EP0309815B1 - Device for feeding sheets to a sheet-processing machine, particularly to a printing machine - Google Patents

Device for feeding sheets to a sheet-processing machine, particularly to a printing machine Download PDF

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Publication number
EP0309815B1
EP0309815B1 EP88115031A EP88115031A EP0309815B1 EP 0309815 B1 EP0309815 B1 EP 0309815B1 EP 88115031 A EP88115031 A EP 88115031A EP 88115031 A EP88115031 A EP 88115031A EP 0309815 B1 EP0309815 B1 EP 0309815B1
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EP
European Patent Office
Prior art keywords
control
roller
sheet
drum
rotation
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
EP88115031A
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German (de)
French (fr)
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EP0309815A3 (en
EP0309815A2 (en
Inventor
Claus Dieter Barrois
Philipp Andreas Dieterich
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Koenig and Bauer AG
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Koenig and Bauer AG
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Publication of EP0309815A3 publication Critical patent/EP0309815A3/en
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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
    • B65H9/00—Registering, e.g. orientating, articles; Devices therefor
    • B65H9/14—Retarding or controlling the forward movement of articles as they approach stops

Definitions

  • the invention relates to a device for feeding sheets to a sheet-processing machine, in particular a printing machine, according to the preamble of claim 1.
  • a paper feed device which has a conveyor belt in order to feed sheets up to pivotable front marks arranged in parallel, as a result of which the sheet is aligned.
  • the paper feed device has a pivotable pressure roller which can be brought into contact with a driven conveyor roller in cycles.
  • the control of the pressure roller and the front marks takes place via a cam which is attached to the cylinder to which the sheet is to be fed, so that the control of the pressure roller and front marks is dependent on the peripheral speed of the cylinder mentioned.
  • the contact time period of the pressure roller with the conveyor roller can be changed.
  • the change is made by preloading a compression spring, and thus changing the spring characteristic or spring force.
  • the compression spring is supported at one end on a lever carrying the pressure roller and at the other end on one with the control cam in operating contact removable control lever.
  • a change in the contact time of the pressure roller with the conveyor roller for example by increasing the spring preload, has the result that the pressure roller is pressed faster against the conveyor roller and is later lifted off again, whereby a sheet lying between the pressure roller and conveyor roller is accelerated earlier and longer. For this reason, the sheet to be fed also hits paper stops of the sheet grippers of the cylinder.
  • the device shown in DE-OS 33 19 753 is based on the disadvantage that an extension of the contact time of the pressure roller with the conveyor roller leads to an advance in the start time for the sheet acceleration.
  • An earlier impact of the sheet on the paper stops is associated with an unfavorable angular position of the gripper pads to the sheet, i.e. the sheet does not strike the paper stops tangentially to the circumference of the cylinder, as a result of which its leading edge is permanently deformed, particularly in the case of thin sheets, which leads to registration difficulties in the further course of printing.
  • the invention has for its object to provide a device for feeding a sheet to a printing cylinder with which the bias of the sheet (bulk) can be adjusted without changing the arrival time of the sheet on the cylinder.
  • the advantages that can be achieved with the invention lie in particular in that the sheet always hits tangentially to the circumference of the impression cylinder on paper stops of the gripper row of the impression cylinder and that the bag of the sheet can also be adjusted during the sheet feeding.
  • the adjustment of the bag not only ensures that the sheet is gripped securely and in register, but also has a noise-reducing effect. Adjustment during sheet feeding avoids machine downtimes.
  • the paper feed device 1 shown in FIG. 1 is arranged between a printing cylinder 2 and a conveyor belt 3.
  • the conveyor belt 3 wraps around a drive roller 4 and is driven by this.
  • the drive roller 4 is rotatably mounted in a known manner in side frames 5 of the paper feed device 1.
  • the drive roller 4 is driven in a known and therefore not detailed manner from the main drive of the printing press with a small transmission ratio, so that the conveying speed of the conveyor belt 3 is somewhat higher, than the peripheral speed of the printing cylinder 2.
  • the paper feed device 1 has, inter alia, a two-part sheet guide plate 6, 7 arranged in the extension of a conveying plane 10, on which a sheet 8 is conveyed directly to the printing cylinder 2.
  • the first sheet guide plate 6 has a plurality of through bores 9 arranged next to one another transversely to the conveying direction.
  • the second sheet guide plate 7 is a comb plate and has a number of adjacent recesses 11 through which grippers 12 arranged on the pressure cylinder 2 are guided.
  • the grippers 12 cooperate with gripper pads 15, each of which has a sheet stop 14.
  • the grippers 12 are shown in Fig. 1 in two positions I, II.
  • the position I indicates the moment when the sheet 8 strikes the sheet stop 14 almost tangentially on the circumference of the printing cylinder 2.
  • Position II marks the gripper closure and the tangential pulling of the sheet 8 from the conveying plane 10.
  • a photocell 20 is arranged, which detects whether a flow of sheets 8 is interrupted or not.
  • An acceleration roller 16 is arranged in a gap 13 between the sheet guide plates 6, 7 and its jacket 17 protrudes a little beyond the conveying plane 10 of the sheet guide plates 6, 7.
  • the acceleration roller 16 is driven with a small ratio from the main drive of the printing press, so that its Peripheral speed is a little higher (approx.1.27 times) than that of the printing cylinder 2.
  • the acceleration roller 16 there are a number of swiveling pressure rollers 18 which are arranged next to one another transversely to the conveying direction.
  • the pressure rollers 18 are each rotatably mounted on a first end 19 of levers 21. With a second end 22, the levers 21 are fastened to an outer tube 23 of a coaxial shaft.
  • the outer tube 23 is rotatably mounted on an inner part 24 of the coaxial shaft.
  • the inner part 24 of the coaxial shaft which is rotatably mounted in the side frame 5 of the paper feed device 1, has a number of bores 26 in the axial direction, that is to say transversely to the conveying direction, into each of which a lever 27 is firmly inserted.
  • the outer tube 23 of the coaxial shaft has as many slots 28, so that the levers 27 are freely pivoted through the slots 28.
  • the levers 27 are arranged approximately parallel to the levers 21 and carry 29 front marks 31 at their ends.
  • the front marks 31 protrude a little into the recesses 11 of the comb plate 7 in the downwardly pivoted position.
  • the outer tube 23 and the inner part 24 of the coaxial shaft are except for the levers 21; 27 still with two control levers 36; 35 firmly connected.
  • the control levers 36, 35 each have at their end 37; 40 a receptacle 38; 45 for a tension spring 39; 50 on that to apply a restoring force on Side frame 5 is attached.
  • the control lever 36 has a pin 41 on which a control roller 42 is rotatably mounted.
  • the control roller 42 is in constant contact with the surface area 43 of a control drum 44 by the force of the tension spring 39.
  • the control drum 44 is secured in a rotationally fixed manner by a feather key 46, but is axially displaceable on a right end 48 of a single-turn shaft 47, so that the control roller 42 also all surface areas 43 of the control drum 44 can be brought into contact.
  • the control roller 42 it is also possible to arrange the control roller 42 in an axially displaceable manner in order to bring it into contact with all surface regions 43 of the control drum 44.
  • the single-turn shaft 47 is rotatably supported with its center 49 in the side frame 5 of the drive side.
  • a left end 51 of the single-turn shaft 47 carries a rotationally and displaceably, another control cam 52, which is in constant contact with a control roller 54.
  • the control roller 54 is rotatably fastened to the control lever 35 and controls the movement of the front marks 31.
  • the drive pinion 56 is driven together with a shaft 57 for the acceleration roller 16, via a gear 58, by the main drive 59 of the printing press.
  • the control drum 44 is axially displaceable on the single-turn shaft 47 by means of an adjusting spindle 61.
  • the adjusting spindle 61 is one in a vertical part 62 to the side frame 5 screwed horizontal cross member 63 rotatably.
  • the adjusting spindle 61 has a thread 64 which is in screw contact with a threaded bore 66 of a cuboid-shaped adjusting element 67.
  • the threaded bore 66 is arranged exactly in the middle of a bottom 68 of the actuating element 67.
  • the actuating element 67 lies with an upper side 65 on a lower side 70 of the cross member 63 and has a horizontal counterbore 75 which coaxially surrounds a hub 69 of the control drum 44.
  • a roller bearing 71 which is also able to absorb axial forces, establishes the connection between the actuating element 67 and the control drum 44.
  • the adjusting spindle 61 has a knurled head 72 which facilitates manual operation of the adjusting spindle 61.
  • the adjusting spindle 61 can also be connected to the shaft of a servomotor, so that remote adjustment is also possible.
  • the control drum 44 is a cylindrical body with a radius R, which has a recess 73 with a smaller radius r on its circumference.
  • the recess 73 is long as the control drum and has an opening or switching angle ⁇ which changes continuously along an axis of rotation 77 of the control drum 44.
  • ⁇ opening or switching angle
  • the control roller 42 of the control lever 36 dips into this recess 73 with each revolution of the single-turn shaft 47 and runs on the surface region 43 with the smaller radius r.
  • the recess 73 has a first axis-parallel control line 74 and a second, non-parallel control line 76, however, arranged with a constant radius r to the axis of rotation 77.
  • the control lines 74, 76 indicate the position of the pressure rollers 18 relative to the acceleration rollers 16. When the control roller 42 crosses the control line 74, the pressure rollers 18 are pressed onto the acceleration rollers 16 “acceleration on”. When the control roller 42 crosses the control line 76, the pressure rollers 18 move away from the acceleration rollers 16 “acceleration off”.
  • the opening or switching angle ⁇ of the recess 73 in the control drum 44 is, as shown in FIG. 3, larger at a front edge 91 of the control drum 44 than at a rear edge 92.
  • the control drum 44 is rounded in all surface areas 43 so that the contact the control roller 42 with the control drum 44 is guaranteed over the full rotation of the single-turn shaft 47 and impacts that would result from lifting and placing the control roller 42 on sharp edges are avoided.
  • the photocell 20 is connected to an electromagnet 81 by means of a switching relay 79.
  • the electromagnet 81 has a shift rod 82 which can be moved out or in and which is articulated with an upper end 83 to a first end 84 of a coupling 86.
  • the coupling 86 is connected in a rotationally fixed manner by means of a second end 87 to an actuating shaft 88 mounted in the side frames 5.
  • two blocking cams 89 are attached at a distance. The blocking cams 89 each engage directly on the control lever 36 for the pressure rollers 18 or on the control lever 35 for the front marks 31 and block a pivoting movement of the control lever 35 when the photocells 20 signal an interruption in the sheet feed flow.
  • the adjusting spindle 61 rotated clockwise or counterclockwise. Rotation of the adjusting spindle 61, for example clockwise, causes the adjusting element 67 to be displaced and, associated therewith, the control drum 44 to be displaced to the right. The control roller 42 thereby comes into continuous contact with other surface areas 43 of the control drum 44.
  • the control roller 42 In a surface area 43 near the front edge 91, the control roller 42 is in contact longer due to the larger opening or switching angle ⁇ (for example 30 ° -100 °) with the smaller radius r of the control drum 44 than in a surface area 43 in the vicinity of the rear edge 92. It follows that the pressure roller 18 is also in contact with the acceleration roller 16 for a correspondingly longer time. This means that the start for the acceleration of a sheet 8 always remains constant and only the end of acceleration and thus the total acceleration duration changes.
  • ⁇ for example 30 ° -100 °

Landscapes

  • Delivering By Means Of Belts And Rollers (AREA)
  • Registering Or Overturning Sheets (AREA)
  • Feeding Of Articles By Means Other Than Belts Or Rollers (AREA)

Description

Die Erfindung betrifft eine Vorrichtung zum Zuführen von Bogen an eine bogenverarbeitende Maschine, insbesondere Druckmaschine gemäß dem Oberbegriff des Patentanspruches 1.The invention relates to a device for feeding sheets to a sheet-processing machine, in particular a printing machine, according to the preamble of claim 1.

Durch die DE-OS 33 19 753 ist eine Papierzuführungsvorrichtung bekannt geworden, die ein Förderband aufweist, um Bogen bis an parallel angeordnete, abschwenkbare Vordermarken heranzuführen, wodurch der Bogen ausgerichtet wird. Außerdem weist die Papierzuführungsvorrichtung eine schwenkbare Andrückrolle auf, die taktweise mit einer getriebenen Förderrolle in Kontakt bringbar ist. Die Steuerung der Andrückrolle und der Vordermarken erfolgt über einen Nocken, der an dem Zylinder angebracht ist, dem der Bogen zugeführt werden soll, so daß die Steuerung der Andrückrolle und Vordermarken von der Umfangsgeschwindigkeit des genannten Zylinders abhängig ist. Um die Steuerung der Andrückrolle bezüglich des Öffnens und Schließens einer Greiferreihe des Zylinders einstellen zu können, ist die Kontaktzeitdauer der Andrückwalze mit der Förderrolle veränderbar. Die Veränderung erfolgt durch Vorspannung einer Druckfeder, und damit Veränderung der Federcharakteristik, bzw. Federkraft. Die Druckfeder stützt sich mit einem Ende an einem die Andrückrolle tragenden Hebel und mit dem anderen Ende an einem, mit dem Steuernocken in Betätigungskontakt bringbaren Steuerhebel ab. Eine Veränderung der Kontaktzeit der Andrückrolle mit der Förderrolle z.B. durch Erhöhung der Federvorspannung hat zur Folge, daß die Andrückrolle schneller gegen die Förderrolle gepreßt wird und später wieder abgehoben wird, wodurch ein zwischen Andrückwalze und Förderrolle liegender Bogen eher und länger beschleunigt wird. Aus diesem Grund trifft der zuzuführende Bogen auch eher auf Papieranschläge der Bogengreifer des Zylinders auf.From DE-OS 33 19 753 a paper feed device has become known which has a conveyor belt in order to feed sheets up to pivotable front marks arranged in parallel, as a result of which the sheet is aligned. In addition, the paper feed device has a pivotable pressure roller which can be brought into contact with a driven conveyor roller in cycles. The control of the pressure roller and the front marks takes place via a cam which is attached to the cylinder to which the sheet is to be fed, so that the control of the pressure roller and front marks is dependent on the peripheral speed of the cylinder mentioned. In order to be able to set the control of the pressure roller with respect to the opening and closing of a row of grippers of the cylinder, the contact time period of the pressure roller with the conveyor roller can be changed. The change is made by preloading a compression spring, and thus changing the spring characteristic or spring force. The compression spring is supported at one end on a lever carrying the pressure roller and at the other end on one with the control cam in operating contact removable control lever. A change in the contact time of the pressure roller with the conveyor roller, for example by increasing the spring preload, has the result that the pressure roller is pressed faster against the conveyor roller and is later lifted off again, whereby a sheet lying between the pressure roller and conveyor roller is accelerated earlier and longer. For this reason, the sheet to be fed also hits paper stops of the sheet grippers of the cylinder.

Der in der DE-OS 33 19 753 gezeigten Vorrichtung liegt der Nachteil zugrunde, daß eine Verlängerung der Kontaktzeit der Andrückwalze mit der Förderrolle eine Vorverlegung der Startzeit für die Bogenbeschleunigung zur Folge hat. Eine frühere Auftreffzeit des Bogens auf die Papieranschläge ist aber mit einer ungünstigen Winkelstellung der Greiferauflagen zum Bogen verbunden, d.h. der Bogen trifft nicht tangential zum Umfang des Zylinders auf die Papieranschläge auf, wodurch seine Vorderkante insbesondere bei dünnen Bogen bleibend verformt wird, was im weiteren Druckverlauf zu Passerschwierigkeiten führt.The device shown in DE-OS 33 19 753 is based on the disadvantage that an extension of the contact time of the pressure roller with the conveyor roller leads to an advance in the start time for the sheet acceleration. An earlier impact of the sheet on the paper stops is associated with an unfavorable angular position of the gripper pads to the sheet, i.e. the sheet does not strike the paper stops tangentially to the circumference of the cylinder, as a result of which its leading edge is permanently deformed, particularly in the case of thin sheets, which leads to registration difficulties in the further course of printing.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zum Zuführen eines Bogens zu einem Druckzylinder zu schaffen, mit der die Vorspannung des Bogens (Bauschung) eingestellt werden kann, ohne daß die Ankunftszeit des Bogens auf dem Zylinder verändert wird.The invention has for its object to provide a device for feeding a sheet to a printing cylinder with which the bias of the sheet (bulk) can be adjusted without changing the arrival time of the sheet on the cylinder.

Die Aufgabe wird erfindungsgemäß durch den kennzeichnenden Teil des Patentanspruches 1 gelöst.The object is achieved by the characterizing part of claim 1.

Die mit der Erfindung erzielbaren Vorteile liegen insbesondere darin, daß der Bogen immer tangential zum Umfang des Druckzylinders auf Papieranschläge der Greiferreihe des Druckzylinder auftrifft und daß die Bauschung des Bogens auch während der Bogenzuführung eingestellt werden kann. Die Einstellung der Bauschung gewährleistet nicht nur ein sicheres, passergenaues Greifen des Bogens, sondern wirkt sich auch geräuschdämpfend aus. Die Verstellung während der Bogenzuführung vermeidet Stillstandszeiten der Maschine.The advantages that can be achieved with the invention lie in particular in that the sheet always hits tangentially to the circumference of the impression cylinder on paper stops of the gripper row of the impression cylinder and that the bag of the sheet can also be adjusted during the sheet feeding. The adjustment of the bag not only ensures that the sheet is gripped securely and in register, but also has a noise-reducing effect. Adjustment during sheet feeding avoids machine downtimes.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden beschrieben. Es zeigen

Fig. 1
eine Seitenansicht der erfindungsgemäßen Vorrichtung in schematischer Darstellung,
Fig. 2
eine Draufsicht auf die Vorrichtung nach Fig. 1,
Fig. 3
eine Steuerkurve.

An embodiment of the invention is shown in the drawings and is described below. Show it
Fig. 1
a side view of the device according to the invention in a schematic representation,
Fig. 2
2 shows a top view of the device according to FIG. 1,
Fig. 3
a control curve.

Die in Fig. 1 gezeigte Papierzuführungsvorrichtung 1 ist zwischen einem Druckzylinder 2 und einem Förderband 3 angeordnet. Das Förderband 3 umschlingt eine Antriebsrolle 4 und wird von dieser angetrieben. Die Antriebsrolle 4 ist in bekannter Weise in Seitengestellen 5 der Papierzuführungsvorrichtung 1 drehbar gelagert. Die Antriebsrolle 4 wird in ebenfalls bekannter und daher nicht näher aufgeführter Weise vom Hauptantrieb der Druckmaschine mit einer kleinen Übersetzung angetrieben, so daß die Fördergeschwindingkeit des Förderbandes 3 etwas höher ist, als die Umfangsgeschwindigkeit des Druckzylinders 2. Die Papierzuführungsvorrichtung 1 weist u.a. ein in Verlängerung einer Förderebene 10 angeordnetes zweiteiliges Bogenleitblech 6, 7 auf, auf dem ein Bogen 8 unmittelbar bis an den Druckzylinder 2 gefördert wird. Das erste Bogenleitblech 6 weist mehrere quer zur Förderrichtung nebeneinander angeordnete, durchgehende Bohrungen 9 auf.The paper feed device 1 shown in FIG. 1 is arranged between a printing cylinder 2 and a conveyor belt 3. The conveyor belt 3 wraps around a drive roller 4 and is driven by this. The drive roller 4 is rotatably mounted in a known manner in side frames 5 of the paper feed device 1. The drive roller 4 is driven in a known and therefore not detailed manner from the main drive of the printing press with a small transmission ratio, so that the conveying speed of the conveyor belt 3 is somewhat higher, than the peripheral speed of the printing cylinder 2. The paper feed device 1 has, inter alia, a two-part sheet guide plate 6, 7 arranged in the extension of a conveying plane 10, on which a sheet 8 is conveyed directly to the printing cylinder 2. The first sheet guide plate 6 has a plurality of through bores 9 arranged next to one another transversely to the conveying direction.

Das zweite Bogenleitblech 7 ist ein Kammblech und weist eine Anzahl nebeneinander liegender Aussparungen 11 auf, durch welche am Druckzylinder 2 angeordnete Greifer 12 hindurchgeführt werden. Die Greifer 12 wirken mit Greiferauflagen 15, die jeweils einen Bogenanschlag 14 aufweisen, zusammen. Die Greifer 12 sind in Fig. 1 in zwei Stellungen I, II dargestellt. Die Stellung I kennzeichnet den Moment, wenn der Bogen 8 auf den Bogenanschlag 14 nahezu tangential auf den Umfang des Druckzylinders 2 auftrifft. Die Stellung II kennzeichnet den Greiferschluß und das tangentiale Abziehen des Bogens 8 von der Förderebene 10.The second sheet guide plate 7 is a comb plate and has a number of adjacent recesses 11 through which grippers 12 arranged on the pressure cylinder 2 are guided. The grippers 12 cooperate with gripper pads 15, each of which has a sheet stop 14. The grippers 12 are shown in Fig. 1 in two positions I, II. The position I indicates the moment when the sheet 8 strikes the sheet stop 14 almost tangentially on the circumference of the printing cylinder 2. Position II marks the gripper closure and the tangential pulling of the sheet 8 from the conveying plane 10.

Unmittelbar unterhalb der Bohrungen 9 ist jeweils eine Fotozelle 20 angeordnet, die wahrnimmt, ob ein Förderstrom von Bogen 8 unterbrochen ist oder nicht.Immediately below the holes 9, a photocell 20 is arranged, which detects whether a flow of sheets 8 is interrupted or not.

In einer Lücke 13 zwischen den Bogenleitblechen 6, 7 ist eine Beschleunigungsrolle 16 angeordnet, die mit ihrem Mantel 17 ein wenig über die Förderebene 10 der Bogenleitbleche 6, 7 herausragt. Die Beschleunigungsrolle 16 wird mit einer kleinen Übersetzung vom Hauptantrieb der Druckmaschine angetrieben, so daß ihre Umfangsgeschwindigkeit ein wenig höher ist (ca. 1,27-fach), als die des Druckzylinders 2.An acceleration roller 16 is arranged in a gap 13 between the sheet guide plates 6, 7 and its jacket 17 protrudes a little beyond the conveying plane 10 of the sheet guide plates 6, 7. The acceleration roller 16 is driven with a small ratio from the main drive of the printing press, so that its Peripheral speed is a little higher (approx.1.27 times) than that of the printing cylinder 2.

Oberhalb der Beschleunigungsrolle 16 ist eine Anzahl von quer zur Förderrichtung nebeneinanderliegender, schwenkbarer Andrückrollen 18 angeordnet. Die Andrückrollen 18 sind jeweils an einem ersten Ende 19 von Hebeln 21 drehbar gelagert. Mit einem zweiten Ende 22 sind die Hebel 21 an einem Außenrohr 23 einer Koaxialwelle befestigt. Das Außenrohr 23 ist drehbar auf einem Innenteil 24 der Koaxialwelle gelagert. Das im Seitengestell 5 der Papierzuführungsvorrichtung 1 drehbar gelagerte Innenteil 24 der Koaxialwelle weist in axialer Richtung, also quer zur Förderrichtung, in Abständen eine Anzahl von Bohrungen 26 auf, in die jeweils ein Hebel 27 fest eingefügt ist. Das Außenrohr 23 der Koaxialwelle weist ebenso viele Schlitze 28 auf, so daß die Hebel 27 frei schwenkbar durch die Schlitze 28 hindurchgeführt sind. Die Hebel 27 sind in etwa parallel zu den Hebeln 21 angeordnet und tragen an ihren Enden 29 Vordermarken 31. Die Vordermarken 31 ragen in abwärts geschwenkter Stellung ein wenig in die Aussparungen 11 des Kammbleches 7 hinein. In etwa der Mitte der Hebel 27 ist jeweils ein Niederhalter 32 angeordnet, der mit einem in Förderrichtung gebogenen Ende 33 beim Abschwenken der Vordermarken 31 auf eine Oberseite 34 des Bogens 8 drückt.Above the acceleration roller 16 there are a number of swiveling pressure rollers 18 which are arranged next to one another transversely to the conveying direction. The pressure rollers 18 are each rotatably mounted on a first end 19 of levers 21. With a second end 22, the levers 21 are fastened to an outer tube 23 of a coaxial shaft. The outer tube 23 is rotatably mounted on an inner part 24 of the coaxial shaft. The inner part 24 of the coaxial shaft, which is rotatably mounted in the side frame 5 of the paper feed device 1, has a number of bores 26 in the axial direction, that is to say transversely to the conveying direction, into each of which a lever 27 is firmly inserted. The outer tube 23 of the coaxial shaft has as many slots 28, so that the levers 27 are freely pivoted through the slots 28. The levers 27 are arranged approximately parallel to the levers 21 and carry 29 front marks 31 at their ends. The front marks 31 protrude a little into the recesses 11 of the comb plate 7 in the downwardly pivoted position. Approximately in the middle of the levers 27 there is a hold-down device 32 which, with an end 33 bent in the conveying direction, presses on an upper side 34 of the sheet 8 when the front marks 31 are pivoted away.

Das Außenrohr 23 und das Innenteil 24 der Koaxialwelle sind außer mit den Hebeln 21; 27 noch mit zwei Steuerhebeln 36; 35 fest verbunden. Die Steuerhebel 36, 35 weisen jeweils an ihrem Ende 37; 40 eine Aufnahme 38; 45 für eine Zugfeder 39; 50 auf, die zur Aufbringung einer Rückstellkraft am Seitengestell 5 befestigt ist. In der Mitte weist der Steuerhebel 36 einen Bolzen 41 auf, auf dem eine Steuerrolle 42 drehbar gelagert ist.The outer tube 23 and the inner part 24 of the coaxial shaft are except for the levers 21; 27 still with two control levers 36; 35 firmly connected. The control levers 36, 35 each have at their end 37; 40 a receptacle 38; 45 for a tension spring 39; 50 on that to apply a restoring force on Side frame 5 is attached. In the middle, the control lever 36 has a pin 41 on which a control roller 42 is rotatably mounted.

Die Steuerrolle 42 steht durch die Kraft der Zugfeder 39 in ständigem Berührungskontakt mit einem Oberflächenbereich 43 einer Steuertrommel 44. Die Steuertrommel 44 sitzt durch eine Paßfeder 46 gesichert drehfest, jedoch axial verschiebbar auf einem rechten Ende 48 einer Eintourenwelle 47, so daß die Steuerrolle 42 mit allen Oberflächenbereichen 43 der Steuertrommel 44 in Kontakt bringbar ist. Selbstverständlich ist es auch möglich die Steuerrolle 42 axial verschiebbar anzuordnen, um sie mit allen Oberflächenbereichen 43 der Steuertrommel 44 in Kontakt zu bringen. Die Eintourenwelle 47 ist mit ihrer Mitte 49 im Seitengestell 5 der Antriebsseite drehbar gelagert. Ein linkes Ende 51 der Eintourenwelle 47 trägt dreh- und verschiebefest, eine weitere Steuerkurve 52, die in ständigem Kontakt mit einer Steuerrolle 54 ist. Die Steuerrolle 54 ist drehbar an dem Steuerhebel 35 befestigt und steuert die Bewegung der Vordermarken 31. Ebenfalls auf dem linken Ende 51 der Eintourenwelle 47 unmittelbar neben der Steuerkurve 52 ist ein Antriebsrad 53 angeordnet, das mittels eines Gurtes 55 mit einem Antriebsritzel 56 verbunden ist. Das Antriebsritzel 56 wird gemeinsam mit einer Welle 57 für die Beschleunigungsrolle 16, über ein Zahnrad 58, vom Hauptantrieb 59 der Druckmaschine angetrieben. Die Steuertrommel 44 ist, mittels einer Stellspindel 61 auf der Eintourenwelle 47 axial verschiebbar, gelagert.The control roller 42 is in constant contact with the surface area 43 of a control drum 44 by the force of the tension spring 39. The control drum 44 is secured in a rotationally fixed manner by a feather key 46, but is axially displaceable on a right end 48 of a single-turn shaft 47, so that the control roller 42 also all surface areas 43 of the control drum 44 can be brought into contact. Of course, it is also possible to arrange the control roller 42 in an axially displaceable manner in order to bring it into contact with all surface regions 43 of the control drum 44. The single-turn shaft 47 is rotatably supported with its center 49 in the side frame 5 of the drive side. A left end 51 of the single-turn shaft 47 carries a rotationally and displaceably, another control cam 52, which is in constant contact with a control roller 54. The control roller 54 is rotatably fastened to the control lever 35 and controls the movement of the front marks 31. Also on the left end 51 of the single-turn shaft 47 directly next to the control cam 52 there is a drive wheel 53 which is connected to a drive pinion 56 by means of a belt 55. The drive pinion 56 is driven together with a shaft 57 for the acceleration roller 16, via a gear 58, by the main drive 59 of the printing press. The control drum 44 is axially displaceable on the single-turn shaft 47 by means of an adjusting spindle 61.

Die Stellspindel 61 ist in einem vertikalen Teil 62 einer an das Seitengestell 5 angeschraubten horizontalen Traverse 63 drehbar gelagert. Die Stellspindel 61 weist ein Gewinde 64 auf, das mit einer Gewindebohrung 66 eines quaderförmigen Stellelementes 67 in Schraubkontakt steht. Die Gewindebohrung 66 ist genau in der Mitte eines Bodens 68 des Stellelementes 67 angeordnet. Das Stellelement 67 liegt mit einer Oberseite 65 an einer Unterseite 70 der Traverse 63 verschiebbar an und weist eine horizontale Senkbohrung 75 auf, die eine Nabe 69 der Steuertrommel 44 koaxial umgibt. Ein Wälzlager 71, das auch in der Lage ist axiale Kräfte aufzunehmen, stellt die Verbindung zwischen dem Stellelement 67 und der Steuertrommel 44 her. Die Stellspindel 61 weist einen gerändelten Kopf 72 auf, der eine manuelle Bedienung der Stellspindel 61 erleichtert. Selbstverständlich läßt sich die Stellspindel 61 auch mit der Welle eines Stellmotors verbinden, so daß auch eine Fernverstellung möglich ist.The adjusting spindle 61 is one in a vertical part 62 to the side frame 5 screwed horizontal cross member 63 rotatably. The adjusting spindle 61 has a thread 64 which is in screw contact with a threaded bore 66 of a cuboid-shaped adjusting element 67. The threaded bore 66 is arranged exactly in the middle of a bottom 68 of the actuating element 67. The actuating element 67 lies with an upper side 65 on a lower side 70 of the cross member 63 and has a horizontal counterbore 75 which coaxially surrounds a hub 69 of the control drum 44. A roller bearing 71, which is also able to absorb axial forces, establishes the connection between the actuating element 67 and the control drum 44. The adjusting spindle 61 has a knurled head 72 which facilitates manual operation of the adjusting spindle 61. Of course, the adjusting spindle 61 can also be connected to the shaft of a servomotor, so that remote adjustment is also possible.

Die Steuertrommel 44 ist ein zylindrischer Körper mit einem Radius R, der an seinem Umfang eine Ausnehmung 73 mit einem kleineren Radius r aufweist. Die Ausnehmung 73 ist steuertrommellang und weist einen Öffnungs- bzw. Schaltwinkel α auf, der sich entlang einer Drehachse 77 der Steuertrommel 44 stufenlos ändert. Es besteht natürlich auch die Möglichkeit die Steuertrommel 44 aus mehreren Steuerscheiben zusammenzusetzen.The control drum 44 is a cylindrical body with a radius R, which has a recess 73 with a smaller radius r on its circumference. The recess 73 is long as the control drum and has an opening or switching angle α which changes continuously along an axis of rotation 77 of the control drum 44. Of course, there is also the possibility of assembling the control drum 44 from several control disks.

Die Steuerrolle 42 des Steuerhebels 36 taucht bei jeder Umdrehung der Eintourenwelle 47 in diese Ausnehmung 73 ein und läuft auf dem Oberflächenbereich 43 mit dem kleineren Radius r ab. Die Ausnehmung 73 weist eine erste achsparallele Steuerlinie 74 und eine zweite, nicht parallele jedoch mit konstantem Radius r zur Drehachse 77 angeordnete Steuerlinie 76 auf. Die Steuerlinien 74, 76 kennzeichnen die Stellung der Andrückrollen 18 zu den Beschleunigungsrollen 16. Beim Überqueren der Steuerlinie 74 durch die Steuerrolle 42 erfolgt ein Andrücken der Andrückrollen 18 an die Beschleunigungsrollen 16 "Beschleunigung an". Bei Überqueren der Steuerlinie 76 durch die Steuerrolle 42 erfolgt ein Abrücken der Andrückrollen 18 von den Beschleunigungsrollen 16 "Beschleunigung ab". Die Steuerlinien 74, 76 bzw. deren Verlängerungen schneiden sich unter einem spitzen Winkel β (z.B. β = 20°). Der Öffnungs- bzw. Schaltwinkel α der Ausnehmung 73 in der Steuertrommel 44 ist wie in Fig. 3 gezeigt, an einer Vorderkante 91 der Steuertrommel 44 größer als an einer Hinterkante 92. Die Steuertrommel 44 ist in allen Oberflächenbereichen 43 gerundet ausgeführt, damit der Kontakt der Steuerrolle 42 mit der Steuertrommel 44 über die volle Umdrehung der Eintourenwelle 47 gewährleistet ist und Schläge, die durch ein Abheben und Aufsetzen der Steuerrolle 42 an scharfen Kanten entstehen würden, vermieden werden.The control roller 42 of the control lever 36 dips into this recess 73 with each revolution of the single-turn shaft 47 and runs on the surface region 43 with the smaller radius r. The recess 73 has a first axis-parallel control line 74 and a second, non-parallel control line 76, however, arranged with a constant radius r to the axis of rotation 77. The control lines 74, 76 indicate the position of the pressure rollers 18 relative to the acceleration rollers 16. When the control roller 42 crosses the control line 74, the pressure rollers 18 are pressed onto the acceleration rollers 16 “acceleration on”. When the control roller 42 crosses the control line 76, the pressure rollers 18 move away from the acceleration rollers 16 “acceleration off”. The control lines 74, 76 or their extensions intersect at an acute angle β (for example β = 20 °). The opening or switching angle α of the recess 73 in the control drum 44 is, as shown in FIG. 3, larger at a front edge 91 of the control drum 44 than at a rear edge 92. The control drum 44 is rounded in all surface areas 43 so that the contact the control roller 42 with the control drum 44 is guaranteed over the full rotation of the single-turn shaft 47 and impacts that would result from lifting and placing the control roller 42 on sharp edges are avoided.

Die Fotozelle 20 ist mittels eines Schaltrelais 79 mit einem Elektromagenten 81 verbunden. Der Elektromagnet 81 weist eine, je nach Ankerstellung des Elektromagneten 81, heraus- bzw. hereinverschiebbare Schaltstange 82 auf, die mit einem oberen Ende 83 an ein erstes Ende 84 einer Koppel 86 angelenkt ist. Die Koppel 86 ist mittels eines zweiten Endes 87 mit einer in den Seitengestellen 5 gelagerten Stellwelle 88 drehfest verbunden. Auf der Stellwelle 88 sind in einem Abstand zwei Blockiernocken 89 befestigt. Die Blockiernocken 89 greifen jeweils direkt am Steuerhebel 36 für die Andrückrollen 18, bzw. am Steuerhebel 35 für die Vordermarken 31 an und blockieren eine Schwenkbewegung der Steuerhebel 35 wenn die Fotozellen 20 eine Unterbrechung des Bogenförderstroms signalisieren.The photocell 20 is connected to an electromagnet 81 by means of a switching relay 79. Depending on the armature position of the electromagnet 81, the electromagnet 81 has a shift rod 82 which can be moved out or in and which is articulated with an upper end 83 to a first end 84 of a coupling 86. The coupling 86 is connected in a rotationally fixed manner by means of a second end 87 to an actuating shaft 88 mounted in the side frames 5. On the Actuating shaft 88 two blocking cams 89 are attached at a distance. The blocking cams 89 each engage directly on the control lever 36 for the pressure rollers 18 or on the control lever 35 for the front marks 31 and block a pivoting movement of the control lever 35 when the photocells 20 signal an interruption in the sheet feed flow.

Soll nun die Bauschung des Bogens 8, d.h. dessen Vorspannung, die nach dem Auftreffen auf die Greiferanschläge 14 und vor dem Schließen der Greifer 12 entsteht, verstellt werden, wie dies z.B. beim Ändern der Papierart oder -stärke der Fall sein kann, wird die Stellspindel 61 im oder gegen den Uhrzeigersinn gedreht. Eine Drehung der Stellspindel 61 z.B. im Uhrzeigersinn bewirkt eine Verschiebung des Stellelementes 67 und damit verbunden eine Verschiebung der Steuertrommel 44 nach rechts. Die Steuerrolle 42 kommt dadurch stufenlos in Kontakt mit anderen Oberflächenbereichen 43 der Steuertrommel 44. In einem Oberflächenbereich 43 in der Nähe der Vorderkante 91 ist die Steuerrolle 42 durch den größeren Öffnungs- bzw. Schaltwinkel α (z.B. 30°-100°) länger im Kontakt mit dem kleineren Radius r der Steuertrommel 44 als in einem Oberflächenbereich 43 in der Nähe der Hinterkante 92. Daraus folgt, daß die Andrückrolle 18 auch entsprechend länger mit der Beschleunigungsrolle 16 in Kontakt ist. Dies bedeutet, daß der Start für die Beschleunigung eines Bogens 8 immer konstant bleibt und sich lediglich das Beschleunigungsende und damit die Beschleunigungsgesamtdauer ändert.If the bulge of the sheet 8, ie its pretension, which occurs after hitting the gripper stops 14 and before the gripper 12 is closed, is to be adjusted, as can be the case, for example, when changing the paper type or thickness, the adjusting spindle 61 rotated clockwise or counterclockwise. Rotation of the adjusting spindle 61, for example clockwise, causes the adjusting element 67 to be displaced and, associated therewith, the control drum 44 to be displaced to the right. The control roller 42 thereby comes into continuous contact with other surface areas 43 of the control drum 44. In a surface area 43 near the front edge 91, the control roller 42 is in contact longer due to the larger opening or switching angle α (for example 30 ° -100 °) with the smaller radius r of the control drum 44 than in a surface area 43 in the vicinity of the rear edge 92. It follows that the pressure roller 18 is also in contact with the acceleration roller 16 for a correspondingly longer time. This means that the start for the acceleration of a sheet 8 always remains constant and only the end of acceleration and thus the total acceleration duration changes.

TeilelisteParts list

1
Papierzuführungsvorrichtung
2
Druckzylinder
3
Förderband
4
Antriebsrolle
5
Seitengestell
6
Bogenleitblech
7
Bogenleitblech
8
Bogen
9
Bohrung
10
Förderebene
11
Aussparung
12
Greifer
13
Lücke
14
Bogenanschlag
15
Greiferauflage
16
Beschleunigungsrolle
17
Mantel (16)
18
Andrückrollen
19
Ende (21)
20
Fotozelle
21
Hebel
22
Ende (21)
23
Außenrohr
24
Innenteil
25
-
26
Bohrungen
27
Hebel
28
Schlitze
29
Enden (27)
30
-
31
Vordermarken
32
Niederhalter
33
Ende (32)
34
Oberseite (8)
35
Steuerhebel
36
Steuerhebel
37
Ende (36)
38
Aufnahme (36)
39
Zugfeder
40
Ende (35)
41
Bolzen
42
Steuerrolle
43
Oberflächenbereich
44
Steuertrommel
45
Aufnahme
46
Paßfeder
47
Eintourenwelle
48
Ende (47)
49
Mitte (47)
50
Zugfeder
51
Ende (47)
52
Steuerkurve
53
Antriebsrad
54
Steuerrolle
55
Gurt
56
Ritzel
57
Welle (18)
58
Zahnrad
59
Hauptantrieb
60
-
61
Stellspindel
62
Teil (64)
63
Traverse
64
Gewinde
65
Oberseite (67)
66
Gewindebohrung
67
Stellelement
68
Boden (67)
69
Nabe
70
Unterseite (63)
71
Wälzlager
72
Kopf (61)
73
Ausnehmung (44)
74
Steuerlinie
75
Senkbohrung
76
Steuerlinie
77
Drehachse (44)
78
-
79
Schaltrelais
80
-
81
Elektromagnet
82
Schaltstange
83
Ende (82)
84
Ende (86)
85
-
86
Koppel
87
Ende (86)
88
Stellwelle
89
Blockiernocken
90
-
91
Vorderkante (44)
92
Hinterkante (44)


I Stellung
II Stellung

α Öffnungs- bzw. Schaltwinkel
β Schnittwinkel (74, 76)
1
Paper feed device
2nd
Pressure cylinder
3rd
Conveyor belt
4th
Drive roller
5
Side frame
6
Sheet baffle
7
Sheet baffle
8th
arc
9
drilling
10th
Funding level
11
Recess
12
Gripper
13
gap
14
Bow stop
15
Gripper pad
16
Acceleration role
17th
Coat (16)
18th
Pressure rollers
19th
End (21)
20th
Photocell
21st
lever
22
End (21)
23
Outer tube
24th
inner part
25th
-
26
Holes
27th
lever
28
Slits
29
Ends (27)
30th
-
31
Front brands
32
Hold-down
33
End (32)
34
Top (8)
35
Control lever
36
Control lever
37
End (36)
38
Recording (36)
39
Tension spring
40
End (35)
41
bolt
42
Tax role
43
Surface area
44
Control drum
45
admission
46
adjusting spring
47
Single tour wave
48
End (47)
49
Middle (47)
50
Tension spring
51
End (47)
52
Control curve
53
drive wheel
54
Tax role
55
belt
56
pinion
57
Wave (18)
58
gear
59
Main drive
60
-
61
Adjusting spindle
62
Part (64)
63
traverse
64
thread
65
Top (67)
66
Tapped hole
67
Actuator
68
Floor (67)
69
hub
70
Underside (63)
71
roller bearing
72
Head (61)
73
Recess (44)
74
Control line
75
Counterbore
76
Control line
77
Axis of rotation (44)
78
-
79
Switching relay
80
-
81
Electromagnet
82
Shift rod
83
End (82)
84
End (86)
85
-
86
Paddock
87
End (86)
88
Control shaft
89
Blocking cams
90
-
91
Leading edge (44)
92
Trailing edge (44)


I position
II position

α opening or switching angle
β cutting angle (74, 76)

Claims (6)

1. Device (1) for feeding sheets (8), which are aligned at front lay marks (31), to a sheet-processing machine, having a conveyor belt (3), a drivable accelerating roller (16) and a pressure roller (18), which cooperates cyclically with the accelerating roller (16) and is controllable by means of a control roller (42), with the cycle being determined by a drivable control drum (44), on which the control roller (42) rolls, characterised in that the control drum (44) has along its axis of rotation (77) a recess (73) with a continuously varying opening or operating angle (α), and that, along the axis of rotation (77), the control roller (42) may be brought into contact with all the surface regions (43) of the control drum (44).
2. Device according to claim 1, characterised in that the control drum (44) has a first control line (74) parallel to an axis of rotation (77) and a second control line (76) disposed, not parallel to, but at a uniform distance (r) from the axis of rotation (77), and that the two control lines (74, 76) or their extensions intersect at an acute angle (β).
3. Device according to claims 1 and 2, characterised in that the control drum (44) is disposed in an axially displaceable manner.
4. Device according to claims 1 to 3, characterised in that the control roller (42) is axially displaceable.
5. Device according to claims 1 to 4, characterised in that adjusting means (61, 67, 71, 72) are provided for axial displacement of the control drum (44).
6. Device according to claims 1 to 5, characterised in that a measuring element (20) is provided, which cooperates with a blocking mechanism (81, 82, 86, 89) for arresting the swivel movement of the pressure roller (18).
EP88115031A 1987-09-17 1988-09-14 Device for feeding sheets to a sheet-processing machine, particularly to a printing machine Expired - Lifetime EP0309815B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3731216 1987-09-17
DE19873731216 DE3731216A1 (en) 1987-09-17 1987-09-17 DEVICE FOR FEEDING SHEETS TO A SHEET PROCESSING MACHINE, IN PARTICULAR PRINTING MACHINE

Publications (3)

Publication Number Publication Date
EP0309815A2 EP0309815A2 (en) 1989-04-05
EP0309815A3 EP0309815A3 (en) 1989-05-03
EP0309815B1 true EP0309815B1 (en) 1991-07-17

Family

ID=6336210

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115031A Expired - Lifetime EP0309815B1 (en) 1987-09-17 1988-09-14 Device for feeding sheets to a sheet-processing machine, particularly to a printing machine

Country Status (6)

Country Link
US (1) US4892301A (en)
EP (1) EP0309815B1 (en)
JP (1) JPH01127536A (en)
CS (1) CS274479B2 (en)
DD (1) DD282438A5 (en)
DE (2) DE3731216A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8929365D0 (en) * 1989-12-30 1990-02-28 Alcatel Business Systems Article feeding
DE4414445A1 (en) * 1994-04-26 1995-11-09 Heidelberger Druckmasch Ag Tacting roll for transporting sheets into a sheet processing machine
DE4439092C2 (en) * 1994-11-02 1998-06-10 Heidelberger Druckmasch Ag Device for feeding sheets
JP4440146B2 (en) * 2005-03-10 2010-03-24 株式会社東芝 Image forming apparatus
JP4401986B2 (en) * 2005-03-10 2010-01-20 株式会社東芝 Image forming apparatus and sheet conveying method
JP4468844B2 (en) * 2005-03-10 2010-05-26 株式会社東芝 Image forming apparatus and sheet conveying method
JP4342461B2 (en) * 2005-03-10 2009-10-14 株式会社東芝 Image forming apparatus
JP4429939B2 (en) * 2005-03-10 2010-03-10 株式会社東芝 Image forming apparatus
JP2007333068A (en) * 2006-06-14 2007-12-27 Toyota Motor Corp Thermovalve
JP2009083476A (en) * 2007-09-13 2009-04-23 Komori Corp Guiding device of sheet-like matter
US11352482B2 (en) * 2017-02-09 2022-06-07 Nippon Paper Industries Co., Ltd. Rubber composition and method for producing same

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3630519A (en) * 1969-12-17 1971-12-28 Xerox Corp Document feed apparatus
CA940148A (en) * 1970-07-30 1974-01-15 Miller Printing Machinery Co. Apparatus for registering and feeding sheets to a sheet fed printing press
US3888129A (en) * 1974-02-21 1975-06-10 Illinois Tool Works Sheet acceleration and synchronization mechanism
CH641114A5 (en) * 1979-10-17 1984-02-15 Grapha Holding Ag BOW FEEDER.
DE3107807C2 (en) * 1981-02-28 1983-01-20 Georg Spiess Gmbh, 8906 Gersthofen Sheet accelerator
JPS58181536U (en) * 1982-05-31 1983-12-03 リョービ株式会社 Double-sided printing machine paper feed device
NL8503203A (en) * 1985-11-21 1987-06-16 Oce Nederland Bv DEVICE FOR TRANSPORTING A BUNDLE OF SHEETS.

Also Published As

Publication number Publication date
EP0309815A3 (en) 1989-05-03
US4892301A (en) 1990-01-09
JPH0559023B2 (en) 1993-08-30
DD282438A5 (en) 1990-09-12
EP0309815A2 (en) 1989-04-05
JPH01127536A (en) 1989-05-19
CS274479B2 (en) 1991-04-11
DE3731216A1 (en) 1989-04-13
DE3863736D1 (en) 1991-08-22
DE3731216C2 (en) 1989-07-13
CS619488A2 (en) 1990-09-12

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