EP1754578B1 - Cutting device for sheets - Google Patents

Cutting device for sheets Download PDF

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Publication number
EP1754578B1
EP1754578B1 EP20060016305 EP06016305A EP1754578B1 EP 1754578 B1 EP1754578 B1 EP 1754578B1 EP 20060016305 EP20060016305 EP 20060016305 EP 06016305 A EP06016305 A EP 06016305A EP 1754578 B1 EP1754578 B1 EP 1754578B1
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EP
European Patent Office
Prior art keywords
lever
cutting
holddown
unit according
cutting unit
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.)
Not-in-force
Application number
EP20060016305
Other languages
German (de)
French (fr)
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EP1754578A1 (en
Inventor
Bernd Loibl
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.)
Purple Cows GmbH
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Purple Cows GmbH
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Publication date
Application filed by Purple Cows GmbH filed Critical Purple Cows GmbH
Publication of EP1754578A1 publication Critical patent/EP1754578A1/en
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Publication of EP1754578B1 publication Critical patent/EP1754578B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B26D1/00—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor
    • B26D1/01—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work
    • B26D1/12—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis
    • B26D1/25—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member
    • B26D1/26—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut
    • B26D1/30—Cutting through work characterised by the nature or movement of the cutting member or particular materials not otherwise provided for; Apparatus or machines therefor; Cutting members therefor involving a cutting member which does not travel with the work having a cutting member moving about an axis with a non-circular cutting member moving about an axis substantially perpendicular to the line of cut with limited pivotal movement to effect cut
    • 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
    • B26D2007/0012—Details, accessories or auxiliary or special operations not otherwise provided for
    • B26D2007/0087—Details, accessories or auxiliary or special operations not otherwise provided for for use on a desktop
    • 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
    • Y10T83/768—Rotatable disc tool pair or tool and carrier
    • Y10T83/7755—Carrier for rotatable tool movable during cutting
    • Y10T83/7763—Tool carrier reciprocable rectilinearly
    • 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
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8798—With simple oscillating motion only
    • Y10T83/8812—Cutting edge in radial plane
    • 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
    • Y10T83/869—Means to drive or to guide tool
    • Y10T83/8821—With simple rectilinear reciprocating motion only
    • Y10T83/8822—Edge-to-edge of sheet or web [e.g., traveling cutter]

Definitions

  • the invention relates to a cutting device for trimming sheet material with a Blattgutauflage and at least one cutting device, adjacent to a hold down for pressing the sheet material is arranged on the Blattgutauflage, wherein the hold-down between a raised starting position and a displaced in the direction of the Blattgutauflage pressing position movable is and is acted upon by a force-boosting lever in the direction of the pressing position, which is operable by hand, that the force exerted thereby is increasingly transmitted to the hold-down.
  • Cutters of the aforementioned type are known in various embodiments and are used primarily in the office sector to bring sheet material individually or in a stacked form to a desired level.
  • Sheet material can be paper sheets, photo paper, cardboard, but also foils.
  • the cutters generally have the same basic structure. You have a Blattgutierlage, which consists of a frame mostly rectangular plan and a topside, extending horizontally plate. On one side of the Blattgutauflage a cutter is arranged. Lever cutting devices are widely used, the one at one end of the cutting device about a horizontal axis pivotally mounted cutting lever having a cutting blade with cutting edge at the bottom and a handle at its outer end.
  • the cutting device includes a mounted on the Blattgutauflage or formed by her counter knife with a horizontally extending cutting edge.
  • a roller cutting device can also be provided (cf. US 2002/0092396 A1 ).
  • a knife carriage is mounted displaceably on a guide rail arranged above the sheet material support.
  • the knife carriage has a disc knife rotatably mounted about a horizontal axis, which can be pressed from a raised starting position against a cutting strip acting as a counter knife.
  • cutters having on one side of a lever cutting device and on the opposite side a roller cutting device to each have an optimal for the type of material to be trimmed cutting device available without requiring the purchase of two cutters is necessary (see , EP 1 475 201 A1 ).
  • the sheet material is placed on the Blattgutauflage and thereby pushed into the cutting device far enough that the part to be cut off the Leaves good over the counter knife projecting out.
  • the first tilted cutting arm is then pivoted down, the cutting edge of his cutting knife past the cutting edge of the counter knife and thus cuts the sheet material.
  • the knife carriage which is initially seated on one side of the guide rail, is pressed down with the disk knife against the cutting strip and then moved along the rail. The disc knife rolls over the cutting strip and separates the protruding part of the sheet material.
  • lever cutting devices of the hold-down is designed as a cross-sectionally L-shaped hold-down rail, which is guided vertically displaceably at both ends of vertical retaining bolts.
  • the hold-down rail is held in a raised starting position, in which the hold-down rail distance to the Blattgutauflage and to the counter knife, so that the sheet material to be trimmed can be pushed under the hold-down rail.
  • the hold-down rail has a horizontal leg over which the hold-down rail for the trimming down against the sheet material and against the action of the aforementioned Springs can be pressed.
  • One of the horizontal leg at the side adjacent to the cutting lever side upstanding leg serves to protect the hand in front of the cutting lever.
  • the guide rail for the knife carriage serves as a hold-down rail and is thus mounted vertically displaceable or pivotable at both ends or pivoted only at one end and can be pressed from an''high raised starting position after pushing the sheet material against the sheet material.
  • the hold-down rail can then be fixed in this position, so that they no longer have to be applied by hand during the displacement of the knife carriage.
  • the lever cutting devices are suitable for simultaneously cutting a sheet material stack of a plurality of sheets by a single cutting movement of the cutting lever.
  • the force exerted by the operator's hand on the hold down force is often insufficient to counteract the tendency of the circumcision to mutually shift the sheets of sheet stock pile.
  • the sheet stack is then trimmed at an angle, with the result that the trimmed sheets are not the same size.
  • hold-downs In order to allow higher forces to act on a stack of sheets, hold-downs have been developed, the one of a Operator spent strength to strengthen.
  • a shaft In the holddown at the FR 653 378 is mounted above and parallel to the hold-down a shaft which can be rotated by means of a lever in rotary motion.
  • cams On the shaft cams are formed, which come with a rotational movement of the shaft in contact with the hold-down and press it onto a stack of sheets.
  • complicated lever designs have been developed as the US Pat. No. 3,497,203 and the DE 20 2004 011 728 U1 can be seen.
  • the power amplification is effected by a lever which acts force-enhancing over a plurality of tabs on a hold-down.
  • the invention has the object of providing a cutting device of the type mentioned in such a way that it does not come to a displacement of the leaves of the sheet stack with each other when trimming and thicker Blattgutstapel.
  • the power boost lever is designed in the manner of a toggle lever and kinks to form a knee that acts on the hold-down.
  • the basic idea of the invention is therefore to provide a special, designed in the manner of a toggle lever amplifying lever which acts with his knee the hold-down, so that the manual force of the operator does not act directly on the hold, but on the power boost lever with the result that the hand force according to the respective Leverage ratios is enhanced and thus the sheet stack is pressed with a much stronger, by hand barely or not exercisable force on the Blattgutauflage. Due to the increased pressing force mutual displacement of the leaves of the stack of sheet material is avoided, and it can be cut precisely and with identical results in a single operation and thicker Blattgutstapel.
  • the power boost lever is particularly suitable for hold-down, which is formed in a conventional manner as parallel to the cutting device extending hold-down rails, which are conveniently guided on at least one end, preferably at both ends, movable and held there by spring force in the starting position ,
  • hold-down rails are available especially with lever cutting devices.
  • this does not exclude that as a hold-down rail, the guide rail for the blade carriage is used in slitter and thus this guide rail is acted upon by the power boosting lever according to the invention.
  • the power boost lever should be pivotally mounted in the region of one end of the cutter, preferably so that the power boost lever is movably guided together with one end of the hold-down rail. It is advisable that the power boost lever from the one end of the hold-down rail extends along the hold-down rail. In a special embodiment it is provided that power boost lever and lower holding rail sit on a guide pin with unten workedem stop for the hold-down rail and topside stop for the power boost lever.
  • the toggle lever preferably extends substantially parallel to the holddown initially and then bends obliquely upward at the knee in an angle suitable for operation by the operator.
  • the cutting device is designed as a lever cutting device, which has a pivotally mounted cutting lever has further proposed that the cutting lever during the cutting process, the hold-down is acted upon by a spring in the pressing direction to exert a pressing force on the hold-down over the cutting lever.
  • the power-boosting lever may be mounted in the region of the one end of the cutting device and the cutting lever at the other end of the cutting device, so that forces are exerted on both sides of the blank holder.
  • the spring is then expediently arranged in the region of the bearing of the cutting lever.
  • the cutting device 1 shown in the figures has a device frame 2 in an approximately rectangular plan, the top side has a horizontally extending Blattgutauflage 3, the in FIG. 2 only partially shown.
  • a lever cutting device 4 On one side of the Blattgutauflage 3 a lever cutting device 4 is provided. It has a cutting lever 5 with bottom-side cutting blade 6, which is pivotally mounted at one end via a horizontally extending axis 7. At the free end forms the cutting lever 5 from a handle 8, via which the cutting lever 5 can be pivoted for a cutting operation from the raised position shown down in a horizontal position.
  • the cutting blade 6 rubs past an edge of the Blattgutauflage 3, which serves as a counter knife 9.
  • a hold-down rail 10 extends almost over the entire length of the lever cutter 4.
  • the hold-down rail 10 has an L-shaped cross-section with a horizontal press leg 11 and one of which on the cutting blade 6 adjacent side vertically upstanding protective leg 12th
  • the hold-down rail 10 comprises an extension 14 of the press leg 11 which is remote from the axis 7 and has a guide pin 13 which protrudes vertically from the sheet support 3.
  • the extension 14 is subjected to a force on the underside by a compression spring 15 in the upward direction. Between the upper side of the extension 14 and the upper end of the guide pin 13 designed as a stop 16, it is enclosed by one end of a force-amplifying lever 17. About the compression spring 15 of the power boost lever 17 is pressed against the stopper 16.
  • the power boost lever 17 initially extends a short distance parallel to the press leg 11 of the hold-down rail 10 and then kinks in the manner of a toggle lever obliquely upward to form an actuating portion 18 from.
  • the hold-down rail 10 rests at the end adjacent to the axis 7 on a compression spring 19, which - like the compression spring 15 - the hold-down rail 10 in a raised, in FIG. 1 to recognize the starting position holds, in which the press leg 11 to form a gap 20 distance to the Blattgutauflage 3 has.
  • a bending spring 21 is arranged, the upper bending leg 22 is supported on the cutting lever 5 and the lower bending leg 23 rests against the upper side of the pressing leg 11.
  • the lower bending leg 23 exerts almost no force on the hold-down rail 10, so that its position is determined by the compression spring 19.
  • the sheet material - whether in the form of a single sheet or a stack of sheets - placed on the Blattgutauflage 3 and pushed through the gap 20 so far that the cut off part of the sheet material protrudes freely on the counter blade 9.
  • the hold-down rail 10 is lowered onto the sheet material by the operating portion 18 of the power arm 17 is pressed down by hand.
  • the press leg 11 of the hold-down rail 10 in the region of the knee 24 with high force down pressed and thereby pressed the sheet material against the Blattgutauflage 3 and fixed.
  • the bending spring 21 Since the bending spring 21 is stiffer than the compression spring 19, it overcomes their spring force. Overall, this causes the hold-down rail 10 is pressed with such force on the stack of sheets that it does not come to a shift of the individual sheets with each other during the cutting process. If only a few or a single sheet is cut, the force exerted by the bending spring 21 is sufficient to achieve a fixation via the hold-down rail 10.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)

Abstract

The device has a holding-down device (10) arranged for pressing sheets on a sheet support. The device (10) is movable between a raised initial position and press position in the direction of the sheet support. The device (10) is loaded on a force intensifying lever (17) in the direction of the press position, and is hand operable such that the exercised force is strengthened and transferred to the device (10).

Description

Die Erfindung betrifft ein Schneidgerät zum Beschneiden von Blattgut mit einer Blattgutauflage und mit wenigstens einer Schneideinrichtung, benachbart zu der ein Niederhalter zum Anpressen des Blattguts auf die Blattgutauflage angeordnet ist, wobei der Niederhalter zwischen einer angehobenen Ausgangsstellung und einer in Richtung auf die Blattgutauflage versetzten Preßstellung bewegbar ist und von einem Kraftverstärkungshebel in Richtung auf die Preßstellung beaufschlagt ist, der derart von Hand betätigbar ist, daß die dabei ausgeübte Kraft verstärkt auf den Niederhalter übertragen wird.The invention relates to a cutting device for trimming sheet material with a Blattgutauflage and at least one cutting device, adjacent to a hold down for pressing the sheet material is arranged on the Blattgutauflage, wherein the hold-down between a raised starting position and a displaced in the direction of the Blattgutauflage pressing position movable is and is acted upon by a force-boosting lever in the direction of the pressing position, which is operable by hand, that the force exerted thereby is increasingly transmitted to the hold-down.

Schneidgeräte der vorgenannten Art sind in vielfältigen Ausführungsformen bekannt und werden vornehmlich im Bürobereich eingesetzt, um Blattgut einzeln oder in gestapelter Form auf ein gewünschtes Maß zu bringen. Bei Blattgut kann es sich um Papierblätter, Fotopapier, Karton, aber auch Folien handeln.Cutters of the aforementioned type are known in various embodiments and are used primarily in the office sector to bring sheet material individually or in a stacked form to a desired level. Sheet material can be paper sheets, photo paper, cardboard, but also foils.

Die Schneidgeräte haben generell den gleichen Grundaufbau. Sie haben eine Blattgutauflage, die aus einem Rahmen meist rechteckigen Grundrisses und einer obenseitigen, sich horizontal erstreckenden Platte besteht. An einer Seite der Blattgutauflage ist eine Schneideinrichtung angeordnet. Weit verbreitet sind Hebelschneideinrichtungen, die einen an einem Ende der Schneideinrichtung um eine horizontale Achse schwenkbar gelagerten Schneidhebel aufweisen, der untenseitig ein Schneidmesser mit Schneidkante und an seinem äußeren Ende einen Handgriff aufweist. Zur Schneideinrichtung gehört ein an der Blattgutauflage angebrachtes oder von ihr gebildetes Gegenmesser mit einer sich horizontal erstreckenden Schneidkante.The cutters generally have the same basic structure. You have a Blattgutauflage, which consists of a frame mostly rectangular plan and a topside, extending horizontally plate. On one side of the Blattgutauflage a cutter is arranged. Lever cutting devices are widely used, the one at one end of the cutting device about a horizontal axis pivotally mounted cutting lever having a cutting blade with cutting edge at the bottom and a handle at its outer end. The cutting device includes a mounted on the Blattgutauflage or formed by her counter knife with a horizontally extending cutting edge.

Statt einer Hebelschneideinrichtung kann auch eine Rollenschneideinrichtung vorgesehen sein (vgl. US 2002/0092396 A1 ). Bei dieser Art Schneideinrichtung ist ein Messerwagen auf einer oberhalb der Blattgutauflage angeordneten Führungsschiene verschieblich gelagert. Der Messerwagen hat ein um eine horizontale Achse drehbar gelagertes Scheibenmesser, welches aus einer angehobenen Ausgangsstellung gegen einen als Gegenmesser fungierenden Schneidstreifen gepreßt werden kann.Instead of a lever cutting device, a roller cutting device can also be provided (cf. US 2002/0092396 A1 ). In this type of cutting device, a knife carriage is mounted displaceably on a guide rail arranged above the sheet material support. The knife carriage has a disc knife rotatably mounted about a horizontal axis, which can be pressed from a raised starting position against a cutting strip acting as a counter knife.

Darüber hinaus gibt es auch Schneidgeräte, die an einer Seite eine Hebelschneideinrichtung und an der gegenüberliegenden Seite eine Rollenschneideinrichtung aufweisen, um jeweils eine für die Art des zu beschneidenden Blattgutes optimale Schneideinrichtung zur Verfügung zu haben, ohne daß hierfür die Anschaffung zweier Schneidgeräte notwendig ist (vgl. EP 1 475 201 A1 ).In addition, there are also cutters having on one side of a lever cutting device and on the opposite side a roller cutting device to each have an optimal for the type of material to be trimmed cutting device available without requiring the purchase of two cutters is necessary (see , EP 1 475 201 A1 ).

Für den Schneidvorgang wird das Blattgut auf die Blattgutauflage aufgelegt und dabei in die Schneideinrichtung soweit hinein geschoben, daß der abzuschneidende Teil des Blattgutes über das Gegenmesser hinaus vorsteht. Bei einer Hebelschneideinrichtung wird dann der zunächst hochgeschwenkte Schneidarm nach unten verschwenkt, wobei die Schneidkante seines Schneidmessers an der Schneidkante des Gegenmessers vorbeireibt und auf diese Weise das Blattgut beschneidet. Bei einer Rollenschneideinrichtung wird der zunächst auf einer Seite der Führungsschiene sitzende Messerwagen mit dem Scheibenmesser gegen den Schneidstreifen heruntergedrückt und dann längs der Schiene verfahren. Dabei rollt das Scheibenmesser über den Schneidstreifen und trennt den überstehenden Teil des Blattgutes ab.For the cutting process, the sheet material is placed on the Blattgutauflage and thereby pushed into the cutting device far enough that the part to be cut off the Leaves good over the counter knife projecting out. In a lever cutting device, the first tilted cutting arm is then pivoted down, the cutting edge of his cutting knife past the cutting edge of the counter knife and thus cuts the sheet material. In a roll cutting device, the knife carriage, which is initially seated on one side of the guide rail, is pressed down with the disk knife against the cutting strip and then moved along the rail. The disc knife rolls over the cutting strip and separates the protruding part of the sheet material.

Um das Blattgut in der Schneidstellung auf der Blattgutauflage besser fixieren zu können, wird es während des Beschneidungsvorgangs mittels eines auf das Blattgut von Hand aufgepreßten Niederhalters gegen die Blattgutauflage gepreßt. Bei Hebelschneideinrichtungen ist der Niederhalter als im Querschnitt L-förmige Niederhalterschiene ausgebildet, die an beiden Enden an senkrecht stehenden Haltebolzen vertikal verschieblich geführt ist. Mittels Federn wird die Niederhalterschiene in einer angehobenen Ausgangsstellung gehalten, in der die Niederhalterschiene Abstand zu der Blattgutauflage und zu dem Gegenmesser hat, so daß das zu beschneidende Blattgut unter der Niederhalterschiene hindurch geschoben werden kann. Die Niederhalterschiene hat einen waagerechten Schenkel, über den die Niederhalterschiene für den Beschneidvorgang nach unten gegen das Blattgut und gegen die Wirkung der vorgenannten Federn gedrückt werden kann. Ein von dem waagerechten Schenkel an der dem Schneidhebel benachbarten Seite hochstehender Schenkel dient dabei dem Schutz der Hand vor dem Schneidhebel. Bei Rollenschneideinrichtungen dient die Führungsschiene für den Messerwagen als Niederhalterschiene und ist demgemäß an beiden Enden vertikal verschieblich oder auch verschwenkbar oder nur an einem Ende verschwenkbar gelagert und kann so aus einer'angehobenen Ausgangsstellung nach Durchschieben des Blattgutes gegen das Blattgut gepreßt werden. Mittels einer Rasteinrichtung kann die Niederhalterschiene dann in dieser Stellung fixiert werden, so daß sie während des Verschiebens des Messerwagens nicht mehr von Hand beaufschlagt werden muß.In order to better fix the sheet material in the cutting position on the Blattgutauflage, it is pressed during the Beschneidungsvorgangs by means of a pressed onto the sheet material by hand hold against the Blattgutauflage. When lever cutting devices of the hold-down is designed as a cross-sectionally L-shaped hold-down rail, which is guided vertically displaceably at both ends of vertical retaining bolts. By means of springs, the hold-down rail is held in a raised starting position, in which the hold-down rail distance to the Blattgutauflage and to the counter knife, so that the sheet material to be trimmed can be pushed under the hold-down rail. The hold-down rail has a horizontal leg over which the hold-down rail for the trimming down against the sheet material and against the action of the aforementioned Springs can be pressed. One of the horizontal leg at the side adjacent to the cutting lever side upstanding leg serves to protect the hand in front of the cutting lever. In slitter-cutting devices, the guide rail for the knife carriage serves as a hold-down rail and is thus mounted vertically displaceable or pivotable at both ends or pivoted only at one end and can be pressed from an''high raised starting position after pushing the sheet material against the sheet material. By means of a locking device, the hold-down rail can then be fixed in this position, so that they no longer have to be applied by hand during the displacement of the knife carriage.

Insbesondere die Hebelschneideinrichtungen sind dazu geeignet, einen Blattgutstapel aus einer Vielzahl von Blättern gleichzeitig durch eine einzige Schneidbewegung des Schneidhebels zu beschneiden. In diesen Fällen reicht die durch die Hand der Bedienungsperson auf den Niederhalter ausgeübte Kraft häufig nicht aus, um der bei der Beschneidung entstehenden Tendenz zur gegenseitigen Verschiebung der Blätter des Blattgutstapels entgegenzuwirken. Der Blattgutstapel wird dann schräg beschnitten, mit der Folge, daß die beschnittenen Blätter nicht gleichgroß sind.In particular, the lever cutting devices are suitable for simultaneously cutting a sheet material stack of a plurality of sheets by a single cutting movement of the cutting lever. In these cases, the force exerted by the operator's hand on the hold down force is often insufficient to counteract the tendency of the circumcision to mutually shift the sheets of sheet stock pile. The sheet stack is then trimmed at an angle, with the result that the trimmed sheets are not the same size.

Um auf einen Blattstapel höhere Kräfte einwirken zu lassen, sind Niederhalter entwickelt worden, die die von einer Bedienungsperson aufwendete Kraft verstärken. Bei dem Niederhalter bei der FR 653 378 ist oberhalb des und parallel zu dem Niederhalter eine welle gelagert, die mittels eines Hebels in Drehbewegung versetzt werden kann. Auf der Welle sind Nocken ausgeformt, die bei einer Drehbewegung der Welle in Kontakt mit dem Niederhalter kommen und ihn auf einen Blattstapel pressen. Um noch größere Kräfte einwirken zu lassen, sind komplizierte Hebelkonstruktionen entwickelt worden, wie sie der US 3 497 203 A und der DE 20 2004 011 728 U1 zu entnehmen sind. Die Kraftverstärkung wird durch einen Hebel bewirkt, der über eine Mehrzahl von Laschen auf einen Niederhalter kraftverstärkend wirkt.In order to allow higher forces to act on a stack of sheets, hold-downs have been developed, the one of a Operator spent strength to strengthen. In the holddown at the FR 653 378 is mounted above and parallel to the hold-down a shaft which can be rotated by means of a lever in rotary motion. On the shaft cams are formed, which come with a rotational movement of the shaft in contact with the hold-down and press it onto a stack of sheets. In order to let even greater forces act, complicated lever designs have been developed as the US Pat. No. 3,497,203 and the DE 20 2004 011 728 U1 can be seen. The power amplification is effected by a lever which acts force-enhancing over a plurality of tabs on a hold-down.

Der Erfindung liegt die Aufgabe zugrunde, ein Schneidgerät der eingangs genannten Art derart auszubilden, daß es beim Beschneiden auch dickerer Blattgutstapel nicht zu einer Verschiebung der Blätter des Blattgutstapels untereinander kommt.The invention has the object of providing a cutting device of the type mentioned in such a way that it does not come to a displacement of the leaves of the sheet stack with each other when trimming and thicker Blattgutstapel.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der Kraftverstärkungshebel nach Art eines Kniehebels ausgebildet ist und unter Bildung eines Knies abknickt, das den Niederhalter beaufschlagt. Grundgedanke der Erfindung ist es also, einen besonderen, nach Art eines Kniehebels ausgebildeten Kraftverstärkungshebel vorzusehen, der mit seinem Knie den Niederhalter beaufschlagt, so daß die Handkraft der Bedienungsperson nicht direkt auf den Niederhalter einwirkt, sondern über den Kraftverstärkungshebel mit der Folge, daß die Handkraft entsprechend den jeweiligen Hebelverhältnissen verstärkt wird und damit der Blattgutstapel mit einer wesentlich stärkeren, von Hand kaum oder nicht ausübbaren Kraft auf die Blattgutauflage aufgepreßt wird. Durch die vergrößerte Preßkraft wird eine gegenseitige Verschiebung der Blätter des Blattgutstapels vermieden, und es können auch dickere Blattgutstapel in einem Arbeitsgang präzise und mit identischen Resultaten beschnitten werden.This object is achieved in that the power boost lever is designed in the manner of a toggle lever and kinks to form a knee that acts on the hold-down. The basic idea of the invention is therefore to provide a special, designed in the manner of a toggle lever amplifying lever which acts with his knee the hold-down, so that the manual force of the operator does not act directly on the hold, but on the power boost lever with the result that the hand force according to the respective Leverage ratios is enhanced and thus the sheet stack is pressed with a much stronger, by hand barely or not exercisable force on the Blattgutauflage. Due to the increased pressing force mutual displacement of the leaves of the stack of sheet material is avoided, and it can be cut precisely and with identical results in a single operation and thicker Blattgutstapel.

Der Kraftverstärkungshebel ist vor allem für Niederhalter geeignet, die in an sich bekannter weise als sich parallel zur Schneideinrichtung erstreckende Niederhalterschienen ausgebildet ist, die zweckmäßigerweise an zumindest einem Ende, vorzugsweise an beiden Enden, beweglich geführt sind und dort auch mittels Federkraft in der Ausgangsstellung gehalten werden. Solche Niederhalterschienen sind vor allem bei Hebelschneideinrichtungen vorhanden. Dies schließt jedoch nicht aus, daß als Niederhalterschiene auch die Führungsschiene für den Messerwagen bei Rollenschneideinrichtungen verwendet wird und demgemäß diese Führungsschiene mit dem erfindungsgemäßen Kraftverstärkungshebel beaufschlagt wird.The power boost lever is particularly suitable for hold-down, which is formed in a conventional manner as parallel to the cutting device extending hold-down rails, which are conveniently guided on at least one end, preferably at both ends, movable and held there by spring force in the starting position , Such hold-down rails are available especially with lever cutting devices. However, this does not exclude that as a hold-down rail, the guide rail for the blade carriage is used in slitter and thus this guide rail is acted upon by the power boosting lever according to the invention.

Der Kraftverstärkungshebel sollte im Bereich des einen Endes der Schneideinrichtung schwenkbar gelagert sein, vorzugsweise so, daß der Kraftverstärkungshebel zusammen mit einem Ende der Niederhalterschiene beweglich geführt ist. Dabei bietet es sich an, daß sich der Kraftverstärkungshebel von dem einen Ende der Niederhalterschiene längs der Niederhalterschiene erstreckt. In besonderer Ausbildung ist vorgesehen, daß Kraftverstärkungshebel und darunter Niederhalterschiene auf einem Führungsbolzen mit untenseitigem Anschlag für die Niederhalterschiene und mit obenseitigem Anschlag für den Kraftverstärkungshebel sitzen.The power boost lever should be pivotally mounted in the region of one end of the cutter, preferably so that the power boost lever is movably guided together with one end of the hold-down rail. It is advisable that the power boost lever from the one end of the hold-down rail extends along the hold-down rail. In a special embodiment it is provided that power boost lever and lower holding rail sit on a guide pin with untenseitigem stop for the hold-down rail and topside stop for the power boost lever.

Der Kniehebel erstreckt sich vorzugsweise im wesentlichen zunächst parallel zu dem Niederhalter und biegt dann am Knie schräg nach oben in einem für die Betätigung durch die Bedienungsperson geeigneten Winkel weg.The toggle lever preferably extends substantially parallel to the holddown initially and then bends obliquely upward at the knee in an angle suitable for operation by the operator.

Sofern die Schneideinrichtung als Hebelschneideinrichtung ausgebildet ist, die einen schwenkbar gelagerten Schneidhebel aufweist, ist des weiteren vorgeschlagen, daß der Schneidhebel beim Schneidvorgang den Niederhalter über eine Feder in Preßrichtung beaufschlagt, um über den Schneidhebel eine Preßkraft auf den Niederhalter auszuüben. Dabei kann der Kraftverstärkungshebel im Bereich des einen Endes der Schneideinrichtung und der Schneidhebel an dem anderen Ende der Schneideinrichtung gelagert sein, so daß Kräfte auf beiden Seiten des Niederhalters ausgeübt werden. Die Feder ist dann zweckmäßigerweise im Bereich der Lagerung des Schneidhebels angeordnet.If the cutting device is designed as a lever cutting device, which has a pivotally mounted cutting lever has further proposed that the cutting lever during the cutting process, the hold-down is acted upon by a spring in the pressing direction to exert a pressing force on the hold-down over the cutting lever. In this case, the power-boosting lever may be mounted in the region of the one end of the cutting device and the cutting lever at the other end of the cutting device, so that forces are exerted on both sides of the blank holder. The spring is then expediently arranged in the region of the bearing of the cutting lever.

In der Zeichnung ist die Erfindung anhand eines Ausführungsbeispiels näher veranschaulicht. Es zeigen:

Figur 1
das erfindungsgemäße Schneidgerät in einer Seitenansicht und
Figur 2
das Schneidgerät gemäß Figur 1 in der Draufsicht.
In the drawing, the invention with reference to an embodiment is illustrated in more detail. Show it:
FIG. 1
the cutting device according to the invention in a side view and
FIG. 2
the cutter according to FIG. 1 in the plan view.

Das in den Figuren dargestellte Schneidgerät 1 weist einen Geräterahmen 2 in etwa rechteckigen Grundrisses auf, der obenseitig eine sich horizontal erstreckende Blattgutauflage 3 aufweist, die in Figur 2 nur teilweise dargestellt ist. An einer Seite der Blattgutauflage 3 ist eine Hebelschneideinrichtung 4 vorgesehen. Sie weist einen Schneidhebel 5 mit untenseitigem Schneidmesser 6 auf, der an einem Ende über eine sich horizontal erstreckende Achse 7 schwenkbar gelagert ist. Am freien Ende bildet der Schneidhebel 5 einen Handgriff 8 aus, über den der Schneidhebel 5 für einen Schneidvorgang aus der gezeigten angehobenen Stellung nach unten in eine waagerechte Stellung verschwenkt werden kann. Dabei reibt das Schneidmesser 6 an einer Kante der Blattgutauflage 3 vorbei, die als Gegenmesser 9 dient.The cutting device 1 shown in the figures has a device frame 2 in an approximately rectangular plan, the top side has a horizontally extending Blattgutauflage 3, the in FIG. 2 only partially shown. On one side of the Blattgutauflage 3 a lever cutting device 4 is provided. It has a cutting lever 5 with bottom-side cutting blade 6, which is pivotally mounted at one end via a horizontally extending axis 7. At the free end forms the cutting lever 5 from a handle 8, via which the cutting lever 5 can be pivoted for a cutting operation from the raised position shown down in a horizontal position. The cutting blade 6 rubs past an edge of the Blattgutauflage 3, which serves as a counter knife 9.

Oberhalb der Blattgutauflage 3 und parallel zum Gegenmesser 9 erstreckt sich eine Niederhalterschiene 10 nahezu über die gesamte Länge der Hebelschneideinrichtung 4. Die Niederhalteschiene 10 hat einen L-förmigen Querschnitt mit einem waagerechten Preßschenkel 11 und einem davon an der dem Schneidmesser 6 benachbarten Seite senkrecht hochstehenden Schutzschenkel 12.Above the Blattgutauflage 3 and parallel to the counter knife 9, a hold-down rail 10 extends almost over the entire length of the lever cutter 4. The hold-down rail 10 has an L-shaped cross-section with a horizontal press leg 11 and one of which on the cutting blade 6 adjacent side vertically upstanding protective leg 12th

Die Niederhalterschiene 10 umfaßt mit einem der Achse 7 entfernt liegenden Fortsatz 14 des Preßschenkels 11 einen senkrecht von der Blattgutauflage 3 hochstehenden Führungsbolzen 13. Der Fortsatz 14 ist untenseitig von einer Druckfeder 15 in Richtung nach oben kraftbeaufschlagt. Zwischen der Oberseite des Fortsatzes 14 und dem oberen, als Anschlag 16 ausgebildeten Ende des Führungsbolzens 13 wird dieser von dem einen Ende eines Kraftverstärkungshebels 17 umschlossen. Über die Druckfeder 15 wird der Kraftverstärkungshebel 17 gegen den Anschlag 16 gepreßt. Der Kraftverstärkungshebel 17 erstreckt sich zunächst ein kurzes Stück parallel zu dem Preßschenkel 11 der Niederhalterschiene 10 und knickt dann nach Art eines Kniehebels schräg nach oben unter Bildung eines Betätigungsabschnittes 18 ab.The hold-down rail 10 comprises an extension 14 of the press leg 11 which is remote from the axis 7 and has a guide pin 13 which protrudes vertically from the sheet support 3. The extension 14 is subjected to a force on the underside by a compression spring 15 in the upward direction. Between the upper side of the extension 14 and the upper end of the guide pin 13 designed as a stop 16, it is enclosed by one end of a force-amplifying lever 17. About the compression spring 15 of the power boost lever 17 is pressed against the stopper 16. The power boost lever 17 initially extends a short distance parallel to the press leg 11 of the hold-down rail 10 and then kinks in the manner of a toggle lever obliquely upward to form an actuating portion 18 from.

Die Niederhalterschiene 10 ruht an dem der Achse 7 benachbarten Ende auf einer Druckfeder 19, die - wie die Druckfeder 15 - die Niederhalterschiene 10 in einer angehobenen, in Figur 1 zu erkennenden Ausgangsstellung hält, in der der Preßschenkel 11 unter Bildung eines Spaltes 20 Abstand zu der Blattgutauflage 3 hat. An dem Schneidhebel 5 ist eine Biegefeder 21 angeordnet, deren oberer Biegeschenkel 22 sich an dem Schneidhebel 5 abstützt und deren unterer Biegeschenkel 23 an der Oberseite des Preßschenkels 11 anliegt. In der in Figur 1 dargestellten angehobenen Stellung des Schneidhebels 5 übt der untere Biegeschenkel 23 nahezu keine Kraft auf die Niederhalterschiene 10 aus, so daß dessen Stellung durch die Druckfeder 19 bestimmt wird.The hold-down rail 10 rests at the end adjacent to the axis 7 on a compression spring 19, which - like the compression spring 15 - the hold-down rail 10 in a raised, in FIG. 1 to recognize the starting position holds, in which the press leg 11 to form a gap 20 distance to the Blattgutauflage 3 has. At the cutting lever 5, a bending spring 21 is arranged, the upper bending leg 22 is supported on the cutting lever 5 and the lower bending leg 23 rests against the upper side of the pressing leg 11. In the in FIG. 1 shown raised position of the cutting lever 5, the lower bending leg 23 exerts almost no force on the hold-down rail 10, so that its position is determined by the compression spring 19.

Für den Schneidvorgang wird das Blattgut - sei es in Form eines Einzelblattes oder eines Blattstapels - auf die Blattgutauflage 3 aufgelegt und durch den Spalt 20 soweit hindurchgeschoben, daß der abzuschneidende Teil des Blattgutes über das Gegenmesser 9 frei vorsteht. Bei Bedarf, insbesondere zum Beschneiden eines Blattstapels, wird die Niederhalterschiene 10 auf das Blattgut abgesenkt, indem der Betätigungsabschnitt 18 des Kraftverstärkungshebels 17 von Hand nach unten gedrückt wird. Hierdurch wird der Preßschenkel 11 der Niederhalterschiene 10 im Bereich des Knies 24 mit hoher Kraft nach unten gepreßt und dadurch das Blattgut gegen die Blattgutauflage 3 gepreßt und fixiert. Beim Verschwenken des Schneidhebels 5 nach unten wird auf den Preßschenkel 11 zusätzlich mittels der Biegefeder 21 Kraft in Richtung auf die Blattgutauflage 3 ausgeübt. Da die Biegefeder 21 steifer ist als die Druckfeder 19 überwindet sie deren Federkraft. Insgesamt wird hierdurch die Niederhalterschiene 10 mit einer solchen Kraft auf den Blattstapel gedrückt, daß es beim Schneidvorgang nicht zu einer Verschiebung der Einzelblätter untereinander kommt. Werden nur wenige oder ein einzelnes Blatt beschnitten, reicht die von der Biegefeder 21 ausgeübte Kraft aus, um eine Fixierung über die Niederhalterschiene 10 zu erreichen.For the cutting process, the sheet material - whether in the form of a single sheet or a stack of sheets - placed on the Blattgutauflage 3 and pushed through the gap 20 so far that the cut off part of the sheet material protrudes freely on the counter blade 9. If necessary, in particular for trimming a sheet stack, the hold-down rail 10 is lowered onto the sheet material by the operating portion 18 of the power arm 17 is pressed down by hand. As a result, the press leg 11 of the hold-down rail 10 in the region of the knee 24 with high force down pressed and thereby pressed the sheet material against the Blattgutauflage 3 and fixed. When pivoting the cutting lever 5 downward force is exerted on the press leg 11 in addition by means of the bending spring 21 in the direction of the Blattgutauflage 3. Since the bending spring 21 is stiffer than the compression spring 19, it overcomes their spring force. Overall, this causes the hold-down rail 10 is pressed with such force on the stack of sheets that it does not come to a shift of the individual sheets with each other during the cutting process. If only a few or a single sheet is cut, the force exerted by the bending spring 21 is sufficient to achieve a fixation via the hold-down rail 10.

Claims (13)

  1. A cutting unit (1) for trimming sheet material, having a sheet material support (3) and having at least one cutting device (4) adjacent to which is arranged a holddown (10) for pressing the sheet material onto the sheet material support (3), the holddown (10) being movable between a raised initial position and a pressing position offset toward the sheet material support (3), and is acted upon in the direction toward the pressing position by a force intensification lever (17) which is manually actuable in such a way that the force exerted in that context is transferred in intensified fashion to the holddown (10), characterized in that the force intensification lever (17) is embodied in the manner of an elbow lever and bends forming an elbow which acts upon the holddown (10).
  2. The cutting unit according to Claim 1, characterized in that the holddown is embodied as a holddown bar (10) extending parallel to the cutting device (4).
  3. The cutting unit according to Claim 2, characterized in that the holddown bar (10) is movably guided at at least one end.
  4. The cutting unit according to Claim 3, characterized in that the holddown bar (10) is movably guided at both ends.
  5. The cutting unit according one of Claims 1 to 4, characterized in that the holddown (10) is retained in the initial position by means of spring force.
  6. The cutting unit according to one of Claims 1 to 5, characterized in that the force intensification lever (17) is mounted pivotably in the region of the one end of the cutting device (4).
  7. The cutting unit according to one of Claims 2 to 6, characterized in that the force intensification lever (17) is movably guided together with one end of the holddown bar (10).
  8. The cutting unit according to one of Claims 2 to 7, characterized in that the force intensification lever (17) extends along the holddown bar (10).
  9. The cutting unit according to Claim 7, characterized in that the force intensification lever (17) and the holddown bar (10) thereabove sit on a guide stud (13) having a stop at the bottom for the holddown bar (10) and a stop at the top for the force intensification lever (17).
  10. The cutting unit according to Claim 9, characterized in that the force intensification lever (17) initially extends substantially parallel to the holddown (10), and bends out obliquely upward from the elbow.
  11. The cutting unit according to one of Claims 1 to 10, characterized in that the cutting device (4) is embodied as a guillotine cutting device that comprises a pivotably mounted cutting lever (5) that, during the cutting operation, acts upon the holddown (10) in the pressing direction via a spring (21).
  12. The cutting unit according to Claim 11, characterized in that the force intensification lever (17) is mounted in the region of the one end of the cutting device (4), and the cutting lever (5) is mounted at the other end of the cutting device (4).
  13. The cutting unit according to Claim 11 or 12, characterized in that the spring (21) is arranged in the region of the mounting point of the cutting lever (5).
EP20060016305 2005-08-18 2006-08-04 Cutting device for sheets Not-in-force EP1754578B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202005013195U DE202005013195U1 (en) 2005-08-18 2005-08-18 Cutting device for shearing off e.g. paper sheets, has holding-down device loaded on force intensifying lever in direction of press position and hand operable so that exercised force is strengthened and transferred to holding-down device

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EP1754578A1 EP1754578A1 (en) 2007-02-21
EP1754578B1 true EP1754578B1 (en) 2008-07-23

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US (1) US20070039442A1 (en)
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AT (1) ATE402000T1 (en)
DE (2) DE202005013195U1 (en)

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DE202007002546U1 (en) * 2007-02-21 2008-07-03 Dahle Bürotechnik Gmbh Guillotine cutting machine
DE202007015983U1 (en) 2007-11-14 2008-12-24 Monolith GmbH Bürosysteme Office device for punching sheet material
DE202007015981U1 (en) 2007-11-14 2008-12-24 Monolith GmbH Bürosysteme Office device for processing sheet material
CN104476593B (en) * 2014-11-19 2016-02-17 辽宁科技大学 The light chopper of a kind of vibration damping
CN106272634A (en) * 2016-08-04 2017-01-04 江苏中大包装材料有限公司 A kind of Novel paper cutter
CN107498597A (en) * 2017-10-24 2017-12-22 信阳农林学院 A kind of Chinese medicine slicing device
CN117301151A (en) * 2018-05-31 2023-12-29 北京市设备安装工程集团有限公司 Air pipe flange sealing gasket cutting tool

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DE502006001174D1 (en) 2008-09-04
EP1754578A1 (en) 2007-02-21
US20070039442A1 (en) 2007-02-22
ATE402000T1 (en) 2008-08-15
DE202005013195U1 (en) 2005-10-27

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