EP0065652A2 - Knife carrier for a wood chipper with a cutter shaft - Google Patents

Knife carrier for a wood chipper with a cutter shaft Download PDF

Info

Publication number
EP0065652A2
EP0065652A2 EP82103445A EP82103445A EP0065652A2 EP 0065652 A2 EP0065652 A2 EP 0065652A2 EP 82103445 A EP82103445 A EP 82103445A EP 82103445 A EP82103445 A EP 82103445A EP 0065652 A2 EP0065652 A2 EP 0065652A2
Authority
EP
European Patent Office
Prior art keywords
knife
cutting
cutting knife
wear
strip
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.)
Withdrawn
Application number
EP82103445A
Other languages
German (de)
French (fr)
Other versions
EP0065652A3 (en
Inventor
Dieter Kratzberger
Harro Kröcher
Arnold Schmidt
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.)
HOMBAK MASCHINENFABRIK GmbH U CO KG
Original Assignee
HOMBAK MASCHINENFABRIK GmbH U CO KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by HOMBAK MASCHINENFABRIK GmbH U CO KG filed Critical HOMBAK MASCHINENFABRIK GmbH U CO KG
Publication of EP0065652A2 publication Critical patent/EP0065652A2/en
Publication of EP0065652A3 publication Critical patent/EP0065652A3/en
Withdrawn legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27G—ACCESSORY MACHINES OR APPARATUS FOR WORKING WOOD OR SIMILAR MATERIALS; TOOLS FOR WORKING WOOD OR SIMILAR MATERIALS; SAFETY DEVICES FOR WOOD WORKING MACHINES OR TOOLS
    • B27G13/00—Cutter blocks; Other rotary cutting tools
    • B27G13/02—Cutter blocks; Other rotary cutting tools in the shape of long arbors, i.e. cylinder cutting blocks
    • B27G13/04—Securing the cutters by mechanical clamping means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27L—REMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
    • B27L11/005—Tools therefor
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1928—Tool adjustable relative to holder
    • Y10T407/193—Radially
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/19—Rotary cutting tool
    • Y10T407/1906—Rotary cutting tool including holder [i.e., head] having seat for inserted tool
    • Y10T407/1934—Rotary cutting tool including holder [i.e., head] having seat for inserted tool with separate means to fasten tool to holder
    • Y10T407/1938—Wedge clamp element
    • Y10T407/194—Resilient clamp jaw
    • 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
    • Y10T407/00—Cutters, for shaping
    • Y10T407/22—Cutters, for shaping including holder having seat for inserted tool
    • Y10T407/2268—Cutters, for shaping including holder having seat for inserted tool with chip breaker, guide or deflector

Definitions

  • the invention relates to a knife holder for the installation of regrindable cutting knives in the knife shaft of a wood-cutting machine, consisting of a knife holder, which has a web that extends over most of the length of the cutting knife and is narrow in relation to the cutting knife height, on which holding tabs sit over a T eiliere of the cutting blade extending and have elongated holes, extend through the clamping screws, with which the knife carrier is slidably and fixably approximately at the back of the cutting knife in the radial direction, firmly arranged from a in the knife shaft body, the cutting blade supernatant determined stop surface on which the knife carrier rests loosely, from a wear bar, which is fixed in the knife shaft body via an approximately positive locking in the radial direction, against which the cutting knife is supported with its back and from a bottle pressing the cutting knife against the wear bar ieh wedge.
  • the knife is therefore held in a force-locking manner only.
  • the knife clamp bar which is positively fixed in the knife shaft body, is provided between the centrifugal wedge and the knife face.
  • the stop surface supporting the knife carrier consists of a holding strip screwed to the knife shaft body, which, seen in the radial direction, lies below the cutting knife and the knife carrier.
  • the peripheral recess to be provided in the knife shaft for receiving the knife holder must therefore be formed deeper than the knife width in order to be able to additionally accommodate the holding strip mentioned.
  • the invention has for its object to simplify the design of the knife holder explained above.
  • the positive connection provided for the knife terminal block in the known embodiment is formed in the knife holder according to the invention behind the knife back between the knife carrier and wear strip.
  • the knife holder and thus also the knife screwed to it are thus held directly in a form-fitting manner in the wear strip; the cutting knife is therefore secured against displacement in the radial direction. Therefore, it is possible according to the invention to dispense with the knife terminal block required in the previously known construction and to let the centrifugal wedge rest directly on the knife breast.
  • the new knife holder therefore consists of fewer parts.
  • the form-locking or retaining strip can also be dispensed with as a result of the omission of the knife clamping strip, there is the possibility that the positive-fit connection holding the wear strip in the knife shaft body lies completely behind the back of the cutting knife.
  • the peripheral recess receiving the knife holder need only be formed as deep as is necessary for receiving the cutting knife; there are no longer any parts under the cutting knife.
  • the positive engagement holding the wear strip can be hook-shaped in the usual way and can be formed by a retaining strip which is screwed to the knife shaft body or otherwise firmly connected.
  • permanent magnets can be arranged in the form-fitting groove of the wear strip, against which said web of the knife carrier bears.
  • This allows knives, knife carriers and wear strips to be removed as a package remove the knife shaft or insert it into the knife shaft; nevertheless, the cutting knife screwed to the knife carrier is easily separable from the wear strip, for example for grinding the cutting knives.
  • the unit of cutting knife and knife holder is retained during the grinding process.
  • the sharpened cutting knives are adjusted on a special adjusting device, the web of the knife holder again forming the reference edge. For the adjustment only the tensioning screws are loosened a little and tightened again after the adjustment of the cutting knife.
  • centrifugal wedge rests against the knife breast via a wear bar that is detachably connected to it.
  • This wear bar is independent of the length of the chips to be produced and can be easily replaced.
  • the new knife holder is generally suitable for comb knives or so-called double-comb knives, but also for knives with a continuous cutting edge.
  • the wear strip insertion slots may then have, in the rectangular form-locking R itzerplättchen inserted and held by the cutting blade.
  • Each scoring plate can have a pin that projects beyond it on both sides and engages in insertion grooves of the wear strip that are open to the cutting knife.
  • the new holder therefore allows the change from comb knives to knives with a continuous cutting edge.
  • the new system has a high setting accuracy for the cutting knives and leads to low additional costs for knife grinding.
  • the wear strip arranged behind the knife can also serve as a scoring carrier.
  • the knife holder shown serves to fix a cutting knife 1 in a knife shaft.
  • the cutting knife 1 has a continuous cutting edge in the illustrated embodiment.
  • the knife holder consists of a knife holder 2, which has a web 2a, which extends over the major part of the cutting knife length and is narrow compared to the cutting knife height, on which there are holding tabs 2b which extend over a partial height of the cutting knife and have elongated holes 3 (see FIG. 3 ). Through the elongated holes 3, clamping screws 4 protrude, with which the knife carrier on the back 1b of the cutting knife 1 is held approximately in the radial direction and can be locked.
  • a holding bar 6 is screwed into the knife shaft body 5, which has a hook-shaped form fit 7 into which a wear bar 8 engages, against which the cutting knife 1 is supported with its back 1b.
  • the wear strip 8 has a form-fitting groove 9 which is open to the cutting knife 1 and into which the web 2a the knife holder 2 is inserted positively.
  • the form-fitting groove 9 forms a stop surface 9a for the web 2a, by means of which the protrusion of the cutting edge of the cutting knife over the surface of the knife shaft is determined.
  • Permanent magnets 10 are arranged in the form-fitting groove 9, against which said web 2a of the knife carrier 2 rests releasably.
  • the wear strip 8 also has insertion slots 11 into which rectangular scoring plates 12 are inserted in a form-fitting manner and held by the cutting knife 1.
  • Each scoring plate 12 has a pin 13 projecting over it on both sides, which engages in insertion grooves 14 of the wear strip 8 which are open to the cutting knife 1 (see FIG. 2).
  • the knife holder further comprises a centrifugal wedge 15 which bears against the breast 1a of the cutting knife 1 via a wear bar 16 releasably connected to it and presses the latter against the wear bar 8 with its back 1b.
  • the wear strip 16 of the centrifugal wedge 15 is wedge-shaped in its area directed against the knife edge.
  • the outer end of a leaf spring 17 is screwed onto the wear strip 8, the inner end of which is inserted into a corresponding recess 18 in the holding strip 6.
  • the leaf spring 17 is designed so that it tries to pull the wear strip 8 into the form fit 7.
  • the knife 1, knife carrier 2 and wear strip 8 can be removed from the knife shaft as a package, the leaf spring 17 from the.
  • comb knives are used for the new knife holder, in which no scoring plates 12 are used, it is advantageous if a comb strip 19 made of high-quality steel is screwed between the centrifugal wedge 15 and its wear strip 16.
  • This comb strip reduces wear in the flanks of the chip flow and can be replaced in a simple manner if necessary.
  • the wear strip 16 assigned to the centrifugal wedge can be retained in all systems, that is to say also when using knives with a continuous cutting edge, which then require the use of scoring plates.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Manufacturing & Machinery (AREA)
  • Details Of Cutting Devices (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)

Abstract

Die Erfindung betrifft eine Messerhalterung für den Einbau von Schneidmessern (1) in die Messerwelle einer Holzzerspanungsmaschine, bestehend aus einem Messerträger (2), der lose auf einer Anschlagfläche (9a) aufliegt sowie aus einer formschlüssig (7) im Messerwellenkörper (5) gehaltenen Verschließleiste (8), gegen die das Schneidmesser (1) mit seinem Rücken (1b) durch einen Fliehkeil (15) gedrückt wird. Als neu wird in erster Linie angesehen, daß die Verschleißleiste (8) eine zum Schneidmesser (1) offene, die genannte Anschlagfläche (9a) bildende Formschlußnut (9) aufweist, in die der Messerträger (2) formschlüssig eingeschoben ist, und daß der Fliehkeil (15) unmittelbar an der Brust (1a) des Schneidmessers (1) anliegt.The invention relates to a knife holder for the installation of cutting knives (1) in the knife shaft of a wood-cutting machine, consisting of a knife holder (2) which rests loosely on a stop surface (9a) and a sealing bar (7) held in the knife shaft body (5) (8) against which the cutting knife (1) is pressed with its back (1b) by a centrifugal wedge (15). It is considered new that the wear strip (8) has a form-fitting groove (9) which is open to the cutting knife (1) and forms the abovementioned stop surface (9a) and into which the knife carrier (2) is inserted in a form-fitting manner, and that the centrifugal wedge (15) rests directly on the breast (1a) of the cutting knife (1).

Description

Die Erfindung betrifft eine Messerhalterung für den Einbau von nachschleifbaren Schneidmessern in die Messerwelle einer Holzzerspanungsmaschine, bestehend aus einem Messerträger, der einen sich über den größten Teil der Schneidmesserlänge erstreckenden,"gegenüber der Schneidmesserhöhe'schmal ausgebildeten Steg aufweist, an dem Haltelaschen 'sitzen, die sich über eine Teilhöhe des Schneidmessers erstrecken und Langlöcher aufweisen, durch die Spannschrauben ragen, mit denen der Messerträger am Rücken des Schneidmessers angenähert in Radialrichtung verschiebbar und feststellbar gehalten ist, aus einer fest im Messerwellenkörper angeordneten, den Schneidmesserüberstand bestimmenden Anschlagfläche, auf der der Messerträger lose aufliegt, aus einer über einen angenähert in Radialrichtung wirkenden Formschluß im Messerwellenkörper festgelegten Verschleißleiste, gegen die sich das Schneidmesser mit seinem Rücken abstützt und aus einem das Schneidmesser gegen die Verschleißleiste drückenden Fliehkeil.The invention relates to a knife holder for the installation of regrindable cutting knives in the knife shaft of a wood-cutting machine, consisting of a knife holder, which has a web that extends over most of the length of the cutting knife and is narrow in relation to the cutting knife height, on which holding tabs sit over a T eilhöhe of the cutting blade extending and have elongated holes, extend through the clamping screws, with which the knife carrier is slidably and fixably approximately at the back of the cutting knife in the radial direction, firmly arranged from a in the knife shaft body, the cutting blade supernatant determined stop surface on which the knife carrier rests loosely, from a wear bar, which is fixed in the knife shaft body via an approximately positive locking in the radial direction, against which the cutting knife is supported with its back and from a bottle pressing the cutting knife against the wear bar ieh wedge.

Eine derartige Ausführungsform läßt sich dem deutschen Gebrauchsmuster 80 02 428 entnehmen. Das Schneidmesser liegt mit seiner Brust lose gegen eine Messerklemmleiste an, die über einen Formschluß im Messerwellenkörper gehalten und von dem Fliehkeil beaufschlagt wird, der die Klemmleiste gegen die Messerbrust und dadurch das Schneidmesser gegen die Verschleißleiste drückt. Das Schneidmesser ist zusammen mit dem mit ihm verschraubten Messerträger lose in einen angenähert radial liegenden Einschubschlitz der Verschleißleiste eingeschoben und liegt mit kurzen Anschlagflächen des Messerträgers lose auf der genannten Anschlagfläche im Messerwellenkörper auf.Such an embodiment can be found in German utility model 80 02 428. The cutting knife lies with its chest loosely against a knife terminal block, which over is held in a form-fitting diameter shaft body and lent a wedge acted upon by the F that presses the clamping strip against the knife breast and thereby the cutting knife against the wear bar. The cutting knife, together with the knife holder screwed to it, is loosely inserted into an approximately radial insertion slot of the wear strip and, with short stop surfaces of the knife holder, lies loosely on the mentioned stop surface in the knife shaft body.

Bei dieser vorbekannten Konstruktion ist das Messer somit ausschließlich kraftschlüssig gehalten. Um zu verhindern, daß der unter der Fliehkraftwirkung radial nach außen gezogene Fliehkeil die Lage des Schneidmessers im Messerwellenkörper-und damit den Meserüberstand über die Oberfläche der Messerwelle ändert, ist die formschlüssig im Messerwellenkörper festgelegte Messerklemmdeiste zwischen Fliehkeil und Messerbrust vorgesehen.In this known construction, the knife is therefore held in a force-locking manner only. In order to prevent the centrifugal wedge, which is pulled radially outwards under the action of centrifugal force, from changing the position of the cutting knife in the knife shaft body - and thus the knife protrusion over the surface of the knife shaft - the knife clamp bar, which is positively fixed in the knife shaft body, is provided between the centrifugal wedge and the knife face.

Die den Messerträger abstützende Anschlagfläche besteht aus einer mit dem Messerwellenkörper verschraubten Halteleiste, die in Radialrichtung gesehen unterhalb des Schneidmessers sowie des Messerträgers liegt. Die in der Messerwelle vorzusehende periphere Ausnehmung zur Aufnahme der Messerhalterung muß daher tiefer als die Messerbreite ausgebildet sein, um zusätzlich die genannte Halteleiste aufnehmen zu können.The stop surface supporting the knife carrier consists of a holding strip screwed to the knife shaft body, which, seen in the radial direction, lies below the cutting knife and the knife carrier. The peripheral recess to be provided in the knife shaft for receiving the knife holder must therefore be formed deeper than the knife width in order to be able to additionally accommodate the holding strip mentioned.

Der Erfindung liegt die Aufgabe zugrunde, die eingangs erläuterte Messerhalterung konstruktiv zu vereinfachen.The invention has for its object to simplify the design of the knife holder explained above.

Diese Aufgabe wird gemäß der Erfindung durch folgende Merkmale gelöst:

  • a) Die Verschleißleiste weist eine zum Schneidmesser offene, die genannte Anschlagfläche bildende Formschlußnut auf, in die der Steg des Messerträgers formschlüssig eingeschoben ist;
  • b) der Fliehkeil liegt mit einer Keilfläche unmittelbar an der' Brust des Schneidmessers an.
This object is achieved according to the invention by the following features:
  • a) The wear bar has an open to the cutting knife, the aforementioned stop surface forming positive locking groove, in which the bar of the knife holder is inserted in a form-fitting manner;
  • b) the centrifugal wedge lies with a wedge surface directly on the 'breast of the cutting knife.

Der bei der vorbekannten Ausführungsform für die Messerklemmleiste vorgesehene Formschluß wird bei der Messerhalterung gemäß der Erfindung hinter dem Messerrücken zwischen Messerträger und Verschleißleiste gebildet. Der Messerträger und damit auch das mit ihm verschraubte Messer sind somit unmittelbar formschlüssig in der Verschleißleiste gehalten; das Schneidmesser ist also in Radialrichtung gegen Verschiebung gesichert. Deshalb ist es erfindungsgemäß möglich, auf die bei der vorbekannten Konstruktion erforderliche Messerklemmleiste zu verzichten und den Fliehkeil unmittelbar an der Messerbrust anliegen zu lassen. Die neue Messerhalterung besteht somit aus weniger Teilen. Da durch den Wegfall der Messerklemmleiste auch deren Formschluß bzw. Halteleiste entfallen kann, besteht die Möglichkeit, daß der die Verschleißleiste im Messerwellenkörper haltende Formschluß vollständig hinter dem Rücken des Schneidmessers liegt. Dadurch braucht die die Messerhalterung aufnehmende periphere Ausnehmung nur so tief ausgebildet zu werden, wie es zur Aufnahme des Schneidmessers erforderlich ist; es gibt also keine Teile mehr, die das Schneidmesser untergreifen. Der die Verschleißleiste haltende Formschluß kann in üblicher Weise hakenförmig ausgebildet sein und durch eine Halteleiste gebildet werden, die mit dem Messerwellenkörper verschraubt oder sonstwie fest verbunden wird.The positive connection provided for the knife terminal block in the known embodiment is formed in the knife holder according to the invention behind the knife back between the knife carrier and wear strip. The knife holder and thus also the knife screwed to it are thus held directly in a form-fitting manner in the wear strip; the cutting knife is therefore secured against displacement in the radial direction. Therefore, it is possible according to the invention to dispense with the knife terminal block required in the previously known construction and to let the centrifugal wedge rest directly on the knife breast. The new knife holder therefore consists of fewer parts. Since the form-locking or retaining strip can also be dispensed with as a result of the omission of the knife clamping strip, there is the possibility that the positive-fit connection holding the wear strip in the knife shaft body lies completely behind the back of the cutting knife. As a result, the peripheral recess receiving the knife holder need only be formed as deep as is necessary for receiving the cutting knife; there are no longer any parts under the cutting knife. The positive engagement holding the wear strip can be hook-shaped in the usual way and can be formed by a retaining strip which is screwed to the knife shaft body or otherwise firmly connected.

In einer zweckmäßigen Ausführungsform können in der Formschlußnut der Verschleißleiste Permanentmagnete angeordnet sein, gegen die der genannte Steg des Messerträgers anliegt. Dadurch lassen sich Messer, Messerträger und Verschleißleiste als Paket aus der Messerwelle herausnehmen bzw. in die Messerwelle einsetzen; dennoch ist das mit dem Messerträger verschraubte Schneidmesser von der Verschleißleiste leicht trennbar, beispielsweise zum Schleifen der Schneidmesser. Beim Schleifvorgang bleibt die Einheit von Schneidmesser und Messerträger erhalten. Die Einstellung der scharf geschliffenen Schneidmesser erfolgt auf einer speziellen Einstellvorrichtung, wobei wiederum der Steg des Messerträgers die Bezugskante bildet. Zur Einstellung werden lediglich die Spannschrauben etwas gelockert und nach der Justierung des Schneidmessers wieder fest angezogen.In an expedient embodiment, permanent magnets can be arranged in the form-fitting groove of the wear strip, against which said web of the knife carrier bears. This allows knives, knife carriers and wear strips to be removed as a package remove the knife shaft or insert it into the knife shaft; nevertheless, the cutting knife screwed to the knife carrier is easily separable from the wear strip, for example for grinding the cutting knives. The unit of cutting knife and knife holder is retained during the grinding process. The sharpened cutting knives are adjusted on a special adjusting device, the web of the knife holder again forming the reference edge. For the adjustment only the tensioning screws are loosened a little and tightened again after the adjustment of the cutting knife.

Es ist ferner zweckmäßig, wenn der Fliehkeil über eine lösbar mit ihm verbundene Verschleißleiste an der Messerbrust anliegt. Diese Verschleißleiste ist unabhängig von der Länge der jeweils herzustellenden Späne und läßt sich leicht auswechseln.It is also expedient if the centrifugal wedge rests against the knife breast via a wear bar that is detachably connected to it. This wear bar is independent of the length of the chips to be produced and can be easily replaced.

Die neue Messerhalterung eignet sich grundsätzlich für Kamm- ' messer oder sogenannte Doppelkamm-Messer, aber auch für Messer mit durchgehender Schneide. In diesem Fall kann dann die Verschleißleiste Einschubschlitze aufweisen, in die rechteckige Ritzerplättchen formschlüssig eingeschoben und durch das Schneidmesser gehalten sind. Dabei kann jedes Ritzerplättchen einen ihn beidseitig überragenden Stift aufweisen, der in zum Schneidmesser offene Einschubnuten der Verschleißleiste eingreift.The new knife holder is generally suitable for comb knives or so-called double-comb knives, but also for knives with a continuous cutting edge. In this case, the wear strip insertion slots may then have, in the rectangular form-locking R itzerplättchen inserted and held by the cutting blade. Each scoring plate can have a pin that projects beyond it on both sides and engages in insertion grooves of the wear strip that are open to the cutting knife.

Die neue Halterung gestattet also die Umstellung von Kammmessern auf Messer mit durchgehender Schneide. Das neue System weist eine hohe Einstellgenauigkeit für die Schneidmesser auf und führt zu niedrigen Nebenkosten beim Messerschleifen. Die hinter dem Messer angeordnete Verschleißleiste kann gleichzeitig als Ritzerträger dienen.The new holder therefore allows the change from comb knives to knives with a continuous cutting edge. The new system has a high setting accuracy for the cutting knives and leads to low additional costs for knife grinding. The wear strip arranged behind the knife can also serve as a scoring carrier.

Weitere Merkmale der Erfindung sind Gegenstand der Unteransprüche.Further features of the invention are the subject of the dependent claims.

In der Zeichnung ist eine als Beispiel dienende Ausführungsform der Erfindung dargestellt. Es zeigen:

  • Figur 1 im Ausschnitt einen Querschnitt durch eine in eine Messerwelle eingebaute Messerhalterung;
  • Figur 2 im Ausschnitt eine Draufsicht gemäß Blickrichtung Ä in Figur 1;
  • Fiqur 3 eine Draufsicht auf den Rücken eines Schneidmessers, das mit einem Messerträger verbunden ist;
  • Figur 4 eine abgewandelte Ausführungsform in einer Darstellung gemäß Figur 1 und
  • Figur 5 die in Fiqur 4 im Querschnitt dargestellte Kammleiste in Draufsicht.
In the drawing, an exemplary embodiment of the invention is shown. Show it:
  • 1 shows a detail of a cross section through a knife holder installed in a knife shaft;
  • FIG. 2 shows a detail of a top view in the viewing direction A in FIG. 1;
  • F iQur 3 is a plan view of the back of a cutting knife, which is connected to a blade carrier;
  • Figure 4 shows a modified embodiment in a representation according to Figure 1 and
  • 5 shows the comb strip shown in cross section in FIG. 4 in plan view.

Die dargestellte Messerhalterung dient zur Festlegung eines Schneidmessers 1 in einer Messerwelle. Das Schneidmesser 1 weist bei dem dargestellten Ausführungsbeispiel eine durchgehende Schneide auf.The knife holder shown serves to fix a cutting knife 1 in a knife shaft. The cutting knife 1 has a continuous cutting edge in the illustrated embodiment.

Die Messerhalterung besteht aus einem Messerträger 2, der einen sich über den größten Teil der Schneidmesserlänge erstreckenden, gegenüber der Schneidmesserhöhe schmal ausgebildeten Steg 2a aufweist, an dem Haltelaschen 2b sitzen, die sich über eine Teilhöhe des Schneidmessers erstrecken und Langlöcher 3 aufweisen (siehe Figur 3). Durch die Langlöcher 3 ragen Spannschrauben 4, mit denen der Messerträger am Rücken 1b des Schneidmessers 1 angenähert in Radialrichtung verschiebbar und feststellbar gehalten ist.The knife holder consists of a knife holder 2, which has a web 2a, which extends over the major part of the cutting knife length and is narrow compared to the cutting knife height, on which there are holding tabs 2b which extend over a partial height of the cutting knife and have elongated holes 3 (see FIG. 3 ). Through the elongated holes 3, clamping screws 4 protrude, with which the knife carrier on the back 1b of the cutting knife 1 is held approximately in the radial direction and can be locked.

In den Messerwellenkörper 5 ist eine Halteleiste 6 eingeschraubt, die einen hakenförmigen Formschluß 7 aufweist, in den eine Verschleißleiste 8 eingreift, gegen die sich das Schneidmesser 1 mit seinem Rücken 1b abstützt. Die Verschleißleiste 8 weist eine zum Schneidmesser 1 offene Formschlußnut 9 auf, in die der Steg 2a des Messerträgers 2 formschlüssig eingeschoben ist. Die Formschlußnut 9 bildet für den Steg 2a eine Anschlagfläche 9a, durch die der überstand der Schneide des Schneidmessers über die Oberfläche der Messerwelle bestimmt wird. In der Formschlußnut 9 sind Permanentmagnete 10 angeordnet, gegen die der genannte Steg 2a des Messerträgers 2 lösbar anliegt.A holding bar 6 is screwed into the knife shaft body 5, which has a hook-shaped form fit 7 into which a wear bar 8 engages, against which the cutting knife 1 is supported with its back 1b. The wear strip 8 has a form-fitting groove 9 which is open to the cutting knife 1 and into which the web 2a the knife holder 2 is inserted positively. The form-fitting groove 9 forms a stop surface 9a for the web 2a, by means of which the protrusion of the cutting edge of the cutting knife over the surface of the knife shaft is determined. Permanent magnets 10 are arranged in the form-fitting groove 9, against which said web 2a of the knife carrier 2 rests releasably.

Die Verschleißleiste 8 weist außerdem Einschubschlitze 11 auf, in die rechteckige Ritzerplättchen 12 formschlüssig eingeschoben und durch das Schneidmesser 1 gehalten sind. Jedes Ritzerplättchen 12 weist einen ihn beidseitig überragenden Stift 13 auf, der in zum Schneidmesser 1 offene Einschubnuten 14 der Verschleißleiste 8 eingreift (siehe Figur 2).The wear strip 8 also has insertion slots 11 into which rectangular scoring plates 12 are inserted in a form-fitting manner and held by the cutting knife 1. Each scoring plate 12 has a pin 13 projecting over it on both sides, which engages in insertion grooves 14 of the wear strip 8 which are open to the cutting knife 1 (see FIG. 2).

Die Messerhalterung umfaßt ferner einen Fliehkeil 15, der über eine lösbar mit ihm verbundene Verschleißleiste 16 an der Brust 1a des Schneidmessers 1 anliegt und letzteres mit seinem Rücken 1b gegen die Verschleißleiste 8 drückt. Die Verschleißleiste 16 des Fliehkeils 15 ist in ihrem gegen die Messerschneide gerichteten Bereich keilförmig ausgebildet.The knife holder further comprises a centrifugal wedge 15 which bears against the breast 1a of the cutting knife 1 via a wear bar 16 releasably connected to it and presses the latter against the wear bar 8 with its back 1b. The wear strip 16 of the centrifugal wedge 15 is wedge-shaped in its area directed against the knife edge.

Bei der in Figur 4 dargestellten abgewandelten Ausführungsform ist an der Verschleißleiste 8 das äußere Ende einer Blattfeder 17 angeschraubt, deren inneres Ende in eine entsprechende Ausnehmung 18 der Halteleiste 6 gesteckt ist. Die Blattfeder 17 ist so ausgelegt, daß sie die Verschleißleiste 8 in den Formschluß 7 zu ziehen versucht. Auch bei dieser Ausführungsform lassen sich Messer 1, Messerträger 2 und Verschleißleiste 8 als Paket aus der Messerwelle herausnehmen, wobei die Blattfeder 17 aus der. Ausnehmung 18 der HalteleisteIn the modified embodiment shown in FIG. 4, the outer end of a leaf spring 17 is screwed onto the wear strip 8, the inner end of which is inserted into a corresponding recess 18 in the holding strip 6. The leaf spring 17 is designed so that it tries to pull the wear strip 8 into the form fit 7. In this embodiment too, the knife 1, knife carrier 2 and wear strip 8 can be removed from the knife shaft as a package, the leaf spring 17 from the. Recess 18 of the retaining strip

herausgezogen wird. Umgekehrt wird bei der Montage des genannten Paketes das innere Ende der Blattfeder 17 in die genannte Ausnehmung 18 gesteckt; das genannte Paket wird dann weiter in angenähert radialer Richtung nach innen gedrückt, bis die Verschleißleiste 8 unter der Wirkung der Blattfeder 17 in. den Formschluß 7 einschnappt.is pulled out. Conversely, when assembling said package, the inner end of leaf spring 17 is inserted into said recess 18; the named package will then further pressed inwards in an approximately radial direction until the wear strip 8 snaps into the positive locking 7 under the action of the leaf spring 17.

Werden für die neue Messerhalterung Kammesser verwendet, bei denen also keine Ritzerplättchen 12 Verwendung finden, ist es vorteilhaft, wenn zwischen den Fliehkeil 15 und seine Verschleißleiste 16 eine dem Kammesser angepaßte Kammleiste 19 aus hochwertigem Stahl geschraubt wird. Diese Kammleiste verringert den Verschleiß in den Flanken des Spanablaufes und läßt sich erforderlichenfalls in einfacher Weise austauschen. Die dem Fliehkeil zugeordnete Verschleißleiste 16 kann bei allen Systemen beibehalten werden, also auch bei Verwendung von Messern mit durchgehender Schneide, die dann die Verwendung von Ritzerplättchen erfordern.If comb knives are used for the new knife holder, in which no scoring plates 12 are used, it is advantageous if a comb strip 19 made of high-quality steel is screwed between the centrifugal wedge 15 and its wear strip 16. This comb strip reduces wear in the flanks of the chip flow and can be replaced in a simple manner if necessary. The wear strip 16 assigned to the centrifugal wedge can be retained in all systems, that is to say also when using knives with a continuous cutting edge, which then require the use of scoring plates.

Claims (9)

1. Messerhalterung für den Einbau von nachschleifbaren Schneidmessern (1) in die Messerwelle einer Holzzerspanungsmaschine, bestehend
aus einem Messerträger (2), der einen sich über den größten Teil der Schneidmesserlänge erstreckenden, gegenüber der Schneidmesserhöhe schmal ausgebildeten Steg (2a) aufweist, an dem Haltelaschen (2b) sitzen, die sich über eine Teilhöhe des Schneidmessers erstrecken und Langlöcher (3) aufweisen, durch die Spannschrauben (4) ragen, mit denen der Messerträger am Rücken (1b) des Schneidmessers angenähert in Radialrichtung verschiebbar und feststellbar gehalten ist, aus einer fest im Messerwellenkörper (5) angeordneten, den Schneidmesserüberstand bestimmenden Anschlagfläche (9a), auf der der Messerträger (2) lose aufliegt, aus einer über einen angenähert in Radialrichtung wirkenden Formschluß (7) im Messerwellenkörper (5) festgelegten Verschleißleiste (8), gegen die sich das Schneidmesser (1) mit seinem Rücken (1b) abstützt und aus einem das Schneidmesser (1) gegen die Verschleißleiste (8) drückenden Fliehkeil (15), gekennzeichnet durch folgende Merkmale: a) Die Verschleißleiste (8) weist eine zum Schneidmesser (1) offene, die genannte Anschlagfläche (9a) bildende Form-. schlußnut (9) auf, in die der Steg (2a) des Messerträgers (2) formschlüssig eingeschoben ist; b) der Fliehkeil (15) liegt mit einer Keilfläche unmittelbar an der Brust (1a) des Schneidmessers (1) an. 1. Knife holder for the installation of regrindable cutting knives (1) in the knife shaft of a wood cutting machine
from a knife carrier (2) which has a web (2a) which extends over the major part of the cutting knife length and is narrow compared to the cutting knife height, on which there are holding tabs (2b) which extend over a partial height of the cutting knife and elongated holes (3) protrude through the clamping screws (4) with which the knife holder on the back (1b) of the cutting knife is held approximately in the radial direction and can be locked, from a stop surface (9a) which is fixed in the knife shaft body (5) and determines the cutting knife projection the knife carrier (2) rests loosely, from a wear bar (8) which is fixed in the knife shaft body (5) via an approximately radially positive connection (7), against which the cutting knife (1) is supported with its back (1b) and from which the Cutting knife (1) against the wear bar (8) pressing centrifugal wedge (15), characterized by the following features: a) The wear bar (8) has an open to the cutting knife (1), the abovementioned stop surface (9a) forming. closing groove (9) into which the web (2a) of the knife carrier (2) is inserted in a form-fitting manner; b) the centrifugal wedge (15) lies with a wedge surface directly on the chest (1a) of the cutting knife (1). 2. Messerhalterung nach Anspruch 1, dadurch gekennzeichnet, daß der die Verschleißleiste (8) im Messerwellenkörper (5) haltende Formschluß (7) vollständig hinter dem Rücken (1b) des Schneidmessers (1) liegt.2. Knife holder according to claim 1, characterized in that the wear strip (8) in the knife shaft body (5) holding positive connection (7) is completely behind the back (1b) of the cutting knife (1). 3. Messerhalterung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß in der Formschlußnut (9) der Verschleißleiste (8) Permanentmagnete (10) angeordnet sind,gegen die der genannte Steg (2a) des Messerträgers (2) anliegt.3. Knife holder according to claim 1 or 2, characterized in that in the form-fitting groove (9) of the wear strip (8) permanent magnets (10) are arranged, against which said web (2a) of the knife carrier (2) abuts. 4. Messerhalterung nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß der Fliehkeil (15) über eine lösbar mit ihm verbundene Verschleißleiste (16) an der Messerbrust (1a) anliegt.4. Knife holder according to claim 1, 2 or 3, characterized in that the centrifugal wedge (15) abuts a detachably connected wear strip (16) on the knife chest (1a). 5. Messerhalterung nach Anspruch 4, dadurch gekennzeichnet, daß die Verschleißleiste (16) des Fliehkeils (15) in ihrem gegen die Messerschneide gerichteten Bereich keilförmig ausgebildet ist.5. Knife holder according to claim 4, characterized in that the wear strip (16) of the centrifugal wedge (15) is wedge-shaped in its area directed against the knife edge. 6. Messerhalterung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Verschleißleiste (8) Einschubschlitze (11) aufweist, in die rechteckige Ritzerplättchen(12) formschlüssig eingeschoben und durch das Schneidmesser (1) gehalten sind.6. Knife holder according to one of the preceding claims, characterized in that the wear strip (8) has insertion slots (11), in the rectangular scoring plates (12) are positively inserted and are held by the cutting knife (1). 7. Messerhalterung nach Anspruch 6, dadurch gekennzeichnet, daß jedes Ritzerplättchen (12) einen ihn beidseitig überragenden Stift (13) aufweist, der in zum Schneidmesser (1) offene Einschubnuten (14) der Verschleißleiste (8) eingreift.7. Knife holder according to claim 6, characterized in that each scoring plate (12) has a pin (13) projecting on both sides thereof, which engages in the cutting knife (1) open insertion grooves (14) of the wear strip (8). 8. Messerhalterung nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß an der Verschleißleiste (8) das äußere Ende einer sie in den Formschluß (7) ziehenden Blattfeder (17) befestigt ist, deren inneres Ende in eine entsprechende Ausnehmung (18) des Messerwellenkörpers (5) gesteckt ist.8. M eater holder according to any one of the preceding claims, characterized in that the outer end of it is fixed to the form-fitting (7) withdrawing the leaf spring (17) on the wearing strip (8) of whose inner end in a corresponding recess (18) of the Knife shaft body (5) is inserted. 9. Messerhalterung nach einem der Ansprüche 4, 5 oder 8, dadurch gekennzeichnet, daß zwischen Verschleißleiste (16) und Fliehkeil (15) eine Kammleiste (19) aus hochwertigem Stahl geschraubt ist.9. Knife holder according to one of claims 4, 5 or 8, characterized in that between the wear strip (16) and centrifugal wedge (15) a comb strip (19) is screwed from high quality steel.
EP82103445A 1981-05-21 1982-04-23 Knife carrier for a wood chipper with a cutter shaft Withdrawn EP0065652A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3120249A DE3120249C2 (en) 1981-05-21 1981-05-21 "Knife holder for the knife shaft of a wood cutting machine"
DE3120249 1981-05-21

Publications (2)

Publication Number Publication Date
EP0065652A2 true EP0065652A2 (en) 1982-12-01
EP0065652A3 EP0065652A3 (en) 1984-03-28

Family

ID=6132901

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82103445A Withdrawn EP0065652A3 (en) 1981-05-21 1982-04-23 Knife carrier for a wood chipper with a cutter shaft

Country Status (4)

Country Link
US (1) US4470442A (en)
EP (1) EP0065652A3 (en)
CA (1) CA1186142A (en)
DE (1) DE3120249C2 (en)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3240667A1 (en) * 1982-11-04 1984-05-03 Reinhold W. Dr.-Ing. 5000 Köln Elsen Chipping machine
DE8301544U1 (en) * 1983-01-21 1983-07-07 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach, De SCRATCHER FOR A WOOD CHIPING TOOL
DE3316754C2 (en) * 1983-05-07 1986-01-09 Pallmann Maschinenfabrik GmbH & Co KG, 6660 Zweibrücken Knife holder for chipping machines
DE3415656C2 (en) * 1984-04-27 1986-03-06 Inter-Wood-Maschinen GmbH & Co KG, 8923 Lechbruck Knife holder for the bevel cutting knife head of a wood cutting machine
DE3517539A1 (en) * 1985-05-15 1986-11-20 Pallmann Maschinenfabrik GmbH & Co KG, 6660 Zweibrücken Mounting for exchangeable scratchers
DE59010420D1 (en) * 1989-11-17 1996-08-22 Peter Frey Consulting Centrifugal quick release device for planer knives
US5143311A (en) * 1990-05-17 1992-09-01 Newman Machine Company, Inc. Wood shavings forming apparatus and cutting roll adapted for use therewith
AT398403B (en) * 1993-03-23 1994-12-27 Boehler Ybbstalwerke KNIFE ROLLER AND COMB KNIFE FOR KNIFE SHAFT CUTTER
DE29506458U1 (en) * 1995-04-15 1995-07-06 Gebr. Leitz GmbH & Co, 73447 Oberkochen Knife head, in particular planer knife head
AT406132B (en) * 1998-05-28 2000-02-25 Boehler Miller Messer Und Saeg ARRANGEMENT OF A DISPOSABLE COMB KNIFE IN A KNIFE ROLLER
DE19947399C2 (en) * 1999-10-01 2001-07-26 Pallmann Kg Maschf Knife holder for a chipper device
DE10116691B4 (en) * 2001-04-04 2004-07-15 Pallmann Maschinenfabrik Gmbh & Co Kg Device for shredding fibrous feed material, in particular trunk wood
US7836923B2 (en) * 2002-10-25 2010-11-23 Key Knife, Inc. Ring slicer with easily removable knife and knife assembly
US7182112B2 (en) * 2003-06-27 2007-02-27 Designtek Llc Wood planing machine with an improved cutter head and method
CH709488A1 (en) 2014-04-14 2015-10-15 Oertli Werkzeuge Ag Tool head and method for inserting and clamping a cutting board and cutting board.
US11612943B2 (en) * 2019-08-01 2023-03-28 Iscar, Ltd. Insert adaptor and turning tool comprising same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2411978B2 (en) * 1974-03-13 1977-05-18 Maschinenfabrik B. Maier Kg, 4800 Bielefeld CUTTER SHAFT FOR A WOOD PROCESSING MACHINE
FR2332108A1 (en) * 1975-11-21 1977-06-17 Pessa Oleodinamica Wood comminution and chip production system - has roller with inbuilt knives and section breaker elements
DE2608056B2 (en) * 1976-02-27 1978-09-07 Hombak Maschinenfabrik Kg, 6550 Bad Kreuznach
DE3018359A1 (en) * 1980-05-14 1981-12-03 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach Blade adjusting device for woodworking machine - has abutment strip with slotted holes to provide radial adjustment

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1040072A (en) * 1975-07-14 1978-10-10 Arnold Schmidt Cutter shaft for wood machining apparatus
DE2730800C3 (en) * 1977-07-07 1980-02-21 Vereinigte Edelstahlwerke Ag (Vew), Wien Knife arrangement for a bevel cutter shaft of a wood cutting machine
DE8002428U1 (en) * 1980-01-31 1980-04-24 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach KNIFE SHAFT FOR THE PRODUCTION OF FLAT WOOD SHAVINGS

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2411978B2 (en) * 1974-03-13 1977-05-18 Maschinenfabrik B. Maier Kg, 4800 Bielefeld CUTTER SHAFT FOR A WOOD PROCESSING MACHINE
FR2332108A1 (en) * 1975-11-21 1977-06-17 Pessa Oleodinamica Wood comminution and chip production system - has roller with inbuilt knives and section breaker elements
DE2608056B2 (en) * 1976-02-27 1978-09-07 Hombak Maschinenfabrik Kg, 6550 Bad Kreuznach
DE3018359A1 (en) * 1980-05-14 1981-12-03 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach Blade adjusting device for woodworking machine - has abutment strip with slotted holes to provide radial adjustment

Also Published As

Publication number Publication date
CA1186142A (en) 1985-04-30
DE3120249C2 (en) 1983-03-17
EP0065652A3 (en) 1984-03-28
US4470442A (en) 1984-09-11
DE3120249A1 (en) 1982-12-23

Similar Documents

Publication Publication Date Title
EP0065652A2 (en) Knife carrier for a wood chipper with a cutter shaft
DE69306599T2 (en) Locking device for knives
DE2411759C3 (en) Cutting tool for machining
DE9213466U1 (en) Knife head
DE2848554C2 (en) Punching tool
DE3784775T2 (en) CROSS-CUTTING DEVICE FOR MATERIAL TAPES.
DE3540861C2 (en)
DE3140905C2 (en) Face milling cutter head
DE1436889B2 (en) Rotary punching device
DE2653830C2 (en) Knife sheath with a sharpening device
EP0033382B1 (en) Cutter block for producing plane matchwood
EP0104438A1 (en) Single-blade reamer
EP0088990A2 (en) Tool holder for a plane
DE2938201A1 (en) Steel strip blade tensioning unit - has height-compensation supports in blade shaft recesses for blade retainers
DE2152615A1 (en) CUTTING KNIFE FOR PAPER CUTTING OR DERGL. MACHINERY
DE10005467A1 (en) Cutter head
DE8115168U1 (en) KNIFE HOLDER FOR THE KNIFE SHAFT OF A WOOD CUTTING MACHINE
DE8002428U1 (en) KNIFE SHAFT FOR THE PRODUCTION OF FLAT WOOD SHAVINGS
DE9108553U1 (en) Cutter head, especially planer head
DE4424880C1 (en) Combing tool for wood machining
DE9105290U1 (en) Scissor cutting knife holder with shear angle adjustment
DE2330262C3 (en) Knife shaft for wood cutting machines
DE3406196C2 (en)
DE3018359A1 (en) Blade adjusting device for woodworking machine - has abutment strip with slotted holes to provide radial adjustment
DE1111800B (en) Rotating cutting tool, especially for woodworking

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE FR IT

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Designated state(s): AT BE FR IT

17P Request for examination filed

Effective date: 19840607

17Q First examination report despatched

Effective date: 19860213

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19861031

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHMIDT, ARNOLD

Inventor name: KRATZBERGER, DIETER

Inventor name: KROECHER, HARRO