EP0559846B1 - Device for turning a sheet with a simultaneous change in the direction of transport - Google Patents

Device for turning a sheet with a simultaneous change in the direction of transport Download PDF

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Publication number
EP0559846B1
EP0559846B1 EP92908174A EP92908174A EP0559846B1 EP 0559846 B1 EP0559846 B1 EP 0559846B1 EP 92908174 A EP92908174 A EP 92908174A EP 92908174 A EP92908174 A EP 92908174A EP 0559846 B1 EP0559846 B1 EP 0559846B1
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EP
European Patent Office
Prior art keywords
gap
sheet
input
output
guide plate
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
EP92908174A
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German (de)
French (fr)
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EP0559846B2 (en
EP0559846A1 (en
Inventor
Johannes Jacobus Maria Kusters
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.)
Pitney Bowes Deutschland GmbH
Original Assignee
Bell and Howell GmbH
Bell and Howell Co
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Application filed by Bell and Howell GmbH, Bell and Howell Co filed Critical Bell and Howell GmbH
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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00Feeding articles separated from piles; Feeding articles to machines
    • B65H5/02Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains
    • B65H5/021Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts
    • B65H5/025Feeding articles separated from piles; Feeding articles to machines by belts or chains, e.g. between belts or chains by belts between belts and rotary means, e.g. rollers, drums, cylinders or balls, forming a transport nip
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H15/00Overturning articles
    • B65H15/004Overturning articles employing rollers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H5/00Feeding articles separated from piles; Feeding articles to machines
    • B65H5/26Duplicate, alternate, selective, or coacting feeds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/30Orientation, displacement, position of the handled material
    • B65H2301/34Modifying, selecting, changing direction of displacement
    • B65H2301/342Modifying, selecting, changing direction of displacement with change of plane of displacement
    • B65H2301/3423Modifying, selecting, changing direction of displacement with change of plane of displacement by travelling an angled curved path section for overturning and changing feeding direction
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00Handling processes for sheets or webs
    • B65H2301/40Type of handling process
    • B65H2301/44Moving, forwarding, guiding material
    • B65H2301/445Moving, forwarding, guiding material stream of articles separated from each other
    • B65H2301/4454Merging two or more streams

Definitions

  • the invention relates to a device for turning a sheet while changing the conveying direction with the features of the preamble of claim 1.
  • a device of this type is known from German Offenlegungsschrift 36 14 103. It contains an entry gap, a diagonally running bending gap and an exit gap, these gaps being formed between a roller arrangement on the one hand and a conveyor belt arrangement on the other, such that a formation of sheets clamped in a positive guide can be partially turned in a helical manner and can be discharged at an angle to the feed direction.
  • the object of the invention is to design a device with the features of the preamble of claim 1 so that an increased level of operational reliability is achieved at high working speed.
  • a multiple juxtaposition of devices of the type specified here not only makes it possible to turn a single sheet and discharge it with a changed conveying direction, but also to separate a plurality of sheets or form sections conveyed side by side in one plane simultaneously with the turning process and the change in the conveying direction in order to separate the Assign individual sheets or form sections to separate sheets or sets of forms after this separation.
  • the exit gap expediently contains, on the one hand, sections of rotating conveyor belts which are moved in the discharge direction and, on the other hand, counter-holding rolling elements assigned to them as the output drive means, the rolling elements preferably being formed by balls held in cages of the guide plate.
  • the device 10 for turning a sheet specified here, while simultaneously changing the conveying direction, is preceded by a feed device 11, in which a feed gap 12 is formed between pairs of opposing guide rods 13 and 14.
  • the guide rods 13 can be held together by transverse connecting rods 15, while the guide rods 14 are held together in a corresponding manner by transverse connecting rods 16.
  • a sheet to be processed by the device for turning and changing the conveying direction is inserted into the feed gap 12 in the direction of the arrow 17 and has the shape of a sheet separated from an endless form, for example by means of a cutting device.
  • Devices upstream of the feed device 11 convey a sheet to be handled into the input gap 12 until the front sheet edge over protrudes the feed gap 12 and enters an input gap 18 of the device for turning and changing the conveying direction.
  • a vacuum holding device 23 blocks further sheet movement, the lower drive rollers 22, which are not provided with a friction lining and driven by a motor 24, under the drive roller assembly pass through the sheet to be conveyed without overcoming the holding force of the vacuum holding device 23.
  • the vacuum holding device 23 is realized by channels 25 opening into vacuum holding openings of the guide rods 14, a control valve 26 and a vacuum source 27.
  • the respective sheet position in which the vacuum holding device 23 is switched on or ineffective can be determined by means of a position indicator 28 in the form of a photocell and a control device 29.
  • the guide walls 19 and 20 converge in the manner shown in FIG. 2 from the input side to the input gap 18, the upper guide wall 19 being fastened to a swivel bracket 30 which is swiveled up about a swivel axis 31 which is mounted in bearing blocks 32 can to the upper guide wall 19 together with the rollers 21 of the drive roller assembly, which are also mounted and held on the swivel bracket 30, from the lower guide wall 20 and the lift off lower arrangement of drive rollers 22 and to make the entrance gap 18 accessible. It should also be noted here that the rollers 21 of the drive roller arrangement are freely supported.
  • the upper guide wall 19 and the lower guide wall 20 extend in the conveying direction of the drive roller arrangement up to a diagonally running bending gap 33, the axis of curvature of which is essentially parallel to the plane of the entrance gap and thus to the plane of the sheet to be handled and is oriented at an angle of 45 degrees to the leading sheet edge, the bending gap 33 being limited on the one hand by a diagonal, curved deflection flange 34 of the upper guide wall and on the other hand by a diagonal, essentially cylindrical deflection body opposite this deflection flange.
  • the upper guide wall 19 designed as a comparatively rigid cover plate thus extends into a diagonal recess of the lower guide wall 20 oriented at 45 degrees to the conveying direction of the drive roller arrangement, the diagonal front edge of the lower guide wall 20 being closed off by the deflecting body 35.
  • the lower guide wall 20 forms the upper end of a guide plate 36, the middle layer 37 of which consists for example of polytetrafluoroethylene and is provided with cage recesses 38 in which rolling elements or balls 39 are accommodated.
  • a table 41 Over which the upper run of conveyor belts 42 and 43 is guided. These conveyor belts are placed over pairs of rollers 44 and 45 or 46 and 47 arranged and supported at the beginning and at the end of the table 41, the rollers 44 and 46 being set in rotation by a drive motor 48.
  • the upper sections or the upper debris of the conveyor belts 42 and 43 and, on the other hand, rows of rolling elements 39 each aligned with the conveyor belts act as conveying devices. This assignment is readily apparent to those skilled in the art from FIGS. 1 and 2.
  • rollers of the pair of rollers 50 which is not shown in FIG is dimensioned in such a way that it protrudes somewhat into the profile of the exit gap 49 and therefore imparts a slight transverse curvature to the sheet being removed, as a result of which the stability of the sheet being removed is increased in a desirable manner.
  • a sheet that has been severed from an endless form is removed from the severing device in the direction of arrow 17 in the feed device 11 entered and advanced so far that the leading edge of the sheet is finally gripped by the drive roller arrangement in the input gap 18 and is further advanced in the input gap 18.
  • the rear edge of the sheet overflows the sensor 28, which generates a signal and causes the control device 29 to put the vacuum holding device 23 into operation by opening the valve 26, so that the sheet now passes through the vacuum suction openings at the outer end of the channels 25 is held and the drive rollers 22 first run empty under the part of the sheet to be handled located in the entry gap 18.
  • the drive roller arrangement 21, 22 pushes the sheet to be handled further in the entry gap, so that the sheet corner on the left in FIG. 1 first reaches the bending gap 33 and is bent downward at 45 degrees until this sheet corner has reached the exit gap 49 and is gripped by the ball designated 39A in FIG. 1 on the one hand and the conveyor belt 42 on the other hand.
  • the conveying speed of the conveyor belts 42 and 43 in connection with the rolling elements 39 is preferably greater than the conveying speed of the drive roller arrangement 21, 22, with the result that the sheet to be handled, as soon as its corner lying with respect to FIG. 1 between the conveyor belt 2 and the Rolling element or the ball 39A is detected, is now drawn at an increased speed from the input gap 18 into the output gap 49 and changes from the initially prevailing nestling to the inside of the deflection flange 34 to abut against the outer surface of the deflection body 35 and precisely follows its diagonal bend, such that Due to the 45 degree orientation of the deflecting body 35, a conveying direction in the exit gap 49 sets 90 degrees to the feed direction in accordance with the arrow 17, as indicated by the arrow 51 in FIG. 1.
  • both the feed device 11 and the device 10 have a plurality of adjacent sections, the swivel bracket 30 and the swivel axis extending in one piece over these multiple sections and each with sets of drive rollers 21 corresponding to the arrangement shown in FIG. 1 is provided.
  • cover sections 19 assigned to the sections are fastened with deflection flanges 34, the deflection flanges 34 each extending into diagonal recesses of deflection bodies 35 of a guide plate 36 of greater length extending transversely over all sections.
  • On the underside of this guide plate there is a table 41 which extends correspondingly over all sections of the device and on the upper side of which in turn correspondingly elongated conveyor belts 42 and 43 are guided.
  • the object can be achieved of turning and separating a plurality of sheets conveyed next to one another in one plane and separated from one another in the longitudinal direction, and of conveying them in a direction perpendicular to the feed direction, as is shown schematically in FIG. 3 and in a perspective view.
  • the handled sheets follow one another in an overlapping manner in this new conveying direction, the sheet 52d lying on the right with reference to the illustration in FIG is transported at the top, while the sheet 52a drawn on the left in FIG. 3 is removed at the bottom.
  • the separation afterwards presents no difficulties.
  • FIG. 3a shows schematically a device with two sections
  • FIG. 3b shows a device with three sections
  • FIG. 3c shows one with four sections of adjacent units 10 of the type shown in FIG. 1.
  • FIG. 3d shows that feed devices 11 from one side Can supply chain of adjacent units 10 with alternating orientation of the diagonal deflection gap 33.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)
  • Registering Or Overturning Sheets (AREA)

Abstract

Sheet or sets of sheets are turned very rapidly and reliably, especially after the cutting of endless stationery, conveyed further in a different transport direction and separated in that the leading edge of the sheet is taken to a diagonal bending slot via which a corner of a sheet first reaches an outlet slot in which the leading edge of the sheet is taken in a direction perpendicular to the feed direction in a plane lying parallel to the transport plane but at a certain distance therefrom.

Description

Die Erfindung betrifft eine Einrichtung zum Wenden eines Blattes unter gleichzeitiger Änderung der Förderrichtung mit den Merkmalen des Oberbegriffes von Patentanspruch 1. Eine Einrichtung dieser Art ist aus der deutschen Offenlegungsschrift 36 14 103 bekannt. Sie enthält einen Eingangsspalt, einen diagonal verlaufenden Biegespalt und einen Ausgangsspalt, wobei diese Spalte zwischen einer Rollenanordnung einerseits und einer Förderbandanordnung andererseits gebildet sind, derart, daß eine Formation von Blättern in einer Zwangsführung eingespannt schraubengangförmig teilweise gewendet und im Winkel zur Zuführrichtung abgeführt werden kann.The invention relates to a device for turning a sheet while changing the conveying direction with the features of the preamble of claim 1. A device of this type is known from German Offenlegungsschrift 36 14 103. It contains an entry gap, a diagonally running bending gap and an exit gap, these gaps being formed between a roller arrangement on the one hand and a conveyor belt arrangement on the other, such that a formation of sheets clamped in a positive guide can be partially turned in a helical manner and can be discharged at an angle to the feed direction.

Bei der Handhabung und Bearbeitung von Blättern und Formularen, etwa in Postbearbeitungsmaschinen, ist eine hohe Arbeitsgeschwindigkeit erwünscht. Störungen, Papierstaus und dergleichen müssen vermieden werden, da sie einen Stillstand der gesamten Anlage auslösen und zur Zerstörung von Dokumenten führen können, was beispielsweise bei der Bearbeitung von Bankpost verhängnisvoll ist.When handling and processing sheets and forms, for example in mail processing machines, a high working speed is desirable. Disruptions, paper jams and the like must be avoided since they can bring the entire system to a standstill and lead to the destruction of documents, which is fatal, for example, when processing bank mail.

Aufgabe der Erfindung ist es, eine Einrichtung mit den Merkmalen des Oberbegriffes von Patentanspruch 1 so auszugestalten, daß bei hoher Arbeitsgeschwindigkeit ein erhöhtes Maß von Betriebszuverlässigkeit erzielt wird.The object of the invention is to design a device with the features of the preamble of claim 1 so that an increased level of operational reliability is achieved at high working speed.

Diese Aufgabe wird durch die Merkmale des Patentanspruches 1 gelöst. Ein mehrfaches Nebeneinandersetzen von Einrichtungen der hier angegebenen Art ermöglicht es nicht nur, ein einzelnes Blatt zu wenden und mit geänderter Förderrichtung abzuführen, sondern eine Mehrzahl in einer Ebene nebeneinanderliegend angeförderter Blätter oder Formularabschnitte gleichzeitig mit dem Wendevorgang und der Änderung der Förderrichtung zu vereinzelnen, um die einzelnen Blätter oder Formularabschnitte nach dieser Vereinzelung jeweils gesonderten Blattstapeln oder Formularblattsätzen zuzuordnen.This object is solved by the features of claim 1. A multiple juxtaposition of devices of the type specified here not only makes it possible to turn a single sheet and discharge it with a changed conveying direction, but also to separate a plurality of sheets or form sections conveyed side by side in one plane simultaneously with the turning process and the change in the conveying direction in order to separate the Assign individual sheets or form sections to separate sheets or sets of forms after this separation.

Zweckmäßig enthält der Ausgangsspalt einerseits in Abförderrichtung bewegte Abschnitte von umlaufenden Förderbändern und andererseits diesen zugeordnete Gegenhalte-Wälzkörper als Ausgangs-Antriebsmittel, wobei die Wälzkörper bevorzugt von in Käfigen der Leitplatte gehaltenen Kugeln gebildet sind.The exit gap expediently contains, on the one hand, sections of rotating conveyor belts which are moved in the discharge direction and, on the other hand, counter-holding rolling elements assigned to them as the output drive means, the rolling elements preferably being formed by balls held in cages of the guide plate.

Es hat sich als zweckmäßig erwiesen, das zu handhabende Blatt oder die zu handhabenden Blätter zunächst in den Bereich der Treibrollenanordnung im Eingangsspalt zu fördern und vor einer Weitergabe des Blattes oder der Blätter dieses bzw. diese etwa mittels einer Vakuum-Haltevorrichtung gegen die Antriebswirkung der Treibrollenanordnung festzuhalten und dann erst gesteuert freizugeben, wodurch eine präzise Anfangsstellung des jeweiligen Blattes oder der jeweiligen Blätter bei der Einförderung in den Umlenkspalt erreicht wird. Nachfolgend werden Ausführungsbeispiele unter Bezugnahme auf die Zeichnung im einzelnen beschrieben. Es stellen dar:

Fig. 1
eine schematische perspektivische Ansicht einer Einrichtung zum Wenden eines Blattes unter gleichzeitiger Änderung der Förderrichtung, wobei bestimmte tragende Gestellsteile zur Vereinfachung der Darstellung und zur Verbesserung der Übersichtlichkeit weggelassen sind,
Fig. 2
eine Schnittansicht der Einrichtung nach Figur 1 entsprechend der in Figur 1 angedeuteten Schnittebene II-II,
Fig. 3
eine perspektivische schematische Darstellung des Weges mehrerer zur vereinzelnender Blätter in Einrichtungen der hier angegebenen Art und
Fig. 3a bis 3d
schematische Aufsichtszeichnungen von Handhabungswegen der in Einrichtungen der vorliegend angegebenen Art geförderten und gewendeten Blätter oder Formulare, die beispielsweise in einer Postbearbeitungsmaschine auf eine Förderkette aufgegeben werden.
It has proven to be expedient to first convey the sheet or sheets to be handled into the area of the drive roller arrangement in the entry nip and, before the sheet or sheets are passed on, for example by means of a vacuum holding device against the driving action of the drive roller arrangement to hold on and only then to release it in a controlled manner, as a result of which a precise initial position of the respective sheet or sheets is achieved when they are fed into the deflection gap. Exemplary embodiments are described in detail below with reference to the drawing. They represent:
Fig. 1
2 shows a schematic perspective view of a device for turning a sheet while changing the conveying direction, certain supporting frame parts being omitted to simplify the illustration and to improve the clarity,
Fig. 2
2 shows a sectional view of the device according to FIG. 1 corresponding to the sectional plane II-II indicated in FIG. 1,
Fig. 3
a perspective schematic representation of the path of several sheets to be separated in devices of the type specified here and
3a to 3d
schematic supervision drawings of handling routes of the sheets or forms conveyed and turned in devices of the type specified here, which are placed on a conveyor chain, for example in a mail processing machine.

Zunächst seien die Figuren 1 und 2 im einzelnen betrachtet.First, Figures 1 and 2 are considered in detail.

Der hier angegebenen Einrichtung 10 zum Wenden eines Blattes unter gleichzeitiger Änderung der Förderrichtung ist eine Zufördervorrichtung 11 vorgeschaltet, in welcher ein Zuförderspalt 12 zwischen Paaren einander gegenüberstehender Leitstäbe 13 und 14 gebildet ist. Die Leitstäbe 13 können durch quer verlaufende Verbindungsstäbe 15 zusammengehalten sein, während die Leitstäbe 14 in entsprechender Weise durch quer verlaufende Verbindungsstäbe 16 zusammengehalten sind.The device 10 for turning a sheet specified here, while simultaneously changing the conveying direction, is preceded by a feed device 11, in which a feed gap 12 is formed between pairs of opposing guide rods 13 and 14. The guide rods 13 can be held together by transverse connecting rods 15, while the guide rods 14 are held together in a corresponding manner by transverse connecting rods 16.

Ein von der Einrichtung zum Wenden und Ändern der Förderrichtung zu bearbeitendes Blatt wird in den Zuförderspalt 12 in Richtung des Pfeiles 17 eingegeben und hat die Form eines beispielsweise mittels einer Schneidvorrichtung von einem Endlosformular abgetrennten Blattes. Der Zufördervorrichtung 11 vorgeschaltete Einrichtungen fördern ein zu handhabendes Blatt in den Eingangsspalt 12 hinein, bis die vordere Blattkante über den Zuförderspalt 12 hinausragt und in einen Eingangsspalt 18 der Einrichtung zum Wenden und Ändern der Förderrichtung hinein gelangt. In den Eingangsspalt 18 reicht über Ausschnitte von Leitwänden 19 und 20 eine Treibrollenanordnung 21 und 22, welche die Vorderkante des über den Zuförderspalt 12 zugeführten Blattes erfaßt und weiter in den Eingangsspalt 18 hineinzieht.A sheet to be processed by the device for turning and changing the conveying direction is inserted into the feed gap 12 in the direction of the arrow 17 and has the shape of a sheet separated from an endless form, for example by means of a cutting device. Devices upstream of the feed device 11 convey a sheet to be handled into the input gap 12 until the front sheet edge over protrudes the feed gap 12 and enters an input gap 18 of the device for turning and changing the conveying direction. A drive roller arrangement 21 and 22, which detects the front edge of the sheet fed in via the feed gap 12 and extends further into the input gap 18, extends into the input gap 18 via cutouts from guide walls 19 and 20.

Bevor jedoch das zu handhabende Blatt von der Treibrollenanordnung 21 und 22 vollständig in den Eingangsspalt 18 hineingezogen wird, blockiert eine Vakuum-Haltevorrichtung 23 die weitere Blattbewegung, wobei die unteren, nicht mit einem Reibbelag versehenen, mittels eines Motors 24 angetriebenen Treibrollen 22 der Treibrollenanordnung unter dem zu fördernden Blatt durchlaufen, ohne daß die Haltekraft der Vakuum-Haltevorrichtung 23 überwunden wird. Die Vakuum-Haltevorrichtung 23 ist bei dem hier gezeigten Ausführungsbeispiel durch in Vakuum-Halteöffnungen der Leitstäbe 14 mündende Kanäle 25, ein Steuerventil 26 und eine Vakuumquelle 27 verwirklicht. Die jeweilige Blattstellung, in welcher die Vakuum-Haltevorrichtung 23 eingeschaltet oder wirkungslos geschaltet wird, kann mittels eines Stellungsmelders 28 in Gestalt einer Fotozelle und einer Steuereinrichtung 29 bestimmt werden.However, before the sheet to be handled is completely drawn into the input gap 18 by the drive roller assembly 21 and 22, a vacuum holding device 23 blocks further sheet movement, the lower drive rollers 22, which are not provided with a friction lining and driven by a motor 24, under the drive roller assembly pass through the sheet to be conveyed without overcoming the holding force of the vacuum holding device 23. In the exemplary embodiment shown here, the vacuum holding device 23 is realized by channels 25 opening into vacuum holding openings of the guide rods 14, a control valve 26 and a vacuum source 27. The respective sheet position in which the vacuum holding device 23 is switched on or ineffective can be determined by means of a position indicator 28 in the form of a photocell and a control device 29.

Die Leitwände 19 und 20 konvergieren in der aus Figur 2 ersichtlichen Weise von der Eingangsseite aus zu dem Eingangsspalt 18 hin, wobei die obere Leitwand 19 an einem Schwenkbügel 30 befestigt ist, welcher um eine Schwenkachse 31, die in Lagerböcken 32 gelagert ist, hochgeschwenkt werden kann, um die obere Leitwand 19 zusammen mit den ebenfalls am Schwenkbügel 30 gelagerten und gehalterten Rollen 21 der Treibrollenanordnung von der unteren Leitwand 20 und der unteren Anordnung von Treibrollen 22 abzuheben und den Eingangsspalt 18 zugänglich zu machen. Es sei hier noch angemerkt, daß die Rollen 21 der Treibrollenanordnung freilaufend gelagert sind.The guide walls 19 and 20 converge in the manner shown in FIG. 2 from the input side to the input gap 18, the upper guide wall 19 being fastened to a swivel bracket 30 which is swiveled up about a swivel axis 31 which is mounted in bearing blocks 32 can to the upper guide wall 19 together with the rollers 21 of the drive roller assembly, which are also mounted and held on the swivel bracket 30, from the lower guide wall 20 and the lift off lower arrangement of drive rollers 22 and to make the entrance gap 18 accessible. It should also be noted here that the rollers 21 of the drive roller arrangement are freely supported.

Aus den Figuren 1 und 2 ist erkennbar, daß die obere Leitwand 19 und die untere Leitwand 20 in Förderrichtung der Treibrollenanordnung bis zu einem diagonal verlaufenden Biegespalt 33 reichen, dessen Krümmungsachse im wesentlichen parallel zur Ebene des Eingangsspaltes und damit zur Blattebene des zu handhabenden Blattes und im Winkel von 45 Grad zur führenden Blattkante orientiert ist, wobei der Biegespalt 33 einerseits von einem diagonalen, gekrümmten Umlenkflansch 34 der oberen Leitwand und andererseits von einem diesem Umlenkflansch gegenüberstehenden, diagonalen, im wesentlichen zylindrischen Umlenkkörper begrenzt ist.It can be seen from FIGS. 1 and 2 that the upper guide wall 19 and the lower guide wall 20 extend in the conveying direction of the drive roller arrangement up to a diagonally running bending gap 33, the axis of curvature of which is essentially parallel to the plane of the entrance gap and thus to the plane of the sheet to be handled and is oriented at an angle of 45 degrees to the leading sheet edge, the bending gap 33 being limited on the one hand by a diagonal, curved deflection flange 34 of the upper guide wall and on the other hand by a diagonal, essentially cylindrical deflection body opposite this deflection flange.

Die als vergleichsweise starre Deckplatte ausgebildete obere Leitwand 19 reicht somit in eine unter 45 Grad zur Förderrichtung der Treibrollenanordnung orientierte diagonale Ausnehmung der unteren Leitwand 20 hinein, wobei die diagonale vordere Kante der unteren Leitwand 20 von dem Umlenkkörper 35 abgeschlossen ist. Die untere Leitwand 20 bildet den oberen Abschluß einer Leitplatte 36, deren mittlere Schicht 37 beispielsweise aus Polytetrafluoräthylen besteht und mit Käfigausnehmungen 38 versehen ist, in denen Wälzkörper oder Kugeln 39 untergebracht sind. Diese Kugeln sind in den Käfigausnehmungen 38 durch eine untere Abschlußwand 40 der Leitplatte 36 gehalten, wobei die untere Abschlußwand 40 mit Ausnehmungen ausreichenden Durchmessers versehen ist, die auf die Käfigausnehmungen 38 ausgerichtet sind, derart, daß die Wälzkörper 39 durch die Ausnehmungen der unteren Abschlußwand nach unten vorstehen. Aus Figur 2 ist auch zu erkennen, daß die mittlere Schicht 37 der Leitplatte 36 mit Ausnehmungen derart versehen ist, daß darin die Treibrollen 22 der Treibrollenanordnung Aufnahme finden können, welche durch die Ausschnitte der unteren Leitwand 20 nach oben in den Eingangsspalt 18 reichen.The upper guide wall 19 designed as a comparatively rigid cover plate thus extends into a diagonal recess of the lower guide wall 20 oriented at 45 degrees to the conveying direction of the drive roller arrangement, the diagonal front edge of the lower guide wall 20 being closed off by the deflecting body 35. The lower guide wall 20 forms the upper end of a guide plate 36, the middle layer 37 of which consists for example of polytetrafluoroethylene and is provided with cage recesses 38 in which rolling elements or balls 39 are accommodated. These balls are held in the cage recesses 38 by a lower end wall 40 of the guide plate 36, the lower end wall 40 being provided with recesses of sufficient diameter which are aligned with the cage recesses 38 such that the rolling elements 39 pass through the recesses of the lower end wall protrude below. It can also be seen from FIG. 2 that the middle layer 37 of the guide plate 36 is provided with recesses in such a way that the drive rollers 22 of the drive roller arrangement can be accommodated therein, which reach up through the cutouts of the lower guide wall 20 into the input gap 18.

Unterhalb der Leitplatte 36 befindet sich ein Tisch 41, über welchen jeweils das Obertrum von Förderbändern 42 und 43 geführt ist. Diese Förderbänder sind über am Anfang und am Ende des Tisches 41 angeordnete und gelagerte Rollenpaare 44 und 45 bzw. 46 und 47 gelegt, wobei die Rollen 44 und 46 von einem Antriebsmotor 48 in Umdrehung versetzt werden.Below the guide plate 36 is a table 41, over which the upper run of conveyor belts 42 and 43 is guided. These conveyor belts are placed over pairs of rollers 44 and 45 or 46 and 47 arranged and supported at the beginning and at the end of the table 41, the rollers 44 and 46 being set in rotation by a drive motor 48.

Die untere Abschlußwand der Leitplatte 36 einerseits und der Tisch 41 andererseits begrenzen einen Ausgangsspalt 49, der in einer Ebene liegt, die parallel zur Ebene des Eingangsspaltes 18 ausgerichtet ist und von dieser Ebene einen Abstand im wesentlichen entsprechend der Dicke der Leitplatte 36 hat. In dem Ausgangsspalt 49 sind als Fördereinrichtungen einerseits jeweils die oberen Abschnitte oder die oberen Trümmer der Förderbänder 42 und 43 und andererseits jeweils auf die Förderbänder ausgerichtete Reihen von Wälzkörpern 39 wirksam. Diese Zuordnung ist aus den Figuren 1 und 2 für den Fachmann ohne weiteres zu erkennen. Auf der Ausgangsseite der Förderbänder 42 und 43 befindet sich noch ein den Rollen 45 und 47 gegenüberstehendes, in Figur 1 strichpunktiert angedeutetes Laufrollenpaar 50. Zwischen den Laufrollen des Laufrollenpaares 50 kann, was in Figur 1 nicht dargestellt ist, eine mitlaufende Scheibe angeordnet sein, die im Durchmesser so bemessen ist, daß sie etwas in das Profil des Ausgangsspaltes 49 hineinragt und daher dem abgeförderten Blatt eine leichte Querwölbung vermittelt, wodurch die Stabilität des abgeförderten Blattes in wünschenswerter Weise erhöht wird.The lower end wall of the guide plate 36 on the one hand and the table 41 on the other hand delimit an exit gap 49 which lies in a plane which is aligned parallel to the plane of the entry gap 18 and is at a distance from this plane essentially corresponding to the thickness of the guide plate 36. In the output gap 49, the upper sections or the upper debris of the conveyor belts 42 and 43 and, on the other hand, rows of rolling elements 39 each aligned with the conveyor belts act as conveying devices. This assignment is readily apparent to those skilled in the art from FIGS. 1 and 2. On the output side of the conveyor belts 42 and 43 there is also a pair of rollers 50 opposite the rollers 45 and 47, indicated by dash-dotted lines in FIG. 1. Between the rollers of the pair of rollers 50, which is not shown in FIG is dimensioned in such a way that it protrudes somewhat into the profile of the exit gap 49 and therefore imparts a slight transverse curvature to the sheet being removed, as a result of which the stability of the sheet being removed is increased in a desirable manner.

Im Betrieb wird ein etwa von einem Endlosformular abgetrenntes Blatt aus der Trennvorrichtung in Richtung des Pfeiles 17 in die Zufördervorrichtung 11 eingegeben und so weit vorgeschoben, daß die Vorderkante des Blattes schließlich von der Treibrollenanordnung im Eingangsspalt 18 erfaßt wird und in dem Eingangsspalt 18 weiter vorgeschoben wird. Dabei überläuft schließlich die hintere Blattkante den Fühler 28, welcher ein Signal erzeugt und die Steuereinrichtung 29 dazu veranlaßt, die Vakuum-Halteeinrichtung 23 durch Öffnen des Ventiles 26 in Betrieb zu setzen, so daß nunmehr das Blatt durch die Vakuum-Saugöffnungen am Außenende der Kanäle 25 festgehalten wird und die Treibrollen 22 zunächst leer unter dem im Eingangsspalt 18 befindlichen Teil des zu handhabenden Blattes durchlaufen.In operation, a sheet that has been severed from an endless form is removed from the severing device in the direction of arrow 17 in the feed device 11 entered and advanced so far that the leading edge of the sheet is finally gripped by the drive roller arrangement in the input gap 18 and is further advanced in the input gap 18. Finally, the rear edge of the sheet overflows the sensor 28, which generates a signal and causes the control device 29 to put the vacuum holding device 23 into operation by opening the valve 26, so that the sheet now passes through the vacuum suction openings at the outer end of the channels 25 is held and the drive rollers 22 first run empty under the part of the sheet to be handled located in the entry gap 18.

Wird dann das Blatt durch Schließen des Ventiles 26 und Abschaltung der Vakuum-Haltevorrichtung 23 wieder freigegeben, so schiebt die Treibrollenanordnung 21, 22 das zu handhabende Blatt weiter in dem Eingangsspalt vorwärts, so daß zunächst die in Figur 1 links liegende Blattecke den Biegespalt 33 erreicht und unter 45 Grad nach unten gekrümmt wird, bis diese Blattecke den Ausgangsspalt 49 erreicht hat und von der in Figur 1 mit 39A bezeichneten Kugel einerseits und dem Förderband 42 andererseits erfaßt wird.If the sheet is then released again by closing the valve 26 and switching off the vacuum holding device 23, the drive roller arrangement 21, 22 pushes the sheet to be handled further in the entry gap, so that the sheet corner on the left in FIG. 1 first reaches the bending gap 33 and is bent downward at 45 degrees until this sheet corner has reached the exit gap 49 and is gripped by the ball designated 39A in FIG. 1 on the one hand and the conveyor belt 42 on the other hand.

Die Fördergeschwindigkeit der Förderbänder 42 und 43 in Verbindung mit den Wälzkörpern 39 ist vorzugsweise größer als die Fördergeschwindigkeit der Treibrollenanordnung 21, 22, mit der Folge, daß das zu handhabende Blatt, sobald seine mit Bezug auf Figur 1 rechtsliegende Ecke zwischen dem Förderband 2 und dem Wälzkörper oder der Kugel 39A erfaßt wird, nun mit erhöhter Geschwindigkeit aus dem Eingangsspalt 18 in den Ausgangsspalt 49 gezogen wird und von der zunächst vorherrschenden Anschmiegung an die Innenseite des Umlenkflansches 34 zur Anlage an die Außenfläche des Umlenkkörpers 35 wechselt und präzise dessen diagonaler Biegung folgt, derart, daß sich aufgrund der 45 Grad-Orientierung des Umlenkkörpers 35 eine Förderrichtung im Ausgangsspalt 49 90 Grad zu der Zuförderrichtung entsprechend des Pfeiles 17 einstellt, wie durch den Pfeil 51 in Figur 1 angedeutet ist.The conveying speed of the conveyor belts 42 and 43 in connection with the rolling elements 39 is preferably greater than the conveying speed of the drive roller arrangement 21, 22, with the result that the sheet to be handled, as soon as its corner lying with respect to FIG. 1 between the conveyor belt 2 and the Rolling element or the ball 39A is detected, is now drawn at an increased speed from the input gap 18 into the output gap 49 and changes from the initially prevailing nestling to the inside of the deflection flange 34 to abut against the outer surface of the deflection body 35 and precisely follows its diagonal bend, such that Due to the 45 degree orientation of the deflecting body 35, a conveying direction in the exit gap 49 sets 90 degrees to the feed direction in accordance with the arrow 17, as indicated by the arrow 51 in FIG. 1.

Bei praktischen Ausführungsformen der hier angegebenen Einrichtung besitzt sowohl die Zufördervorrichtung 11 als auch die Einrichtung 10 mehrere nebeneinanderliegende Abschnitte, wobei der Schwenkbügel 30 und die Schwenkachse sich über diese mehreren Abschnitte hinweg einstückig erstreckt und jeweils mit Sätzen von Treibrollen 21 entsprechend der in Figur 1 gezeigten Anordnung versehen ist. An dem sich über mehrere Abschnitte erstreckenden Schwenkbügel 30 sind den Abschnitten jeweils zugeordnete Deckplattenabschnitte 19 mit Umlenkflanschen 34 befestigt, wobei die Umlenkflanschen 34 jeweils in mit Umlenkkörpern 35 versehene diagonale Ausnehmungen einer sich über sämtliche Abschnitte quer erstreckenden Leitplatte 36 größerer Länge hineinreichen. Auf der Unterseite dieser Leitplatte befindet sich ein entsprechend sich über sämtliche Abschnitte der Einrichtung erstreckender Tisch 41, über dessen Oberseite wiederum entsprechend verlängerte Förderbänder 42 und 43 geführt sind.In practical embodiments of the device specified here, both the feed device 11 and the device 10 have a plurality of adjacent sections, the swivel bracket 30 and the swivel axis extending in one piece over these multiple sections and each with sets of drive rollers 21 corresponding to the arrangement shown in FIG. 1 is provided. On the swivel bracket 30, which extends over several sections, cover sections 19 assigned to the sections are fastened with deflection flanges 34, the deflection flanges 34 each extending into diagonal recesses of deflection bodies 35 of a guide plate 36 of greater length extending transversely over all sections. On the underside of this guide plate there is a table 41 which extends correspondingly over all sections of the device and on the upper side of which in turn correspondingly elongated conveyor belts 42 and 43 are guided.

Mit einer derartigen Einrichtung läßt sich die Aufgabe lösen, mehrere nebeneinander in einer Ebene angeförderte und in Längsrichtung voneinander abgetrennte Blätter zu wenden und zu vereinzelnen sowie in einer zur Zuförderrichtung senkrechten Richtung abzufördern, wie dies in Figur 3 schematisch und in perspektivischer Darstellung gezeigt ist. Nach dem Zufördern und Wenden sowie dem Wechsel der Förderrichtung folgen die gehandhabten Blätter in dieser neuen Förderrichtung einander überlappend, wobei das mit Bezug auf die Darstellung von Figur 3 rechtsliegende Blatt 52d dann von der Abförderrichtung zuoberst transportiert wird, während das in Figur 3 linksliegend gezeichnete Blatt 52a zuunterst abgefördert wird. Die Vereinzelnung bereitet danach keine Schwierigkeiten.With such a device, the object can be achieved of turning and separating a plurality of sheets conveyed next to one another in one plane and separated from one another in the longitudinal direction, and of conveying them in a direction perpendicular to the feed direction, as is shown schematically in FIG. 3 and in a perspective view. After the feeding and turning as well as the changing of the conveying direction, the handled sheets follow one another in an overlapping manner in this new conveying direction, the sheet 52d lying on the right with reference to the illustration in FIG is transported at the top, while the sheet 52a drawn on the left in FIG. 3 is removed at the bottom. The separation afterwards presents no difficulties.

Figur 3a zeigt schematisch in Aufsicht eine Einrichtung mit zwei Abschnitten, Figur 3b eine solche mit drei Abschnitten und Figur 3c eine solche mit vier Abschnitten nebeneinanderliegender Einheiten 10 der in Figur 1 gezeigten Art. Figur 3d schließlich zeigt, daß Zufördervorrichtungen 11 von beiden Seiten her eine Kette nebeneinanderliegender Einheiten 10 mit jeweils wechselnder Orientierung des diagonalen Umlenkspaltes 33 versorgen können.FIG. 3a shows schematically a device with two sections, FIG. 3b shows a device with three sections and FIG. 3c shows one with four sections of adjacent units 10 of the type shown in FIG. 1. Finally, FIG. 3d shows that feed devices 11 from one side Can supply chain of adjacent units 10 with alternating orientation of the diagonal deflection gap 33.

Schließlich sei noch angemerkt, daß zur sicheren Führung und Umlenkung des zu handhabenden Blattes oder der zu handhabenden Blätter im Umlenkspalt 33 und im Ausgangsspalt 49 auch mehr als zwei Förderbänder nach der Art der Förderbänder 42 und 43 mit zugeordneten Reihen von Wälzkörpern 39 vorgesehen werden können.Finally, it should also be noted that for safe guidance and deflection of the sheet or sheets to be handled in the deflection gap 33 and in the exit gap 49, more than two conveyor belts of the type of the conveyor belts 42 and 43 with associated rows of rolling elements 39 can also be provided.

Claims (7)

  1. A device for turning a sheet over, with simultaneous change in the direction of transport, wherein the sheet is fed by input drive means (21, 22) in an input gap (18), which tuns into a diagonally extending bending gap (33), whose axis of curvature is orientated substantially parallel to the plane of the sheet and at an angle of preferably 45° to the travelling edge of the sheet and which opens into an output gap (49), in which output drive means (42, 43, 39) are provided at least to engage the sheet corner first appearing in the output gap (49) as the sheet is fed through the input gap (18), wherein the output gap has a plane which is substantially parallel to that of the input gap (18) but spaced therefrom, characterized in that the input gap (18) in which the sheet is fed by means of a drive roller arrangement (21, 22) forming input drive means is formed between a cover plate (19) and a guide plate (36), of which the cover plate (19) comprises a diagonal, curved deflecting flange (34) reaching into a diagonal opening in the guide plate (36) to form the bending gap (33), and of which the guide plate (36) comprises a substantially cylindrical diagonal deflecting body (35) opposite the deflecting flange, and wherein finally the output gap (49) and the output drive means (42, 43, 39) are provided on the side of the guide plate (36) facing away from the cover plate (19).
  2. A device according to claim 1, characterized in that both the cover plate (19) and the guide plate (36) have cut-outs at the beginning of the input gap (18), through which opposed feed rollers of the drive roller arrangement (21, 22) extend into the input gap (18).
  3. A device according to claim 1 or 2, characterized in that the output gap (49) comprises sections of conveyor belts (42, 43) on one side, moved in the out-feed direction, and counter rolling bodies (39) associated therewith on the other side, as the output drive means.
  4. A device according to any of claims 1 to 3, characterized in that an in-feed device (11) precedes the input gap (18) and has a retaining device (23) which, with the drive roller arrangement (21, 22) in operation, controllably (29) arrests the sheet to be transported or releases the same.
  5. A device according to any of claims 1 to 4, characterized in that the cover plate (19) together with a part of the drive roller arrangement (21, 22) containing idle rollers is pivotally mounted (31, 32) relative to the guide plate (36).
  6. A device according to any of claims 1 to 5, characterized in that cage openings (38) are provided in the guide plate (36) and balls are fitted therein in rows as counter rolling bodies (39), which are opposed to conveyor belts (42, 43) across the output gap (49).
  7. A device according to any of claims 1 to 6, characterized in that the transport speed in the output gap (49) is set higher than in the input gap (18).
EP92908174A 1991-07-04 1992-04-13 Device for turning a sheet with a simultaneous change in the direction of transport Expired - Lifetime EP0559846B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE4122214 1991-07-04
DE4122214A DE4122214A1 (en) 1991-07-04 1991-07-04 DEVICE FOR TURNING A SHEET UNDER SIMULTANEOUSLY CHANGING THE CONVEYOR
PCT/EP1992/000829 WO1993001115A1 (en) 1991-07-04 1992-04-13 Device for turning a sheet with a simultaneous change in the direction of transport

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EP0559846A1 EP0559846A1 (en) 1993-09-15
EP0559846B1 true EP0559846B1 (en) 1996-07-17
EP0559846B2 EP0559846B2 (en) 2001-03-21

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EP (1) EP0559846B2 (en)
DE (2) DE4122214A1 (en)
WO (1) WO1993001115A1 (en)

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Also Published As

Publication number Publication date
EP0559846B2 (en) 2001-03-21
USRE38867E1 (en) 2005-11-08
WO1993001115A1 (en) 1993-01-21
US5362039A (en) 1994-11-08
DE4122214A1 (en) 1993-01-14
DE59206783D1 (en) 1996-08-22
EP0559846A1 (en) 1993-09-15

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