted path curve 30 of the ends of the brush tufts 27 extends in the conveying direction behind the cams 24 arranged at the ends of the floating bars 11 below the conveying plane and close to the likewise below the conveying plane, at a distance of about 30 to 70 mm, e.g. B. 50 mm, to the conveyor level, arranged guide table 15 protrudes. The brush roller 14 is connected to a servo motor.

Der Führungskamm 25 weist schmale, 2 bis 10 mm, beispielsweise 5 mm breite, Stege auf, die in den Zwischenräumen zwischen den Reihen aus Bürstenbüscheln 27 der Bürstenwalze 14 angeordnet sind. Die Stege sind in etwa U-förmig gebogen, wobei ihre Schenkel 31 oberhalb der Bürstenwalze 14 so an quer zur Förderrichtung angeordneten Trägern 32, z. B. sich über die Breite der Baueinheit erstreckende Flacheisen, befestigt sind, daß die horizontal verlaufenden Böden 33 der U's die Förderebene nach oben begrenzen. Die Böden 33 der Stege ragen an ihren vorderen, abgerundeten Ende nahe an die Nocken 24 und mit ihren hinteren, abgeschrägten Ende dicht an die Schwebeleisten 16 der zweiten Fördervorrichtung, wobei die Schräge der hinteren Enden tangential zur Bahnkurve 30 der Enden der Bürstenbüschel 27 verläuft.The guide comb 25 has narrow, 2 to 10 mm, for example 5 mm wide, webs which are arranged in the spaces between the rows of brush tufts 27 of the brush roller 14. The webs are bent approximately into a U-shape, their legs 31 above the brush roller 14 on supports 32 arranged transversely to the conveying direction, for. B. extending across the width of the unit flat iron are attached that the horizontally extending floors 33 of the U's limit the conveying plane upwards. The bottoms 33 of the webs protrude at their front, rounded ends close to the cams 24 and with their rear, beveled ends close to the suspension bars 16 of the second conveyor device, the bevel of the rear ends being tangential to the path curve 30 of the ends of the brush tufts 27.

Der Führungstisch 15 der Ablenkvorrichtung erstreckt sich über die Breite der Baueinheit und in Förderrichtung von den Transportscheiben 12 bis zum Stapeltisch 18. Er ist als Injektortisch ausgebildet und weist im oben genannten Abstand, eine parallel zur Förderebene angeordnete, obere Platte 34, eine darunter angeordnete, untere Platte 35 und ein Injektorrohr 36 auf. Die untere Platte 35 verläuft bis in die Nähe des Stapeltisches 18 parallel zur oberen Platte 34. Der Abstand zwischen oberer Platte 34 und unterer Platte 35 wird in diesem Bereich durch Abstandshalter 37 konstant gehalten. In der Nähe des Stapeltisches 18 ist die untere Platte 35 über ihre gesamte Breite zur oberen Platte 34 hochgebogen und verläuft ein kleines Stück in geringem Abstand zur oberen Platte 34. Dadurch wird ein Blasspalt 38, dessen Blasrichtung in Förderrichtung über den Stapeltisch 18 zeigt, gebildet.The guide table 15 of the deflection device extends over the width of the structural unit and in the conveying direction from the transport disks 12 to the stacking table 18. It is designed as an injector table and has, at the above-mentioned distance, an upper plate 34 arranged parallel to the conveying plane, an underneath one, lower plate 35 and an injector tube 36. The lower plate 35 runs parallel to the upper plate 34 up to the vicinity of the stacking table 18. The distance between the upper plate 34 and the lower plate 35 is kept constant in this area by spacers 37. In the vicinity of the stacking table 18, the lower plate 35 is bent up over its entire width to the upper plate 34 and runs a small distance at a short distance from the upper plate 34. This forms a blowing gap 38, the blowing direction of which points over the stacking table 18 in the conveying direction .

Im vorderen Bereich des Führungstisches 15 weist die obere Platte 34 Saugöffungen 39, beispielsweise sich über die Förderbreite erstreckende Lochreihen, auf. Diese Lochreihen enden unterhalb des hinteren Bereiches des Führungskammes 25.In the front area of the guide table 15, the upper plate 34 has suction openings 39, for example rows of holes extending over the conveying width. These rows of holes end below the rear area of the guide comb 25.

Am vorderen, den Transportwalzen 12 zugewandten Ende des Führungstisches 15 ist das Injektorrohr 36 quer zur Förderrichtung zwischen oberer und unterer Platte 34, 35 auf der unteren Platte 35 befestigt. Es weist an seiner hinteren, d. h. seiner in Förderrichtung weisenden, Seite eine achsparallele Reihe von Öffnungen 40, z. B. Bohrungen, auf und ist an eine Druckluftversorgung angeschlossen.At the front end of the guide table 15 facing the transport rollers 12, the injector tube 36 is fastened on the lower plate 35 transversely to the conveying direction between the upper and lower plates 34, 35. It points to its rear, ie its pointing in the conveying direction, side an axially parallel row of openings 40, z. B. holes, and is connected to a compressed air supply.

Die untere Platte 35 ist über eine Platte 41 an einem quer zur Förderrichtung angeordneten Träger 42 befestigt. Der Führungstisch 15 ist über eine nicht dargestellte Schwenkvorrichtung gemäß Pfeil B nach unten abschwenkbar.The lower plate 35 is fastened via a plate 41 to a carrier 42 arranged transversely to the conveying direction. The guide table 15 can be swiveled downward according to arrow B via a swivel device (not shown).

Der hinter dem Führungstisch 15 angeordnete Stapeltisch 18 ist an üblichen Hub- und Senkvorrichtungen angeschlossen und ist an seinem vorderen Ende mit einem Hinterkantenanschlag 43 und an seinem hinteren Ende mit einem Vorderkantenanschlag 44 versehen. Der Hinterkantenanschlag 43 und der Vorderkantenanschlag 44 weisen feststehende und bewegliche Teile auf. In Figur 2 ist schematisch eine feststehende Platte 45 und eine bewegliche Platte 46, auch Rüttler genannt, des Hinterkantenanschlages 43 dargestellt. Der Vorderkantenanschlag 44 ist in Förderrichtung verschiebbar angeordnet, wobei der maximale Abstand zwischen Hinterkantenanschlag 43 und Vorderkantenanschlag 44 der maximalen Bogenlänge lmax und der entsprechende minimale Abstand der minimalen Bogenlänge lmin entspricht.The stacking table 18 arranged behind the guide table 15 is connected to conventional lifting and lowering devices and is provided with a rear edge stop 43 at its front end and with a front edge stop 44 at its rear end. The rear edge stop 43 and the front edge stop 44 have fixed and movable parts. FIG. 2 schematically shows a fixed plate 45 and a movable plate 46, also called a vibrator, of the rear edge stop 43. The front edge stop 44 is arranged to be displaceable in the conveying direction, the maximum distance between the rear edge stop 43 and the front edge stop 44 corresponding to the maximum arc length l max and the corresponding minimum distance to the minimum arc length l min .

Die Schwebeleisten 16 der zweiten Fördervorrichtung befinden sich oberhalb der Förderebene, wobei ihre Unterkanten einen geringen Abstand zur Förderebene aufweisen. Sie erstrecken sich parallel zur Förderrrichtung ausgehend vom Führungskamm 25 über den hinteren Teil des Führungstisches 15, über den Stapeltisch 18 und über den Stapeltisch 18 hinaus. Sie sind ebenfalls quer zur Förderrichtung verschiebbar angeordnet. Die vorderen Enden der Schwebeleisten 16 sind dem Verlauf der Stege des Führungskammes 25 entsprechend abgeschrägt, so daß ihre Unterkanten dicht an die Bahnkurve 30 der Enden der Bürstenbüschel 37 heranragen.The floating slats 16 of the second conveying device are located above the conveying plane, their lower edges being at a short distance from the conveying plane. They extend parallel to the conveying direction, starting from the guide comb 25 over the rear part of the guide table 15, beyond the stacking table 18 and beyond the stacking table 18. They are also arranged to be displaceable transversely to the conveying direction. The front ends of the floating slats 16 are beveled in accordance with the course of the webs of the guide comb 25, so that their lower edges protrude closely to the path curve 30 of the ends of the brush tufts 37.

In dem Bereich außerhalb des Stapeltisches 18 weisen die Schwebeleisten 16 keine Düsenöffnungen mehr auf. Etwa in der Mitte des übrigen Bereiches mit Düsenöffnungen sind die Schwebeleisten 16 durch Trennwände 47 in einen vorderen und einen hinteren Abschnitt geteilt. In jedem Abschnitt sind die Schwebeleisten 16 über flexible Kunststoffrohre 48, einen gemeinsamen Luftkanal 49 und eine Luftleitung 50 an dem Verteiler, an dem auch die Schwebeleisten 11 der ersten Fördervorrichtung angeschlossen sind, angeschlossen. Dabei sind die Kunststoffrohre 48, der gemeinsame Luftkanal 49 und die Luftleitung 50 des hinteren Abschnittes in dem Bereich außerhalb des Stapeltisches 18 angeordnet.In the area outside the stacking table 18, the floating slats 16 no longer have any nozzle openings. Approximately in the middle of the rest of the area with nozzle openings, the floating slats 16 are divided by partition walls 47 into a front and a rear section. In each section, the floating slats 16 are connected to the distributor to which the floating slats 11 of the first conveyor device are connected via flexible plastic tubes 48, a common air duct 49 and an air line 50. The plastic tubes 48, the common air duct 49 and the air line 50 of the rear section are arranged in the area outside the stacking table 18.

Die Bremsvorrichtung weist neben den Bremsbändern 17 eine gemeinsame, quer zur Förderrichtung angeordnete Antriebswelle 51, einen Träger 52, einen Antriebsmotor 53 und zwei Schienen 54 auf. Die Bremsbänder 17 sind in einigen der Zwischenräume zwischen den Schwebeleisten 16, beispielsweise in jedem zweiten bis fünften Zwischenraum, angeordnet. Die zwischen je zwei Schwebeleisten 16 angeordneten Bremsbänder 17 sind jeweils um drei Rollen 55, 56 und 57 mit quer zur Förderrichtung angeordneten Achsen geführt. Die Rollen 55 und 56 sind jeweils in Förderrichtung hintereinander angeordnet, wobei ihre horizontale Lage so ausgerichtet ist, daß die Unterseiten der Bremsbänder 17 in den Abschnitten zwischen den Rollen 55, 56 die Förderebene nach oben begrenzen.In addition to the brake bands 17, the braking device has a common drive shaft 51 arranged transversely to the conveying direction, a carrier 52, a drive motor 53 and two rails 54. The brake bands 17 are arranged in some of the spaces between the floating strips 16, for example in every second to fifth space. The brake bands 17 arranged between two floating slats 16 are each guided around three rollers 55, 56 and 57 with axes arranged transversely to the conveying direction. The rollers 55 and 56 are each arranged one behind the other in the conveying direction, their horizontal position being oriented such that the undersides of the brake bands 17 in the sections between the rollers 55, 56 limit the conveying plane upwards.

Die dritten Rollen 57 befinden sich oberhalb der Schwebeleisten 16. Sie sind als Antriebsrollen ausgebildet und auf der gemeinsamen Antriebswelle 51 befestigt. Der mit unterschiedlichen Geschwindigkeiten zu betreibende Antriebsmotor 53 ist auf dem ebenfalls quer zur Förderrichtung angeordneten Träger 52, z. B. einem Vierkantrohr, befestigt und ist über ein durch eine Öffnung im Träger 52 ragendes Getriebe 58 mit Kegelrädern mit der Antriebswelle 51 verbunden.The third rollers 57 are located above the floating slats 16. They are designed as drive rollers and fastened on the common drive shaft 51. The drive motor 53 to be operated at different speeds is on the carrier 52 which is also arranged transversely to the conveying direction, for. B. a square tube, and is connected via a projecting through an opening in the carrier 52 gear 58 with bevel gears to the drive shaft 51.

Der Träger 52 ist an seinen seitlichen Enden auf den beiden, parallel zur Förderrichtung verlaufenden Schienen 54 geführt und an einen nicht dargestellten Antrieb, z. B. einen von Hand zu betätigenden Spindelantrieb, angeschlossen. Die Schienen 54 erstrecken sich an den seitlichen Rändern der Baueinheit entlang des Stapeltisches 18.The carrier 52 is guided at its lateral ends on the two rails 54 running parallel to the conveying direction and to a drive, not shown, for. B. connected to a manually operated spindle drive. The rails 54 extend along the stacking table 18 at the lateral edges of the assembly.

Die Bremsbänder 17 sind als Saugbänder ausgebildet. Sie weisen gleichmäßig angeordnete Öffnungen 59 auf, wobei die freie Fläche durch die Fläche der Öffnungen 59 ein Viertel bis die Hälfte der Fläche der Bremsbänder 17 beträgt. Die Öffnungen 59 sind beispielsweise rund und haben einen Durchmesser von z. B. 5 mm. Die Bremsbänder 17 weisen eine haftende, z. B. gummierte, Oberfläche auf. Ihre Breite beträgt z. B. 25 mm.The brake bands 17 are designed as suction bands. They have openings 59 arranged uniformly, the free area through the area of the openings 59 being a quarter to half the area of the brake bands 17. The openings 59 are, for example, round and have a diameter of, for. B. 5 mm. The brake bands 17 have an adhesive, for. B. rubberized, surface on. Its width is z. B. 25 mm.

Die Räume im Inneren der endlosen, um die Rollen 55, 56, 57 geführten Bremsbänder 17 werden zum großen Teil durch Saugkästen 60, deren Breite der Breite der Bremsbänder 17 in etwa entspricht, ausgefüllt. Die Saugkästen 60 sind über nicht dargestellte Luftleitungen, z. B. seitlich an den Saugkästen 60 oberhalb der Schwebeleisten 16 angeordnete Anschlußstutzen, flexible Kunststoffrohre, einen gemeinsamen Saugkanal und eine Saugleitung, an einen weiteren, ebenfalls nicht dargestellten, Ventilator angeschlossen.The spaces inside the endless brake bands 17, which are guided around the rollers 55, 56, 57, are largely filled by suction boxes 60, the width of which approximately corresponds to the width of the brake bands 17. The suction boxes 60 are via air lines, not shown, for. B. laterally on the suction boxes 60 above the floating slats 16 arranged connecting piece, flexible plastic pipes, a common suction channel and a suction line, connected to another, also not shown, fan.

Die Saugkästen 60 sind so angeordnet, daß die Bremsbänder 17 zwischen den Rollen 55 und 56 an Böden 61 der Saugkästen 60 anliegen. Die Böden 61 weisen längliche, versetzt angeordnete Schlitze 62 auf. Die Breite der Schlitze 62 beträgt beispielsweise 5 mm, ihre Länge z. B. 20 mm. Die freie Fläche durch die Schlitze 62 beträgt ein Drittel bis zwei Drittel der Fläche des Bodens 61.The suction boxes 60 are arranged such that the brake bands 17 lie against the floors 61 of the suction boxes 60 between the rollers 55 and 56. The bottoms 61 have elongated, offset slots 62. The width of the slots 62 is for example 5 mm, their length z. B. 20 mm. The free area through the slots 62 is one third to two thirds of the area of the bottom 61.

Zur Verbindung mit der Antriebswelle 51 sind die Antriebsrollen 57 der Bremsbänder 17 jeweils über eine Schraube 63 und ein Paßelement 64 drehfest auf einer als Innenvielkant ausgebildeten, auf der Antriebswelle 51 angeordneten Hohlwelle 65 befestigt. Die Antriebswelle 51 ist dementsprechend als Außenvielkant ausgebildet.For connection to the drive shaft 51, the drive rollers 57 of the brake bands 17 are each fixed in a rotationally fixed manner via a screw 63 and a fitting element 64 on a hollow shaft 65 which is designed as an internal polygon and is arranged on the drive shaft 51. The drive shaft 51 is accordingly designed as an external polygon.

Die Bremsvorrichtung weist für jedes Bremsband 17 eine Halterung 66 auf, die mit den Rollen 55, 56, 57 und dem Saugkasten 60 verbunden ist. Die Halterung 66 ist, z. B. mit Hilfe von am Träger 52 abgestützte Laschen, positioniert.The braking device has a holder 66 for each brake band 17, which is connected to the rollers 55, 56, 57 and the suction box 60. The bracket 66 is, for. B. positioned by means of brackets supported on the carrier 52.

Die Hohlwelle 65 ragt an beiden Seiten aus der Rolle 57 heraus, ist in diesen Bereichen von schmalen Hohlzylindern der Halterung 66 umgeben und über Lager 67 mit diesen verbunden. Die Halterung 66 weist außerdem zwei parallel zur Förderrichtung von den Seiten der Rolle 57 bis zu den Seiten der Rolle 55 verlaufende Platten auf, an denen der zwischen den Platten angeordnete Saugkasten 60 und eine Welle 68 der Rolle 55 befestigt ist. Die Platten der Halterung 66 können auch als Seitenplatten des Saugkastens 60 ausgebildet sein.The hollow shaft 65 protrudes from the roller 57 on both sides, is surrounded in these areas by narrow hollow cylinders of the holder 66 and is connected to the latter via bearings 67. The holder 66 also has two plates running parallel to the conveying direction from the sides of the roller 57 to the sides of the roller 55, to which the suction box 60 arranged between the plates and a shaft 68 of the roller 55 are fastened. The plates of the holder 66 can also be designed as side plates of the suction box 60.

Eine Welle 69 der Rolle 56, deren Lager 70 in Figur 4 zu sehen ist, ist über einem unterhalb der Rolle 57 zwischen den Platten angeordneten Halter 71 mit der Halterung 66 verbunden. Der Halter ist auf einer zur Welle 69 parallelen, an den Platten der Halterung 66 befestigten Welle angeordnet. Unterhalb der Welle 72 weist der Halter 71 eine senkrecht zu den Wellen 69, 72 in einer Gewindebohrung angeordnete Gewindestange 73 auf. Die Gewindestange 73 ist außerhalb des Halters 71 an einer Gehäusewand 75 des Saugkastens 60 abstützt. Durch Herausschrauben der Gewindestange 73 kann das jeweilige Bremsband 17 gespannt werden.A shaft 69 of the roller 56, the bearing 70 of which can be seen in FIG. 4, is connected to the holder 66 via a holder 71 arranged below the roller 57 between the plates. The holder is arranged on a shaft parallel to the shaft 69 and fastened to the plates of the holder 66. Below the shaft 72, the holder 71 has a threaded rod 73 arranged perpendicular to the shafts 69, 72 in a threaded bore. The threaded rod 73 is supported outside of the holder 71 on a housing wall 75 of the suction box 60. The respective brake band 17 can be tensioned by unscrewing the threaded rod 73.

Die Hohlwelle 65 ist verschiebbar auf der Antriebswelle 51 angeordnet und wird durch seitliche Klemmscheiben 75 auf der Antriebswelle 51 positioniert. Dadurch sind auch die Bremsbänder 17 quer zur Förderrichtung verschiebbar angeordnet.The hollow shaft 65 is slidably arranged on the drive shaft 51 and is positioned on the drive shaft 51 by side clamping disks 75. As a result, the brake bands 17 are also arranged to be displaceable transversely to the conveying direction.

Die Träger 8, 42 sowie der Zufuhrkanal 20, der Luftkanal 22 und die beiden Luftkanäle 49 erstrecken sich über die Breite der Baueinheit und sind am Rahmen 2 befestigt. Sie bestehen beispielsweise aus Vierkantrohren.The carriers 8, 42 and the supply duct 20, the air duct 22 and the two air ducts 49 extend across the width of the structural unit and are fastened to the frame 2. she consist of square tubes, for example.

Einlaufvorrichtung, Querschneider und erfindungsgemäße Vorrichtung weisen jeweils ein Gehäuse 76, 77, 78 auf, wobei das Gehäuse des Querschneiders ein die Messerwalze 10 umgebendes Schallschutzgehäuse ist.Inlet device, cross cutter and device according to the invention each have a housing 76, 77, 78, the housing of the cross cutter being a soundproofing housing surrounding the cutter block 10.

Der Abstand zwischen unterem Messer 6 und Transportscheiben 12, d. h. der Abstand zwischen der Schneide des unteren Messers 6 und der Berührungslinie von Transportwalzen 12 und Andrückrollen 13, ist etwas kleiner als die minimale Bogenlänge lmin·The distance between the lower knife 6 and the transport disks 12, ie the distance between the cutting edge of the lower knife 6 and the line of contact between the transport rollers 12 and pressure rollers 13, is somewhat smaller than the minimum arc length l min .

Der Abstand zwischen Transportscheiben 12 und den in vorderster Stellung angeordneten Bremsbändern 17 ist etwas größer als die minimale Bogenlänge lmin und der Abstand zwischen Transportscheiben 12 und Hinterkantenanschlag 43 des Stapeltisches 18 ist etwas größer als der Abstand der beiden unteren Rollen 55, 56 der Bremsbänder 17. Insbesondere entspricht die Länge des Führungstisches 15 dem Abstand der beiden unteren Rollen 55, 56 der Bremsbänder 17, d. h. die Länge der Bremsbänder 17 in Förderrichtung. Das Verhältnis der Länge der Bremsbänder 17 in Förderrrichtung und der maximalen Bogenlängen lmax beträgt 0,04 bis 0,3 insbesondere 0,1 bis 0,25. Die maximale Bogenlänge lmax kann beispielsweise 1.100 mm, die minimale Bogenlänge lmin beispielsweise 580 mm die Förderbreite etwa 1.500 mm und die Länge der Bremsbänder 17 in Förderrichtung 200 mm sein.The distance between the transport disks 12 and the brake bands 17 arranged in the foremost position is somewhat larger than the minimum arc length l min and the distance between the transport disks 12 and the rear edge stop 43 of the stacking table 18 is somewhat larger than the distance between the two lower rollers 55, 56 of the brake bands 17 In particular, the length of the guide table 15 corresponds to the distance between the two lower rollers 55, 56 of the brake bands 17, ie the length of the brake bands 17 in the conveying direction. The ratio of the length of the brake bands 17 in the conveying direction and the maximum arc lengths l max is 0.04 to 0.3, in particular 0.1 to 0.25. The maximum arc length l max can, for example, be 1,100 mm, the minimum arc length l min, for example 580 mm, the conveying width approximately 1,500 mm and the length of the brake bands 17 in the conveying direction 200 mm.

Im Betrieb wird die mit Produktionsgeschwindigkeit über die Einlaufvorrichtung angelieferte Bahn 4 durch den Querschneider auf die vorbestimmte Bogenlänge abgeschnitten. Nach einem Schnitt wird die vordere Kante der Bahn 4 durch die Schwebeleisten 11 der ersten Fördervorrichtung auf einem Luftpolster zu den Transportscheiben 12 und den Andrückrollen 13 gefördert. Da der Abstand zwischen dem unteren Messer 6 und den Transportscheiben 12 kleiner ist als die minimale Bogenlänge lmin, wird die Bahn 4 vor dem Schnitt von den Transportscheiben 12 und den Andrückrollen 13 erfaßt. Die Transportscheiben 12 werden mit einer Umfangsgeschwindigkeit, im folgenden Fördergeschwindigkeit genannt, angetrieben, die um 1 bis 2 % größer ist als die Produktionsgewindigkeit. Dadurch wird die Bahn 4 vor dem Schnitt straff gezogen. Nach dem Schnitt wird der gerade abgeschnittene Bogen 1 gegenüber der Bahn 4 beschleunigt, so daß eine Lücke zur Bahn 4 und damit zum folgenden Bogen 1 entsteht.In operation, the web 4 delivered at the production speed via the infeed device is cut to the predetermined arc length by the cross cutter. After a cut, the front edge of the web 4 is conveyed through the floating slats 11 of the first conveying device on an air cushion to the transport disks 12 and the pressure rollers 13. Since the distance between the lower knife 6 and the transport disks 12 is smaller than the minimum arc length l min , the web 4 is gripped by the transport disks 12 and the pressure rollers 13 before the cut. The transport disks 12 are driven at a peripheral speed, hereinafter referred to as the conveying speed, which is 1 to 2% greater than the production speed. As a result, the web 4 is pulled taut before the cut. After the cut, the sheet 1 that has just been cut is accelerated with respect to the web 4, so that a gap to the web 4 and thus to the following sheet 1 is created.

Die die Transportwalzen 12 und die Schwebeleisten 11 der ersten Fördervorrichtung verlassende vordere Kante der Bahn 4 bzw. nach dem Schnitt die Vorderkante des abgeschnittenen Bogens 1 wird bei hochstehenden Bürstenbüscheln 27 der Bürstenwalze 14 entlang des Führungskamms 25 zu den Schwebeleisten 16 der zweiten Fördervorrichtung und von den Schwebeleisten 16 über den Stapeltisch 18 bis zu den Bremsbändern 17 gefördert, wobei auch in diesem Fall zwischen den Schwebeleisten 16 und dem darunter geförderten Bogen 1 ein Luftpolster besteht.The the transport rollers 12 and the floating slats 11 of the first conveyor Leaving front edge of the web 4 or, after the cut, the front edge of the cut sheet 1 becomes, when the brush tufts 27 of the brush roller 14 stand up, along the guide comb 25 to the floating strips 16 of the second conveying device and from the floating strips 16 via the stacking table 18 to the brake belts 17 promoted, in which case there is an air cushion between the floating slats 16 and the sheet 1 conveyed below.

Sobald die Hinterkante des abgeschnittenen, ersten Bogens 1 die Schwebeleisten 11 verläßt, wird sie von den Bürstenbüscheln 27 der mit Hilfe des Servomotors beschleunigten Bürstenwalze 14 erfaßt. Die Umfangsgeschwindigkeit der Bürstenwalze 14 entspricht in diesem Moment der Fördergeschwindigkeit, so daß die Hinterkante des ersten Bogens 1 durch eine kurze Berührung der Bürstenbüschel 27 aus der Förderebene nach unten auf den Führungstisch 15 abgelenkt wird. Anschließend wir die Bürstenwalze 14 wieder abgebremst, um erst zum Ablenken des folgenden Bogens 1, d. h. in Abhängigkeit von der jeweiligen Bogenlänge, die auch die Schnittfrequenz des oberen Messers 7 bestimmt, wieder beschleunigt zu werden.As soon as the rear edge of the cut, first sheet 1 leaves the floating slats 11, it is gripped by the brush tufts 27 of the brush roller 14 accelerated with the aid of the servo motor. The circumferential speed of the brush roller 14 corresponds to the conveying speed at this moment, so that the rear edge of the first sheet 1 is deflected downwards onto the guide table 15 by briefly touching the brush tufts 27 from the conveying plane. Then we brake the brush roller 14 again, only to deflect the following sheet 1, i.e. H. depending on the respective arc length, which also determines the cutting frequency of the upper knife 7, to be accelerated again.

Die durch das Injektorrohr 36 austretende Druckluft erzeugt eine Luftströmung zwischen oberer und unterer Platte 34, 35 in Förderrichtung und damit in den Saugöffnungen 39 der oberen Platte des Führungstisches 15 eine Saugwirkung, durch die die abgelenkte Hinterkante des ersten Bogens 1 auf dem Führungstisch 15 gehalten wird. Sobald die Hinterkante des ersten Bogens 1 abgelenkt ist, erreicht seine Vorderkante die zwischen den oberen Schwebeleisten 16 angeordneten Bremsbändern 17. Der Bogen 1 wird auf Bremsgeschwindigkeit abgebremst.The compressed air exiting through the injector tube 36 creates an air flow between the upper and lower plates 34, 35 in the conveying direction and thus in the suction openings 39 of the upper plate of the guide table 15, a suction effect by which the deflected rear edge of the first sheet 1 is held on the guide table 15 . As soon as the rear edge of the first sheet 1 is deflected, its front edge reaches the brake bands 17 arranged between the upper floating bars 16. The sheet 1 is braked to the braking speed.

Die als Saugbänder ausgebildeten Bremsbänder 17 laufen über die Saugkästen 60, wodurch die Vorderkanten der Bögen 1 sicher an den Bremsbändern 17 haften, ohne daß auf den Bogen 1 Abdrücke entstehen.The brake bands 17 designed as suction bands run over the suction boxes 60, as a result of which the front edges of the sheets 1 adhere securely to the brake bands 17, without leaving marks on the sheet 1.

Auch die Vorderkante des folgenden, mit Fördergeschwindigkeit ankommenden Bogens 1 wird bei hochstehenden Bürstenbüscheln 27 der Bürstenwalze 14 entlang der Führungskammes 25 zu den Schwebeleisten 16 der zweiten Fördervorrichtung und von diesen über den Stapeltisch 18 bis zu den Bremsbändern 17 gefördert. Da der erste Bogen 1 währenddessen mit nach unten abgelenkter, auf dem Führungstisch 15 geführter Hinterkante mit Bremsgeschwindigkeit bewegt wird, überlappt die Vorderkante des zweiten Bogens 1 die Hinterkante des ersten Bogens 1 und gelangt in den Spalt zwischen den Schwebeleisten 16 und ersten Bogen 1.The leading edge of the following sheet 1 arriving at the conveying speed is also conveyed in the case of upright brush tufts 27 of the brush roller 14 along the guide comb 25 to the floating slats 16 of the second conveying device and from there via the stacking table 18 to the brake belts 17. Since the first sheet 1 is meanwhile moved with the trailing edge deflected downward and guided on the guide table 15 at braking speed, the leading edge of the second sheet 1 overlaps the trailing edge of the first sheet 1 and reaches the gap between the floating slats 16 and the first sheet 1.

Sobald die Hinterkante des zweiten Bogens 1 die Schwebeleisten 11 verläßt, wird sie ebenfalls durch die Bürstenbüschel 27 der Bürstenwalze 14 auf den im Anfangsbereich wieder freien Führungstisch 15 abgelenkt. Auch beim zweiten Bogen 1 erreicht die Vorderkante die Bremsbänder 17, sobald die Hinterkante abgelenkt ist. Der zweite Bogen 1 wird ebenfalls auf Bremsgeschwindigkeit abgebremst. Seine Vorderkante haftet vor der des ersten Bogens 1 an den Bremsbändern 17. Erster und zweiter, überlappter Bogen 1 werden mit Bremsgeschwindigkeit zum hinteren Ende der Stapelvorrichtung gefördert. Der erste Bogen 1 wird am Vorderkantenanschlag 44 des Stapeltisches 18 gestoppt, vom folgenden, zweiten Bogen 1 von den Bremsbändern 17 abgeschält und fällt dann auf den Stapel. Entsprechendes gilt für die folgenden Bogen 1. In die herabfallenden Bogen 1 strömt durch den Balsspalt 38 Luft, wodurch das Justieren der Bogen 1 vereinfacht wird.As soon as the rear edge of the second sheet 1 leaves the floating slats 11, it is likewise deflected by the brush tufts 27 of the brush roller 14 onto the guide table 15 which is again free in the initial area. In the second sheet 1, too, the front edge reaches the brake bands 17 as soon as the rear edge is deflected. The second sheet 1 is also braked to braking speed. Its front edge adheres to the brake bands 17 before that of the first sheet 1. The first and second, overlapped sheets 1 are conveyed at braking speed to the rear end of the stacking device. The first sheet 1 is stopped at the front edge stop 44 of the stacking table 18, peeled off from the braking band 17 by the following, second sheet 1 and then falls onto the stack. The same applies to the following sheets 1. Air flows into the falling sheets 1 through the ball gap 38, which simplifies the adjustment of the sheets 1.

Da die Vorderkanten der Bogen 1 von den Bremsbändern 17 in den Spalt zwischen den Schwebeleisten 16 und dem zuvor abgebremsten Bogen 1 gelangen, werden sie bereits während des Ablenkens der Hinterkanten ein wenig abgebremst. Damit wird ein abrupter Übergang von Fördergeschwindigkeit auf Bremsgeschwindigkeit vermieden.Since the leading edges of the sheets 1 reach the gap between the suspension bars 16 and the previously braked sheet 1 from the braking bands 17, they are braked a little already while the trailing edges are deflected. This prevents an abrupt transition from conveying speed to braking speed.

Der Überlappungsgrad der Bogen 1 ist umso größer je geringer das Verhältnis zwischen Bremsgeschwindigkeit und Fördergeschwindigkeit ist. Damit der Überlappungsgrad so groß ist, daß an den Bremsbändern 17 gleichzeitig mindestens zwei Bogen 1 abgebremst werden, ist die Länge der Bremsbänder 17 auf die maximale Bogenlänge lmax abgestimmt. Dabei ist das Verhältnis der beiden Größen mindestens doppelt so groß wie das Doppelte des gewünschten Verhältnisses aus Bremsgeschwindigkeit und Fördergeschwindigkeit. Die Bremsgeschwindigkeit beträgt 2 bis 15 %, insbesondere 3 bis 10 %, der Produktionsgeschwindigkeit. Da die Fördergeschwindigkeit nur wenig höher ist als die Produktionsgeschwindigkeit gelten diese Bereiche auch für das Verhältnis aus Bremsgeschwindigkeit und Fördergeschwindigkeit. Die Produktionsgeschwindigkeiten betragen 100 bis 600 m/min.The degree of overlap of sheets 1 is greater the lower the ratio between braking speed and conveying speed. So that the degree of overlap is so great that at least two sheets 1 are braked simultaneously on the brake bands 17, the length of the brake bands 17 is matched to the maximum sheet length l max . The ratio of the two sizes is at least twice as large as twice the desired ratio of braking speed and conveying speed. The braking speed is 2 to 15%, in particular 3 to 10%, of the production speed. Since the conveying speed is only slightly higher than the production speed, these areas also apply to the relationship between braking speed and conveying speed. The production speeds are 100 to 600 m / min.

Der an die Schwebeleisten 11, 16 angelegte Luftdruck beträgt etwa 30 bis 60 mbar, der an die Saugkästen 60 der Bremsbänder 17 angelegte Saugdruck etwa 30 bis 65 mbar und der an das Injektorrohr 36 des Führungstisches angelegte Luftdruck 0,5 bis 2 mbar.The air pressure applied to the floating strips 11, 16 is approximately 30 to 60 mbar, the suction pressure applied to the suction boxes 60 of the brake bands 17 is approximately 30 to 65 mbar and the air pressure applied to the injector tube 36 of the guide table is 0.5 to 2 mbar.

Beispielsweise Bogen aus geprägtem Papier mit einem Flächengewicht von 70 g/m2, einer Bogenlänge von etwa 1.000 mm und einer Breite von etwa 850 mm können mit einer Produktionsgeschwindigkeit von 400 m/min und einer Bremsgeschwindikeit von 16 m/min ohne Gefahr von Abdrücken eng geschuppt und mit hoher Stapelgenauigkeit abgelegt werden. Dabei werden etwa fünf Bogen 1 gleichzeitig an den Bremsbändern 17 abgebremst. Zum Umrüsten auf eine anderen Bogenlänge werden die Bremsbänder 17 durch Verschieben des Trägers 52 auf den Schienen 54 in die der anderen Bogenlänge entsprechende Lage gebracht.For example, sheets of embossed paper with a basis weight of 70 g / m 2 , a sheet length of about 1,000 mm and a width of about 850 mm can be tight with a production speed of 400 m / min and a braking speed of 16 m / min without the risk of imprints shingled and with high stacking accuracy be filed. About five sheets 1 are braked simultaneously on the brake bands 17. To convert to a different arc length, the brake bands 17 are brought into the position corresponding to the other arc length by moving the carrier 52 on the rails 54.

Mit einer erfindungsgemäßen Vorrichtung können daher zunächst Bogen 1 verschiedener Bogenlängen geschuppt und abgelegt werden. Außerdem kann die Breite der Bogen 1 durch die quer zur Förderrichtung verschiebbar angeordneten Schwebeleisten 11, Transportscheiben 12, Andrückrollen 13, Schwebeleisten 16 und Bremsbänder 17 variieren. Durch Anpassen der an die Schwebeleisten 11, 16 angelegten Druckluft, der an den als Saugbändern ausgebildeten Bremsbändern 17 angelegten Saugluft oder verschiedener in die Hohlwalze 26 der Bürstenwalze 14 einschraubbarer Bürstenbüschel 27 oder anderer Ablenkorgane, können Bogen aus den unterschiedlichsten Materialien geschuppt und abgelegt werden.With a device according to the invention, sheets 1 of different sheet lengths can therefore first be shingled and deposited. In addition, the width of the sheets 1 can vary due to the floating slats 11, transport disks 12, pressure rollers 13, floating slats 16 and brake bands 17 arranged transversely to the conveying direction. By adapting the compressed air applied to the floating strips 11, 16, the suction air applied to the brake bands 17 designed as suction bands, or various brush tufts 27 or other deflecting elements that can be screwed into the hollow roller 26 of the brush roller 14, sheets can be scaled and deposited from a wide variety of materials.

Eine erfindungsgemäße Vorrichtung ist besonders zum Schuppen und Ablegen von Bogen aus Papier, auch aus sehr dünnem Papier, insbesondere bei der Herstellung von Etiketten oder Wertpapier geeignet. Sie ist auch zum Einsatz für Verpackungsmaterial oder für Folien, z. B. für Filme geeignet. Es können Bogen aus einem Material mit Flächengewichten von 30 g/m2 bis 800 g/m2 abgelegt werden.A device according to the invention is particularly suitable for flaking and depositing sheets of paper, even of very thin paper, in particular in the production of labels or securities. It is also used for packaging material or for foils, e.g. B. suitable for films. Sheets of a material with basis weights of 30 g / m 2 to 800 g / m 2 can be deposited.

Claims (12)

  1. A device for feeding sheets onto a stack with a first conveying device (11, 12, 13), a deflecting device (14, 15) for deflecting the rear edge of the sheet downwards from a conveying plane, a second conveying device (16), a braking device (17) and a stacking device (18), wherein the first conveying device (11, 12, 13) and the deflecting device (14, 15) are arranged behind one another in the conveying direction upstream of the stacking device (18), and the second conveying device (16) comprises suspended strips (16) extending above the stacking device (18), characterised in that the braking device comprises braking belts (17), which are displaceably arranged in the rear region of the stacking device (18) between the suspended strips (16) of the second conveying device.
  2. A device according to claim 1, characterised in that the braking belts (17) comprise a common drive shaft (51) which is arranged above the stacking device so as to be displaceable in the conveying direction.
  3. A device according to claim 1 or 2, characterised in that the braking belts (17) are constructed as suction belts.
  4. A device according to one of claims 1 to 3, characterised in that the first conveying device comprises suspended strips (11) arranged beneath the conveying plane, conveyor discs (12) arranged between the suspended strips in the region of the rear ends thereof and contact rollers (13) arranged above the conveyor discs (12).
  5. A device according to claim 4, characterised in that the suspended strips (11) comprise cams (24) at the rear ends thereof, which cams project somewhat beyond the conveying plane.
  6. A device according to one of claims 1 to 5, characterised in that the deflecting device comprises a separately drivable brush roller (14), which is arranged above the conveying plane, and a guide table (15), which is arranged at a distance beneath the conveying plane and extends as far as the stacking device.
  7. A device according to claim 6, characterised in that the length of the guide table (15) approximately corresponds to the length of the braking belts (17) in the conveying direction.
  8. A device according to claim 6 or 7, characterised in that the brush roller (14) comprises a hollow roller (26) made of carbon fibres.
  9. A device according to one of claims 6 to 8, characterised in that the brush roller (14) comprises one or more radially arranged brush bundles (27) which are spaced apart axially, and webs of a guide comb (25) which define the upper limit of the conveying plane are arranged in the intermediate spaces between brush bundles (27).
  10. A device according to one of claims 6 or 9, characterised in that the guide table (15) is constructed as an injector table, said table comprising suction openings (39) in the front region thereof and an injector pipe (36) being arranged beneath the suction openings.
  11. A device according to claim 10, characterised in that the guide table (15) constructed as an injector table comprises an upper and a lower plate (34, 35), the suction openings (39) being provided in the upper plate (34), the upper and the lower plates (34, 35) form a blowing gap (38) at the rear end thereof with a blowing direction extending in the conveying direction over a stacking table (18) of the stacking device, the injector pipe (38) is arranged between the upper and lower plates (34, 35) transversely to the conveying direction and comprises openings (40) on the side thereof facing the conveying direction.
  12. A device according to one of claims 1 to 11, characterised in that it forms a structural unit together with a cross cutter.
EP94913583A 1993-05-05 1994-04-13 Device for stream feeding of sheets onto a stack Expired - Lifetime EP0697989B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE19934314756 DE4314756C2 (en) 1993-05-05 1993-05-05 Device for shedding and depositing sheets on a stack
DE4314756 1993-05-05
DE9306740U 1993-05-05
DE9306740U DE9306740U1 (en) 1993-05-05 1993-05-05 Device for shedding and depositing sheets on a stack
PCT/EP1994/001134 WO1994025384A1 (en) 1993-05-05 1994-04-13 Device for stream feeding of sheets onto a stack

Publications (2)

Publication Number Publication Date
EP0697989A1 EP0697989A1 (en) 1996-02-28
EP0697989B1 true EP0697989B1 (en) 1996-11-13

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Application Number Title Priority Date Filing Date
EP94913583A Expired - Lifetime EP0697989B1 (en) 1993-05-05 1994-04-13 Device for stream feeding of sheets onto a stack

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US (1) US5611529A (en)
EP (1) EP0697989B1 (en)
JP (1) JP3115325B2 (en)
DE (1) DE59401047D1 (en)
WO (1) WO1994025384A1 (en)

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Also Published As

Publication number Publication date
JP2000503619A (en) 2000-03-28
WO1994025384A1 (en) 1994-11-10
DE59401047D1 (en) 1996-12-19
US5611529A (en) 1997-03-18
EP0697989A1 (en) 1996-02-28
JP3115325B2 (en) 2000-12-04

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