EP0503530A1 - Vorrichtung zur Bildung einer Folge von sich unterschuppenden Gegenständen - Google Patents

Vorrichtung zur Bildung einer Folge von sich unterschuppenden Gegenständen Download PDF

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Publication number
EP0503530A1
EP0503530A1 EP92103991A EP92103991A EP0503530A1 EP 0503530 A1 EP0503530 A1 EP 0503530A1 EP 92103991 A EP92103991 A EP 92103991A EP 92103991 A EP92103991 A EP 92103991A EP 0503530 A1 EP0503530 A1 EP 0503530A1
Authority
EP
European Patent Office
Prior art keywords
suction
belts
speed
belt
designed
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.)
Withdrawn
Application number
EP92103991A
Other languages
German (de)
English (en)
French (fr)
Inventor
Klaus Dr. Mank
Luitpold Klüber
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.)
Georg Spiess GmbH
Original Assignee
Georg Spiess 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
Application filed by Georg Spiess GmbH filed Critical Georg Spiess GmbH
Publication of EP0503530A1 publication Critical patent/EP0503530A1/de
Withdrawn legal-status Critical Current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
    • B65H29/66—Advancing articles in overlapping streams
    • B65H29/6609—Advancing articles in overlapping streams forming an overlapping stream
    • B65H29/6618—Advancing articles in overlapping streams forming an overlapping stream upon transfer from a first conveyor to a second conveyor advancing at slower speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00—Feeding articles separated from piles; Feeding articles to machines
    • B65H5/24—Feeding articles in overlapping streams, i.e. by separation of articles from a pile
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • a device of this type for forming a shingled arch path is known from DE 29 02 447.
  • the holding device consists of a suction box arranged above a simple conveyor belt arrangement.
  • the deflection device consists of a ratchet arranged below the transport plane of the conveyor belt arrangement, which between has fingers that can be passed through the individual bands.
  • An arrangement of this type requires a comparatively large arc spacing in order to avoid collisions between the high rake and the arc shooting into the inlet gap.
  • the known arrangement is therefore not suitable for high machine speeds.
  • Another, very particular disadvantage of the known arrangement is that the belts of the conveyor belt arrangement are simple conveyor belts on which the successive sheets merely rest.
  • the deflection device can therefore only come into action when the sheet in question has been gripped by a subsequent pulling device, for example in the form of a pair of pulling rollers, and has accordingly already been braked to the shingled stream speed.
  • the arches therefore no longer slow down here due to the holding device.
  • This danger is particularly great in the present case because the sheets are practically pushed by the conveyor belt arrangement on which they rest, running at a comparatively high speed.
  • the deflection device have a rocker that can be moved up and down in time with the arriving objects, on which at least one revolving suction element, preferably a plurality of suction elements that are uniformly distributed over the width, is or are accommodated, which can be or are driven uniformly.
  • a further advantageous measure can consist in that the suction member or the suction members can be driven at a speed that falls below the maximum speed of the engagement means by 5 to 10% and that an overrunning clutch is provided in the area of the drive device.
  • a further advantageous embodiment can consist in the fact that the suction elements are designed as suction belts, the suction-active lower run of which is convex downwards, preferably bent in a V-shape.
  • a further, particularly preferred measure can consist in the belts of the towing device being designed as suction belts which are only partially provided with suction holes over their circumference. These measures result in a particularly gently working and extremely simply constructed arrangement that does not require mechanical gripper means etc. Nevertheless, there is a reliable hold intervention.
  • Another advantage of the measures mentioned is that the objects transported by the towing device can be released relatively gently by simply reducing the suction cross-sections and / or reducing the vacuum.
  • the suction belts forming the towing device can be driven in a form-fitting manner, preferably in the form of a toothed belt with teeth going inwards. This measure ensures high accuracy despite the required acceleration and deceleration of the belts forming the towing device.
  • the towing device can expediently have a plurality of sets of belts which are laterally offset from one another and can be driven independently of one another and which can alternately be brought into engagement with the successive objects. Alternating use of this type advantageously simplifies the control of the drives and enables particularly high working speeds and short cycle times.
  • the towing device can have two shafts which can be driven separately from one another, on each of which drive wheels associated with a set of belts are fastened and deflection wheels assigned to the other set of belts are freely rotatably mounted.
  • the suction belts can expediently be raised in the area of their suction fields formed by the suction holes. This measure ensures that an object gripped by one set of tapes is so far removed from the other set of tapes that has been transported empty that there is no friction.
  • each suction belt can be assigned a suction channel, preferably formed by a hollow profile, which has a preferably central slot which communicates with the suction holes and is flanked by sealing strips which are located within lateral grooves for the lateral tooth rows of the suction belts, which are expediently provided in the area of the suction fields with widened surface recesses compared to the preferably centrally arranged suction holes.
  • the belts of the towing device can expediently be provided with their deflecting cams which protrude upwards and protrude from their engagement means.
  • a further expedient further development of the superordinate measures can consist in that the belts of the towing device are submerged on the outlet side under the transport plane of further conveying belts which are toothed and can be driven at a shingled stream speed, preferably designed as suction belts, and that a movable, preferably rotating stop is provided.
  • a sheet-processing machine such as a sheet-fed printing machine, is supplied with the sheet-like material in a manner known per se in the form of a shingled stream which arises during the processing of sheet stacks when the stack is being processed.
  • a paper web 2 is unwound from a roll 1, from which sheets 4 are cut off by means of a schematically indicated cross-cutting device, which sheets 4 are to be explained in more detail below Dandruff unit can be brought together to form a shingled stream 5 which, as indicated at 6, can be deflected and inserted into a sheet feeder which delivers the fed sheets in cycles to the sheet processing machine.
  • the above-mentioned scale unit has a frame 7 formed by lateral bars, on which two successively arranged, interlinked suction belt sections 8, 9 are received, on which the sheets 4 and the scale flow 5 are transported .
  • the transfer of the sheets takes place at Ü1 in the area of the rear deflection of the rear suction belt section 8.
  • the rear suction belt section 8 dips below the transport plane of the upper run of the front suction belt section 9.
  • the sheets are transferred from the rear conveyor belt section 8 to the front conveyor belt section 9.
  • a holding device Arranged above the rear suction belt section 8, which is active between Ü1 and S, is a holding device which cooperates with it and is formed here by a suction box 10 which is stationary during operation. This can be arranged so as to provide accessibility to the belts located below.
  • the suction box 10 is inclined forward here, so that there is a wedge-shaped space.
  • a suction box which is also arranged above the rear suction belt section 8 10 upstream sheet deflection device 11, which can be moved up and down in time with the incoming sheet generated by the cross-cutting device 3 and through which the rear end of a sheet 4 transported by the belts of the rear suction belt section 8 can be raised and brought into engagement with the suction box 10 .
  • the rear area of the sheet 4 in front thus overlaps the front area of the respective subsequent sheet 4 what is called shingling.
  • the rear suction belt section 8 functions as a towing device, the belts 13 of which record the incoming sheets at Ü1 in the region of their front edge and transport them away to the transfer point S in the transport direction indicated by an arrow in FIG.
  • the sheets 4 are not pushed from behind, but practically pulled from the front.
  • the belts 13 of the rear suction belt section which run with their upper run on a respectively assigned suction channel 14, as can best be seen from FIG. 5, are only partially provided with suction holes 15 over their circumference. Accordingly, these form suction hole fields 16 of approximately 100 mm in length, which act as engagement or towing elements of the rear suction belt section 8.
  • a plurality of suction hole fields 16, evenly distributed over the circumference can be provided.
  • the sheets 4 can, as soon as their front edge region is drawn, the deflection device 11 has passed, is lifted by the latter and, with its area adjoining the front area held by means of a suction hole field 11, is first brought into engagement with the support members of the deflection device 11 and then with the holding device formed by the suction box 10. Accordingly, the arches 4 are simultaneously in engagement with the towing device formed by the rear suction belt section 8 and the deflection device 11 or the holding device arranged downstream thereof and formed by the suction box 10. This interaction of the towing device and the deflection device or holding device enables the formation of the inlet gap 12 and the shooting in of the following sheet at a relatively high speed.
  • the belts 17 of the front suction belt section 9 are driven with the comparatively slow, constant scale flow speed.
  • the drive is, as indicated in FIG. 3 at 18, derived from the cross-cutting device 3 and transmitted via a gear 19 with a downstream longitudinal shaft 20 arranged on one side of the frame 7 to a deflection shaft 21, on which rollers 17 assigned to the belts are fastened , as indicated at 22.
  • the upper run of the belts 17 of the front suction belt section 9 runs between the interface S and the front belt deflection on respectively assigned suction channels 23 which, like the suction channels 14 of the rear suction belt section 8 and the suction box 10 and the deflection device 11, are connected to a suitable vacuum source.
  • the tapes 17 of the Front suction belt section 9 are provided with suction holes over their entire circumference and are accordingly suction-active over the entire length of their section under which the respective suction channel 23 is engaged, which ensures reliable conveyance of the scale flow 5 resting thereon.
  • the belts 13 of the rear suction belt section 8 are not driven at a constant speed, but rather at a variable speed, namely in the form of a speed profile with constant activation of suction hole fields 16 between the activation of successive suction hole fields 14 in the region of the rear end of the assigned suction channels 14 Periods.
  • the suction hole fields 16 of the belts 13, which act as engagement means, have the inlet speed of the sheets 4 at d1, ie. H. the speed of the paper web 2. Then, in order to achieve a larger sheet spacing, there is an acceleration to a maximum speed which is maintained beyond the front end of the assigned suction channels 14 up to the interface S.
  • the belts 13 are then moved further at such a speed that the next suction hole field 16 arrives at the same time as the respectively assigned sheet in the area of U1.
  • the rear suction belt section 8 In order to avoid dead times and to enable a high working speed, the rear suction belt section 8, as can best be seen in FIG. 3, consists of two pairs of belts 13a, 13b, their suction hole fields 16 and, accordingly, their speed profiles are offset against each other so that the successive sheets 4 are alternately gripped by one or the other pair of tapes 13a or 13b.
  • a separate drive motor 24a or 24b is assigned to each pair of belts 13a or 13b, as FIG. 3 further shows.
  • the two drive motors 24a, b can be controlled by means of a respectively assigned control line 25a or 25b in such a way that the desired speed profile and the desired profile offset are achieved.
  • the drive motors 24a, b mentioned are each connected to a shaft 26 or 27, which receives the rear or front deflection members of the belts 13a, b.
  • the deflection members assigned to a set of straps are fastened, as indicated at 28, and the deflection members assigned to the respective other set of straps are freely rotatably supported, as indicated at 29.
  • the deflection members fastened on the respectively assigned shaft act as drive wheels, the freely rotatably mounted deflection members as deflection wheels.
  • the bands of the rear suction band section 8 have one in the area of their suction hole areas 16, as can be seen from FIG Elevation 30. This ensures that the other tapes running at relative speed to the sheet 4 resting on the elevation 30 do not graze on the underside of the sheet.
  • each elevation 30 is preceded by a deflection cam 31, which lifts the preceding sheet, so that in the event of a sag these leading sheets collide with the in the inlet gap 12, the subsequent sheet is omitted.
  • the belts 13, as can also be seen from FIG. 5, are designed as toothed belts with inwardly directed teeth 32.
  • the drive wheels or deflection wheels are accordingly designed as toothed belt wheels 33.
  • the outside of the band opposite the teeth 32 functions as a flat contact surface.
  • suction holes 15 are provided only in the area of the belt center, which communicate with a central slot 34 of the associated suction channel 14 formed by a hollow profile 35.
  • widened surface recesses 36 are provided in the area of the suction hole areas 15, into which the suction holes 15 open.
  • the slot 34 is delimited by lateral sealing strips 37, on which the respectively assigned band 13 runs.
  • the sealing strips 37 can be provided with expansion grooves 38. Outside the sealing strips 37 there are lateral grooves 39 for the teeth 32 of the belts 13. These go accordingly not across the bandwidth, but form two rows of teeth on the outside. Of course, it would also be conceivable to provide a central row of teeth running in a central running groove which is delimited to the outside by two sealing strips. In this case, there is a larger tooth width. At the same time, running resistance increases.
  • the suction channels 14, like the suction box 10 and the deflection device 11 and the suction channels 23, are each connected to a vacuum source via a connecting line 40.
  • the length of the suction channels 14 or their slots 34 corresponds to the engagement distance of the suction hole fields 16 of the belts 13, which act as engagement means.
  • the suction holes 15 pass over the front end of the respectively assigned suction channel 14, the arc 4 gripped by the relevant suction hole field 16 is released.
  • the vacuum loading of the suction holes can be reduced over the length of the slots 34.
  • the suction channels 14 can be divided into several chambers arranged one behind the other or, as in the exemplary embodiment shown, the slots 34 can simply be narrowed over their length.
  • the suction box 10 functioning as a holding device, which is indicated by dash-dotted lines as in FIG. 2.
  • the deflection device 11 is adjustable depending on the format together with the associated deflection device 11 is set so that the distance of its front edge or the front edge of its lower suction surface from the front end of the slots 34 has a distance which is approximately the length of each processed format.
  • the front bow end held by the belts 13 is released, the rear bow end which is in engagement with the suction box 10 is accordingly also released.
  • the vacuum in the suction channels 14 and in the suction box 10 is set so that the residual tensile force acting towards the end of the engagement path, which is still acting on the front end of the bow, is just sufficient to pull the rear region of the bow in question from the suction box 10, which at the same time acts as a braking device acts.
  • the sheet 4 drawn off from the suction box 10 accordingly only has a low residual speed at which it is transferred to the front suction belt section 9, which runs at the comparatively slow scale flow speed.
  • the belts 13 of the rear suction belt section act as simple carrying tapes, each of which lies on top of them Take the sheet with you by friction. In practice, however, this distance can be reduced to almost zero.
  • a rotating stop 41 is provided in the area of the interface S, as FIG. 2 further shows, which aligns the incoming sheets 4.
  • the rotating stop 41 consists of a driven roller 42 from which stop cams 43 projecting between the belts 13 and 17, the peripheral speed of which corresponds to the scale flow speed.
  • the roller As FIG. 3 shows, 42 is also driven by the longitudinal shaft 20.
  • the position of the stop device 41 is independent of the format. In the event of a change in format, as is indicated in FIG. 2 by dash-dotted lines, only the suction box 10 functioning as a holding device and the deflection device 11 assigned to it are adjusted.
  • the suction box 10 and the deflection device 11 are received on a slide 44 which is guided on the side rails of the frame 7 and is adjustable by means of lateral adjusting spindles 45 which can be driven by means of a shaft 47 provided with a handwheel 46.
  • the deflection device 11 has a rocker arm 48 which can be swiveled up and down in time with the incoming sheets 4 and has supporting elements which are received thereon and which can grasp and lift a sheet 4 from above moved at the maximum speed of the belts 13 in approximately the corresponding speed in the transport direction.
  • suction belts 49 are provided in the exemplary embodiment shown which are uniformly distributed over the width of the belt section. These are provided with suction holes over their entire circumference.
  • the lower run of the suction belts 40 runs over a suction box 50 provided with assigned openings, which is attached to the rocker 48 or formed as part of it and connected via a suction line 51 to a vacuum source, to which the suction line 52 of the stationary one is also connected Suction box 10 leads.
  • the front deflection members 53 of the suction belts 49 are received on a continuous shaft 54, on which the rocker 48 can also be pivoted, as indicated at 55.
  • the rear deflection members 56 of the suction belts 49 are resiliently received on the associated lugs of the rocker 48 in order to maintain the desired belt tension.
  • the frame forming the rocker 48 is moved up and down by laterally acting crank drives 57. These are connected via a belt transmission 58 to the shaft 54, which acts as drive wheels and accommodates the front deflection members 53 of the suction belts 49, which shaft can be driven from the longitudinal shaft 20 via a further transmission 59.
  • a sliding sleeve 60 adjustable with the slide 44 is received, which carries a bevel gear which meshes with a further bevel gear of an intermediate shaft of the countershaft 59.
  • the sliding sleeve 60 and the intermediate shaft 61 connected to it via the bevel gear train can be received on a bracket 62 projecting laterally from the slide 44.
  • the overall ratio is chosen so that the rocker 48 swings up and down in time with the incoming sheet 4 and that the suction belts 49 run at approximately the same speed at which the sheet 4 is moved when the suction belts 49 are in the lower position Swingarm 48 come into engagement with the rear end of the bow.
  • This is practically the maximum speed of the rear suction belt section 8, which acts as a towing device.
  • the drive speed should be of the suction belts 49 of the deflection device 11 may be approximately 5 to 10% less than the maximum speed of the belts 13 of the rear suction belt section 8.
  • overrunning clutches 63 are installed between the shaft 54 and the deflection members 53 accommodated thereon, which act as drive wheels. As a result, it is possible that the belts 49 can be accelerated beyond their driving speed via the sheets detected thereby, which leads to a sheet tightening in the longitudinal direction.
  • the suction box 50 is designed such that the lower run of the suction belts 49 running over it is angled convexly downward, here downward in a V-shape.
  • the mutual inclination of the adjoining belt sections is selected such that the rear section, as shown in FIG. 7, is approximately parallel to the transport plane of the rear suction belt stretch 8 in the lower position of the rocker 48 and that the front section, as best shown in FIG. 4 It can be seen in the upper position of the rocker 48 is approximately parallel to the lower suction surface of the stationary suction box 10, which acts as a holding device. In any case, there is accordingly a comparatively long engagement distance and thus a reliable hold.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
EP92103991A 1991-03-15 1992-03-09 Vorrichtung zur Bildung einer Folge von sich unterschuppenden Gegenständen Withdrawn EP0503530A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9103137U 1991-03-15
DE9103137U DE9103137U1 (de) 1991-03-15 1991-03-15 Vorrichtung zur Bildung einer Folge von sich unterschuppenden Gegenständen

Publications (1)

Publication Number Publication Date
EP0503530A1 true EP0503530A1 (de) 1992-09-16

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EP92103991A Withdrawn EP0503530A1 (de) 1991-03-15 1992-03-09 Vorrichtung zur Bildung einer Folge von sich unterschuppenden Gegenständen

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DE (1) DE9103137U1 (xx)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757450A3 (de) * 2005-08-17 2008-07-30 manroland AG Bogendruckmaschine
US11352232B2 (en) * 2017-06-14 2022-06-07 Bw Papersystems Stuttgart Gmbh Apparatus and method for positionally defined transport of sheets

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10103040B4 (de) * 2000-05-16 2007-05-24 Heidelberger Druckmaschinen Ag Verfahren zur Bildung einer Folge von unterlappten Bögen

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852256A (en) * 1955-09-09 1958-09-16 Milprint Inc Art of delivering flexible sheets
US3595564A (en) * 1968-05-15 1971-07-27 North American Rockwell Apparatus for handling sheets
DE2638783A1 (de) * 1976-08-27 1978-03-02 Spiess Gmbh G Bogenanleger
GB2025372A (en) * 1978-06-29 1980-01-23 Hamilton Tool Co Method of and device for underlap feeding of sheet-like articles
GB1577158A (en) * 1978-05-04 1980-10-22 Carlaw Ltd D Apparatus for changing a flow of envelopes in spaced apart succession into a slower flow of envelopes in overlapping succession

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2852256A (en) * 1955-09-09 1958-09-16 Milprint Inc Art of delivering flexible sheets
US3595564A (en) * 1968-05-15 1971-07-27 North American Rockwell Apparatus for handling sheets
DE2638783A1 (de) * 1976-08-27 1978-03-02 Spiess Gmbh G Bogenanleger
GB1577158A (en) * 1978-05-04 1980-10-22 Carlaw Ltd D Apparatus for changing a flow of envelopes in spaced apart succession into a slower flow of envelopes in overlapping succession
GB2025372A (en) * 1978-06-29 1980-01-23 Hamilton Tool Co Method of and device for underlap feeding of sheet-like articles

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1757450A3 (de) * 2005-08-17 2008-07-30 manroland AG Bogendruckmaschine
US11352232B2 (en) * 2017-06-14 2022-06-07 Bw Papersystems Stuttgart Gmbh Apparatus and method for positionally defined transport of sheets

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Publication number Publication date
DE9103137U1 (de) 1991-06-13

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