EP0454011B1 - Device for conveying a stream, especially a scaled stream of sheets - Google Patents
Device for conveying a stream, especially a scaled stream of sheets Download PDFInfo
- Publication number
- EP0454011B1 EP0454011B1 EP91106410A EP91106410A EP0454011B1 EP 0454011 B1 EP0454011 B1 EP 0454011B1 EP 91106410 A EP91106410 A EP 91106410A EP 91106410 A EP91106410 A EP 91106410A EP 0454011 B1 EP0454011 B1 EP 0454011B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- conveyor belts
- conveying table
- suction
- roller
- conveying
- 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
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H11/00—Feed tables
- B65H11/002—Feed tables incorporating transport belts
- B65H11/005—Suction belts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H5/00—Feeding articles separated from piles; Feeding articles to machines
- B65H5/24—Feeding articles in overlapping streams, i.e. by separation of articles from a pile
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/30—Suction means
- B65H2406/32—Suction belts
- B65H2406/321—Suction belts integral in feed table
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
- B65H2406/00—Means using fluid
- B65H2406/30—Suction means
- B65H2406/32—Suction belts
- B65H2406/322—Suction distributing means
- B65H2406/3223—Suction distributing means details of the openings in the belt, e.g. shape, distribution
Definitions
- the invention relates to a device for conveying an in particular scaled stream of sheets to a sheet processing machine.
- Such a device is e.g. B. known from the publication "Xerox Disclosure Journal” Volume 4 Number 2 March / April 1979.
- This device consists of a single so-called suction box which can be subjected to negative pressure.
- the top of the suction box has holes through which endless perforated conveyor belts are guided and subjected to negative pressure.
- An axial fan installed at the bottom of the suction box creates the necessary negative pressure in the suction box.
- An adjustable flap in the suction box enables the suction box to be divided into two areas of different pressure levels one behind the other in the transport direction.
- DE-OS 31 38 481 also shows a single suction box with built-in axial fan.
- the pressure level cannot be changed in the transport direction.
- the problem arises in particular when the first sheet of a sheet stream is sucked in that the suction openings of the entire transport path are not covered, so that atmospheric pressure reaches the suction box through these uncovered suction openings that an almost complete pressure compensation is generated there.
- the suction power is therefore almost zero and is no longer strong enough to take over a first sheet of a sheet stream from the sheet stack in a secure position.
- the suction air of a conveyor table is set with just one suction box, large or small, in any case there is a disadvantage for the sheet transport from the sheet stack to the sheet processing machine.
- the conveyor belts arranged next to one another in parallel have no additional sealing means, so that a vacuum is generated in a space between two adjacent conveyor belts, which sucks a transported sheet not only onto the conveyor belts but also onto the conveyor table. This creates an undesirable braking and deformation effect between the sheet and conveyor table and can transport problems such. B. cause skewing of the bow.
- DE-OS 38 38 078 describes a device for conveying an in particular scaled stream of sheets to a sheet processing machine, in which two suction boxes which can be acted upon differently by suction air are arranged one behind the other in the transport direction.
- the invention has for its object to provide a device for conveying a particularly scaled stream of sheets in which the conveyed sheets are stretched transversely to the direction of transport.
- the advantage of the invention is a safe sheet transport from the sheet stack to the front marks even at high speeds.
- two suction boxes arranged next to one another are arranged at least in the contact area, so that the suction belts can be regulated separately in pressure level.
- a sheet can already be pre-aligned on the belts during transport to the left or right in the direction of the side pull marks or at the provided side stops.
- means are provided in order to regulate the pressure in the various suction chambers sensitively. This enables an extraordinarily good adaptation of the entire transport device to the respective working conditions.
- An area to the side of the conveyor belts is also advantageously provided with compensating holes. These are under atmospheric pressure and prevent a negative pressure from being generated to the side of the conveyor belts which are subjected to negative pressure and which would pull the sheet against a conveyor table surface and brake it. Compensating holes improve the sliding properties of the sheet relative to the surface of the conveyor table and also counteract undesired electrostatic charging of the sheet.
- a conveyor table 1 has two rows of a number of bores 2 arranged one behind the other (for example ⁇ 35 mm) as seen in the transport direction.
- Endless conveyor belts 4 are guided around the conveyor table 1 in the conveying direction 3 so that they slide on a surface 6 of the conveyor table 1.
- the conveyor belts 4 have a perforation 7 consisting of a number of small bores (z. B. ⁇ 8 mm), by means of which they can be brought into register with the bores 2.
- the conveyor belts 4 are guided at the beginning and end of the conveyor table 1 via deflection rollers 8, 9 and below the conveyor table 1 via deflection rollers 11, 12.
- the deflection rollers 11 to 14 are drivably mounted in side frames.
- the deflecting roller 8 has a drive and the deflecting roller 11 has a device (not shown) for adjusting the deflecting roller 11 and thus for tensioning the conveyor belts 4.
- suction boxes 13, 14, 15, 16 are provided in the area of the bores 2, two of which are arranged one behind the other and two next to one another. All suction boxes 13 to 16 are with one common suction source 17 preferably connected to a radial fan. Of course, each individual suction box 13 to 16 can also have its own controllable suction source 17. Other combinations are also possible.
- the side-by-side suction boxes 14, 16 each have a device for regulating the pressure level. In the exemplary embodiment, these are of simple construction as slide valves 18, 19. The entire supply of suction air to the suction boxes 14, 16 can be regulated by means of a throttle valve 20 and can also be switched off if necessary.
- the suction boxes 14, 6 each have on their underside two openings 21, 22; 23, 24 on. These are attached such that the openings 21, 22 are arranged parallel to the openings 23, 24.
- Two sliders 26, 27 are each mounted transversely displaceably in guides 28, 29 to the conveying direction 3.
- the slider 26, 27 exist z. B. from a steel sheet or a plastic plate and each have two openings 31, 32; 33, 34 on.
- the openings 31, 32 are arranged between the openings 21, 23 in a starting position of the slide 26, ie the openings 21, 23 are covered by the slide 26.
- the openings 33, 34 of the slide 27 are seen in a starting position in the conveying direction 3 in the exemplary embodiment in each case to the right of the opening 22; 24 arranged.
- the suction boxes 13 to 16 are closed all around, ie from above by a number of arcs 36 (arc flow) and therefore have the same effect generated by the vacuum source 17 Pressure level.
- the slide 27 controls the pressure level of the suction boxes 14, 16, in which the openings 33, 34 of the slide 27 are more or less aligned with the openings 22, 24 of the suction boxes 14, 16. These measures make the suction boxes 14, 16 supplied more or less atmospheric pressure.
- the perforated conveyor belts 4 are guided in such a way that they diverge on the conveyor table 1 in the conveying direction 3, i. H. a distance a of the perforated conveyor belts 4 is smaller at the beginning of the conveyor table 1 than a distance b at the end of the conveyor table 1.
- a conveyor length of z. B. 1,000 mm is the deviation of each perforated conveyor belt 4 from the conveying direction 3 z. B. 0 to 15 mm.
- the driven deflecting roller 8 hereinafter referred to as the drive roller, each has a frustoconical shaft shoulder 36, 37 for guiding the perforated conveyor belts 4.
- the shaft shoulders 36, 37 are arranged at a distance a such that the larger diameter of the truncated cone is arranged facing the ends of the drive roller 8.
- the deflecting roller 9 also has corresponding truncated cone shaft shoulders 35, 40 spaced apart from one another at a distance b, which are arranged such that the smaller diameter of the truncated cone is arranged facing the ends of the deflecting roller 9.
- the speed of the conveyor belts can be regulated in order to correct the inclination of the sheets 36.
- the drive roller 8 and the deflection roller 9 are axially displaceably mounted together and the frustoconical shaft shoulders 35, 36, 37, 40 are made wider than the conveyor belts 4.
- the driving diameter or circumference is smaller or larger and thus the speed of the conveyor belts 4 proportional to the circumference of the truncated cones 36, 37 is also smaller or larger.
- the spring-loaded tension roller 11 has lateral guides 53 (for example flanged wheels) so that the conveyor belts 4 cannot drift sideways.
- the deflection roller 9 can also be designed as a continuous roller in the case of very small differences between the distances a, b.
- the deviation of the perforated conveyor belts 4 from the conveying direction 3 is then only determined by the slope of the truncated cone shaft shoulders 36, 37.
- adjustment means are provided to adjust the deviation of the perforated conveyor belts 4 from the conveying direction.
- the drive roller 8 has 4 spherical shaft shoulders 38, 39 (barrel shape) for guiding the conveyor belts.
- the deflecting roller 9 is replaced by two individual rollers 41, 42, the base body of which is also of a spherical shape (Barrel shape).
- the drum rollers 41, 42 are each rotatably mounted in a horizontally pivotable frame 43, 44.
- To the frame 43; 44 is the end of a threaded rod 46; 47 articulated.
- the threaded rods 46, 47 are rotatably mounted in threaded holes 48, 49 in the side frame.
- a handwheel 51, 52 is provided for easy handling. Of course, the handwheel 51; 52 can also be replaced by actuators in the course of automation.
- two rows of compensating bores 61, 62 are provided, which are arranged parallel to the bores 2.
- the holes 61, 62 are in connection with atmospheric pressure on the underside of the conveyor table 1 and thereby avoid that a negative pressure is built up between the conveyor belts 4, which could exert an undesirable braking force on the sheet.
- the compensation holes 61, 62 can also be connected to a compressed air source (for example on the pressure side of the blower 17) to improve the sliding properties of the sheets 36 on the conveyor table.
- the compensating bores 61, 62 can also be additionally arranged on an outside of the conveyor belts 4 in the conveyor table 1.
- the sheets 36 are fed to the conveying table 1 under a shingled pattern.
- the suction boxes 13, 15 acted upon with a strong vacuum cause the sheets 36 to be pulled securely onto the perforated conveyor belts 4 and held there.
- the sheets 36 are transported by means of the conveyor belts 4 to the intended front marks 58 and are simultaneously tightened by the conveyor belts 4 running apart.
- the foremost sheet 36 only covers the conveyor table 1 in an area in which the suction boxes 14, 16, which can be subjected to a lower vacuum, are arranged.
- side drawing marks (not shown) can laterally align the sheet 36 stretched out on the front marks 58 with little force.
- the suction boxes 14, 16 are subjected to different negative pressures. Regulation takes place by means of the slide 26 described above. B. seen in the conveying direction 3, left-hand conveyor belt 4 through the suction box 14 with less suction than the right-hand conveyor belt 4 from the suction box 16, then all sheets are pulled to the right during transport on the conveyor table.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)
Description
Die Erfindung betrifft eine Vorrichtung zum Fördern eines insbesondere geschuppten Stroms von Bogen zu einer bogenverarbeitenden Maschine.The invention relates to a device for conveying an in particular scaled stream of sheets to a sheet processing machine.
Eine derartige Vorrichtung ist z. B. durch die Veröffentlichung "Xerox Disclosure Journal" Volume 4 Number 2 March/April 1979 bekannt. Diese Vorrichtung besteht aus einem einzigen mit Unterdruck beaufschlagbaren sogenannten Saugkasten. Der Saugkasten weist in seiner Oberseite Bohrungen auf über welche endlose perforierte Transportbänder geführt und mit Unterdruck beaufschlagt werden. Ein am Grund des Saugkastens eingebautes Axialgebläse erzeugt den notwendigen Unterdruck im Saugkasten. Eine im Saugkasten verstellbar angeordnete Klappe ermöglicht die Teilung des Saugkastens in zwei in Transportrichtung hintereinanderliegende Bereiche unterschiedlichen Druckniveaus.Such a device is e.g. B. known from the publication "Xerox Disclosure Journal"
Die DE-OS 31 38 481 zeigt ebenfalls einen einzigen Saugkasten mit eingebautem Axialgebläse. Gegenüber der vorstehend beschriebenen Veröffentlichung weist sie jedoch den Nachteil auf, daß das Druckniveau in Transportrichtung gesehen nicht veränderbar ist. Dies bedeutet, daß die mittels der endlosen Bänder transportierten Bogen über den gesamten Transportweg mit konstanter Kraft an die Bänder angesaugt werden. Hierbei entsteht insbesondere beim Ansaugen des ersten Bogens eines Bogenstroms das Problem, daß die Saugöffnungen der gesamten Transportstrecke nicht abgedeckt sind, so daß durch diese nicht abgedeckten Saugöffnungen derart viel atmosphärischer Druck in den Saugkasten gelangt, daß dort ein nahezu vollständiger Druckausgleich erzeugt wird. Die Saugkraft wird daher nahezu gleich null und ist nicht mehr stark genug einen ersten Bogen eines Bogenstromes lagesicher vom Bogenstapel zu übernehmen. Eine Saugkraft, die ausreichen würde, um einen Bogen lagesicher von einem vorgeschalteten Bogenstapeltisch zu übernehmen, kann jedoch insbesondere bei dünnem Papier zu groß sein, um ein Ausrichten der Bögen im Bereich vorgesehener Vordermarken zuzulassen. Wie auch die Saugluft eines Fördertisches mit nur einem Saugkasten eingestellt wird, groß oder klein, in jedem Fall ergibt sich ein Nachteil für den Bogentransport vom Bogenstapel zur bogenverarbeitenden Maschine. Die parallel nebeneinander angeordneten Transportbänder weisen keine zusätzlichen Dichtmittel auf, so daß in einem Raum zwischen jeweils zwei benachbarten Transportbändern ein Vakuum erzeugt wird, welches einen transportierten Bogen nicht nur an die Transportbänder, sondern auch an den Fördertisch ansaugt. Hierdurch entsteht ein unerwünschter Brems- und Deformationseffekt zwischen Bogen und Fördertisch und kann Transportprobleme wie z. B. Schrägstellen der Bogen hervorrufen.DE-OS 31 38 481 also shows a single suction box with built-in axial fan. Compared to the publication described above, however, it has the disadvantage that the pressure level cannot be changed in the transport direction. This means that the sheets transported by means of the endless belts are applied to the belts with constant force over the entire transport path be sucked in. The problem arises in particular when the first sheet of a sheet stream is sucked in that the suction openings of the entire transport path are not covered, so that atmospheric pressure reaches the suction box through these uncovered suction openings that an almost complete pressure compensation is generated there. The suction power is therefore almost zero and is no longer strong enough to take over a first sheet of a sheet stream from the sheet stack in a secure position. A suction force that would be sufficient to take over a sheet securely from an upstream sheet stacking table, however, can be too great, particularly in the case of thin paper, in order to allow the sheets to be aligned in the region of the front marks provided. Just as the suction air of a conveyor table is set with just one suction box, large or small, in any case there is a disadvantage for the sheet transport from the sheet stack to the sheet processing machine. The conveyor belts arranged next to one another in parallel have no additional sealing means, so that a vacuum is generated in a space between two adjacent conveyor belts, which sucks a transported sheet not only onto the conveyor belts but also onto the conveyor table. This creates an undesirable braking and deformation effect between the sheet and conveyor table and can transport problems such. B. cause skewing of the bow.
Darüberhinaus besteht bei den Gegenständen der vorstehend genannten Veröffentlichungen der Nachteil, daß ein Axialgebläse nicht ausreicht, um ein erforderlich hohes Druckniveau in einem Anfangsbereich der Transportstrecke aufzubauen, welches stark genug ist, einen von einem vorgeschalteten Bogenstapel kommenden Bogen lagesicher abzuziehen und zu halten.In addition, the objects of the publications mentioned above have the disadvantage that an axial blower is not sufficient to achieve a required high pressure level in an initial region of the transport route build up, which is strong enough to pull and hold a sheet coming from an upstream sheet stack in a secure position.
In der DE-OS 38 38 078 ist eine Vorrichtung zum Fördern eines insbesondere geschuppten Stroms von Bogen zu einer Bogen verarbeitenden Maschine beschrieben, bei der zwei unterschiedlich mit Saugluft beaufschlagbare Saugkästen in Transportrichtung hintereinander angeordnet sind.DE-OS 38 38 078 describes a device for conveying an in particular scaled stream of sheets to a sheet processing machine, in which two suction boxes which can be acted upon differently by suction air are arranged one behind the other in the transport direction.
Allen vorstehend genannten Vorrichtungen liegt jedoch der Nachteil zugrunde, daß die zum Transport vorgesehenen endlos umlaufenden Bänder dazu neigen fertigungsbedingt (unsachgemäße Klebung, einseitige Dehnung) in ihrem Abstand zueinander leicht zu variieren. Hierdurch entsteht insbesondere bei leicht zusammenlaufenden Bändern der Nachteil, daß ein auf den Bändern zum Transport angesaugter Bogen quer zur Transportrichtung Falten aufweist, die einen registergerechten Weitertransport erschweren bzw. verhindern.However, all of the above-mentioned devices have the disadvantage that the endless belts provided for transport tend to vary slightly in their spacing from one another due to production reasons (improper adhesive bonding, one-sided stretching). This has the disadvantage, in particular in the case of slightly converging belts, that a sheet sucked in on the belts for transport has folds transversely to the transport direction, which complicate or prevent further transport in accordance with the register.
Der Erfindung liegt die Aufgabe zugrunde eine Vorrichtung zum Fördern eines insbesondere geschuppten Stroms von Bogen zu schaffen bei dem die geförderten Bogen quer zur Transportrichtung gestreckt werden.The invention has for its object to provide a device for conveying a particularly scaled stream of sheets in which the conveyed sheets are stretched transversely to the direction of transport.
Die Aufgabe wird erfindungsgemäß durch den kennzeichnenden Teil des Anspruchs 1 gelöst.The object is achieved by the characterizing part of claim 1.
Der Vorteil der Erfindung ist ein sicherer Bogentransport vom Bogenstapel bis zu den Vordermarken auch bei hohen Geschwindigkeiten.The advantage of the invention is a safe sheet transport from the sheet stack to the front marks even at high speeds.
In weiterer vorteilhafter Ausgestaltung sind zumindest im Anlegebereich zwei nebeneinander angeordnete Saugkästen angeordnet, so daß die Saugbänder getrennt voneinander im Druckniveau regulierbar sind. Hierdurch kann ein Bogen schon während des Transports auf den Bändern nach links oder rechts in Richtung der Seitenziehmarken oder an vorgesehenen Seitenanschlägen vorausgerichtet werden.In a further advantageous embodiment, two suction boxes arranged next to one another are arranged at least in the contact area, so that the suction belts can be regulated separately in pressure level. As a result, a sheet can already be pre-aligned on the belts during transport to the left or right in the direction of the side pull marks or at the provided side stops.
In vorteilhafter Ausgestaltung sind Mittel vorgesehen, um den Druck in den verschiedenen Saugkammern feinfühlig zu regulieren. Hierdurch ist eine außerordentlich gute Anpassung der gesamten Transportvorrichtung an die jeweiligen Arbeitsbedingungen möglich.In an advantageous embodiment, means are provided in order to regulate the pressure in the various suction chambers sensitively. This enables an extraordinarily good adaptation of the entire transport device to the respective working conditions.
Vorteilhaft ist ebenfalls ein Bereich seitlich der Transportbänder mit Ausgleichsbohrungen versehen. Diese stehen unter atmosphärischem Druck und verhindern, daß seitlich der mit Unterdruck beaufschlagten Transportbänder ein Unterdruck erzeugt wird, der den Bogen gegen eine Fördertischoberfläche ziehen und ihn abbremsen würde. Durch Ausgleichsbohrungen werden die Gleiteigenschaften des Bogens gegenüber der Fördertischoberfläche verbessert und außerdem einer unerwünschten elektrostatischen Aufladung des Bogens entgegengewirkt.An area to the side of the conveyor belts is also advantageously provided with compensating holes. These are under atmospheric pressure and prevent a negative pressure from being generated to the side of the conveyor belts which are subjected to negative pressure and which would pull the sheet against a conveyor table surface and brake it. Compensating holes improve the sliding properties of the sheet relative to the surface of the conveyor table and also counteract undesired electrostatic charging of the sheet.
Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden beschrieben. Es zeigen
- Fig. 1
- eine schematische Seitenansicht der Saugluft beaufschlagten Bogentransportstrecke,
- Fig. 2
- eine schematische Draufsicht auf ein erstes Ausführungsbeispiel der erfindungsgemäßen Vorrichtung,
- Fig. 3
- ein zweites Ausführungsbeispiel,
- Fig. 4
- eine schematische Darstellung der Vorrichtung zur Saugluft-Feineinstellung.
- Fig. 1
- FIG. 2 shows a schematic side view of the sheet transport path subjected to suction air, FIG.
- Fig. 2
- 2 shows a schematic top view of a first exemplary embodiment of the device according to the invention,
- Fig. 3
- a second embodiment,
- Fig. 4
- is a schematic representation of the device for fine adjustment of suction air.
Ein Fördertisch 1 weist in Transportrichtung gesehen zwei Reihen einer Anzahl hintereinander angeordneter Bohrungen 2 (z. B. ⌀ 35 mm) auf. Um den Fördertisch 1 herum sind in Förderrichtung 3 endlose Transportbänder 4 so geführt, daß sie auf einer Oberfläche 6 des Fördertisches 1 gleiten. Die Transportbänder 4 weisen eine Perforation 7 bestehend aus einer Anzahl kleiner Bohrungen (z. B. φ 8 mm) auf, mittels der sie mit den Bohrungen 2 in Deckung bringbar angeordnet sind. Die Transportbänder 4 werden am Anfang und Ende des Fördertisches 1 über Umlenkwalzen 8, 9 und unterhalb des Fördertisches 1 über Umlenkwalzen 11, 12 geführt. Die Umlenkwalzen 11 bis 14 sind antreibbar in Seitengestellen gelagert. Die Umlenkwalze 8 weist einen Antrieb und die Umlenkwalze 11 eine nicht dargestellte Einrichtung zum Verstellen der Umlenkwalze 11 und damit zum Spannen der Transportbänder 4 auf.A conveyor table 1 has two rows of a number of
Unterhalb des Fördertisches 1 sind im Bereich der Bohrungen 2 insgesamt vier Saugkästen 13, 14, 15, 16 vorgesehen, von denen jeweils zwei hintereinander und zwei nebeneinander angeordnet sind. Alle Saugkästen 13 bis 16 sind mit einer gemeinsamen Saugquelle 17 vorzugsweise einem Radialgebläse verbunden. Selbstverständlich kann auch jeder einzelne Saugkasten 13 bis 16 eine eigene regelbare Saugquelle 17 aufweisen. Auch andere Kombinationen sind möglich. Die nebeneinander liegenden Saugkästen 14, 16 weisen jeweils eine Einrichtung zur Druckniveauregulierung auf. Diese sind im Ausführungsbeispiel konstruktiv einfach als Schiebeventile 18, 19 ausgeführt. Die gesamte Saugluftzufuhr zu den Saugkästen 14, 16 ist mittels einer Drosselklappe 20 regulierbar und im Bedarfsfall auch abstellbar.Below the feed table 1, a total of four
Zum Zweck einer Luftzufuhr mit atmosphärischem Druckniveau weisen die Saugkästen 14, 6 an ihrer Unterseite jeweils zwei in Förderrichtung 3 hintereinander angeordnete Öffnungen 21, 22; 23, 24 auf. Diese sind derart angebracht, daß die Öffnungen 21, 22 parallel zu den Öffnungen 23, 24 angeordnet sind. Zwei Schieber 26, 27 sind zur Förderrichtung 3 jeweils in Führungen 28, 29 quer verschiebbar gelagert. Die Schieber 26, 27 bestehen z. B. aus einem Stahlblech oder einer Kunststoffplatte und weisen jeweils zwei Öffnungen 31, 32; 33, 34 auf. Die Öffnungen 31, 32 sind in einer Ausgangsstellung des Schiebers 26 zwischen den Öffnungen 21, 23 angeordnet, d. h. die Öffnungen 21, 23 werden durch den Schieber 26 abgedeckt. Die Öffnungen 33, 34 des Schiebers 27 sind in einer Ausgangsstellung in Förderrichtung 3 gesehen im Ausführungsbeispiel jeweils rechts der Öffnung 22; 24 angeordnet. In dieser Ausgangsstellung sind die Saugkästen 13 bis 16 ringsherum, d. h. von oben durch eine Anzahl von Bögen 36 (Bogenstrom) abgeschlossen und weisen daher eine von der Unterdruckquelle 17 erzeugtes gleiches Druckniveau auf. Der Schieber 27 regelt das Druckniveau der Saugkästen 14, 16, in dem die Öffnungen 33, 34 des Schiebers 27 mehr oder weniger in Deckung gebracht werden mit den Öffnungen 22, 24 der Saugkästen 14, 16. Durch diese Maßnahmen wird den Saugkästen 14, 16 mehr oder weniger atmosphärischer Druck zugeführt.For the purpose of supplying air with an atmospheric pressure level, the
Die Führung der perforierten Transportbänder 4 ist derart vorgesehen, daß diese auf dem Fördertisch 1 in Förderrichtung 3 gesehen auseinanderlaufen, d. h. ein Abstand a der perforierten Transportbänder 4 ist am Anfang des Fördertisches 1 kleiner als ein Abstand b am Ende des Fördertisches 1. Bei einer Förderlänge von z. B. 1.000 mm beträgt die Abweichung jedes perforierten Transportbandes 4 aus der Förderrichtung 3 z. B. 0 bis 15 mm.The
Bei dem ersten Ausführungsbeispiel nach Fig. 2 weist die angetriebene Umlenkwalze 8 im weiteren mit Antriebswalze bezeichnet zur Führung der perforierten Transportbänder 4 jeweils einen kegelstumpfförmigen Wellenabsatz 36, 37 auf. Die Wellenabsätze 36, 37 sind derart im Abstand a angeordnet, daß der größere Durchmesser des Kegelstumpfes jeweils nach außen zu den Enden der Antriebswalze 8 weisend angeordnet ist. Die Umlenkwalze 9 weist ebenfalls in einem Abstand b voneinander beabstandete entsprechende Kegelstumpf-Wellenabsätze 35, 40 auf, die so angeordnet sind, daß jeweils der kleinere Durchmesser des Kegelstumpfes nach außen auf die Enden der Umlenkwalze 9 weisend angeordnet ist.
Zur Durchführung einer Schräglagenkorrektur der Bögen 36 ist die Geschwindigkeit der Transportbänder regelbar. Zu diesem Zweck sind die Antriebswalze 8 und die Umlenkwalze 9 gemeinsam axial verschiebbar gelagert und die Kegelstumpf-Wellenabsätze 35, 36, 37, 40 sind breiter als die Transportbänder 4 ausgeführt. Je nach Lage des Transportbandes 4 auf dem Wellenabsatz 36, 37 ist der treibende Durchmesser bzw. Umfang kleiner oder größer und damit die Geschwindigkeit der Förderbänder 4 proportional dem Umfang der Kegelstümpfe 36, 37 ebenfalls kleiner oder größer.
Die federnd gelagerte Spannwalze 11 weist seitliche Führungen 53 (z. B. Bordscheiben) auf, so daß die Transportbänder 4 seitlich nicht abdriften können. Selbstverständlich ist es auch möglich, die Umlenkwalze 9 und die Antriebswalze 8 stationär drehbar zu lagern und nur die Spannwalze 11 axial verschiebbar zu lagern.In the first exemplary embodiment according to FIG. 2, the driven deflecting
The speed of the conveyor belts can be regulated in order to correct the inclination of the
The spring-loaded
Die Umlenkwalze 9 kann bei sehr kleinen Differenzen zwischen den Abständen a, b auch als durchgehende Walze ausgebildet. Die Abweichung der perforierten Transportbänder 4 aus der Förderrichtung 3 wird dann nur durch die Steigung der Kegelstumpf-Wellenabsätze 36, 37 bestimmt.The
Bei einem zweiten Ausführungsbeispiel sind zur Einstellung der Abweichung der perforierten Transportbänder 4 aus der Förderrichtung 3 Verstellmittel vorgesehen. Die Antriebswalze 8 weist hierbei zur Führung der Transportbänder 4 ballige Wellenabsätze 38, 39 (Faßform) auf.In a second exemplary embodiment, adjustment means are provided to adjust the deviation of the
Die Umlenkwalze 9 ist ersetzt durch zwei einzelne Walzen 41, 42, deren Grundkörper ebenfalls eine ballige Form (Faßform) aufweist. Die Faßwalzen 41, 42 sind jeweils in einem horizontal schwenkbaren Rahmen 43, 44 drehbar gelagert. An die Rahmen 43; 44 ist jeweils das Ende einer Gewindestange 46; 47 angelenkt. Die Gewindestangen 46, 47 sind in Gewindebohrungen 48, 49 im Seitengestell verdrehbar gelagert. Zur leichten Handhabung ist jeweils ein Handrad 51, 52 vorgesehen. Selbstverständlich kann das Handrad 51; 52 im Zuge einer Automation auch durch Stellmotoren ersetzt werden.The deflecting
Zwischen den Transportbändern 4 sind zwei Reihen von Ausgleichsbohrungen 61, 62 vorgesehen, die parallel zu den Bohrungen 2 angeordnet sind. Die Bohrungen 61, 62 stehen in Verbindung mit atmosphärischem Druck auf der Unterseite des Fördertisches 1 und vermeiden dadurch, daß zwischen den Transportbändern 4 ein Unterdruck aufgebaut wird, der eine unerwünschte Bremskraft auf den Bogen ausüben könnte. Im Bedarfsfall können zur Verbesserung der Gleiteigenschaften der Bögen 36 auf dem Fördertisch die Ausgleichsbohrungen 61, 62 auch an eine Druckluftquelle angeschlossen werden (z. B. an die Druckseite des Gebläses 17). Die Ausgleichsbohrungen 61, 62 können auch zusätzlich auf einer Außenseite der Transportbänder 4 im Fördertisch 1 angeordnet sein.Between the
Von einem Bogenstapel 63 werden die Bögen 36 unterschuppt dem Fördertisch 1 zugeführt. Die mit starkem Unterdruck beaufschlagten Saugkästen 13, 15 bewirken, daß die Bögen 36 sicher auf die perforierten Transportbänder 4 gezogen und dort festgehalten werden. Die Bögen 36 werden mittels der Transportbänder 4 bis an vorgesehene Vordermarken 58 transportiert und durch die auseinander laufenden Transportbänder 4 gleichzeitig gestrafft.From a stack of
An den Vordermarken 58 anliegend überdeckt der jeweils vorderste Bogen 36 nur noch den Fördertisch 1 in einem Bereich, in welchem die mit geringerem Unterdruck beaufschlagbaren Saugkästen 14, 16 angeordnet sind. Durch diese Anordnung können nicht dargestellte Seitenziehmarken den an den Vordermarken 58 ausgestreckten Bogen 36 mit kleiner Kraft seitlich ausrichten.
Um den seitlichen Ausrichtweg klein zu halten, werden die Saugkästen 14, 16 mit unterschiedlichem Unterdruck beaufschlagt. Eine Regelung erfolgt mittels des zuvor beschriebenen Schiebers 26. Wird z. B. das, in Förderrichtung 3 gesehen, linksseitig geführte Transportband 4 durch den Saugkasten 14 mit weniger Saugkraft beaufschlagt als das rechtsseitig geführte Transportband 4 vom Saugkasten 16, dann werden sämtliche Bogen während des Transports auf dem Fördertisch nach rechts gezogen.Bearing against the front marks 58, the
In order to keep the lateral alignment path small, the
Selbstverständlich ist es auch möglich, seitliche Anschläge vorzusehen, gegen welche die Bögen 36 während des Transportes auf dem Fördertisch 1 gezogen und seitlich ausgerichtet werden. Weiterhin ist es möglich, seitlich geschuppte Bogenströme zu erzeugen, die von Seitenlagen erkennenden Abtastorganen über die gesamte Bogenlänge erfaßt werden können.Of course, it is also possible to provide lateral stops against which the
- 11
- FördertischPromotion table
- 22nd
- BohrungenHoles
- 33rd
- FörderrichtungDirection of conveyance
- 44th
- TransportbandConveyor belt
- 55
- --
- 66
- Oberfläche (1)Surface (1)
- 77
- Perforationperforation
- 88th
- Umlenkwalze (Antriebswalze)Deflection roller (drive roller)
- 99
- UmlenkwalzeDeflection roller
- 1010th
- --
- 1111
- UmlenkwalzeDeflection roller
- 1212th
- Umlenkwalze (Spannwalze)Deflection roller (tension roller)
- 1313
- SaugkastenSuction box
- 1414
- SaugkastenSuction box
- 1515
- SaugkastenSuction box
- 1616
- SaugkastenSuction box
- 1717th
- Saugquelle (Radialgebläse)Suction source (radial fan)
- 1818th
- SchiebeventilSlide valve
- 1919th
- SchiebeventilSlide valve
- 2020th
- Drosselklappethrottle
- 2121
- Öffnungen (14)Openings (14)
- 2222
- Öffnungen (14)Openings (14)
- 2323
- Öffnungen (16)Openings (16)
- 2424th
- Öffnungen (16)Openings (16)
- 2525th
- --
- 2626
- SchieberSlider
- 2727
- SchieberSlider
- 2828
- Führungen (26)Tours (26)
- 2929
- Führungen (27)Tours (27)
- 3030th
- --
- 3131
- Öffnungen (26)Openings (26)
- 3232
- Öffnungen (26)Openings (26)
- 3333
- Öffnungen (27)Openings (27)
- 3434
- Öffnungen (27)Openings (27)
- 3535
- Wellenabsatz (Kegelstumpf)Shaft shoulder (truncated cone)
- 3636
- Wellenabsatz (Kegelstumpf)Shaft shoulder (truncated cone)
- 3737
- Wellenabsatz (Kegelstumpf)Shaft shoulder (truncated cone)
- 3838
- Wellenabsatz (Faß)Shaft shoulder (barrel)
- 3939
- Wellenabsatz (Faß)Shaft shoulder (barrel)
- 4040
- Wellenabsatz (Kegelstumpf)Shaft shoulder (truncated cone)
- 4141
- FaßwalzeDrum roller
- 4242
- FaßwalzeDrum roller
- 4343
- Rahmenframe
- 4444
- Rahmenframe
- 4545
- --
- 4646
- GewindestangeThreaded rod
- 4747
- GewindestangeThreaded rod
- 4848
- GewindebohrungTapped hole
- 4949
- GewindebohrungTapped hole
- 5050
- --
- 5151
- HandradHandwheel
- 5252
- HandradHandwheel
- 5353
- Führungen (Bordscheiben)Guides (flanged wheels)
- 5454
- --
- 5555
- --
- 5656
- --
- 5757
- --
- 5858
- VordermarkenFront brands
- 5959
- --
- 6060
- --
- 6161
- AusgleichsbohrungenCompensating holes
- 6262
- AusgleichsbohrungenCompensating holes
- 6363
- BogenstapelSheet stack
- aa
- Abstanddistance
- bb
- Abstanddistance
Claims (11)
- Apparatus for guiding a flow, in particular an imbricated flow, of sheets to a sheet-processing machine, having a conveying table (1) provided with perforated endless conveyor belts (4) which circle the latter and can be driven, having at least one suction box (13; 14; 15; 16) which is acted upon by vacuum, is arranged below the conveying table (1) and is connected by way of suction openings (2) in the conveying table (1) to the underside of the perforated conveyor belts (4), characterized in that the conveyor belts (4) are arranged to diverge in the direction of conveying (3) the sheets, so that a spacing (a) between the conveyor belts (4) at the beginning of the conveying table (1) is smaller than a spacing (b) at the end of the conveying table (1).
- Apparatus according to Claim 1, characterized in that the deflection roller (8) has a frustoconical shaft shoulder (36; 37) for each conveyor belt (4).
- Apparatus according to Claim 1, characterized in that actuating means (46 to 49) are provided in order to adjust a deviation of the conveyor belts (4) from the direction of conveying (3).
- Apparatus according to Claims 1 and 3, characterized in that the deflection roller (8) has a barrel-shaped shaft shoulder (38; 39) for each conveyor belt (4), and in that a horizontally pivotally arranged barrel-type roller (41; 42) is provided for each conveyor belt (4).
- Apparatus according to Claims 1 to 4, characterized in that the conveying table (1) has two suction boxes arranged one behind the other and two arranged next to one another, respectively (13 to 16).
- Apparatus according to Claims 1 to 5, characterized in that means (18, 19, 20) for individual suction air regulation are provided at least for the suction boxes (14, 16) arranged in the end region of the conveying table (1).
- Apparatus according to Claims 1 to 6, characterized in that the means (18, 19, 20) are constructed as slide valves and choke valve.
- Apparatus according to Claims 1 to 7, characterized in that at least one row of compensating bores (61; 62) is provided in the conveying table (1) between the conveyor belts (4) which are acted upon by vacuum.
- Apparatus according to Claims 1 to 8, characterized in that compensating bores are provided respectively on both sides of the conveyor belts (4).
- Apparatus according to Claims 1 to 9, characterized in that the drive roller (8) and the deflection roller (-9) are mounted to be axially adjustable, in that the tension roller (11) has lateral guides (53), and in that the frustoconical shaft shoulders (35, 36, 37, 40) are of wider construction than the conveyor belts (4).
- Apparatus according to Claims 1 to 9, characterized in that the tension roller (11) is mounted to be axially adjustable, in that the tension roller (11) has lateral guides (53), and in that the frustoconical shaft shoulders (35, 36, 37, 40) are of wider construction than the conveyor belts (4).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4013302 | 1990-04-26 | ||
DE4013302A DE4013302A1 (en) | 1990-04-26 | 1990-04-26 | DEVICE FOR PROMOTING A PARTICULAR DIVIDED FLOW FROM ARC |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0454011A2 EP0454011A2 (en) | 1991-10-30 |
EP0454011A3 EP0454011A3 (en) | 1992-03-04 |
EP0454011B1 true EP0454011B1 (en) | 1994-07-06 |
Family
ID=6405129
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP91106410A Expired - Lifetime EP0454011B1 (en) | 1990-04-26 | 1991-04-22 | Device for conveying a stream, especially a scaled stream of sheets |
Country Status (6)
Country | Link |
---|---|
US (1) | US5133543A (en) |
EP (1) | EP0454011B1 (en) |
JP (1) | JPH0776060B2 (en) |
CS (1) | CS277541B6 (en) |
DE (2) | DE4013302A1 (en) |
RU (1) | RU2070862C1 (en) |
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DE3831944A1 (en) * | 1988-09-20 | 1990-04-05 | Siemens Ag | Device for unwinding thin ribbons without overstretching |
DE3838078C3 (en) * | 1988-11-10 | 1998-08-13 | Roland Man Druckmasch | Device for conveying a flow of sheets |
-
1990
- 1990-04-26 DE DE4013302A patent/DE4013302A1/en not_active Withdrawn
-
1991
- 1991-04-15 JP JP3082094A patent/JPH0776060B2/en not_active Expired - Lifetime
- 1991-04-17 US US07/686,430 patent/US5133543A/en not_active Expired - Fee Related
- 1991-04-22 DE DE59102096T patent/DE59102096D1/en not_active Expired - Fee Related
- 1991-04-22 EP EP91106410A patent/EP0454011B1/en not_active Expired - Lifetime
- 1991-04-25 CS CS911179A patent/CS277541B6/en not_active IP Right Cessation
- 1991-04-25 RU SU914895148A patent/RU2070862C1/en active
Also Published As
Publication number | Publication date |
---|---|
DE59102096D1 (en) | 1994-08-11 |
JPH0776060B2 (en) | 1995-08-16 |
EP0454011A2 (en) | 1991-10-30 |
DE4013302A1 (en) | 1991-10-31 |
EP0454011A3 (en) | 1992-03-04 |
RU2070862C1 (en) | 1996-12-27 |
CS117991A3 (en) | 1992-01-15 |
JPH04223950A (en) | 1992-08-13 |
US5133543A (en) | 1992-07-28 |
CS277541B6 (en) | 1993-03-17 |
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