EP1935820B1 - Sheet processing machine with sheet brake device and method for cleaning a sheet brake device - Google Patents

Sheet processing machine with sheet brake device and method for cleaning a sheet brake device Download PDF

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Publication number
EP1935820B1
EP1935820B1 EP07121391.2A EP07121391A EP1935820B1 EP 1935820 B1 EP1935820 B1 EP 1935820B1 EP 07121391 A EP07121391 A EP 07121391A EP 1935820 B1 EP1935820 B1 EP 1935820B1
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EP
European Patent Office
Prior art keywords
sheet
cleaning
braking
suction
processing machine
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.)
Active
Application number
EP07121391.2A
Other languages
German (de)
French (fr)
Other versions
EP1935820A2 (en
EP1935820A3 (en
Inventor
Reinhard Lappok
Peter Dr. Palmen
Guido Zanders
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Heidelberger Druckmaschinen AG
Original Assignee
Heidelberger Druckmaschinen AG
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Publication date
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Publication of EP1935820A2 publication Critical patent/EP1935820A2/en
Publication of EP1935820A3 publication Critical patent/EP1935820A3/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
    • B65H29/00—Delivering or advancing articles from machines; Advancing articles to or into piles
    • B65H29/68—Reducing the speed of articles as they advance
    • B65H29/686—Pneumatic brakes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/015—Means for holding or positioning work for sheet material or piles of sheets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/01—Means for holding or positioning work
    • B26D7/018—Holding the work by suction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26D—CUTTING; DETAILS COMMON TO MACHINES FOR PERFORATING, PUNCHING, CUTTING-OUT, STAMPING-OUT OR SEVERING
    • B26D7/00—Details of apparatus for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D7/08—Means for treating work or cutting member to facilitate cutting
    • B26D7/088—Means for treating work or cutting member to facilitate cutting by cleaning or lubricating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B26—HAND CUTTING TOOLS; CUTTING; SEVERING
    • B26F—PERFORATING; PUNCHING; CUTTING-OUT; STAMPING-OUT; SEVERING BY MEANS OTHER THAN CUTTING
    • B26F1/00—Perforating; Punching; Cutting-out; Stamping-out; Apparatus therefor
    • B26F1/38—Cutting-out; Stamping-out
    • B26F1/40—Cutting-out; Stamping-out using a press, e.g. of the ram type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2301/00—Handling processes for sheets or webs
    • B65H2301/50—Auxiliary process performed during handling process
    • B65H2301/53—Auxiliary process performed during handling process for acting on performance of handling machine
    • B65H2301/531—Cleaning parts of handling machine
    • 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
    • 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
    • B65H2406/35—Other elements with suction surface, e.g. plate or wall
    • B65H2406/351—Other elements with suction surface, e.g. plate or wall facing the surface of the handled material
    • 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
    • B65H2406/40—Fluid power drive; Fluid supply elements
    • B65H2406/42—Distribution circuits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65H—HANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H2701/00—Handled material; Storage means
    • B65H2701/10—Handled articles or webs
    • B65H2701/17—Nature of material
    • B65H2701/176—Cardboard
    • B65H2701/1762—Corrugated
    • 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
    • B65H2801/42—Die-cutting

Definitions

  • the invention relates to a sheet-processing machine with Bogenbrems- and stretching device according to the preamble of claim 1 and a method for cleaning the same according to the preamble of claim 4.
  • Sheet processing machines usually have a feeder, work stations, and a boom.
  • the sheet-processing machine may be, for example, sheet-fed presses or, in particular, further-processing machines, such as sheet punching and embossing machines.
  • From a stack of sheets in the feeder an uppermost sheet is separated and transferred to a transport system.
  • the transport system transports the sheet through the processing station to the delivery.
  • a well-known transport system in sheet punching and embossing machines are, for example, rotating gripper carriage. These each consist of a cross bar, are attached to the gripper, with which the sheet is gripped at its front edge and the ends are attached to a lateral chain hoist, which guides the gripper carriage through the machine.
  • gripper carriages are also used for sheet guiding, while the sheets are guided through the printing units by means of drums with gripper gripping system.
  • the sheet For the delivery of sheets in sheet processing machines and, for example, for processing in further processing machines, the sheet must be braked to a standstill. This happens on the one hand by braking the gripper carriage and also by sheet brakes.
  • Such a flat bed punch is for example from the DE 30 44 083 A1 known.
  • the two tables are equipped with cutting and scoring tools or corresponding counter tools with which punched out of the cyclically guided between the table surface sheets the benefits and at the same time pressed the necessary for clean folding grooves. In the subsequent breakout the waste is removed by machine tools. Depending on the equipment of the machine finally the punched benefits can be separated in a designatedWhentrenn arthritis.
  • the sheet must be braked from transport speed to standstill. Since the weakened from the previous blank sheet arrives at high speed in the stations, the sole deceleration of the front gripper bar can cause a postponement of its rear part. This should be done by additional Braking devices, which act on the surface of the sheet can be prevented.
  • the streamlined sheet can be edited with higher accuracy and stored better.
  • the DE 695 00 514 T2 shows, for example, a sheet brake device with brushes.
  • the brake brushes are aligned obliquely to the sheet transport direction and exercise by applying a light braking force on the bow.
  • the disadvantage is that this can cause marks on the sheet.
  • pneumatic sheet brakes are used, such as from DE 102 59 556 A1 and the US 3,972,523 A known. These are also in the immediate vicinity of the sheet and provide a negative pressure, which acts as a braking force on the moving past the pneumatic sheet brake arc.
  • Pneumatic sheet brakes have the advantage over mechanical sheet brakes that the sheet surface is not affected, and markings can be avoided.
  • the problem with pneumatic sheet brakes is that paper dust and powder settles in their pipes, channels and openings.
  • the transport and thus the processing speed of the sheet-processing machine can be reduced. This results in lower productivity. If the speed is not further reduced, or the full functionality of the brake despite reduced speed due to very heavy pollution is no longer guaranteed, the sheet brake must be cleaned. Since the cleaning must be done in machine downtime, thereby productivity is considerably reduced.
  • Object of the present invention is therefore to provide a mark-free sheet brake, which allows a higher machine productivity by reducing the machine downtime due to sheet brake cleaning.
  • This object is achieved by a pneumatic sheet brake with the features of claim 1 and a method for cleaning such a sheet brake according to claim 4.
  • An inventive sheet processing machine has at least one processing station.
  • a sheet punching and embossing machine for example, at least one stamping station and stamping station, breaking station and blanking station are present.
  • the transport system can be designed as a circulating chain system, are guided by the gripper bars.
  • the gripper bars have grippers which grasp the sheets at their leading edge and thus pull through the machine.
  • pneumatic sheet braking and stretching devices are located in the inlet area of the stations.
  • stripping station and depaneling station the devices are embedded directly in the tool or counter tool frame. As a result, the devices are in a plane parallel and at a minimum distance from the plane in which the sheets are transported by the conveyor through the processing stations, a so-called sheet conveying plane.
  • a sheet braking device in a plane parallel and in close proximity to the sheet conveying plane. Since the grippers release the bow in this station, it is particularly necessary to additionally decelerate the bow.
  • suction holes in the sheet braking and stretching device.
  • the sheets are moved by the transport system directly over the suction openings. If a vacuum prevails at the suction openings, the sheets moving over them are sucked in, thereby braked and at the same time stretched.
  • the Bogenbrems- and stretching device has a cleaning device. This has advantageously at least one port B, which can be acted upon with blown air and which is in communication with the Saugluftkanalsystem the Bogenbrems- and -straffvorraum and thus indirectly with the suction openings and the vacuum generators.
  • the port B of the device for cleaning the sheet braking and stretching device is acted upon with blowing air.
  • the blown air is blown into the suction air duct system and through the suction openings, thereby dissolving dirt particles and transporting them outwards. Due to the design, the vacuum generators are hardly cleaned.
  • port A of the vacuum generator and port B of the device for cleaning the Bogenbrems- and -stretching device simultaneously subjected to blowing air.
  • this has a control in which the above-described methods are deposited as cleaning programs and by which the means for cleaning the Bogenbrems- and - tightening device activated, ie, the admission of the connections can be controlled with blown air. Activation is carried out automatically at each machine standstill, for which a short cleaning program with a duration of several seconds is stored in the control. Another deposited multi-minute Cleaning program, which can be activated manually, is used for intensive cleaning of the device.
  • FIG. 1 the basic structure of a sheet punching and embossing machine 100 for punching, breaking and depositing sheets of paper, cardboard and the like is shown.
  • the punching and embossing machine 100 has a feeder 1, a punching station 2, a breaking station 3 and a boom 4, which are supported and enclosed by a common machine housing 5.
  • the sheets 6 are separated by a feeder 1 from a stack and fed and gripped by mounted on revolving chains 7 rapiers 8 at its front edge and intermittently pulled through the various stations 2, 3 and 4 of the punching and embossing machine 100 therethrough.
  • the punching station 2 consists of a lower table 9 and an upper table 10.
  • the lower table 9 is fixedly mounted in the machine frame and provided with a counter plate to the punching knife.
  • the upper table 10 is supported vertically movable back and forth.
  • the gripper bar 8 transports the sheet 6 from the punching and embossing station 2 in the subsequent Ausbrechstation 3, which is equipped with breakout tools.
  • the breaking station 3 the unwanted pieces of waste are pushed out of the sheet 6 downwards with the aid of the stripping tools, whereby the waste pieces 11 fall into a container-like carriage 12 inserted below the station.
  • the boom 4 may also include a pallet 13 on which the individual sheets are stacked in the form of a stack 14, so that after reaching a certain stack height, the pallets stacked with the Bows 14 can be moved away from the area of the punching and embossing machine 100.
  • the chains 7 carry a plurality of gripper bars 8, for example. Here are 8, so that multiple sheets 6 can be processed simultaneously in the various stations 2, 3 and 4.
  • the sheet punching and embossing machine has a machine control 15 with control panel and display.
  • this controller 15 By this controller 15 and the Bogenbrems- and -strreckvorraum is driven.
  • a pneumatic sheet braking and stretching device 20 is shown.
  • the mounting plate 24, which is part of the Bogenbrems- and -recking device 20 has holes for screwing the device with the tool frame of the processing stations 3, 4 of the sheet punching and embossing machine 100.
  • the sheet brake and -stretching device 20 has two ports, a port A, via which the vacuum generator 22 can be acted upon with a blown air b, and a port B of the device for cleaning the Bogenbrems- and -stretching device 20, which can also be acted upon with a blown air b.
  • An arc 6, which is to be braked and stretched by the Bogenbrems- and -strreckvortechnisch 20 is for Veranschlauichung the sheet position relative to Bogenbrems- and -strreckvortechnisch 20 in Fig. 2a and 2 B shown. For clarity, grab lines 8 were not shown.
  • Fig. 2b is the air flow through the Saugluftkanalsystem 23 and the suction openings 21 indicated by arrows.
  • the Saug povertykanalsystem 23 serves to connect the suction openings 21 with the vacuum generators 22 and is in the sectional views Fig. 2c and Fig. 2d represented by the Bogenbrems- and stretching device.
  • the connection A of the vacuum generator 22 is acted upon by a blown air b.
  • the blown air b flows through the vacuum generator 22, whereby a negative pressure is generated due to the Venturi effect, which is provided via the Saugluftkanalsystem 23 at the suction ports 21. Due to the negative pressure, air is sucked into the suction openings 21 and this suction air s sucks a sheet 6 moved over it and brakes it.
  • Fig. 3a shows the Bogenbrems- and stretching device 20 with the air guide in cleaning the device.
  • the Bogenbrems- and stretching device 20 is then cleaned when the punching and embossing machine 100 is not in operation, so if no sheet 6 is to be braked.
  • the connection B of the device for cleaning the Bogenbrems- and -stretching device 20 is acted upon by a blown air b. Via a channel 25, the blowing air b is passed into the Saugluftkanalsystem 23, blows this and thereby removes dust and dirt particles. The blowing air escapes through the suction openings 21.
  • the port B of the device for cleaning the Bogenbrems- and -strreckvorides 20 and the terminal A of the vacuum generator 22 can be acted upon simultaneously with a blown air b (in Fig. 3a not shown).
  • vacuum generator, Saugluftkanalsystem and suction openings of a blast air b flows through and cleaned.
  • the connection of the terminal B of the device for cleaning the Bogenbrems- and -strreckvortechnisch 20 to the Saugluftkanalsystem 23 is in the sectional view Fig. 3b
  • a channel 25 connects port B and suction ports 21.

Description

Die Erfindung betrifft eine Bogenbearbeitungsmaschine mit Bogenbrems- und streckvorrichtung gemäß dem Oberbegriff von Anspruch 1 und ein Verfahren zur Reinigung derselben gemäß dem Oberbegriff von Anspruch 4.The invention relates to a sheet-processing machine with Bogenbrems- and stretching device according to the preamble of claim 1 and a method for cleaning the same according to the preamble of claim 4.

Stand der TechnikState of the art

Bogenbearbeitende Maschinen besitzen gewöhnlich einen Anleger, Bearbeitungsstationen und einen Ausleger. Bei der Bogen bearbeitenden Maschine kann es sich beispielsweise um Bogendruckmaschinen oder insbesondere Weiterverarbeitungsmaschinen wie Bogenstanz- und -prägemaschinen handeln. Von einem im Anleger befindlichen Bogenstapel wird ein zuoberst liegender Bogen vereinzelt und an ein Transportsystem übergeben. Das Transportsystem transportiert den Bogen durch die Bearbeitungsstation bis zur Auslage. Ein bekanntes Transportsystem bei Bogenstanz- und Prägemaschinen sind beispielsweise umlaufende Greiferwagen. Diese bestehen jeweils aus einer Querstange, an der Greifer angebracht sind, mit welchen der Bogen an seinem Vorderrand ergriffen wird und deren Enden an einem seitlichen Kettenzug befestigt sind, der die Greiferwagen durch die Maschine führt.
Im Auslegerbereich von Bogendruckmaschinen kommen ebenfalls Greiferwagen zur Bogenführung zum Einsatz, während die Bogen durch die Druckwerke mittels Trommeln mit Zangengreifersystem geführt werden.
Zur Auslage von Bogen in Bogen bearbeitenden Maschinen und beispielsweise zur Bearbeitung in Weiterverarbeitungsmaschinen muss der Bogen bis zum Stillstand abgebremst werden. Dies geschieht zum einen durch Abbremsen der Greiferwagen als auch zusätzlich durch Bogenbremsen.Sheet processing machines usually have a feeder, work stations, and a boom. The sheet-processing machine may be, for example, sheet-fed presses or, in particular, further-processing machines, such as sheet punching and embossing machines. From a stack of sheets in the feeder, an uppermost sheet is separated and transferred to a transport system. The transport system transports the sheet through the processing station to the delivery. A well-known transport system in sheet punching and embossing machines are, for example, rotating gripper carriage. These each consist of a cross bar, are attached to the gripper, with which the sheet is gripped at its front edge and the ends are attached to a lateral chain hoist, which guides the gripper carriage through the machine.
In the delivery area of sheet-fed presses, gripper carriages are also used for sheet guiding, while the sheets are guided through the printing units by means of drums with gripper gripping system.
For the delivery of sheets in sheet processing machines and, for example, for processing in further processing machines, the sheet must be braked to a standstill. This happens on the one hand by braking the gripper carriage and also by sheet brakes.

Als Stanzen wird das Schneiden mit in sich geschlossenen geometrischen Zuschnittsformen bezeichnet, die kreisförmig, oval oder mehreckig sowie Phantasieformen aller Art sein können. Auch die in der Druckweiterverarbeitung geübten Praktiken, wie Stanzen mit Locheisen, Eckenabstoßen und Registerstanzen werden zu diesem Bereich gezählt. Die Stanzung erfolgt gegen eine Stanzunterlage oder gegen Stempel, teilweise sind es auch Schervorgänge (vg. Druckweiterverarbeitung, Ausbildungsleitfaden für Buchbinder, Bundesverband Druck e. V. 1996, S. 351 ff. ). Verpackungsmaterialien aus Papier, Karton, Pappe oder Wellpappe werden hauptsächlich im Bogenformat gestanzt. Beim Stanzvorgang können zusätzlich aber auch Rilllinien oder Blindprägungen in den Nutzen eingebracht werden. Dieser komplexe Prozess macht es unabdingbar, die Bogen einzeln zu stanzen. Da es sich bei den Endprodukten um anspruchsvolle Verpackungen hinsichtlich technischer und graphischer Ausführung handelt (etwa Verpackungen für Kosmetik, Zigaretten, Pharmazie, Lebensmittel, etc.), werden besondere Anforderungen nicht nur an die Verpackungsmaterialien selbst gestellt, sondern es sind für optimale Resultate auch Stanzwerkzeuge mit geringsten Toleranzen und äußerst präzise und zuverlässig arbeitende Stanzmaschinen erforderlich. Diesen Ansprüchen wird das Flachbettstanzen am besten gerecht. Dabei werden die gedruckten und auf einer Palette gestapelten Bogen der Stanzmaschine zugeführt. In der Maschine werden in einer Ausrichteinrichtung die zu stanzenden Bogen passgenau ausgerichtet, von einem Greiferwagen übernommen und exakt in der Stanzeinrichtung zwischen einem fest gelagerten Untertisch und einem über einen Kniehebel oder Exzentergetriebe vertikal bewegbaren Obertisch positioniert.As punching the cutting is referred to with closed geometric blank forms that can be circular, oval or polygonal and imaginary shapes of all kinds. Also the practices practiced in print finishing, such as punching with punch, corner punching and register punching are counted to this area. The punching takes place against a punching pad or against stamp, partially there are also shearing operations (vg., print finishing, training guide for Buchbinder, Bundesverband Druck e. V. 1996, p. 351 ff. ). Packaging materials made of paper, cardboard, cardboard or corrugated board are mainly punched in sheet format. When punching but also creasing lines or blind embossing can be introduced into the benefit. This complex process makes it indispensable to punch the sheets individually. Since the end products are sophisticated packaging in terms of technical and graphic design (such as packaging for cosmetics, cigarettes, pharmacy, food, etc.), special requirements are not only placed on the packaging materials themselves, but are also punching tools for optimum results required with the smallest tolerances and extremely precise and reliable punching machines. Flatbed punching best meets these demands. The printed sheets stacked on a pallet are fed to the punching machine. In the machine, the sheets to be punched are precisely aligned in an alignment device, taken over by a gripper carriage and positioned exactly in the punching device between a fixed undercounter and a vertical over a knee lever or eccentric upper table.

Eine derartige Flachbettstanze ist beispielsweise aus der DE 30 44 083 A1 bekannt. Die beiden Tische sind mit Schneid- und Rillwerkzeugen bzw. entsprechenden Gegenwerkzeugen bestückt, mit denen aus dem taktweise zwischen die Tischfläche geführten Bögen die Nutzen ausgestanzt und gleichzeitig die zum sauberen Falten notwendigen Rillen eingedrückt werden. In der nachfolgenden Ausbrecheinrichtung wird der Abfall über Ausbrechwerkzeuge maschinell entfernt. Je nach Ausstattung der Maschine können schließlich die gestanzten Nutzen in einer hierfür vorgesehenen Nutzentrenneinrichtung separiert werden.Such a flat bed punch is for example from the DE 30 44 083 A1 known. The two tables are equipped with cutting and scoring tools or corresponding counter tools with which punched out of the cyclically guided between the table surface sheets the benefits and at the same time pressed the necessary for clean folding grooves. In the subsequent breakout the waste is removed by machine tools. Depending on the equipment of the machine finally the punched benefits can be separated in a designated Nutzentrenneinrichtung.

Sowohl in der Ausbrechstation als auch in der Nutzentrennstation mit Bogenauslage muss der Bogen von der Transportgeschwindigkeit bis zum Stillstand abgebremst werden. Da der vom vorhergehenden Zuschnitt geschwächte Bogen mit hoher Geschwindigkeit in den Stationen eintrifft, kann die alleinige Verlangsamung der vorderen Greiferstange ein Aufschieben seines hinteren Teils hervorrufen. Dies soll durch zusätzliche Bremsvorrichtungen, welche auf die Fläche des Bogens wirken, verhindert werden. Der gestraffte Bogen kann mit höherer Genauigkeit bearbeitet und besser abgelegt werden.Both in the stripping station and in the blanking station with sheet delivery, the sheet must be braked from transport speed to standstill. Since the weakened from the previous blank sheet arrives at high speed in the stations, the sole deceleration of the front gripper bar can cause a postponement of its rear part. This should be done by additional Braking devices, which act on the surface of the sheet can be prevented. The streamlined sheet can be edited with higher accuracy and stored better.

Aus dem Stand der Technik sind zwei verschiedene Bogenbremsvorrichtungstypen bekannt. Die DE 695 00 514 T2 zeigt beispielsweise eine Bogenbremsvorrichtung mit Bürsten. Die Bremsbürsten sind schräg zur Bogentransportrichtung ausgerichtet und üben durch leichten Druck eine Bremskraft auf den Bogen aus. Nachteilig ist, dass dadurch Markierungen auf den Bogen entstehen können.Two different types of sheet brake devices are known in the art. The DE 695 00 514 T2 shows, for example, a sheet brake device with brushes. The brake brushes are aligned obliquely to the sheet transport direction and exercise by applying a light braking force on the bow. The disadvantage is that this can cause marks on the sheet.

In einer alternativen Lösung zu dieser mechanischen Bogenbremse kommen pneumatische Bogenbremsen zum Einsatz, wie z.B. aus der DE 102 59 556 A1 und der US 3,972,523 A bekannt. Diese befinden sich ebenfalls in direkter Nähe des Bogens und stellen einen Unterdruck bereit, welcher als Bremskraft auf die sich an der pneumatischen Bogenbremse vorbei bewegenden Bogen wirkt. Pneumatische Bogenbremsen haben gegenüber mechanischen Bogenbremsen den Vorteil, dass die Bogenoberfläche nicht beeinträchtigt wird, und Markierungen so vermieden werden können. Problematisch an pneumatischen Bogenbremsen ist allerdings, dass sich in deren Leitungen, Kanälen und Öffnungen Papierstaub und Puder absetzt.In an alternative solution to this mechanical sheet brake pneumatic sheet brakes are used, such as from DE 102 59 556 A1 and the US 3,972,523 A known. These are also in the immediate vicinity of the sheet and provide a negative pressure, which acts as a braking force on the moving past the pneumatic sheet brake arc. Pneumatic sheet brakes have the advantage over mechanical sheet brakes that the sheet surface is not affected, and markings can be avoided. The problem with pneumatic sheet brakes, however, is that paper dust and powder settles in their pipes, channels and openings.

Die notwendige Reinigung der pneumatischen Bogenbremse geschieht nach dem Stand der Technik durch manuelles Reinigen mit Pinsel, Bürsten, Streifen und / oder Druckluftpistolen. Um die Reinigung von Bogenbremsen zu beschleunigen und zu vereinfachen, wurde zum einen die Formgebung von Kanälen, Unterdruckkammern und Düsen optimiert, als auch die Demontage der einzelnen Komponenten der Bogenbremse vereinfacht, wie z. B. in der DE 30 15 796 C2 gezeigt. Trotz dieser Bemühungen setzt sich Staub in der Bogenbremse ab, und zeitaufwendige Reinigungspausen sind die Folge.The necessary cleaning of the pneumatic sheet brake is done according to the prior art by manual cleaning with a brush, brushes, strips and / or compressed air guns. To speed up and simplify the cleaning of sheet brakes, on the one hand the design of channels, vacuum chambers and nozzles has been optimized, as well as the disassembly of the individual components of the sheet brake simplified, such. B. in the DE 30 15 796 C2 shown. Despite these efforts, dust settles in the sheet brake, and time-consuming cleaning pauses are the result.

Um die Funktionalität der Bremse trotz Verschmutzung zu gewährleisten, kann die Transport- und damit die Bearbeitungsgeschwindigkeit der Bogenbearbeitenden Maschine reduziert werden. Dies hat eine geringere Produktivität zur Folge. Soll die Geschwindigkeit nicht weiter verringert werden, oder ist die volle Funktionalität der Bremse trotz reduzierter Geschwindigkeit aufgrund von sehr starker Verschmutzung nicht mehr gewährleistet, muss die Bogenbremse gereinigt werden. Da die Reinigung bei Maschinenstillstand geschehen muss, wird die Produktivität hierdurch beträchtlich verringert.To ensure the functionality of the brake despite contamination, the transport and thus the processing speed of the sheet-processing machine can be reduced. This results in lower productivity. If the speed is not further reduced, or the full functionality of the brake despite reduced speed due to very heavy pollution is no longer guaranteed, the sheet brake must be cleaned. Since the cleaning must be done in machine downtime, thereby productivity is considerably reduced.

Aufgabe der vorliegenden Erfindung ist es nun, eine markierungsfreie Bogenbremse zu schaffen, welche eine höhere Maschinenproduktivität ermöglicht durch eine Reduzierung der Maschinenstillstandzeiten aufgrund von Bogenbremsenreinigung. Gelöst wird diese Aufgabe durch eine pneumatische Bogenbremse mit den Merkmalen von Anspruch 1 und ein Verfahren zur Reinigung einer solchen Bogenbremse nach Anspruch 4.Object of the present invention is therefore to provide a mark-free sheet brake, which allows a higher machine productivity by reducing the machine downtime due to sheet brake cleaning. This object is achieved by a pneumatic sheet brake with the features of claim 1 and a method for cleaning such a sheet brake according to claim 4.

Eine erfindungsgemäße Bogenbearbeitungsmaschine besitzt mindestens eine Bearbeitungsstation. Bei einer Bogenstanz- und -prägemaschine sind beispielsweise mindestens eine Stanzstation und Prägestation, Ausbrechstation und Nutzentrennstation vorhanden. Durch einen Bogenanleger werden die Bogen vereinzelt und dem Transportsystem zugeführt, welches die Bogen durch die Maschine transportiert. Das Transportsystem kann als umlaufendes Kettensystem ausgebildet sein, durch das Greiferstangen geführt werden. Die Greiferstangen besitzen Greifer, welche die Bogen an ihrer Vorderkante ergreifen und somit durch die Maschine ziehen. Um den Bogen in den Bearbeitungsstationen besser abbremsen und in gestrecktem Zustand bearbeiten zu können, befinden sich im Einlaufbereich der Stationen pneumatische Bogenbrems- und - streckvorrichtungen. In Ausbrechstation und Nutzentrennstation sind die Vorrichtungen direkt in den Werkzeug- oder Gegenwerkzeugrahmen eingelassen. Dadurch befinden sich die Vorrichtungen in einer Ebene parallel und in minimalem Abstand zur Ebene, in welcher die Bogen von der Fördereinrichtung durch die Bearbeitungsstationen transportiert werden, einer so genannten Bogenförderebene.An inventive sheet processing machine has at least one processing station. In a sheet punching and embossing machine, for example, at least one stamping station and stamping station, breaking station and blanking station are present. By a sheet feeder, the sheets are separated and fed to the transport system, which transports the sheets through the machine. The transport system can be designed as a circulating chain system, are guided by the gripper bars. The gripper bars have grippers which grasp the sheets at their leading edge and thus pull through the machine. In order to better brake the sheet in the processing stations and to be able to work in the stretched state, pneumatic sheet braking and stretching devices are located in the inlet area of the stations. In stripping station and depaneling station, the devices are embedded directly in the tool or counter tool frame. As a result, the devices are in a plane parallel and at a minimum distance from the plane in which the sheets are transported by the conveyor through the processing stations, a so-called sheet conveying plane.

Auch im Ausleger befindet sich eine Bogenbremsvorrichtung in einer Ebene parallel und in unmittelbarer Nähe zur Bogenförderebene. Da die Greifer den Bogen in dieser Station freigeben, ist es besonders notwendig, den Bogen zusätzlich abzubremsen.Also in the boom is a sheet braking device in a plane parallel and in close proximity to the sheet conveying plane. Since the grippers release the bow in this station, it is particularly necessary to additionally decelerate the bow.

In der Bogenbrems- und -streckvorrichtung befinden sich Saugöffnungen. Die Bogen werden von dem Transportsystem direkt über die Saugöffnungen hinweg bewegt. Wenn an den Saugöffnungen ein Unterdruck herrscht, werden die sich darüber hinweg bewegenden Bogen angesaugt, dadurch abgebremst und gleichzeitig gestreckt.There are suction holes in the sheet braking and stretching device. The sheets are moved by the transport system directly over the suction openings. If a vacuum prevails at the suction openings, the sheets moving over them are sucked in, thereby braked and at the same time stretched.

Um an den Saugöffnungen einen Unterdruck bereitzustellen, werden nach dem Venturi-Prinzip arbeitende Unterdruckerzeuger über einen Anschluss A mit Blasluft beaufschlagt und der erzeugte Unterdruck wird über ein Saugluftkanalsystem an die Saugöffnungen übertragen. Um Unterdruckerzeuger, Saugluftkanalsystem und Saugöffnungen einfach und schnell reinigen zu können, besitzt die Bogenbrems- und streckvorrichtung eine Reinigungseinrichtung. Diese besitzt in vorteilhafter Weise mindestens einen Anschluss B, der mit Blasluft beaufschlagt werden kann und der in Verbindung steht mit dem Saugluftkanalsystem der Bogenbrems- und -straffvorrichtung und damit mittelbar mit den Saugöffnungen und den Unterdruckerzeugern.In order to provide a negative pressure at the suction openings, working under the Venturi principle vacuum generator via a port A with blowing air and the negative pressure generated is transmitted via a Saugluftkanalsystem to the suction ports. In order to clean vacuum generator, Saugluftkanalsystem and suction openings easily and quickly, the Bogenbrems- and stretching device has a cleaning device. This has advantageously at least one port B, which can be acted upon with blown air and which is in communication with the Saugluftkanalsystem the Bogenbrems- and -straffvorrichtung and thus indirectly with the suction openings and the vacuum generators.

Soll die Bogenbrems- und -streckvorrichtung von Staub gereinigt werden, so wird der Anschluss B der Einrichtung zur Reinigung der Bogenbrems- und streckvorrichtung mit Blasluft beaufschlagt. Mittels Kanälen wird die Blasluft in das Saugluftkanalsystem und durch die Saugöffnungen geblasen und löst dabei Schmutzpartikel und transportiert diese nach außen. Konstruktionsbedingt werden dabei die Unterdruckerzeuger kaum gereinigt.If the sheet braking and stretching device to be cleaned of dust, the port B of the device for cleaning the sheet braking and stretching device is acted upon with blowing air. By means of ducts, the blown air is blown into the suction air duct system and through the suction openings, thereby dissolving dirt particles and transporting them outwards. Due to the design, the vacuum generators are hardly cleaned.

Deshalb wird in einem alternativen Verfahren Anschluss A der Unterdruckerzeuger und Anschluss B der Einrichtung zur Reinigung der Bogenbrems- und -streckvorrichtung gleichzeitig mit Blasluft beaufschlagt.Therefore, in an alternative method, port A of the vacuum generator and port B of the device for cleaning the Bogenbrems- and -stretching device simultaneously subjected to blowing air.

Besonders vorteilhaft ist es, diese beiden Verfahren in der beschriebenen Weise nacheinander durchzuführen. Dadurch wird der Reinigungseffekt verstärkt.It is particularly advantageous to carry out these two processes in succession in the manner described. This enhances the cleaning effect.

In einer vorteilhaften Ausführungsform der Bogenbearbeitenden Maschine besitzt diese eine Steuerung, in welcher die oben beschriebenen Verfahren als Reinigungsprogramme hinterlegt sind und durch welche die Einrichtung zur Reinigung der Bogenbrems- und - straffvorrichtung aktiviert, d. h., die Beaufschlagung der Anschlüsse mit Blasluft geregelt werden kann. Die Aktivierung erfolgt praktischer Weise automatisch bei jedem Maschinenstillstand, wozu ein Kurz-Reinigungsprogramm mit einer Dauer von mehreren Sekunden in der Steuerung hinterlegt ist. Ein weiteres hinterlegtes mehrminütiges Reinigungsprogramm, welches manuell aktiviert werden kann, dient einer Intensivreinigung der Vorrichtung.
Hinsichtlich weiterer vorteilhafter Ausgestaltungen der Erfindung wird auf die Unteransprüche sowie die Beschreibung eines Ausführungsbeispiels unter Bezugnahme auf die beiliegenden Zeichnungen verwiesen.In an advantageous embodiment of the sheet-processing machine this has a control in which the above-described methods are deposited as cleaning programs and by which the means for cleaning the Bogenbrems- and - tightening device activated, ie, the admission of the connections can be controlled with blown air. Activation is carried out automatically at each machine standstill, for which a short cleaning program with a duration of several seconds is stored in the control. Another deposited multi-minute Cleaning program, which can be activated manually, is used for intensive cleaning of the device.
With regard to further advantageous embodiments of the invention, reference is made to the dependent claims and the description of an embodiment with reference to the accompanying drawings.

Ausführungsbeispielembodiment

Die Erfindung soll an Hand eines Ausführungsbeispiels noch näher erläutert werden. Es zeigen in schematischer Darstellung

Fig. 1
eine erfindungsgemäße Bogenbearbeitungsmaschine
Fig. 2a
eine Ansicht einer pneumatischen Bogenbrems- und -streckvorrichtung
Fig. 2b
eine Draufsicht einer pneumatischen Bogenbrems- und -streckvorrichtung mit Luftführung im Betrieb
Fig. 2c
eine Detailansicht im Bereich eines Unterdruckerzeugers als Schnittdarstellung entlang IIc-IIc in Fig. 2b
Fig. 2d
eine Detailansicht im Bereich des Anschlusses A als Schnittdarstellung entlang IId-IId in Fig. 2b
Fig. 3a
eine Draufsicht einer pneumatischen Bogenbrems- und -streckvorrichtung mit Luftführung bei Reinigung
Fig. 3b
eine Detailansicht im Bereich des Anschlusses B als Schnittdarstellung entlang IIIb-IIIb in Fig. 3a
The invention will be explained in more detail with reference to an embodiment. It show in a schematic representation
Fig. 1
an inventive sheet processing machine
Fig. 2a
a view of a pneumatic Bogenbrems- and stretching device
Fig. 2b
a plan view of a pneumatic Bogenbrems- and -strreckvorrichtung with air duct in operation
Fig. 2c
a detailed view in the region of a vacuum generator as a sectional view along IIc-IIc in Fig. 2b
Fig. 2d
a detailed view in the region of the terminal A as a sectional view along IId-IId in Fig. 2b
Fig. 3a
a plan view of a pneumatic Bogenbrems- and -strreckvorrichtung with air guide during cleaning
Fig. 3b
a detailed view in the region of the terminal B as a sectional view along IIIb-IIIb in Fig. 3a

In Figur 1 ist der prinzipielle Aufbau einer Bogenstanz- und -prägemaschine 100 zum Stanzen, Ausbrechen und Ablegen von Bögen aus Papier, Pappe und dergleichen dargestellt. Die Stanz- und Prägemaschine 100 besitzt einen Anleger 1, eine Stanzstation 2, eine Ausbrechstation 3 und einen Ausleger 4, die von einem gemeinsamen Maschinengehäuse 5 getragen und umschlossen werden.In FIG. 1 the basic structure of a sheet punching and embossing machine 100 for punching, breaking and depositing sheets of paper, cardboard and the like is shown. The punching and embossing machine 100 has a feeder 1, a punching station 2, a breaking station 3 and a boom 4, which are supported and enclosed by a common machine housing 5.

Die Bögen 6 werden durch einen Anleger 1 von einem Stapel vereinzelt und zugeführt und von auf umlaufenden Ketten 7 befestigten Greiferstangen 8 an ihrer Vorderkante ergriffen und intermittierend durch die verschiedenen Stationen 2, 3 und 4 der Stanz- und Prägemaschine 100 hindurch gezogen.The sheets 6 are separated by a feeder 1 from a stack and fed and gripped by mounted on revolving chains 7 rapiers 8 at its front edge and intermittently pulled through the various stations 2, 3 and 4 of the punching and embossing machine 100 therethrough.

Die Stanzstation 2 besteht aus einem Untertisch 9 und einem Obertisch 10. Der Untertisch 9 ist fest im Maschinengestell gelagert und mit einer Gegenplatte zum Stanzmesser versehen. Der Obertisch 10 ist vertikal hin- und her bewegbar gelagert.The punching station 2 consists of a lower table 9 and an upper table 10. The lower table 9 is fixedly mounted in the machine frame and provided with a counter plate to the punching knife. The upper table 10 is supported vertically movable back and forth.

Die Greiferstange 8 transportiert den Bogen 6 von der Stanz- und Prägestation 2 in die nachfolgende Ausbrechstation 3, die mit Ausbrechwerkzeugen ausgestattet ist. In der Ausbrechstation 3 werden mit Hilfe der Ausbrechwerkzeuge die nicht benötigten Abfallstücke aus dem Bogen 6 nach unten herausgestoßen, wodurch die Abfallstücke 11 in einen unter der Station eingeschobenen behälterartigen Wagen 12 fallen. Im Einlaufbereich der Ausbrechstation 3 befindet sich eine Bogenbrems- und -straffvorrichtung 20.The gripper bar 8 transports the sheet 6 from the punching and embossing station 2 in the subsequent Ausbrechstation 3, which is equipped with breakout tools. In the breaking station 3, the unwanted pieces of waste are pushed out of the sheet 6 downwards with the aid of the stripping tools, whereby the waste pieces 11 fall into a container-like carriage 12 inserted below the station. In the inlet area of the breaking station 3 is a Bogenbrems- and -straffvorrichtung 20th

Von der Ausbrechstation 3 gelangt der Bogen in den Ausleger 4, wo der Bogen entweder nur einfach abgelegt wird, oder aber gleichzeitig eine Trennung der einzelnen Nutzen erfolgt. Im Einlaufbereich des Auslegers 4 befindet sich eine Bogenbrems- und - straffvorrichtung 20. Der Ausleger 4 kann auch eine Palette 13 enthalten, auf der die einzelnen Bögen in Form eines Stapels 14 aufgestapelt werden, so dass nach Erreichen einer bestimmten Stapelhöhe die Paletten mit den aufgestapelten Bögen 14 aus dem Bereich der Stanz- und Prägemaschine 100 weggefahren werden können.From the stripping station 3, the sheet enters the boom 4, where the sheet is either simply stored, or at the same time there is a separation of the individual benefits. The boom 4 may also include a pallet 13 on which the individual sheets are stacked in the form of a stack 14, so that after reaching a certain stack height, the pallets stacked with the Bows 14 can be moved away from the area of the punching and embossing machine 100.

Wie zu erkennen ist, tragen die Ketten 7 mehrere Greiferstangen 8, bspw. sind es hier 8, so dass mehrere Bögen 6 gleichzeitig in den verschiedenen Stationen 2, 3 und 4 bearbeitet werden können.As can be seen, the chains 7 carry a plurality of gripper bars 8, for example. Here are 8, so that multiple sheets 6 can be processed simultaneously in the various stations 2, 3 and 4.

Zu ihrer Bedienung und Steuerung besitzt die Bogenstanz- und -prägemaschine eine Maschinensteuerung 15 mit Bedienpult und Anzeige. Durch diese Steuerung 15 wird auch die Bogenbrems- und -streckvorrichtung angesteuert.For their operation and control, the sheet punching and embossing machine has a machine control 15 with control panel and display. By this controller 15 and the Bogenbrems- and -strreckvorrichtung is driven.

In Fig. 2a ist eine pneumatische Bogenbrems- und -streckvorrichtung 20 dargestellt. Das Befestigungsblech 24, welches Teil der Bogenbrems- und -streckvorrichtung 20 ist, besitzt Löcher zur Verschraubung der Vorrichtung mit den Werkzeugrahmen der Bearbeitungsstationen 3, 4 der Bogenstanz- und -prägemaschine 100. Die Bogenbrems-und -streckvorrichtung 20 besitzt zwei Anschlüsse, einen Anschluss A, über den die Unterdruckerzeuger 22 mit einer Blasluft b beaufschlagt werden können, und einen Anschluss B der Einrichtung zur Reinigung der Bogenbrems- und -streckvorrichtung 20, der ebenfalls mit einer Blasluft b beaufschlagt werden kann.In Fig. 2a a pneumatic sheet braking and stretching device 20 is shown. The mounting plate 24, which is part of the Bogenbrems- and -recking device 20 has holes for screwing the device with the tool frame of the processing stations 3, 4 of the sheet punching and embossing machine 100. The sheet brake and -stretching device 20 has two ports, a port A, via which the vacuum generator 22 can be acted upon with a blown air b, and a port B of the device for cleaning the Bogenbrems- and -stretching device 20, which can also be acted upon with a blown air b.

Ein Bogen 6, welcher durch die Bogenbrems- und -streckvorrichtung 20 gebremst und gestreckt werden soll, ist zur Veranschlaulichung der Bogenposition relativ zur Bogenbrems- und -streckvorrichtung 20 in Fig. 2a und 2b dargestellt. Zur besseren Übersichtlichkeit wurden Greiferstrangen 8 nicht dargestellt.An arc 6, which is to be braked and stretched by the Bogenbrems- and -strreckvorrichtung 20, is for Veranschlauichung the sheet position relative to Bogenbrems- and -strreckvorrichtung 20 in Fig. 2a and 2 B shown. For clarity, grab lines 8 were not shown.

In Fig. 2b ist die Luftströmung durch das Saugluftkanalsystem 23 und die Saugöffnungen 21 durch Pfeile angedeutet. Das Saugluftkanalsystem 23 dient der Verbindung der Saugöffnungen 21 mit den Unterdruckerzeugern 22 und ist in den Schnittdarstellungen Fig. 2c und Fig. 2d durch die Bogenbrems- und -streckvorrichtung dargestellt. Der Anschluss A der Unterdruckerzeuger 22 wird mit einer Blasluft b beaufschlagt. Die Blasluft b durchströmt den Unterdruckerzeuger 22, wodurch aufgrund des Venturi-Effekts ein Unterdruck erzeugt wird, welcher über das Saugluftkanalsystem 23 an den Saugöffnungen 21 bereitgestellt wird. Aufgrund des Unterdrucks wird in den Saugöffnungen 21 Luft angesaugt und diese Saugluft s saugt einen darüber hinweg bewegten Bogen 6 an und bremst diesen ab.In Fig. 2b is the air flow through the Saugluftkanalsystem 23 and the suction openings 21 indicated by arrows. The Saugluftkanalsystem 23 serves to connect the suction openings 21 with the vacuum generators 22 and is in the sectional views Fig. 2c and Fig. 2d represented by the Bogenbrems- and stretching device. The connection A of the vacuum generator 22 is acted upon by a blown air b. The blown air b flows through the vacuum generator 22, whereby a negative pressure is generated due to the Venturi effect, which is provided via the Saugluftkanalsystem 23 at the suction ports 21. Due to the negative pressure, air is sucked into the suction openings 21 and this suction air s sucks a sheet 6 moved over it and brakes it.

Fig. 3a zeigt die Bogenbrems- und -streckvorrichtung 20 mit der Luftführung bei Reinigung der Vorrichtung. Die Bogenbrems- und -streckvorrichtung 20 wird dann gereinigt, wenn die Stanz- und Prägemaschine 100 nicht in Betrieb ist, wenn also auch kein Bogen 6 abgebremst werden soll. Der Anschluss B der Einrichtung zur Reinigung der Bogenbrems- und -streckvorrichtung 20 wird dazu mit einer Blasluft b beaufschlagt. Über einen Kanal 25 wird die Blasluft b in das Saugluftkanalsystem 23 geleitet, durchbläst dieses und entfernt dadurch Staub- und Schmutzpartikel. Die Blasluft entweicht durch die Saugöffnungen 21. Alternativ kann der Anschluss B der Einrichtung zur Reinigung der Bogenbrems- und -streckvorrichtung 20 und der Anschluss A der Unterdruckerzeuger 22 gleichzeitig mit einer Blasluft b beaufschlagt werden (in Fig. 3a nicht dargestellt). Dadurch werden Unterdruckerzeuger, Saugluftkanalsystem und Saugöffnungen von einer Blasluft b durchströmt und gereinigt. Die Anbindung des Anschlusses B der Einrichtung zur Reinigung der Bogenbrems- und -streckvorrichtung 20 an das Saugluftkanalsystem 23 ist in der Schnittdarstellung Fig. 3b dargestellt: Ein Kanal 25 verbindet Anschluss B und Saugöffnungen 21. Fig. 3a shows the Bogenbrems- and stretching device 20 with the air guide in cleaning the device. The Bogenbrems- and stretching device 20 is then cleaned when the punching and embossing machine 100 is not in operation, so if no sheet 6 is to be braked. The connection B of the device for cleaning the Bogenbrems- and -stretching device 20 is acted upon by a blown air b. Via a channel 25, the blowing air b is passed into the Saugluftkanalsystem 23, blows this and thereby removes dust and dirt particles. The blowing air escapes through the suction openings 21. Alternatively, the port B of the device for cleaning the Bogenbrems- and -strreckvorrichtung 20 and the terminal A of the vacuum generator 22 can be acted upon simultaneously with a blown air b (in Fig. 3a not shown). As a result, vacuum generator, Saugluftkanalsystem and suction openings of a blast air b flows through and cleaned. The connection of the terminal B of the device for cleaning the Bogenbrems- and -strreckvorrichtung 20 to the Saugluftkanalsystem 23 is in the sectional view Fig. 3b A channel 25 connects port B and suction ports 21.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Anlegerinvestor
22
Stanzstationpunching station
33
Ausbrechstationstripping
44
Auslegerboom
55
Maschinengehäusemachine housing
66
Bogenbow
77
Transportsystem (Ketten)Transport system (chains)
88th
Greiferstangengripper bars
99
Untertischunder table
1010
Obertischovertable
1111
Abfallstücketrimmings
1212
Wagendare
1313
Palettepalette
1414
Auslagestapeldelivery pile
1515
Steuerungcontrol
1616
Zuführtischfeed
2020
Bogenbrems- und -streckvorrichtungSheet braking and stretching device
2121
Saugöffnungsuction opening
2222
UnterdruckerzeugerVacuum generator
2323
SaugluftkanalsystemSaugluftkanalsystem
2424
Befestigungsblechmounting plate
2525
Kanalchannel
100100
Bogenstanz- und -prägemaschineSheet punching and embossing machine
AA
Anschluss der UnterdruckerzeugerConnection of the vacuum generator
BB
Anschluss der Einrichtung zur Reinigung der Bogenbrems- und -streckvorrichtungConnection of the device for cleaning the Bogenbrems- and -strreckvorrichtung
ss
Saugluftsuction
bb
Blasluftblowing air
FF
Förderrichtungconveying direction

Claims (5)

  1. Sheet-processing machine, in particular sheet-fed diecutting and stamping/embossing machine (100) including at least one processing station (2, 3) and a delivery (4), a transport system (7) for guiding sheets and a pneumatic sheet-braking and tautening device (20) located in the delivery (4) and/or in a processing station (2, 3) and arranged in a plane parallel to and in the immediate vicinity of the sheet conveying plane and having suction openings (21) directed towards the sheet conveying plane, wherein negative pressure is present at the suction openings, the negative pressure generated by negative-pressure sources (22) to which blown air (b) is applied via at least one connection (A), and wherein the negative pressure is transmitted to the suction openings (21) by a suction channel system (23),
    characterized in
    that the sheet-braking and tautening device (20) includes a device for cleaning the former, equipped with at least one connection (B) to which blown air (b) can be supplied and which is connected to the suction air channel system (23) of the sheet-braking and tautening device (20) for blowing through the suction air channel system (23) and the suction openings (21).
  2. Sheet-processing machine according to Claim 1,
    characterized in
    that the sheet-processing machine includes a control (15) for activating the device for cleaning the sheet-braking and tautening device (20).
  3. Method for cleaning a pneumatic sheet-braking and tautening device (20) in a sheet-processing machine according to Claim 1, characterized by the step of blowing air through the suction-air channel system (23) and the suction openings (21) by supplying blown air (b) to a connection (B) of the device for cleaning the sheet-braking and tautening device (20).
  4. Method for cleaning a pneumatic sheet-braking and tautening device (20) of a sheet-processing machine according to Claim 1, characterized by the step of blowing air through the suction-air channel system (23), the suction openings (21), and the negative-pressure sources (22) by simultaneous application of blown air (b) to the at least one connection (A) of the negative-pressure sources (22) and to the connection (B) of the device for cleaning the sheet-braking and tautening device (20).
  5. Method for cleaning a pneumatic sheet-braking and tautening device (20) of a sheet-processing machine according to Claim 1, characterized by the steps of
    a) cleaning according to Claim 4
    b) cleaning according to Claim 5
EP07121391.2A 2006-12-18 2007-11-23 Sheet processing machine with sheet brake device and method for cleaning a sheet brake device Active EP1935820B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006059768 2006-12-18

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EP1935820A2 EP1935820A2 (en) 2008-06-25
EP1935820A3 EP1935820A3 (en) 2011-07-06
EP1935820B1 true EP1935820B1 (en) 2014-04-16

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ID=39212210

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CN108367876A (en) * 2015-10-13 2018-08-03 鲍勃斯脱梅克斯股份有限公司 Device and method for handling of paper element

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PL2585258T3 (en) * 2010-06-23 2020-11-16 Bobst Mex Sa Supporting device for a workstation of a profiling machine
US9193554B2 (en) 2012-05-03 2015-11-24 Bobst Mex Sa Braking device for a flat element in sheet form and method for cleaning such a device
DE102013017400B4 (en) * 2013-10-18 2015-05-28 Thomas Bühl Two-part cleaning and polishing punch
WO2020245116A1 (en) * 2019-06-05 2020-12-10 Bobst Mex Sa Suction brake, sheet conveyor with such suction brake and method of applying a retardation force to a moving sheet of material
JP2023551573A (en) * 2020-12-10 2023-12-08 ボブスト メックス ソシエテ アノニム Positioning devices and assemblies for holding flat flexible elements and sheet material processing machines

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US3779545A (en) * 1971-07-14 1973-12-18 Roland Offsetmaschf Delivery arrangement

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DE2453753C3 (en) * 1974-11-13 1982-05-27 M.A.N.- Roland Druckmaschinen AG, 6050 Offenbach Sheet brake

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US3779545A (en) * 1971-07-14 1973-12-18 Roland Offsetmaschf Delivery arrangement

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CN108367876A (en) * 2015-10-13 2018-08-03 鲍勃斯脱梅克斯股份有限公司 Device and method for handling of paper element

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EP1935820A2 (en) 2008-06-25
EP1935820A3 (en) 2011-07-06

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