EP0968128A1 - Device for stacking sheets, in particular sheet-fed paper or cardboard sheets delivered onto pallets - Google Patents

Device for stacking sheets, in particular sheet-fed paper or cardboard sheets delivered onto pallets

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Publication number
EP0968128A1
EP0968128A1 EP98910737A EP98910737A EP0968128A1 EP 0968128 A1 EP0968128 A1 EP 0968128A1 EP 98910737 A EP98910737 A EP 98910737A EP 98910737 A EP98910737 A EP 98910737A EP 0968128 A1 EP0968128 A1 EP 0968128A1
Authority
EP
European Patent Office
Prior art keywords
sensors
sheets
stacking
height
stack
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
EP98910737A
Other languages
German (de)
French (fr)
Other versions
EP0968128B1 (en
Inventor
Peter Voss
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.)
Voith Paper Jagenberg GmbH
Original Assignee
Jagenberg Papiertechnik 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
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Application filed by Jagenberg Papiertechnik GmbH filed Critical Jagenberg Papiertechnik GmbH
Publication of EP0968128A1 publication Critical patent/EP0968128A1/en
Application granted granted Critical
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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
    • B65H31/00—Pile receivers
    • B65H31/04—Pile receivers with movable end support arranged to recede as pile accumulates
    • B65H31/08—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another
    • B65H31/10—Pile receivers with movable end support arranged to recede as pile accumulates the articles being piled one above another and applied at the top of the 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
    • B65H43/00—Use of control, checking, or safety devices, e.g. automatic devices comprising an element for sensing a variable
    • B65H43/08—Photoelectric devices
    • 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
    • B65H2511/00—Dimensions; Position; Numbers; Identification; Occurrences
    • B65H2511/10—Size; Dimensions
    • B65H2511/15—Height, e.g. of 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
    • Y10S414/102—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including support for group
    • Y10S414/103—Vertically shiftable
    • Y10S414/105—Shifted by article responsive means

Definitions

  • the invention relates to a device for stacking sheets, in particular sheets or sheets of paper or cardboard that are fed in flakes on pallets, according to the preamble of patent claim 1.
  • devices are used for stacking sheets following a cross cutting machine, which have a lifting and lowering storage platform on which pallets for receiving the stack are placed.
  • the arches are of a vertically stationary, at a height above the maximum
  • Stacking height above the floor is conveyed into the stacking area and placed on the top of the stack.
  • the storage platform is continuously lowered in accordance with the height increase of the stack so that the drop height of the sheets from the feed conveyor onto the top of the stack remains essentially constant for trouble-free and edge-accurate storage.
  • the storage platform with the full pallet is lowered into the floor area. After the full pallet has been removed and a new empty pallet has been placed on the pallet, it is raised again to just below the feed level. So that the supply of sheets does not have to be interrupted when changing stacks, devices are known with an auxiliary stacking platform which carries the stacks which form during the removal of the finished stacks. The empty pallets are then moved to immediately below the auxiliary stacking platform and take over the partial stack that has formed on the auxiliary stacking platform. State of the art
  • a generic stacking device in which the lowering movement of the storage platform is controlled by means of a light button which is arranged in front of the stacking area and which scans the stack height.
  • the invention has for its object to improve a generic stacking device so that the drop height of the sheets can be easily adjusted to different values without effort.
  • At least three optical sensors for the top of the stack are arranged vertically one above the other and can be activated separately. Two selected sensors each determine the range of the maximum drop height deviation and thus enable the storage platform to be controlled in such a way that an upper maximum value is not exceeded and a lower minimum value is not fallen below.
  • Figure 1 shows a side view of the basic structure of a stacking device according to the invention.
  • Figure 2 shows an enlarged view of the arrangement of the optical sensors relative to the stack.
  • FIG. 3 shows the arrangement of the optical sensors in the ejection section in an oblique view against the direction of sheet travel.
  • the exemplary embodiment described below is used for stacking paper sheets 1 which are continuously conveyed in the form of scales following a cross-cutting machine.
  • the sheets 1 are fed to the stacking area by a feed conveyor 2 designed as a belt conveyor, which is arranged at a height above the maximum stacking height above the floor.
  • the stacks 3 are formed on pallets 4, which are placed on a storage platform 5.
  • the storage platform 5 is suspended in the frame 6 of the stacking device on pull chains 8. It can be raised and lowered by means of the pull chains 8 from the corridor area to the area of the feed level 7 of the sheets 1.
  • the stacking device has the known elements for the edge-accurate depositing of the sheets 1 on the stack 3: a notice board 9 for the sheet leading edges and side shaking plates 10, which act on the sheet longitudinal edges.
  • the so-called ejection section is arranged at the level of the feed plane, the elements of which ensure a trouble-free transfer of the sheets 1 onto the stack 3.
  • the area of the ejection section is shown enlarged in FIG. 3.
  • a rigid plate 12 Connected to the belt conveyor 2 is a rigid plate 12, which extends vertically downward from the feed plane and which delimits the stack area on the inlet side. The trailing edges of the sheet are aligned on the plate 12.
  • the plate 12 has cutouts in which ejection rollers 13 are mounted, which together with blowing nozzles 1 blowing in the sheet running direction ensure safe transport of the sheets 1 into the stacking area guarantee.
  • the device for stack height scanning consists of a box-shaped housing
  • optical sensors 17 are arranged vertically one above the other.
  • 7 7 reflection light sensors are used as optical sensors, in which the light transmitter and light receiver are located in one housing (housing 1 5).
  • the vertical distance between two sensors 17 is a maximum of 20 mm, preferably between 5 mm and 10 mm, in the present example 7.5 mm.
  • the uppermost sensor 17 is located at a short distance below the feed plane, the distance being large enough to be able to stop the upward movement of the platform 5 early enough for the top of the stack to remain below the feed plane 7.
  • the vertical position of the uppermost sensor 17 is therefore selected such that the top of the stack can be controlled independently of the sheet material to be stacked so that it does not fall below the desired minimum distance from the feed plane 7.
  • the uppermost sensor 1 7 is 10 mm below the feed plane 7.
  • the sensors 17 are arranged offset in two vertical lines so that the desired small vertical distance between two sensors 17 is achieved.
  • the signal lines 1 8 are in the housing 1 5, which is connected to a control device, not shown, for controlling the vertical movement of the storage platform 5.
  • two of the five sensors 17 are activated, the rest are inactive.
  • the upper of the two active sensors 17 determines the minimum distance of the top of the stack from the feed plane 7, and the lower active sensor 17 determines the maximum distance.
  • the vertical position of the top of the stack is controlled by a vertical movement of the storage platform 5 so that it is held essentially in the desired vertical area between the two active sensors 17.
  • the control is expediently carried out via a two-point control, which is one when the upper position is exceeded Lowering movement and when falling below the lower position triggers a lifting movement of the storage platform 5.
  • both the minimum drop height and the control range of the drop height can be set to two different values.

Abstract

Devices for stacking sheet-fed paper or cardboard sheets (1) on pallets (4) are known to have a vertically stationary conveyor (2) at a height above the maximum stack level above the floor and a storage platform (5) which can be raised and lowered upon which the stacks are formed. An optical sensor (17) which senses the stack level is arranged at the input side prior to the stacking area to control the lowering of the storage platform (5). According to the invention, at least three optical sensors (17) are disposed below the conveyor level at a slight distance from each other in a vertical line. The maximum vertical distance between the two sensors (17) is 20 mm. By activating any two sensors (17), the drop in height of the sheets (1) can be set depending on the type of sheet and without the need for extensive adjustment upon a change in the type of sheet.

Description

B E S C H R E I B U N G DESCRIPTION
Vorrichtung zum Stapeln von Bögen, insbesondere von geschuppt zugeförderten Papier- oder Kartonbögen auf PalettenDevice for stacking sheets, in particular sheets of paper or cardboard supplied on flakes on pallets
Technisches GebietTechnical field
Die Erfindung betrifft eine Vorrichtung zum Stapeln von Bögen, insbesondere von geschuppt zugeförderten Papier- oder Kartonbögen auf Paletten, gemäß dem Oberbegriff des Patentanspruchs 1 .The invention relates to a device for stacking sheets, in particular sheets or sheets of paper or cardboard that are fed in flakes on pallets, according to the preamble of patent claim 1.
Bekannterweise werden zum Stapeln von Bögen im Anschluß an eine Querschneidemaschine Vorrichtungen eingesetzt, die eine heb- und senkbare Ablageplattform aufweisen, auf die Paletten zur Aufnahme der Stapel aufgelegt werden. Die Bögen werden von einem vertikal ortsfesten, in einer Höhe oberhalb der maximalenAs is known, devices are used for stacking sheets following a cross cutting machine, which have a lifting and lowering storage platform on which pallets for receiving the stack are placed. The arches are of a vertically stationary, at a height above the maximum
Stapelhöhe über dem Boden angeordneten Zuförderer in den Stapelbereich gefördert und auf der Stapeloberseite abgelegt. Beim Stapeln wird die Ablageplattform entsprechend dem Höhenzuwachs des Stapeis kontinuierlich abgesenkt, damit die Fallhöhe der Bögen vom Zuförderer auf die Stapeloberseite für eine störungsfreie und kantengenaue Ablage im wesentlichen konstant bleibt.Stacking height above the floor is conveyed into the stacking area and placed on the top of the stack. When stacking, the storage platform is continuously lowered in accordance with the height increase of the stack so that the drop height of the sheets from the feed conveyor onto the top of the stack remains essentially constant for trouble-free and edge-accurate storage.
Für einen Stapelwechsel wird die Ablageplattform mit der vollen Palette bis in den Bodenbereich abgesenkt. Nach Abtransport der vollen Palette und Auflage einer neuen leeren Palette wird diese wieder bis knapp unterhalb der Zuförderebene angehoben. Damit bei einem Stapelwechsel die Zufuhr von Bögen nicht unterbrochen werden muß, sind Vorrichtungen mit einer Hilfsstapelplattform bekannt, die während des Abtransports der fertigen Stapel die sich bildenden Stapel trägt. Die leeren Paletten werden dann bis unmittelbar unterhalb der Hilfsstapelplattform bewegt und übernehmen den Teilstapel, der sich auf der Hilfsstapelplattform gebildet hat. Stand der TechnikFor a stack change, the storage platform with the full pallet is lowered into the floor area. After the full pallet has been removed and a new empty pallet has been placed on the pallet, it is raised again to just below the feed level. So that the supply of sheets does not have to be interrupted when changing stacks, devices are known with an auxiliary stacking platform which carries the stacks which form during the removal of the finished stacks. The empty pallets are then moved to immediately below the auxiliary stacking platform and take over the partial stack that has formed on the auxiliary stacking platform. State of the art
Aus der DE 38 23 806 C2 ist eine gattungsgemäße Stapelvorrichtung bekannt, bei der die Steuerung der Absenkbewegung der Ablageplattform mittels eines Lichttasters erfolgt, der einlaufseitig vor dem Stapelbereich angeordnet ist und die Stapelhöhe abtastet.From DE 38 23 806 C2 a generic stacking device is known in which the lowering movement of the storage platform is controlled by means of a light button which is arranged in front of the stacking area and which scans the stack height.
In der Praxis hat es sich gezeigt, daß die im wesentlichen konstant zu haltende Fallhöhe der Bögen in Abhängigkeit von der Papier- oder Kartonsorte unterschiedlich eingestellt werden muß. Bei einem Sortenwechsel muß daher der die gewünschte Stapelhöhe registrierende Lichttaster aufwendig in eine andere vertikale Position justiert werden.In practice it has been shown that the drop height of the sheets, which is to be kept essentially constant, must be set differently depending on the type of paper or cardboard. When changing the type, the light scanner that registers the desired stack height must therefore be laboriously adjusted to another vertical position.
Darstellung der ErfindungPresentation of the invention
Der Erfindung liegt die Aufgabe zugrunde, eine gattungsgemäße Stapelvorrichtung so zu verbessern, daß die Fallhöhe der Bögen ohne Aufwand einfach auf unterschiedliche Werte eingestellt werden kann.The invention has for its object to improve a generic stacking device so that the drop height of the sheets can be easily adjusted to different values without effort.
Diese Aufgabe wird mit den Merkmalen des Patentanspruchs 1 gelöst.This object is achieved with the features of patent claim 1.
Nach der Erfindung sind zumindest drei optische Sensoren für die Stapeloberseite vertikal übereinander angeordnet, die getrennt aktivierbar sind. Jeweils zwei ausgewählte Sensoren legen den Bereich der maximalen Fallhöhenabweichung fest und ermöglichen so eine Steuerung der Ablageplattform derart, daß ein oberer maximaler Wert nicht überschritten und ein unterer minimaler Wert nicht unterschritten wird.According to the invention, at least three optical sensors for the top of the stack are arranged vertically one above the other and can be activated separately. Two selected sensors each determine the range of the maximum drop height deviation and thus enable the storage platform to be controlled in such a way that an upper maximum value is not exceeded and a lower minimum value is not fallen below.
Die Unteransprüche enthalten bevorzugte, da besonders vorteilhafte Ausgestaltungen der Erfindung.The subclaims contain preferred, since particularly advantageous, embodiments of the invention.
Kurze Beschreibung der ZeichnungBrief description of the drawing
Die Zeichnung dient zur Erläuterung der Erfindung anhand eines vereinfacht dargestell- ten Ausführungsbeispiels. Figur 1 zeigt in einer Seitenansicht den prinzipiellen Aufbau einer Stapeivorrichtung nach der Erfindung.The drawing serves to explain the invention on the basis of a simplified exemplary embodiment. Figure 1 shows a side view of the basic structure of a stacking device according to the invention.
Figur 2 zeigt in vergrößerter Darstellung die Anordnung der optischen Sensoren relativ zum Stapel.Figure 2 shows an enlarged view of the arrangement of the optical sensors relative to the stack.
Figur 3 zeigt in einer Schrägansicht gegen die Bogenlaufrichtung die Anordnung der optischen Sensoren in der Ausstoßpartie.FIG. 3 shows the arrangement of the optical sensors in the ejection section in an oblique view against the direction of sheet travel.
Wege zur Ausführung der ErfindungWays of Carrying Out the Invention
Das nachfolgend beschriebene Ausführungsbeispiel dient zum Stapeln von kontinuierlich in Schuppenform angeförderten Papierbögen 1 im Anschluß an eine Querschnei- demaschine. Die Bögen 1 werden dem Stapelbereich von einem als Bandförderer ausgebildeten Zuförderer 2 zugefördert, der in einer Höhe oberhalb der maximalen Stapelhöhe über dem Boden angeordnet ist. Die Stapel 3 werden auf Paletten 4 gebildet, die auf eine Ablageplattform 5 aufgelegt werden. Die Ablageplattform 5 ist im Gestell 6 der Stapelvorrichtung an Zugketten 8 aufgehängt. Sie kann mittels der Zugketten 8 vom Flurbereich bis in den Bereich der Zuförderebene 7 der Bögen 1 angehoben und abgesenkt werden. Weiterhin weist die Stapelvorrichtung die bekannten Elemente für eine kantengenaue Ablage der Bögen 1 auf dem Stapel 3 auf: Ein Anschlagbrett 9 für die Bogenvorderkanten und Seitenschüttelbleche 10, die auf die Bogenlängskanten einwirken.The exemplary embodiment described below is used for stacking paper sheets 1 which are continuously conveyed in the form of scales following a cross-cutting machine. The sheets 1 are fed to the stacking area by a feed conveyor 2 designed as a belt conveyor, which is arranged at a height above the maximum stacking height above the floor. The stacks 3 are formed on pallets 4, which are placed on a storage platform 5. The storage platform 5 is suspended in the frame 6 of the stacking device on pull chains 8. It can be raised and lowered by means of the pull chains 8 from the corridor area to the area of the feed level 7 of the sheets 1. Furthermore, the stacking device has the known elements for the edge-accurate depositing of the sheets 1 on the stack 3: a notice board 9 for the sheet leading edges and side shaking plates 10, which act on the sheet longitudinal edges.
Zwischen dem von der auslaufseitigen Umlenkrolle 1 1 gebildeten Ende des Bandförderers 2 und dem Stapelbereich ist in Höhe der Zuförderebene die sogenannte Ausstoßpartie angeordnet, deren Elemente eine störungsfreie Übergabe der Bögen 1 auf den Stapel 3 gewährleisten. Der Bereich der Ausstoßpartie ist in Figur 3 vergrößert dargestellt. Im Anschluß an den Bandförderer 2 ist eine starre, sich von der Zuförderebene senkrecht nach unten erstreckende Platte 12 angeordnet, die den Stapelbereich einlaufseitig begrenzt. An der Platte 12 werden die Bogenhinterkanten ausgerichtet. In Höhe der Zuförderebene 7 weist die Platte 12 Aussparungen auf, in der Ausstoßrollen 13 gelagert sind, die gemeinsam mit in Bogenlaufrichtung blasenden Blasdüsen 1 einen sicheren Transport der Bögen 1 in den Stapelbereich gewährleisten. Zwischen den Ausstoßrollen 1 3 befinden sich weitere AussparungenBetween the end of the belt conveyor 2 formed by the outlet-side deflecting roller 11 and the stacking area, the so-called ejection section is arranged at the level of the feed plane, the elements of which ensure a trouble-free transfer of the sheets 1 onto the stack 3. The area of the ejection section is shown enlarged in FIG. 3. Connected to the belt conveyor 2 is a rigid plate 12, which extends vertically downward from the feed plane and which delimits the stack area on the inlet side. The trailing edges of the sheet are aligned on the plate 12. At the level of the infeed plane 7, the plate 12 has cutouts in which ejection rollers 13 are mounted, which together with blowing nozzles 1 blowing in the sheet running direction ensure safe transport of the sheets 1 into the stacking area guarantee. There are further recesses between the ejection rollers 1 3
1 5, von denen eine zum Einbau der nachfolgend näher beschriebenen Einrichtung zur Stapelhöhenabtastung genutzt wird.1 5, one of which is used to install the device for stack height sensing described in more detail below.
Die Einrichtung zur Stapelhöhenabtastung besteht aus einem kastenförmigen GehäuseThe device for stack height scanning consists of a box-shaped housing
1 6, in dessen dem Stapelbereich zugewandten Frontseite zumindest drei, im Ausführungsbeispiel fünf optische Sensoren 1 7 vertikal übereinander angeordnet sind. Bevorzugt werden als optische Sensoren 1 7 Reflexions-Lichttaster verwendet, bei denen Lichtsender und Lichtempfänger sich in einem Gehäuse (Gehäuse 1 5) befinden. Der vertikale Abstand zwischen zwei Sensoren 17 beträgt maximal 20 mm, bevorzugt zwischen 5 mm und 10 mm, im vorliegenden Beispiel 7,5 mm. Der oberste Sensor 17 befindet sich mit geringem Abstand unterhalb der Zuförderebene, wobei der Abstand ausreichend groß ist, um die Aufwärtsbewegung der Plattform 5 so frühzeitig abstoppen zu können, daß die Stapeloberseite unterhalb der Zuförderebene 7 bleibt. Die vertikale Position des obersten Sensors 17 ist daher so gewählt, daß unabhängig von dem abzustapelnden Blattmaterial die Stapeloberseite so gesteuert werden kann, daß sie den gewünscht minimalen Abstand zur Zuförderebene 7 nicht unterschreitet. Im Ausführungsbeispiel befindet sich der oberste Sensor 1 7 10 mm unterhalb der Zuförderebene 7.1 6, in whose front side facing the stacking area at least three, in the exemplary embodiment five optical sensors 17 are arranged vertically one above the other. Preferably 7 7 reflection light sensors are used as optical sensors, in which the light transmitter and light receiver are located in one housing (housing 1 5). The vertical distance between two sensors 17 is a maximum of 20 mm, preferably between 5 mm and 10 mm, in the present example 7.5 mm. The uppermost sensor 17 is located at a short distance below the feed plane, the distance being large enough to be able to stop the upward movement of the platform 5 early enough for the top of the stack to remain below the feed plane 7. The vertical position of the uppermost sensor 17 is therefore selected such that the top of the stack can be controlled independently of the sheet material to be stacked so that it does not fall below the desired minimum distance from the feed plane 7. In the exemplary embodiment, the uppermost sensor 1 7 is 10 mm below the feed plane 7.
Wie in Figur 3 dargestellt, sind die Sensoren 17 versetzt in zwei vertikalen Linien angeordnet, damit der gewünscht geringe vertikale Abstand zweier Sensoren 1 7 voneinander erreicht wird. Die Signalleitungen 1 8 befinden sich im Gehäuse 1 5, das an eine nicht dargestellte Steuereinrichtung zur Steuerung der Vertikalbewegung der Ablageplattform 5 angeschlossen ist.As shown in Figure 3, the sensors 17 are arranged offset in two vertical lines so that the desired small vertical distance between two sensors 17 is achieved. The signal lines 1 8 are in the housing 1 5, which is connected to a control device, not shown, for controlling the vertical movement of the storage platform 5.
Beim Betrieb der Stapelvorrichtung werden zwei der fünf Sensoren 1 7 aktiviert, die übrigen sind inaktiv. Der obere der beiden aktiven Sensoren 1 7 bestimmt den minimalen Abstand der Stapeloberseite von der Zuförderebene 7, der untere aktive Sensor 17 den maximalen Abstand. Die vertikale Position der Stapeloberseite wird durch eine vertikale Bewegung der Ablageplattform 5 so gesteuert, daß sie im wesentlichen in dem gewünschten vertikalen Bereich zwischen den beiden aktiven Sensoren 1 7 gehalten wird. Die Steuerung erfolgt zweckmäßigerweise über eine Zwei-Punkt-Regelung, die bei einer Überschreitung der oberen Position nach oben eine Absenkbewegung und bei einer Unterschreitung der unteren Position nach unten eine Anhebebewegung der Ablageplattform 5 auslöst.When the stacking device is in operation, two of the five sensors 17 are activated, the rest are inactive. The upper of the two active sensors 17 determines the minimum distance of the top of the stack from the feed plane 7, and the lower active sensor 17 determines the maximum distance. The vertical position of the top of the stack is controlled by a vertical movement of the storage platform 5 so that it is held essentially in the desired vertical area between the two active sensors 17. The control is expediently carried out via a two-point control, which is one when the upper position is exceeded Lowering movement and when falling below the lower position triggers a lifting movement of the storage platform 5.
Muß bei einem Sortenwechsel der zu stapelnden Bögen 1 eine andere Fallhöhe und/oder ein anderer Bereich der akzeptablen Fallhöhendifferenz eingestellt werden, werden die zwei entsprechenden Sensoren 1 7 aktiviert. Bei der einfachsten Form mit drei Sensoren 1 7 lassen sich sowohl die minimale Fallhöhe als auch der Regeibereich der Fallhöhe auf zwei unterschiedliche Werte einstellen. Bei einer Verwendung von fünf Sensoren, wie im Ausführungsbeispiel, ist eine Vielzahl von Möglichkeiten gegeben, die Fallhöhe sortenabhängig durch Aktivierung zweier Sensoren 17 in einem Bereich zu steuern, bei dem eine störungsfreie Ablage der Bögen 1 möglich ist. Es ist somit nicht erforderlich, die die Stapelhöhe abtastenden Sensoren 1 7 bei einem Sortenwechsel aufwendig zu justieren. Es brauchen nur die beiden passenden Sensoren 1 7 aktiviert zu werden. If a different drop height and / or a different range of the acceptable drop height difference has to be set when the sheets 1 to be stacked are changed, the two corresponding sensors 17 are activated. In the simplest form with three sensors 1 7, both the minimum drop height and the control range of the drop height can be set to two different values. When using five sensors, as in the exemplary embodiment, there are a multitude of possibilities for controlling the drop height, depending on the type, by activating two sensors 17 in an area in which the sheets 1 can be deposited without problems. It is therefore not necessary to adjust the sensors 1 7 scanning the stack height in a complex manner when changing the grade. Only the two suitable sensors 1 7 need to be activated.

Claims

PATENTANSPRÜCHE PATENT CLAIMS
1.1.
Vorrichtung zum Stapeln von Bögen (1), insbesondere von geschuppt zugeförderten Papier- oder Kartonbögen, auf Paletten (4), mit einem vertikal ortsfesten, in einer Höhe oberhalb der maximalen Stapelhöhe über dem Boden angeordneten Zuförderer (2) für die Bögen (1), einer heb- und senkbaren Ablageplattform (5), auf der die Stapel (3) gebildet werden, und mit einem die Stapelhöhe abtastenden optischen Sensor (17), der einlaufseitig vor dem Stapelbereich angeordnet ist, d ad u rc h g e ken nzei c h n et, daß mit geringem Abstand unterhalb derDevice for stacking sheets (1), in particular sheets of paper or cardboard conveyed in shingled form, on pallets (4), with a vertically stationary feed conveyor (2) for the sheets (1) arranged at a height above the maximum stacking height above the floor. , a storage platform (5) that can be raised and lowered, on which the stacks (3) are formed, and with an optical sensor (17) that scans the stack height and is arranged in front of the stacking area on the inlet side that with a short distance below the
Zuförderebene (7) zumindest drei optische Sensoren (17) jeweils vertikal übereinander angeordnet sind, wobei der vertikale Abstand zwischen zwei Sensoren (17) maximal 20 mm beträgt.Feed level (7) at least three optical sensors (17) are each arranged vertically one above the other, the vertical distance between two sensors (17) being a maximum of 20 mm.
2.2.
Vorrichtung nach Anspruch 1, d ad u rch g e ken nze i c h n et, daß der vertikale Abstand zwischen zwei Sensoren (17) zwischen 5 mm und 10 mm beträgt.Device according to claim 1, characterized in that the vertical distance between two sensors (17) is between 5 mm and 10 mm.
3.3.
Vorrichtung nach Anspruch 1 oder 2, d ad u rc h g e ke n n ze i ch net, daß als Sensoren (17) Reflexions-Lichttaster verwendet werden. Device according to claim 1 or 2, characterized in that reflection light sensors are used as sensors (17).
4.4.
Verfahren zur Steuerung der Stapelhöhe in einer Stapelvorrichtung, dadurch gekennzeichnet, daß von zumindest drei mit geringem Abstand unterhalb der Zuförderebene (7) vertikal übereinander angeordneten optischen Sensoren (17) jeweils zwei in dem erforderlichen Fallhöhenbereich angeordnete Sensoren (17) aktiviert werden und mit einer Zwei-Punkt-Regelung die Stapeloberseite im wesentlichen im Bereich zwischen den beiden aktiven Sensoren (17) gehalten wird. Method for controlling the stack height in a stacking device, characterized in that of at least three optical sensors (17) arranged vertically one above the other at a short distance below the feed level (7), two sensors (17) arranged in the required fall height range are activated and with a two -Point control, the top of the stack is essentially held in the area between the two active sensors (17).
EP98910737A 1997-03-19 1998-03-07 Device for stacking sheets, in particular sheet-fed paper or cardboard sheets delivered onto pallets Expired - Lifetime EP0968128B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19711406A DE19711406C1 (en) 1997-03-19 1997-03-19 Method and device for stacking sheets, in particular sheets of paper or cardboard that are fed in flakes on pallets
DE19711406 1997-03-19
PCT/EP1998/001342 WO1998041465A1 (en) 1997-03-19 1998-03-07 Device for stacking sheets, in particular sheet-fed paper or cardboard sheets delivered onto pallets

Publications (2)

Publication Number Publication Date
EP0968128A1 true EP0968128A1 (en) 2000-01-05
EP0968128B1 EP0968128B1 (en) 2002-06-05

Family

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Application Number Title Priority Date Filing Date
EP98910737A Expired - Lifetime EP0968128B1 (en) 1997-03-19 1998-03-07 Device for stacking sheets, in particular sheet-fed paper or cardboard sheets delivered onto pallets

Country Status (5)

Country Link
US (1) US6318954B1 (en)
EP (1) EP0968128B1 (en)
DE (2) DE19711406C1 (en)
ES (1) ES2182286T3 (en)
WO (1) WO1998041465A1 (en)

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US7132161B2 (en) * 1999-06-14 2006-11-07 Energy Science Laboratories, Inc. Fiber adhesive material
DE10023807A1 (en) * 2000-05-15 2001-11-22 Nexpress Solutions Llc Stack height detection and stack height control
EP1348661B1 (en) * 2002-03-29 2006-12-06 Océ-Technologies B.V. Position detector
JP2003307402A (en) 2002-03-29 2003-10-31 Oce Technologies Bv Position detector
US7344062B2 (en) * 2002-12-06 2008-03-18 First Data Corporation Systems for preparing presentation instruments for distribution
US6817518B2 (en) * 2002-12-06 2004-11-16 First Data Corporation Systems for preparing presentation instruments for distribution
CN1817771A (en) * 2004-10-08 2006-08-16 海德堡印刷机械股份公司 Device for holding single paper to paper pile
CH697495B1 (en) * 2005-04-01 2008-11-14 Baumer Electric Ag Optical sensor and method for suppressing stray light errors.
US9150382B2 (en) * 2012-04-02 2015-10-06 Alliance Machine Systems International, Llc Apparatus and method for feeding and conveying items

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US4027580A (en) * 1975-11-21 1977-06-07 Conwed Corporation Pad stacker
DE3400343C2 (en) 1984-01-07 1986-11-27 Werner H.K. Peters Maschinenfabrik Gmbh, 2000 Hamburg Conveyor device to a format stacker for corrugated cardboard sections behind a cross cutter
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Also Published As

Publication number Publication date
DE59804326D1 (en) 2002-07-11
DE19711406C1 (en) 1998-10-01
WO1998041465A1 (en) 1998-09-24
ES2182286T3 (en) 2003-03-01
US6318954B1 (en) 2001-11-20
EP0968128B1 (en) 2002-06-05

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