EP0252418B1 - Guillotine-type cutter - Google Patents

Guillotine-type cutter Download PDF

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Publication number
EP0252418B1
EP0252418B1 EP87109435A EP87109435A EP0252418B1 EP 0252418 B1 EP0252418 B1 EP 0252418B1 EP 87109435 A EP87109435 A EP 87109435A EP 87109435 A EP87109435 A EP 87109435A EP 0252418 B1 EP0252418 B1 EP 0252418B1
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EP
European Patent Office
Prior art keywords
guillotine
type cutter
cutter according
holding
moved
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP87109435A
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German (de)
French (fr)
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EP0252418A1 (en
Inventor
Wolfgang Mohr
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Individual
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Individual
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Classifications

    • 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
    • B26D7/02—Means for holding or positioning work with clamping means
    • B26D7/025—Means for holding or positioning work with clamping means acting upon planar surfaces
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S414/00—Material or article handling
    • Y10S414/10—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns
    • Y10S414/12—Associated with forming or dispersing groups of intersupporting articles, e.g. stacking patterns including means pressing against top or end of group
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/04—Processes
    • Y10T83/0405—With preparatory or simultaneous ancillary treatment of work
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/444—Tool engages work during dwell of intermittent workfeed
    • Y10T83/4645—With means to clamp work during dwell
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/566—Interrelated tool actuating means and means to actuate work immobilizer
    • Y10T83/5669—Work clamp
    • Y10T83/5705—With means providing for plural steps in clamping stroke

Definitions

  • the invention relates to a plan cutting machine for stacked goods made of sheet material, such as paper, with a work table that has a receiving surface for the stacked goods behind a cutting knife, via which a stacked goods feed device can be moved approximately perpendicular to the cutting knife, and with a hold-down bar that runs approximately parallel to the cutting knife, is arranged near one end of the receiving surface and can be lowered under pressure on the stacked goods.
  • Such face cutting machines are generally known, for example from DE-A 3101 911.
  • the invention has for its object to improve the format accuracy in face cutting machines of the type described above.
  • an air spreading device which can also be lowered under pressure on the stacked goods and in this position can be moved from a location adjacent to the hold-down bar in the direction of the other end of the receiving surface.
  • the air spreading device integrated in the face cutting machine By means of the air spreading device integrated in the face cutting machine, air inclusions between the individual sheets of the stack can be eliminated immediately before the beginning of the cutting processes or even between the individual cutting processes.
  • the stack height is approximately reduced to the extent corresponding to the sum of the sheet thicknesses. Therefore, there is no strong further compression during cutting, with the result that the sheets of the upper stack part are not pulled forward or to a much lesser extent and are moved away from the front surface of the feed device.
  • the result is a compact stack in which the tendency of the sheets to move against one another is drastically reduced.
  • the risk of displacement is also low because the stack only has short transport routes in the machine. Overall, a high degree of format accuracy can be achieved.
  • the hold-down bar is preferably formed by the press bar and the spreading device can be moved from the front to the rear in the lowered position. Then you do not need a separate Niederbaitebaiken, which brings space and cost savings.
  • a pressing force setting device which, in addition to the pressing forces required during cutting, allows a holding-down pressing force of the press beam to be set. In this way, a reduced pressing force can be set, which is adapted to the conditions during spreading.
  • the air spreading device is a spreading roller. This can roll over the stacked goods without exerting frictional forces influencing the stack.
  • the spreading device is held on a bridge which can be moved by means of a motor on rails arranged on both sides of the receiving surface.
  • This bridge can give the streaking device the desired longitudinal movement without otherwise impairing the handling of the stack to be cut.
  • the spreading device can be moved up to a point between the stacked goods and the feed device. In this way it is ensured that the air is spread out to the rearmost edge of the stack.
  • the feed device which normally acts on the rear edge of the stack, should be able to be moved a sufficient distance further back.
  • the spreading device preferably has at least two pressure transmitters distributed over its length, with the aid of which it can be pressed against the stacked goods. This makes it possible to let approximately the same pressure act across the entire width of the spreading device. If spreads of smaller width are to be spread out, only a part of the pressure transmitters need to be supplied with pressure.
  • a cover which can be placed on the stacked goods and onto which the spreading device can be lowered.
  • a cover provides stability in the transverse direction, so that the sheets of the stack cannot move sideways when spreading out. This is particularly advantageous if several narrow block strips are next to each other on the receiving surface and are to be spread out together.
  • Such a cover expediently has air passage openings. So that the cover and stack enclosed between air can escape and there is no danger that the top sheet of the stack will be taken away by suction when the cover is lifted off.
  • the cover is formed by a cover band extending over the width of the receiving surface, the end of which facing the hold-down bar can be lowered and raised again by a servomotor and the other end of which is connected to a tensioning device which holds the cover band tensioned.
  • a masking tape is constantly in a ready position, in which it does not interfere with the feed and cutting operation, but can be brought into the working position required for spreading in a simple manner.
  • a winding roller pretensioned in the direction of rotation is recommended as the tensioning device. This takes up little space.
  • the winding roller can be mounted near the spreading device and can be moved together with the latter along the receiving surface.
  • the spreading device is in its rest position near the hold-down bar, the receiving surface is freely accessible.
  • the end of the cover tape facing the hold-down device is fastened to a height-adjustable cross-member arranged between the hold-down device and the spreading device. This traverse quickly brings the masking tape into the working position.
  • a driver which can be moved parallel to the cutting knife and is able to push the spread stacked goods against a side stop of the receiving surface is attached to the feed device. This takes into account the fact that the air is expediently stripped out when the stack is not yet against the side stop. After streaking, the driver can then guide the stack at the rear end against the side stop. At the front end, this can be done manually without difficulty.
  • the driver can be pivoted about an axis in such a way that it can be shifted from an effective position in front of the feed device into an ineffective position which avoids a collision with the press beam.
  • the driver therefore does not hinder the advancement of the feed device right up to the press beam.
  • the driver is carried by a block which is adjustable by means of a threaded spindle running parallel to the cutting knife, and is rotatably but axially displaceably mounted on a shaft which is parallel thereto and which can be rotated by a predetermined swivel angle. This results in a simple construction to move and pivot the driver.
  • the driver is preferably connected to the block via a pneumatic cylinder.
  • the driver is held resiliently, which prevents overstressing.
  • the actual alignment of the stack can be done by actuating the pneumatic cylinder.
  • the face cutting machine illustrated in the figures has a cutting knife 2 in a housing 1, which is only indicated, and a press beam 3 behind it.
  • a work table 4 which has a receiving surface 5 for stacked goods 6 behind the cutting knife 2 and the press beam 3.
  • a feed device 7 can be moved from the rear to the front, approximately perpendicular to the cutting knife 2, and back in the direction of the double arrow a in order to feed the stacked goods 6 to the cutting area.
  • the stack deforms in such a way that its rear edge 8 has the dashed course and is no longer in contact with the end face of the feed device 7 over the entire height could come.
  • the entire stack is compressed and the trailing edge 8 is aligned vertically by the air streak described below.
  • An air spreading device 9 in the form of a spreading roller is located above the receiving surface.
  • the bearing arrangement 10 is loaded by two pneumatic pressure transmitters 11, which have pistons and cylinders, the cylinders of which are mounted next to one another on the cross member 12 of a bridge 13, and are guided by means of rods 14 in bushings 15 on the cross member 12.
  • the spreading device 9 can be moved up and down in the direction of the arrow b.
  • the bridge 13 can be moved back and forth in the direction of arrow c with the aid of a servomotor 16 on longitudinal guides 17 and 18.
  • the servomotor 16 is arranged on one side. Its driver engages a toothed chain 19 or the like. on, which is guided over pulleys 20 and 21 on the work table 5 and connected to a foot of the bridge 13.
  • the other foot of the bridge is connected to a second toothed chain 22, which is guided over deflection rollers, which are connected to the deflection rollers 20 and 21 via axles 24 and 25 in a rotationally fixed manner.
  • the other end is held on a tensioning device 30 in the form of a pre-tensioned winding roller, which is mounted behind the spreading device 9 on the bridge 13.
  • the press beam 3 is reduced with a pressing force which is reduced compared to the pressing force used during cutting and is sufficient for holding down and which is specified with the aid of a pressing force adjusting device 31 (as shown in FIG Fig. 2 is indicated), lowered onto the stack 6.
  • the traverse 28 is moved with the end of the cover tape 27 from the illustrated ready position until it rests on the stack 6.
  • the spreading device 9 is then moved downward from the illustrated ready position and held against the cover tape 27 and the stack 6 with a predetermined pressure. With the help of the servomotor 16, the spreading device 9 is finally moved backwards, with air from the stack 6 is crossed out.
  • the feed device 7 has been moved backwards in good time beforehand, so that the streaking device 9 can be moved beyond the rear edge 8 of the stack 6.
  • This free space is usually available in face-cutting machines after the feed device 7 has pushed the stack 6 up to below the press beam.
  • the spreading device 9 is then raised again and returned to the ready position in the lifted state.
  • the cross member 28 and the press beam 3 are moved back to their ready position.
  • a driver 32 is attached to the feed device 7, which can be pivoted about an axis 33 from the effective position shown in FIG. 1 into the ineffective position illustrated in FIG has been introduced, did not collide with it.
  • the task of the driver 32 is to push the rear part of a stack 6 against a side stop 34 after air has been smeared out. The front end of the stack 6 can be pushed against this side stop 34 by hand.
  • the driver 32 is connected via a pneumatic cylinder 35 to a block 36 which is adjustable parallel to the cutting knife 2 by means of a threaded rod 37 which can be rotated by a motor 38. In this way, the driver 32 is movable in the direction of arrow e.
  • the swivel axis 33 is formed by a multi-tooth shaft which can be swiveled by 90 ° with the aid of a pneumatic cylinder 39 with the interposition of a swivel arm 40.
  • the movement sequences described can be controlled by an appropriate program so that they run automatically. If you mainly work with large stacks, you can also work with a cover sheet that is only put on if occasionally smaller stacks or block strips are to be spread out. The spreading can also take place from the back to the back if an additional hold-down bar is provided at the rear end of the receiving surface.
  • the servomotors can have the shape customary in face-cutting machines and can be operated in particular pneumatically, hydraulically or electrically.

Description

Die Erfindung bezieht sich auf eine Planschneidemaschine für Stapelgut aus blattförmigem Material, wie Papier, mit einem Arbeitstisch, der hinter einem Schneidmesser eine Aufnahmefläche für das Stapelgut aufweist, über die eine Stapelgut-Vorschubvorrichtung etwa senkrecht zum Schneidmesser bewegbar ist, und mit einem Niederhaltebalken, der etwa parallel zum Schneidmesser verläuft, nahe einem Ende der Aufnahmefläche angeordnet und unter Druck auf das Stapelgut absenkbar ist.The invention relates to a plan cutting machine for stacked goods made of sheet material, such as paper, with a work table that has a receiving surface for the stacked goods behind a cutting knife, via which a stacked goods feed device can be moved approximately perpendicular to the cutting knife, and with a hold-down bar that runs approximately parallel to the cutting knife, is arranged near one end of the receiving surface and can be lowered under pressure on the stacked goods.

Solche Planschneidemaschinen sind allgemein bekannt, beispielsweise aus DE-A 3101 911.Such face cutting machines are generally known, for example from DE-A 3101 911.

Ferner ist es aus US-A 4 490 207 bekannt, mittels eines Schneidmessers einzelne Abschnitte von einer Bahn abzuschneiden und anschließend zu stapeln. Beim Abtransport des Stapels durch ein Transportband wird eine Walze von oben auf den Stapel gedrückt. Hierdurch kann Luft aus dem sich bewegenden Stapel entfernt werden.Furthermore, it is known from US Pat. No. 4,490,207 to cut off individual sections from a web by means of a cutting knife and then to stack them. When the stack is removed by a conveyor belt, a roller is pressed onto the stack from above. This allows air to be removed from the moving stack.

Der Erfindung liegt die Aufgabe zugrunde, die Formatgenauigkeit bei Planschneidemaschinen der eingangs beschriebenen Art zu verbessern.The invention has for its object to improve the format accuracy in face cutting machines of the type described above.

Diese Aufgabe wird erfindungsgemäß gelöst durch eine Luft-Ausstreichvorrichtung, die ebenfalls unter Druck auf das Stapelgut absenkbar und in dieser Lage von einer dem Niederhaltebalken benachbarten Stelle in Richtung auf das andere Ende der Aufnahmefläche bewegbar ist.This object is achieved according to the invention by an air spreading device which can also be lowered under pressure on the stacked goods and in this position can be moved from a location adjacent to the hold-down bar in the direction of the other end of the receiving surface.

Durch die in die Planschneidemaschine integrierte Luft-Ausstreichvorrichtung können Lufteinschlüsse zwischen den einzelnen Blättern des Stapels unmittelbar vor Beginn der Schneidvorgänge oder sogar zwischen den einzelnen Schneidvorgängen beseitigt werden. Die Stapelhöhe wird annähemd au das der Summe der Blattdicken entsprechende Maß vermindert. Daher erfolgt beim Schneiden keine starke weitere Zusammendrückung mit der Folge, daß die Blätter des oberen Stapelteils nicht oder in wesentlich geringerem Maß nach vorn gezogen und dabei von der Vorderfläche der Vorschubvorrichtung wegbewegt werden. Es ergibt sich ein kompakter Stapel, in dem die Neigung der Blätter, sich gegeneinander zu verschieben, drastisch reduziert ist. Die Gefahr einer Verschiebung ist auch deshalb gering, weil der Stapel in der Maschine nur noch kurze Transportwege zurücklegt. Insgesamt ist ein hohes Maß an Formatgenauigkeit erzielbar.By means of the air spreading device integrated in the face cutting machine, air inclusions between the individual sheets of the stack can be eliminated immediately before the beginning of the cutting processes or even between the individual cutting processes. The stack height is approximately reduced to the extent corresponding to the sum of the sheet thicknesses. Therefore, there is no strong further compression during cutting, with the result that the sheets of the upper stack part are not pulled forward or to a much lesser extent and are moved away from the front surface of the feed device. The result is a compact stack in which the tendency of the sheets to move against one another is drastically reduced. The risk of displacement is also low because the stack only has short transport routes in the machine. Overall, a high degree of format accuracy can be achieved.

Vorzugsweise ist der Niederhaltebalken durch den Preßbalken gebildet und die Ausstreichvorrichtung in der abgesenkten Lage von vorn nach hinten bewegbar. Man benötigt dann keinen gesonderten Niederhaitebaiken, was Platz-und Kostenersparnisse mit sich bringt.The hold-down bar is preferably formed by the press bar and the spreading device can be moved from the front to the rear in the lowered position. Then you do not need a separate Niederbaitebaiken, which brings space and cost savings.

Hierbei empfiehlt sich eine Preßkraft-Einstellvorrichtung, die außer den beim Schneiden erforderlichen Preßkräften eine Niederhalte-Preßkraft des Preßbalkens einzustellen gestattet. Auf diese Weise läßt sich eine verminderte Preßkraft einstellen, die den Verhältnissen beim Ausstreichen angepaßt ist.Here, a pressing force setting device is recommended which, in addition to the pressing forces required during cutting, allows a holding-down pressing force of the press beam to be set. In this way, a reduced pressing force can be set, which is adapted to the conditions during spreading.

Bei einer bevorzugten Ausführungsform ist die Luft-Ausstreichvorrichtung eine Ausstreichwalze. Diese vermag über das Stapelgut zu rollen, ohne daß den Stapel beeinflussende Reibungskräfte ausgeübt werden.In a preferred embodiment, the air spreading device is a spreading roller. This can roll over the stacked goods without exerting frictional forces influencing the stack.

Besonders empfehlenswert ist es, wenn die Ausstreichvorrichtung an einer Brücke gehalten ist, die mittels eines Motors auf zu beiden Seiten der Aufnahmefläche angeordneten Schienen verfahrbar ist. Diese Brücke vermag der Ausstreichvorrichtung die gewünschte Längsbewegung zu erteilen, ohne die Handhabung des zu schneidenden Stapels im übrigen zu beinträchtigen.It is particularly advisable if the spreading device is held on a bridge which can be moved by means of a motor on rails arranged on both sides of the receiving surface. This bridge can give the streaking device the desired longitudinal movement without otherwise impairing the handling of the stack to be cut.

Günstig ist es, daß die Ausstreichvorrichtung bis zu einer Stelle zwischen Stapelgut und Vorschubvorrichtung bewegbar ist. Auf diese Weise ist gewährleistet, daß die Luft bis zur hintersten Stapelkante ausgestrichen wird. Hierzu sollte die Vorschubvorrichtung, die normalerweise an der Hinterkante des Stapels angreift, um ein ausreichendes Stück weiter nach hinten bewegt werden können.It is favorable that the spreading device can be moved up to a point between the stacked goods and the feed device. In this way it is ensured that the air is spread out to the rearmost edge of the stack. For this purpose, the feed device, which normally acts on the rear edge of the stack, should be able to be moved a sufficient distance further back.

Mit Vorzug weist die Ausstreichvorrichtung mindestens zwei über ihre Länge verteilte Druckgeber auf, mit deren Hilfe sie gegen das Stapelgut drückbar ist. Hiermit gelingt es, über die gesamte Breite der Ausstreichvorrichtung annähernd den gleichen Druck wirken zu lassen. Wenn Stapel geringerer Breite ausgestrichen werden sollen, braucht nur ein Teil der Druckgeber mit Druck versorgt zu werden.The spreading device preferably has at least two pressure transmitters distributed over its length, with the aid of which it can be pressed against the stacked goods. This makes it possible to let approximately the same pressure act across the entire width of the spreading device. If spreads of smaller width are to be spread out, only a part of the pressure transmitters need to be supplied with pressure.

Bei einer bevorzugten Ausführungsform gibt es eine auf das Stapelgut legbare Abdeckung, auf die die Ausstreichvorrichtung absenkbar ist. Eine solche Abdeckung gibt eine Stabilität in Querrichtung, so daß die Blätter des Stapels beim Ausstreichen nicht seitlich ausweichen können. Dies ist insbesondere von Vorteil, wenn sich mehrere schmale Blockstreifen nebeneinander auf der Aufnahmefläche befinden und gemeinsam ausgestrichen werden sollen. Eine solche Abdeckung weist zweckmäßigerweise Luftdurchtrittsöffnungen auf. Damit kann die zwi sehen Abdeckung und Stapel eingeschlossene Luft entweichen und es besteht keine Gefahr, daß beim Abheben der Abdeckung das oberste Blatt des Stapels durch Saugwirkung mitgenommen wird.In a preferred embodiment there is a cover which can be placed on the stacked goods and onto which the spreading device can be lowered. Such a cover provides stability in the transverse direction, so that the sheets of the stack cannot move sideways when spreading out. This is particularly advantageous if several narrow block strips are next to each other on the receiving surface and are to be spread out together. Such a cover expediently has air passage openings. So that the cover and stack enclosed between air can escape and there is no danger that the top sheet of the stack will be taken away by suction when the cover is lifted off.

Sehr günstig ist es, daß die Abdeckung durch ein sich über die Breite der Aufnahmefläche erstreckendes Abdeckband gebildet ist, dessen den Niederhaltebalken zugewandtes Ende durch einen Stellmotor absenkbar und wieder anhebbar ist und dessen anderes Ende mit einer das Abdeckband gespannt haltenden Spannvorrichtung verbunden ist. Ein solches Abdeckband befindet sich dauernd in einer Bereitsschaftsstellung, in der es den Vorschub-und Schneidbetrieb nicht stört, kann aber auf einfache Weise in die zum Ausstreichen erforderliche Arbeitsstellung gebracht werden.It is very favorable that the cover is formed by a cover band extending over the width of the receiving surface, the end of which facing the hold-down bar can be lowered and raised again by a servomotor and the other end of which is connected to a tensioning device which holds the cover band tensioned. Such a masking tape is constantly in a ready position, in which it does not interfere with the feed and cutting operation, but can be brought into the working position required for spreading in a simple manner.

Als Spannvorrichtung empfiehlt sich eine in Drehrichtung vorgespannte Wickelwalze. Diese nimmt wenig Platz ein.A winding roller pretensioned in the direction of rotation is recommended as the tensioning device. This takes up little space.

Insbesondere kann die Wickelwalze nahe der Ausstreichvorrichtung gelagert und zusammen mit dieser längs der Aufnahmefläche bewegbar sein. Wenn sich die Ausstreichvorrichtung in ihrer Ruhelage nahe dem Niederhaltebalken befindet, ist die Aufnahmefläche ungehindert zugänglich.In particular, the winding roller can be mounted near the spreading device and can be moved together with the latter along the receiving surface. When the spreading device is in its rest position near the hold-down bar, the receiving surface is freely accessible.

Außerdem ist es günstig, daß das dem Niederhalter zugewandte Ende des Abdeckbandes an einer zwischen Niederhalter und Ausstreichvorrichtung angeordneten, höhenverstellbaren Traverse befestigt ist. Durch diese Traverse wird das Abdeckband rasch in die Arbeitsstellung gebracht.In addition, it is favorable that the end of the cover tape facing the hold-down device is fastened to a height-adjustable cross-member arranged between the hold-down device and the spreading device. This traverse quickly brings the masking tape into the working position.

In weiterer Ausgestaltung der Erfindung ist dafür gesorgt, daß an der Vorschubvorrichtung ein parallel zum Schneidmesser bewegbarer Mitnehmer angebracht ist, der das ausgestrichene Stapelgut gegen einen Seitenanschlag der Aufnahmefläche zu schieben vermag. Hiermit wird der Tatsache Rechnung getragen, daß das Ausstreichen der Luft zweckmäßigerweise erfolgt, wenn der Stapel noch nicht am Seitenanschlag anliegt. Der Mitnehmer kann dann nach dem Ausstreichen den Stapel am hinteren Ende gegen den Seitenanschlag führen. Am vorderen Ende kann dies ohne Schwierigkeiten manuell erfolgen.In a further embodiment of the invention, it is ensured that a driver which can be moved parallel to the cutting knife and is able to push the spread stacked goods against a side stop of the receiving surface is attached to the feed device. This takes into account the fact that the air is expediently stripped out when the stack is not yet against the side stop. After streaking, the driver can then guide the stack at the rear end against the side stop. At the front end, this can be done manually without difficulty.

Konstruktiv ist es von Vorteil, wenn der Mitnehmer um eine Achse derart schwenkbar ist, daß er aus einer wirksamen Stellung vor der Vorschubvorrichtung in eine unwirksame, eine Kollision mit dem Preßbalken vermeidende Stellung verlagerbar ist. Der Mitnehmer behindert daher nicht das Vorbewegen der Vorschubvorrichtung bis unmittelbar an den Preßbalken heran.In terms of construction, it is advantageous if the driver can be pivoted about an axis in such a way that it can be shifted from an effective position in front of the feed device into an ineffective position which avoids a collision with the press beam. The driver therefore does not hinder the advancement of the feed device right up to the press beam.

Es ist günstig, daß der Mitnehmer von einem Block getragen ist, der mittels einer parallel zum Schneidmesser verlaufenden Gewindespindel verstellbar ist, und drehfest, aber axial verschiebbar, auf einer hierzu parallelen Welle gelagert ist, die um einen vorgegebenen Schwenkwinkel drehbar ist. Dies ergibt eine einfache Konstruktion, um den Mitnehmer zu verschieben und zu verschwenken.It is favorable that the driver is carried by a block which is adjustable by means of a threaded spindle running parallel to the cutting knife, and is rotatably but axially displaceably mounted on a shaft which is parallel thereto and which can be rotated by a predetermined swivel angle. This results in a simple construction to move and pivot the driver.

Vorzugsweise ist der Mitnehmer über einen Pneumatikzylinder mit dem Block verbunden. Hierdurch wird der Mitnehmer federnd gehalten, wodurch Überbeanspruchungen vermieden werden. Außerdem kann die eigentliche Ausrichtung des Stapels durch Betätigung des Pneumatikzylinders erfolgen.The driver is preferably connected to the block via a pneumatic cylinder. As a result, the driver is held resiliently, which prevents overstressing. In addition, the actual alignment of the stack can be done by actuating the pneumatic cylinder.

Die Erfindung wird nachstehend anhand eines in der Zeichnung dargestellten, bevorzugten Ausführungsbeispiels näher erläutert. Es zeigen:

  • Fig. 1 eine schematische Seitenansicht einer erfindungsgemäßen Planschneidemaschine, wobei sich die Ausstreichvorrichtung in ihrer Bereitschaftsstellung und die Vorschubvorrichtung in ihrer Vorschub-Anfangslage befindet,
  • Fig. 2 eine Darstellung ähnlich Fig. 1, wobei sich die Ausstreichvorrichtung am Ende ihres Arbeitsweges und die Vorschubvorrichtung in einer zurückgezogenen Stellung befindet,
  • Fig. 3 eine schematische Draufsicht auf die Planschneidemaschine der Fig. 1 und 2, wobei sich die Ausstreichvorrichtung in einer Zwischenstellung befindet, und
  • Fig. 4 eine Vorderansicht einer an der Maschine gelagerten Brücke mit der Ausstreichvorrichtung.
The invention is explained below with reference to a preferred embodiment shown in the drawing. Show it:
  • 1 is a schematic side view of a chopping machine according to the invention, with the spreading device in its ready position and the feed device in its initial feed position,
  • 2 shows a representation similar to FIG. 1, the spreading device being at the end of its working path and the feed device in a retracted position,
  • 3 is a schematic plan view of the face cutting machine of FIGS. 1 and 2, the spreading device being in an intermediate position, and
  • Fig. 4 is a front view of a bridge mounted on the machine with the streaking device.

Die in den Figuren veranschaulichte Planschneidemaschine weist in einem nur angedeuteten Gehäuse 1 ein Schneidmesser 2 und dahinter einen Preßbalken 3 auf. Es gibt einen Arbeitstisch 4, der hinter dem Schneidmesser 2 und dem Preßbalken 3 eine Aufnahmefläche 5 für Stapelgut 6 aufweist. Ober die Aufnahmefläche ist eine Voschubvorrichtung 7 von hinten nach vorn, etwa senkrecht zum Schneidmesser 2, und zurück in Richtung des Doppelpfeiles a bewegbar, um das Stapelgut 6 dem Schneidbereich zuzuführen.The face cutting machine illustrated in the figures has a cutting knife 2 in a housing 1, which is only indicated, and a press beam 3 behind it. There is a work table 4, which has a receiving surface 5 for stacked goods 6 behind the cutting knife 2 and the press beam 3. Above the receiving surface, a feed device 7 can be moved from the rear to the front, approximately perpendicular to the cutting knife 2, and back in the direction of the double arrow a in order to feed the stacked goods 6 to the cutting area.

Wenn der Preßbalken 3 das Stapelgut 6 am vorderen Ende auf eine geringere Höhe zusammendrückt (Fig. 2), verformt sich der Stapel derart, daß seine Hinterkante 8 den gestrichelten Verlauf hat und nicht mehr über die gesamte Höhe mit der Stirnfläche der Vorschubvorrichtung 7 in Kontakt kommen könnte. Durch das nachstehend beschriebene Luft-Ausstreichen wird der gesamte Stapel zusammengedrückt und die Hinterkante 8 senkrecht ausgerichtet.When the press beam 3 compresses the stacked goods 6 at the front end to a lower height (FIG. 2), the stack deforms in such a way that its rear edge 8 has the dashed course and is no longer in contact with the end face of the feed device 7 over the entire height could come. The entire stack is compressed and the trailing edge 8 is aligned vertically by the air streak described below.

Über der Aufnahmefläche befindet sich eine Luft-Ausstreichvorrichtung 9 in der Form einer Ausstreichwalze. Deren Lageranordnung 10 ist durch zwei, Kolben und Zylinder aufweisende, pneumatische Druckgeber 11 belastet, deren Zylinder nebeneinander an dem Querträger 12 einer Brücke 13 angebracht sind, und mit Hilfe von Stangen 14 in Buchsen 15 am Querträger 12 geführt. Mit Hilfe dieser Druckgeber 11 kann die Ausstreichvorrichtung 9 in Richtung des Pfeiles b auf und ab bewegt werden. Außerdem ist die Brücke 13 mit Hilfe eines Stellmotors 16 auf Längsführungen 17 und 18 in Richtung des Pfeiles c hin und her bewegbar. Der Stellmotor 16 ist einseitig angeordnet. Sein Mitnehmer greift an einer Zahnkette 19 o.dgl. an, die über Umlenkrollen 20 und 21 am Arbeitstisch 5 geführt und mit einem Fuß der Brücke 13 verbunden ist.An air spreading device 9 in the form of a spreading roller is located above the receiving surface. The bearing arrangement 10 is loaded by two pneumatic pressure transmitters 11, which have pistons and cylinders, the cylinders of which are mounted next to one another on the cross member 12 of a bridge 13, and are guided by means of rods 14 in bushings 15 on the cross member 12. With the help of these pressure transmitters 11, the spreading device 9 can be moved up and down in the direction of the arrow b. In addition, the bridge 13 can be moved back and forth in the direction of arrow c with the aid of a servomotor 16 on longitudinal guides 17 and 18. The servomotor 16 is arranged on one side. Its driver engages a toothed chain 19 or the like. on, which is guided over pulleys 20 and 21 on the work table 5 and connected to a foot of the bridge 13.

Der andere Fuß der Brücke ist mit einer zweiten Zahnkette 22 verbunden, die über Umlenkrollen geführt ist, welche mit den Umlenkrollen 20 und 21 über Achsen 24 und 25 drehfest verbunden sind.The other foot of the bridge is connected to a second toothed chain 22, which is guided over deflection rollers, which are connected to the deflection rollers 20 and 21 via axles 24 and 25 in a rotationally fixed manner.

Ein mit Luftlöchern 26 versehenes Abdeckband 27, das in Querrichtung eine gewisse Steifigkeit hat, ist mit einem Ende an einer Traverse 28 befestigt, welche mit Hilfe von Stellmotoren 29 in Richtung des Pfeiles d auf und ab bewegbar ist. Das andere Ende ist auf einer Spannvorrichtung 30 in der Form einer vorgespannten Wickelwalze gehalten, die hinter der Ausstreichvorrichtung 9 an der Brücke 13 gelagert ist.A cover band 27 provided with air holes 26, which has a certain rigidity in the transverse direction, is fastened at one end to a crossmember 28, which can be moved up and down in the direction of arrow d with the aid of servomotors 29. The other end is held on a tensioning device 30 in the form of a pre-tensioned winding roller, which is mounted behind the spreading device 9 on the bridge 13.

Um bei einem Stapel 6 in der in Fig. 2 befindlichen Position die Luft auszustreichen, wird der Preßbalken 3 mit einer gegenüber der beim Schneiden angewendeten Preßkraft verminderten, zum Niederhalten ausreichenden Preßkraft, die mit Hilfe einer Preßkraft-Einstellvorrichtung 31 vorgegeben wird (wie es in Fig. 2 angedeutet ist), auf den Stapel 6 abgesenkt. Dann wird die Traverse 28 mit dem Ende des Abdeckbandes 27 aus der veranschaulichten Bereitschaftsstellung so weit nach unten bewegt, bis sie auf dem Stapel 6 aufliegt. Alsdann wird die Ausstreichvorrichtung 9 aus der veranschaulichten Bereitshaftsstellung nach unten bewegt und mit einem vorgegebenen Druck gegen das Abdeckband 27 und den Stapel 6 gehalten. Mit Hilfe des Stellmotors 16 wird schließlich die Ausstreichvorrichtung 9 nach hinten bewegt, wobei Luft aus dem Stapel 6 ausgestrichen wird. Die Vorschubvorrichtung 7 ist rechtzeitig vorher nach hinten bewegt worden, so daß die Ausstreichvorrichtung 9 bis über die Hinterkante 8 des Stapels 6 bewegt werden kann. Dieser freie Raum ist bei Planschneidemaschinen in der Regel vorhanden, nachdem die Vorschubvorrichtung 7 den Stapel 6 bis unter den Preßbalken geschoben hat.In order to remove the air from a stack 6 in the position shown in FIG. 2, the press beam 3 is reduced with a pressing force which is reduced compared to the pressing force used during cutting and is sufficient for holding down and which is specified with the aid of a pressing force adjusting device 31 (as shown in FIG Fig. 2 is indicated), lowered onto the stack 6. Then the traverse 28 is moved with the end of the cover tape 27 from the illustrated ready position until it rests on the stack 6. The spreading device 9 is then moved downward from the illustrated ready position and held against the cover tape 27 and the stack 6 with a predetermined pressure. With the help of the servomotor 16, the spreading device 9 is finally moved backwards, with air from the stack 6 is crossed out. The feed device 7 has been moved backwards in good time beforehand, so that the streaking device 9 can be moved beyond the rear edge 8 of the stack 6. This free space is usually available in face-cutting machines after the feed device 7 has pushed the stack 6 up to below the press beam.

Die Ausstreichvorrichtung 9 wird anschließend wieder angehoben und im abgehobenen Zustand in die Bereitschaftsstellug zurückgeführt. Auch die Traverse 28 und der Preßbalken 3 werden in ihre Bereitschaftsstellung zurückbewegt.The spreading device 9 is then raised again and returned to the ready position in the lifted state. The cross member 28 and the press beam 3 are moved back to their ready position.

An der Vorschubvorrichtung 7 ist ein Mitnehmer 32 angebracht, der aus der in Fig. 1 ersichtlichen wirksamen Stellung um eine Achse 33 in die in Fig. 2 veranschaulichte unwirksame Stellung geschwenkt werden kann, in der er, wenn die Vorschubvorrichtung 7 bis an den Preßbalken 3 herangeführt worden ist, mit diesem nicht kollidiert. Aufgabe des Mitnehmers 32 ist es, den hinteren Teil eines Stapels 6 nach dem Luft-Ausstreichen gegen einen Seitenanschlag 34 zu schieben. Das vordere Ende des Stapels 6 kann von Hand gegen diesen Seitenanschlag 34 geschoben werden.A driver 32 is attached to the feed device 7, which can be pivoted about an axis 33 from the effective position shown in FIG. 1 into the ineffective position illustrated in FIG has been introduced, did not collide with it. The task of the driver 32 is to push the rear part of a stack 6 against a side stop 34 after air has been smeared out. The front end of the stack 6 can be pushed against this side stop 34 by hand.

Der Mitnehmer 32 ist über einen Pneumatikzylinder 35 mit einem Block 36 verbunden, der mittels einer Gewindestange 37, die durch einen Motor 38 gedreht werden kann, parallel zum Schneidmesser 2 verstellbar ist. Auf diese Weise ist der Mitnehmer 32 in Richtung des Pfeiles e bewegbar. Die Schwenkachse 33 wird durch eine Vielzahnwelle gebildet, die mit Hilfe eines Pneumatikzylinders 39 unter Zwischenschaltung eines Schwenkarms 40 um 90° verschwenkt werden kann.The driver 32 is connected via a pneumatic cylinder 35 to a block 36 which is adjustable parallel to the cutting knife 2 by means of a threaded rod 37 which can be rotated by a motor 38. In this way, the driver 32 is movable in the direction of arrow e. The swivel axis 33 is formed by a multi-tooth shaft which can be swiveled by 90 ° with the aid of a pneumatic cylinder 39 with the interposition of a swivel arm 40.

Die beschriebenen Bewegungsabläufe können durch ein entsprechendes Programm gesteuert werden, so daß sie automatisch ablaufen. Wenn überwiegend mit großen Stapeln gearbeitet wird, kann man auch mit einem Abdeckblatt arbeiten, das nur dann aufgelegt wird, wenn gelegentlich kleinere Stapel oder Blockstreifen ausgestrichen werden sollen. Das Ausstreichen kann auch von hinten nach vom erfolgen, wenn ein zusätzlicher Niederhaltebalken am hinteren Ende der Aufnahmefläche vorgesehen ist. Die Stellmotoren können die bei Planschneidemaschinen übliche Form haben und insbesondere pneumatisch, hydraulisch oder elektrisch betrieben werden.The movement sequences described can be controlled by an appropriate program so that they run automatically. If you mainly work with large stacks, you can also work with a cover sheet that is only put on if occasionally smaller stacks or block strips are to be spread out. The spreading can also take place from the back to the back if an additional hold-down bar is provided at the rear end of the receiving surface. The servomotors can have the shape customary in face-cutting machines and can be operated in particular pneumatically, hydraulically or electrically.

Claims (17)

1. Guillotine-type cutter for stacked sheet-like material such as paper, having a work table (4) which, behind a cutting blade (2), has a locating surface (5) for the stacked material (6), across which locating surface (5) a stacked-material feed device can be moved approximately at right angles to the cutting blade (2), and a holding-down beam (3) which runs approximately parallel to the cutting blade (2), is arranged close to one end of the locating surface (5) and can be lowered under pressure onto the stacked material (6), characterized by an air-expelling device (9) which can likewise be lowered under pressure onto the stacked material (6) and, in this position, can be moved from a location adjacent to the holding-down beam (3) towards the other end of the locating surface (5).
2. Guillotine-type cutter, having a press beam arranged behind the cutting blade, according to claim 1, characterized in that the holding-down beam is formed by the press beam (3), and the expelling device (9) can be moved from front to rear in the lowered position.
3. Guillotine-type cutter according to claim 2, characterized by a press-force adjusting device (31) which, apart from the press forces required during cutting, enables a holding-down press force of the press beam (3) to be set.
4. Guillotine-type cutter according to any of claims 1 to 3, characterized in that the air-expelling device (9) is an expelling roller.
5. Guillotine-type cutter according to any of claims 1 to 4, characterized in that the expelling device (9) is held on a bridge (13) which, by means of a motor (16), can be moved on rails (17, 18) arranged on both sides of the locating surface.
6. Guillotine-type cutter according to any of claims 1 to 5, characterized in that the expelling device (9) can be moved up to a location between stacked material (6) and feed device (7).
7. Guillotine-type cutter according to any of claims 1 to 6, characterized in that the expelling device (9) has at least two pressure transmitters (11) distributed over its length, by means of which it can be pressed against the stacked material (6).
8. Guillotine-type cutter according to any of claims 1 to 7, characterized by a cover (27) which can be put onto the stacked material (6) and onto which the expelling device (9) can be lowered.
9. Guillotine-type cutter according to claim 8, characterized in that the cover (17) has air passage openings (26).
10. Guillotine-type cutter according to claim 8 or 9, characterized in that the cover (27) is formed by a cover band which extends over the width of the locating surface and whose end facing the holding-down beam (3) can be lowered and lifted again by a servomotor (29) and whose other end is connected to a tensioning device (30) holding the cover band in a tensioned manner.
11. Guillotine-type cutter according to claim 10, characterized in that the tensioning device (30) is a winding roller pretensioned in the direction of rotation.
12. Guillotine-type cutter according to claim 11, characterized in that the winding roller (30) is mounted close to the expelling device (9) and is movable together with the latter along the locating surface (5).
13. Guillotine-type cutter according to any of claims 10 to 12, characterized in that the end of the cover band (27) facing the holding-down beam (3) is fixed to a vertically adjustable cross bar (28) arranged between holding-down beam and expelling device (9).
14. Guillotine-type cutter according to any of claims 1 to 13, characterized in that a dog (32) movable parallel to the cutting blade (2) is attached to the feed device (9), which dog (32) is able to push the stacked material (6) from which air is expelled against a side stop (34) of the locating surface (5).
15. Guillotine-type cutter according to claim 14, characterized in that the dog (32) can be pivoted on a spindle (33) in such a way that it can be displaced from an operative position in front of the feed device (7) into an inoperative position avoiding a collision with the press beam (3).
16. Guillotine-type cutter according to claim 14 or 15, characterized in that the dog (32) is carried by a block (36), which can be moved by means of a threaded spindle (37) running parallel to the cutting blade (2), and is mounted on a shaft (33), parallel to the threaded spindle (37), in such a way as to be fixed in terms of rotation but axially displaceable, which shaft (33) can be rotated through a predetermined pivoting angle.
17. Guillotine-type cutter according to claim 16, characterized in that the dog (32) is connected to the block via a pneumatic cylinder (35).
EP87109435A 1986-07-09 1987-07-01 Guillotine-type cutter Expired - Lifetime EP0252418B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3623004 1986-07-09
DE19863623004 DE3623004A1 (en) 1986-07-09 1986-07-09 SURFACE MACHINE

Publications (2)

Publication Number Publication Date
EP0252418A1 EP0252418A1 (en) 1988-01-13
EP0252418B1 true EP0252418B1 (en) 1990-05-23

Family

ID=6304706

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EP87109435A Expired - Lifetime EP0252418B1 (en) 1986-07-09 1987-07-01 Guillotine-type cutter

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US (1) US4836074A (en)
EP (1) EP0252418B1 (en)
JP (1) JPS6322298A (en)
DE (2) DE3623004A1 (en)
ES (1) ES2015925B3 (en)

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Also Published As

Publication number Publication date
US4836074A (en) 1989-06-06
DE3623004A1 (en) 1988-01-28
DE3623004C2 (en) 1988-06-01
JPH046513B2 (en) 1992-02-06
DE3762818D1 (en) 1990-06-28
ES2015925B3 (en) 1990-09-16
EP0252418A1 (en) 1988-01-13
JPS6322298A (en) 1988-01-29

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