EP0752383A2 - Device for separating flat stacked objects - Google Patents

Device for separating flat stacked objects Download PDF

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Publication number
EP0752383A2
EP0752383A2 EP96108751A EP96108751A EP0752383A2 EP 0752383 A2 EP0752383 A2 EP 0752383A2 EP 96108751 A EP96108751 A EP 96108751A EP 96108751 A EP96108751 A EP 96108751A EP 0752383 A2 EP0752383 A2 EP 0752383A2
Authority
EP
European Patent Office
Prior art keywords
workpiece
suction
conveyor
roller
stack
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP96108751A
Other languages
German (de)
French (fr)
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EP0752383B1 (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
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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 for separating stacked flat objects according to the preamble of patent claim 1.
  • So-called rotary feeders (see, for example, DE-OS 15 36 489, DE-OS 32 08 425, DE-OS 32 14 342), which consist of suction rolls rotatably mounted in rotating drums, are known for separating flat workpieces stacked in stacks as they pass under a stack supported by the drum, suck in the bottom workpiece of the stack at its front edge, pull it off and transfer the individual workpieces thereby to a further conveyor.
  • the separation of workpiece packages with such rotary feeders is problematic at a high separation speed, because the package supported on the rotating drum of the rotary feeder can vibrate in such a way that a secure grasping of the bottom workpiece of the stack by the suction rollers is no longer guaranteed.
  • Stacked flat workpieces can be separated at high speed using a device of the type specified at the outset, which is known from DE-27 32 591 C2.
  • this known device it is problematic to place the isolated rectangular objects on the conveying conveyor in such a way that that its side edges are aligned parallel to the conveying direction. Because the side edge or part of this side edge pulled off by the suction cups hits the conveying conveyor at a point in time at which part of the workpiece is still held in contact with the underside of the stack, so that it occurs when the peeled workpiece is deposited the conveying conveyor can come to its warping in such a way that there is no straight storage. It must be doubted that a straight-edged deposit can be achieved on the conveying conveyor if it runs at an acute angle to the moving roller grate in the manner shown in DE-27 32 591 C2.
  • the object of the invention is therefore to provide a device of the type mentioned in the introduction, in which the isolated rectangular workpieces can be removed with side edges parallel to the direction of conveyance of the conveying conveyor.
  • this object is achieved in a device according to the preamble of patent claim 1 by the characterizing features of patent claim 1. Due to the different speeds of the two conveying elements, a distortion of the workpieces which are in each case removed from the stack and dropped onto a conveyor is compensated for by the fact that these are rotated by the different speeds of the two conveyors into a straight-edged position in which the side edges of the separated workpieces are parallel to the conveying direction of the conveyor belt divided into two suction belt conveyors.
  • the conveyor system consists of two suction belt conveyors, one of which Suction belt conveyor, on which the sucked-in side edge of the workpiece in question falls, is driven more slowly than the other suction belt conveyor, on which the part of the workpiece that was last peeled off from the stack lies.
  • the conveyor that conveys the individual workpieces can run at an angle to the moving roller grate.
  • the conveyor that conveys the individual workpieces preferably runs at right angles to the traveling roller grate.
  • the speeds of the two suction belt conveyors of the divided conveyor belt can be adjusted separately from one another, so that the straight position of the individual workpieces on the conveying conveyor belt can be adjusted depending on the speed of the moving roller grate and the suction belt conveyor.
  • the speeds of the two suction belt conveyors are expediently also continuously adjustable during operation.
  • the two suction belt conveyors only extend over such a long length that the rectangular workpieces conveyed by them are aligned with lateral edges lying parallel to the conveying direction. After this desired alignment, the separated workpieces are then expediently handed over to a further conveyor, on which the workpieces can no longer be warped.
  • the speeds of the two suction belt conveyors are expediently coordinated with one another in such a way that the workpieces reach the joint discharge end of both suction belt conveyors in a straight line.
  • Such a configuration ensures that the individual workpieces are edged straight to a further conveyor can be handed over.
  • a second conveyor belt which rotates at a higher speed, is connected to the first conveyor belt consisting of two divided suction belt conveyors.
  • a pressure roller which can be lowered on this can cooperate and is controlled in such a way that the workpieces are pulled off the first conveyor belt at times which ensure a correct and timely entry into downstream processing stations which is matched to the machine cycle of downstream machining devices.
  • a control device can be provided which determines the lowering times of the pressure roller from the signals of a sensor which detects the front edge of the trailing workpiece and a signal transmitter which signals the correct position of this workpiece on the conveyor belt which is conveying onward.
  • the signal transmitter can be a sensor which detects the angular position of the feed-side deflection roller of the conveyor belt which is conveying onward and correspondingly generates signals with this rotating mark with the same circumferential distribution.
  • staggered tube pieces are often used to produce bags from tube pieces, in which the upper tube wall overlaps the lower one on a cut edge.
  • a staggered tube piece made of single-layer paper is known, for example, from US Pat. No. 421,191. According to an inventive further development, it is therefore provided for the safe separation of stacked staggered hose pieces with a suction device that sucks the bottom hose piece of the stack at one edge for the purpose of peeling off the stack or pulling off, that the suction device the upper hose piece wall, which is the lower hose piece overlaps, sucks.
  • Staggered hose pieces can also consist of multilayer side walls, the individual layers of the side walls then being arranged with respect to one another in such a way that they successively overlap one another. If multi-layer staggered hose pieces are to be separated, the suction device expediently also sucks at least partially the upper paper layer of the upper hose piece wall.
  • the separating device 1 consists of a machine frame with the side parts 2, 3, on the inner sides of which are attached via holding pieces 4, 5 guide tracks 6, 7 for rollers 8 rotating thereon.
  • the two guide tracks 6, 7 arranged parallel to one another each consist of upper and lower sections running parallel to one another, which are connected to one another by approximately semicircular sections.
  • the rollers 8, which are guided on the guideways 6, 7 and arranged at equal intervals parallel to one another, are attached at their ends to endless chains or traction elements which run in guides (not shown) and are driven by drives (not shown).
  • the rollers 8 consist of cylindrical tube pieces which are freely rotatable on axles, the axle journals 10 of which are attached to the chains or traction elements which move them via the guideways 6, 7.
  • the rollers rotating over the guideways 6, 7 on endless chains or traction means form with their upper run 11 a moving roller grate, above which a cassette 12 forming a stacking magazine is held on the side parts 2, 3, which serves to hold stacked pieces of paper tube 13 which are processed into paper bags after they have been separated in downstream processing stations.
  • the cassette 12 has four side walls, of which at least one side wall 14 in the direction of the double arrow by a manually operated spindle drive can be adjusted to different tube piece formats.
  • the bottom of the stacking cassette 12 is formed by the upper run 11 of the traveling roller grate.
  • a conveyor belt 16 is arranged between this and the lower run of the traveling roller grate, which consists of parallel suction belt conveyors 17, 18.
  • the conveyor belt 16 runs at right angles to the running direction of the moving roller grate.
  • the front deflecting rollers 20 of the two suction belt conveyors 17, 18 which run parallel next to one another are mounted on brackets 21 which are fastened to the side frame 2.
  • the endless conveyor belts 17, 18 pass through a rectangular window-like cutout 22 of the side frame 3 and run over the driven deflection rollers 23, 24 forming the discharge ends, which are mounted in the machine frame in a manner not shown.
  • the driven deflection rollers 23, 24 are driven by controlled geared motors M1 and M2 at different speeds, as can be seen schematically in FIG. 2.
  • the endless conveyor belts 17, 18 provided with corresponding rows of perforations run over suction boxes 25, 26, which are fastened to the side parts 2, 3 in a manner not shown and are at least over the length of the stacking cassette 12 below it in the one from FIGS. 1 and 3 visible way.
  • the traveling 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 provided on their underside with the friction-increasing linings 32, to which the lateral end regions of the freely rotatable, shell-made roller sleeves of the rollers 8 are pressed during their passage under the cassette, so that they are set into a rotating movement with which they are supported in the manner shown in FIG. 3 on the lowest tube piece stacked in the cassette 12.
  • the drive of the two suction cups 35 which can be raised and lowered in time with the passage of the rollers 8, is shown schematically in FIG. 4.
  • the type of peeling of the bottom workpiece from the stacking cassette and the drive of the liftable and lowerable suction device corresponds to the illustration and description in DE-27 32 591 C2, to which reference is made for a more detailed illustration.
  • two singles 35 provided in pairs are provided in the singulation device according to the invention, which each act simultaneously on opposite end regions of the rear edges of the workpieces to be singled.
  • the suction cups 35 are also connected in the manner described in DE-27 32 591 C2 to suction air sources which supply the suction devices 35 with suction air in time.
  • the delay resulting from this type of storage of the successively deposited workpieces is compensated for by the different speeds of the suction belt conveyors 17, 18, of which the suction belt conveyor 17 is driven at a lower speed than the suction belt conveyor 18.
  • the speed of the two suction belt conveyors 17, 18 is over the separately controllable geared motors M1 and M2 adjustable.
  • a computer 40 is provided, which detects the position of the hose pieces thrown onto the suction belt conveyors 17, 18 via sensors 43 and controls the geared motors M1, M2 in such a way that any misalignment is determined such that a delay due to the different speeds the suction belt conveyor is balanced.
  • the speed of the suction belt conveyor can also be adjusted by hand after visual assessment.
  • the separating device is connected upstream of a so-called floor layer of a sack manufacturing machine, in which the bottoms, for example cross bottoms, are formed on the sides of the tube pieces provided with the cut edges.
  • the hose sections are transferred from the suction belt conveyors 17, 18 in register, that is, in a manner to the conveyor belt 41, which forms the infeed conveyor into the floor layer, that the workpieces are taken over by this in the correct position at times which are matched to the machine cycle of the subsequent processing stations, so that a timely and correct entry of the workpieces into downstream processing stations is ensured.
  • the front deflection roller 42 of the conveying conveyor 41 is driven by the geared motor M1 at a higher speed, so that the conveying conveyor belt 41 rotates at a higher speed than the two suction belt conveyors 17, 18
  • the suction belts 17, 18 transfer the workpieces in such a way that they run onto or over the drive roller 42 of the conveyor 41 at a time during which the workpiece is still held by the suction boxes 25, 26.
  • the position of the respective front edge of the workpiece 13 fed in is determined by a sensor 43.
  • a sensor 44 (incremental encoder) scans teeth or other rastered marks which are connected to the drive roller 42 of the conveyor 41.
  • the sensor 44 forms signals which report the precise passage of a point 46 through the downstream processing device.
  • the computer 47 From the signals of the sensors 43, 44, the computer 47 forms a signal for a drive 48 of a pressure roller 49 that can be raised and lowered, which is lowered onto the drive roller 42 at the correct time in time with the downstream processing machine, and thus a frictional engagement of the workpiece 13 with the conveying conveyor 41 causes so that each workpiece 13 in the correct position and in time from the conveyor 41st is taken over.
  • the tube pieces can be provided with cross bottoms or else with folded bottoms, which are molded onto so-called staggered tube pieces.
  • a staggered tube piece 50 is shown enlarged, the walls of which are constructed in three layers, the individual layers of each side wall also being staggered with respect to one another.
  • the suction device 35 engages the layers of the upper wall which overlap the layers of the lower hose wall, so that the sucked-in end of the hose section is completely pulled out of the stacking magazine without any further 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 zum Vereinzeln gestapelter flacher Gegenstände nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for separating stacked flat objects according to the preamble of patent claim 1.

Zur Vereinzelung von in Stapeln gestapelten flachen Werkstücken sind sog. Rotationsanleger (s. z. B. DE-OS 15 36 489, DE-OS 32 08 425, DE-OS 32 14 342) bekannt, die aus in rotierenden Trommeln drehbar gelagerten Saugwalzen bestehen, die bei ihrem Durchlauf unter einen durch die Trommel abgestützten Stapel das unterste Werkstück des Stapels an seiner Vorderkante ansaugen, abziehen und die dadurch vereinzelten Werkstücke an einen weiterfördernden Förderer übergeben. Die Vereinzelung von Werkstückpaketen mit derartigen Rotationsanlegern ist jedoch bei einer hohen Vereinzelungsgeschwindigkeit problematisch, weil das auf der rotierenden Trommel des Rotationsanlegers abgestützte Paket derart in Schwingungen geraten kann, daß ein sicheres Erfassen des jeweils untersten Werkstücks des Stapels durch die Saugwalzen nicht mehr gewährleistet ist.So-called rotary feeders (see, for example, DE-OS 15 36 489, DE-OS 32 08 425, DE-OS 32 14 342), which consist of suction rolls rotatably mounted in rotating drums, are known for separating flat workpieces stacked in stacks as they pass under a stack supported by the drum, suck in the bottom workpiece of the stack at its front edge, pull it off and transfer the individual workpieces thereby to a further conveyor. The separation of workpiece packages with such rotary feeders is problematic at a high separation speed, because the package supported on the rotating drum of the rotary feeder can vibrate in such a way that a secure grasping of the bottom workpiece of the stack by the suction rollers is no longer guaranteed.

Mit hoher Geschwindigkeit lassen sich gestapelte flache Werkstücke mit einer Vorrichtung der eingangs angegeben Art vereinzeln, die aus DE-27 32 591 C2 bekannt ist. 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.Stacked flat workpieces can be separated at high speed using a device of the type specified at the outset, which is known from DE-27 32 591 C2. In this known device, however, it is problematic to place the isolated rectangular objects on the conveying conveyor in such a way that that its side edges are aligned parallel to the conveying direction. Because the side edge or part of this side edge pulled off by the suction cups hits the conveying conveyor at a point in time at which part of the workpiece is still held in contact with the underside of the stack, so that it occurs when the peeled workpiece is deposited the conveying conveyor can come to its warping in such a way that there is no straight storage. It must be doubted that a straight-edged deposit can be achieved on the conveying conveyor if it runs at an acute angle to the moving roller grate in the manner shown in DE-27 32 591 C2.

Aufgabe der Erfindung ist es daher, eine Vorrichtung der eingangs angegebenen Art zu schaffen, bei der die vereinzelten rechteckigen Werkstücke mit zu der Förderrichtung des weiterfördernden Förderers parallelen Seitenkanten abgefördert werden können.The object of the invention is therefore to provide a device of the type mentioned in the introduction, in which the isolated rectangular workpieces can be removed with side edges parallel to the direction of conveyance of the conveying conveyor.

Erfindungsgemäß wird diese Aufgabe bei einer Vorrichtung nach dem Oberbegriff des Patentanspruchs 1 durch die kennzeichnenden Merkmale des Patentanspruch 1 gelöst. Durch die unterschiedlichen Geschwindigkeiten der beiden Förderelemente wird ein Verzug der jeweils von dem Stapel abgezogenen und auf einen Förderer abgeworfenen Werkstücke dadurch wieder ausgeglichen, daß diese durch die unterschiedlichen Geschwindigkeiten der beiden Förderer in eine kantengerade Stellung gedreht werden, in der die Seitenkanten der vereinzelten Werkstücke parallel zu der Förderrichtung des in zwei Saugbandförderer unterteilten Förderbandes sind.According to the invention, this object is achieved in a device according to the preamble of patent claim 1 by the characterizing features of patent claim 1. Due to the different speeds of the two conveying elements, a distortion of the workpieces which are in each case removed from the stack and dropped onto a conveyor is compensated for by the fact that these are rotated by the different speeds of the two conveyors into a straight-edged position in which the side edges of the separated workpieces are parallel to the conveying direction of the conveyor belt divided into two suction belt conveyors.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß das Fördersystem aus zwei Saugbandförderern besteht, von denen der Saugbandförderer, auf den die angesaugte Seitenkante des jeweils angesaugten Werkstücks fällt, langsamer angetrieben ist als der andere Saugbandförderer, auf den sich der zuletzt von dem Stapel abgeschälte Teil des Werkstücks legt.According to a preferred embodiment it is provided that the conveyor system consists of two suction belt conveyors, one of which Suction belt conveyor, on which the sucked-in side edge of the workpiece in question falls, is driven more slowly than the other suction belt conveyor, on which the part of the workpiece that was last peeled off from the stack lies.

Der die vereinzelten Werkstücke abförderende Förderer kann winkelig zu dem wandernden Walzenrost verlaufen. Vorzugsweise verläuft der die vereinzelten Werkstücke abfördernde Förderer jedoch rechtwinkelig zu dem wandernden Walzenrost.The conveyor that conveys the individual workpieces can run at an angle to the moving roller grate. However, the conveyor that conveys the individual workpieces preferably runs at right angles to the traveling roller grate.

Nach einer bevorzugten Ausführungsform ist vorgesehen, daß die Geschwindigkeiten der beiden Saugbandförderer des geteilten Förderbandes getrennt voneinander einstellbar sind, so daß sich je nach der Geschwindigkeit des wandernden Walzenrosts und der Saugbandförderer die kantengerade Lage der vereinzelten Werkstücke auf dem abfördernden Förderband einstellen läßt. Zweckmäßigerweise sind die Geschwindigkeiten der beiden Saugbandförderer auch stufenlos während des Betriebes einstellbar.According to a preferred embodiment it is provided that the speeds of the two suction belt conveyors of the divided conveyor belt can be adjusted separately from one another, so that the straight position of the individual workpieces on the conveying conveyor belt can be adjusted depending on the speed of the moving roller grate and the suction belt conveyor. The speeds of the two suction belt conveyors are expediently also continuously adjustable during operation.

In weiterer Ausgestaltung der Erfindung ist vorgesehen, daß sich die beiden Saugbandförderer nur über eine so große Länge erstrecken, daß die von diesen geförderten rechteckigen Werkstücke mit parallel zur Förderrichtung liegenden seitlichen Kanten ausgerichtet werden. Nach dieser gewünschten Ausrichtung werden sodann die vereinzelten Werkstücke zweckmäßigerweise an einen weiterfördernden Förderer übergeben, auf dem kein Verzug der Werkstücke mehr erfolgen kann.In a further embodiment of the invention it is provided that the two suction belt conveyors only extend over such a long length that the rectangular workpieces conveyed by them are aligned with lateral edges lying parallel to the conveying direction. After this desired alignment, the separated workpieces are then expediently handed over to a further conveyor, on which the workpieces can no longer be warped.

Zweckmäßigerweise sind die Geschwindigkeiten der beiden Saugbandförderer so aufeinander abgestimmt, daß die Werkstücke kantengerade das gemeinsame Abgabeende beider Saugbandförderer erreichen. Eine derartige Ausgestaltung stellt sicher, daß die vereinzelten Werkstücke kantengerade an einen weiterfördernden Förderer übergeben werden können.The speeds of the two suction belt conveyors are expediently coordinated with one another in such a way that the workpieces reach the joint discharge end of both suction belt conveyors in a straight line. Such a configuration ensures that the individual workpieces are edged straight to a further conveyor can be handed over.

Nach einer erfinderischen Weiterentwicklung ist vorgesehen, daß an das erste, aus zwei geteilten Saugbandförderern bestehende Förderband ein zweites weiterförderndes Förderband anschließt, das mit höherer Geschwindigkeit umläuft. Mit der aufgabeseitigen Umlenkrolle des weiterfördernden Förderbandes kann eine auf diese absenkbare Andrückwalze zusammenwirken, die derart gesteuert ist, daß die Werkstücke von dem ersten Förderband zu Zeitpunkten abgezogen werden, die einen lagerichtigen und auf den Maschinentakt nachgeschalteter Bearbeitungseinrichtungen abgestimmten zeitgenauen Einlauf in nachgeschaltete Bearbeitungsstationen gewährleisten.According to an inventive further development, it is provided that a second conveyor belt, which rotates at a higher speed, is connected to the first conveyor belt consisting of two divided suction belt conveyors. With the feed-side deflecting roller of the conveyor belt which is conveying further, a pressure roller which can be lowered on this can cooperate and is controlled in such a way that the workpieces are pulled off the first conveyor belt at times which ensure a correct and timely entry into downstream processing stations which is matched to the machine cycle of downstream machining devices.

Zur Steuerung der Andrückwalze kann eine Steuereinrichtung vorgesehen sein, die aus den Signalen eines die Vorderkante des nachlaufenden Werkstücks erfassenden Sensors und eines die richtige Position dieses Werkstücks auf dem weiterfördernden Förderband meldenden Signalgebers die Absenkzeitpunkte der Andrückwalze bestimmt.To control the pressure roller, a control device can be provided which determines the lowering times of the pressure roller from the signals of a sensor which detects the front edge of the trailing workpiece and a signal transmitter which signals the correct position of this workpiece on the conveyor belt which is conveying onward.

Der Signalgeber kann ein Sensor sein, der die Winkelstellung der aufgabeseitigen Umlenkrolle des weiterfördernden Förderbandes erfaßt und entsprechend mit dieser rotierenden Marken mit gleicher Umfangsverteilung Signale erzeugt.The signal transmitter can be a sensor which detects the angular position of the feed-side deflection roller of the conveyor belt which is conveying onward and correspondingly generates signals with this rotating mark with the same circumferential distribution.

Ein besonderes Problem bei der Vereinzelung von Werkstücken aus Stapeln durch Sauger, die jeweils das unterste Werkstück des Stapels zum Zwecke der Vereinzelung abziehen oder herabziehen, ergibt sich dann, wenn es sich bei diesen Werkstücken um flachliegende Schlauchstücke handelt, die jeweils an ihren Schnittkanten angesaugt werden. Denn bei einem derartigen Ansaugen wird nur die untere Wandung des Schlauchstücks erfaßt, wobei möglicherweise die obere Wandung noch in Anlage an den Stapel verbleibt. Ein derartiges Ansaugen zum Zwecke der Vereinzelung kann selbstverständlich zu erheblichen Störungen führen.A particular problem with the separation of workpieces from stacks by suction devices, which each pull or pull down the lowest workpiece of the stack for the purpose of separation, arises when these workpieces are flat tube pieces that are sucked in at their cut edges . Because with such a suction, only the lower wall of the hose piece is detected, possibly the upper wall remains in contact with the stack. Such a suction for the purpose of separation can of course lead to considerable disturbances.

Zur Herstellung von Säcken aus Schlauchstücken werden häufig sog. Staffelschlauchstücke verwendet, bei denen an einer Schnittkante die obere Schlauchwandung die untere überlappt. Ein derartiges Staffelschlauchstück aus einlagigem Papier ist beispielsweise aus der US-PS 421 191 bekannt. Nach einer erfinderischen Weiterentwicklung ist daher zum sicheren Vereinzeln von gestapelten Staffelschlauchstücken mit einem Sauger, der das jeweils unterste Schlauchstück des Stapels an einer Kante zum Zwecke des Abschälens von dem Stapel oder Abziehens ansaugt, vorgesehen, daß der Sauger die oberen Schlauchstückwand, die das untere Schlauchstück überlappt, ansaugt.So-called staggered tube pieces are often used to produce bags from tube pieces, in which the upper tube wall overlaps the lower one on a cut edge. Such a staggered tube piece made of single-layer paper is known, for example, from US Pat. No. 421,191. According to an inventive further development, it is therefore provided for the safe separation of stacked staggered hose pieces with a suction device that sucks the bottom hose piece of the stack at one edge for the purpose of peeling off the stack or pulling off, that the suction device the upper hose piece wall, which is the lower hose piece overlaps, sucks.

Staffelschlauchstücke können auch aus mehrlagigen Seitenwänden bestehen, wobei dann auch die einzelnen Lagen der Seitenwände derart zueinander angeordnet sind, daß diese aufeinanderfolgend einander überlappen. Sind mehrlagige Staffelschlauchstücke zu vereinzeln, saugt der Sauger zweckmäßigerweise zumindest teilweise auch die obere Papierlage der oberen Schlauchstückwandung an.Staggered hose pieces can also consist of multilayer side walls, the individual layers of the side walls then being arranged with respect to one another in such a way that they successively overlap one another. If multi-layer staggered hose pieces are to be separated, the suction device expediently also sucks at least partially the upper paper layer of the upper hose piece wall.

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 Förderbands mit dem an dieses anschließenden weiterfördernden Förderband,
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 inner sides of which are attached via holding pieces 4, 5 guide tracks 6, 7 for rollers 8 rotating thereon. The two guide tracks 6, 7 arranged parallel to one another each consist of upper and lower sections running parallel to one another, which are connected to one another by approximately semicircular sections. The rollers 8, which are guided on the guideways 6, 7 and arranged at equal intervals parallel to one another, are attached at their ends to endless chains or traction elements which run in guides (not shown) and are driven by drives (not shown). The rollers 8 consist of cylindrical tube pieces which are freely rotatable on axles, the axle journals 10 of which are attached to the chains or traction elements which move them via the guideways 6, 7.

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 rollers rotating over the guideways 6, 7 on endless chains or traction means form with their upper run 11 a moving roller grate, above which a cassette 12 forming a stacking magazine is held on the side parts 2, 3, which serves to hold stacked pieces of paper tube 13 which are processed into paper bags after they have been separated in downstream processing stations. The cassette 12 has four side walls, of which at least one side wall 14 in the direction of the double arrow by 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 formed by the upper run 11 of the traveling 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 of the traveling roller grate, a conveyor belt 16 is arranged between this and the lower run of the traveling roller grate, which consists of parallel suction belt conveyors 17, 18. The conveyor belt 16 runs at right angles 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 suction belt conveyors 17, 18 which run parallel next to one another are mounted on brackets 21 which are fastened to the side frame 2. The endless conveyor belts 17, 18 pass through a rectangular window-like cutout 22 of the side frame 3 and run over the driven deflection rollers 23, 24 forming the discharge ends, which are mounted in the machine frame in a manner not shown. The driven deflection rollers 23, 24 are driven by controlled geared motors M1 and M2 at different speeds, as can be seen schematically in 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 conveyor belts 17, 18 provided with corresponding rows of perforations run over suction boxes 25, 26, which are fastened to the side parts 2, 3 in a manner not shown and are at least over the length of the stacking cassette 12 below it in the one from FIGS. 1 and 3 visible way.

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 traveling 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 provided on their underside with the friction-increasing linings 32, to which the lateral end regions of the freely rotatable, shell-made roller sleeves of the rollers 8 are pressed during their passage under the cassette, so that they are set into a rotating movement with which they are supported in the manner shown in FIG. 3 on the lowest tube piece stacked in the cassette 12.

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 a roller 8 runs under the cassette 12, two suction cups 35 which are arranged on the left end region of the cassette and can be lifted and lowered laterally on the left end region shown in FIG. 3 grasp the lower front side edge 6 of the lowest stacked hose piece, which is shown in the representation according to FIG. 3 is located on the left, and pull it behind the roller 8 that has just passed through and in front of the trailing roller 8, so that the subsequent roller 8 runs into the wedge-shaped gap between the pulled-down front end of the tube piece and the end region of the next tube piece that is thereby exposed, which then is pulled down again in a corresponding manner by the suction cups moving up and down in time.

Der Antrieb der beiden im Takt des Durchlaufs der Walzen 8 heb- und senkbaren Sauger 35 ist schematisch in Fig. 4 dargestellt.The drive of the two suction cups 35, which can be raised and lowered in time with the passage of the rollers 8, 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 suction device corresponds to the illustration and description in DE-27 32 591 C2, to which reference is made for a more detailed illustration. In contrast to the device described in this publication, however, two singles 35 provided in pairs are provided in the singulation device according to the invention, which each act simultaneously on opposite end regions of the rear edges of the workpieces to be singled. The suction cups 35 are also connected in the manner described in DE-27 32 591 C2 to suction air sources which supply the suction devices 35 with suction air in time.

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 pieces of hose sequentially separated from below from the stack held in the cassette 12, after being pulled off in the manner shown in FIG. 3, first hit the suction belt 17 with their side edge first pulled off, while the part still adhering to the stack passes through the continuous rollers 8 of the moving roller grate is increasingly peeled off the stack until the opposite side also completely falls on the other suction belt 18. The delay resulting from this type of storage of the successively deposited workpieces is compensated for by the different speeds of the suction belt conveyors 17, 18, of which the suction belt conveyor 17 is driven at a lower speed than the suction belt conveyor 18. The speed of the two suction belt conveyors 17, 18 is over 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.To control the geared motors M1, M2, a computer 40 is provided, which detects the position of the hose pieces thrown onto the suction belt conveyors 17, 18 via sensors 43 and controls the geared motors M1, M2 in such a way that any misalignment is determined such that a delay due to the different speeds the suction belt conveyor is balanced. Of course, the speed of the suction belt conveyor can also be adjusted 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 Säcken 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 connected upstream of a so-called floor layer of a sack manufacturing machine, in which the bottoms, for example cross bottoms, are formed on the sides of the tube pieces provided with the cut edges. To the isolated and transversely conveyed hose sections to be able to process them into bags without interference, it is necessary that the hose sections are transferred from the suction belt conveyors 17, 18 in register, that is, in a manner to the conveyor belt 41, which forms the infeed conveyor into the floor layer, that the workpieces are taken over by this in the correct position at times which are matched to the machine cycle of the subsequent processing stations, so that a timely and correct entry of the workpieces into downstream processing stations is ensured.

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 conveying conveyor belt 41 rotates at a higher speed than the two suction belt conveyors 17, 18 To ensure workpieces, the suction belts 17, 18 transfer the workpieces in such a way that they run onto or over the drive roller 42 of the conveyor 41 at a time during which the workpiece is still held by the suction boxes 25, 26. The position of the respective front edge of the workpiece 13 fed in is determined by a sensor 43. A sensor 44 (incremental encoder) scans teeth or other rastered marks which are connected to the drive roller 42 of the conveyor 41. The sensor 44 forms signals which report the precise passage of a point 46 through the downstream processing device. From the signals of the sensors 43, 44, the computer 47 forms a signal for a drive 48 of a pressure roller 49 that can be raised and lowered, which is lowered onto the drive roller 42 at the correct time in time with the downstream processing machine, and thus a frictional engagement of the workpiece 13 with the conveying conveyor 41 causes so that each workpiece 13 in the correct position and in time from the conveyor 41st 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 tube pieces can be provided with cross bottoms or else with folded bottoms, which are molded onto so-called staggered 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 tube piece 50 is shown enlarged, the walls of which are constructed in three layers, the individual layers of each side wall also being staggered with respect to one another.

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.In order to avoid pulling off only the lower wall of the hose section from the stacking magazine, the suction device 35 engages the layers of the upper wall which overlap the layers of the lower hose wall, so that the sucked-in end of the hose section is completely pulled out of the stacking magazine without any further an upper wall sticks to it.

Claims (13)

Vorrichtung zum Vereinzeln gestapelter flacher Gegenstände, vorzugsweise zum Vereinzeln von zu Säcken zu verarbeitender gestapelter Schlauchstücke, mit einem Stapelmagazin, dessen den Stapel stützender Boden aus durchlaufenden, an dem jeweils untersten Werkstück abrollenden Walzen eines wandernden Walzenrostes besteht, dessen Walzen umlaufend bewegt werden,
miteienem unter dem Obertrum des Walzenrosts angeordneten und winkelig zu diesem verlaufenden Fördersystem, auf den das jeweils unterste, von einer durchlaufenden Walze von dem Stapel abgeschälte Werkstück abgeworfen wird, und
mit einem im Takt des Durchlaufs der Walzen zwischen diese greifendem Sauger bzw. greifenden Saugern, der bzw. die eine Seitenkante des jeweils untersten Werkstücks derart zwischen zwei Walzen herabzieht, daß die vorlaufende Walze den Stapel noch über das Werkstück abstützt und die nachlaufende Walze zwischen dem Werkstück und dem darüber befindlichen Werkstück durchläuft und eine sichere Trennung des jeweils untersten Werkstücks von dem Stapel bewirkt,
dadurch gekennzeichnet,
daß das abfördernde Fördersystem aus parallel zueinander laufenden Förderelementen besteht, die mit unterschiedlichen Geschwindigkeiten antreibbar sind.Device for separating stacked flat objects, preferably for separating stacked pieces of hose to be processed into sacks, with a stacking magazine, the base of which supports the stack, consisting of continuous rolls of a traveling roller grate rolling on the bottom workpiece, the rolls of which are moved in a rotating manner,
miteienem arranged below the upper run of the roller grate and at an angle to this running conveyor system onto which the lowest workpiece peeled off from the stack by a continuous roller is dropped, and
with one in time with the passage of the rollers between these gripping suction or gripping suction, or the one side edge of the bottom workpiece in each case between two rollers so that the leading roller still supports the stack over the workpiece and the trailing roller between the Passes through the workpiece and the workpiece above it and reliably separates the bottom workpiece from the stack,
characterized by
that the conveying conveyor system consists of mutually parallel conveying elements which can be driven at different speeds. Vorrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß das Fördersystem aus zwei Saugbandförderern besteht, von denen der Saugbandförderer, auf den die angesaugte Seitenkante des jeweils angesaugten Werkstücks fällt, langsamer angetrieben ist als der andere Saugbandförderer, auf den sich der zuletzt von dem Stapel abgeschälte Teil des Werkstücks legt.Device according to claim 1,
characterized by
that the conveyor system consists of two suction belt conveyors, of which the suction belt conveyor, on which the sucked-in side edge of the workpiece in question falls, is driven more slowly than the other suction belt conveyor, on which the part of the workpiece last peeled off from the stack lies. Vorrichtung nach den Ansprüchen 1 und 2,
dadurch gekennzeichnet,
daß die beiden Saugbandförderer rechtwinkelig zu dem wandernden Walzenrost verlaufen.Device according to claims 1 and 2,
characterized by
that the two suction belt conveyors run at right angles to the moving roller grate. Vorrichtung nach den Ansprüchen 1 bis 3,
dadurch gekennzeichnet,
daß die Geschwindigkeit der beiden Saugbandförderer des geteilten Förderbandes getrennt voneinander einstellbar sind.Device according to claims 1 to 3,
characterized by
that the speed of the two suction belt conveyors of the divided conveyor belt can be set separately from one another. Vorrichtung nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß die beiden Saugbandförderer sich nur über eine so große Länge erstrecken, daß die von diesen geförderten, rechteckigen Werkstücke mit parallel zur Förderrichtung liegenden seitlichen Kanten ausgerichtet werden.Device according to one of claims 1 to 4,
characterized by
that the two suction belt conveyors only extend over such a long length that the rectangular workpieces conveyed by them are aligned with lateral edges lying parallel to the conveying direction. Vorrichtung nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß die Geschwindigkeiten der beiden Saugbandförderer so aufeinander abgestimmt sind, daß die Werkstücke kantengerade das gemeinsame Abgabeende der beiden Saugbandförderer erreichen.Device according to one of claims 1 to 5,
characterized by
that the speeds of the two suction belt conveyors are matched to one another such that the workpieces reach the common discharge end of the two suction belt conveyors in a straight line. Vorrichtung nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß an das erste aus zwei geteilten Saugbandförderern bestehende Förderband ein zweites weiterförderndes Förderband anschließt, das mit höherer Geschwindigkeit umläuft.Device according to one of claims 1 to 6,
characterized by
that a second conveyor belt, which rotates at a higher speed, connects to the first conveyor belt consisting of two divided suction belt conveyors. Vorrichtung nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
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 nachfolgenden Bearbeitungsvorrichtungen abgestimmten zeitgenauen Einlauf in nachgeschaltete Bearbeitungsstationen gewährleisten.Device according to one of claims 1 to 7,
characterized by
that cooperates with the feed-side deflecting roller of the conveyor belt further on this lowerable pressure roller, which is controlled such that the workpieces from the first conveyor belt are withdrawn at times that ensure a correct and timely entry into downstream processing stations that are coordinated with the machining devices following the machine cycle. Vorrichtung nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß zur Steuerung der Andrückwalze eine Steuervorrichtung vorgesehen ist, die aus den Signalen eines die Vorderkante des nachlaufenden Werkstücks erfassenden Sensors und eines die richtige Position dieses Werkstücks auf dem weiterfördernden Förderer meldenden Signalgebers die Absenkzeitpunkte der Andrückwalze bestimmt.Device according to one of claims 1 to 8,
characterized by
that a control device is provided for controlling the pressure roller, which determines the lowering times of the pressure roller from the signals of a sensor which detects the front edge of the trailing workpiece and a signal transmitter which signals the correct position of this workpiece on the conveying conveyor. Vorrichtung nach einem der Ansprüche 1 bis 9,
dadurch gekennzeichnet,
daß der Signalgeber ein Sensor ist, der die Winkelstellung der aufgabeseitigen Umlenkrolle des weiterfördernden Förderbandes erfaßt und entsprechend mit dieser rotierenden Marken mit gleicher Umfangsverteilung Signale erzeugt.Device according to one of claims 1 to 9,
characterized by
that the signal transmitter is a sensor that detects the angular position of the feed-side deflecting roller of the conveyor belt that is conveying further and generates signals with this rotating mark with the same circumferential distribution. Verfahren zum Vereinzeln gestapelter Schlauchstücke mit mindestens einem Sauger, der das jeweils unterste Schlauchstück des Stapels an einer Kante zum Zwecke des Abschälens von dem Stapel oder des Abziehens absaugt,
dadurch gekennzeichnet,
daß der Sauger eine Kante im Bereich einer der Schlauchöffnungen ansaugt.Method for separating stacked tube pieces with at least one suction device, which sucks off the bottom tube piece of the stack at one edge for the purpose of peeling off or pulling off,
characterized by
that the sucker has an edge in the area of one of the hose openings sucks. Verfahren nach Anspruch 11,
dadurch gekennzeichnet,
daß der Sauger die obere Schlauchstückwandung oder mindestens eine der Lagen der oberen Schlauchstückwandung, die die untere Schlauchstückwandung überlappt, ansaugt.A method according to claim 11,
characterized by
that the suction device sucks the upper hose section wall or at least one of the layers of the upper hose section wall which overlaps the lower hose section wall. Verfahren nach Anspruch 11,
dadurch gekennzeichnet,
daß der Sauger zumindest teilweise auch die obere Papierlage der gestaffelt angeordneten Lagen der oberen Schlauchstückwandung ansaugt.A method according to claim 11,
characterized by
that the sucker also sucks at least partially the upper paper layer of the staggered layers of the upper tube wall.
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
DE19539935A DE19539935C2 (en) 1995-07-07 1995-10-26 Device for feeding flat objects
DE19539935 1995-10-26

Publications (3)

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

Family

ID=26016627

Family Applications (1)

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

Country Status (8)

Country Link
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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US6439566B1 (en) 1996-03-29 2002-08-27 Hadewe B.V. Apparatus for separating sheets from a stack

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CN105274899B (en) * 2015-10-27 2017-07-14 广东润丰卫材科技有限公司 One kind smoothes out with the fingers flat equipment
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EP0911288A3 (en) * 1997-10-22 2000-03-29 Graphic Management Associates High speed feeder

Also Published As

Publication number Publication date
EP0752383B1 (en) 2002-05-15
US5785310A (en) 1998-07-28
KR970006142A (en) 1997-02-19
CN1145874A (en) 1997-03-26
ATE217599T1 (en) 2002-06-15
CN1064638C (en) 2001-04-18
JPH0930672A (en) 1997-02-04
CZ156296A3 (en) 1997-09-17
EP0752383A3 (en) 1997-06-11
KR100254706B1 (en) 2000-10-02
DE19549675B4 (en) 2005-02-17

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