EP0434961B1 - Apparatus for transferring flat objects, especially folding boxes - Google Patents

Apparatus for transferring flat objects, especially folding boxes Download PDF

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Publication number
EP0434961B1
EP0434961B1 EP90121930A EP90121930A EP0434961B1 EP 0434961 B1 EP0434961 B1 EP 0434961B1 EP 90121930 A EP90121930 A EP 90121930A EP 90121930 A EP90121930 A EP 90121930A EP 0434961 B1 EP0434961 B1 EP 0434961B1
Authority
EP
European Patent Office
Prior art keywords
rotor
crank
suction
suction heads
folding
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.)
Expired - Lifetime
Application number
EP90121930A
Other languages
German (de)
French (fr)
Other versions
EP0434961A1 (en
Inventor
Walter Dietrich
Eberhard Dipl.-Ing. Krieger
Siegfried Dipl.-Ing. Weber
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0434961A1 publication Critical patent/EP0434961A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/12—Feeding flexible bags or carton blanks in flat or collapsed state; Feeding flat bags connected to form a series or chain
    • B65B43/14—Feeding individual bags or carton blanks from piles or magazines
    • B65B43/16—Feeding individual bags or carton blanks from piles or magazines by grippers
    • B65B43/18—Feeding individual bags or carton blanks from piles or magazines by grippers by suction-operated grippers
    • B65B43/185—Feeding individual bags or carton blanks from piles or magazines by grippers by suction-operated grippers specially adapted for carton blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/26—Opening or distending bags; Opening, erecting, or setting-up boxes, cartons, or carton blanks
    • B65B43/265—Opening, erecting or setting-up boxes, cartons or carton blanks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2120/00—Construction of rigid or semi-rigid containers
    • B31B2120/30—Construction of rigid or semi-rigid containers collapsible; temporarily collapsed during manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/74—Auxiliary operations
    • B31B50/76—Opening and distending flattened articles
    • B31B50/80—Pneumatically
    • B31B50/804—Pneumatically using two or more suction devices on a rotating element

Definitions

  • the invention relates to a device for removing flat objects, in particular flat-lying folding boxes, from a delivery station and for transferring them to a receiving station according to the preamble of claim 1.
  • DE-A 25 47 132 and EP-A 134 628 known device of this type run around two diametrically opposed suction heads on a triangular cycloid path, which has three reversal points with concave curves in between.
  • This cam track is produced in that the distance between the suction heads and the axis of rotation of the rotor carrying them is twice the eccentricity of the crank carrying the rotor and the transmission ratio between the sun gear and the planet gear is 3: 2.
  • the device is arranged so that a reversal point of the triangular cycloid path points downward and this reversal point is assigned to the receiving station, for example a horizontally running conveyor chain with drivers of a cartoning machine.
  • the delivery station which belongs to a storage magazine for the objects to be transferred lying flat, is one of the other two reversal points assigned to the cycloidal path, in such a way that the front of the magazine and thus the plane of the foremost object to be removed lies transversely to the direction of movement of a suction head at the reversal point, that is to say is arranged at an angle of 60 degrees to the horizontal.
  • the known devices can be used for transferring folding boxes, but they have some disadvantages.
  • a major disadvantage is that the magazine for the folding box supply extends over the conveying path of the erected folding boxes, that is to say over the working area of the cartoning machine.
  • monitoring and ongoing loading of folding boxes is only possible with disabilities.
  • the fact that the cartons slide in the magazine is not always safe because of their 30 degree inclination, so that the machine can malfunction.
  • the device according to the invention with the characterizing features of claim 1 has the advantage that the magazine opposite the receiving station is aligned vertically with horizontally lying folding boxes, so that it is the conveyor of the cartoning machine from all sides, in particular from a point of view in front of the folding box , that can be loaded from one end of the cartoning machine, and that the folding boxes can slide into it without hindrance.
  • Another advantage is that the small rotation angle of the suction heads enables high cycle rates when transferring the folding boxes. Because between the delivery station and the receiving station Another turning point for the suction heads is available, a relatively long period of time is available for erecting the folding boxes.
  • the embodiment according to claim 2 is particularly advantageous, as a result of the loop-shaped path at the reversal point at the delivery station, it is possible to start very cheaply without transverse displacement of a suction head on the lowest folding box to be removed, and to safely pull the folding boxes out of the retention tabs of the magazine.
  • the design of the device according to claim 3 creates a flattening of the point of reversal of the suction heads in the region of the receiving station, so that the transfer speed of the folding boxes is adapted to the speed of the conveying device of the cartoning machine.
  • folding boxes are erected in a safe and path-dependent manner, so that in any case they are handed over to the downstream conveying device fully open.
  • This path-dependent erection makes it possible to assign the device to fixed guides and folding elements with which the folding tabs protruding from the ends of the folding boxes can be treated, in particular brought into a position which is favorable for further processing.
  • the precise control of the pressure fingers is possible in a simple manner.
  • the embodiment according to claim 8 is also very advantageous, since it ensures that wide folding boxes are held securely when erected.
  • FIG. 1 shows a folding box transfer device in front view in a first working position
  • FIG. 2 shows the device according to FIG. 1 in a second working position
  • FIG. 3 shows the device according to FIG. 1 and FIG. 2 in longitudinal section in the plane III-III of FIG the part delimited by II is shown angularly offset.
  • the folding box transfer device is arranged between a magazine 10 with a delivery station A for flat-lying folding boxes 1 and a conveyor device 15 equipped with drivers 16, 17 with a transfer station B of a cartoning machine.
  • the magazine 10 which has lateral boundaries 11 with retaining lugs 12 at the lower end, is perpendicular to the horizontal with its axis
  • the conveying path of the conveying device 15 is aligned so that the flat-lying folding boxes 1 to be transferred lie horizontally one above the other in the magazine 10, the lowest one being located in the delivery station A.
  • the device has three suction heads 22 on a rotor 20, which protrude radially outward on the circumference of the rotor 20 by 120 degrees.
  • Each suction head 22 comprises two pairs of suction cups 23, 24, each of which a pair are axially congruently arranged at the ends of two holding stars 25, which are also fastened congruently on a central shaft 26 of the rotor 20.
  • the holding stars 25 on the shaft 26 are preferably axially adjustable so that the distance between the pairs of suction cups can be adapted to the length of the folding boxes to be treated.
  • the retaining stars 25 are secured by a key 27 in the shaft 26 against rotation and clamped with screws 28.
  • the suction heads 22 are guided for transferring folding boxes 1 from the delivery station A of the magazine 10 to the receiving station B of the conveying device 15 on a cycloid track C, with a point approximately in the middle between the two suckers 23, 24 of a pair of tracks with four reversal points F , G, H, I with concave curves in between.
  • the shaft 26 of the rotor 20 which is arranged like a planetary part, is connected coaxially to the eccentric crank pin 31 of a crank 30 designed as a planet carrier.
  • This crank pin 31 which is rotatably mounted in the crank with an eccentricity E to the axis of the drive shaft 32 of the crank 30, carries a planetary gear 33 which meshes with an intermediate wheel 34 which is also rotatably mounted in the crank 30.
  • This intermediate wheel 34 is also in engagement with a sun gear 35, which is fixedly connected to the bearing eye 36 of the frame 37, in which the drive shaft 32 of the crank 30 is mounted.
  • the gear ratio between the sun gear 35 and the planet gear 33 is 4: 3.
  • the radial distance D of the suction surface of the individual suction heads 22 to the axis of the rotor 20, which is coaxial to the axis of the crank pin 31 of the crank 30, is in the range of three times the eccentricity E of the crank pin 31 to the axis of rotation of the crank 30.
  • the distance between the delivery station A of the magazine 10 from the receiving station B on the conveyor device 15 is twice the sum of the eccentricity E of the crank 30 and the distance D of the suction heads 22 from the axis of the rotor 20 or from the axis of the crank pin 31.
  • the crank 30 is driven counter (arrow K) to the direction of movement of the suction heads 22 (arrows M).
  • the crank 30 is rotated through a rotation angle of 360 degrees per transfer of a folding box (work cycle).
  • the crank 30 is rotated 540 degrees.
  • a suction head 22 is used for the point in the middle between two suction cups 23, 24 a square cycloid path C is generated, in which the reversal points F, G, H, I are clearly designed as end points.
  • the distance D of the suction surface to the axis of the rotor 20 is chosen to be less than three times the eccentricity E of the crank 30, preferably 2.75 times.
  • the distance between the delivery station A and the receiving station B must be adjusted accordingly.
  • Grinding and flattening in the area of the reversal points of the cycloid path C of the suction heads 22 can also be produced by turning the sun gear 35 of the planetary gear.
  • the sun gear 35 described above as being stationary is set in a torsional vibration coordinated with the working cycle of the device by a certain angle, so that in the reversal point F at the delivery station A a loop and in the opposite reversal point H at the receiving station B a flattening in the area of these reversal points comes about.
  • the loop is advantageous when removing a folding box from the magazine.
  • the flattening at the receiving station B makes it advantageous to transfer the transferred folding boxes into the conveyor device 15 moving at a uniform speed by adjusting the speed.
  • each pair of suction cups 23, 24 of the suction heads 22 is assigned a press-on finger 40 so that it can pivot.
  • the press-on fingers 40 which are also arranged in pairs, are pivoted when a folding box 1 is transferred against the adjacent wall 3 connected to the wall 2 held by the suction cups 23, 24 via a folding line, so that a roller 41 arranged on its free, angled end is attached to the wall 3 the folding box 1 fits upright (Fig. 1 and Fig. 2).
  • the press-on fingers 40 are rotatably mounted in the holding stars 25 with eyes 42, which are penetrated in pairs by a square shaft 43 which is axially parallel to the shaft 26.
  • the square shafts 43 which are also rotatably mounted in a disk 44 which is firmly connected to the shaft 27 by clamping with a screw 47 against the key 27, carry a lever 45 with a roller 46 on a swivel of the pressing fingers 40 at its end close to the crank 30 Curve groove 51 of a control disc 50 is guided.
  • the control disk 50 is rotatably mounted on the shaft 26 and is fixedly connected to a coupling 52 which is articulated on a rocker 53 mounted on the frame, so that the control disk 50 rotates on the circular path K of the crank pin 31 when the crank 30 is rotated, however does not rotate with the rotor 20, but stands still relative to this.
  • the lever 45 is pivoted so that the pressure fingers 40 on the rail section from the delivery station A to the receiving station B against the folding box 1 held by the associated suction heads 22, and on the rail section from the receiving station B and the delivery station A swivel back.
  • the folding boxes 1 can not only be erected into a rectangle, but can also be deformed into a parallelogram, so that the folding lines between the individual walls are broken and tensions are reduced.
  • control disc 50 is open towards the disc 44 and is arcuate Control grooves 55, 56 are arranged radially within the cam groove 51.
  • One control groove 55 is connected via bores 57, 58 to a line 59 leading to a vacuum source and the other 56 is connected to the ambient air via a bore 60.
  • three bores are arranged offset by 120 degrees on the disk 44, from which lines 61, 62 lead to the suction cups 23, 24 of the associated suction heads.
  • a suction head 22 has two suction cups 23, 24 on two holding stars 25.
  • the shaft 26, which carries the rotor 20, the disk 44 and the control disk 50 is designed as an exchangeable part.
  • it has at its end near the crank 30 a flange 65 which is clamped by means of a screw 66 in a stepped axial bore 67 of the shaft 26 against an adapted flange 68 on the crank pin 31.
  • a protruding index pin 70 on the flange 68 and a corresponding fitting bore 71 on the flange 65 ensure that the rotor 20 is positioned on the crank pin 30 with precise angles.
  • a counter suction device 75 can also be assigned to the rotor 20.
  • the counter suction device 75 attached to a lever 76 is arranged in the region of the reversal point G between the delivery station A and the receiving station B. Its lever 76 is moved in a controlled manner so that when a folding box 1 enters the reversal point G it detects the wall 4 which is opposite the wall 2 detected by the suction cups 23, 24 of a suction head 22, and by movement this wall 4 detects it 2 moves away.
  • the counter suction 75 supports the press-on fingers 40 and ensures their effectiveness.

Description

Stand der TechnikState of the art

Die Erfindung geht aus von einer Vorrichtung zum Entnehmen flacher Gegenstände, insbesondere flachliegender Faltschachteln, aus einer Abgabestation und zum Überführen dieser zu einer Aufnahmestation nach dem Oberbegriff des Anspruchs 1. Bei beispielsweise durch die DE-A 25 47 132 und die EP-A 134 628 bekannt gewordenen Vorrichtung dieser Art laufen zwei diametral einander gegenüberliegende Saugköpfe auf einer dreieckförmigen Zykloidenbahn um, die drei Umkehrpunkte mit dazwischenliegenden konkaven Kurvenbögen hat. Diese Kurvenbahn wird dadurch erzeugt, daß der Abstand der Saugköpfe zur Drehachse des sie tragenden Rotors das Zweifache der Exzentrizität der den Rotor tragenden Kurbel und das Übersetzungsverhältnis zwischen dem Sonnenrad und dem Planetenrad 3 : 2 beträgt. Die Vorrichtung ist so angeordnet, daß ein Umkehrpunkt der dreieckförmigen Zykloidenbahn nach unten weist und diesem Umkehrpunkt die Aufnahmestation, beispielsweise eine waagrecht verlaufende Förderkette mit Mitnehmern einer Kartoniermaschine, zugeordnet ist. Die Abgabestation, die zu einem Vorratsmagazin für die zu überführenden, flachliegenden Gegenstände gehört, ist einem der beiden anderen Umkehrpunkte der Zykloidenbahn zugeordnet, und zwar so, daß die Stirnseite des Magazins und damit die Ebene des vordersten zu entnehmenden Gegenstandes quer zur Bewegungsrichtung eines Saugkopfes im Umkehrpunkt liegt, also in einem Winkel von 60 Grad zur Waagrechten angeordnet ist.The invention relates to a device for removing flat objects, in particular flat-lying folding boxes, from a delivery station and for transferring them to a receiving station according to the preamble of claim 1. In, for example, DE-A 25 47 132 and EP-A 134 628 known device of this type run around two diametrically opposed suction heads on a triangular cycloid path, which has three reversal points with concave curves in between. This cam track is produced in that the distance between the suction heads and the axis of rotation of the rotor carrying them is twice the eccentricity of the crank carrying the rotor and the transmission ratio between the sun gear and the planet gear is 3: 2. The device is arranged so that a reversal point of the triangular cycloid path points downward and this reversal point is assigned to the receiving station, for example a horizontally running conveyor chain with drivers of a cartoning machine. The delivery station, which belongs to a storage magazine for the objects to be transferred lying flat, is one of the other two reversal points assigned to the cycloidal path, in such a way that the front of the magazine and thus the plane of the foremost object to be removed lies transversely to the direction of movement of a suction head at the reversal point, that is to say is arranged at an angle of 60 degrees to the horizontal.

Die bekannten Vorrichtungen sind zum Überführen von Faltschachteln zwar brauchbar, haben jedoch einige Nachteile. Ein wesentlicher Nachteil besteht darin, daß sich das Magazin für den Faltschachtelvorrat über der Förderstrecke der aufgerichteten Faltschachteln, also über den Arbeitsbereich der Kartoniermaschine erstreckt. Dadurch ist eine Überwachung und das laufende Beladen mit Faltschachteln nur mit Behinderungen möglich. Ferner ist das Nachrutschen der Faltschachteln im Magazin wegen dessen 30 Grad-Schräglage nicht immer sicher, so daß es zu Störungen der Maschine kommen kann. Außerdem steht insbesondere bei der Vorrichtung nach der DE-A 25 47 132 nur eine sehr kurze Zeitdauer zum Aufrichten der Faltschachteln während deren Überführen aus dem Magazin in die Fördereinrichtung der Kartoniermaschine zur Verfügung.The known devices can be used for transferring folding boxes, but they have some disadvantages. A major disadvantage is that the magazine for the folding box supply extends over the conveying path of the erected folding boxes, that is to say over the working area of the cartoning machine. As a result, monitoring and ongoing loading of folding boxes is only possible with disabilities. Furthermore, the fact that the cartons slide in the magazine is not always safe because of their 30 degree inclination, so that the machine can malfunction. In addition, in particular in the device according to DE-A 25 47 132, there is only a very short period of time for erecting the folding boxes during their transfer from the magazine into the conveying device of the cartoning machine.

Vorteile der ErfindungAdvantages of the invention

Die erfindungsgemäße Vorrichtung mit den kennzeichnenden Merkmalen des Anspruchs 1 hat demgegenüber den Vorteil, daß das der Aufnahmestation gegenüberliegende Magazin senkrecht mit waagrecht darin liegenden Faltschachteln ausgerichtet ist, so daß es von allen Seiten aus, insbesondere von einem Standpunkt vor der Faltschachtel eines die Fördereinrichtung der Kartoniermaschine, also von einem Ende der Kartoniermaschine beschickt werden kann, und daß darin die Faltschachteln ohne Behinderung nachrutschen können. Als weiterer Vorteil ist anzusehen, daß durch die kleinen Drehwinkel der Saugköpfe hohe Taktzahlen beim Überführen der Faltschachteln möglich sind. Da zwischen der Abgabestation und der Aufnahmestation ein weiterer Umkehrpunkt für die Saugköpfe vorhanden ist, steht für das Aufrichten der Faltschachteln eine verhältnismäßig lange Zeitdauer zur Verfügung. Wenn diesem Umkehrpunkt ein Gegensauger zugeordnet wird, können auch schwierig zu öffnende Faltschachteln, beispielsweise solche mit quadratischem Querschnitt, sicher aufgerichtet werden. Hinsichtlich der bekannten Vorrichtungen nach der DE-A 25 47 132 und der EP-A 1 34 628 und auch gegenüber anderen denkbaren Vorrichtungen dieser Art mit anderen Längen- und Übersetzungsverhältnissen der Glieder, die in sich geschlossene Zykloidenbahnen für die Saugköpfe erzeugen stellt die erfindungsgemäße Vorrichtung bei gleichen Einbaumaßen hinsichtlich der erzielbaren Ausbringung von Faltschachteln und einer sicheren Funktion ein Optimum dar.The device according to the invention with the characterizing features of claim 1 has the advantage that the magazine opposite the receiving station is aligned vertically with horizontally lying folding boxes, so that it is the conveyor of the cartoning machine from all sides, in particular from a point of view in front of the folding box , that can be loaded from one end of the cartoning machine, and that the folding boxes can slide into it without hindrance. Another advantage is that the small rotation angle of the suction heads enables high cycle rates when transferring the folding boxes. Because between the delivery station and the receiving station Another turning point for the suction heads is available, a relatively long period of time is available for erecting the folding boxes. If a counter suction device is assigned to this reversal point, it is also possible to safely erect folding boxes that are difficult to open, for example those with a square cross section. With regard to the known devices according to DE-A 25 47 132 and EP-A 1 34 628 and also compared to other conceivable devices of this type with different length and ratio ratios of the links that produce self-contained cycloid tracks for the suction heads, the device according to the invention with the same installation dimensions in terms of the achievable output of folding boxes and a safe function is an optimum.

Durch die in den Unteransprüchen aufgeführten Maßnahmen sind vorteilhafte Weiterbildungen und Verbesserungen der im Anspruch 1 angegebenen Vorrichtung möglich.Advantageous further developments and improvements of the device specified in claim 1 are possible through the measures listed in the subclaims.

Besonders vorteilhaft ist die Ausgestaltung nach Anspruch 2, durch die aufgrund der schleifenförmigen Bahn im Umkehrpunkt bei der Abgabestation ein sehr günstiges Anlaufen ohne Querverschiebung eines Saugkopfes an der untersten, zu entnehmenden Faltschachtel sowie ein sicheres Herausziehen der Faltschachteln aus den Rückhaltenasen des Magazins möglich ist.The embodiment according to claim 2 is particularly advantageous, as a result of the loop-shaped path at the reversal point at the delivery station, it is possible to start very cheaply without transverse displacement of a suction head on the lowest folding box to be removed, and to safely pull the folding boxes out of the retention tabs of the magazine.

Durch die Ausgestaltung der Vorrichtung nach Anspruch 3 wird eine Abflachung des Umkehrpunktes der Saugköpfe im Bereich der Aufnahmestation geschaffen, so daß die Übergabegeschwindigkeit der Faltschachteln an die Geschwindigkeit der Fördervorrichtung der Kartoniermaschine angepaßt wird.The design of the device according to claim 3 creates a flattening of the point of reversal of the suction heads in the region of the receiving station, so that the transfer speed of the folding boxes is adapted to the speed of the conveying device of the cartoning machine.

Durch die Maßnahme nach Anspruch 4 werden Faltschachteln sicher und wegabhängig gesteuert aufgerichtet, so daß sie in jedem Fall voll geöffnet in die nachgeschaltete Fördervorrichtung übergeben werden. Dieses wegabhängige Aufrichten macht es möglich, der Vorrichtung ortsfeste Führungen und Faltelemente zuzuordnen, mit denen die an den Enden der Faltschachteln abstehenden Faltlaschen behandelt, insbesondere in eine für das Weiterverarbeiten günstige Lage gebracht werden können. Mit der Anordnung einer Kurvenscheibe nach Anspruch 5 ist das präzise Steuern der Aufdrückfinger in einfacher Weise möglich.By the measure according to claim 4, folding boxes are erected in a safe and path-dependent manner, so that in any case they are handed over to the downstream conveying device fully open. This path-dependent erection makes it possible to assign the device to fixed guides and folding elements with which the folding tabs protruding from the ends of the folding boxes can be treated, in particular brought into a position which is favorable for further processing. With the arrangement of a cam plate according to claim 5, the precise control of the pressure fingers is possible in a simple manner.

Sehr vorteilhaft ist auch die Ausgestaltung nach Anspruch 8, da dadurch breite Faltschachteln beim Aufrichten sicher gehalten werden.The embodiment according to claim 8 is also very advantageous, since it ensures that wide folding boxes are held securely when erected.

Zeichnungdrawing

Ein Ausführungsbeispiel der Erfindung ist in der Zeichnung dargestellt und wird im folgenden näher beschrieben. Es zeigen Figur 1 eine Faltschachtel-Überführvorrichtung in Vorderansicht in einer ersten Arbeitsstellung, Figur 2 die Vorrichtung gemäß Figur 1 in einer zweiten Arbeitsstellung und Figur 3 die Vorrichtung nach Figur 1 und Figur 2 im Längsschnitt in der Ebene III-III der Figur 2, wobei der durch I-I abgegrenzte Teil winkelversetzt dargestellt ist.An embodiment of the invention is shown in the drawing and will be described in more detail below. 1 shows a folding box transfer device in front view in a first working position, FIG. 2 shows the device according to FIG. 1 in a second working position and FIG. 3 shows the device according to FIG. 1 and FIG. 2 in longitudinal section in the plane III-III of FIG the part delimited by II is shown angularly offset.

Beschreibung des AusführungsbeispielsDescription of the embodiment

Die Faltschachtel-Überführvorrichtung ist zwischen einem Magazin 10 mit einer Abgabestation A für flachliegende Faltschachteln 1 und einer mit Mitnehmern 16, 17 ausgerüsteten Fördervorrichtung 15 mit einer Übernahmestation B einer Kartoniermaschine angeordnet. Das Magazin 10, das seitliche Begrenzungen 11 mit Rückhaltenasen 12 am unteren Ende aufweist, ist mit seiner Achse senkrecht zur waagrechten Förderstrecke der Fördervorrichtung 15 ausgerichtet, so daß die zu überführenden flachliegenden Faltschachteln 1 im Magazin 10 waagrecht übereinanderliegen, wobei sich die unterste in der Abgabestation A befindet.The folding box transfer device is arranged between a magazine 10 with a delivery station A for flat-lying folding boxes 1 and a conveyor device 15 equipped with drivers 16, 17 with a transfer station B of a cartoning machine. The magazine 10, which has lateral boundaries 11 with retaining lugs 12 at the lower end, is perpendicular to the horizontal with its axis The conveying path of the conveying device 15 is aligned so that the flat-lying folding boxes 1 to be transferred lie horizontally one above the other in the magazine 10, the lowest one being located in the delivery station A.

Zum Entnehmen und Halten von Faltschachteln 1 hat die Vorrichtung an einem Rotor 20 drei Saugköpfe 22, die auf dem Umfang des Rotors 20 um 120 Grad versetzt radial nach außen weisend abstehen. Jeder Saugkopf 22 umfaßt zwei Paar Sauger 23, 24, von denen jeweils ein Paar axial deckungsgleich an den Enden von zwei Haltesternen 25 angeordnet sind, die ebenfalls deckungsgleich auf einer zentralen Welle 26 des Rotors 20 befestigt sind. Vorzugsweise sind die Haltesterne 25 auf der Welle 26 axial verstellbar, so daß der Abstand der Saugerpaare der Länge der zu behandelnden Faltschachteln angepaßt werden kann. Die Haltesterne 25 sind durch eine Paßfeder 27 in der Welle 26 gegen Verdrehen gesichert und mit Schrauben 28 festgeklemmt.To remove and hold folding boxes 1, the device has three suction heads 22 on a rotor 20, which protrude radially outward on the circumference of the rotor 20 by 120 degrees. Each suction head 22 comprises two pairs of suction cups 23, 24, each of which a pair are axially congruently arranged at the ends of two holding stars 25, which are also fastened congruently on a central shaft 26 of the rotor 20. The holding stars 25 on the shaft 26 are preferably axially adjustable so that the distance between the pairs of suction cups can be adapted to the length of the folding boxes to be treated. The retaining stars 25 are secured by a key 27 in the shaft 26 against rotation and clamped with screws 28.

Die Saugköpfe 22 werden zum Überführen von Faltschachteln 1 von der Abgabestation A des Magazins 10 zur Aufnahmestation B der Fördervorrichtung 15 auf einer Zykloidenbahn C geführt, wobei ein Punkt etwa in der Mitte zwischen den beiden Saugern 23, 24 eines Paares eine Bahn mit vier Umkehrpunkten F, G, H, I mit dazwischenliegenden konkaven Kurvenbögen durchläuft. Zum Erzeugen dieser Zykloidenbahn C ist die Welle 26 des wie ein Planetenteil angeordneten Rotors 20 gleichachsig mit dem exzentrischen Kurbelzapfen 31 einer als Planetenträger ausgebildeten Kurbel 30 verbunden. Dieser Kurbelzapfen 31, der mit einer Exzentrizität E zur Achse der Antriebswelle 32 der Kurbel 30 drehbar in der Kurbel gelagert ist, trägt ein Planeten-Zahnrad 33, das mit einem ebenfalls in der Kurbel 30 drehbar gelagerten Zwischenrad 34 kämmt. Dieses Zwischenrad 34 steht außerdem in Eingriff mit einem Sonnen-Zahnrad 35, das fest mit dem Lagerauge 36 des Gestells 37 verbunden ist, in dem die Antriebswelle 32 der Kurbel 30 gelagert ist. Das Übersetzungsverhältnis zwischen dem Sonnenrad 35 und dem Planetenrad 33 beträgt 4:3. Der radiale Abstand D der Saugfläche der einzelnen Saugköpfe 22 zur Achse des Rotors 20, die koaxial zur Achse des Kurbelzapfens 31 der Kurbel 30 ist, liegt im Bereich des Dreifachen der Exzentrizität E des Kurbelzapfens 31 zur Drehachse der Kurbel 30. Der Abstand der Abgabestation A des Magazins 10 von der Aufnahmestation B an der Fördervorrichtung 15 beträgt das Zweifache der Summe aus der Exzentrizität E der Kurbel 30 und dem Abstand D der Saugköpfe 22 zur Achse des Rotors 20, beziehungsweise zur Achse des Kurbelzapfens 31.The suction heads 22 are guided for transferring folding boxes 1 from the delivery station A of the magazine 10 to the receiving station B of the conveying device 15 on a cycloid track C, with a point approximately in the middle between the two suckers 23, 24 of a pair of tracks with four reversal points F , G, H, I with concave curves in between. To generate this cycloidal path C, the shaft 26 of the rotor 20, which is arranged like a planetary part, is connected coaxially to the eccentric crank pin 31 of a crank 30 designed as a planet carrier. This crank pin 31, which is rotatably mounted in the crank with an eccentricity E to the axis of the drive shaft 32 of the crank 30, carries a planetary gear 33 which meshes with an intermediate wheel 34 which is also rotatably mounted in the crank 30. This intermediate wheel 34 is also in engagement with a sun gear 35, which is fixedly connected to the bearing eye 36 of the frame 37, in which the drive shaft 32 of the crank 30 is mounted. The gear ratio between the sun gear 35 and the planet gear 33 is 4: 3. The radial distance D of the suction surface of the individual suction heads 22 to the axis of the rotor 20, which is coaxial to the axis of the crank pin 31 of the crank 30, is in the range of three times the eccentricity E of the crank pin 31 to the axis of rotation of the crank 30. The distance between the delivery station A of the magazine 10 from the receiving station B on the conveyor device 15 is twice the sum of the eccentricity E of the crank 30 and the distance D of the suction heads 22 from the axis of the rotor 20 or from the axis of the crank pin 31.

Bei der beschriebenen Ausgestaltung des Planeten-Getriebes und der gewählten Abmessungen bewegen sich die Mitten der Saugköpfe 22 auf der in Figur 1 und 2 strichpunktiert dargestellten und oben beschriebenen Zykloidenbahn C. Um den Saugköpfen 22 eine Bewegung zu erteilen, die beim Einlauf in die Aufnahmestation B eine mit der Förderrichtung (Pfeil L) der Fördervorrichtung 15 gleichgerichtete Bewegungskomponente aufweist, wird die Kurbel 30 entgegen (Pfeil K) der Bewegungsrichtung der Saugköpfe 22 (Pfeile M) angetrieben. Dabei wird die Kurbel 30 pro Übergabe einer Faltschachtel (Arbeitstakt) um einen Drehwinkel von 360 Grad gedreht. Zum Überführen einer Faltschachtel 1 von der Abgabestation A zur Aufnahmestation B wird die Kurbel 30 um 540 Grad gedreht. Durch die beschriebene Gestaltung der Vorrichtung steht zum Öffnen einer Faltschachtel verhältnismäßig viel Zeit auf einem relativ kurzen Weg zur Verfügung, wobei hinzukommt, das durch den Umkehrpunkt G auf dem Überführweg der Faltschachteln 1 eine Station zum Behandeln der Faltschachteln zur Verfügung steht, wie weiter unten noch beschrieben wird.In the described configuration of the planetary gear and the selected dimensions, the centers of the suction heads 22 move on the cycloid path C shown in FIGS. 1 and 2 and described above in order to give the suction heads 22 a movement which occurs when entering the receiving station B has a movement component aligned with the conveying direction (arrow L) of the conveying device 15, the crank 30 is driven counter (arrow K) to the direction of movement of the suction heads 22 (arrows M). The crank 30 is rotated through a rotation angle of 360 degrees per transfer of a folding box (work cycle). To transfer a folding box 1 from the delivery station A to the receiving station B, the crank 30 is rotated 540 degrees. Due to the described design of the device, a relatively long time is available for opening a folding box in a relatively short way, in addition to which a station for handling the folding boxes is available as a result of the reversal point G on the transfer path of the folding boxes 1, as further below is described.

Mit den oben angegebenen Abmessungen und Verhältnissen wird für den Punkt in der Mitte zwischen zwei Saugern 23, 24 eines Saugkopfes 22 eine viereckige Zykloidenbahn C erzeugt, bei der die Umkehrpunkte F, G, H, I deutlich als Endpunkte ausgebildet sind. In manchen Fällen ist es aber zum Entnehmen von Faltschachteln 1 aus dem Magazin 10 vorteilhaft, in die Bereiche der Zykloidenbahn um die Umkehrpunkte als kleine Schleifen zu gestalten, so daß der spitz auslaufenden Bewegung der Saugköpfe 22 eine Querkomponente überlagert wird. Dadurch wird erreicht, daß die zu erfassende, unterste Faltschachtel 1 im Magazin 10 eine Querbewegung erhält, die das Herausziehen der erfäßten Faltschachtel 1 aus den Rückhaltenasen 12 erleichtert. Zum Ausbilden solcher Schleifen in der Zykloidenbahn C der Saugköpfe 22 wird der Abstand D der Saugerfläche zu der Achse des Rotors 20 kleiner als das Dreifache der Exzentrizität E der Kurbel 30 gewählt, vorzugsweise das 2,75-fache. Entsprechend ist der Abstand der Abgabestation A zu der Aufnahmestation B anzupassen.With the dimensions and ratios given above, a suction head 22 is used for the point in the middle between two suction cups 23, 24 a square cycloid path C is generated, in which the reversal points F, G, H, I are clearly designed as end points. In some cases, however, to remove folding boxes 1 from the magazine 10, it is advantageous to design small loops in the areas of the cycloidal path around the reversal points, so that a transverse component is superimposed on the tapering movement of the suction heads 22. It is thereby achieved that the lowest folding box 1 to be detected receives a transverse movement in the magazine 10, which facilitates the pulling out of the detected folding box 1 from the retaining lugs 12. To form such loops in the cycloid path C of the suction heads 22, the distance D of the suction surface to the axis of the rotor 20 is chosen to be less than three times the eccentricity E of the crank 30, preferably 2.75 times. The distance between the delivery station A and the receiving station B must be adjusted accordingly.

Schleifen und auch Abflachungen im Bereich der Umkehrpunkte der Zykloidenbahn C der Saugköpfe 22 können auch durch Verdrehen des Sonnen-Zahnrades 35 des Planetengetriebes erzeugt werden. Dazu wird das oben als ortsfest beschriebene Sonnenrad 35 in eine mit dem Arbeitstakt der Vorrichtung abgestimmte Drehschwingung um einen bestimmten Winkel versetzt, so daß im Umkehrpunkt F an der Abgabestation A eine Schleife und im gegenüberliegenden Umkehrpunkt H an der Aufnahmestation B eine Abflachung im Bereich dieser Umkehrpunkte zustandekommt. Wie oben beschrieben, ist die Schleife beim Entnehmen einer Faltschachtel aus dem Magazin vorteilhaft. Die Abflachung an der Aufnahmestation B macht ein Übergeben der überführten Faltschachteln in die mit gleichförmiger Geschwindigkeit bewegte Fördereinrichtung 15 durch Geschwindigkeitsanpassung vorteilhaft.Grinding and flattening in the area of the reversal points of the cycloid path C of the suction heads 22 can also be produced by turning the sun gear 35 of the planetary gear. For this purpose, the sun gear 35 described above as being stationary is set in a torsional vibration coordinated with the working cycle of the device by a certain angle, so that in the reversal point F at the delivery station A a loop and in the opposite reversal point H at the receiving station B a flattening in the area of these reversal points comes about. As described above, the loop is advantageous when removing a folding box from the magazine. The flattening at the receiving station B makes it advantageous to transfer the transferred folding boxes into the conveyor device 15 moving at a uniform speed by adjusting the speed.

Zum Aufrichten der aus dem Magazin 10 entnommenen Faltschachteln 1, die von den Saugköpfen 22 an einer Wand 2 einer Faltschachtel 1 durch Unterdruck gehalten werden, ist jedem Saugerpaar 23, 24 der Saugköpfe 22 ein Aufdrückfinger 40 schwenkbar zugeordnet. Die ebenfalls paarweise angeordneten Aufdrückfinger 40 werden beim Überführen einer Faltschachtel 1 gegen die über eine Faltlinie mit der von den Saugern 23, 24 festgehaltenen Wand 2 verbundene angrenzende Wand 3 geschwenkt, so daß ein an ihrem freien, abgewinkelten Ende angeordnete Rolle 41 an der Wand 3 anliegend die Faltschachtel 1 aufrichtet (Fig. 1 und Fig. 2). Die Aufdrückfinger 40 sind in den Haltesternen 25 mit Augen 42 drehbar gelagert, die paarweise von je einer zur Welle 26 achsparallelen Vierkantwelle 43 durchsetzt werden. Die außerdem in einer mit der Welle 26 durch Festklemmen mit einer Schraube 47 gegen die Paßfeder 27 fest verbundenen Scheibe 44 drehbar gelagerten Vierkantwellen 43 tragen zum Schwenken der Aufdrückfinger 40 an ihrem der Kurbel 30 nahen Ende einen Hebel 45 mit einer Rolle 46, die in einer Kurvennut 51 einer Steuerscheibe 50 geführt ist. Die Steuerscheibe 50 ist drehbar auf der Welle 26 gelagert und fest mit einer Koppel 52 verbunden, die an einer am Gestell gelagerten Schwinge 53 angelenkt ist, so daß die Steuerscheibe 50 beim Drehen der Kurbel 30 auf der Kreisbahn K des Kurbelzapfens 31 umläuft, sich jedoch nicht mit dem Rotor 20 dreht, sondern relativ zu diesem stillsteht. Dadurch werden durch die Form der Kurvennut 51 der Steuerscheibe 50 die Hebel 45 so verschwenkt, daß die Andrückfinger 40 auf der Bahnstrecke von der Abgabestation A zur Aufnahmestation B gegen die von den zugeordneten Saugköpfen 22 jeweils gehaltene Faltschachtel 1 schwenken, und auf Bahnstrecke von der Aufnahmestation B und der Abgabestation A wieder zurückschwenken. Die Faltschachteln 1 können nicht nur zu einem Rechteck aufgerichtet, sondern überdies zu einem Parallelogramm verformt werden, so daß die Faltlinien zwischen den einzelnen Wänden gebrochen und dabei Spannungen abgebaut werden.For erecting the folding boxes 1 removed from the magazine 10 by the suction heads 22 on a wall 2 of a folding box 1 are held by negative pressure, each pair of suction cups 23, 24 of the suction heads 22 is assigned a press-on finger 40 so that it can pivot. The press-on fingers 40, which are also arranged in pairs, are pivoted when a folding box 1 is transferred against the adjacent wall 3 connected to the wall 2 held by the suction cups 23, 24 via a folding line, so that a roller 41 arranged on its free, angled end is attached to the wall 3 the folding box 1 fits upright (Fig. 1 and Fig. 2). The press-on fingers 40 are rotatably mounted in the holding stars 25 with eyes 42, which are penetrated in pairs by a square shaft 43 which is axially parallel to the shaft 26. The square shafts 43, which are also rotatably mounted in a disk 44 which is firmly connected to the shaft 27 by clamping with a screw 47 against the key 27, carry a lever 45 with a roller 46 on a swivel of the pressing fingers 40 at its end close to the crank 30 Curve groove 51 of a control disc 50 is guided. The control disk 50 is rotatably mounted on the shaft 26 and is fixedly connected to a coupling 52 which is articulated on a rocker 53 mounted on the frame, so that the control disk 50 rotates on the circular path K of the crank pin 31 when the crank 30 is rotated, however does not rotate with the rotor 20, but stands still relative to this. Characterized by the shape of the cam groove 51 of the control disc 50, the lever 45 is pivoted so that the pressure fingers 40 on the rail section from the delivery station A to the receiving station B against the folding box 1 held by the associated suction heads 22, and on the rail section from the receiving station B and the delivery station A swivel back. The folding boxes 1 can not only be erected into a rectangle, but can also be deformed into a parallelogram, so that the folding lines between the individual walls are broken and tensions are reduced.

Zum Steuern des Vakuums für die Sauger 23, 24 der Saugköpfe 22, so daß im Umkehrpunkt F an der Abgabestation A Unterdruck erzeugt und im gegenüberliegenden Umkehrpunkt H an der Aufnahmestation B wieder belüftet wird, sind in der Steuerscheibe 50 zur Scheibe 44 hin offene, bogenförmige Steuernuten 55, 56 radial innerhalb der Kurvennut 51 angeordnet. Die eine Steuernut 55 ist über Bohrungen 57, 58 mit einer zu einer Vakuumquelle führenden Leitung 59 und die andere 56 über eine Bohrung 60 mit der Umgebungsluft verbunden. In Deckung mit den Steuernuten 55, 56 sind an der Scheibe 44 drei Bohrungen um 120 Grad versetzt angeordnet, von denen aus Leitungen 61, 62 zu den Saugern 23, 24 der zugeordneten Saugköpfe führen.To control the vacuum for the suction cups 23, 24 of the suction heads 22, so that negative pressure is generated at the reversal point F at the dispensing station A and ventilated again at the opposite reversing point H at the receiving station B, the control disc 50 is open towards the disc 44 and is arcuate Control grooves 55, 56 are arranged radially within the cam groove 51. One control groove 55 is connected via bores 57, 58 to a line 59 leading to a vacuum source and the other 56 is connected to the ambient air via a bore 60. In coincidence with the control grooves 55, 56, three bores are arranged offset by 120 degrees on the disk 44, from which lines 61, 62 lead to the suction cups 23, 24 of the associated suction heads.

Bei dem Ausführungsbeispiel hat ein Saugkopf 22 je zwei Sauger 23, 24 auf zwei Haltesternen 25. Je nach der Breite der zu überführenden Faltschachteln ist es zweckmäßig, nur einen oder mehr als zwei Sauger an einem Arm eines Drehsterns und je nach der Länge einer Faltschachtel nur einen oder mehr als zwei Drehsterne auf der Welle 26 des Rotors 20 anzuordnen.In the exemplary embodiment, a suction head 22 has two suction cups 23, 24 on two holding stars 25. Depending on the width of the folding boxes to be transferred, it is expedient to only have one or more than two suction cups on one arm of a rotating star and depending on the length of a folding box to arrange one or more than two rotating stars on the shaft 26 of the rotor 20.

Um die Vorrichtung beim Wechsel auf ein anderes Format von Faltschachteln schnell umstellen zu können, ist die Welle 26, die den Rotor 20, die Scheibe 44 und die Steuerscheibe 50 trägt, als Wechselteil ausgebildet. Dazu hat sie an ihrem der Kurbel 30 nahen Ende einen Flansch 65, der mittels einer Schraube 66 in einer gestuften Axialbohrung 67 der Welle 26 gegen einen angepaßten Flansch 68 an dem Kurbelzapfen 31 geklemmt wird. Ein vorstehender Indexstift 70 am Flansch 68 und eine entsprechende Paßbohrung 71 am Flansch 65 sichern eine winkelgenaue Stellung des Rotors 20 auf dem Kurbelzapfen 30.In order to be able to quickly change the device when changing to a different format of folding boxes, the shaft 26, which carries the rotor 20, the disk 44 and the control disk 50, is designed as an exchangeable part. For this purpose, it has at its end near the crank 30 a flange 65 which is clamped by means of a screw 66 in a stepped axial bore 67 of the shaft 26 against an adapted flange 68 on the crank pin 31. A protruding index pin 70 on the flange 68 and a corresponding fitting bore 71 on the flange 65 ensure that the rotor 20 is positioned on the crank pin 30 with precise angles.

Zum sicheren Aufrichten von Faltschachteln, die wegen der Steifigkeit des Packstoffes oder aufgrund ihres Seitenverhältnisses schwierig zu Öffnen sind, kann dem Rotor 20 zusätzlich ein Gegensauger 75 zugeordnet werden. Der an einem Hebel 76 befestigte Gegensauger 75 ist im Bereich des zwischen der Abgabestation A und der Aufnahmestation B gelegenen Umkehrpunktes G angeordnet. Sein Hebel 76 wird gesteuert so bewegt, daß er beim Einlaufen einer Faltschachtel 1 in den Umkehrpunkt G die Wand 4 erfaßt, die der von den Saugern 23, 24 eines Saugkopfes 22 erfaßten Wand 2 gegenüberliegt, und durch eine Bewegung diese Wand 4 von der erfaßten 2 wegzieht. Der Gegensauger 75 unterstützt die Aufdrückfinger 40 und sichert deren Wirkung.For the safe erection of folding boxes that are difficult to open due to the rigidity of the packaging material or due to their aspect ratio, a counter suction device 75 can also be assigned to the rotor 20. The counter suction device 75 attached to a lever 76 is arranged in the region of the reversal point G between the delivery station A and the receiving station B. Its lever 76 is moved in a controlled manner so that when a folding box 1 enters the reversal point G it detects the wall 4 which is opposite the wall 2 detected by the suction cups 23, 24 of a suction head 22, and by movement this wall 4 detects it 2 moves away. The counter suction 75 supports the press-on fingers 40 and ensures their effectiveness.

Hingewiesen wird außerdem auf die Möglichkeit, an der Überführungsbahn der Faltschachteln, insbesondere an der Strecke vom Umkehrpunkt G zur Aufnahmestation B Faltelemente, Führungsschienen und Weichen anzuordnen, welche die von den Öffnungen der Faltschachteln abstehenden Faltlaschen in für die Weiterbehandlung der Faltschachteln günstige Positionen bringen.Attention is also drawn to the possibility of arranging folding elements, guide rails and switches on the transfer path of the folding boxes, in particular on the route from the reversal point G to the receiving station B, which bring the folding tabs protruding from the openings of the folding boxes into positions which are favorable for the further treatment of the folding boxes.

Claims (8)

  1. Apparatus for removing flat objects, especially flat-lying folding boxes (1), from a delivery station (A) and transferring them to a receiving station (B) having a plurality of suction heads (22) rotating on a closed cycloid path (C) which has a plurality of acute cusps and curved arcs lying in between, the delivery station and the receiving station being arranged at cusps of the cycloid path, having a rotor (20), which bears the suction heads (22) and from which the suction heads protrude outwards, evenly distributed on a circle, having a crank (30), which bears the rotor rotatably on an eccentric spindle (31) and is uniformly turned oppositely to the conveying direction of the suction heads, and having a planetary gear mechanism, which has a sun wheel (35), arranged coaxially with respect to the axis of rotation of the crank and fixed in place during operation, a planet wheel (33), firmly connected to the rotor and rotatable on the eccentric spindle of the crank, and also an intermediate wheel (34), meshing with these two wheels, characterized in that the cycloid path (C) has four cusps (F, G, H, I) and the delivery station (A) and the receiving station (B) are arranged at opposite cusps (F, H), in that three suction heads are arranged offset by 120° on the rotor (20), in that the transmission ratio between the sun wheel (35) and the planet wheel (33) is 4:3, and in that the radial distance (D) of the suction surface of the suction heads from the axis of the rotor (20) lies in the range of three times the eccentricity (E) of the crank (30).
  2. Apparatus according to Claim 1, characterized in that the distance of the suction heads (22) from the axis of rotation of the rotor (20) is somewhat less than three times, preferably 2.75 times, the eccentricity (E) of the crank (30), so that the cycloid path (C) of the suction heads forms a loop in the region of the cusps (F, G, H, I).
  3. Apparatus according to Claim 1, characterized in that the sun wheel (35) is turned cyclically forward and back by a certain angle, so that at least the region around the cusp (H) of the cycloid path (C) in the region of the delivery station (B) is flattened off.
  4. Apparatus according to one of Claims 1 to 3, characterized in that each suction head (22) is assigned a pressing finger (40), which is mounted in the rotor (20) rotatably in relation to the said suction head and can be swivelled against a wall (3) of a folding box (1) which is joined by means of a folding line to the wall (2) firmly held by the suction head.
  5. Apparatus according to Claim 4, characterized in that the pressing fingers (40) are swivelled cyclically by a control cam (50, 51) by means of control levers (45) which are mounted rotatably on the eccentric crank spindle (26, 31) of the crank (30) coaxially with respect to the rotor (20) but are hindered from turning together with the rotor (20).
  6. Apparatus according to Claim 5, characterized in that the control cam (50, 51) is fastened on a coupler (52) which is articulated on a rocker (53).
  7. Apparatus according to one of Claims 4 to 6, characterized in that the rotor (20) is flange-mounted together with the control cam (50, 51) as an exchangeable part on the crank (30, 31).
  8. Apparatus according to one of Claims 1 to 7, characterized in that each suction head (22) has at least two suckers (23, 24) arranged in a common plane one behind the other in the conveying direction.
EP90121930A 1989-12-19 1990-11-16 Apparatus for transferring flat objects, especially folding boxes Expired - Lifetime EP0434961B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3941867 1989-12-19
DE3941867A DE3941867A1 (en) 1989-12-19 1989-12-19 DEVICE FOR CONVEYING FLAT OBJECTS, IN PARTICULAR FOLDING BOXES

Publications (2)

Publication Number Publication Date
EP0434961A1 EP0434961A1 (en) 1991-07-03
EP0434961B1 true EP0434961B1 (en) 1994-06-22

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EP90121930A Expired - Lifetime EP0434961B1 (en) 1989-12-19 1990-11-16 Apparatus for transferring flat objects, especially folding boxes

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US (1) US5061231A (en)
EP (1) EP0434961B1 (en)
JP (1) JP3095770B2 (en)
DE (2) DE3941867A1 (en)
ES (1) ES2056344T3 (en)

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JP3095770B2 (en) 2000-10-10
EP0434961A1 (en) 1991-07-03
DE3941867A1 (en) 1991-06-20
ES2056344T3 (en) 1994-10-01
DE59006224D1 (en) 1994-07-28
JPH03200516A (en) 1991-09-02
US5061231A (en) 1991-10-29

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