EP0697989B1 - Dispositif permettant de transferer et d'empiler des feuilles - Google Patents

Dispositif permettant de transferer et d'empiler des feuilles 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)
English (en)
Other versions
EP0697989A1 (fr
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 DE9306740U external-priority patent/DE9306740U1/de
Priority claimed from DE19934314756 external-priority patent/DE4314756C2/de
Application filed by Vits Maschinenbau GmbH filed Critical Vits Maschinenbau GmbH
Publication of EP0697989A1 publication Critical patent/EP0697989A1/fr
Application granted granted Critical
Publication of EP0697989B1 publication Critical patent/EP0697989B1/fr
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

Les dispositifs qui permettent de transférer et d'empiler des feuilles et dont les mécanismes de freinage comportent une fente de freinage ou des éléments de serrage, sont connus. Avec ce type de dispositifs, le risque de laisser des marques par inadvertance sur les feuilles demeure toujours présent. On connaît par ailleurs de dispositifs dont les mécanismes de freinage comportent des cylindres aspirants ou des rampes d'aspiration. Ces dispositifs ne conviennent cependant qu'à des feuilles d'une certaine longueur. Le dispositif réalisé d'après l'invention permet également d'empiler des feuilles de différentes longueurs. Le mécanisme de freinage dudit dispositif comporte des bandes de freinage (17) montés déplaçables dans la zone arrière d'un dispositif d'empilage, entre des rampes de suspension (16). Ce type de dispositif permet de transférer et d'empiler sans risque des feuilles de différentes longueurs.

Claims (12)

  1. Dispositif pour transférer et déposer des feuilles sur une pile, comprenant
    - un premier dispositif de convoyage (11, 12, 13),
    - un dispositif de déviation (14, 15) pour dévier le bord postérieur des feuilles, vers le bas, à l'écart d'un plan de convoyage,
    - un second dispositif de convoyage (16),
    - un dispositif de freinage (17) et
    - un dispositif d'empilement (18),
    dispositif dans lequel
    - le premier dispositif de convoyage (11, 12, 13) et le dispositif de déviation (14, 15) sont agencés en succession dans la direction du convoyage, devant le dispositif d'empilement (18),
    et
    - le second dispositif de convoyage (16) présente des barrettes suspendues (16) s'étendant au-dessus du dispositif d'empilement (18),
    caractérisé par le fait que
    - le dispositif de freinage présente des rubans de freinage (17) qui
    - sont agencés à coulissement,
    - dans la région postérieure du dispositif d'empilement (18),
    - entre les barrettes suspendues (16) du second dispositif de convoyage.
  2. Dispositif selon la revendication 1, caractérisé par le fait que les rubans de freinage (17) comportent un arbre commun d'entraînement (51) agencé à coulissement, dans la direction du convoyage, au-dessus du dispositif d'empilement.
  3. Dispositif selon la revendication 1 ou 2, caractérisé par le fait que les rubans de freinage (17) sont réalisés sous la forme de rubans aspirants.
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé par le fait que le premier dispositif de convoyage comprend
    - des barrettes suspendues (11) situées au-dessous du plan de convoyage,
    - des disques de transport (12) interposés entre les barrettes suspendues, dans la région de leurs extrémités postérieures, et
    - des rouleaux presseurs (13) placés au-dessus des disques de transport (12).
  5. Dispositif selon la revendication 4, caractérisé par le fait que les barrettes suspendues (11) présentent, à leurs extrémités postérieures, des mentonnets (24) saillant sensiblement au-delà du plan de convoyage.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé par le fait que le dispositif de déviation comprend un cylindre (14) à brosses, situé au-dessus du plan de convoyage et pouvant être entraîné séparément, et un plateau de guidage (15) qui est implanté à distance au-dessous du plan de convoyage et s'étend jusqu'au dispositif d'empilement.
  7. Dispositif selon la revendication 6, caractérisé par le fait que la longueur du plateau de guidage (15) correspond sensiblement à la longueur des rubans de freinage (17) dans la direction du convoyage.
  8. Dispositif selon la revendication 6 ou 7, caractérisé par le fait que le cylindre (14) à brosses présente un cylindre creux (26) en des fibres de carbone.
  9. Dispositif selon l'une des revendications 6 à 8, caractérisé par le fait que
    - le cylindre (14) à brosses comporte une ou plusieurs touffe(s) (27), agencée(s) radialement avec espacement mutuel dans le sens axial, et
    - des membrures d'un peigne de guidage (25), délimitant vers le haut le plan de convoyage, sont logées dans les espaces intercalaires situés entre des touffes (27).
  10. Dispositif selon l'une des revendications 6 ou 9, caractérisé par le fait que
    - le plateau de guidage (15) est réalisé sous la forme d'un plateau injecteur, auquel cas
    - il présente des orifices d'aspiration (39) dans sa région antérieure et
    - un tube injecteur (36) est placé au-dessous des orifices d'aspiration.
  11. Dispositif selon la revendication 10, caractérisé par le fait que le plateau de guidage (15), réalisé sous la forme d'un plateau injecteur,
    - comprend des plaques supérieure et inférieure (34, 35),
    - les orifices d'aspiration (39) étant pratiqués dans la plaque supérieure (34),
    - les plaques supérieure et inférieure (34, 35) formant, à l'extrémité postérieure, un interstice d'insufflation (38)
    - dont la direction d'insufflation est orientée, dans la direction du convoyage, au-dessus d'un plateau d'empilement (18) du dispositif d'empilement,
    - le tube injecteur (36) étant interposé entre les plaques supérieure et inférieure (34, 35), transversalement par rapport à la direction du convoyage, et
    - présentant des orifices (40) sur sa face orientée dans la direction du convoyage.
  12. Dispositif selon l'une des revendications 1 à 11, caractérisé par le fait qu'il forme un ensemble structurel unitaire conjointement à un sectionneur transversal.
EP94913583A 1993-05-05 1994-04-13 Dispositif permettant de transferer et d'empiler des feuilles Expired - Lifetime EP0697989B1 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
DE9306740U DE9306740U1 (de) 1993-05-05 1993-05-05 Vorrichtung zum Schuppen und Ablegen von Bogen auf einen Stapel
DE19934314756 DE4314756C2 (de) 1993-05-05 1993-05-05 Vorrichtung zum Schuppen und Ablegen von Bogen auf einen Stapel
DE4314756 1993-05-05
DE9306740U 1993-05-05
PCT/EP1994/001134 WO1994025384A1 (fr) 1993-05-05 1994-04-13 Dispositif permettant de transferer et d'empiler des feuilles

Publications (2)

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

Family

ID=25925581

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94913583A Expired - Lifetime EP0697989B1 (fr) 1993-05-05 1994-04-13 Dispositif permettant de transferer et d'empiler des feuilles

Country Status (5)

Country Link
US (1) US5611529A (fr)
EP (1) EP0697989B1 (fr)
JP (1) JP3115325B2 (fr)
DE (1) DE59401047D1 (fr)
WO (1) WO1994025384A1 (fr)

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US5950510A (en) * 1995-06-29 1999-09-14 Scheffer, Inc. Decelerating mechanism for printed products
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US6295922B1 (en) 2000-03-09 2001-10-02 Nu-Tech Printing Machinery, Inc. In-line finishing stacker with unloading pusher apparatus
DE10139405A1 (de) * 2001-08-17 2003-02-27 Jagenberg Querschneider Gmbh Vorrichtung zum Querschneiden von Materialbahnen, insbesondere Papier- oder Kartonbahnen
JP2005112630A (ja) * 2003-09-17 2005-04-28 Ricoh Co Ltd シート搬送装置及びそれを備える画像形成装置、画像読取装置、後処理装置
CN1854045B (zh) * 2005-04-28 2010-04-14 海德堡印刷机械股份公司 印刷机的具有页张制动器的收纸装置以及印刷机
DE202012013617U1 (de) 2012-04-27 2018-08-24 Bw Papersystems Stuttgart Gmbh Vorrichtung zum Schuppen und Ablegen von Bögen auf einen Stapel
JP6505184B2 (ja) * 2017-09-29 2019-04-24 株式会社プレッシオ 紙葉類取り出し装置
DE102019102775A1 (de) * 2019-02-05 2020-08-06 Koenig & Bauer Ag Bogenbearbeitungsmaschine mit Formgebungseinrichtung und oberem Saugtransportmittel
DE102019102774A1 (de) 2019-02-05 2020-08-06 Koenig & Bauer Ag Bogenauslage, eine Bogenbearbeitungsmaschine und ein Verfahren zum Betreiben einer Bogenbearbeitungsmaschine

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Also Published As

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

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