EP0752383B1 - Device for separating flat stacked objects - Google Patents

Device for separating flat stacked objects Download PDF

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Publication number
EP0752383B1
EP0752383B1 EP96108751A EP96108751A EP0752383B1 EP 0752383 B1 EP0752383 B1 EP 0752383B1 EP 96108751 A EP96108751 A EP 96108751A EP 96108751 A EP96108751 A EP 96108751A EP 0752383 B1 EP0752383 B1 EP 0752383B1
Authority
EP
European Patent Office
Prior art keywords
workpiece
stack
roll
conveyor
conveyor belt
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
EP96108751A
Other languages
German (de)
French (fr)
Other versions
EP0752383A2 (en
EP0752383A3 (en
Inventor
Uwe Köhn
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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
Priority claimed from DE19539935A external-priority patent/DE19539935C2/en
Application filed by Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP0752383A2 publication Critical patent/EP0752383A2/en
Publication of EP0752383A3 publication Critical patent/EP0752383A3/en
Application granted granted Critical
Publication of EP0752383B1 publication Critical patent/EP0752383B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B65H3/00—Separating articles from piles
    • B65H3/08—Separating articles from piles using pneumatic force
    • B65H3/12—Suction bands, belts, or tables moving relatively to 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
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/10—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position
    • B65H9/103—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop
    • B65H9/105—Pusher and like movable registers; Pusher or gripper devices which move articles into registered position acting by friction or suction on the article for pushing or pulling it into registered position, e.g. against a stop using suction means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H3/00—Separating articles from piles
    • B65H3/32—Separating articles from piles by elements, e.g. fingers, plates, rollers, inserted or traversed between articles to be separated and remainder 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
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4232—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles
    • B65H2301/42322—Depiling; Separating articles from a pile of horizontal or inclined articles, i.e. wherein articles support fully or in part the mass of other articles in the piles from bottom 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
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/40—Type of handling process
    • B65H2301/42—Piling, depiling, handling piles
    • B65H2301/423—Depiling; Separating articles from a pile
    • B65H2301/4233—Depiling; Separating articles from a pile by peeling, i.e. involving elongated elements traversing 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
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/30—Chains
    • B65H2404/31—Chains with auxiliary handling means
    • B65H2404/313—Bars, rods, e.g. bridging two chains running synchronously
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2404/00—Parts for transporting or guiding the handled material
    • B65H2404/30—Chains
    • B65H2404/31—Chains with auxiliary handling means
    • B65H2404/313—Bars, rods, e.g. bridging two chains running synchronously
    • B65H2404/3132—Bars, rods, e.g. bridging two chains running synchronously arranged obliquely relatively to transport direction

Definitions

  • the invention relates to a device according to the preamble of claim 1.
  • the present invention is therefore based on the object of supplying isolated workpieces in the correct position and handed over in time to a downstream processing device.
  • a further conveyor is connected to a suction conveyor belt Conveyor belt connects, which rotates at a higher speed and that with the feed-side deflection roller of the conveyor belt on one on this lowerable pressure roller cooperates, which is controlled such that the workpieces are deducted from the first conveyor belt at times that are in the correct position and on the machine cycle of the subsequent processing device coordinated timely entry into the downstream processing station guaranteed and that a control device is provided for controlling the pressure roller is that from the signals of a leading edge of the trailing workpiece sensing sensor and one the correct position of this workpiece on the conveying conveyor signaling the lowering times of the pressure roller certainly.
  • the signal transmitter is advantageously a sensor that detects the angular position of the task side Deflection pulley of the conveyor belt conveyed and detected accordingly with this rotating marks with the same circumferential distribution signals generated.
  • the separating device 1 consists of a machine frame with the side parts 2, 3, on the inside of them via holding pieces 4, 5 guideways 6, 7 consisting of profiles for on these rotating rollers 8 are attached.
  • the two in parallel mutually arranged guideways 6, 7 each consist of upper and lower sections running parallel to each other, which are connected by approximately semicircular sections are.
  • the guided on the guideways 6, 7 and in the same Spaces 8 arranged parallel to each other are on their ends attached to endless chains or traction elements, which in guides not shown run and from not shown Drives are driven.
  • the rollers 8 consist of cylindrical Pipe pieces that are freely rotatable on axes, whose axle journals 10 to which they pass via the guideways 6, 7 moving chains or traction elements are attached.
  • the on the guideways 6, 7 on endless chains or traction devices revolving rollers form with their upper run 11 a wandering Roller grate, above which is a stacking magazine Cassette 12 is held on the side parts 2, 3, the serves to accommodate stacked pieces of paper tube 13, which after their separation in downstream processing stations Paper bags are processed.
  • the cassette 12 has four Side walls, of which at least one side wall 14 in the direction the double arrow through a manually operated spindle drive can be adjusted to different tube piece formats.
  • the bottom of the stacking cassette 12 is through the upper strand 11 of the migrating roller grate.
  • the wandering roller grate is between this and the lower strand of the moving roller grate Conveyor belt 16 arranged, the parallel running side by side Suction belt conveyors 17, 18.
  • the conveyor belt 16 runs perpendicular to the running direction of the moving roller grate.
  • the front deflecting rollers 20 of the two parallel side by side Suction belt conveyors 17, 18 to be run are mounted on brackets 21, which are attached to the side frame 2.
  • the endless ones Conveyor belts 17, 18 pass through a rectangular window-like Section 22 of the side frame 3 through and overflow the driven ends forming driven pulleys 23, 24, are stored in the machine frame in a manner not shown.
  • the driven deflection rollers 23, 24 are controlled by Geared motors M1 and M2 with different speeds driven, as can be seen schematically from FIG. 2.
  • the moving roller grate moves in the direction of arrow A. under the stacking cassette 12.
  • Plate-shaped opposite Side walls of the stacking cassette carrying plates 30, 31 are on their underside with friction-increasing pads 32 to which the lateral end areas of the freely rotatable, consisting of pipe pieces roll shells of the rolls 8 at their Pass under the cassette so that they are pressed in a rotating movement with which they are in the From Fig. 3 evident manner in each case on the lowest in the Support cassette 12 stacked piece of hose.
  • the type of peeling of the bottom workpiece from the Stacking cassette and the drive of the liftable and lowerable vacuum corresponds to the representation and description in DE-27 32 591 C2, to which reference is made for a more detailed description.
  • two paired suction cups 35 are provided, each on opposite end regions of the trailing edges of the attack individual workpieces at the same time.
  • the suction cups 35 are also in the manner described in DE-27 32 591 C2 connected to suction air sources that the suction 35 in time supply with suction air.
  • a computer 40 is provided to control the geared motors M1, M2, the position of the sensors on the suction belt conveyor via sensors 43 17, 18 dropped hose pieces detected and accordingly the geared motors in the event of a possible misalignment M1, M2 controls such that a delay due to the different Velocity of the suction belt conveyor is balanced.
  • the speed of the suction belt conveyor can also be done by hand after visual assessment.
  • the separating device is a so-called floor layer Sack manufacturing machine upstream in which to the with the Sides of the hose sections provided with cut edges the floors, for example, cross bottoms.
  • To the isolated and transversely conveyed hose sections to bags without interference it is necessary that the hose pieces from the suction belt conveyors 17, 18 in register, that is, in a way to the conveyor belt 41, which is the infeed conveyor forms in the floor layer, that the Workpieces are taken over from this in the correct position at times, on the machine cycle of the subsequent processing stations are coordinated so that a more accurate and correct position Entry of the workpieces into downstream processing stations is guaranteed.
  • the front deflection roller 42 of the conveying conveyor 41 is driven by the geared motor M1 at a higher speed, so that the conveyor belt 41 with higher Speed revolves as the two suction belt conveyors 17, 18.
  • the suction belt conveyors are taken over in the correct and timely manner 17, 18 guided workpieces to ensure passed the suction belts 17, 18 the workpieces in such a way that these on or over the drive roller 42 of the conveyor 41 to a Accumulate time during which the workpiece is still off the suction boxes 25, 26 is held.
  • the location of the front edge of the subsequently conveyed workpiece 13 is determined by a sensor 43.
  • a sensor 44 incrementmental encoder
  • the sensor 44 forms signals that the exact passage of a point 46 through the downstream one Report processing device. From the signals from the sensors 43, 44, the computer 47 forms a signal for a drive 48 a lifting and lowering pressure roller 49, which is timely in Cycle of the downstream processing machine on the drive roller 42 is lowered and thus a frictional connection of the workpiece 13 causes with the conveyor 41, so that each workpiece 13 in the correct position and in time from the conveyor 41 is taken over.
  • the pieces of hose can also be used Cross bottoms or also with folded bottoms are provided, which are molded onto so-called relay tube pieces.
  • a staggered hose piece 50 is shown enlarged, whose walls are formed in three layers, also the individual layers of each side wall are staggered are.
  • the suction cup 35 engages the layers the lower hose wall overlapping layers of the upper Wall so that the sucked-in end of the tube piece is complete is pulled out of the stack magazine without an upper wall sticks to it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Making Paper Articles (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

The separator has cylindrical tubular rollers (8) running on guidance tracks (6,7) fixed (4,5) to the sides (e.g. 3) of a machine frame. The ends of the rollers are fixed to endless chains. The magazine (12) fitted to the frame sides above the upper set (11) of rollers contains a stack of paper tubes (13) which are extracted by suction boxes (25,26) underlying perforated belt conveyors (17,18) running parallel to each other and driven by motors at different speeds.

Description

Die Erfindung betrifft eine Vorrichtung nach dem Oberbegriff des Anspruchs 1.The invention relates to a device according to the preamble of claim 1.

Bei einer aus der DE 2 732 591 A bekannten Vorrichtung, die die Merkmale des Oberbegriffs von Anspruch 1 aufweist, lassen sich mit hoher Geschwindigkeit gestapelte flache Werkstücke vereinzeln. Bei dieser bekannten Vorrichtung ist es jedoch problematisch, die vereinzelten rechteckigen Gegenstände derart auf den abfördernden Förderer abzulegen, daß dessen Seitenkanten parallel zur Förderrichtung ausgerichtet sind. Denn die von dem oder den Saugern abgezogene Seitenkante oder ein Teil dieser Seitenkante trifft zu einem Zeitpunkt auf den abfördernden Förderer, zu dem ein Teil des Werkstücks noch in Anlage an die Unterseite des Stapels gehalten ist, so daß es bei dem Ablegen des abgeschälten Werkstücks auf den weiterfördernden Förderer zu dessen Verziehen derart kommen kann, daß sich keine kantengerade Ablage ergibt. Es muß bezweifelt werden, daß sich eine kantengerade Ablage auf dem weiterfördernden Förderer erzielen läßt, wenn dieser in der aus DE-27 32 591 C2 gezeigten Weise spitzwinkelig zu dem wandernden Walzenrost verläuft. Der vorliegenden Erfindung liegt daher die Aufgabe zugrunde, vereinzelte zugeführte Werkstücke lagerichtig und zeitgenau einer nachgeschalteten Verarbeitungseinrichtung zu übergeben.In a device known from DE 2 732 591 A, which has the features of the preamble of claim 1, can be at high speed stacked flat workpieces seperate. In this known Device, however, is problematic, the isolated rectangular To place objects on the conveying conveyor in such a way that its side edges are aligned parallel to the conveying direction are. Because the side edge peeled off by the vacuum cleaner (s) or part of this side edge hits at a time on the conveying conveyor, to which part of the workpiece still held against the bottom of the stack is so that when the peeled workpiece is deposited the conveying sponsor come to its warpage in this way can, that there is no straight storage. It must be doubted be that a straight-line shelf on the conveying Can achieve conveyor if this in the DE-27 32nd 591 C2 shown at an acute angle to the moving roller grate runs. The present The invention is therefore based on the object of supplying isolated workpieces in the correct position and handed over in time to a downstream processing device.

Diese Aufgabe wird dadurch gelöst, daß an ein Saugförderband ein weiterförderndes Förderband anschließt, welches mit höherer Geschwindigkeit umläuft und daß mit der aufgabeseitigen Umlenkrolle des weiterfördernden Förderbandes eine auf diese absenkbare Andrückwalze zusammenwirkt, die derart gesteuert ist, daß die Werkstücke von dem ersten Förderband zu Zeitpunkten abgezogen werden, die einen lagerichtigen und auf den Maschinentakt der nachfolgenden Bearbeitungsvorrichtung abgestimmten zeitgenauen Einlauf in die nachgeschaltete Bearbeitungsstation gewährleistet und daß zur Steuerung der Andrückwalze eine Steuervorrichtung vorgesehen ist, die aus den Signalen eines die Vorderkante des nachlaufenden Werkstükkes erfassenden Sensor und eines die richtige Position dieses Werkstückes auf dem weiterfördernden Förderer meldenden Signalgebers die Absenkzeitpunkte der Andrückwalze bestimmt.This object is achieved in that a further conveyor is connected to a suction conveyor belt Conveyor belt connects, which rotates at a higher speed and that with the feed-side deflection roller of the conveyor belt on one on this lowerable pressure roller cooperates, which is controlled such that the workpieces are deducted from the first conveyor belt at times that are in the correct position and on the machine cycle of the subsequent processing device coordinated timely entry into the downstream processing station guaranteed and that a control device is provided for controlling the pressure roller is that from the signals of a leading edge of the trailing workpiece sensing sensor and one the correct position of this workpiece on the conveying conveyor signaling the lowering times of the pressure roller certainly.

Mit Vorteil ist dabei der Signalgeber ein Sensor, der die Winkelstellung der aufgabeseitigen Umlenkrolle des weiterfördernden Förderbandes erfaßt und entsprechend mit dieser rotierenden Marken mit gleich Umfangsverteilung Signale erzeugt.The signal transmitter is advantageously a sensor that detects the angular position of the task side Deflection pulley of the conveyor belt conveyed and detected accordingly with this rotating marks with the same circumferential distribution signals generated.

Ausführungsbeispiele der Erfindung werden nachstehend anhand der Zeichnung näher erläutert. In dieser zeigen

Fig. 1
einen Schnitt durch die Vereinzelungsvorrichtung längs der Linie I-I in Fig. 3,
Fig. 2
den rechten Teil des unter dem Obertrum des Walzenrosts verlaufenden Förderbandes mit dem an dieses anschließenden weiterfördernden Förderbandes,
Fig. 3
einen Schnitt durch die Vereinzelungsvorrichtung längs der Linie III-III in Fig. 1 und
Fig. 4
einen Schnitt durch den jeweils die untere vordere Seitenkante des aus dem Stapel zu vereinzelnden Werkstücks ansaugenden Saugers mit Antriebseinrichtung in schematischer Darstellung.
Embodiments of the invention are explained below with reference to the drawing. In this show
Fig. 1
3 shows a section through the separating device along the line II in FIG. 3,
Fig. 2
the right part of the conveyor belt running under the upper run of the roller grate with the conveyor belt connected to it,
Fig. 3
a section through the separating device along the line III-III in Fig. 1 and
Fig. 4
a section through the respective lower front side edge of the suction to be separated from the stack to be vacuumed suction device with drive device in a schematic representation.

Die Vereinzelungsvorrichtung 1 besteht aus einem Maschinengestell mit den Seitenteilen 2, 3, an deren Innenseiten über Haltestücke 4, 5 aus Profilen bestehende Führungsbahnen 6, 7 für auf diesen umlaufende Walzen 8 befestigt sind. Die beiden parallel zueinander angeordneten Führungsbahnen 6, 7 bestehen jeweils aus oberen und unteren parallel zueinander verlaufenden Abschnitten, die durch etwa halbkreisförmige Abschnitte miteinander verbunden sind. Die auf den Führungsbahnen 6, 7 geführten und in gleichen Abständen parallel zueinander angeordneten Walzen 8 sind an ihren Enden an endlosen Ketten oder Zugorganen befestigt, die in nicht dargestellten Führungen laufen und von nicht dargestellten Antrieben angetrieben sind. Die Walzen 8 bestehen aus zylindrischen Rohrstücken, die frei drehbar auf Achsen gelagert sind, deren Achszapfen 10 an den diese über die Führungsbahnen 6, 7 bewegenden Ketten oder Zugorganen befestigt sind.The separating device 1 consists of a machine frame with the side parts 2, 3, on the inside of them via holding pieces 4, 5 guideways 6, 7 consisting of profiles for on these rotating rollers 8 are attached. The two in parallel mutually arranged guideways 6, 7 each consist of upper and lower sections running parallel to each other, which are connected by approximately semicircular sections are. The guided on the guideways 6, 7 and in the same Spaces 8 arranged parallel to each other are on their ends attached to endless chains or traction elements, which in guides not shown run and from not shown Drives are driven. The rollers 8 consist of cylindrical Pipe pieces that are freely rotatable on axes, whose axle journals 10 to which they pass via the guideways 6, 7 moving chains or traction elements are attached.

Die über die Führungsbahnen 6, 7 an endlosen Ketten oder Zugmitteln umlaufenden Walzen bilden mit ihrem Obertrum 11 einen wandernden Walzenrost, oberhalb von dem eine ein Stapelmagazin bildende Kassette 12 an den Seitenteilen 2, 3 gehaltert ist, das der Aufnahme gestapelter Papierschlauchstücke 13 dient, die nach ihrer Vereinzelung in nachgeschalteten Bearbeitungsstationen zu Papiersäcken verarbeitet werden. Die Kassette 12 besitzt vier Seitenwandungen, von denen mindestens eine Seitenwand 14 in Richtung des Doppelpfeils durch einen von Hand betätigbaren Spindeltrieb auf unterschiedliche Schlauchstückformate einstellbar ist.The on the guideways 6, 7 on endless chains or traction devices revolving rollers form with their upper run 11 a wandering Roller grate, above which is a stacking magazine Cassette 12 is held on the side parts 2, 3, the serves to accommodate stacked pieces of paper tube 13, which after their separation in downstream processing stations Paper bags are processed. The cassette 12 has four Side walls, of which at least one side wall 14 in the direction the double arrow through a manually operated spindle drive can be adjusted to different tube piece formats.

Der Boden der Stapelkassette 12 wird durch das Obertrum 11 des wandernden Walzenrosts gebildet.The bottom of the stacking cassette 12 is through the upper strand 11 of the migrating roller grate.

Unterhalb des Obertrums 11 das wandernden Walzenrosts ist zwischen diesem und dem Untertrum des wandernden Walzenrosts ein Förderband 16 angeordnet, das aus parallel nebeneinander verlaufenden Saugbandförderern 17, 18 besteht. Das Förderband 16 verläuft rechtwinkelig zu der Laufrichtung des wandernden Walzenrosts.Below the upper run 11 the wandering roller grate is between this and the lower strand of the moving roller grate Conveyor belt 16 arranged, the parallel running side by side Suction belt conveyors 17, 18. The conveyor belt 16 runs perpendicular to the running direction of the moving roller grate.

Die vorderen Umlenkwalzen 20 der beiden parallel nebeneinander zu verlaufenden Saugbandförderer 17, 18 sind an Konsolen 21 gelagert, die an dem Seitengestell 2 befestigt sind. Die endlosen Förderbänder 17, 18 treten durch einen rechteckigen fensterartigen Ausschnitt 22 des Seitengestells 3 hindurch und laufen über die Abgabeenden bildende angetriebene Umlenkrollen 23, 24, die in nicht dargestellter Weise im Maschinengestell gelagert sind. Die angetriebenen Umlenkrollen 23, 24 werden durch gesteuerte Getriebemotoren M1 und M2 mit unterschiedlicher Geschwindigkeit angetrieben, wie dies schematisch aus Fig. 2 ersichtlich ist.The front deflecting rollers 20 of the two parallel side by side Suction belt conveyors 17, 18 to be run are mounted on brackets 21, which are attached to the side frame 2. The endless ones Conveyor belts 17, 18 pass through a rectangular window-like Section 22 of the side frame 3 through and overflow the driven ends forming driven pulleys 23, 24, are stored in the machine frame in a manner not shown. The driven deflection rollers 23, 24 are controlled by Geared motors M1 and M2 with different speeds driven, as can be seen schematically from FIG. 2.

Die mit entsprechenden Perforationsreihen versehenen endlosen Förderbänder 17, 18 laufen über Saugkästen 25, 26, die in nicht dargestellter Weise an den Seitenteilen 2, 3 befestigt sind und sich mindestens über die Länge der Stapelkassette 12 unterhalb von dieser in der aus den Fig. 1 und 3 ersichtlichen Weise erstrecken.The endless ones with corresponding rows of perforations Conveyor belts 17, 18 run over suction boxes 25, 26 that are not in shown are attached to the side parts 2, 3 and at least over the length of the stacking cassette 12 below extend from this in the manner shown in FIGS. 1 and 3.

Der wandernde Walzenrost bewegt sich in Richtung des Pfeils A unter der Stapelkassette 12 hindurch. Plattenförmige gegenüberliegende Seitenwandungen der Stapelkassette tragende Platten 30, 31 sind an ihrer Unterseite mit die Reibung erhöhenden Beläge 32 versehen, an die die seitlichen Endbereiche der frei drehbaren, aus Rohrstücken bestehenden Walzenmäntel der Walzen 8 bei ihrem Durchlauf unter der Kassette angedrückt werden, so daß sie in eine drehende Bewegung versetzt werden, mit der sie sich in der aus Fig. 3 ersichtlichen Weise jeweils auf dem untersten in der Kassette 12 gestapelten Schlauchstück abstützen.The moving roller grate moves in the direction of arrow A. under the stacking cassette 12. Plate-shaped opposite Side walls of the stacking cassette carrying plates 30, 31 are on their underside with friction-increasing pads 32 to which the lateral end areas of the freely rotatable, consisting of pipe pieces roll shells of the rolls 8 at their Pass under the cassette so that they are pressed in a rotating movement with which they are in the From Fig. 3 evident manner in each case on the lowest in the Support cassette 12 stacked piece of hose.

Jeweils nach Einlauf einer Walze 8 unter die Kassette 12 erfassen zwei seitlich am linken aus Fig. 3 ersichtlichen Endbereich der Kassette angeordnete und heb- und senkbare Sauger 35 die untere vordere Seitenkante 6 des untersten gestapelten Schlauchstücks, das sich in der Darstellung gemäß Fig. 3 links befindet, und ziehen dieses hinter der gerade durchgelaufenen Walze 8 und vor der nachlaufenden Walze 8 nach unten, so daß die nachfolgende Walze 8 in den keilförmigen Spalt zwischen dem herabgezogenen vorderen Ende des Schlauchstücks und dem dadurch freigelegten Endbereich des nächstfolgenden Schlauchstücks einläuft, das sodann durch die im Takt auf- und abbewegten Sauger in entsprechender Weise wieder herabgezogen wird.Each time after a roller 8 has entered the cassette 12 two end region visible on the left of FIG. 3 arranged and liftable and lowerable suction cup 35 the lower front side edge 6 of the lowest stacked tube piece, 3 in the illustration according to FIG. 3, and pull it behind the roller 8 and before the trailing roller 8 down, so that the following Roller 8 in the wedge-shaped gap between the pulled down front end of the tube piece and the exposed End area of the next piece of hose runs in, which then due to the suction cups moving up and down in time Way is pulled down again.

Der Antrieb der beiden im Takt des Durchlaufs der Walzen 8 hebund senkbaren Sauger 35 ist schematisch in Fig. 4 dargestellt.The drive of the two lifted in time with the passage of the rollers 8 lowerable suction cup 35 is shown schematically in FIG. 4.

Die Art des Abschälens des jeweils untersten Werkstücks aus der Stapelkassette und der Antrieb des heb- und senkbaren Saugers entspricht der Darstellung und Beschreibung in DE-27 32 591 C2, auf die zur näheren Darstellung Bezug genommen wird. Im Gegensatz zu der in dieser Veröffentlichung beschriebenen Vorrichtung sind bei der erfindungsgemäßen Vereinzelungsvorrichtung jedoch zwei paarweise vorgesehene Sauger 35 vorgesehen, die jeweils an einander gegenüberliegenden Endbereichen der Hinterkanten der zu vereinzelnden Werkstücke gleichzeitig angreifen. Die Sauger 35 sind weiterhin auch in der in DE-27 32 591 C2 beschriebenen Weise an Saugluftquellen angeschlossen, die die Sauger 35 im Takt mit Saugluft versorgen.The type of peeling of the bottom workpiece from the Stacking cassette and the drive of the liftable and lowerable vacuum corresponds to the representation and description in DE-27 32 591 C2, to which reference is made for a more detailed description. In contrast to the device described in this publication are in the separating device according to the invention two paired suction cups 35 are provided, each on opposite end regions of the trailing edges of the attack individual workpieces at the same time. The suction cups 35 are also in the manner described in DE-27 32 591 C2 connected to suction air sources that the suction 35 in time supply with suction air.

Die aufeinanderfolgend von unten aus dem in der Kassette 12 gehalterten Stapel vereinzelten Schlauchstücke treffen nach ihrem Abziehen in der aus Fig. 3 ersichtlichen Weise zunächst mit ihrer zuerst abgezogenen Seitenkante auf das Saugband 17, während der noch an dem Stapel haftende Teil durch die durchlaufenden Walzen 8 des wandernden Walzenrosts zunehmend weiter von dem Stapel abgeschält wird, bis auch die gegenüberliegende Seite vollständig auf das andere Saugband 18 fällt. Der sich aus dieser Art der Ablage ergebende Verzug der aufeinanderfolgend abgelegten Werkstücke wird durch die unterschiedliche Geschwindigkeit der Saugbandförderer 17, 18 ausgeglichen, von denen der Saugbandförderer 17 mit geringerer Geschwindigkeit angetrieben ist als der Saugbandförderer 18. Die Geschwindigkeit der beiden Saugbandförderer 17, 18 ist über die getrennt steuerbaren Getriebemotoren M1 und M2 einstellbar.The successively from below from that held in the cassette 12 Stack of isolated pieces of hose meet after theirs Subtract in the manner shown in FIG. 3 with their first peeled side edge on the suction belt 17 while the part still adhering to the stack due to the continuous Rolls 8 of the traveling roller grate progressively further from that Pile is peeled off until the opposite side as well completely falls on the other suction belt 18. The result of this Type of filing resulting delay of the successively filed Workpieces are made by the different speed the suction belt conveyor 17, 18 compensated, of which the Suction belt conveyor 17 driven at a lower speed is as the suction belt conveyor 18. The speed of the two Suction belt conveyor 17, 18 is via the separately controllable geared motors M1 and M2 adjustable.

Zur Steuerung der Getriebemotoren M1, M2 ist ein Rechner 40 vorgesehen, der über Sensoren 43 die Lage der auf die Saugbandförderer 17, 18 abgeworfenen Schlauchstücke erfaßt und entsprechend einer eventuell festgestellten Schieflage die Getriebemotoren M1, M2 derart steuert, daß ein Verzug durch die unterschiedlichen Geschwindigkeiten der Saugbandförderer ausgeglichen wird. Selbstverständlich kann die Geschwindigkeit der Saugbandförderer auch nach visueller Beurteilung von Hand vorgenommen werden.A computer 40 is provided to control the geared motors M1, M2, the position of the sensors on the suction belt conveyor via sensors 43 17, 18 dropped hose pieces detected and accordingly the geared motors in the event of a possible misalignment M1, M2 controls such that a delay due to the different Velocity of the suction belt conveyor is balanced. Of course, the speed of the suction belt conveyor can also be done by hand after visual assessment.

Die Vereinzelungsvorrichtung ist einem sog. Bodenleger einer Sackherstellungsmaschine vorgeschaltet, in dem an die mit den Schnittkanten versehenen Seiten der Schlauchstücke die Böden, beispielsweise Kreuzböden, angeformt werden. Um die vereinzelten und querliegend geförderten Schlauchstücke störungsfrei zu Säkken verarbeiten zu können, ist es erforderlich, daß die Schlauchstücke von den Saugbandförderern 17, 18 registergerecht, also in einer Weise an das weiterfördernde Förderband 41, das den Einlaufförderer in den Bodenleger bildet, übergeben werden, daß die Werkstücke von diesem lagerichtig zu Zeitpunkten übernommen werden, die auf den Maschinentakt der nachfolgenden Bearbeitungsstationen abgestimmt sind, so daß ein zeitgenauer und lagerichtiger Einlauf der Werkstücke in nachgeschaltete Verarbeitungsstationen gewährleistet ist.The separating device is a so-called floor layer Sack manufacturing machine upstream in which to the with the Sides of the hose sections provided with cut edges the floors, for example, cross bottoms. To the isolated and transversely conveyed hose sections to bags without interference To be able to process, it is necessary that the hose pieces from the suction belt conveyors 17, 18 in register, that is, in a way to the conveyor belt 41, which is the infeed conveyor forms in the floor layer, that the Workpieces are taken over from this in the correct position at times, on the machine cycle of the subsequent processing stations are coordinated so that a more accurate and correct position Entry of the workpieces into downstream processing stations is guaranteed.

Die vordere Umlenkrolle 42 des weiterfördernden Förderers 41 wird von dem Getriebemotor M1 mit höherer Geschwindigkeit angetrieben, so daß das weiterfördernde Förderband 41 mit höherer Geschwindigkeit umläuft als die beiden Saugbandförderer 17, 18. Um eine lagerichtige und zeitgenaue Übernahme der von den Saugbandförderern 17, 18 geführten Werkstücke zu gewährleisten, übergeben die Saugbänder 17, 18 die Werkstücke in der Weise, daß diese auf oder über die Antriebsrolle 42 des Förderers 41 zu einer Zeit auflaufen, während der das Werkstück noch von den Saugkästen 25, 26 gehalten wird. Die Lage der jeweils vorderen Kante des nachgeförderten Werkstücks 13 wird von einem Sensor 43 ermittelt. Ein Sensor 44 (Inkrementalgeber) tastet Zähne oder sonstige gerasterte Marken ab, die mit der Antriebsrolle 42 des Förderers 41 verbunden sind. Der Sensor 44 bildet Signale, die den zeitgenauen Durchlauf eines Punktes 46 durch die nachgeschaltete Bearbeitungsvorrichtung melden. Aus den Signalen der Sensoren 43, 44 bildet der Rechner 47 ein Signal für einen Antrieb 48 einer heb- und absenkbaren Andruckwalze 49, die zeitrichtig im Takt der nachgeschalteten Bearbeitungsmaschine auf die Antriebsrolle 42 abgesenkt wird und damit einen Kraftschluß des Werkstücks 13 mit dem weiterfördernden Förderer 41 bewirkt, so daß jedes Werkstück 13 lagerichtig und zeitgenau von dem Förderer 41 übernommen wird.The front deflection roller 42 of the conveying conveyor 41 is driven by the geared motor M1 at a higher speed, so that the conveyor belt 41 with higher Speed revolves as the two suction belt conveyors 17, 18. To ensure that the suction belt conveyors are taken over in the correct and timely manner 17, 18 guided workpieces to ensure passed the suction belts 17, 18 the workpieces in such a way that these on or over the drive roller 42 of the conveyor 41 to a Accumulate time during which the workpiece is still off the suction boxes 25, 26 is held. The location of the front edge of the subsequently conveyed workpiece 13 is determined by a sensor 43. A sensor 44 (incremental encoder) probes teeth or others screened marks with the drive roller 42 of the conveyor 41 are connected. The sensor 44 forms signals that the exact passage of a point 46 through the downstream one Report processing device. From the signals from the sensors 43, 44, the computer 47 forms a signal for a drive 48 a lifting and lowering pressure roller 49, which is timely in Cycle of the downstream processing machine on the drive roller 42 is lowered and thus a frictional connection of the workpiece 13 causes with the conveyor 41, so that each workpiece 13 in the correct position and in time from the conveyor 41 is taken over.

In nachgeschalteten Sackmaschinen können die Schlauchstücke mit Kreuzböden oder aber auch mit umgefalteten Böden versehen werden, die an sog. Staffelschlauchstücken angeformt werden.In downstream sacking machines, the pieces of hose can also be used Cross bottoms or also with folded bottoms are provided, which are molded onto so-called relay tube pieces.

In Fig. 4 ist ein Staffelschlauchstück 50 vergrößert dargestellt, dessen Wandungen dreilagig ausgebildet sind, wobei auch die einzelnen Lagen jeder Seitenwand gestaffelt zueinander angeordnet sind.4, a staggered hose piece 50 is shown enlarged, whose walls are formed in three layers, also the individual layers of each side wall are staggered are.

Um ein Abziehen nur der unteren Wand des Schlauchstücks aus dem Stapelmagazin zu vermeiden, greift der Sauger 35 an den die Lagen der unteren Schlauchwandung überlappenden Lagen der oberen Wandung an, so daß das angesaugte Ende des Schlauchstücks vollständig aus dem Stapelmagazin herausgezogen wird, ohne daß noch eine obere Wandunge in diesem haften bleibt.To pull only the bottom wall of the hose piece out of the To avoid stacking magazine, the suction cup 35 engages the layers the lower hose wall overlapping layers of the upper Wall so that the sucked-in end of the tube piece is complete is pulled out of the stack magazine without an upper wall sticks to it.

Claims (2)

  1. Device for separating stacked flat objects, preferably for separating stacked pieces of tube to be processed into sacks, having a stack magazine (12), whose base supporting the stack (13) comprises rolls (8) which pass through, rolling on the respective lowest workpiece and belong to a moving roll frame, the rolls (8) of which are moved in a circulating manner having a conveyor system which is arranged below the upper run (11) of the roll frame, runs at an angle to the latter and onto which the respective lowest workpiece peeled off the stack (13) by a passing roll is thrown, and
    having a sucker (35) or suckers which grips or grip between the rolls (8) at the cycle rate of the passage of the latter, and pulls or pull down one side edge of the respective lowest workpiece between two rolls (8) in such a way that the leading roll (8) still supports the stack (13) above the workpiece and the trailing roll (8) passes through between the workpiece and the workpiece above it and effects secure separation of the respective lowest workpiece from the stack (13), the outgoing conveyor system comprising conveying elements (17, 18) which run parallel to one another and can be driven at different speeds, characterized in that the conveying elements (17, 18) are followed by a conveyor belt (41) which conveys onwards and circulates at higher speed,
    in that the deflection roller (42) on the output side of the onward conveyor belt (41) cooperates with a pressure roll (49) which can be lowered onto it and is controlled in such a way that the workpieces (13) upstream of the first conveyor belt (17, 18) are pulled off at times which ensure that they run into the next processing station in the correct position and at a time coordinated exactly with the machine cycle of the following processing device, and
    in that in order to control the pressure roll (49), a control device (47) is provided which uses the signals from a sensor (43) registering the leading edge of the trailing workpiece (13) and from a signal generator (44) reporting the correct position of this workpiece (13) on the onward conveyor (41) to determine the lowering time of the pressure roll (49).
  2. Device according to Claim 1, characterized in that the signal generator (44) is a sensor which registers the angular position of the deflection roller (42) on the output side of the onward conveyor belt (41) and generates signals with an identical circumferential distribution corresponding to these rotating marks.
EP96108751A 1995-07-07 1996-05-31 Device for separating flat stacked objects Expired - Lifetime EP0752383B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19524878 1995-07-07
DE19524878 1995-07-07
DE19539935 1995-10-26
DE19539935A DE19539935C2 (en) 1995-07-07 1995-10-26 Device for feeding flat objects

Publications (3)

Publication Number Publication Date
EP0752383A2 EP0752383A2 (en) 1997-01-08
EP0752383A3 EP0752383A3 (en) 1997-06-11
EP0752383B1 true EP0752383B1 (en) 2002-05-15

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Application Number Title Priority Date Filing Date
EP96108751A Expired - Lifetime EP0752383B1 (en) 1995-07-07 1996-05-31 Device for separating flat stacked objects

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US (1) US5785310A (en)
EP (1) EP0752383B1 (en)
JP (1) JPH0930672A (en)
KR (1) KR100254706B1 (en)
CN (1) CN1064638C (en)
AT (1) ATE217599T1 (en)
CZ (1) CZ156296A3 (en)
DE (1) DE19549675B4 (en)

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KR970006142A (en) 1997-02-19
KR100254706B1 (en) 2000-10-02
EP0752383A2 (en) 1997-01-08
ATE217599T1 (en) 2002-06-15
CN1145874A (en) 1997-03-26
CN1064638C (en) 2001-04-18
EP0752383A3 (en) 1997-06-11
DE19549675B4 (en) 2005-02-17
US5785310A (en) 1998-07-28
CZ156296A3 (en) 1997-09-17
JPH0930672A (en) 1997-02-04

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