EP0476264A1 - Apparatus for stacking sheets - Google Patents

Apparatus for stacking sheets Download PDF

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Publication number
EP0476264A1
EP0476264A1 EP91112203A EP91112203A EP0476264A1 EP 0476264 A1 EP0476264 A1 EP 0476264A1 EP 91112203 A EP91112203 A EP 91112203A EP 91112203 A EP91112203 A EP 91112203A EP 0476264 A1 EP0476264 A1 EP 0476264A1
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EP
European Patent Office
Prior art keywords
pallet
stacking
platform
sheets
runner
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
EP91112203A
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German (de)
French (fr)
Other versions
EP0476264B1 (en
Inventor
Peter Voss
Ralf Zehl
Ernst Claassen
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.)
Jagenberg AG
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Jagenberg AG
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Filing date
Publication date
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Priority to AT9191112203T priority Critical patent/ATE104642T1/en
Publication of EP0476264A1 publication Critical patent/EP0476264A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H31/00—Pile receivers
    • B65H31/32—Auxiliary devices for receiving articles during removal of a completed 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
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/422—Handling piles, sets or stacks of articles
    • B65H2301/4225—Handling piles, sets or stacks of articles in or on special supports
    • B65H2301/42256—Pallets; Skids; Platforms with feet, i.e. handled together with the stack
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/10—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns
    • Y10S414/106—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including means for supplying pallet or separator to group

Definitions

  • the invention relates to a device for stacking sheets, in particular sheets of paper or cardboard, on a pallet according to the preamble of patent claim 1.
  • Generic stacking devices are used in the processing of paper or cardboard to store sheets which, for. B. were produced with a cross cutting machine, continuously stacked on pallets. In order to keep the drop height of the sheets constant when placing them down, the pallets lie on a lifting and lowering storage platform, which is continuously lowered in accordance with the height increase of the stack.
  • a generic stacking device in which the sheets are stacked during a pallet change on an auxiliary stacking platform that can be moved into the area of the storage platform in order to be able to carry out the stack change without loss, that is to say without removing sheets, at full working speed . While on the If the auxiliary stacking platform is stacked, the storage platform can be lowered to remove the finished stack and pick up a new empty pallet. The new pallet is then moved up with the storage platform to below the auxiliary stacking platform, and the intermediate stack is transferred to the new pallet by moving out the auxiliary stacking platform.
  • the invention has for its object to be able to determine the pallet height in a generic stacking device so that a smooth transfer of the intermediate stack from the auxiliary stacking platform to the new pallet is possible.
  • the entire pallet surface is scanned when determining the pallet height.
  • the feeler element can depress depressing elevations, which are therefore not registered.
  • the subclaims contain preferred, since particularly advantageous, embodiments of the invention: While the runner attached to the lateral pivot levers contains a structurally advantageous embodiment of a feeler element, the feeler element is advantageously arranged in a stationary manner in the region of the pallet feed to the storage platform. The pallet height can thus be determined when a new pallet is transported to the storage platform.
  • Claim 4 contains an advantageous arrangement for measuring the vertical deflection of the probe element to determine the maximum deflection.
  • the adjustable contact pressure according to claim 5 enables the adjustment of the pallet height determination to disturbing and non-disturbing elevations.
  • the probe element is expediently connected to a double-acting piston-cylinder unit, so that the contact pressure can be increased or decreased.
  • Fig. 1 shows a stacking device according to the invention in side view transverse to the direction of the sheets.
  • FIG. 2 shows the device for determining the pallet height in an enlarged detail from FIG. 1.
  • the frame of the stacking device has four stands 1, 2, between which there is a lifting and lowering storage platform 3.
  • the depositing platform 3 can be raised up to the conveying plane 4 of the scalloped sheets 5 and lowered down to the floor, where it is aligned with an infeed conveyor 6 for empty pallets 7 arranged through the space between the stands 1.
  • the feed conveyor 6 has, like the top of the platform 3, funding, e.g. B. roles with which the pallets 7 can be transported for a pallet change in the running direction of the sheets 5.
  • a lifting and lowering auxiliary stacking platform 8 is mounted in the inlet-side stands 1 and can be moved horizontally into the area of the storage platform 3 by means of a drive 9.
  • the sheets 5 are stacked on the auxiliary stacking platform 8, while full stacks are being transported and new pallets 7 are being transported into the stacking area.
  • the auxiliary stacking platform 8 is located outside the stacking area (on the left in FIG. 1). As far as the stacking device is known and z. B. described in DE-PS 37 39 194.
  • a device for determining the pallet height is arranged between the two upright stands 1, which is shown enlarged in FIG. 2.
  • two cross members 11, 12 are fastened at the same height over the working width.
  • two lateral pivoting levers 13 pointing in the direction of sheet travel are articulated, between the free ends of which a runner 14 extending across the working width is fastened.
  • the length of the pivot lever 13 and its position is chosen so that the runner 14 can be lowered to close to the floor (up to a distance of approximately 80 mm) and raised to a position above the maximum height of a pallet 7 and thus onto the surfaces the continuous pallets 7 can be placed.
  • the downward pressure in the piston-cylinder unit 15 can be adjusted by means of a fine control valve.
  • a side plate 16 on one side on the crossmember 12 with a vertical guide 17 for a vertical rack 18 connected to the runner 14 attached, which meshes with the pinion 19 of an angle encoder 20 attached to the side plate 16.
  • the angular encoder 20 thus registers the vertical deflection of the runner 14 as it passes through a pallet 7.
  • the contact pressure which depends on the weight of the runner 14, is set by means of the piston-cylinder unit 15 in such a way that non-disturbing elevations, such as protective papers lying on top, which are folded up, are depressed and are therefore not registered.
  • Disturbing surveys such as protruding nails, on the other hand, lead to a deflection and are registered.
  • the stored maximum height h of the pallet 7 then serves to control the approach of the storage platform 3 with the pallet 7 lying on it from below to the auxiliary stacking platform 8. So that the supply of sheets 5 does not have to be interrupted when changing stacks, an intermediate stack 22 is formed on the auxiliary stack platform 8 until a full stack has been removed and a new pallet 7 has been moved under the auxiliary platform 8 carrying the intermediate stack 22. During the intermediate stacking, the auxiliary platform 8 moves continuously downwards in order to keep the surface of the intermediate stack 22 approximately at the level of the feed plane 4. Since the intermediate stack 22 is placed on the advancing new pallet 7 by pulling out the auxiliary stack platform 8, it is It is necessary to position the new pallet 7 exactly under the auxiliary stacking platform 8 except for a small safety distance (approx. 10 mm).
  • the movement of a new pallet 7 against the underside of the auxiliary stacking platform 8 is controlled in such a way that an inductive proximity switch 23 arranged on the underside of the supporting structure of the slide 8 registers the approach of the storage platform 3 as a reference point if the pallet 7 is still a sufficiently large distance from the auxiliary stacking platform 8 has.
  • This known distance is then further reduced by lowering the auxiliary stacking platform 8 and lifting the storage platform 3 until the distance of the surface of the storage platform 3 from the auxiliary stacking platform 8 is only the measured height of the pallet plus 10 mm safety distance.
  • These further approaches are controlled via two angle encoders, one of which measures the vertical movement of the auxiliary stacking platform 8, the other the vertical movement of the storage platform 3.
  • the feeler element (runner 14) is arranged horizontally in a stationary manner.
  • the pallet is moved relative to the probe element to scan the entire pallet surface. It is also possible to arrange the probe element so that it can be moved horizontally so that it can be moved over the entire surface of a stationary pallet. So z. B. a movable between the stands 1, 2 feel the palette 7 resting on the storage platform 3. Then it has to Probe element can be moved from the storage area into a position not disturbing the stacking.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pile Receivers (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Forming Counted Batches (AREA)
  • Discharge By Other Means (AREA)

Abstract

Apparatuses for stacking sheets, in particular paper or cardboard sheets, onto a pallet are known, which have a raisable and lowerable laying-down platform, on which the pallet rests during stacking, and an auxiliary stacking platform which can be moved into the region of the laying-down platform and serves for the intermediate stacking of the sheets during a pallet change. <??>According to the invention, the height of a pallet (7) is determined by means of a vertically moveable feeler element (skid 14) which can be laid onto the pallet surface and moved over the entirety thereof. To this end, the maximum upward deflection is measured during the movement of the feeler element over the pallet surface. The pallet height thus determined permits problem-free transfer of the intermediate stack (22) from the auxiliary stacking platform (8) onto a new pallet (7). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Stapeln von Bögen, insbesondere Papier- oder Kartonbögen, auf eine Palette gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for stacking sheets, in particular sheets of paper or cardboard, on a pallet according to the preamble of patent claim 1.

Bei der Verarbeitung von Papier oder Karton werden gattungsgemäße Stapelvorrichtungen eingesetzt, um Bögen, die z. B. mit einer Querschneidemaschine hergestellt wurden, kontinuierlich auf Paletten zu stapeln. Um die Fallhöhe der Bögen beim Ablegen konstant zu halten, liegen die Paletten auf einer heb- und senkbaren Ablageplattform, die entsprechend dem Höhenzuwachs des Stapels kontinuierlich abgesenkt wird.Generic stacking devices are used in the processing of paper or cardboard to store sheets which, for. B. were produced with a cross cutting machine, continuously stacked on pallets. In order to keep the drop height of the sheets constant when placing them down, the pallets lie on a lifting and lowering storage platform, which is continuously lowered in accordance with the height increase of the stack.

Aus der DE-PS 37 39 194 ist eine gattungsgemäße Stapelvorrichtung bekannt, bei der die Bögen während eines Palettenwechsels auf einer in den Bereich der Ablageplattform einfahrbaren Hilfsstapelplattform zwischengestapelt werden, um den Stapelwechsel verlustlos, also ohne Ausschleusen von Bögen, bei voller Arbeitsgeschwindigkeit durchführen zu können. Während auf der Hilfsstapelplattform gestapelt wird, kann die Ablageplattform abgesenkt werden, um den fertigen Stapel abzutransportieren und eine neue leere Palette aufzunehmen. Die neue Palette wird anschließend mit der Ablageplattform bis unterhalb der Hilfsstapelplattform hochbewegt, und der Zwischenstapel wird durch Herausfahren der Hilfsstapelplattform auf die neue Palette übergeben.From DE-PS 37 39 194 a generic stacking device is known in which the sheets are stacked during a pallet change on an auxiliary stacking platform that can be moved into the area of the storage platform in order to be able to carry out the stack change without loss, that is to say without removing sheets, at full working speed . While on the If the auxiliary stacking platform is stacked, the storage platform can be lowered to remove the finished stack and pick up a new empty pallet. The new pallet is then moved up with the storage platform to below the auxiliary stacking platform, and the intermediate stack is transferred to the new pallet by moving out the auxiliary stacking platform.

Um die Fallhöhe des Zwischenstapels bei der Übergabe auf eine neue Palette möglichst gering zu halten, ist es erforderlich, diese vor dem Herausfahren der Hilfsstapelplattform mit möglichst geringem Abstand unterhalb der Hilfsstapelplattform exakt zu positionieren. Beim Positionieren muß die Höhe der Palette berücksichtigt werden, daher ist es aus der Praxis bekannt, mittels Fotozellen die Höhe der jeweiligen neuen Palette zu messen.In order to keep the drop height of the intermediate stack as low as possible when transferring it to a new pallet, it is necessary to position it exactly as far as possible below the auxiliary stack platform before the auxiliary stack platform is moved out. When positioning, the height of the pallet must be taken into account, so it is known from practice to use photocells to measure the height of the respective new pallet.

Diese Meßmethode hat sich jedoch bei Verwendung bestimmter Paletten als unzulänglich gezeigt. Die Fotozellen sprechen einerseits auf die Übergabe des Zwischenstapels auf die neue Palette nicht störende Erhebungen wie auf der Palette aufliegendes, hochstehendes Schutzpapier an, andererseits werden zu Störungen führende Erhebungen, wie hervorstehende Nägel, häufig nicht registriert.However, this measurement method has proven to be inadequate when using certain pallets. On the one hand, the photocells respond to the transfer of the intermediate stack to the new pallet, which does not interfere with surveys such as high-lying protective paper on the pallet, and on the other hand, surveys that lead to faults, such as protruding nails, are often not registered.

Der Erfindung liegt die Aufgabe zugrunde, bei einer gattungsgemäßen Stapelvorrichtung die Palettenhöhe so bestimmen zu können, daß eine problemlose Übergabe des Zwischenstapels von der Hilfsstapelplattform auf die neue Palette möglich ist.The invention has for its object to be able to determine the pallet height in a generic stacking device so that a smooth transfer of the intermediate stack from the auxiliary stacking platform to the new pallet is possible.

Diese Aufgabe wird mit den kennzeichnenden Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with the characterizing features of patent claim 1.

Nach der Erfindung wird bei der Bestimmung der Palettenhöhe die gesamte Palettenoberfläche abgetastet. Dabei kann das Tastelement nicht störende Erhebungen niederdrücken, die somit nicht registriert werden.According to the invention, the entire pallet surface is scanned when determining the pallet height. The feeler element can depress depressing elevations, which are therefore not registered.

Die Unteransprüche enthalten bevorzugte, da besonders vorteilhafte Ausgestaltungen der Erfindung:
Während die an seitlichen Schwenkhebeln befestigte Kufe nach Anspruch 2 eine konstruktiv vorteilhafte Ausgestaltung eines Tastelements enthält, ist nach Anspruch 2 das Tastelement vorteilhaft ortsfest im Bereich der Palettenzuführung zur Ablageplattform angeordnet. Somit läßt sich die Palettenhöhe beim Transport einer neuen Palette zu der Ablageplattform bestimmen.The subclaims contain preferred, since particularly advantageous, embodiments of the invention:
While the runner attached to the lateral pivot levers contains a structurally advantageous embodiment of a feeler element, the feeler element is advantageously arranged in a stationary manner in the region of the pallet feed to the storage platform. The pallet height can thus be determined when a new pallet is transported to the storage platform.

Patentanspruch 4 enthält eine vorteilhafte Anordnung zur Messung der vertikalen Auslenkung des Tastelements, um die maximale Auslenkung zu bestimmen.Claim 4 contains an advantageous arrangement for measuring the vertical deflection of the probe element to determine the maximum deflection.

Der einstellbare Auflagedruck nach Anspruch 5 ermöglicht die Anpassung der Palettenhöhenbestimmung auf störende und nicht störende Erhebungen. Zweckmäßigerweise ist dazu das Tastelement mit einer doppelt wirkenden Kolben-Zylinder-Einheit verbunden, so daß sich der Auflagedruck vergrößern oder verkleinern läßt.The adjustable contact pressure according to claim 5 enables the adjustment of the pallet height determination to disturbing and non-disturbing elevations. For this purpose, the probe element is expediently connected to a double-acting piston-cylinder unit, so that the contact pressure can be increased or decreased.

Die Zeichnungen dienen zur Erläuterung der Erfindung anhand eines vereinfacht dargestellten Ausführungsbeispiels.The drawings serve to explain the invention with reference to an embodiment shown in simplified form.

Fig. 1 zeigt eine Stapelvorrichtung nach der Erfindung in Seitenansicht quer zur Laufrichtung der Bögen.Fig. 1 shows a stacking device according to the invention in side view transverse to the direction of the sheets.

Fig. 2 zeigt in einem vergrößerten Ausschnitt von Fig. 1 die Einrichtung zur Bestimmung der Palettenhöhe.FIG. 2 shows the device for determining the pallet height in an enlarged detail from FIG. 1.

Das Gestell der Abstapelvorrichtung weist vier Ständer 1, 2 auf, zwischen denen sich eine heb- und senkbare Ablageplattform 3 befindet. Die Ablegeplattform 3 ist bis in die Förderebene 4 der geschuppt zugeförderten Bogen 5 anhebbar und bis auf den Boden absenkbar, wo sie mit einem einlaufseitig angeordneten, durch den Zwischenraum zwischen den Ständern 1 führenden Zuförderer 6 für leere Paletten 7 fluchtet. Der Zuförderer 6 weist ebenso wie die Oberseite der Plattform 3 Fördermittel auf, z. B. Rollen, mit denen die Paletten 7 für einen Palettenwechsel in Laufrichtung der Bögen 5 transportiert werden können.The frame of the stacking device has four stands 1, 2, between which there is a lifting and lowering storage platform 3. The depositing platform 3 can be raised up to the conveying plane 4 of the scalloped sheets 5 and lowered down to the floor, where it is aligned with an infeed conveyor 6 for empty pallets 7 arranged through the space between the stands 1. The feed conveyor 6 has, like the top of the platform 3, funding, e.g. B. roles with which the pallets 7 can be transported for a pallet change in the running direction of the sheets 5.

In den einlaufseitigen Ständern 1 ist eine heb- und senkbare Hilfsstapelplattform 8 gelagert, die mittels eines Antriebs 9 horizontal in den Bereich der Ablageplattform 3 bewegt werden kann. Auf die Hilfsstapelplattform 8 werden die Bögen 5 zwischengestapelt, während volle Stapel abtransportiert und neue Paletten 7 in den Abstapelbereich transportiert werden. Beim Stapeln auf eine Palette 7, die auf der Ablageplattform 3 liegt, befindet sich die Hilfsstapelplattform 8 außerhalb des Stapelbereichs (in Fig. 1 links). Soweit ist die Abstapelvorrichtung bekannt und z. B. in der DE-PS 37 39 194 beschrieben.A lifting and lowering auxiliary stacking platform 8 is mounted in the inlet-side stands 1 and can be moved horizontally into the area of the storage platform 3 by means of a drive 9. The sheets 5 are stacked on the auxiliary stacking platform 8, while full stacks are being transported and new pallets 7 are being transported into the stacking area. When stacking on a pallet 7, which lies on the storage platform 3, the auxiliary stacking platform 8 is located outside the stacking area (on the left in FIG. 1). As far as the stacking device is known and z. B. described in DE-PS 37 39 194.

Zwischen den beiden einlaufseitigen Ständern 1 ist eine Einrichtung zur Bestimmung der Palettenhöhe angeordnet, die in Fig. 2 vergrößert dargestellt ist. Unterhalb der Führung 10 der Hilfsstapelplattform 8 und oberhalb des Palettenzuförderers 6 sind über die Arbeitsbreite zwei Quertraversen 11, 12 in gleicher Höhe befestigt. An der vorderen Quertraverse 11 sind zwei seitliche, in Bogenlaufrichtung weisende Schwenkhebel 13 angelenkt, zwischen deren freien Enden eine sich über die Arbeitsbreite erstreckende Kufe 14 befestigt ist. Die Länge der Schwenkhebel 13 und ihre Position ist so gewählt, daß die Kufe 14 bis nahe an den Boden (bis auf ca. 80 mm Abstand) absenkbar und bis in eine Position oberhalb der maximalen Höhe einer Palette 7 anhebbar ist und somit auf die Oberflächen der durchlaufenden Paletten 7 aufgelegt werden kann. Zum Anheben und Absenken der Kufe 14 dienen zwei seitliche, an der hinteren Ouertraverse 12 angelenkte doppelt wirkende Kolben-Zylinder-Einheiten 15, die jeweils an den Schwenkhebeln 13 angreifen. Zur Einstellung des Auflagedrucks der Kufe 14 auf den Paletten 7 ist der nach unten wirkende Druck in der Kolben-Zylinder-Einheit 15 mittels eines Feinregelventils einstellbar. Außerhalb der Arbeitsbreite ist an einer Seite an der Traverse 12 ein Seitenschild 16 mit einer senkrechten Führung 17 für eine mit der Kufe 14 verbundene, senkrechte Zahnstange 18 befestigt, die mit dem Ritzel 19 eines am Seitenschild 16 befestigten Winkelcodierers 20 kämmt. Der Winkelcodierer 20 registriert so die vertikale Auslenkung der Kufe 14 beim Durchlauf einer Palette 7.A device for determining the pallet height is arranged between the two upright stands 1, which is shown enlarged in FIG. 2. Below the guide 10 of the auxiliary stacking platform 8 and above the pallet feeder 6, two cross members 11, 12 are fastened at the same height over the working width. On the front crossmember 11, two lateral pivoting levers 13 pointing in the direction of sheet travel are articulated, between the free ends of which a runner 14 extending across the working width is fastened. The length of the pivot lever 13 and its position is chosen so that the runner 14 can be lowered to close to the floor (up to a distance of approximately 80 mm) and raised to a position above the maximum height of a pallet 7 and thus onto the surfaces the continuous pallets 7 can be placed. Two lateral, double-acting piston-cylinder units 15, which are articulated on the rear cross member 12 and which each act on the pivot levers 13, serve to raise and lower the runner 14. To adjust the contact pressure of the runner 14 on the pallets 7, the downward pressure in the piston-cylinder unit 15 can be adjusted by means of a fine control valve. Outside the working width, there is a side plate 16 on one side on the crossmember 12 with a vertical guide 17 for a vertical rack 18 connected to the runner 14 attached, which meshes with the pinion 19 of an angle encoder 20 attached to the side plate 16. The angular encoder 20 thus registers the vertical deflection of the runner 14 as it passes through a pallet 7.

Beim Zufördern der leeren Paletten 7 zu der Ablageplattform 3 wird deren maximale Höhe h beim Durchlauf zwischen den beiden Ständern 1 gemessen und abgespeichert. Eine vor der Kufe 14 angeordnete Lichtschranke 21, die auf die Vorderkante einer Palette 7 anspricht, löst die Absenkung der Kufe 14 aus der oberen Ruheposition aus. Dazu wird der nach oben wirkende Druck in der Kolben-Zylinder-Einheit 15 vermindert, so daß die Kufe 14 aufgrund ihres Eigengewichtes absinkt und sich auf die Palettenoberfläche auflegt. Die Kufe 14 tastet die Oberfläche der Palette 7 beim Durchlauf ab, wobei der Winkelcodierer 20 jeweils die vertikale Auslenkung registriert. Der maximale Wert wird als Höhe h der Palette 7 abgespeichert. Der vom Gewicht der Kufe 14 abhängige Auflagedruck wird mittels der Kolben-Zylinder-Einheit 15 so eingestellt, daß nicht störende Erhebungen wie aufliegende Schutzpapiere, die aufgefaltet hochstehen, niedergedrückt und somit nicht registriert werden. Störende Erhebungen wie hervorstehende Nägel führen dagegen zu einer Auslenkung und werden registriert.When the empty pallets 7 are conveyed to the storage platform 3, their maximum height h is measured and stored during the passage between the two stands 1. A light barrier 21 arranged in front of the runner 14, which responds to the front edge of a pallet 7, triggers the lowering of the runner 14 from the upper rest position. For this purpose, the upward pressure in the piston-cylinder unit 15 is reduced, so that the runner 14 sinks due to its own weight and lies on the pallet surface. The runner 14 scans the surface of the pallet 7 as it passes, the angle encoder 20 registering the vertical deflection in each case. The maximum value is stored as the height h of the pallet 7. The contact pressure, which depends on the weight of the runner 14, is set by means of the piston-cylinder unit 15 in such a way that non-disturbing elevations, such as protective papers lying on top, which are folded up, are depressed and are therefore not registered. Disturbing surveys such as protruding nails, on the other hand, lead to a deflection and are registered.

Die abgespeicherte maximale Höhe h der Palette 7 dient anschließend dazu, die Annäherung der Ablageplattform 3 mit der aufliegenden Palette 7 von unten an die Hilfstapelplattform 8 zu steuern. Damit die Zufuhr von Bögen 5 bei einem Stapelwechsel nicht unterbrochen werden muß, wird auf der Hilfsstapelplattform 8 ein Zwischenstapel 22 gebildet, bis ein voller Stapel abtransportiert und eine neue Palette 7 unter die den Zwischenstapel 22 tragenden Hilfsplattform 8 bewegt wurde. Während des Zwischenstapelns bewegt sich die Hilfsplattform 8 kontinuierlich nach unten, um die Oberfläche des Zwischenstapels 22 etwa in Höhe der Zuförderebene 4 zu halten. Da der Zwischenstapel 22 auf die heranbewegte neue Palette 7 durch Herausziehen der Hilfsstapelplattform 8 abgelegt wird, ist es erforderlich, die neue Palette 7 bis auf einen geringen Sicherheitsabstand (ca. 10 mm) exakt unter der Hilfsstapelplattform 8 zu positionieren. Feste Erhebungen wie hervorstehende Nägel auf der Palettenoberfläche, würden zu Kollisionen mit der Hilfsstapelplattform 8 führen, falls sie nicht beim Anheben der Palette 7 berücksichtigt würden. Die Übergabe des Zwischenstapels 22 auf die Palette 8 nicht störende Erhebungen, wie aufgefaltete Schutzpapiere, dürfen dagegen nicht berücksichtigt werden, da andernfalls der Zwischenstapel 22 mit einer zu großen Fallhöhe auf die Palette 7 übergeben wird. Diese Anforderungen werden durch die vorstehend beschriebene Bestimmung der Palettenhöhe erfüllt.The stored maximum height h of the pallet 7 then serves to control the approach of the storage platform 3 with the pallet 7 lying on it from below to the auxiliary stacking platform 8. So that the supply of sheets 5 does not have to be interrupted when changing stacks, an intermediate stack 22 is formed on the auxiliary stack platform 8 until a full stack has been removed and a new pallet 7 has been moved under the auxiliary platform 8 carrying the intermediate stack 22. During the intermediate stacking, the auxiliary platform 8 moves continuously downwards in order to keep the surface of the intermediate stack 22 approximately at the level of the feed plane 4. Since the intermediate stack 22 is placed on the advancing new pallet 7 by pulling out the auxiliary stack platform 8, it is It is necessary to position the new pallet 7 exactly under the auxiliary stacking platform 8 except for a small safety distance (approx. 10 mm). Fixed elevations such as protruding nails on the pallet surface would lead to collisions with the auxiliary stacking platform 8 if they were not taken into account when lifting the pallet 7. On the other hand, the transfer of the intermediate stack 22 to the pallet 8, such as unfolded protective papers, should not be taken into account, since otherwise the intermediate stack 22 is transferred to the pallet 7 with an excessively high fall height. These requirements are met by the pallet height determination described above.

Die Bewegung einer neuen Palette 7 gegen die Unterseite der Hilfsstapelplattform 8 wird so gesteuert, daß ein an der Unterseite der Tragkonstruktion des Schlittens 8 angeordneter induktiver Näherungsschalter 23 als Referenzpunkt die Annäherung der Ablageplattform 3 registriert, wenn die Palette 7 noch ausreichend großen Abstand von der Hilfsstapelplattform 8 hat. Dieser bekannte Abstand wird dann durch Absenken der Hilfsstapelplattform 8 und Anheben der Ablageplattform 3 weiter vermindert bis der Abstand der Oberfläche der Ablageplattform 3 von der Hilfsstapelplattform 8 nur noch die gemessene Höhe der Palette plus 10 mm Sicherheitsabstand beträgt. Die Steuerung dieser weiteren Annäherungen erfolgt über zwei Winkelcodierer, von denen einer die vertikale Bewegung der Hilfsstapelplattform 8, der andere die vertikale Bewegung der Ablageplattform 3 mißt.The movement of a new pallet 7 against the underside of the auxiliary stacking platform 8 is controlled in such a way that an inductive proximity switch 23 arranged on the underside of the supporting structure of the slide 8 registers the approach of the storage platform 3 as a reference point if the pallet 7 is still a sufficiently large distance from the auxiliary stacking platform 8 has. This known distance is then further reduced by lowering the auxiliary stacking platform 8 and lifting the storage platform 3 until the distance of the surface of the storage platform 3 from the auxiliary stacking platform 8 is only the measured height of the pallet plus 10 mm safety distance. These further approaches are controlled via two angle encoders, one of which measures the vertical movement of the auxiliary stacking platform 8, the other the vertical movement of the storage platform 3.

Im vorliegenden Ausführungsbeispiel ist das Tastelement (Kufe 14) horizontal ortsfest angeordnet. Zur Abtastung der gesamten Palettenoberfläche wird die Palette relativ zum Tastelement bewegt. Ebenso ist es möglich, das Tastelement horizontal verfahrbar anzuordnen, so daß es über die gesamte Oberfläche einer stillstehenden Palette bewegt werden kann. So kann z. B. ein zwischen den Ständern 1, 2 bewegbares Tastelement die auf der Ablageplattform 3 aufliegenden Paletten 7 abtasten. Dann muß das Tastelement aus dem Ablagebereich in eine das Stapeln nicht störende Position bewegbar sein.In the present exemplary embodiment, the feeler element (runner 14) is arranged horizontally in a stationary manner. The pallet is moved relative to the probe element to scan the entire pallet surface. It is also possible to arrange the probe element so that it can be moved horizontally so that it can be moved over the entire surface of a stationary pallet. So z. B. a movable between the stands 1, 2 feel the palette 7 resting on the storage platform 3. Then it has to Probe element can be moved from the storage area into a position not disturbing the stacking.

Claims (5)

Vorrichtung zum Stapeln von Bögen, insbesondere Papier- oder Kartonbögen, auf eine Palette - mit einer heb- und senkbaren Ablageplattform (3), auf der die Palette (7) beim Stapeln aufliegt, und - mit einer in den Bereich der lageplattform (3) einfahrbaren Hilfstapelplattform (8) zum Zwischenstapeln der Bögen (5) während eines Palettenwechsels gekennzeichnet durch eine Einrichtung zur Bestimmung der Palettenhöhe mit einem vertikal beweglichen, auf die Palettenoberfläche auflegbaren und über die gesamte Palettenoberfläche bewegbaren Tastelement (Kufe 14) und mit Mitteln zur Bestimmung der maximalen Auslenkung des Tastelements nach oben bei der Bewegung über die Palettenoberfläche.Device for stacking sheets, in particular sheets of paper or cardboard, on a pallet - With a lifting and lowering storage platform (3) on which the pallet (7) rests when stacking, and - With an auxiliary stacking platform (8) which can be moved into the area of the position platform (3) for intermediate stacking of the sheets (5) during a pallet change characterized by a device for determining the pallet height with a vertically movable probe element (skid 14) that can be placed on the pallet surface and movable over the entire pallet surface, and with means for determining the maximum deflection of the probe element when moving over the pallet surface. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß das Tastelement eine sich über die Arbeitsbreite erstreckende Kufe (14) ist, die am freien Ende von zwei seitlichen Schwenkhebeln (13) befestigt ist.Apparatus according to claim 1, characterized in that the feeler element is a runner (14) which extends over the working width and is attached to the free end of two lateral pivot levers (13). Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß das Tastelement (Kufe 14) horizontal ortsfest neben der Ablageplattform (3) im Bereich der Palettenzuführung angeordnet ist und die Paletten (7) beim Transport zur Ablageplattform (3) abtastet.Apparatus according to claim 1 or 2, characterized in that the feeler element (runner 14) is arranged horizontally stationary next to the storage platform (3) in the area of the pallet feed and scans the pallets (7) during transport to the storage platform (3). Vorrichtung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Messung der Auslenkung des Tastelements (Kufe 14) mittels einer am Tastelement senkrecht befestigten Zahnstange (18) erfolgt, die mit einem vertikal feststehenden Ritzel (19) kämmt, an dem ein Winkelkodierer (20) angeschlossen ist.Device according to one of claims 1 to 3, characterized in that the measurement of the deflection of the feeler element (runner 14) is carried out by means of a toothed rack (18) which is vertically attached to the feeler element and which meshes with a vertically fixed pinion (19) on which an angle encoder (20) is connected. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das Tastelement (Kufe 14) mit einstellbarem Druck auf der Palettenoberfläche aufliegt.Device according to one of claims 1 to 4, characterized in that the sensing element (runner 14) rests on the pallet surface with adjustable pressure.
EP91112203A 1990-09-21 1991-07-20 Apparatus for stacking sheets Expired - Lifetime EP0476264B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT9191112203T ATE104642T1 (en) 1990-09-21 1991-07-20 DEVICE FOR STACKING SHEETS.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4029919 1990-09-21
DE4029919A DE4029919C1 (en) 1990-09-21 1990-09-21

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EP0476264A1 true EP0476264A1 (en) 1992-03-25
EP0476264B1 EP0476264B1 (en) 1994-04-20

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EP91112203A Expired - Lifetime EP0476264B1 (en) 1990-09-21 1991-07-20 Apparatus for stacking sheets

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US (1) US5240369A (en)
EP (1) EP0476264B1 (en)
AT (1) ATE104642T1 (en)
DE (2) DE4029919C1 (en)
ES (1) ES2056529T3 (en)
FI (1) FI914437A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407189A (en) * 1992-05-29 1995-04-18 Heidelberger Druckmaschinen Ag Apparatus for continuous sheet delivery having a separating belt for separating a file of sheets
EP2537765A1 (en) * 2008-02-01 2012-12-26 MeadWestvaco Packaging Systems, LLC Loading device for supplying articles such as blanks

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4125450C2 (en) * 1991-08-01 1995-08-10 Kodak Ag Device for determining the thickness of sheets of paper
DE19642479A1 (en) 1996-10-15 1998-04-16 Heidelberger Druckmasch Ag Continuous feed paper sheet handler
ES2180314T3 (en) * 1998-02-25 2003-02-01 Voith Paper Jagenberg Gmbh DEVICE FOR STACKING SHEETS.
DE10045883A1 (en) * 2000-09-14 2002-03-28 Heidelberger Druckmasch Ag Boom for a machine that processes braided substrates
DE102007022908A1 (en) * 2007-05-14 2008-11-20 Krones Ag Method for loading and unloading a pallet and corresponding palletizer
EP4389662A1 (en) * 2022-12-21 2024-06-26 Canon Kabushiki Kaisha A sheet stacking and/or feeding device for a printer
CN116198898B (en) * 2023-04-20 2023-07-25 巴斯夫一体化基地(广东)有限公司 Warehouse for storing goods

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2410775A1 (en) * 1974-03-07 1975-09-11 Enzinger Union Werke Ag Empty pallet conveyor track - has feelers monitoring pallet surfaces for faults and initiating sorting operation
DE3739194C2 (en) * 1987-11-19 1990-04-26 Jagenberg Ag, 4000 Duesseldorf, De

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH504670A (en) * 1969-08-12 1971-03-15 Bjuro Vzaimozamenyaemosti V Me Device for checking the dimensions of moving workpieces
GB1581544A (en) * 1976-06-29 1980-12-17 Masson Scott Thrissell Eng Ltd Sheet stacking apparatus
DE2758291C3 (en) * 1977-12-27 1980-07-10 Jagenberg-Werke Ag, 4000 Duesseldorf Stack changing device
IT1137511B (en) * 1981-03-26 1986-09-10 Ezio Curti DEVICE TO STACK AUTOMATICALLY AND WITHOUT INTERRUPTION SUPPORT PLATES FOR PRINTED CIRCUITS, CONTINUOUSLY SUPPLIED BY A CONVEYOR
US4512701A (en) * 1982-12-22 1985-04-23 Olin Corporation Pallet height sensing mechanism
DE3535113A1 (en) * 1985-10-02 1987-04-23 Jagenberg Ag BOW DEPOSIT

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2410775A1 (en) * 1974-03-07 1975-09-11 Enzinger Union Werke Ag Empty pallet conveyor track - has feelers monitoring pallet surfaces for faults and initiating sorting operation
DE3739194C2 (en) * 1987-11-19 1990-04-26 Jagenberg Ag, 4000 Duesseldorf, De

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5407189A (en) * 1992-05-29 1995-04-18 Heidelberger Druckmaschinen Ag Apparatus for continuous sheet delivery having a separating belt for separating a file of sheets
EP2537765A1 (en) * 2008-02-01 2012-12-26 MeadWestvaco Packaging Systems, LLC Loading device for supplying articles such as blanks

Also Published As

Publication number Publication date
FI914437A (en) 1992-03-22
EP0476264B1 (en) 1994-04-20
DE59101435D1 (en) 1994-05-26
DE4029919C1 (en) 1992-04-02
FI914437A0 (en) 1991-09-20
US5240369A (en) 1993-08-31
ES2056529T3 (en) 1994-10-01
ATE104642T1 (en) 1994-05-15

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