EP0660798A1 - Procede et dispositif pour le depot ou l'empilage de feuilles amenees en serie - Google Patents

Procede et dispositif pour le depot ou l'empilage de feuilles amenees en serie

Info

Publication number
EP0660798A1
EP0660798A1 EP94916124A EP94916124A EP0660798A1 EP 0660798 A1 EP0660798 A1 EP 0660798A1 EP 94916124 A EP94916124 A EP 94916124A EP 94916124 A EP94916124 A EP 94916124A EP 0660798 A1 EP0660798 A1 EP 0660798A1
Authority
EP
European Patent Office
Prior art keywords
sheet
suction
vacuum conveyor
section
vacuum
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Withdrawn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
EP94916124A
Other languages
German (de)
English (en)
Inventor
Bruno Zumstein
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.)
Ziegler & Herzinger Maschinenbau GmbH
Original Assignee
Ziegler & Herzinger 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
Application filed by Ziegler & Herzinger Maschinenbau GmbH filed Critical Ziegler & Herzinger Maschinenbau GmbH
Publication of EP0660798A1 publication Critical patent/EP0660798A1/fr
Withdrawn legal-status Critical Current

Links

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
    • 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
    • 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
    • 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
    • B65H2406/00—Means using fluid
    • B65H2406/30—Suction means
    • B65H2406/32—Suction belts
    • B65H2406/323—Overhead suction belt, i.e. holding material against gravity

Definitions

  • the invention relates to a method for depositing or layering sheets or other flat material blanks fed in a row on a base or to a device for carrying out such a method.
  • the invention is characterized by the features in claim 9.
  • the detection of the sheets on their upper side with the aid of the vacuum conveying means allows low-friction and gentle transport of individual sheets over the lower lc. e. Due to the braking process on the rear section of the arch, each arch is stretched again shortly before being deposited. This process can not only be used for paper sheets, but also for other flat sheets Material cuts, such as foils, thin sheets, veneers and the like, are processed.
  • the braking means can be controlled in a particularly simple manner if the rear edge of each sheet is detected by a sensor and if a lowering device for at least the rear sheet section is controlled with the sensor.
  • the rear arch section can be loosened and lowered from different directions by mechanical contact or by a blast of compressed air. Detaching and lowering of the sheet is also possible simply by controlling the suction effect on the vacuum conveyor.
  • the control is advantageously carried out by the sheet itself during its transport with the aid of the vacuum conveyor, in that the sheet continuously changes the effective suction cross section. This type of lowering is particularly gentle and reliable, since no complex installations and controls are required.
  • the rear sheet section is particularly advantageously braked with a brake band, which has a lower transport speed than the vacuum conveying means.
  • the vacuum conveyor can, for example, have a feed speed of 0.5 m / s to 4 m / s, while the brake belt is driven at 0.1 m / s to 0.5 m / s.
  • the detachment of the sheet from the vacuum conveyor can be supported by blowing air, which acts on the top of the sheet.
  • a particularly advantageous construction of the device is obtained if the lowering device has at least one suction pipe extending in the transport direction, which opens into a suction chamber for one or more suction pipes, which in turn has a suction chamber opening leading to a suction source.
  • the suction cross-section of the suction chamber opening in relation to the effective suction cross-section on the suction pipe and on the suction chamber is dimensioned such that a transported sheet first reduces the effective suction cross-section on the suction pipe and on the suction chamber to the pipe cross-section of the suction pipe and then with its trailing edge enlarged again, whereby the pressure difference across the elbow is changed quadratically to the ratio of the suction cross section of the suction chamber opening and the effective suction cross section on the suction pipe and on the suction chamber.
  • a plurality of suction pipes are preferably arranged parallel and next to one another at a distance, blown air openings being formed between adjacent suction pipes, from which air can be blown downward against the bends.
  • the pressure difference ⁇ p at the intake manifold can be approx. 20 to 200 Pa. This value is approximately 100 to 100 Pa on the brake band and approximately 10 to 50 Pa on the blower for the blown air ducts.
  • the control of the suction on the vacuum conveyor could also be achieved by other means. It would be conceivable, for example, to change the effective suction cross sections with the aid of mechanical slides or the like. Controllable fans could also be used in order to adapt the pressure difference to the given conditions.
  • FIG. 1 shows a schematic side view of a device according to the invention
  • FIG. 2 shows the processes when depositing a sheet in individual sequences
  • FIG. 3 shows a mechanical lowering device
  • FIG. 4 shows a pneumatic lowering device with the compressed air nozzle at the top
  • FIG. 5 shows a pneumatic lowering device with a compressed air nozzle at the bottom in various operating states
  • FIG. 6 shows a bow lowering with self-control in different sequences
  • FIG. 9 shows a cross section through the plane A-A according to FIG. 7 through a vacuum conveyor
  • FIG 10 shows a cross section through the plane BB according to FIG 8 by a vacuum conveyor
  • FIG. 11 shows an alternative exemplary embodiment of a device with a curved conveyor belt support
  • Figure 12 shows another embodiment with suction channels open towards the bottom and with guided round belts.
  • FIG. 1 A stacking device is shown in FIG. 1, which for example forms the end of a sheet coating unit.
  • the sheets 1 are fed individually in a row and at a distance from one another with the aid of a sheet feeder 12 and taken over by a vacuum conveyor 3 in the sheet feed area 7. There they are captured on their upper side 4 and transported in the direction of arrow a over a base 2. In the present case, this support is a pallet that is automatically lowered as the stack height increases.
  • the rear sheet section 5 of each sheet is detached from the vacuum conveying means 3 in a manner described below and transferred to a brake band 8 which is arranged in front of the base 2 or in front of the stack 13.
  • the sheets should not overlap when entering the vacuum conveyor. In order to ensure a distance, the conveying speed of the vacuum conveying means 3 is therefore greater than that of the sheet feeder 12.
  • FIG. 2a The processes involved in depositing a sheet are shown sequentially in FIG. 2.
  • an active lowering device is used, in which a sensor 9 detects the rear edge 6 of a sheet 1 and activates a suitable mechanical or pneumatic lowering device.
  • the sheet 1 has just reached the position in which the lowering device is activated.
  • the rear arch section 5 is lowered from the actual transport level to a lower braking level, as from Figure 2b can be seen.
  • the brake band 8 runs . is driven at a lower speed than the vacuum conveying means 3 and which also sucks the sheet section 5 with a vacuum.
  • FIG. 3 shows a mechanically acting lowering device with a push-off device 15, which can be pivoted downward in the direction of arrow b from the transport plane.
  • the repelling device is articulated on a toggle lever 16 which can be activated with the aid of a pressure medium cylinder 17.
  • the pressure medium cylinder 17 receives a pressure pulse and the push-off device 15 presses the rear sheet section 5 down against the brake band 8, which takes over the sheet section with the aid of its suction box 18.
  • the suction belt of the vacuum conveyor 3 is indicated by 14, preferably several suction belts 14 running parallel next to one another.
  • FIG. 4 shows a pneumatically acting lowering means, in which a compressed air nozzle 11 directed against the brake band 8 is arranged above the transport plane.
  • the sensor 9 controls a valve 10 which briefly short-circuits the nozzle 11 with a compressed air source. Under the influence of the compressed air The rear arch section is also abruptly detached from the suction belt 14 and transferred to the brake belt 8.
  • FIG. 5 An alternative replacement using compressed air is shown in FIG. 5.
  • a blower 19 is connected to a nozzle 24 which is arranged between the transport plane and the braking plane and with which an air jet can be expelled in the transport direction a.
  • This initial situation is shown in Figure 5a.
  • the sensor 9 activates a flap 20 in the fan, the horizontal air flow being temporarily interrupted.
  • the rear arc section 5 separates from the vacuum conveyor 3 and moves against the brake band 8 according to FIG. 5b.
  • the flap 20 is then opened again and the air flow from the nozzle 24 now brings about a complete Detaching the sheet 1 from the vacuum conveyor 3, the sheet section 5 already resting firmly on the brake band.
  • FIGS. 6a to 6d A kind of passive bow lowering, in which a bow 1 is done only a few times.
  • the pressure conditions and without additional active means - ... is shown in FIGS. 6a to 6d.
  • This bow lowering requires special training of the Vacuum conveyor 3.
  • the vacuum conveyor has a plurality of parallel suction tubes 21 in the transport direction, which are provided on their underside, for example, with perforated suction belts 14.
  • Each one or more suction tubes 21 open into a suction chamber 22.
  • the suction chambers are each via a suction chamber opening 32 with a central suction fan 6.
  • the suction chambers are preferably arranged shortly before or immediately above the brake band in relation to the transport direction, and each suction pipe 21 has a pipe cross-section 33 perpendicular to the transport direction ( Figure 10).
  • Blown air openings 26 are formed between the suction tubes 21 which are arranged at a distance from one another and which likewise all are connected together with at least one compressed air blower.
  • a sheet 1 is transferred to the vacuum conveyor 3 in the sheet feed area 7 with the aid of a guide plate 28.
  • the cross section of an inlet chamber 23 open towards the bottom is completely covered and then the cross section of the suction chambers 22 or that of the suction pipes 21 open towards the bottom is covered more and more.
  • the pressure difference over the sheet 1 is increased quadratically to the ratio of the suction cross section of the suction chamber opening 32 and the effective suction cross section at the suction pipe and at the suction chamber, and this adheres to the suction belt 14 over its entire length.
  • the effective suction cross section increases again.
  • the leading edge of the sheet at least covers the suction chamber and if e.g. the pipe cross-section 33 of the suction pipe perpendicular to the transport direction is half as large as the suction cross-section of the suction chamber opening 32, the pressure difference is over. the arc in approximately 80% of the pressure difference which acts above the suction fan 25.
  • the trailing edge of the sheet 6 releases an effective suction cross section on the suction pipe 21 and on the suction chamber 22 has, which is 3 times as large as the suction cross section of the suction chamber opening 32, the amount in the suction pipe resp. the pressure difference acting over the arc is only about 10% of the pressure difference acting over the suction fan 25.
  • FIGS. 7 to 10 A possible spatial arrangement of the parallel suction pipes 21 and the blown air openings 26 can be seen from FIGS. 7 to 10. Such an arrangement is conceivable both for controlled active lowering means and for passive bow lowering.
  • the individual suction pipes 21 are connected to a central suction blower 25, while the blown air openings are operatively connected to a compressed air blower 27.
  • the device according to FIG. 11 has the same structure as the device according to FIG. 6.
  • the conveyor belt support 29 on the vacuum conveying means 3 is convexly curved downwards, the curvature being approximately the natural sag of the Corresponds to suction belt 14.
  • suction belt 14 lies much better without having to be stretched excessively.
  • FIG. 12 shows suction pipes 21, 21 'arranged in pairs, which are fully open towards the bottom.
  • Such channels can be produced relatively easily as profiles and can also be provided with a corresponding curvature.
  • a suction belt provided with openings, there are individual belts 30, on the underside of which a sheet rests in a sealing manner.
  • the belts run in longitudinal guides 31, which are integrated directly into the Sf tubes 21, 21 '.
  • the brake band 8 could also be replaced by another braking means, e.g. a suction drum or an oscillating suction bar can be replaced.

Landscapes

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

Abstract

Des feuilles transportées individuellement (1) sont saisies par leur face supérieure par un convoyeur à vide (3) et transportées sur un support. Pendant le transport, la partie arrière (5) de la feuille est abaissée du niveau de transport et freinée à l'aide d'un moyen de freinage, par exemple par un ruban de frein (8). L'abaissement peut alors se faire par des moyens mécaniques ou pneumatiques auxiliaires ou seulement par les différences de pression qui se produisent pendant le transport. La feuille est freinée jusqu'à son détachement complet du convoyeur à vide et tombe sur le support ou sur la pile (13).
EP94916124A 1993-07-09 1994-06-08 Procede et dispositif pour le depot ou l'empilage de feuilles amenees en serie Withdrawn EP0660798A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
CH2069/93 1993-07-09
CH206993 1993-07-09
PCT/CH1994/000111 WO1995001931A1 (fr) 1993-07-09 1994-06-08 Procede et dispositif pour le depot ou l'empilage de feuilles amenees en serie

Publications (1)

Publication Number Publication Date
EP0660798A1 true EP0660798A1 (fr) 1995-07-05

Family

ID=4225175

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94916124A Withdrawn EP0660798A1 (fr) 1993-07-09 1994-06-08 Procede et dispositif pour le depot ou l'empilage de feuilles amenees en serie

Country Status (2)

Country Link
EP (1) EP0660798A1 (fr)
WO (1) WO1995001931A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI108292B (fi) * 1999-07-19 2001-12-31 Raute Oyj Lajittelulaitteisto
DE19960351A1 (de) 1999-12-14 2001-06-21 Heidelberger Druckmasch Ag Bogenbremssystem für einen Ausleger einer Bogen verarbeitenden Maschine
DE102012207285A1 (de) * 2012-05-02 2013-11-07 Bdt Media Automation Gmbh Vorrichtung und Verfahren zur Bildung und/oder zum Transport eines Schuppenstroms von flachen, flexiblen Objekten
CN112938600A (zh) * 2021-03-02 2021-06-11 涡阳县利达塑料包装制品有限公司 一种具有整合功能的塑编袋生产用接袋装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4436302A (en) * 1981-05-28 1984-03-13 Beloit Corporation Apparatus for slowing down and preventing edge damage on moving sheets
DE3940960A1 (de) * 1989-12-12 1991-07-11 Jagenberg Ag Verfahren und vorrichtung zum abbremsen von auf einen stapel abzulegenden boegen, insbesondere papier- oder kartonboegen
DE4119511A1 (de) * 1991-06-13 1992-12-17 Jagenberg Ag Vorrichtung zum abbremsen von auf einem stapel abzulegenden boegen, insbesondere papier- oder kartonboegen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9501931A1 *

Also Published As

Publication number Publication date
WO1995001931A1 (fr) 1995-01-19

Similar Documents

Publication Publication Date Title
EP0134526B1 (fr) Procédé et dispositif d'alimentation repérée en feuilles dans une machine d'impression
EP0075121B1 (fr) Dispositif pour étirer des produits plats délivrés en formation imbriquée, en particulier des produits imprimés
WO1995001930A1 (fr) Dispositif pour le transport et le depot de feuilles a la sortie d'une rotative a feuilles
EP1588967B1 (fr) Table de transport
DE2906543A1 (de) Verfahren und anlage zum sortieren von tafelfoermigem gut
DE19516132C2 (de) Probebogenentnahme
DE69403540T2 (de) Vorrichtung zum Zusammentragen von Bögen mit übereinander angeordneten Fächern.
DE19905263C1 (de) Vorrichtung und Verfahren zur Probebogenentnahme
CH467207A (de) Verfahren und Vorrichtung zum Ablegen von blatt- oder bogenförmigem Material, insbesondere Furnierblättern
DE102020124433B4 (de) Anleger einer Bogen be- oder verarbeitende Maschine sowie Verfahren zur Unterstützung der Bogenvereinzelung in einem Anleger einer Bogen be- oder verarbeitende Maschine
WO1982000995A1 (fr) Dispositif pour l'empilage de produits plans imbriques, en particulier de produits imprimes
DE60002811T2 (de) Vorrichtung zum Abziehen jeweils eines Bogens von der Oberseite eines Bogenstapels
DE4447723B4 (de) Vorrichtung zum Zuführen oder Abführen von tafelförmigen Gütern
DE653260C (de) Vorrichtung zum Absondern des obersten Bogens von einem Stapel
EP0660798A1 (fr) Procede et dispositif pour le depot ou l'empilage de feuilles amenees en serie
DE2720674A1 (de) Bogenauslegevorrichtung fuer eine rotations-druckmaschine
DE2645985A1 (de) Anlage zum beschichten von zuschnitten, insbesondere bekleidungseinlagen, aus textilem material
DE69404358T2 (de) Eingabevorrichtung für Wäscherei
DE10139218C1 (de) Vorrichtung und ein Verfahren zur Ausrichtung von in einer Lage übereinander angeordneten Bogen
DE102017210690B4 (de) Bogenanleger für eine Druckmaschine
DE102019133570A1 (de) Seitliche Bogenausrichtung
CH683095A5 (de) Verfahren und Vorrichtung zum Puffern von Druckprodukten in Schuppenformation.
DE102019133573B4 (de) Seitliche Bogenausrichtung mit Saugerreinigung
DE102006061399B4 (de) Verfahren zum Zuführen eines geschuppten Bogenstromes
DE102021100500A1 (de) Blaseinrichtung zur Handhabung von Bogen im Substratpfad einer Bogen verarbeitenden Maschine, Bogenanlage sowie Bogenverarbeitungsmaschine

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 19950328

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI NL

17Q First examination report despatched

Effective date: 19960617

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

18D Application deemed to be withdrawn

Effective date: 19980623