EP0502355A1 - Stripping assembly for the cutting rollers of a document shredder - Google Patents

Stripping assembly for the cutting rollers of a document shredder Download PDF

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Publication number
EP0502355A1
EP0502355A1 EP92102655A EP92102655A EP0502355A1 EP 0502355 A1 EP0502355 A1 EP 0502355A1 EP 92102655 A EP92102655 A EP 92102655A EP 92102655 A EP92102655 A EP 92102655A EP 0502355 A1 EP0502355 A1 EP 0502355A1
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EP
European Patent Office
Prior art keywords
stripping
webs
housing part
receptacle
block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92102655A
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German (de)
French (fr)
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EP0502355B1 (en
Inventor
Willi Strohmeyer
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Geha Werke GmbH
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Geha Werke GmbH
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Publication of EP0502355A1 publication Critical patent/EP0502355A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C18/00—Disintegrating by knives or other cutting or tearing members which chop material into fragments
    • B02C18/0007—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents
    • B02C2018/0069—Disintegrating by knives or other cutting or tearing members which chop material into fragments specially adapted for disintegrating documents with stripping devices

Definitions

  • the invention relates to a knife shaft stripping device for document shredders, whose one-piece stripping webs are arranged in the cutting unit in the cutting zone between the knives of the knife shafts.
  • the stripping webs of such knife shaft stripping devices prevent in the cutting unit that the comminuted material penetrates into the spaces between the knives of the knife shafts and can settle there. Fixing the shredded material between the knives of the knife shafts would lead to malfunctions.
  • the invention has for its object to simplify the structure of a document shredder and to reduce the number of items and the required assembly and adjustment.
  • the invention has the characterizing features of claim 1.
  • the fact that the stripping webs are produced as a stripping block which can be fastened in a receptacle of a housing part of the document shredder results in a simplified construction of the device. The cost of manufacturing the individual parts can be reduced.
  • the arrangement of the scraper block with the scraper bars obtains the required stability by assigning support bars to the scraper bars, which are arranged on the opposite housing part.
  • the scraper webs and the support webs are provided with support surfaces which lie one on top of the other in the assembled state of the cutting mechanism, such that the scraper webs are supported and the scraper block is fixed in its position.
  • the receptacle for the stripping block is trough-shaped and the stripping block is arranged in the receptacle with play ensures that certain manufacturing tolerances of the knife shafts can be compensated for automatically.
  • the wiper block positions itself automatically when the cutting unit is installed, depending on the position of the knives of the knife shafts.
  • the stripping block as a molded part, in particular as a plastic molded part. Wipers molded from plastic also have the required stability due to the design described.
  • the support webs are injection-molded in one piece with a plastic housing part.
  • a further simplification of the structure of the cutting mechanism can be achieved.
  • the receptacle for the stripping block is preferably arranged on the lower housing part of the document shredder, while the support webs are arranged on the upper housing part.
  • the support surfaces of the scraper webs and the support webs are then above the cutting zone of the cutting unit in the area of the paper feed, so that any edges in the area of the support surfaces can in no way negatively influence the function of the scraper webs. This preferred solution reliably rules out a jam of shredded paper particles in the cutting unit.
  • bearing surfaces for the knife shafts are also injected into the lower housing part or into the upper housing part, the structure and in particular also the assembly of the cutting mechanism can be further simplified considerably. This also applies in particular if the receptacle for a drive motor and bearing surfaces for a transmission are also injected. All the essential components of the cutting unit are then correctly positioned in relation to one another, without an adjustment having to be made. As already stated, manufacturing tolerances of the knife shaft can, if necessary, be compensated for by arranging the stripping block with the stripping bars in its receptacle with play.
  • 1 denotes a cutting device of a document shredder.
  • the cutting unit 1 has two knife shafts 2, on which, in a manner known per se, intermeshing knives 3 are arranged for comminuting the documents not shown in the drawing.
  • a knife shaft stripping device consisting of two rows of stripping bars 4 and associated supporting bars 5 is arranged.
  • the stripping webs 4 are combined to form a stripping block 6.
  • the stripping webs 4 engage in the spaces between the knives 3 of the knife shafts 2 and fill them. This prevents shredded documents from entering these gaps.
  • the stripping webs 4 are comb-shaped and molded in one piece from plastic to form a stripping block 6.
  • a trough-shaped receptacle 8 is arranged on the lower housing part 7 for the stripping block 6.
  • the stripping block 6 is held in the receptacle 8 in the assembled state of the cutting unit 1.
  • the stripping block 6 is preferably arranged with play in this receptacle 8, so that manufacturing tolerances of the knife shaft 2 are then automatically compensated for.
  • the support webs 5 have on their upper end face support surfaces 9 which are arranged at an angle to one another.
  • Corresponding support surfaces 10 are arranged on the end faces of the scraper webs 4. In the assembled state of the cutting unit 1, d. H. When the upper housing part 11 is placed on the lower housing part 7, the supporting surfaces 9 and 10 lie one on top of the other.
  • the support surfaces 10 of the support webs 5 engage in the support surfaces 9 of the wiper webs in such a way that the wiper webs 4 are supported both laterally and in the vertical direction.
  • both a lateral displacement of the stripping webs 4 by the paper passing through, and a displacement in the direction of the paper flow perpendicular to the longitudinal axes of the knife shafts 2 are reliably prevented.
  • the stability of the cutting mechanism 1 is further increased by reinforcing ribs 12 arranged on the receptacle 8.
  • the interlocking of the stripping webs 4 and the supporting webs 5 also increases the overall stability of the document shredder housing consisting of the lower housing part 7 and the upper housing part 11 in an advantageous manner.
  • a paper inlet shaft 13 is arranged in the upper housing part 11 for feeding the paper to be shredded.
  • bearing surfaces 14 for the knife shafts 2 are arranged in the lower housing part 7 and in the upper housing part 11. These bearing surfaces 14, like the receptacle 8 for the stripping block 6 and the supporting webs 5, are injected into the lower housing part 7 or into the upper housing part 11.
  • bearing surfaces 17 for a gear 18 are also injected into the upper housing part 11 and the lower housing part 7.
  • the drive motor 16 drives the knife shafts 2 of the cutting mechanism 1 via the gear 18.
  • the paper For shredding, the paper, not shown in the drawing, is inserted into the paper inlet shaft 13 and then reaches the knives 3 of the knife shafts 2. The overlapping knives 3 shred the paper, the stripping webs 4 preventing the paper from entering the spaces between the knives 3 occurs. The shredded paper then passes through a paper channel 19 formed between the stripping bars 4 and supporting bars 5 arranged on both sides into a collecting container, not shown in the drawing.
  • the stripping webs 4 are supported by the supporting webs 5, despite their preferred design as a flexible plastic part per se, they are exactly fixed in their position. As has surprisingly been shown, it is ensured on the basis of the design according to the invention that the stripping webs 4 remain in their position during the comminution process. Even under the action of the forces exerted by the paper to be shredded, there is no such deformation of the scraper webs 4 molded from plastic that malfunctions could occur.
  • the design of the stripping webs 4 and the supporting webs 5 as a plastic injection-molded part gives the advantage of very inexpensive manufacture.
  • the individual parts of the document shredder are very easy to assemble in the inventive design.
  • the upper housing part with the support webs 5 and the corresponding bearing surfaces is placed.
  • the stripping block 6 is aligned and fixed automatically on the support surfaces 10 of the support webs 5 and on the knife shafts.

Abstract

A stripping assembly for cutting rollers is described, in which the stripping webs (4) are produced as a stripping block (6) which is attached in a receptacle (8) of a housing component of the document shredder. Here, the stripping webs (4) are assigned support webs (5) which are arranged on the housing component lying opposite in each case. The stripping webs (4) and the support webs (5) are provided with support faces (9, 10) which in the mounted state of the cutting mechanism (1) are arranged one on top of the other in such a way that the stripping webs (4) are supported. The invention is characterised by a very easy-to-assemble design and low costs for the individual components. <IMAGE>

Description

Die Erfindung betrifft eine Messerwellen-Abstreifvorrichtung für Schriftgutvernichter, deren einteilig ausgebildete Abstreifstege im Schneidwerk in der Schneidzone zwischen den Messern der Messerwellen angeordnet sind.The invention relates to a knife shaft stripping device for document shredders, whose one-piece stripping webs are arranged in the cutting unit in the cutting zone between the knives of the knife shafts.

Die Abstreifstege derartiger Messerwellen-Abstreifvorrichtungen verhindern im Schneidwerk, daß das zerkleinerte Gut in die Zwischenräume zwischen den Messern der Messerwellen eindringt und sich dort festsetzen kann. Ein Festsetzen des zerkleinerten Gutes zwischen den Messern der Messerwellen würde zu Betriebsstörungen führen.The stripping webs of such knife shaft stripping devices prevent in the cutting unit that the comminuted material penetrates into the spaces between the knives of the knife shafts and can settle there. Fixing the shredded material between the knives of the knife shafts would lead to malfunctions.

Durch die DE-OS 36 16 554 ist es bereits bekanntgeworden, in einem Schneidwerk beidseitig der Messerwelle jeweils einteilig ausgebildete Abstreifstege in Form von Abstreifgittern anzuordnen. Die Abstreifgitter sind in den Seitenteilen des Schneidwerkes, in denen auch die Lager der Messerwellen angeordnet sind, befestigt.From DE-OS 36 16 554 it has already become known to arrange in one cutter on both sides of the knife shaft each one-piece stripping webs in the form of stripping grids. The scraper grids are fastened in the side parts of the cutting unit, in which the bearings of the knife shafts are also arranged.

Der Erfindung liegt die Aufgabe zugrunde, den Aufbau eines Schriftgutvernichters zu vereinfachen und die Anzahl der Einzelteile sowie den erforderlichen Montage- und Justageaufwand zu verringern.The invention has for its object to simplify the structure of a document shredder and to reduce the number of items and the required assembly and adjustment.

Zur Lösung dieser Aufgabe weist die Erfindung die kennzeichnenden Merkmale des Anspruchs 1 auf. Dadurch, daß die Abstreifstege als ein Abstreifblock hergestellt sind, der in einer Aufnahme eines Gehäuseteiles des Schriftgutvernichters befestigbar ist, wird ein vereinfachter Aufbau des Gerätes erreicht. Dabei können die Kosten für die Herstellung der Einzelteile reduziert werden. Die Anordnung des Abstreifblockes mit den Abstreifstegen erhält die erforderliche Stabilität, indem den Abstreifstegen Stützstege zugeordnet sind, die an dem jeweils gegenüberliegenden Gehäuseteil angeordnet sind. Die Abstreifstege und die Stützstege sind mit Stützflächen versehen, die im montierten Zustand des Schneidwerkes aufeinanderliegen, derart, daß die Abstreifstege abgestützt sind und der Abstreifblock in seiner Lage fixiert ist.To achieve this object, the invention has the characterizing features of claim 1. The fact that the stripping webs are produced as a stripping block which can be fastened in a receptacle of a housing part of the document shredder results in a simplified construction of the device. The cost of manufacturing the individual parts can be reduced. The arrangement of the scraper block with the scraper bars obtains the required stability by assigning support bars to the scraper bars, which are arranged on the opposite housing part. The scraper webs and the support webs are provided with support surfaces which lie one on top of the other in the assembled state of the cutting mechanism, such that the scraper webs are supported and the scraper block is fixed in its position.

Dadurch, daß die Aufnahme für den Abstreifblock wannenförmig ausgebildet und der Abstreifblock in der Aufnahme mit Spiel angeordnet ist, wird erreicht, daß gewisse Fertigungstoleranzen der Messerwellen selbsttätig ausgeglichen werden können. Der Abstreifblock positioniert sich bei der Montage des Schneidwerkes selbsttätig entsprechend der Lage der Messer der Messerwellen.The fact that the receptacle for the stripping block is trough-shaped and the stripping block is arranged in the receptacle with play ensures that certain manufacturing tolerances of the knife shafts can be compensated for automatically. The wiper block positions itself automatically when the cutting unit is installed, depending on the position of the knives of the knife shafts.

Insbesondere, sofern die Stützflächen der Abstreifstege und der Stützstege winkelig zueinander angeordnet sind, kommt es insbesondere in der Richtung zu den Messerwellen zu einem Verkeilen der Stege, so daß die fertig montierte Einheit eine hohe Stabilität erhält. Gemäß einer bevorzugten Ausführungsform der Erfindung ist es auch möglich, den Abstreifblock als Spritzteil, insbesondere als Kunststoffspritzteil, auszubilden. Auch aus Kunststoff gespritzte Abstreifstege weisen aufgrund der beschriebenen Gestaltung die erforderliche Stabilität auf.In particular, if the support surfaces of the scraper webs and the support webs are arranged at an angle to one another, the webs wedge in particular in the direction of the knife shafts, so that the completely assembled unit is highly stable. According to a preferred embodiment of the invention, it is also possible to design the stripping block as a molded part, in particular as a plastic molded part. Wipers molded from plastic also have the required stability due to the design described.

Weiterhin ist es vorgesehen, daß die Stützstege einteilig mit einem Gehäuseteil aus Kunststoff gespritzt sind. So ist eine weitere Vereinfachung des Aufbaues des Schneidwerkes erzielbar. Selbstverständlich ist es alternativ auch möglich, die Stützstege einteilig als Block aus Kunststoff zu spritzen und dann in eine Aufnahme des Gehäuses einzusetzen.Furthermore, it is provided that the support webs are injection-molded in one piece with a plastic housing part. A further simplification of the structure of the cutting mechanism can be achieved. Of course, it is alternatively also possible to inject the support webs in one piece as a block from plastic and then insert them into a receptacle in the housing.

Hier wäre zwar ein zusätzliches Spritzwerkzeug erforderlich, die Werkzeuge könnten insgesamt aber einfacher, d. h. billiger, gestaltet werden. Wesentlich ist es, daß sich genau wie bei den als Block gespritzten Abstreifstegen die Möglichkeit ergibt, die Stege an Messerwellen unterschiedlicher Abmessungen anzupassen, d. h. auszutauschen.Although an additional injection tool would be required here, the tools could be simpler overall, i. H. cheaper to be designed. It is essential that, just as with the scraper bars molded as a block, there is the possibility of adapting the bars to knife shafts of different dimensions, i. H. exchange.

Vorzugsweise ist die Aufnahme für den Abstreifblock am Gehäuseunterteil des Schriftgutvernichters angeordnet, während die Stützstege am Gehäuseoberteil angeordnet sind. Die Stützflächen der Abstreifstege und der Stützstege liegen dann oberhalb der Schneidzone des Schneidwerkes im Bereich der Papierzuführung, so daß sich etwaige Kanten im Bereich der Stützflächen die Funktion der Abstreifstege auf keinen Fall negativ beeinflussen können. Einen Stau zerkleinerter Papierteilchen im Schneidwerk schließt diese bevorzugte Lösung mit Sicherheit aus.The receptacle for the stripping block is preferably arranged on the lower housing part of the document shredder, while the support webs are arranged on the upper housing part. The support surfaces of the scraper webs and the support webs are then above the cutting zone of the cutting unit in the area of the paper feed, so that any edges in the area of the support surfaces can in no way negatively influence the function of the scraper webs. This preferred solution reliably rules out a jam of shredded paper particles in the cutting unit.

Sofern in das Gehäuseunterteil bzw. in das Gehäuseoberteil zusätzlich zu der Aufnahme für den Abstreifblock und den Stützstegen auch Lagerflächen für die Messerwellen eingespritzt sind, läßt sich der Aufbau und insbesondere auch die Montage des Schneidwerkes weiter erheblich vereinfachen. Dies gilt insbesondere auch dann, wenn zusätzlich auch noch die Aufnahme für einen Antriebsmotor und Lagerflächen für ein Getriebe eingespritzt sind. Es sind dann alle wesentlichen Bauteile des Schneidwerkes in ihrer Position zueinander richtig angeordnet, ohne daß eine Justage erfolgen muß. Wie bereits ausgeführt, lassen sich Fertigungstoleranzen der Messerwelle gegebenenfalls dadurch ausgleichen, daß der Abstreifblock mit den Abstreifstegen in seiner Aufnahme mit Spiel angeordnet ist.If, in addition to the receptacle for the stripping block and the supporting webs, bearing surfaces for the knife shafts are also injected into the lower housing part or into the upper housing part, the structure and in particular also the assembly of the cutting mechanism can be further simplified considerably. This also applies in particular if the receptacle for a drive motor and bearing surfaces for a transmission are also injected. All the essential components of the cutting unit are then correctly positioned in relation to one another, without an adjustment having to be made. As already stated, manufacturing tolerances of the knife shaft can, if necessary, be compensated for by arranging the stripping block with the stripping bars in its receptacle with play.

Ein Ausführungsbeispiel der Erfindung wird nachfolgend anhand der Zeichnungen näher erläutert. Es zeigen:

Fig. 1
einen Schriftgutvernichter mit seinen Bauteilen im geöffneten Zustand,
Fig. 2
den Abstreifblock des Schneidwerkes mit seiner Aufnahme vor der Montage,
Fig. 3
den Abstreifblock gemäß Fig. 2 im montierten Zustand mit den an seinen Abstreifstegen angreifenden Stützstegen,
Fig. 4
einen Teil des Schneidwerkes im fertig montierten Zustand.
An embodiment of the invention is explained below with reference to the drawings. Show it:
Fig. 1
a document shredder with its components in the open state,
Fig. 2
the scraper block of the cutting unit with its holder before assembly,
Fig. 3
2 in the assembled state with the supporting webs engaging on its wiping webs,
Fig. 4
part of the cutting unit in the fully assembled state.

In der Zeichnung ist mit 1 ein Schneidwerk eines Schriftgutvernichters bezeichnet. Das Schneidwerk 1 weist zwei Messerwellen 2 auf, auf denen in an sich bekannter Weise ineinandergreifende Messer 3 zur Zerkleinerung des in der Zeichnung nicht dargestellten Schriftgutes angeordnet sind. An den beiden Messerwellen 2 ist eine Messerwellen-Abstreifvorrichtung, bestehend aus zwei Reihen Abstreifstegen 4 und zugeordneten Stützstegen 5 angeordnet. Die Abstreifstege 4 sind zu einem Abstreifblock 6 zusammengefaßt. Wie aus der Fig. 4 der Zeichnung ersichtlich ist, greifen die Abstreifstege 4 in die Zwischenräume zwischen den Messern 3 der Messerwellen 2 ein und füllen diese aus. Hierdurch wird das Eintreten von zerkleinertem Schriftgut in diese Zwischenräume verhindert.In the drawing, 1 denotes a cutting device of a document shredder. The cutting unit 1 has two knife shafts 2, on which, in a manner known per se, intermeshing knives 3 are arranged for comminuting the documents not shown in the drawing. On the two knife shafts 2, a knife shaft stripping device consisting of two rows of stripping bars 4 and associated supporting bars 5 is arranged. The stripping webs 4 are combined to form a stripping block 6. As can be seen from FIG. 4 of the drawing, the stripping webs 4 engage in the spaces between the knives 3 of the knife shafts 2 and fill them. This prevents shredded documents from entering these gaps.

Die Abstreifstege 4 sind kammartig gestaltet und einteilig aus Kunststoff gespritzt zu einem Abstreifblock 6 vereinigt. Wie insbesondere aus der Fig. 4 ersichtlich, ist am Gehäuseunterteil 7 für den Abstreifblock 6 eine wannenförmig ausgebildete Aufnahme 8 angeordnet. Wie aus der Fig. 3 ersichtlich ist, wird der Abstreifblock 6 im montierten Zustand des Schneidwerkes 1 in der Aufnahme 8 gehalten. Vorzugsweise ist der Abstreifblock 6 in dieser Aufnahme 8 mit Spiel angeordnet, so daß dann Fertigungstoleranzen der Messerwelle 2 selbsttätig ausgeglichen werden.The stripping webs 4 are comb-shaped and molded in one piece from plastic to form a stripping block 6. As can be seen in particular from FIG. 4, a trough-shaped receptacle 8 is arranged on the lower housing part 7 for the stripping block 6. As can be seen from FIG. 3, the stripping block 6 is held in the receptacle 8 in the assembled state of the cutting unit 1. The stripping block 6 is preferably arranged with play in this receptacle 8, so that manufacturing tolerances of the knife shaft 2 are then automatically compensated for.

Die Stützstege 5 weisen an ihrer oberen Stirnseite Stützflächen 9 auf, die winklig zueinander angeordnet sind. Entsprechende Stützflächen 10 sind an den Stirnseiten der Abstreifstege 4 angeordnet. Im montierten Zustand des Schneidwerkes 1, d. h. bei auf das Gehäuseunterteil 7 aufgesetztem Gehäuseoberteil 11, legen sich die Stützflächen 9 und 10 aufeinander.The support webs 5 have on their upper end face support surfaces 9 which are arranged at an angle to one another. Corresponding support surfaces 10 are arranged on the end faces of the scraper webs 4. In the assembled state of the cutting unit 1, d. H. When the upper housing part 11 is placed on the lower housing part 7, the supporting surfaces 9 and 10 lie one on top of the other.

Wie beispielsweise aus der Fig. 3 der Zeichnung ersichtlich ist, greifen die Stützflächen 10 der Stützstege 5 derart in die Stützflächen 9 der Abstreifstege ein, daß die Abstreifstege 4 sowohl seitlich, als auch in vertikaler Richtung abgestützt werden. Es wird somit sowohl eine seitliche Verschiebung der Abstreifstege 4 durch das durchlaufende Papier, als auch eine Verschiebung in Richtung des Papierlaufes senkrecht zu den Längsachsen der Messerwellen 2 sicher verhindert. Die Stabilität des Schneidwerkes 1 wird weiterhin durch an der Aufnahme 8 angeordnete Verstärkungsrippen 12 erhöht. Insgesamt wird durch das Ineinandergreifen der Abstreifstege 4 und der Stützstege 5 auch die Stabilität des aus dem Gehäuseunterteil 7 und dem Gehäuseoberteil 11 bestehenden Gehäuses des Schriftgutvernichters insgesamt in vorteilhafter Weise erhöht.As can be seen, for example, from FIG. 3 of the drawing, the support surfaces 10 of the support webs 5 engage in the support surfaces 9 of the wiper webs in such a way that the wiper webs 4 are supported both laterally and in the vertical direction. Thus, both a lateral displacement of the stripping webs 4 by the paper passing through, and a displacement in the direction of the paper flow perpendicular to the longitudinal axes of the knife shafts 2 are reliably prevented. The stability of the cutting mechanism 1 is further increased by reinforcing ribs 12 arranged on the receptacle 8. Overall, the interlocking of the stripping webs 4 and the supporting webs 5 also increases the overall stability of the document shredder housing consisting of the lower housing part 7 and the upper housing part 11 in an advantageous manner.

Aus der Zeichnung ist weiterhin ersichtlich, daß im Gehäuseoberteil 11 ein Papiereinlaufschacht 13 für die Zuführung des zu zerkleinernden Papiers angeordnet ist. Im Gehäuseunterteil 7 und im Gehäuseoberteil 11 sind, wie aus der Fig. 1 ersichtlich ist, Lagerflächen 14 für die Messerwellen 2 angeordnet. Diese Lagerflächen 14 sind genau wie die Aufnahme 8 für den Abstreifblock 6 und die Stützstege 5 in das Gehäuseunterteil 7 bzw. in das Gehäuseoberteil 11 eingespritzt. Das gleiche gilt für eine Aufnahme 15 für einen Antriebsmotor 16 des Schneidwerkes 1. In das Gehäuseoberteil 11 und das Gehäuseunterteil 7 sind weiterhin Lagerflächen 17 für ein Getriebe 18 eingespritzt. Über das Getriebe 18 treibt der Antriebsmotor 16 die Messerwellen 2 des Schneidwerkes 1 an.From the drawing it can also be seen that a paper inlet shaft 13 is arranged in the upper housing part 11 for feeding the paper to be shredded. As can be seen from FIG. 1, bearing surfaces 14 for the knife shafts 2 are arranged in the lower housing part 7 and in the upper housing part 11. These bearing surfaces 14, like the receptacle 8 for the stripping block 6 and the supporting webs 5, are injected into the lower housing part 7 or into the upper housing part 11. The same applies to a receptacle 15 for a drive motor 16 of the cutting mechanism 1. Bearing surfaces 17 for a gear 18 are also injected into the upper housing part 11 and the lower housing part 7. The drive motor 16 drives the knife shafts 2 of the cutting mechanism 1 via the gear 18.

Zur Zerkleinerung wird das in der Zeichnung nicht dargestellte Papier in den Papiereinlaufschacht 13 eingeführt und gelangt dann an die Messer 3 der Messerwellen 2. Die sich überlappenden Messer 3 zerkleinern das Papier, wobei die Abstreifstege 4 verhindern, daß das Papier in die Zwischenräume zwischen den Messern 3 eintritt. Das zerkleinerte Papier gelangt dann durch einen zwischen den beidseitig angeordneten Abstreifstegen 4 und Stützstegen 5 ausgebildeten Papierkanal 19 in einen in der Zeichnung nicht dargestellten Auffangbehälter.For shredding, the paper, not shown in the drawing, is inserted into the paper inlet shaft 13 and then reaches the knives 3 of the knife shafts 2. The overlapping knives 3 shred the paper, the stripping webs 4 preventing the paper from entering the spaces between the knives 3 occurs. The shredded paper then passes through a paper channel 19 formed between the stripping bars 4 and supporting bars 5 arranged on both sides into a collecting container, not shown in the drawing.

Da die Abstreifstege 4 von den Stützstegen 5 abgestützt sind, sind diese trotz ihrer bevorzugten Ausbildung als an sich flexibles Kunststoffteil in ihrer Lage exakt fixiert. Wie es sich überraschend gezeigt hat, ist es aufgrund der erfindungsgemäßen Gestaltung sichergestellt, daß die Abstreifstege 4 beim Zerkleinerungsvorgang in ihrer Position verbleiben. Auch unter der Einwirkung der vom zu zerkleinernden Papier ausgeübten Kräfte erfolgt keine derartige Deformation der aus Kunststoff gespritzten Abstreifstege 4, daß Funktionsstörungen eintreten könnten. Aus der Ausbildung der Abstreifstege 4 und der Stützstege 5 als Kunststoffspritzteil ergibt sich der Vorteil einer sehr kostengünstigen Herstellung.Since the stripping webs 4 are supported by the supporting webs 5, despite their preferred design as a flexible plastic part per se, they are exactly fixed in their position. As has surprisingly been shown, it is ensured on the basis of the design according to the invention that the stripping webs 4 remain in their position during the comminution process. Even under the action of the forces exerted by the paper to be shredded, there is no such deformation of the scraper webs 4 molded from plastic that malfunctions could occur. The design of the stripping webs 4 and the supporting webs 5 as a plastic injection-molded part gives the advantage of very inexpensive manufacture.

Abweichend von der vorstehend beschriebenen Lösung ist es selbstverständlich möglich, die Abstreifstege 4 zu verlängern und die Stützstege 5 beispielsweise nur andeutungsweise am Gehäuseoberteil 11 vorzusehen. Wesentlich ist, daß am Gehäuseoberteil die Stützflächen 10 angeordnet sind. Weiterhin ist es selbstverständlich auch möglich, die Abstreifstege 4 am Gehäuseoberteil 11 anzuordnen. Die Stützstege 5 sind in diesem Fall am Gehäuseunterteil 7 angeordnet. Auch eine derartige Lösung ist bei entsprechender Gestaltung der Übergänge an den Stützflächen 9 und 10 voll funktionsfähig.Deviating from the solution described above, it is of course possible to extend the wiper webs 4 and to provide the support webs 5, for example, only hint at the upper housing part 11. It is essential that the support surfaces 10 are arranged on the upper housing part. Furthermore, it is of course also possible to arrange the scraper webs 4 on the upper housing part 11. The support webs 5 are arranged in this case on the lower housing part 7. Such a solution is also fully functional with a corresponding design of the transitions on the support surfaces 9 and 10.

Wie insbesondere aus der Fig. 1 ersichtlich ist, sind bei erfindungsgemäßer Gestaltung die Einzelteile des Schriftgutvernichters sehr einfach zu montieren. Gemäß der in der Fig. 1 dargestellten besonders vorteilhaften Ausführungsform der Erfindung ist es letztlich lediglich erforderlich, in das Gehäuseunterteil 7 den Abstreifblock 6 in seine Aufnahme 8, die Messerwellen 2 in ihre Lagerflächen 14, den Antriebsmotor 16 in seine Aufnahme 15 und das Getriebe 18 in seine Lagerfläche 17 einzulegen. Danach wird das Gehäuseoberteil mit den Stützstegen 5 und den entsprechenden Lagerflächen aufgesetzt. Die Ausrichtung und Fixierung des Abstreifblocks 6 erfolgt selbsttätig an den Stützflächen 10 der Stützstege 5 und an den Messerwellen.As can be seen in particular from FIG. 1, the individual parts of the document shredder are very easy to assemble in the inventive design. According to the particularly advantageous embodiment of the invention shown in FIG. 1, it is ultimately only necessary to insert the stripper block 6 into its receptacle 8, the knife shafts 2 into its bearing surfaces 14, the drive motor 16 into its receptacle 15, and the gear 18 into the lower housing part 7 insert into its bearing surface 17. Then the upper housing part with the support webs 5 and the corresponding bearing surfaces is placed. The stripping block 6 is aligned and fixed automatically on the support surfaces 10 of the support webs 5 and on the knife shafts.

Claims (11)

Messerwellen-Abstreifvorrichtung für Schriftgutvernichter, deren einteilig ausgebildete Abstreifstege (4) im Schneidwerk (  ) in der Schneidzone zwischen den Messern (3) der Messerwellen (2) angeordnet sind, dadurch gekennzeichnet, daß die Abstreifstege (4) als ein Abstreifblock (6) hergestellt sind, der in einer Aufnahme (8) eines Gehäuseteils (Gehäuseunterteil 7, Gehäuseoberteil 11) befestigbar ist, daß den Abstreifstegen (4) Stützstege (5) zugeordnet sind, die an dem jeweils gegenüberliegenden Gehäuseteil (Gehäuseunterteil 7, Gehäuseoberteil 11) angeordnet sind, und daß die Abstreifstege (4) und die Stützstege (5) mit Stützflächen (9, 10) versehen sind, die im montierten Zustand des Schneidwerkes (1) aufeinander liegen, derart, daß die Abstreifstege (4) abgestützt sind.Knife shaft stripping device for document shredders, the one-piece stripping webs (4) of which are arranged in the cutting unit () in the cutting zone between the knives (3) of the knife shafts (2), characterized in that the stripping webs (4) are produced as a stripping block (6) which can be fastened in a receptacle (8) of a housing part (lower housing part 7, upper housing part 11), that the stripping webs (4) are assigned supporting webs (5) which are arranged on the respectively opposite housing part (lower housing part 7, upper housing part 11), and that the scraper webs (4) and the support webs (5) are provided with support surfaces (9, 10) which lie one on top of the other in the assembled state of the cutting unit (1), in such a way that the scraper webs (4) are supported. Messerwellen-Abstreifvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Aufnahme (8) für den Abstreifblock (6) wannenförmig ausgebildet ist.Knife shaft stripping device according to claim 1, characterized in that the receptacle (8) for the stripping block (6) is trough-shaped. Messerwellen-Abstreifvorrichtung nach den Ansprüchen 1 und 2, dadurch gekennzeichnet, daß der Abstreifblock (6) in der Aufnahme (8) mit Spiel angeordnet ist.Knife shaft stripping device according to claims 1 and 2, characterized in that the stripping block (6) is arranged with play in the receptacle (8). Messerwellen-Abstreifvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Stützflächen (9, 10) der Abstreifstege (4) und der Stützstege (5) winklig zueinander angeordnet sind.Knife shaft stripping device according to claim 1, characterized in that the supporting surfaces (9, 10) of the stripping webs (4) and the supporting webs (5) are arranged at an angle to one another. Messerwellen-Abstreifvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß der Abstreifblock (6) als Spritzteil hergestellt ist.Knife shaft stripping device according to claim 1, characterized in that the stripping block (6) is produced as a molded part. Messerwellen-Abstreifvorrichtung nach den Ansprüchen 1 und 5, dadurch gekennzeichnet, daß der Abstreifblock (6) als Spritzteil aus Kunststoff hergestellt ist.Knife shaft stripping device according to claims 1 and 5, characterized in that the stripping block (6) is made as a molded part made of plastic. Messerwellen-Abstreifvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß Stützstege (5) einteilig mit einem Gehäuseteil (Gehäuseunterteil 7, Gehäuseoberteil 11) aus Kunststoff gespritzt sind.Knife shaft stripping device according to claim 1, characterized in that support webs (5) are injection-molded in one piece with a housing part (lower housing part 7, upper housing part 11) made of plastic. Messerwellen-Abstreifvorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Aufnahme (8) für den Abstreifblock (6) einteilig mit einem Gehäuseteil (Gehäuseunterteil 7, Gehäuseoberteil 11) aus Kunststoff gespritzt ist.Knife shaft stripping device according to claim 1, characterized in that the receptacle (8) for the stripping block (6) is injection-molded in one piece with a housing part (lower housing part 7, upper housing part 11) made of plastic. Messerwellen-Abstreifvorrichtung nach Anspruch 1 und einem oder mehreren der weiteren Ansprüche, dadurch gekennzeichnet, daß die Aufnahme (8) für den Abstreifblock (6) am Gehäuseunterteil (7) des Schriftgutvernichters angeordnet ist und daß die Stützstege (5) am Gehäuseoberteil (11) angeordnet sind.Knife shaft stripping device according to claim 1 and one or more of the further claims, characterized in that the receptacle (8) for the stripping block (6) is arranged on the lower housing part (7) of the document shredder and that the support webs (5) on the upper housing part (11) are arranged. Messerwellen-Abstreifvorrichtung nach Anspruch 1 und einem oder mehreren der weiteren Ansprüche, dadurch gekennzeichnet, daß in das Gehäuseunterteil (7) bzw. in das Gehäuseoberteil (11) des Schriftgutvernichters die Aufnahme (8) für den Abstreifblock (6), die Stützstege (5) und außerdem Lagerflächen (14) für die Messerwellen (2) eingespritzt sind.Knife shaft stripping device according to claim 1 and one or more of the further claims, characterized in that in the lower housing part (7) or in the upper housing part (11) of the document shredder the receptacle (8) for the stripping block (6), the supporting webs (5 ) and also bearing surfaces (14) for the knife shafts (2) are injected. Messerwellen-Abstreifvorrichtung nach Anspruch 1 und einem oder mehreren der weiteren Ansprüche, dadurch gekennzeichnet, daß in das Gehäuseunterteil (7) bzw. in das Gehäuseoberteil (11) der Schriftgutvernichters die Aufnahme (8) für den Abstreifblock (6), die Stützstege (5), Lagerflächen (14) für die Messerwellen (2), eine Aufnahme (15) für einen Antriebsmotor (16) und Lagerflächen (17) für ein Getriebe (18) eingespritzt sind.Knife shaft stripping device according to claim 1 and one or more of the further claims, characterized in that the receptacle (8) for the document shredder is in the lower housing part (7) or in the upper housing part (11) Scraper block (6), the support webs (5), bearing surfaces (14) for the knife shafts (2), a receptacle (15) for a drive motor (16) and bearing surfaces (17) for a gear (18) are injected.
EP92102655A 1991-03-04 1992-02-15 Stripping assembly for the cutting rollers of a document shredder Expired - Lifetime EP0502355B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4106792 1991-03-04
DE4106792A DE4106792C1 (en) 1991-03-04 1991-03-04

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EP0502355A1 true EP0502355A1 (en) 1992-09-09
EP0502355B1 EP0502355B1 (en) 1995-06-28

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US (1) US5400978A (en)
EP (1) EP0502355B1 (en)
AT (1) ATE124296T1 (en)
DE (2) DE4106792C1 (en)
DK (1) DK0502355T3 (en)
ES (1) ES2075492T3 (en)
GR (1) GR3017227T3 (en)

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DE19610048A1 (en) * 1996-03-14 1997-09-18 Schleicher & Co Int Document shredder
WO1999001223A3 (en) * 1997-07-04 1999-03-25 Dahle Buero Technik Document shredder

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DE19712661C2 (en) * 1997-03-26 2003-04-10 Schleicher & Co Int Ag Scraper for a cutter of a document shredder
US5826809A (en) * 1997-04-30 1998-10-27 Fellowes Manufacturing Company Support for cutting cylinders in a paper shredder
US5961059A (en) * 1997-04-30 1999-10-05 Fellowes Manufacturing Company Support for drive system in a paper shredder
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US20100176231A1 (en) * 2009-01-14 2010-07-15 Michilin Prosperity Co., Ltd. Package-type break-preventing device for rotary shafts of a shredder
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EP0441182A1 (en) * 1990-02-03 1991-08-14 GEHA-WERKE GmbH Stripper for the knife carrier of a document shredder
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DE19610048A1 (en) * 1996-03-14 1997-09-18 Schleicher & Co Int Document shredder
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WO1999001223A3 (en) * 1997-07-04 1999-03-25 Dahle Buero Technik Document shredder

Also Published As

Publication number Publication date
EP0502355B1 (en) 1995-06-28
DK0502355T3 (en) 1995-11-06
GR3017227T3 (en) 1995-11-30
DE4106792C1 (en) 1992-08-27
DE59202644D1 (en) 1995-08-03
US5400978A (en) 1995-03-28
ES2075492T3 (en) 1995-10-01
ATE124296T1 (en) 1995-07-15

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