EP0071769A1 - Device for preventing the curling-up of the front edges of sheets in a delivery apparatus for a rotary sheet-printing machine - Google Patents

Device for preventing the curling-up of the front edges of sheets in a delivery apparatus for a rotary sheet-printing machine Download PDF

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Publication number
EP0071769A1
EP0071769A1 EP82106104A EP82106104A EP0071769A1 EP 0071769 A1 EP0071769 A1 EP 0071769A1 EP 82106104 A EP82106104 A EP 82106104A EP 82106104 A EP82106104 A EP 82106104A EP 0071769 A1 EP0071769 A1 EP 0071769A1
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EP
European Patent Office
Prior art keywords
sheet
blowing
curling
leading edge
air flow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP82106104A
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German (de)
French (fr)
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EP0071769B1 (en
Inventor
Gerhard Pollich
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Heidelberger Druckmaschinen AG
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Heidelberger Druckmaschinen AG
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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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/24—Delivering or advancing articles from machines; Advancing articles to or into piles by air blast or suction apparatus
    • B65H29/245—Air blast devices
    • B65H29/246—Air blast devices acting on stacking devices
    • B65H29/247—Air blast devices acting on stacking devices blowing on upperside of the sheet
    • 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
    • B65H2406/10—Means using fluid made only for exhausting gaseous medium
    • B65H2406/12—Means using fluid made only for exhausting gaseous medium producing gas blast
    • B65H2406/122—Nozzles
    • B65H2406/1222—Nozzles adjustable impact angle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2801/00—Application field
    • B65H2801/03—Image reproduction devices
    • B65H2801/21—Industrial-size printers, e.g. rotary printing press

Definitions

  • the invention relates to a device in the delivery of sheet-fed rotary printing machines to counteract the curling of the leading edge of the sheet.
  • the curling of the sheet leading edge occurs immediately after the opening of the gripper which transports the sheet, which can lead to the corners of the sheet leading edge having already been rolled up before the paper sheet to be deposited comes to lie on the stack.
  • the result is a significant disturbance in the stack formation. This is all the more so if, on top of that, the printing speed is very high.
  • edge unrollers are used, which are characterized in that a guide surface is provided on which the web is guided on its web side facing away from the curling side and that a device is also provided for generating an air flow that rolls out the curling edge, which is on the curling side of the web is directed essentially parallel to the guide surface-outwards against the roll edge and extends in the direction of movement of the web along the roll edge over the guide surface.
  • this device is not suitable, if only because the paper sheets to be deposited cannot move past the blowing device down onto the stack.
  • the intended position of the blowing device 2 according to the invention can be seen from the side view or plan view of a sheet delivery 1 shown in FIGS. 1 and 2.
  • the sheet 3 coming from the last printing unit, not shown, is transported by means of the gripper 4 to its storage position above the stack 5 and then released.
  • the suction devices 6 arranged in the area of the trailing edge of the sheet brake the sheet 3, while the fans 7 arranged above the sheet 3 to be deposited accelerate the deposit by increasing the sinking speed.
  • blowing devices 2, 20 provided on both sides of the sheet 3 to be deposited are advantageously attached to the lateral sheet straight pushers 8 in the exemplary embodiments indicated. Arranged in the vicinity of the leading edge 9 of the sheet, as shown in FIGS. 1 and 2, these blow in the direction of sheet travel 10 and towards the center of the sheet and essentially parallel to the plane of the sheet.
  • FIG. 3 shows a first embodiment of the blowing device 2 according to the invention.
  • a holding bracket 13 is fastened to the lateral straight-line thrusters 8 by means of corresponding fastening means 11, 12.
  • the housing block 14 is attached as an essential part of the blowing device 2 by means of retaining screws 15.
  • the air supply regulating shut-off valve 17 is screwed into a threaded bore 16 of the housing block 14.
  • the hose 18 connected to it establishes the connection to the blown air source, not shown.
  • the air outlet bores 19 incorporated into the housing block 14 open into the threaded bore 16 and, together with this, ensure the desired guidance of the blown air flow 20.
  • FIG. 4 The side view of the device according to FIG. 3 shown in FIG. 4 serves to clarify the construction.
  • FIGS. 5 and 6 show a side view and a top view of a further design option for the blowing device 21 according to the invention.
  • the same is arranged on both sides of the paper sheet 3 on the side sheet straight pushers 8 (see FIGS. 1 and 2).
  • the housing block 22 is designed somewhat differently (circular in cross section) and is provided with a threaded pin 23. This protrudes through a longitudinal groove 24 attached to the lateral straight bend 8 and thus enables the rotation of the housing block 22 about its longitudinal axis 25 as well as a longitudinal displacement in or against the direction of sheet travel 10 be produced between the blowing device 21 and the lateral straight bend 8.
  • the second configuration option is particularly suitable if the adjustability of the blowing direction and the distance of the blowing device 21 from the leading edge 9 of the sheet is considered useful.
  • the curling of the leading edge 9 of the sheet can be prevented from being stretched under the action of the blowing air flow 20, the effective blowing air flow 20 having a certain scattering area 28, particularly in the plane parallel to the sheet plane.

Abstract

Die Erfindung betrifft eine Einrichtung in der Auslage von Bogenrotationsdruckmaschinen, um dem Einrollen der Bogenvorderkante (9) entgegenwirken zu können. Besagte Rollneigung ist insbesondere bei mehrfarbig bedruckten und unter Umständen im letzten Druckwerk noch lackierten Papierbogen stark ausgeprägt und hat zum Teil erhebliche Störungen bei der Stapelbildung zur Folge. Wie ersichtlich, wird dieser Erscheinung nun dadurch entgegengewirkt, daß im in Bogenlaufrichtung (10) vorderen Bereich des Stapels (5) in der Nähe der Bogenvorderkante (9) des abzulegenden Bogens (3) Blaseinrichtungen (2,21) vorgesehen sind, über die jeweils ein gesteuerter Blasluftstrom (20) mit einer Richtungskomponente in Bogenlaufrichtung (10) und einer weiteren gegen die Bogenmitte hin derart auf den Bogen (3) gerichtet ist, daß dabei die Unterseite des absinkenden Bogens (3) im Bereich der sich einrollenden Bogenvorderkante (9) beaufschlagt wird.The invention relates to a device in the delivery of sheet-fed rotary printing machines in order to be able to counteract the curling in of the leading edge of the sheet (9). Said curl is particularly pronounced in the case of paper sheets printed in multicolor and possibly still varnished in the last printing unit, and in some cases has considerable disturbances in stack formation. As can be seen, this phenomenon is now counteracted by the fact that blowing devices (2, 21) are provided in the front region of the stack (5) in the direction of sheet travel (10) in the vicinity of the leading edge (9) of the sheet to be deposited (3) a controlled blast air flow (20) with a directional component in the sheet running direction (10) and another towards the sheet center is directed towards the sheet (3) such that the underside of the sinking sheet (3) in the area of the curling sheet leading edge (9) is applied.

Description

Die Erfindung betrifft eine Einrichtung in der Auslage von Bogenrotationsdruckmaschinen, um dem Einrollen der Bogenvorderkante entgegenwirken zu können.The invention relates to a device in the delivery of sheet-fed rotary printing machines to counteract the curling of the leading edge of the sheet.

Durch den einseitigen Farbauftrag auf einen Papierbogen erhält dieser eine von der Bogenvorder- bzw. Hinterkante ausgehende Rollneigung. Dieser Erscheinung kann man im wesentlichen mit sogenannten Bogenentrollern begegnen, welche für gewöhnlich ebenfalls in der Bogenauslage hinter der letzten Umführtrommel angeordnet sind. Diese Einrichtungen, bei denen meist zwischen zwei sich über die gesamte Bogenbreite erstreckende Rundstäbe und zwischen beiden ebenfalls über die gesamte Breite des Bogens wirkende Saugluft zur Anwendung kommt, sorgen in den meisten Fällen dafür, daß der bedruckte Papierbogen nahezu eben und ohne eingerollte Enden in die Bogenauslage gelangt.The one-sided application of ink to a sheet of paper gives it a tendency to curl from the leading or trailing edge of the sheet. This phenomenon can be countered essentially with so-called trollers, which are usually also arranged in the sheet delivery behind the last transfer drum. These devices, in which suction air is usually used between two round bars extending across the entire sheet width and between the two also across the entire width of the sheet, ensure in most cases that the printed paper sheet is almost flat and without curled ends in the Sheet delivery arrives.

Insbesondere aber bei mehrfarbig bedruckten und unter Umständen im letzten Druckwerk noch lackierten Papierbogen kann die Rollneigung allerdings derart ausgeprägt sein, daß es trotz vorgesehener Bogenentroller zum Einrollen der Bogenvorderkante kommt. Im übrigen benötigt auch ein noch so günstig positonierter Bogenentroller eine meßbare Ansaugzeit, so daß eine geschwindigkeitsabhängige Länge des Bogens von der Vorderkante aus noch zum Einrollen neigt. Selbst mittels Blasluft den Bogen zusätzlich auf den Bogenentroller zu blasen, bringt besonders bei mehrfarbig bedruckten und eventuell lackierten Papierbogen nicht den gewünschten Erfolg.In particular, however, in the case of paper sheets printed in multicolor and possibly still varnished in the last printing unit, the tendency to curl can be so pronounced that the leading edge of the sheet curls in spite of the sheet decelerator provided. In addition, a sheet trolley, however favorable it is positioned, requires a measurable suction time, so that a speed-dependent length of the sheet still tends to curl up from the front edge. Even blowing the sheet onto the sheet unroller by means of blowing air does not bring the desired success, especially with paper sheets that are printed in several colors and possibly coated.

Gemäß der Arbeitsweise der Bogenausleger tritt das Einrollen der Bogenvorderkante unmittelbar nach dem Öffnen der die Bogen transportierenden Greifer auf, was dazu führen kann, daß gerade die Ecken der Bogenvorderkante bereits eingerollt sind, bevor der abzulegende Papierbogen auf dem Stapel zu liegen kommt. Die Folge ist eine erhebliche Störung bei der Stapelbildung. Dies umso mehr, wenn obendrein mit einer recht hohen Druckgeschwindigkeit gearbeitet wird.According to the operation of the sheet delivery, the curling of the sheet leading edge occurs immediately after the opening of the gripper which transports the sheet, which can lead to the corners of the sheet leading edge having already been rolled up before the paper sheet to be deposited comes to lie on the stack. The result is a significant disturbance in the stack formation. This is all the more so if, on top of that, the printing speed is very high.

In Anbetracht dieser Problematik soll nun eine Einrichtung geschaffen werden, welche gegenüber den bisherigen Lösungsversuchen nun zuverlässig, auch unter extremen Betriebsbedingungen dem Einrollen der Bogenvorderkante des abzulegenden Bogens nach dessen Freigabe durch die Greifer entgegenwirkt. Erfindungsgemäß wird dies dadurch erreicht, daß im, in Bogenlaufrichtung vorderen Bereich des Stapels in der Nähe der Bogenvorderkante des abzulegenden Bogens Blaseinrichtungen vorgesehen sind, über die jeweils ein gesteuerter Blasluftstrom mit einer Richtungskomponenten in Bogenlaufrichtung und einer weiteren gegen die Bogenmitte hin derart auf den Bogen gerichtet ist, daß dabei die Unterseite des absinkenden Bogens im Bereich der sich einrollenden Bogenvorderkante beaufschlagt wird.In view of this problem, a device is now to be created which, compared to previous attempts at solution, reliably counteracts, even under extreme operating conditions, the curling in of the leading edge of the sheet to be deposited after its release by the grippers. According to the invention, this is achieved in that in the front of the stack in the direction of the sheet in the vicinity of the sheet leading edge of the sheet to be blown blowing devices are provided, via which in each case a controlled blast air flow with one directional component in the sheet running direction and another directed towards the sheet center towards the sheet is that the underside of the sinking sheet is acted upon in the area of the curling sheet leading edge.

An sich ist schon bekannt (DE-PS 24 59 862), bei laufenden Warenbahnen, beispielsweise textilen Geweben oder. Gewirken, Kunststoffolien, Papier usw. die Warenkanten zu glätten und auszurollen, wenn sie sich quer zur Bahn unter entsprechender Verringerung der Bahnbreite aus der Bahnebene heraus auf die eine oder andere Bahnseite umgebogen oder umgelegt insbesondere eingerollt haben. Dabei kommen Kantenausroller zur Anwendung, welche dadurch gekennzeichnet sind, daß eine Führungsfläche vorgesehen ist, an der die Warenbahn auf ihrer der Einrollseite abgewandten Bahnseite geführt ist und daß weiterhin eine Einrichtung zur Erzeugung eines die Rollkante ausrollenden Luftstromes vorgesehen ist, welcher auf der Einrollseite der Warenbahn im wesentlichen parallel zur Führungsfläche-nach außen gegen die Rollkante gerichtet ist und sich in Bewegungsrichtung der Warenbahn längs der Rollkante über die Führungsfläche erstreckt.As such, it is already known (DE-PS 24 59 862) when webs are running, for example textile fabrics or. Knitted fabrics, plastic films, paper, etc. to smooth and roll out the product edges if they have bent or folded, in particular rolled up, across the web with a corresponding reduction in the web width from the web level to one or the other web side. Here, edge unrollers are used, which are characterized in that a guide surface is provided on which the web is guided on its web side facing away from the curling side and that a device is also provided for generating an air flow that rolls out the curling edge, which is on the curling side of the web is directed essentially parallel to the guide surface-outwards against the roll edge and extends in the direction of movement of the web along the roll edge over the guide surface.

Um allerdings der Rollneigung von Papierbogen in der Auslage von Bogenrotationsdruckmaschinen entgegenwirken zu können, ist diese Einrichtung nicht geeignet, allein schon deshalb, weil dabei die abzulegenden Papierbogen sich nicht an der Blaseinrichtung vorbei nach unten auf den Stapel bewegen können.However, in order to counteract the tendency of paper sheets to curl in the delivery of sheet-fed rotary printing presses, this device is not suitable, if only because the paper sheets to be deposited cannot move past the blowing device down onto the stack.

Zwei Ausführungsformen der erfindungsgemäßen Einrichtung sind im folgenden anhand der Zeichnungen dargestellt.Two embodiments of the device according to the invention are shown below with reference to the drawings.

Dabei zeigt:

  • Fig. 1 eine Seitenansicht eines Bogenauslegers, aus der die Position der erfindungsgemäßen Einrichtung ersichtlich ist,
  • Fig. 2 die Draufsicht der Einrichtung nach Figur 1, aus der darüber hinaus die bevorzugte Blasrichtung der erfindungsgemäßen Einrichtung hervorgeht,
  • Fig. 3 eine vergrößerte Darstellung der erfindungsgemäßen Blaseinrichtung aus der Ansicht nach Fig. 2,
  • Fig. 4 eine Seitenansicht der Einrichtung nach Figur 3,
  • Fig. 5 eine weitere Ausführungsform der Blaseinrichtung sowie
  • Fig. 6 die Draufsicht der Ausführungsform nach Fig. 5.
It shows:
  • 1 is a side view of a sheet boom, from which the position of the device according to the invention can be seen,
  • 2 shows the top view of the device according to FIG. 1, from which the preferred blowing direction of the device according to the invention also emerges,
  • 3 is an enlarged view of the blowing device according to the invention from the view of FIG. 2,
  • 4 shows a side view of the device according to FIG. 3,
  • Fig. 5 shows another embodiment of the blowing device and
  • 6 shows the top view of the embodiment according to FIG. 5.

Aus der in den Figuren 1 und 2 dargestellten Seitenansicht bzw. Draufsicht eines Bogenauslegers 1 ist die vorgesehene Position der erfindungsgemäßen Blaseinrichtung 2 ersichtlich.The intended position of the blowing device 2 according to the invention can be seen from the side view or plan view of a sheet delivery 1 shown in FIGS. 1 and 2.

Der von dem nicht dargestellten letzten Druckwerk kommende Bogen 3 wird mittels Greifer 4 bis zu seiner Ablageposition oberhalb des Stapels 5 transportiert und danach freigegeben. Die im Bereich der Bogenhinterkante angeordneten Saugeinrichtungen 6 bremsen den Bogen 3 ab, während die oberhalb des abzulegenden Bogens 3 angeordneten Ventilatoren 7 die Ablage beschleunigen, indem sie die Sinkgeschwindigkeit erhöhen.The sheet 3 coming from the last printing unit, not shown, is transported by means of the gripper 4 to its storage position above the stack 5 and then released. The suction devices 6 arranged in the area of the trailing edge of the sheet brake the sheet 3, while the fans 7 arranged above the sheet 3 to be deposited accelerate the deposit by increasing the sinking speed.

Die zu beiden Seiten des abzulegenden Bogens 3 vorgesehenen Blaseinrichtungen 2,20 sind in den angegebenen Ausführungsbeispielen vorteilhafterweise an den seitlichen Bogengeradstoßern 8 angebracht. In der Nähe der Bogenvorderkante .9 angeordnet, blasen diese wie aus den Figuren 1 und 2 ersichtlich, in Bogenlaufrichtung 10 sowie gegen die Bogenmitte hin und im wesentlichen parallel zur Bogenebene.The blowing devices 2, 20 provided on both sides of the sheet 3 to be deposited are advantageously attached to the lateral sheet straight pushers 8 in the exemplary embodiments indicated. Arranged in the vicinity of the leading edge 9 of the sheet, as shown in FIGS. 1 and 2, these blow in the direction of sheet travel 10 and towards the center of the sheet and essentially parallel to the plane of the sheet.

Figur 3 zeigt eine erste Ausführungsform der erfindungsgemäßen Blaseinrichtung 2. Dabei ist an den seitlichen Bogengeradstoßern 8 mittels entsprechender Befestigungsmittel 11,12 ein Haltebügel 13 befestigt. An diesem wiederum ist der Gehäuseblock 14 als wesentlicher Bestandteil der Blaseinrichtung 2 über Halteschrauben 15 befestigt. In eine Gewindebohrung 16 des Gehäuseblockes 14 ist das die Luftzufuhr regulierende Absperrventil 17 eingeschraubt. Der daran angeschlossene Schlauch 18 stellt die Verbindung zur nichtdargestellten Blasluftquelle her. Die in den Gehäuseblock 14 eingearbeiteten Luftaustrittsboh-rungen 19 münden in die Gewindebohrung 16 und sorgen zusammen mit dieser für die gewünschte Führung des Blasluftstromes 20.FIG. 3 shows a first embodiment of the blowing device 2 according to the invention. In this case, a holding bracket 13 is fastened to the lateral straight-line thrusters 8 by means of corresponding fastening means 11, 12. On this in turn, the housing block 14 is attached as an essential part of the blowing device 2 by means of retaining screws 15. The air supply regulating shut-off valve 17 is screwed into a threaded bore 16 of the housing block 14. The hose 18 connected to it establishes the connection to the blown air source, not shown. The air outlet bores 19 incorporated into the housing block 14 open into the threaded bore 16 and, together with this, ensure the desired guidance of the blown air flow 20.

Die in Figur 4 dargestellte Seitenansicht der Einrichtung gemäß Figur 3 dient der Verdeutlichung des konstruktiven Aufbaus.The side view of the device according to FIG. 3 shown in FIG. 4 serves to clarify the construction.

Die Figuren 5 und 6 zeigen in Seitenansicht bzw. Draufsicht eine weitere Ausgestaltungsmöglichkeit der erfindungsgemäßen Blaseinrichtung 21. Auch hier wiederum ist dieselbe zu beiden Seiten des Papierbogens 3 an den seitlichen Bogengeradstoßern 8 angeordnet (siehe Fig. 1 und 2). Die wesentlichen Unterschiede zur Ausführungsform gemäß Figuren 3 und 4 besteht darin, daß der Gehäuseblock 22 etwas anders gestaltet (im Querschnitt kreisförmig) sowie mit einem Gewindezapfen 23 versehen ist. Dieser ragt durch eine, am seitlichen Bogengeradstoßer 8 angebrachte Längsnut 24 hindurch und ermöglicht somit die Drehung des Gehäuseblockes 22 um seine Längsachse 25 als auch eine Längsverschiebung in bzw. gegen Bogenlaufrichtung 10. Ist die gewählte Einstellung erreicht, so kann mittels Feststellschraube 26 die feste Verbindung zwischen Blaseinrichtung 21 und seitlichem Bogengeradstoßer 8 hergestellt werden.FIGS. 5 and 6 show a side view and a top view of a further design option for the blowing device 21 according to the invention. Here again, the same is arranged on both sides of the paper sheet 3 on the side sheet straight pushers 8 (see FIGS. 1 and 2). The main differences from the embodiment according to FIGS. 3 and 4 are that the housing block 22 is designed somewhat differently (circular in cross section) and is provided with a threaded pin 23. This protrudes through a longitudinal groove 24 attached to the lateral straight bend 8 and thus enables the rotation of the housing block 22 about its longitudinal axis 25 as well as a longitudinal displacement in or against the direction of sheet travel 10 be produced between the blowing device 21 and the lateral straight bend 8.

Die zweite Ausgestaltungsmöglichkeit eignet sich dann in bevorzugter Weise, wenn die Einstellbarkeit der Blasrichtung sowie des Abstandes der Blaseinrichtung 21 von der Bogenvorderkante 9 für sinnvoll erachtet wird.The second configuration option is particularly suitable if the adjustability of the blowing direction and the distance of the blowing device 21 from the leading edge 9 of the sheet is considered useful.

Mit beiden Ausgestaltungsmöglichkeiten kann das Einrollen der Bogenvorderkante 9 dahingehend verhindert werden, daß selbige unter Einwirkung des Blasluftstromes 20 gestreckt wird, wobei der wirksame Blasluftstrom 20 besonders in der zur Bogenebene parallelen Ebene einen gewissen Streubereich 28 aufweist.With both design options, the curling of the leading edge 9 of the sheet can be prevented from being stretched under the action of the blowing air flow 20, the effective blowing air flow 20 having a certain scattering area 28, particularly in the plane parallel to the sheet plane.

Auf die Zufuhr der Blasluft zu den Blaseinrichtungen sowie die Steuerung von Menge und Wirkungsdauer derselben ist in der Beschreibung und in den Zeichnungen nicht näher eingegangen worden. Dabei dürfte die Steuerung der Luftmenge in Abhängigkeit vom Bedruckstoff (z.B. mittels Drosselventil) -dem Fachmann keine Schwierigkeiten bereiten.The supply of the blowing air to the blowing devices and the control of the amount and duration of action thereof have not been discussed in detail in the description and in the drawings. Controlling the amount of air depending on the substrate (e.g. using a throttle valve) should not pose any difficulties for the specialist.

Weiterhin ist es ohne weiteres möglich, beispielsweise über ein Drehventil, den Blasluftstrom dahingehend zu steuern, daß dieser in einem begrenzten, für die Funktion der Blaseinrichtung aber für ausreichend erachteten Zeitintervall wirkt.Furthermore, it is readily possible, for example via a rotary valve, to control the blown air flow in such a way that it acts within a limited time interval, which is considered sufficient for the function of the blower device.

TEILELISTEPARTS LIST

  • 1 Bogenausleger1 sheet boom
  • 2 Blaseinrichtung2 blowing device
  • 3 Bogen3 sheets
  • 4 Greifer4 grippers
  • 5 Stapel5 stacks
  • 6 Saugeinrichtung6 suction device
  • 7 Ventilatoren7 fans
  • 8 Bogengeradstoßer8 straight benders
  • 9 Bogenvorderkante9 leading edge of sheet
  • 10 Bogenlaufrichtung10 direction of sheet travel
  • 11 Befestigungsschraube11 fastening screw
  • 12 Mutter12 mother
  • 13 Haltebügel13 retaining bracket
  • 14 Gehäuseblock14 housing block
  • 15 Halteschrauben15 retaining screws
  • 16 Gewindebohrung16 threaded hole
  • 17 Absperrventil17 shut-off valve
  • 18 Schlauch18 hose
  • 19 Luftaustrittsbohrungen19 air outlet holes
  • 20 Blasluftstrom20 blow air flow
  • 21 Blaseinrichtung21 blowing device
  • 22 Gehäuseblock22 housing block
  • 23 Gewindezapfen23 threaded pin
  • 24 Längsnut24 longitudinal groove
  • 25 Längsachse25 longitudinal axis
  • 26 Feststellschraube26 locking screw
  • 27 abgeschrägter Bereich27 beveled area
  • 28 Streubereich28 Scattering area

Claims (8)

1. Einrichtung in der Auslage von Bogenrotationsdruckmaschinen, um dem Einrollen der Bogenvorderkante (9) entgegenzuwirken,
dadurch gekennzeichnet,
daß im, in Bogenlaufrichtung (10) vorderen Bereich des Stapels (5) in der Nähe der Bogenvorderkante (9) des abzulegenden Bogens (3) Blaseinrichtungen (2,21) vorgesehen sind, über die jeweils ein gesteuerter Blasluftstrom (20) mit einer Richtungskomponenten in Bogenlaufrichtung (10) und einer weiteren gegen die Bogenmitte hin derart auf den Bogen (3) gerichtet ist, daß dabei die Unterseite des absinkenden Bogens (3) im Bereich der sich einrollenden Bogenvorderkante (9) beaufschlagt wird.1. device in the delivery of sheet-fed rotary printing machines in order to counteract the curling of the leading edge of the sheet (9),
characterized,
that blowing means (2, 21) are provided in the front region of the stack (5) in the direction of sheet travel (10) in the vicinity of the front edge of the sheet (9) of the sheet (3) to be deposited, via each of which a controlled blowing air flow (20) with a directional component is directed towards the sheet (3) in the direction of sheet travel (10) and another towards the sheet center in such a way that the underside of the sinking sheet (3) is acted upon in the area of the curling sheet leading edge (9). 2. Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß die Blasrichtung im wesentlichen parallel zur Bogenebene ist, und der Blasluftstrom (20) insbesondere in der Bogenebene einen gewissen Streubereich (28) aufweist.2. Device according to claim 1,
characterized,
that the blowing direction is substantially parallel to the plane of the arc, and the blowing air flow (20) has a certain scattering range (28), in particular in the plane of the arc. 3. Einrichtung nach Anspruch 1,
dadurch gekennzeichnet,
daß der Blasluftstrom (20) kontinuierlich oder in regelmäßigen, der Bogenablagegeschwindigkeit angepaßten Zeitintervallen wirken kann.3. Device according to claim 1,
characterized,
that the blown air stream (20) can act continuously or at regular intervals adapted to the sheet depositing speed. 4. Einrichtung nach einem oder mehreren der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die Blaseinrichtung (2,21) zur Erzeugung des Blasluftstromes (20) aus einem mit einer Gewindebohrung (16) und Luftaustrittsbohrungen (19) versehenen Gehäuseblock (14,22) besteht, bei welchem über Schlauchanschluß (18) und Absperrventil (17) die Luftzufuhr erfolgt und der mittels Befestigungsmittel (11,12,15,26) an den seitlichen Bogengeradstoßern (8) befestigt ist. ,4. Device according to one or more of claims 1 to 3,
characterized,
that the blowing device (2,21) for generating the blowing air flow (20) consists of a housing block (14, 22) provided with a threaded bore (16) and air outlet bores (19), in which the hose connection (18) and shut-off valve (17) Air is supplied and which is fastened by means of fastening means (11, 12, 15, 26) to the lateral curve straight pushers (8). , 5. Einrichtung nach Anspruch 4,
dadurch gekennzeichnet,
daß der zylindrische Gehäuseblock (14) im Querschnitt im wesentlichen rechteckig ausgeführt ist, wobei an einer Seite über Halteschrauben (15) ein Haltebügel (13) befestigt ist, der über Befestigungsschraube (11) sowie Mutter (12) die Verbindung zum seitlichen Bogengeradstoßer (8) herstellt und in einem abgeschrägten Bereich (27) dieser Rechteckseite die Luftaustrittsbohrungen (19) angeordnet sind.5. Device according to claim 4,
characterized,
that the cylindrical housing block (14) in cross section essentially is rectangular, with a retaining bracket (13) attached on one side via retaining screws (15), which creates the connection to the lateral straight bend pusher (8) via the fastening screw (11) and nut (8) and in a bevelled area (27) of the latter Rectangular side, the air outlet holes (19) are arranged. 6. Einrichtung nach Anspruch 4, dadurch gekennzeichnet, daß der zylindrische Gehäuseblock (22) im Querschnitt kreisförmig ausgeführt ist und über einen Gewindezapfen (23) verfügt, welcher durch eine am seitlichen Bogengeradstoßer (8) angebrachte Längsnut (24) ragt und über eine Feststellschraube (26) die formschlüssige Verbindung zum seitlichen Bogengeradstoßer (8) herstellt.6. Device according to claim 4, characterized in that the cylindrical housing block (22) is circular in cross section and has a threaded pin (23) which protrudes through a longitudinal groove (24) attached to the lateral straight bend pusher (8) and via a locking screw (26) produces the positive connection to the lateral straight bend pusher (8). 7. Einrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß die Blaseinrichtung (21) in der Längsnut (24) des seitlichen Bogengeradstoßers (8) in oder gegen Bogenlaufrichtung (10) verschiebbar und feststellbar ist.7. Device according to claim 6,
characterized,
that the blowing device (21) in the longitudinal groove (24) of the lateral sheet straight pusher (8) in or against the sheet travel direction (10) is displaceable and lockable. 8. Einrichtung nach Anspruch 6,
dadurch gekennzeichnet,
daß die Blaseinrichtung (21) um ihre Längsachse (25) schwenkbar und feststellbar ist.8. Device according to claim 6,
characterized,
that the blowing device (21) about its longitudinal axis (25) is pivotable and lockable.
EP82106104A 1981-08-01 1982-07-08 Device for preventing the curling-up of the front edges of sheets in a delivery apparatus for a rotary sheet-printing machine Expired EP0071769B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19813130623 DE3130623A1 (en) 1981-08-01 1981-08-01 DEVICE IN THE DISPLAY OF ARC ROTATION PRINTING MACHINES TO COUNTER THE ROLLING IN OF THE ARC FRONT EDGE
DE3130623 1981-08-01

Publications (2)

Publication Number Publication Date
EP0071769A1 true EP0071769A1 (en) 1983-02-16
EP0071769B1 EP0071769B1 (en) 1985-09-18

Family

ID=6138436

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82106104A Expired EP0071769B1 (en) 1981-08-01 1982-07-08 Device for preventing the curling-up of the front edges of sheets in a delivery apparatus for a rotary sheet-printing machine

Country Status (5)

Country Link
US (1) US4561645A (en)
EP (1) EP0071769B1 (en)
JP (1) JPS5831831A (en)
AT (1) AT384583B (en)
DE (1) DE3130623A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4702468A (en) * 1981-08-01 1987-10-27 Heidelberger Druckmaschinen Ag Device in the delivery of sheet-fed rotary printing machine for exhibiting curl formation on the leading edge of a delivered sheet
DE3535113A1 (en) * 1985-10-02 1987-04-23 Jagenberg Ag BOW DEPOSIT
DE3634400A1 (en) * 1986-10-09 1988-04-14 Heidelberger Druckmasch Ag BOW BOOM ON ROTARY PRINTING MACHINES
JP2503118Y2 (en) * 1989-06-22 1996-06-26 株式会社小森コーポレーション Paper ejection device for sheet-fed printing press
FR2656571B1 (en) * 1989-12-29 1992-05-07 Oce Graphics France DEVICE FOR SECONDARY GUIDANCE OF A PRINTING MEDIUM ON A DRAWING MACHINE.
US5324024A (en) * 1991-04-24 1994-06-28 Ricoh Company, Ltd. Paper discharging apparatus
US5357327A (en) * 1992-04-06 1994-10-18 Xerox Corporation Sheet decurling system including cross-curl
US5153662A (en) * 1992-04-06 1992-10-06 Xerox Corporation Sheet decurling apparatus
US5201514A (en) * 1992-04-06 1993-04-13 Xerox Corporation Apparatus for decurling a sheet
DE29906505U1 (en) * 1999-04-13 1999-08-26 Roland Man Druckmasch Boom for a sheet-fed rotary printing machine
US7726649B2 (en) * 2005-06-07 2010-06-01 Xerox Corporation Air drag cooler for sheet transport apparatus
JP2007261804A (en) * 2006-03-30 2007-10-11 Mitsubishi Heavy Ind Ltd Discharging device for sheet printer
JP4970127B2 (en) * 2007-04-27 2012-07-04 デュプロ精工株式会社 Paper receiving device
JP5783164B2 (en) * 2012-03-02 2015-09-24 株式会社リコー Paper discharge device and image forming system

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US1465385A (en) * 1919-07-12 1923-08-21 Hall Printing Press Company Sheet-delivery mechanism
US1623195A (en) * 1923-07-07 1927-04-05 George E Maxner Apparatus for piling sheets of paper
US1902436A (en) * 1931-08-03 1933-03-21 Herman L Joachim Method of and apparatus for stacking sheets
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GB1018965A (en) * 1962-06-29 1966-02-02 Jagenberg Werke Ag Improvements in and apparatus for depositing a stream of over-lapping sheets in a stack
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US4131320A (en) * 1974-06-11 1978-12-26 Bertin & Cie Conveyor device for letters, cards or other thin article

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GB284911A (en) * 1927-05-19 1928-02-09 George Edward Maxner Improvements in apparatus for piling sheets of paper and other light material successively delivered thereto
US1743921A (en) * 1927-12-17 1930-01-14 Claybourn Process Corp Method of drying freshly-printed sheets and apparatus therefor
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JPS5589154A (en) * 1978-12-28 1980-07-05 Tokyo Ink Kk Blowing device of air between sheet
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US1465385A (en) * 1919-07-12 1923-08-21 Hall Printing Press Company Sheet-delivery mechanism
US1623195A (en) * 1923-07-07 1927-04-05 George E Maxner Apparatus for piling sheets of paper
US1902436A (en) * 1931-08-03 1933-03-21 Herman L Joachim Method of and apparatus for stacking sheets
US2299259A (en) * 1940-09-09 1942-10-20 Miehle Printing Press & Mfg Sheet delivery means
DE842647C (en) * 1950-08-26 1952-06-30 Maschf Augsburg Nuernberg Ag Delivery device for sheet-fed printing machines
DE1148241B (en) * 1958-12-15 1963-05-09 Linotype Machinery Ltd Sheet offsets for printing machines
GB1018965A (en) * 1962-06-29 1966-02-02 Jagenberg Werke Ag Improvements in and apparatus for depositing a stream of over-lapping sheets in a stack
US4131320A (en) * 1974-06-11 1978-12-26 Bertin & Cie Conveyor device for letters, cards or other thin article
DE2459862B1 (en) * 1974-12-18 1976-02-19 Erhardt & Leimer Kg Edge roller for smoothing rolled edges or the like on running webs

Also Published As

Publication number Publication date
JPS5831831A (en) 1983-02-24
EP0071769B1 (en) 1985-09-18
ATA281882A (en) 1987-05-15
AT384583B (en) 1987-12-10
JPS6311262B2 (en) 1988-03-12
DE3130623A1 (en) 1983-02-10
US4561645A (en) 1985-12-31

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