EP0680908A1 - Dispositif pour adapter la dépression dans une table de guidage d'une bande sous vide d'un dispositif d'alimentation en feuilles - Google Patents

Dispositif pour adapter la dépression dans une table de guidage d'une bande sous vide d'un dispositif d'alimentation en feuilles Download PDF

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Publication number
EP0680908A1
EP0680908A1 EP95105620A EP95105620A EP0680908A1 EP 0680908 A1 EP0680908 A1 EP 0680908A1 EP 95105620 A EP95105620 A EP 95105620A EP 95105620 A EP95105620 A EP 95105620A EP 0680908 A1 EP0680908 A1 EP 0680908A1
Authority
EP
European Patent Office
Prior art keywords
suction
shut
sheet
chambers
suction nozzle
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.)
Granted
Application number
EP95105620A
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German (de)
English (en)
Other versions
EP0680908B1 (fr
Inventor
Burkhard Maass
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
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Heidelberger Druckmaschinen AG
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Filing date
Publication date
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Application filed by Heidelberger Druckmaschinen AG filed Critical Heidelberger Druckmaschinen AG
Publication of EP0680908A1 publication Critical patent/EP0680908A1/fr
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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
    • 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
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/321—Suction belts integral in feed table
    • 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 for adapting the negative pressure in a suction belt feed table of a sheet feeder to operating conditions which change during the sheet conveyance, with at least one endless, drivable conveyor belt, which is provided with suction openings, with a side alignment device for lateral alignment of the foremost sheet in each case shingled sheet stream and with a suction box arranged below a conveying plane, which, viewed in the sheet conveying direction, is divided into several chambers which can be subjected to negative pressure independently of one another.
  • a device for switching the suction effect is known from the prior art, the Japanese utility model disclosure Hei 4-91953.
  • An articulated actuating cylinder rotates an axis of rotation via a lever to which a flap with two sealing surfaces is attached. With the flap, either a connection to atmospheric pressure level or a connection to a vacuum source can be realized.
  • this device has the disadvantage that for realizing the switching a full 90 o swivel motion of the flap must be performed. The consequence of this is that, due to the inertia of the mass to be pivoted, a certain pivoting time is required. This means that there is no clearly defined switching state during the swivel time. At high Sheet conveying speeds therefore do not allow an abrupt, atmospheric ventilation of a suction chamber.
  • the conveyance of a shingled sheet stream on the feed table of a feeder of a sheet-fed rotary printing press can be divided into three phases.
  • the first phase can be characterized in that when the machine starts up, the first sheet, which is pushed onto the suction belt by the separating device, is to be sucked onto the perforated conveyor belt with as little slip as possible.
  • the suction power is fundamentally reduced by the fact that only a certain area of the conveyor belt is covered by the first sheet and thus a great deal of incorrect air is sucked in, and the suction effect is therefore limited.
  • the first phase is particularly critical when working with a small scale length both with and without drive rollers on the belt drive roller at the upper end of the feed table.
  • this second phase namely the conveyance of the shingled arc stream, which corresponds approximately to the steady or steady state of the system, the operating conditions are constant, which is why this second phase can be classified as unproblematic.
  • the third phase of the promotion of a shingled arc stream concerns the promotion of the last arc of the shingled arc stream.
  • This sheet is sucked onto the conveyor belt over its entire length and is thus fixed much more strongly on the conveyor belt than the partially overlapping sheets of the shingled sheet stream.
  • the overlapping of the individual sheets means that the sheets are only in contact with the conveyor belt with a fraction of their surface area, and consequently are subject to a lower suction effect. If the last sheet is transported against the front marks, it remains in the feed table exposed to prevailing negative pressure, on the one hand the front edge of the last sheet can be pressed in on the front marks and on the other hand the lateral alignment can be insignificantly impeded.
  • a device for conveying a shingled sheet stream to a sheet-processing machine is equipped with a conveyor table which contains a sensor system for detecting the last sheet.
  • the vacuum source of a vacuum box in front of the front marks is switched off after a period of time corresponding to the conveying time of the number of sheets preceding the last sheet, and the vacuum box is instead pressurized with an overpressure source.
  • this vacuum box in front of the front marks is subjected to an overpressure surge, the metering of which is at least difficult. If the pressure surge is too strong, the last sheet can literally be blown off the conveyor belt and do exactly the opposite of what was intended. Correct alignment then no longer appears possible.
  • this prior art solution requires an additional blown air connection.
  • the object of the invention is to adapt the negative pressure in the feed table of a sheet feeder to the respective operating phase.
  • this object is achieved in that a plurality of suction chambers are arranged in the conveyor plane below a conveyor belt, which have a pivotable Shut-off element can be selectively connected to a common suction nozzle.
  • the pivotable shut-off element is arranged in the plane of a boundary of the suction nozzle. In passive position, it therefore does not create any flow resistance in the suction nozzle and allows the suction air source to be dimensioned smaller.
  • the pivotable shut-off element is attached eccentrically to a pivot axis.
  • the shorter section of the pivotable shut-off element resulting from the eccentric bearing in relation to the pivot axis closes or opens a ventilation opening in a boundary wall of the suction nozzle.
  • the longer section of the shut-off element resulting from the eccentric bearing interrupts the connection of a suction chamber to the common suction nozzle.
  • the suction chambers are attached to trusses below the conveying level of the arc stream.
  • the crossbeams in turn are penetrated by openings which lie outside the pivoting range of the shut-off element.
  • the suction chambers, the respective suction channels of which are permanently connected to the common suction nozzle through the openings, are consequently permanently subjected to vacuum are and are not influenced by the pivoting movement of the shut-off element.
  • the pivotable shut-off element can be actuated both electromagnetically by means of an actuating cylinder which can be acted upon by a pressure medium.
  • FIG. 1 shows that a conveying plane 5 for supplying a sheet-fed rotary printing press has a plurality of suction chambers I, II, III, each of which is covered by curly brackets 1, 2, 3.
  • the suction chamber I is located directly after a belt drive roller 8, behind a pivotable stop 6 of a feeder stack 4.
  • the front suction chamber I extends to a first web 12 below the conveying plane 5.
  • This is followed by a middle suction chamber II which adjoins extends to a pulling roller 10 of a side alignment device.
  • a rear suction chamber III is formed, which is separated from the middle suction chamber II by a sheet metal part.
  • the front marks 11 are arranged behind the conveying plane 5, on which the individual sheets are aligned.
  • An endless perforated conveyor belt 9 runs around the suction chambers I, II, III and is driven by a belt drive roller 8, above which clock rollers 7 are arranged.
  • the clock rollers 7 are used to ensure that the first sheet is conveyed with as little slip as possible while the vacuum in the suction chamber I is still reduced.
  • the housing in which the suction chambers I, II, III are formed is fastened on cross members 14 and 15 which extend transversely to the conveying direction of the arc stream.
  • the two crossbeams 14 and 15 serve as bearing points for the ends of a pivot axis 20, to which a shut-off element 17 is attached.
  • the shut-off element 17 is received on the pivot axis 20 by means of a screw connection 21.
  • the cross member 15 receives an abutment 22 in which an actuating member 18 is articulated, at the end of which a control fork 19 is attached, the retraction and extension of which causes the pivot axis 20 to rotate.
  • a rear suction box 24 into which a suction channel of the suction chamber I opens.
  • Both trusses 14 and 15 are provided with openings 16, whereby the suction boxes 23 and 24 are connected to the common suction nozzle 38.
  • the suction nozzle 38 is delimited by the two cross members 14 and 15 and is closed on its underside by a sheet 29 on which a strip-shaped seal 26 is fastened. This serves as a stop for an end section of the shut-off element 17, while a further seal 25 is provided above the shut-off element 17, against which the other end of the shut-off element 17 strikes.
  • Figure 2 shows a cross section through the feed table in the operating phase conveying the 1st sheet.
  • the housing in which the suction chambers I, II, III are formed and around which the endless conveyor belt 9 rotates, is accommodated in the center of the conveying plane 5.
  • the conveyor level 5 is limited by feeder side parts 31.
  • Table plates 30 extend between the side parts 31 and the suction chamber housing.
  • the cross member 15 extends between the feed side parts 31; the abutment 22 of the actuator 18 is received on it.
  • the control fork 19 is connected to the pivot axis 20 via a lever.
  • the pivot axis 20 divides the pivotable shut-off element 17 in this exemplary embodiment approximately in a ratio of 2: 1.
  • the eccentric arrangement of the shut-off element 17, with respect to the pivot axis 20, causes the shut-off element 17 to be divided.
  • the connection of the middle suction chamber II to the suction nozzle 38 is interrupted by the extended section of the eccentrically mounted shut-off element 17. Since the Openings 16 in the areas of the cross members 14 and 15, which delimit the suction port 38, are located outside the pivoting range of the shut-off element 17, the vacuum in the suction chambers I and III remains independent of the position of the shut-off element 17.
  • the shut-off element 17 occupies position 36 in this operating phase.
  • the suction nozzle 38 consists of a plurality of sheets 27, 28 and 29. It would also be conceivable to design the suction nozzle 38 in a tubular manner, which would result in a different geometry of the shut-off element 17. The use of a rectangular tube would also be conceivable.
  • FIG. 3 shows the vacuum distribution prevailing in the conveying plane when the arc flow is fully developed.
  • suction air present in suction chamber I flows into the rear suction box 24. Through the openings 16 in the cross member 15, the suction air flows into the suction nozzle 38, regardless of the working position of the shut-off element 17.
  • the suction air flow acting on the middle suction chamber II is sucked off through the suction nozzle 38 when the shut-off element 17 is set down (see FIG. 4).
  • the vacuum in suction chamber III is present via the front suction box 23 and the openings 16 in the crossmember 14 with the suction nozzle 38 - regardless of the working position of the shut-off element 17.
  • FIG. 4 a representation of the section IV-IV of Figure 3, the working position 37 of the shut-off element 17 is shown.
  • the shut-off element 17 is therefore pivoted downward, as a result of which the vacuum prevailing in the suction nozzle 38 also in suction chamber II below the conveyor belt 9 which promotes the shingled sheet flow.
  • the rear section of the eccentrically mounted shut-off element 17 closes the atmospheric ventilation opening between the pivot axis 20 and the seal 25 on the end plate 28.
  • the shut-off element 17 pivots into its working position 37, as a result of which the suction chamber II is subjected to a vacuum. If clock rollers 7 are provided above the belt drive roller 8, the shut-off element 17 is pivoted down by the actuating member 18 at the beginning of the phase during which the clock rollers 7 rest on the belt drive roller 8. In this way, slippage of the first sheet 32 can be effectively avoided with the vacuum in the suction chamber II building up even more.
  • the shut-off element 17 is pivoted into the working position 37, the stationary state of the system is present, because now a continuous delivery of a shingled sheet stream can take place.
  • FIG. 5 shows the vacuum distribution when the last sheet is conveyed.
  • the last curve 35 shown here with its maximum length 39, extends from its arrival position at the front marks 11 to about the end of the suction chamber II, in front of the web 12.
  • the middle suction chamber II is connected to the atmosphere by the pivoted shut-off element 17 ( see Figure 6), only the suction chambers I and III are active. As soon as the last sheet 35 approaches the front marks 11, the shut-off element 17 is pivoted into its working position 36 and the negative pressure effective in the suction chamber II is abruptly reduced.
  • the working position 36 of the shut-off element 17 shown in FIG. 6 enables the suction chamber II to be ventilated, while the suction chambers I and III remain connected to the suction nozzle 38 analogously to the conveyance of the 1st bend 32.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
EP95105620A 1994-05-07 1995-04-13 Dispositif pour adapter la dépression dans une table de guidage d'une bande sous vide d'un dispositif d'alimentation en feuilles Expired - Lifetime EP0680908B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4416286 1994-05-07
DE4416286A DE4416286C2 (de) 1994-05-07 1994-05-07 Vorrichtung zur Anpassung des Unterdruckes in einem Saugbandzuführtisch eines Bogenanlegers

Publications (2)

Publication Number Publication Date
EP0680908A1 true EP0680908A1 (fr) 1995-11-08
EP0680908B1 EP0680908B1 (fr) 1999-03-24

Family

ID=6517649

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95105620A Expired - Lifetime EP0680908B1 (fr) 1994-05-07 1995-04-13 Dispositif pour adapter la dépression dans une table de guidage d'une bande sous vide d'un dispositif d'alimentation en feuilles

Country Status (4)

Country Link
US (1) US5697606A (fr)
EP (1) EP0680908B1 (fr)
JP (1) JP3522386B2 (fr)
DE (2) DE4416286C2 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884259A2 (fr) * 1997-06-12 1998-12-16 MAN Roland Druckmaschinen AG Table de marge
EP1088778A2 (fr) * 1999-10-02 2001-04-04 MAN Roland Druckmaschinen AG Table de marge
DE10213705B4 (de) * 2001-04-26 2014-07-03 Heidelberger Druckmaschinen Ag Vorrichtung zum Fördern eines Bogenstroms von einem Bogenstapel zu einer bogenverarbeitenden Maschine

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19616714A1 (de) * 1996-04-26 1997-11-06 Heidelberger Druckmasch Ag Vorrichtung zum Fördern eines insbesondere geschuppten Stroms von Bogen zu einer bogenverarbeitenden Maschine
DE19618870A1 (de) * 1996-05-10 1997-11-13 Heidelberger Druckmasch Ag Vorrichtung zum Fördern eines insbesondere geschuppten Stroms von Bogen zu einer bogenverarbeitenden Maschine
ATE215475T1 (de) * 1996-12-20 2002-04-15 Interket Trykkeri As Etikettenstapler für rotationsetikettierer
US6311831B1 (en) 1998-09-10 2001-11-06 Polytype America Corporation Tube loading system
US6161677A (en) * 1998-09-10 2000-12-19 Polytype America Corporation Tube loading system
US6243120B1 (en) * 1999-04-08 2001-06-05 Gerber Scientific Products, Inc. Replaceable donor sheet assembly with memory for use with a thermal printer
DE29910850U1 (de) 1999-06-25 2000-11-23 Voith Sulzer Papiertech Patent Unterdruck-Fördereinrichtung
US6443444B1 (en) * 1999-10-04 2002-09-03 Lockhead Martin Corporation Singulation mechanism
US6481565B1 (en) * 2000-09-26 2002-11-19 Bernard J. Sherwood Conveyor system with pneumatic transfer
US6575450B2 (en) 2001-01-30 2003-06-10 Lockheed Martin Corporation Singulation mechanism
US20040025466A1 (en) * 2002-08-06 2004-02-12 Marley Cooling Technologies, Inc. Modular frame method and apparatus
JP4571812B2 (ja) 2003-02-24 2010-10-27 ハイデルベルガー ドルツクマシーネン アクチエンゲゼルシヤフト シート搬送装置
US7118103B2 (en) * 2003-04-14 2006-10-10 Heidelberger Druckmaschinen Ag Device for conveying sheets through a printing machine
DE102004015335A1 (de) 2004-03-30 2005-10-20 Koenig & Bauer Ag Vorrichtung zum Zuführen eines geschuppten Bogenstromes
US20060181011A1 (en) * 2004-09-24 2006-08-17 Heidelberger Druckmaschinen Ag Transport belt
GB0511299D0 (en) * 2005-06-03 2005-07-13 Scan Coin Ind Ab Coin conveying apparatus
JP2008080526A (ja) * 2006-09-26 2008-04-10 Brother Ind Ltd 液体噴射装置
US20090057998A1 (en) * 2007-08-31 2009-03-05 Pitney Bowes Inc. Apparatus and Method for Printing And/Or Electronically Scanning Dual Face Surfaces of a Sheet/Mailpiece
US20120157279A1 (en) * 2010-12-20 2012-06-21 Uwe Schneider Process and Apparatus for Joining Flexible Components
CN102602722B (zh) * 2011-01-19 2015-10-28 海德堡印刷机械股份公司 吸带台
JP5179610B2 (ja) * 2011-03-03 2013-04-10 富士フイルム株式会社 用紙搬送装置及びインクジェット記録装置

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FR2352742A1 (fr) * 1976-05-28 1977-12-23 Rengo Co Ltd Convoyeur pour l'amenee et l'evacuation d'une bande de carton ondule dans un dispositif de coupe
EP0454011A2 (fr) * 1990-04-26 1991-10-30 Koenig & Bauer Aktiengesellschaft Dispositif pour convoyer un courant de feuilles, en particulier un courant en écaille
EP0554774A1 (fr) * 1992-02-07 1993-08-11 MAN Roland Druckmaschinen AG Dispositif pour transporter un courant de feuilles se chevauchant

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SU48409A1 (ru) * 1935-08-27 1936-08-31 Г.П. Дворецкий Способ гор чего ремонта металлургических печей
DE1976230U (de) * 1967-11-02 1968-01-04 Albert Schnellpressen Bogenfoerdervorrichtung am anlegetisch von druckmaschinen.
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JPH0491953A (ja) * 1990-08-06 1992-03-25 Matsushita Electric Ind Co Ltd クリームはんだ印刷装置
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DE4126643A1 (de) * 1991-08-12 1993-02-18 Koenig & Bauer Ag Trommel zum transportieren und uebergeben von bogen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2352742A1 (fr) * 1976-05-28 1977-12-23 Rengo Co Ltd Convoyeur pour l'amenee et l'evacuation d'une bande de carton ondule dans un dispositif de coupe
EP0454011A2 (fr) * 1990-04-26 1991-10-30 Koenig & Bauer Aktiengesellschaft Dispositif pour convoyer un courant de feuilles, en particulier un courant en écaille
EP0554774A1 (fr) * 1992-02-07 1993-08-11 MAN Roland Druckmaschinen AG Dispositif pour transporter un courant de feuilles se chevauchant

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0884259A2 (fr) * 1997-06-12 1998-12-16 MAN Roland Druckmaschinen AG Table de marge
EP0884259A3 (fr) * 1997-06-12 1999-04-14 MAN Roland Druckmaschinen AG Table de marge
EP1088778A2 (fr) * 1999-10-02 2001-04-04 MAN Roland Druckmaschinen AG Table de marge
EP1088778A3 (fr) * 1999-10-02 2002-12-04 MAN Roland Druckmaschinen AG Table de marge
DE10213705B4 (de) * 2001-04-26 2014-07-03 Heidelberger Druckmaschinen Ag Vorrichtung zum Fördern eines Bogenstroms von einem Bogenstapel zu einer bogenverarbeitenden Maschine
DE10213705C5 (de) * 2001-04-26 2017-01-05 Heidelberger Druckmaschinen Ag Vorrichtung zum Fördern eines Bogenstroms von einem Bogenstapel zu einer bogenverarbeitenden Maschine

Also Published As

Publication number Publication date
JP3522386B2 (ja) 2004-04-26
US5697606A (en) 1997-12-16
EP0680908B1 (fr) 1999-03-24
DE4416286C2 (de) 1999-10-28
DE59505407D1 (de) 1999-04-29
JPH07309475A (ja) 1995-11-28
DE4416286A1 (de) 1995-11-09

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