EP0798251A2 - Convoyeur à succion - Google Patents

Convoyeur à succion Download PDF

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Publication number
EP0798251A2
EP0798251A2 EP97103855A EP97103855A EP0798251A2 EP 0798251 A2 EP0798251 A2 EP 0798251A2 EP 97103855 A EP97103855 A EP 97103855A EP 97103855 A EP97103855 A EP 97103855A EP 0798251 A2 EP0798251 A2 EP 0798251A2
Authority
EP
European Patent Office
Prior art keywords
suction
channel
transport
sheets
conveyor according
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Withdrawn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
EP97103855A
Other languages
German (de)
English (en)
Other versions
EP0798251A3 (fr
Inventor
Christian Hieb
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.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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 DE19649824A external-priority patent/DE19649824A1/de
Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0798251A2 publication Critical patent/EP0798251A2/fr
Publication of EP0798251A3 publication Critical patent/EP0798251A3/fr
Withdrawn legal-status Critical Current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
    • B65H11/00—Feed tables
    • B65H11/002—Feed tables incorporating transport belts
    • B65H11/005—Suction belts
    • 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
    • B65H29/16—Delivering or advancing articles from machines; Advancing articles to or into piles by contact of one face only with moving tapes, bands, or chains
    • 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
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/241—Suction devices
    • B65H29/242—Suction bands or belts
    • 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
    • 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 suction conveyor for transporting sheets with at least one transport strand which is operationally moved in a transport direction, to which the sheets can be placed, a carrier with a support surface which supports the at least one transport strand and a suction chamber arrangement which communicates with at least one suction opening and which is operatively disposed therein prevailing negative pressure generates a holding force pressing the sheets applied to the transport strand and exerts a throttling effect on a suction air flow passing through the suction opening.
  • Such a suction conveyor is known from the patent specification DD 247 433 A1.
  • a relatively high holding force is required with which the sheets are pressed against the transport strand.
  • successive suction cups which are connected to one another via throttle channels or throttle bores are embedded in the support surface towards the inside of the transport run and open in the transport direction.
  • suction cups and throttle ducts alternate several times in the transport direction, depending on their number. This results in abrupt fluctuations in the holding force when the transport strand, for example, guides a trailing edge of a sheet over the carrier.
  • the maximum possible holding force in a region of the sheet located between the leading and trailing edge of a sheet also results only in operating conditions in which the suction cups on the one hand and the suction openings on the other hand are congruent with the suction cups, with the diameter of the suction cups being essentially the same.
  • these operating states occur only very briefly and alternate Given geometry of the known suction conveyor with a frequency dependent on the rotational speed of the belt with operating states in which the holding force drops to a minimum value and increases to the maximum value mentioned.
  • the invention has for its object to design a generic suction conveyor so that adverse influences on the holding force are reduced for a safe guidance of the sheet transported with it.
  • the suction chamber arrangement has an interior in the form of a channel which extends in the transport direction and has channel sides formed by the carrier and the at least one transport strand, one of which faces at least partially open to a respective one of the sheets being applied, and which other channel sides with the exception of the at least one suction opening are closed.
  • the suction conveyor according to the invention provides a constant holding force in the case of a shingled sheet stream transported by means of this, and while the suction chamber arrangement is covered by means of a single sheet, a constant holding force acts on the respective sheet even when the single sheet is transported.
  • the channel extends from the suction opening counter to the transport direction
  • the reason for this is that there is a flow around the trailing edge of the sheet when it is led over the suction chamber arrangement during transport of the sheet by means of the transport strand.
  • the suction conveyor can in particular be used to feed sheets of a shingled sheet stream drawn off from a stack to front marks of a feeder of a sheet printing machine.
  • the suction conveyor is operated at a non-uniform rotational speed of the at least one transport run, it is particularly suitable as a sheet brake in the delivery arm of such a machine.
  • Use in this delivery can also take place in such a way that operation with a uniform circulation speed is occasionally provided for the duration of at least one machine cycle instead of an operation with a non-uniform one, which speed corresponds to the speed at which the sheets are fed through the machine.
  • at least one sheet can occasionally be advantageously transported as a test sheet over a stack in the delivery which is otherwise formed by braked sheets.
  • a single endless flat belt 1 wraps around a drive roller 2 and a deflection roller 3, which rotate in the direction of rotation indicated by the direction of rotation arrow 4, so that the belt 1 rotates during operation and with one in the Fig 1 above the drive roller 2 and the deflection roller 3 section thereof forms a transport run 5 which moves during the rotation in the transport direction indicated by the direction of rotation arrow 6.
  • a sheet 7 which can be placed on the transport strand 5 and is to be transported is shown in a phase of the transport in which the trailing edge of the sheet 7 is already on the transport strand 5.
  • a carrier 8 is placed between the drive roller 2 and the deflection roller 3.
  • a support surface 9 facing the transport run 5 is formed on this, which is coated from the inside of the transport run 5.
  • the carrier 8 and the transport strand 5 covering the supporting surface 9 together form a suction chamber arrangement 11.
  • This has an interior space in the form of a channel 16 which can be seen in longitudinal section in FIG. 1 and which extends in the transport direction in accordance with the direction of rotation arrow 6.
  • a channel side of the channel 16 facing the arch 7 is formed in the present example by means of the transport run 5 of the belt 1, which overlaps the channel 16 transversely to the transport direction and has suction openings 14 communicating with the interior of the channel 16, so that this channel side is partially open.
  • the remaining channel sides are closed except for a suction opening 13 and, in the present example, are formed by means of a recess embedded in the support surface 9.
  • the channel 16 or 16 ' has a cross section in the form of a gap 17 or 17' on which between the channel bottom 16.1 or 16'.1 and the transport strand has a gap height h which is many times smaller than the width b of the Channel 16 or 16 '. These dimensions are chosen so that the channel 16 or 16 'proves to be a throttle section for a suction air flow passing through the suction opening 13.
  • FIG. 3 shows, with regard to the channel 16 or 16 ', its basic design in accordance with an exemplary embodiment, but without claiming to reproduce the true size relationships required to form the channel 16 or 16' as said throttle section. This also applies to the other figures.
  • the gap 17 or 17' forming its cross section is bordered and hatched with dash-dotted lines.
  • the suction opening 13 opens into a channel side of the channel 16 which represents a channel bottom 16.1 and is connected to a vacuum source 18 via a suction line 12. If the vacuum in the suction chamber arrangement 11, that is to say in the channel 16, can be generated operationally, this acts on the suction openings 14 provided in the transport run 5 on a respective sheet 7 applied to the transport run 5 and exerts a holding force thereon which exerts this on the transport run 5 presses. In this case, a transport run 5 provided with the suction openings 14 is available during the complete circulation of the belt 1 forming this transport run 5 if, contrary to the drawing in FIG. 1, the belt 1 is equipped with the suction openings 14 along its entire length.
  • two transport strands 5 ′ are arranged at a mutual lateral distance a and are driven synchronously, which in turn form a suction chamber arrangement 11 ′ together with the carrier 8 ′, the interior of which forms the channel 16 ′′ in forms the meaning set out.
  • the gap 17 ′′ representing the cross section of the channel 16 ′′ is in turn bordered and hatched with dash-dotted lines. This cross section is overlapped with the exception of the distance a from the two transport strands 5 ', so that the channel side facing a sheet 7 placed on the transport strands 5' (not shown here) is partially open.
  • the remaining channel sides, except for a suction opening 13 ', are in turn represented by a recess embedded in the support surface 9, which in particular forms a channel floor 16''. 1, into which the suction opening 13' communicating with a suction line 12 'opens.
  • the operating pressure prevailing in the suction chamber arrangement 11 takes effect via the suction openings 14 of the transport run 5 there on a sheet 7 attached to it
  • this takes place according to the example according to FIG. 4 via the slot existing between the two transport strands 5' with a width corresponding to the distance a, this slot extending along the channel 16 ′′.
  • two transport strands 5 ′′ are arranged at a mutual distance a ′ and driven synchronously. Together with the carrier 8 ′′, these form a suction chamber arrangement 11 ′′, the interior of which in this case forms a channel 16 ′′ ′′, in which the channel side facing a sheet 7 placed on the transport strands 5 ′′ does not partially, as in the examples described above is open but completely open.
  • the transport strands 5 ′′ here have, by way of example only, a circular cross section and form closed lateral channel sides, while a channel floor 16 ′′ ′′ that surrounds the suction opening 13 ′′ and is otherwise closed is represented by part of the support surface 9.
  • a suction line 12 ′′ opens with the suction opening 13 ′′ into the channel bottom 16 ′′ ′′. 1.
  • this is not mandatory in particular in those exemplary embodiments in which the channel sides which are open except for an intake opening are formed by means of a recess embedded in the supporting surface; there, suction openings can also open, for example, in channel sides that laterally delimit the channel.
  • the gap height h 'of the channel 16' '' is determined by the diameter of the circular cross section of the transport strands 5 '' here, while the width b 'of the channel 16' '' here at its narrowest point is the distance a 'corresponds.
  • the support surface 9 forms a channel floor 16 ′′ ′′. 1, into which the suction opening 13 ′′ ′′ opens.
  • the transport strand 5 ''' is, according to FIG. 1, supported on the support 8''' trained support surface 9 guided and driven. 1, 3 and 4 a recess 16 forming a channel 16 '''' is provided in the transport run 5 '''.
  • the recess faces the channel floor 16 ′′ ′′. 1 and extends in the transport direction.
  • the transport run 5 ′′ ′′ is provided with suction openings 14, so that the channel side facing a sheet 7 applied to the transport run 5 ′′ ′′ is again partially open.
  • the rest of the channel sides, except for the suction opening 13 ''', are formed partly on the support 8''' in the form of the channel bottom 16 ''''. 1 and partly on the transport run 5 '''in the form of lateral channel sides, which are the ones in the transport run 5 '''Limit the provided recess laterally.
  • the respective channel of the exemplary embodiments described so far preferably has at least one closed end face and the at least one suction opening is arranged at one end of the respective channel.
  • the suction opening 13 is arranged at one end of the channel 16 such that the channel 16 extends from this suction opening against the transport direction, and in particular the end of the channel 16 assigned to this suction opening has a closed end face.
  • the sheet 7 gives an upstream part of the sheet 7 facing the rear edge thereof - here as a result of the suction openings 14 provided in the transport run 5 - partially open channel side free and covers the suction opening 13.
  • the arch 7 "runs off".
  • the suction opening 13 is connected operationally to the vacuum source 18, the flow around the trailing edge of the sheet 7, as described above, results as a result of the suction air flow leading into the suction opening 13 in the channel 16.
  • the channel side facing the arch 7 is partially open or completely open and according to which of the described exemplary embodiments the channel is designed.
  • the formation of the suction air flow mentioned has a favorable effect in that the end face of the channel 16 which is directly adjacent to the suction opening 13 is closed.
  • the mode of operation of the suction conveyor according to the invention is illustrated using the example of FIG. 1 using the associated diagram according to FIG. 2.
  • the abscissa represents the extent of the transport run 5 or of the channel 16 and the ordinate represents the negative pressure ⁇ p in the throttle section formed by means of the gap-shaped channel 16, in which, in the phase of the sheet transport shown in FIG. 1, due to an operation in the suction line 12 prevailing negative pressure sets the suction air flow in the direction of the suction opening 13.
  • This suction air flow is caused by the negative pressure gradient prevailing in the channel 16, represented qualitatively by the line 21, between the suction opening 13 and the instantaneous distance 22 of the trailing edge of the sheet 7 from the suction opening 13.
  • the negative pressure ⁇ p1 which arises in the distance 22 mentioned is determined by causes the flow around the trailing edge of the arc, as already explained above.
  • the support 8 ′′ ′′ forming the support surface 9 is represented by a suction box arrangement.
  • This comprises two suction boxes 8.1 and 8.2 which follow one another in the longitudinal direction of the transport run 5 '' '', to each of which a suction line 12.1 or 12.2 is connected.
  • the channel side of the channel 160 facing the bend 7 is formed by the transport run 5 ′′ ′′, which is provided with suction openings 14. This channel side is again of the partially open type.
  • the remaining channel sides, including the end faces of the channel 160, are again formed by means of a recess embedded in the support surface 9 and closed except for two suction openings 13.1 and 13.2, each of which is assigned to a respective end of the channel 160 and the interior of a respective one of the suction boxes 8.1 and 8.2 connects to channel 160.
  • the sheet 7 applied to the transport run 5 '''' releases a downstream part of the channel 7 facing the sheet 7 and which is partially open due to the suction openings 14 and covers the suction opening 13.1 from which the channel 160 extends in the transport direction according to the direction of rotation arrow 6.
  • Sheet 7 "runs on”.
  • the pressure in the channel 16 corresponds to the pressure conditions in the channel 16 described above with reference to FIG. 2, wherein only the suction air flow is directed in the opposite direction and the leading edge of the sheet 7 is flowed around in the manner described.
  • the suction openings 13.1 and 13.2 can therefore preferably be connected independently of one another to a vacuum source 18. In the example shown in FIGS. 7 and 8, this is achieved in that a respective one of the suction lines 12.1 and 12.2 communicating with each of the suction openings 13.1 and 13.2 is connected to the vacuum source 18 via a valve 24.
  • These valves 24 are preferably controlled - by means of control means (not shown) - in dependence on the phases shown in FIGS. 7 and 8, such that that of the suction openings 13.1 and 13.2 is acted upon by a vacuum at which this is generated in order to generate a Holding force on the sheet 7 causes an effect.
  • FIG. 9 A preferred use of the suction conveyor explained so far is shown in FIG. 9.
  • a rotary offset printing machine is provided as an example, of which a printing unit 100 and a feeder 101 feeding the sheets 7 are shown schematically.
  • the feeder 101 removes the sheets 7 by means of a separating device 102 from a stack 103 formed from the sheets 7 and transfers them to the transport run 105 of the suction conveyor, which is denoted here overall by 104. This transports the separated sheets 7 to a transfer device 106.
  • this comprises a pre-gripper that swings back and forth in time with the sheet processing between a feed table and a feed drum, which grips the sheets 7 aligned on the feed table at a gripper edge thereof and at one of them Feeder provided gripper system passes.
  • FIG. 10 Another preferred use of the suction conveyor is shown in FIG. 10. This is also the use of the suction conveyor, designated here overall by 104 ', in a printing machine that processes the sheets. From this, a printing unit 108 operating in the offset process and a subsequent delivery 109 are shown schematically.
  • This comprises a sheet conveyor 110 in the form of a chain conveyor circuit with rotating gripper systems 111, which take over the sheets 7 operationally from the impression cylinder 112 of the printing unit 108 and transfer them at machine speed to the transport run 105 'of the suction conveyor 104', which is only shown schematically.
  • the suction conveyor 104 ' is arranged upstream with respect to the transport direction of the sheets 7 with respect to a delivery stack 113, and it transports the sheets 7 after their release by the gripper systems 111 at a selected speed profile of the transport run 105'.
  • the speed curve can be selected in such a way that the sheets 7 are braked to a depositing speed in a first case of machine speed, with which they are then transferred to the delivery stack 113, while in a second case they are conveyed beyond the delivery stack 113 to a sample sheet delivery (not shown) will.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Belt Conveyors (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
  • Advancing Webs (AREA)
EP97103855A 1996-03-28 1997-03-07 Convoyeur à succion Withdrawn EP0798251A3 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19612301 1996-03-28
DE19612301 1996-03-28
DE19649824 1996-12-02
DE19649824A DE19649824A1 (de) 1996-03-28 1996-12-02 Saugförderer

Publications (2)

Publication Number Publication Date
EP0798251A2 true EP0798251A2 (fr) 1997-10-01
EP0798251A3 EP0798251A3 (fr) 1998-01-07

Family

ID=26024223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97103855A Withdrawn EP0798251A3 (fr) 1996-03-28 1997-03-07 Convoyeur à succion

Country Status (3)

Country Link
EP (1) EP0798251A3 (fr)
JP (1) JPH1017178A (fr)
CZ (1) CZ72197A3 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102595A1 (fr) 2001-06-15 2002-12-27 Koenig & Bauer Aktiengesellschaft Dispositif de controle de la qualite
DE102008034266A1 (de) 2007-07-31 2009-02-05 Kay-Olaf Kock Vorrichtung zum Drehen einer Teilmenge von Produkten
WO2012052092A1 (fr) * 2010-10-22 2012-04-26 Bielomatik Leuze Gmbh + Co. Kg Dispositif de freinage de feuilles
DE102011115297A1 (de) * 2011-09-29 2013-04-04 Robert Nyblad Gmbh Saugbremsvorrichtung sowie dazugehöriges Steuerverfahren
CN103359318A (zh) * 2013-08-02 2013-10-23 哈尔滨博实自动化股份有限公司 气浮式空袋整理输送装置

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19960351A1 (de) * 1999-12-14 2001-06-21 Heidelberger Druckmasch Ag Bogenbremssystem für einen Ausleger einer Bogen verarbeitenden Maschine
JP5066780B2 (ja) * 2003-07-16 2012-11-07 トヨタ自動車株式会社 燃料電池の電極触媒層形成装置
JP6186906B2 (ja) * 2012-09-18 2017-08-30 株式会社リコー 画像形成装置

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1625642A (en) * 1924-04-08 1927-04-19 Michael A Droitcour Method and mechanis for delivering and stacking sheets
DE713529C (de) * 1938-11-05 1941-11-13 Koenig Werk G M B H Maschf Bogenfoerdervorrichtung, insbesondere an Bogenanlegern fuer Buchdruck- und aehnlicheMaschinen
FR1261533A (fr) * 1959-06-30 1961-05-19 Stabilimento Di Arti Grafiche Appareil transporteur de feuilles pour machines à imprimer
FR2294962A1 (fr) * 1974-12-20 1976-07-16 Heidelberger Druckmasch Ag Dispositif d'acheminement de feuille pour machine a imprimer
DD247433A1 (de) * 1986-04-01 1987-07-08 Polygraph Leipzig Bandfoerderer in bogenauslegern von druckmaschinen
EP0324545A1 (fr) * 1988-01-13 1989-07-19 Xerox Corporation Alimentation à courroie multiple pour des documents

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1625642A (en) * 1924-04-08 1927-04-19 Michael A Droitcour Method and mechanis for delivering and stacking sheets
DE713529C (de) * 1938-11-05 1941-11-13 Koenig Werk G M B H Maschf Bogenfoerdervorrichtung, insbesondere an Bogenanlegern fuer Buchdruck- und aehnlicheMaschinen
FR1261533A (fr) * 1959-06-30 1961-05-19 Stabilimento Di Arti Grafiche Appareil transporteur de feuilles pour machines à imprimer
FR2294962A1 (fr) * 1974-12-20 1976-07-16 Heidelberger Druckmasch Ag Dispositif d'acheminement de feuille pour machine a imprimer
DD247433A1 (de) * 1986-04-01 1987-07-08 Polygraph Leipzig Bandfoerderer in bogenauslegern von druckmaschinen
EP0324545A1 (fr) * 1988-01-13 1989-07-19 Xerox Corporation Alimentation à courroie multiple pour des documents

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
J.J.BURNARD: "FLOW REDUCTION ON GATED TRANSPORTS" XEROX DISCLOSURE JOURNAL., Bd. 9, Nr. 2, April 1984, STAMFORD, CONN US, Seiten 119-120, XP002045355 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002102595A1 (fr) 2001-06-15 2002-12-27 Koenig & Bauer Aktiengesellschaft Dispositif de controle de la qualite
DE10128833A1 (de) * 2001-06-15 2003-01-02 Koenig & Bauer Ag Qualitätskontrollvorrichtung
US6877427B2 (en) 2001-06-15 2005-04-12 Koenig & Bauer Aktiengesellschaft Quality control device
DE10128833B4 (de) * 2001-06-15 2006-11-02 Koenig & Bauer Ag Qualitätskontrollvorrichtung
DE102008034266A1 (de) 2007-07-31 2009-02-05 Kay-Olaf Kock Vorrichtung zum Drehen einer Teilmenge von Produkten
DE102008034266B4 (de) * 2007-07-31 2010-09-30 Kay-Olaf Kock Vorrichtung zum Drehen einer Teilmenge von Produkten
WO2012052092A1 (fr) * 2010-10-22 2012-04-26 Bielomatik Leuze Gmbh + Co. Kg Dispositif de freinage de feuilles
DE102011115297A1 (de) * 2011-09-29 2013-04-04 Robert Nyblad Gmbh Saugbremsvorrichtung sowie dazugehöriges Steuerverfahren
CN103359318A (zh) * 2013-08-02 2013-10-23 哈尔滨博实自动化股份有限公司 气浮式空袋整理输送装置

Also Published As

Publication number Publication date
CZ72197A3 (en) 1997-12-17
JPH1017178A (ja) 1998-01-20
EP0798251A3 (fr) 1998-01-07

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