EP0740983B1 - Three side cutter - Google Patents

Three side cutter Download PDF

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Publication number
EP0740983B1
EP0740983B1 EP96106902A EP96106902A EP0740983B1 EP 0740983 B1 EP0740983 B1 EP 0740983B1 EP 96106902 A EP96106902 A EP 96106902A EP 96106902 A EP96106902 A EP 96106902A EP 0740983 B1 EP0740983 B1 EP 0740983B1
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EP
European Patent Office
Prior art keywords
knife
trimmer according
trimming
control computer
servo
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96106902A
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German (de)
French (fr)
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EP0740983A1 (en
Inventor
Thorsten Dr. Ing. Müller
Gerd Dipl.-Ing. Peters
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Wohlenberg Vertriebs- und Service GmbH
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Wohlenberg Vertriebs- und Service GmbH
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Publication of EP0740983A1 publication Critical patent/EP0740983A1/en
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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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/20—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting with interrelated action between the cutting member and work feed
    • 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
    • B26D1/04—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 linearly-movable cutting member
    • B26D1/06—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 linearly-movable cutting member wherein the cutting member reciprocates
    • B26D1/08—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 linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type
    • B26D1/09—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 linearly-movable cutting member wherein the cutting member reciprocates of the guillotine type with a plurality of cutting members
    • 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
    • B26D11/00—Combinations of several similar cutting apparatus
    • 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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • 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
    • B26D2007/0081—Cutting on three sides, e.g. trilateral trimming
    • 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
    • B26D5/00—Arrangements for operating and controlling machines or devices for cutting, cutting-out, stamping-out, punching, perforating, or severing by means other than cutting
    • B26D5/08—Means for actuating the cutting member to effect the cut
    • B26D5/14—Crank and pin means

Definitions

  • the invention relates to a three-knife trimmer according to the preamble of claim 1.
  • a triple cutter is one used in the bookbinding industry Cutting device, the three cutting knives, namely includes a front knife and two side knives.
  • One Such three-knife trimmers are used to feed books fed that are already tied to the back. The The job of the trimmer is to read the books the sides and on the front edge in one operation cut to the final desired format.
  • the drive of such a three-cutter includes one with constant speed, continuously running rotor Electric motor, e.g. B. a three-phase motor or DC motor with a flywheel, a common drive shaft, that with the electric motor via a controllable Clutch or clutch-brake combination can be connected is, as well as several uniformly or non-uniformly translating Gearboxes, all with the common drive shaft are mechanically coupled.
  • rotor Electric motor e.g. B. a three-phase motor or DC motor with a flywheel, a common drive shaft, that with the electric motor via a controllable Clutch or clutch-brake combination can be connected is, as well as several uniformly or non-uniformly translating Gearboxes, all with the common drive shaft are mechanically coupled.
  • the coupling of the movements and the speed of movement of the moving parts in the individual stations is due to the design of the drive fixed and not changeable. This makes the three-knife trimmer run only economically at maximum operating height, the economy increases as the amount of use decreases from.
  • the coupling elements claim a significant space within the machine body of the three-knife trimmer and their respective arrangement is constructive due to the position of the parts to be moved given to the individual stations. This allows other parts, such as B. suction and discharge devices not optimally designed for cutting waste.
  • the invention has for its object in a three-knife a precise, variable coupling of those to be moved Allow parts to meet the requirements for economical operation even with variable heights to create and the mechanical effort and Space required for the coupling elements in favor of an optimal one Possibility of arranging suction and discharge devices to reduce cutting waste.
  • the motors can be servo or stepper motors arrange each directly on the parts to be moved. Coupling elements that were previously required to the parts to be moved with the single drive shaft couple, are not necessary. By eliminating the coupling elements can suction and discharge devices for Cutting waste better at the place where the cutting waste is created arrange and design for effective removal.
  • the movements and the speed of movement parts to be moved can be varied by the control computer be controlled around an economical way of working to secure all operating conditions. Furthermore, between an exact synchronization of the parts to be moved possible, so that the movements optimally on each other can be coordinated.
  • the ram as well optionally also the feed station, the Transfer station and the boom with separate drives equipped, so there is also the possibility To optimize guidance and application of force to the press ram and otherwise the performance of the servo or Stepper motors individually to the power and power requirements to adapt the relevant parts to be moved. This is an economical manufacture and a economical operation possible.
  • the drives can be rotary servo or stepper motors with downstream uniform or non-uniform include gearboxes.
  • drives are linear Servo or stepper motors include.
  • the drive of the linearly moving movable Parts take place immediately, so that a gear for There is no need to convert a rotary movement into a linear movement can.
  • top dead center of the front knife and the two side knives the control computer depending on the amount of use of the Cuttings can be controlled so that the idle stroke is reduced becomes.
  • Another measure to reduce cycle times and Improving the cutting performance is that Start time of the work movements of the press ram, the Front knife and the side knife by the control computer depending on the previous work movements to control so that the breaks between successive Work movements are reduced.
  • the press ram is expediently used by the control computer with constant force throughout the cutting process acted upon. This characteristic also leads to one conventional three-knife trimmer to an improved one Cut quality. So far, the pressing has been over generates a crank drive with a balance spring, but what in the beginning and end phase of the cutting process only a lower pressure allowed, so that when cutting of a stack of sheets could slip. Due to the further development according to the invention, this quality weakness becomes now effectively eliminated.
  • the maximum power is preferably the servo or Measure the stepper motors for the knives just large enough that the sum of the maximum motor driving force and the inertia occurring during the cutting process Knives including the parts moving with them straight greater than the maximum force peaks that occur when Cutting process.
  • the suction device comprises for cutting waste one below a cutting table the cutting station arranged at the cutting station.
  • FIG. 1 and 2 A feed station shows individual stations of a three-cutter 10, a transfer station 12, a cutting station 14 and a delivery belt 16.
  • Bound books enter the feed station 10 Magazine 18. There the books are in the transfer station 12 individually below from the magazine 18 through on a revolving Conveyor chain 20 attached driver 22 removed and moved towards the cutting station 14. In front The books are reached by the cutting position a pendulum positioning device 24 is detected and in transferred the cutting position to a cutting table 26, while the carriers 22 of the conveyor chain 20 down dive away.
  • the final Format cropped books captured by outrigger and on the delivery belt 16 transported.
  • the cutting station 14 also includes a cutting table 26 a cutting plate 28 and cutting strips 30 and three Knives, namely two side knives 32, 34 and a front knife 36.
  • the side knives 32, 34 and the front knife 36 are each in a knife holder, the Side knife holder in turn on a side knife bar attached and guided.
  • Fixing device not shown, part of the Cutting station 14, which is used during the book stack to fix the cutting process on the cutting plate 28, so that the stack as a whole or individual pages don't slip.
  • Suction device for cutting waste with a shredder.
  • the two side knives 32, 34 on the one hand and the front knife 36 on the other hand by separate drives moves, the digital bidirectionally controlled servo motors 38; 40 with downstream non-uniformly translating Gear 42; 44 include.
  • the conveyor chain 20 and the oscillating positioning device 24 by separate Drives with digitally controlled servo motors 46; 48 moves.
  • the drive of the conveyor chain also includes a uniformly translating gear 50, during the Drive of the positioning device is non-uniform translating gear 52 includes.
  • the movements of the servomotors 38, 40, 46, 48 are replaced by a common one Control computer controlled and synchronized precisely.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Details Of Cutting Devices (AREA)
  • Nonmetal Cutting Devices (AREA)

Description

Die Erfindung betrifft einen Dreischneider nach dem Oberbegriff des Anspruchs 1.The invention relates to a three-knife trimmer according to the preamble of claim 1.

Ein Dreischneider ist eine im Buchbindergewerbe eingesetzte Schneidvorrichtung, die drei Schneidmesser, nämlich ein Vordermesser und zwei Seitenmesser umfaßt. Einem solchen Dreischneider werden über eine Zuführstation Bücher zugeführt, die bereits am Rücken gebunden sind. Die Aufgabe des Dreischneiders besteht darin, die Bücher an den Seiten und an der Vorderkante in einem Arbeitsgang auf das endgültige gewünschte Format zu schneiden.A triple cutter is one used in the bookbinding industry Cutting device, the three cutting knives, namely includes a front knife and two side knives. One Such three-knife trimmers are used to feed books fed that are already tied to the back. The The job of the trimmer is to read the books the sides and on the front edge in one operation cut to the final desired format.

Der Antrieb eines derartigen Dreischneiders umfaßt einen mit konstanter Drehzahl permanent laufenden rotorischen Elektromotor, z. B. einen Drehstrommotor oder Gleichstrommotor mit einer Schwungscheibe, eine gemeinsame Antriebswelle, die mit dem Elektromotor über eine steuerbare Kupplung oder Kupplungs-Brems-Kombination verbindbar ist, sowie mehrere gleichförmig oder ungleichförmig übersetzende Getriebe, die alle mit der gemeinsamen Antriebswelle mechanisch gekoppelt sind.The drive of such a three-cutter includes one with constant speed, continuously running rotor Electric motor, e.g. B. a three-phase motor or DC motor with a flywheel, a common drive shaft, that with the electric motor via a controllable Clutch or clutch-brake combination can be connected is, as well as several uniformly or non-uniformly translating Gearboxes, all with the common drive shaft are mechanically coupled.

Die Kopplung der Bewegungsabläufe und die Bewegungsgeschwindigkeit der bewegbaren Teile in den einzelnen Stationen ist durch die konstruktive Ausführung des Antriebs festgelegt und nicht veränderbar. Dadurch läuft der Dreischneider lediglich bei maximaler Einsatzhöhe wirtschaftlich, mit geringer werdender Einsatzhöhe nimmt die Wirtschaftlichkeit ab. Außerdem beanspruchen die Koppelelemente einen erheblichen Platz innerhalb des Maschinenkörpers des Dreischneiders und ihre jeweilige Anordnung ist konstruktiv durch die Lage der zu bewegenden Teile in den einzelnen Stationen vorgegeben. Dadurch lassen sich andere Teile, wie z. B. Absaug- und Abfuhrvorrichtungen für Schneidabfälle nicht optimal ausgestalten.The coupling of the movements and the speed of movement of the moving parts in the individual stations is due to the design of the drive fixed and not changeable. This makes the three-knife trimmer run only economically at maximum operating height, the economy increases as the amount of use decreases from. In addition, the coupling elements claim a significant space within the machine body of the three-knife trimmer and their respective arrangement is constructive due to the position of the parts to be moved given to the individual stations. This allows other parts, such as B. suction and discharge devices not optimally designed for cutting waste.

Bei weit voneinander entfernt liegenden Aggregaten besteht zudem das Problem, daß durch Torsions- und/oder Biegeschwingungen des Antriebs ein aufeinander abgestimmter Bewegungsablauf der zu bewegenden Teile in den einzelnen Stationen durch die passive, schlecht gedämpfte Elastizität verfälscht wird. Um diese Störung gering zu halten ist eine besondere Präzision und eine steife Dimensionierung der Koppelelemente und Lager erforderlich, was zu einem großen Herstellungs- und Materialaufwand führt.In the case of aggregates located far apart, there is also the problem that torsion and / or Bending vibrations of the drive are coordinated Movement sequence of the parts to be moved in the individual Stations through the passive, poorly damped Elasticity is falsified. To minimize this interference holding is a special precision and a rigid dimensioning the coupling elements and bearings required resulting in a large manufacturing and material expense leads.

Der Erfindung liegt die Aufgabe zugrunde, bei einem Dreischneider eine präzise, variable Kopplung der zu bewegenden Teile zu ermöglichen, um die Voraussetzungen für einen wirtschaftlichen Betrieb auch bei variablen Einsatzhöhen zu schaffen und den mechanischen Aufwand und Platzbedarf für die Koppelelemente zugunsten einer optimalen Anordnungsmöglichkeit von Absaug- und Abfuhrvorrichtungen für Schneidabfälle zu reduzieren.The invention has for its object in a three-knife a precise, variable coupling of those to be moved Allow parts to meet the requirements for economical operation even with variable heights to create and the mechanical effort and Space required for the coupling elements in favor of an optimal one Possibility of arranging suction and discharge devices to reduce cutting waste.

Diese Aufgabe wird bei einem Dreischneider nach dem Oberbegriff des Anspruchs 1 durch die im Kennzeichen angegebenen Merkmale gelöst.With a three-knife trimmer, this task is based on the generic term of claim 1 by the specified in the license plate Features resolved.

Durch das Vorsehen gesonderter Antriebe mit digital gesteuerten Servo- oder Schrittmotoren lassen sich die Motoren jeweils unmittelbar an den zu bewegenden Teilen anordnen. Koppelelemente, die bisher erforderlich waren, um die zu bewegenden Teile mit der einzigen Antriebswelle zu koppeln, entfallen dadurch. Durch den Wegfall der Koppelelemente lassen sich Absaug- und Abfuhrvorrichtungen für Schneidabfälle besser am Enstehungsort der Schneidabfälle anordnen und für eine wirkungsvolle Abfuhr ausgestalten. Die Bewegungsabläufe und die Bewegungsgeschwindigkeit der zu bewegenden Teile kann durch den Steuerrechner variabel gesteuert werden um eine wirtschaftliche Arbeitsweise unter allen Betriebsbedingungen zu sichern. Ferner ist zwischen den zu bewegenden Teilen eine exakte Synchronisation möglich, so daß die Bewegungsabläufe optimal aufeinander abgestimmt werden können.By providing separate drives with digitally controlled The motors can be servo or stepper motors arrange each directly on the parts to be moved. Coupling elements that were previously required to the parts to be moved with the single drive shaft couple, are not necessary. By eliminating the coupling elements can suction and discharge devices for Cutting waste better at the place where the cutting waste is created arrange and design for effective removal. The movements and the speed of movement parts to be moved can be varied by the control computer be controlled around an economical way of working to secure all operating conditions. Furthermore, between an exact synchronization of the parts to be moved possible, so that the movements optimally on each other can be coordinated.

Werden gemäß einer Weiterbildung auch der Preßstempel sowie gegebenenfalls zusätzlich auch die Zuführstation, die Übergabestation und die Ausleger mit gesonderten Antrieben ausgestattet, so besteht die Möglichkeit, auch die Führung und Kraftbeaufschlagung des Preßstempels zu optimieren und im übrigen die Leistung der Servo- oder Schrittmotoren individuell auf den Leistungs- und Kraftbedarf der betreffenden zu bewegenden Teile anzupassen. Dadurch ist eine wirtschaftliche Herstellung und ein wirtschaftlicher Betrieb möglich.According to a training, the ram as well optionally also the feed station, the Transfer station and the boom with separate drives equipped, so there is also the possibility To optimize guidance and application of force to the press ram and otherwise the performance of the servo or Stepper motors individually to the power and power requirements to adapt the relevant parts to be moved. This is an economical manufacture and a economical operation possible.

Die Antriebe können rotorische Servo- oder Schrittmotoren mit nachgeschalteten gleichförmig oder ungleichförmig übersetzenden Getrieben umfassen. Durch diese Kombination, verbunden mit der Möglichkeit einer bidirektionalen Ansteuerung, ergibt sich eine wesentliche Vereinfachung bei der Gestaltung des Antriebssystems eines Dreischneiders.The drives can be rotary servo or stepper motors with downstream uniform or non-uniform include gearboxes. Through this combination, combined with the possibility of a bidirectional Control, there is a significant simplification when designing the drive system of a three-cutter.

Sind die rotorischen Servo- oder Schrittmotoren bidirektional steuerbar, so kann statt eines konstanten Hubes der Pendelbewegungen der zu bewegenden Teile auch ein variabler Hub eingestellt werden.Are the rotor servo or stepper motors bidirectional controllable, so instead of a constant stroke the pendulum movements of the parts to be moved are also variable Stroke can be set.

Eine Alternative sieht vor, daß die Antriebe lineare Servo- oder Schrittmotoren umfassen. Bei dieser Ausführung kann der Antrieb der linear zu bewegenden beweglichen Teile unmittelbar erfolgen, so daß ein Getriebe zur Umsetzung einer Drehbewegung in eine Linearbewegung entfallen kann.An alternative provides that the drives are linear Servo or stepper motors include. In this version can the drive of the linearly moving movable Parts take place immediately, so that a gear for There is no need to convert a rotary movement into a linear movement can.

Bei einer bevorzugten Ausgestaltung ist der obere Totpunkt des Vordermessers und der zwei Seitenmesser durch den Steuerrechner in Abhängigkeit der Einsatzhöhe des Schneidgutes so steuerbar, daß der Leerhub reduziert wird.In a preferred embodiment, top dead center of the front knife and the two side knives the control computer depending on the amount of use of the Cuttings can be controlled so that the idle stroke is reduced becomes.

Durch diese Maßnahme kann der bei bisher üblichen Dreischneidern bestehende Leerweg, der sich dort aufgrund des stets konstanten Hubes der Schneidmesser bei unter dem Maximum liegenden Einsatzhöhen ergibt, auf das technisch nötige Minimum beschränkt werden. Dadurch werden mit abnehmender Einsatzhöhe die Taktzeiten verringert und die Schneidleistung erhöht.This measure can be used in conventional three-knife trimmers existing empty path, which is due to the always constant stroke of the cutting knife at under the Maximum operating heights result, technically the minimum necessary. Doing so will decrease Deployment height reduces the cycle times and the Cutting performance increased.

Eine weitere Maßnahme zur Verringerung der Taktzeiten und Verbesserung der Schneidleistung besteht darin, die Startzeit der Arbeitsbewegungen des Preßstempels, des Vordermessers und der Seitenmesser durch den Steuerrechner in Abhängigkeit der jeweils vorangehenden Arbeitsbewegungen so zu steuern, daß die Pausen zwischen aufeinanderfolgenden Arbeitsbewegungen reduziert werden.Another measure to reduce cycle times and Improving the cutting performance is that Start time of the work movements of the press ram, the Front knife and the side knife by the control computer depending on the previous work movements to control so that the breaks between successive Work movements are reduced.

Bei einer besonders wirksamen Verbesserung werden das Vordermesser und die Seitenmesser durch den Steuerrechner beim Schneidvorgang von der ersten bis zur letzten Blattlage mit optimaler Schneidgeschwindigkeit und während der Leerbewegungen mit gegenüber der Schneidgeschwindigkeit erhöhter Verfahrgeschwindigkeit geführt. Neben einer ebenfalls hierdurch eintretenden Verbesserung der Schneidleistung wird dabei auch die Schnittqualität verbessert. Bei bisherigen Dreischneidern mit konventionellem Kurbelantrieb ergab sich nämlich bei Blattstapeln von etwa halber Höhe der maximalen Einsatzhöhe eine zu hohe Anschnittgeschwindigkeit und bei allen Variationen von Blattstapeln eine zu niedrige Endgeschwindigkeit wegen des unteren Umkehrpunktes. Letztere wirkte sich auf die Schnittqualität der unteren Blattlagen aus. Durch die erfindungsgemäße Weiterbildung gelingt es nun, alle Lagen eines Blattstapels in gleichbleibender Schnittqualität zu schneiden.With a particularly effective improvement that will be Front knife and the side knife by the control computer during the cutting process from the first to the last sheet layer with optimal cutting speed and during the Empty movements with compared to the cutting speed increased travel speed. In addition to one also resulting improvement in Cutting performance is also improved cut quality. With previous three-knife trimmers with conventional Crank drive resulted from sheet stacks of about half the maximum bet height is too high Gate speed and in all variations of Sheet stacking too slow due to top speed of the lower reversal point. The latter affected the Cut quality of the lower leaf layers. By the invention Continuing education now succeeds in all locations a sheet stack in constant cut quality to cut.

Zweckmäßig wird der Preßstempel durch den Steuerrechner während des gesamten Schneidvorgangs mit konstanter Kraft beaufschlagt. Auch dieses Merkmal führt gegenüber einem konventionellem Dreischneider zu einer verbesserten Schnittqualität. Bisher wurde nämlich die Pressung über einen Kurbelantrieb mit Ausgleichsfeder erzeugt, was aber in der Anfangs- und Endphase des Schneidvorganges nur eine geringere Pressung ermöglichte, so daß beim Anschneiden eines Blattstapels Blätter verrutschen konnten. Durch die erfindungsgemäße Weiterbildung wird diese Qualitätsschwäche nun wirksam beseitigt.The press ram is expediently used by the control computer with constant force throughout the cutting process acted upon. This characteristic also leads to one conventional three-knife trimmer to an improved one Cut quality. So far, the pressing has been over generates a crank drive with a balance spring, but what in the beginning and end phase of the cutting process only a lower pressure allowed, so that when cutting of a stack of sheets could slip. Due to the further development according to the invention, this quality weakness becomes now effectively eliminated.

Vorzugsweise ist die Maximalleistung der Servo- oder Schrittmotore für die Messer gerade so groß bemessen, daß die Summe aus maximaler motorische Antriebskraft und der beim Schneidvorgang auftretenden Massenträgheitskraft der Messer einschließlich der mit ihnen bewegten Teile gerade größer als die maximal auftretenden Kraftspitzen beim Schneidvorgang sind.The maximum power is preferably the servo or Measure the stepper motors for the knives just large enough that the sum of the maximum motor driving force and the inertia occurring during the cutting process Knives including the parts moving with them straight greater than the maximum force peaks that occur when Cutting process.

Durch die Einbeziehung der Massenträgheitskraft ergibt sich ein geringerer Leistungsbedarf für die Servomotoren als an sich durch die Kraftspitzen beim Schneidvorgang erforderlich wäre. Diese Bemessungsvorschrift ermöglicht eine wirtschaftliche Optimierung bei der Auswahl der einzusetzenden Servo- oder Schrittmotoren.Including the inertia lower power requirements for the servo motors than per se through the force peaks during the cutting process would be required. This design specification enables an economic optimization in the selection of the ones to be used Servo or stepper motors.

Bei einer praktischen Ausgestaltung umfaßt die Absaugvorrichtung für Schneidabfälle ein unterhalb eines Schneidtisches der Schneidstation angeordnetes Schnitzelwerk .In a practical embodiment, the suction device comprises for cutting waste one below a cutting table the cutting station arranged at the cutting station.

Bei bisherigen Dreischneidern war es wegen des durch die erforderlichen Getriebe eingeschränkten Platzes lediglich möglich, Absaugkanäle für Schneidabfälle unterhalb des Schneidtisches anzuordnen. Besonders bei großen, zusammenhängenden Schneidabfällen kann es in diesen oder den weiterführenden Absaugkanälen zu Verstopfungen kommen. Der durch den Einsatz gesonderter Antriebe gewonnene Platz ermöglicht es, bei dem erfindungsgemäßen Dreischneider die Absaugvorrichtung zu optimieren und mit einem Schnitzelwerk auszustatten. Dadurch wird das Ansaugen und der Weitertransport der Schneidabfälle ohne Verstopfungsgefahr wesentlich verbessert. With previous three-knife trimmers it was because of the required gearbox limited space only possible, suction channels for cutting waste below the Arrange cutting table. Especially with large, coherent Cutting waste can be found in this or that further suction ducts come to blockages. The one obtained by using separate drives Space makes it possible in the three-knife trimmer according to the invention to optimize the suction device and with one Equip wood chips. This will cause suction and the further transport of the cutting waste without Risk of constipation significantly improved.

Nachfolgend wird die Erfindung anhand eines Ausführungsbeispiels erläutert, das in der Zeichnung dargestellt ist.The invention is described below using an exemplary embodiment explained that shown in the drawing is.

In der Zeichnung zeigen:

Fig. 1
eine schematische Darstellung der einzelnen Stationen eines Dreischneiders und
Fig. 2
eine schematische Seitenansicht der Stationen des Dreischneiders.
The drawing shows:
Fig. 1
a schematic representation of the individual stations of a three-cutter and
Fig. 2
a schematic side view of the stations of the three-cutter.

Die in Fig. 1 und 2 gezeigte schematische Darstellung der einzelnen Stationen eines Dreischneiders zeigt eine Zuführstation 10, eine Übergabestation 12, eine Schneidstation 14 und ein Auslageband 16.The schematic representation of the in Fig. 1 and 2 A feed station shows individual stations of a three-cutter 10, a transfer station 12, a cutting station 14 and a delivery belt 16.

Gebundene Bücher gelangen von der Zuführstation 10 in ein Magazin 18. Dort werden die Bücher in der Übergabestation 12 einzeln unten aus dem Magazin 18 durch auf einer umlaufenden Förderkette 20 angebrachte Mitnehmer 22 entnommen und in Richtung der Schneidstation 14 verschoben. Vor Erreichen der Schneidposition werden die Bücher durch eine pendelnde Positioniereinrichtung 24 erfaßt und in die Schneidposition auf einem Schneidtisch 26 überführt, während die Mitnehmer 22 der Förderkette 20 nach unten wegtauchen.Bound books enter the feed station 10 Magazine 18. There the books are in the transfer station 12 individually below from the magazine 18 through on a revolving Conveyor chain 20 attached driver 22 removed and moved towards the cutting station 14. In front The books are reached by the cutting position a pendulum positioning device 24 is detected and in transferred the cutting position to a cutting table 26, while the carriers 22 of the conveyor chain 20 down dive away.

Nach dem Schneidvorgang werden die auf das endgültige Format beschnittenen Bücher durch Ausleger erfaßt und auf das Auslageband 16 transportiert.After the cutting process, the final Format cropped books captured by outrigger and on the delivery belt 16 transported.

Die Schneidstation 14 umfaßt einen Schneidtisch 26 mit einer Schneidplatte 28 und Schneidleisten 30 sowie drei Messer, nämlich zwei Seitenmesser 32, 34 und ein Vordermesser 36. Die Seitenmesser 32, 34 und das Vordermesser 36 befinden sich jeweils in einem Messerhalter wobei die Seitenmesserhalter ihrerseits auf einem Seitenmesserbalken befestigt und geführt sind. Ferner ist eine hier nicht dargestellte Fixiervorrichtung Bestandteil der Schneidstation 14, die dazu dient, den Buchstapel während des Schneidvorganges auf der Schneidplatte 28 zu fixieren, damit der Stapel als Ganzes oder einzelne Seiten nicht verrutschen. Unterhalb der Schneidplatte 28 befindet sich eine hier ebenfalls nicht dargestellte strömungsoptimierte Absaugvorrichtung für Schneidabfälle mit einem Schnitzelwerk.The cutting station 14 also includes a cutting table 26 a cutting plate 28 and cutting strips 30 and three Knives, namely two side knives 32, 34 and a front knife 36. The side knives 32, 34 and the front knife 36 are each in a knife holder, the Side knife holder in turn on a side knife bar attached and guided. There is also one here Fixing device, not shown, part of the Cutting station 14, which is used during the book stack to fix the cutting process on the cutting plate 28, so that the stack as a whole or individual pages don't slip. Located below the cutting plate 28 flow-optimized, also not shown here Suction device for cutting waste with a shredder.

Die zwei Seitenmesser 32, 34 einerseits und das Vordermessers 36 andererseits werden durch gesonderte Antriebe bewegt, die digital bidirektional gesteuerte Servomotoren 38; 40 mit nachgeschalteten ungleichförmig übersetzenden Getrieben 42; 44 umfassen. Ebenso werden die Förderkette 20 und die pendelnde Positioniereinrichtung 24 durch gesonderte Antriebe mit digital gesteuerten Servomotoren 46; 48 bewegt. Der Antrieb der Förderkette umfaßt ferner ein gleichförmig übersetzendes Getriebe 50, während der Antrieb der Positioniereinrichtung ein ungleichförmig übersetzendes Getriebe 52 umfaßt. Die Bewegungsabläufe der Servomotoren 38, 40, 46, 48 werden durch einen gemeinsamen Steuerrechner taktgenau gesteuert und synchronisiert.The two side knives 32, 34 on the one hand and the front knife 36 on the other hand by separate drives moves, the digital bidirectionally controlled servo motors 38; 40 with downstream non-uniformly translating Gear 42; 44 include. Likewise, the conveyor chain 20 and the oscillating positioning device 24 by separate Drives with digitally controlled servo motors 46; 48 moves. The drive of the conveyor chain also includes a uniformly translating gear 50, during the Drive of the positioning device is non-uniform translating gear 52 includes. The movements of the servomotors 38, 40, 46, 48 are replaced by a common one Control computer controlled and synchronized precisely.

Claims (12)

  1. A three-knife trimmer, consisting of a feed station (10), a transfer station (12), a trimming station (14) with a clamp, a fore edge knife (36), two side knives (32, 34) and a delivery means, the movement cycles of which are coupled together, together with an extraction device for trimming waste, characterised in that at least the two side knives (32, 34) on the one hand and the fore edge knife (36) on the other comprise separate drives with digitally controlled servo- or stepping motors (38, 40), the movement cycles of which are synchronised by a common control computer.
  2. A three-knife trimmer according to claim 1, characterised in that the clamp also comprises a separate drive with a digitally controlled servo- or stepping motor, the movement cycle of which is likewise synchronised by the common control computer.
  3. A three-knife trimmer according to claim 1 or claim 2, characterised in that the feed station (10), the transfer station (12) and the delivery means also comprise separate drives with digitally controlled servo- or stepping motors (46, 48), the movement cycles of which are likewise synchronised by the common control computer.
  4. A three-knife trimmer according to one of claims 1 to 3, characterised in that the drives comprise rotary servo- or stepping motors (38, 40, 46, 48) with evenly or unevenly multiplying gears (42, 44, 50, 52) connected downstream.
  5. A three-knife trimmer according to claim 4, characterised in that the rotary servo- or stepping motors (42, 44) are bidirectionally controllable.
  6. A three-knife trimmer according to one of claims 1 to 3, characterised in that the drives comprise linear servo- or stepping motors.
  7. A three-knife trimmer according to one of claims 1 to 6, characterised in that the top dead centre of the fore edge knife (36), the two side knives (32, 34) and the clamp may be controlled by the control computer as a function of the insertion height of the material to be trimmed in such a way that the return stroke is reduced.
  8. A three-knife trimmer according to one of claims 1 to 7, characterised in that the starting time of the working movements of the clamp, the fore edge knife (36) and the side knives (32, 34) may be controlled by the control computer as a function of the respectively preceding working movements in such a way that the intervals between successive working movements are reduced.
  9. A three-knife trimmer according to one of claims 1 to 8, characterised in that the fore edge knife (36) and the side knives (32, 34) are maintained by the control computer at optimum trimming speed from the first to the last ply during the trimming process and at a displacement speed which is higher than the trimming speed during the return movements.
  10. A three side trimmer according to one of claims 1 to 9, characterised in that the clamp is loaded with a constant force by the control computer during the entire trimming process.
  11. A three-knife trimmer according to one of claims 1 to 10, characterised in that the maximum power of the servo- or stepping motors (38, 40) is precisely proportioned such that the sum of the maximum motive drive force and the mass inertia force of the knives (32, 34, 36), including the parts moved therewith, arising during the trimming process is just greater than the maximum peak forces arising during the trimming process.
  12. A three-knife trimmer according to one of claims 1 to 11, characterised in that the extraction device for trimming waste is flow-optimised and in that an associated shredding mechanism is arranged beneath a trimming table (26) of the trimming station (14).
EP96106902A 1995-05-04 1996-05-02 Three side cutter Expired - Lifetime EP0740983B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19516047A DE19516047C2 (en) 1995-05-04 1995-05-04 Triple cutter
DE19516047 1995-05-04

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EP0740983A1 EP0740983A1 (en) 1996-11-06
EP0740983B1 true EP0740983B1 (en) 2001-06-06

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Also Published As

Publication number Publication date
DE19516047C2 (en) 1997-04-30
EP0740983A1 (en) 1996-11-06
DE59607028D1 (en) 2001-07-12
DE19516047A1 (en) 1996-11-07

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