EP0569345B1 - Apparatus for reducing root swellings on tree trunks - Google Patents

Apparatus for reducing root swellings on tree trunks Download PDF

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Publication number
EP0569345B1
EP0569345B1 EP93890081A EP93890081A EP0569345B1 EP 0569345 B1 EP0569345 B1 EP 0569345B1 EP 93890081 A EP93890081 A EP 93890081A EP 93890081 A EP93890081 A EP 93890081A EP 0569345 B1 EP0569345 B1 EP 0569345B1
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EP
European Patent Office
Prior art keywords
drivers
tree trunk
axis
cutting tool
supporting
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Expired - Lifetime
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EP93890081A
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German (de)
French (fr)
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EP0569345A1 (en
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Max Stingl
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Individual
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Individual
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27C—PLANING, DRILLING, MILLING, TURNING OR UNIVERSAL MACHINES FOR WOOD OR SIMILAR MATERIAL
    • B27C7/00—Wood-turning machines; Equipment therefor
    • B27C7/005—Wood-turning machines; Equipment therefor by means of a rotating tool
    • 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
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
    • 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
    • B27L11/007—Combined with manufacturing a workpiece

Definitions

  • the invention relates to a device for reducing the root ends of tree trunks with the features of the introductory part of independent claim 1.
  • a device for reducing the root ends of tree trunks which has several drivers which are oriented obliquely to the tree trunk and lateral support rollers on which the tree trunk rests.
  • the tree trunk is not only rotated about its longitudinal axis, but at the same time also moved in the longitudinal direction, so that its root end is guided against a milling tool which is not adjustable in the machine frame and has the shape of a milling drum.
  • the milling drum is inclined to the longitudinal axis of the tree trunk and is oriented so that it rises from the bottom to the top of the drivers so that its enveloping surface essentially tangentially touches the plane defined by the drivers from below.
  • the tree trunk is held by a holding device which engages the tree trunk from below and from above.
  • a milling tool onto a milling device fixedly arranged in the machine frame of the known device, so that swellings are milled off at the root end of the tree trunk.
  • AT-PS 366 9521 Another device for processing the root ends of tree trunks is known from AT-PS 366 951.
  • the tree trunk is also held from above and below and rotated with the aid of the holding devices about its longitudinal axis.
  • the milling tool provided in the device according to AT-PS 366 951 is moved to work the root end from a rest position located under the trunk into an active position adjacent to the trunk.
  • the tree trunk is held from below and from above and during processing, i.e. does not move in the longitudinal direction when reducing the root end.
  • the milling tool rotates in an axis substantially parallel to the longitudinal axis of the tree trunk, so that there is an unfavorable pressure angle for the cutting of the knives with which the milling tool is equipped, namely an engagement transverse to the wood fibers.
  • EP-A-477 166 works without any problems per se, but difficulties have sometimes arisen when tree trunks which have grown unevenly or have stumps are to be processed. With such tree trunks, the longitudinal movement of the tree trunk caused by the driven, inclined drivers is sometimes uneven or disturbed.
  • the invention has for its object to provide a device of the type mentioned, with which, if desired, fully automatically, swellings at the root end of tree trunks of any diameter can be removed without the tree trunk being moved in the longitudinal direction while being rotated about its longitudinal axis must and without that the favorable pressure angle of the milling tool on the tree trunk known from EP-A-477 166 is completely given up.
  • this object is achieved in a device of the type specified at the outset by the milling tool in the machine frame from a standby position in which it forms an acute angle with the axis of rotation of the tree trunk, is arranged pivotably while reducing this angle, that the top generatrix of the envelope surface of the milling tool in all positions of the milling tool is arranged essentially in the plane determined by the drivers, which support the tree trunk from below and set it in rotation.
  • the tree trunk is no longer moved in the longitudinal direction when it is rotated while processing its root end.
  • the milling tool swivels out of its position in which its axis forms a larger, acute angle with the axis of the tree trunk, into its end position, in which the axis of the milling tool forms a smaller, acute angle with the axis of rotation of the tree trunk. It is advantageous here that the milling tool can be moved during the machining process into an end position in which the conicity of a tree trunk, which is inherent in itself, is also retained in the root end, that is to say the root end is not milled out in a cylindrical manner as in some known devices.
  • An advantage of the device according to the invention is also that the drivers on which the tree trunk rests while it is being processed are rigidly mounted in the machine frame, so that their drive is simplified compared to the drive of the pivotable drivers of EP-A-477 166 .
  • the device 1 has a machine frame 10, which is a solid steel frame on which the various components of the device 1 according to the invention are mounted.
  • a roller-shaped milling tool 3 is provided, which is driven by a drive motor 20.
  • the milling tool 3 is mounted in an auxiliary frame 21 which also carries the motor 20.
  • drivers 26 are provided, which are guided in guides 25, which consist of two steel plates, which are fixedly mounted in the machine frame.
  • the drivers 26 are endless conveyor chains with sawtooth-like assemblies, which are arranged in the guides 25, i. rotatably mounted sprockets between their steel plates.
  • the plane in which the strands of the catches 26 which act as a support for the tree trunk 2 lie is oriented (FIG. 3) from the one long side of the device 1 so that it slopes downwards.
  • a chain tensioning device 27 is assigned to a chain wheel for each of the carriers 26.
  • supports 8 are provided, which also consist of two steel plates, between each of which a driver 28 rotates, which is designed like the driver 26.
  • the lateral supports 8 in the machine frame 10 by means of a pressure medium motor 29, which is supported in the machine frame 10 and which is coupled to the guides 8 via an arm 30, about a substantially horizontal axis 33 in the in Fig. 4 tilted position tilted.
  • the lateral supports 8 are connected to one another via profiled tubes 31 to form a stable component.
  • the drivers 26 and the drivers 28 are driven by a drive 6 so that a tree trunk 2 resting on or supported on them in the direction of arrow 32 (Fig. 3), i.e. is rotated substantially about its longitudinal axis.
  • a motor 36 is mounted in the machine frame 10, which drives a shaft 34 via a roller chain and chain wheels, on which the chain wheels for the drivers 26 and 28 are fastened.
  • the axis 33 of the shaft 34 is at the same time the axis about which the lateral supports 8 can be pivoted.
  • lever arms 4 are provided which can be pivoted about an axis 42 parallel to the longitudinal extension thereof and which are equipped with free-running rollers 40 and which, as shown in FIG. 4, with the aid of a pressure medium cylinder 41 from the ready position shown in solid lines to the one in FIG. 4 Active position shown in dashed lines can be swung in, in which they resiliently rest against the tree trunk 2 from above.
  • These lever arms 4 serve to measure the thickness of the tree trunk 2.
  • lifting arms 9 are also provided on a shaft 44.
  • the lifting arms 9 can be swung out to the left of FIG. 4 for ejecting a finished tree trunk 2 by a drive motor, not shown, into the position shown in broken lines in FIG. 4.
  • the envelope surface of the milling tool 3 is oriented in every position of the same in such a way that it essentially tangentially touches the plane formed by the drivers 26 from below.
  • the milling tool 3 and the motor 20 are by adjusting the subframe 21 from the position shown in solid lines in Fig. 1 (the axis of the milling tool 3 includes a larger, acute angle with the axis of the tree trunk 2) to reduce the root end of the tree trunk 2 in the position shown in dashed lines in Fig. 1 (the angle between the milling tool and the tree trunk is smaller) adjustable.
  • the subframe 21 has one end on a cross member 7 of the machine frame 10 pivotally mounted and with its other end slidably supported on a slide rail 50 mounted in the machine frame 10.
  • the slide rail 50 is aligned parallel to the support plane for the tree trunk 2 formed by the drivers 26.
  • the cross member 7 is also aligned parallel to the plane mentioned, which is defined by the drivers 26 (see FIG. 3).
  • the axis 55, about which the milling tool 3 can be pivoted, is perpendicular to the plane defined by the drivers 28.
  • a pressure medium motor 52 is provided for pivoting the milling tool 3 in the direction of the double arrow 51.
  • the pivot point (axis 55) of the auxiliary frame 21 on the cross member 7 of the machine frame 10 is adjustable, for which purpose a sliding block 54 is provided which engages in a slot 53 of the cross member 7 and to which the auxiliary frame 21 is pivotally connected.
  • the position of the pivot axis 55 is selected depending on the thickness of the tree trunk 2.
  • an arcuate control screen 57 is provided which can be pivoted about an axis 59.
  • the control panel 57 is coupled to the lever arms 4, so that they always assume a pivot position corresponding to the position of the lever arms 4 (these can also act as hold-down devices at a higher rotational speed of the tree trunk 2).
  • the control panel 27 can be coupled to the lever arms 4 via a push-pull rod.
  • a touch bar 58 connected to the sliding block 54 which is displaceably guided in a guide 60 mounted on the machine frame 10 and is adjusted by a pressure medium motor 56, an opening 60 is provided for the passage of the light beam of a light barrier arrangement.
  • the opening 60 is closed (or opened). Triggered by a sequential control, the pressure medium motor 56 moves the sliding block 54 and the key strip 58 until the opening 60 is no longer closed (or just opened) by the control panel.
  • the auxiliary frame 21 and thus the milling tool 3 pivots about the axis 55, after their position, as described, has been set by the hydraulic motor 56. In this way, the position of the milling tool 3 (in particular in the region of its pivot axis 55) is adapted to the diameter of the tree trunk 2 to be processed (in particular at the end of its root).
  • the auxiliary frame 21 actuated by the pressure medium motor 52 slides on the slide rail 50 without further (lateral) guidance.
  • the milling tool 3 is first of all adjusted by adjusting its front, i.e. of its end facing away from the motor 20 (adjusting the position of the pivot axis 55), with the aid of the pressure medium motor 56, i.e. by adjusting the sliding block 54 in the slot 53 according to the diameter of the trunk to be processed at its root end (younger point of the root end) as described.
  • the tree trunk 2 is rotated about its longitudinal axis by the drivers 26 and 28 and the milling tool 3 is gradually moved from the position shown in FIGS. 1 and 2 into the one shown in dashed lines in FIG. 1 by actuating the pressure medium cylinder 52 and pivoted position shown in Fig. 3.
  • the milling tool 3 (its axis) moves in a plane that is parallel to the support plane defined by the drivers 26 for the tree trunk 2, and the root end of the tree trunk 2 is increasingly reduced.
  • the milling tool 3 is so aligned in its starting position, during its movement (arrow 51) and finally also in its end position that its envelope surface lies in the support plane (defined by the drivers 26) and touches it essentially tangentially from below.
  • the lifting arms 9 are actuated (eject to the left in FIG. 3) or the side supports 8 are folded down (eject to the right in FIG. 3).
  • FIG. 1 In the drawing is an embodiment of the device according to the invention with three drivers 26 and three supports 8 shown. However, it is preferred, in particular when processing crooked woods, to provide only two drivers 26 and, accordingly, two supports 8.
  • some or only a pair of supports 8 and drivers 26 can be in the longitudinal direction of the device (i.e. approximately in the direction the axis of rotation of a tree trunk) to be adjustable so that they (or it) can be brought into the position most favorable for rotating the trunk about its longitudinal axis.
  • a device 1 for reducing the root end of tree trunks 2 has drivers 26 and 28 which are designed as endless chains and which support the tree trunk 2 from below and from the side and set in rotation about its longitudinal axis (arrow 32).
  • a cylindrical milling tool 3 is provided which can be pivoted in a plane parallel to the lower drivers 26.
  • the pivot axis 55 of the milling tool 3 can be adjusted depending on the thickness of the tree trunk 2.
  • the milling tool 3 is pivoted when reducing the root end from a standby position, in which it encloses a larger angle with the axis of rotation of the tree trunk 2, until the root end of the tree trunk 2 has assumed the conicity of the tree trunk 2 by milling off swellings present there.
  • the milling tool 3 pivots in a plane that is parallel to the plane defined by the lower drivers 26.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Milling, Drilling, And Turning Of Wood (AREA)
  • Organic Insulating Materials (AREA)
  • Pretreatment Of Seeds And Plants (AREA)

Abstract

An apparatus (1) for reducing the root end of tree trunks (2) has drivers (26 and 28) which are designed as endless chains and which support the tree trunk (2) from below and from the side and set it in rotation (arrow 32) about its longitudinal axis. To reduce the root end, a drum-shaped cutting tool (3) is provided which is pivotable in a plane parallel to the bottom drivers (26). The pivot axis (55) of the cutting tool (3) can be adjusted as a function of the thickness of the tree trunk (2). When the root end is being reduced, the tree trunk (2) does not move in its longitudinal direction but is only set in rotation (arrow 32) by the drivers (26 and 28). During the reducing of the root end, the cutting tool (3) is swung out of a ready position, in which it encloses a larger angle with the axis of rotation of the tree trunk (2), until the root end of the tree trunk (2) has assumed the conicity of the tree trunk (2) by cutting off swellings present there. In the process, the cutting tool (3) pivots in a plane which is parallel to the plane defined by the bottom drivers (26). <IMAGE>

Description

Die Erfindung betrifft eine Vorrichtung zum Reduzieren der Wurzelenden von Baumstämmen mit den Merkmalen des einleitenden Teils des unabhängigen Anspruches 1.The invention relates to a device for reducing the root ends of tree trunks with the features of the introductory part of independent claim 1.

Aus der EP-A-477 166 ist eine Vorrichtung zum Reduzieren der Wurzelenden von Baumstämmen bekannt, die mehrere schräg zum Baumstamm ausgerichtete Mitnehmer und seitliche Stützrollen besitzt, auf welchen der Baumstamm auf- bzw. anliegt. Durch Betätigen der schräggestellten Mitnehmer wird der Baumstamm nicht nur um seine Längsachse gedreht, sondern gleichzeitig auch in Längsrichtung bewegt, so daß er mit seinem Wurzelende gegen ein im Maschinengestell nicht verstellbar montiertes Fräswerkzeug, das die Form einer Fräswalze hat, geführt wird. Die Fräswalze ist zur Längsachse des Baumstammes schräggestellt und ist von unten nach oben zu den Mitnehmern ansteigend so ausgerichtet, daß seine Hüllfläche die von den Mitnehmern definierte Ebene von unten her im wesentlichen tangential berührt. Mit dieser bekannten Vorrichtung können Anschwellungen am Wurzelende von Baumstämmen entfernt werden. Wenn die Wurzelenden von Baumstämmen so reduziert werden, wird die konische Form des Baumstammes nicht verändert.From EP-A-477 166 a device for reducing the root ends of tree trunks is known which has several drivers which are oriented obliquely to the tree trunk and lateral support rollers on which the tree trunk rests. By operating the inclined driver, the tree trunk is not only rotated about its longitudinal axis, but at the same time also moved in the longitudinal direction, so that its root end is guided against a milling tool which is not adjustable in the machine frame and has the shape of a milling drum. The milling drum is inclined to the longitudinal axis of the tree trunk and is oriented so that it rises from the bottom to the top of the drivers so that its enveloping surface essentially tangentially touches the plane defined by the drivers from below. With this known device, swellings at the root end of tree trunks can be removed. If the root ends of tree trunks are reduced in this way, the conical shape of the tree trunk is not changed.

Eine andere Vorrichtung zum Bearbeiten von Baumstämmen ist aus der EP-B-112 365 (= WO 84/0127) bekannt. Bei dieser bekannten Vorrichtung wird der Baumstamm von einer Haltevorrichtung gehalten, die am Baumstamm von unten und von oben her angreift. Durch Drehen und Absenken des Baumstammes wird dieser auf eine im Maschinengestell der bekannten Vorrichtung fest angeordnete Fräseinrichtung mit einem Fräswerkzeug hin bewegt, so daß Anschwellungen am Wurzelende des Baumstammes abgefräst werden.Another device for processing tree trunks is known from EP-B-112 365 (= WO 84/0127). In this known device, the tree trunk is held by a holding device which engages the tree trunk from below and from above. By rotating and lowering the tree trunk, it is moved with a milling tool onto a milling device fixedly arranged in the machine frame of the known device, so that swellings are milled off at the root end of the tree trunk.

Eine andere Vorrichtung zum Bearbeiten der Wurzelenden von Baumstämmen ist aus der AT-PS 366 951 bekannt. Bei dieser bekannten Vorrichtung wird der Baumstamm ebenfalls von oben und von unten her gehalten und mit Hilfe der Haltevorrichtungen in Drehung um seine Längsachse versetzt. Das bei der Vorrichtung gemäß der AT-PS 366 951 vorgesehene Fräswerkzeug wird zum Bearbeiten des Wurzelendes aus einer unter dem Stamm befindlichen Ruhelage in eine am Stamm anliegende Wirklage bewegt.Another device for processing the root ends of tree trunks is known from AT-PS 366 951. At this known device, the tree trunk is also held from above and below and rotated with the aid of the holding devices about its longitudinal axis. The milling tool provided in the device according to AT-PS 366 951 is moved to work the root end from a rest position located under the trunk into an active position adjacent to the trunk.

Bei den aus den beiden zuletzt genannten Schriften bekannten Vorrichtungen wird im Gegensatz zu der aus der EP-A-477 166 bekannten Vorrichtung der Baumstamm von unten und von oben her gehalten und beim Bearbeiten, d.h. beim Reduzieren des Wurzelendes in seiner Längsrichtung nicht bewegt. Bei diesen bekannten Vorrichtungen rotiert das Fräswerkzeug in einer zur Längsachse des Baumstammes im wesentlichen parallelen Achse, so daß sich ein für das Bearbeiten ungünstiger Eingriffswinkel der Messer, mit welchen das Fräswerkzeug bestückt ist, nämlich ein Eingriff quer zu den Holzfasern, ergibt.In the devices known from the two last-mentioned documents, in contrast to the device known from EP-A-477 166, the tree trunk is held from below and from above and during processing, i.e. does not move in the longitudinal direction when reducing the root end. In these known devices, the milling tool rotates in an axis substantially parallel to the longitudinal axis of the tree trunk, so that there is an unfavorable pressure angle for the cutting of the knives with which the milling tool is equipped, namely an engagement transverse to the wood fibers.

Die aus der EP-A-477 166 bekannte Vorrichtung arbeitet an sich problemlos, es haben sich jedoch manchmal Schwierigkeiten ergeben, wenn ungleichmäßig gewachsene oder Aststummel aufweisende Baumstämme zu bearbeiten sind. Bei solchen Baumstämmen wird die von den angetriebenen, schräggestellten Mitnehmern bewirkte Längsbewegung des Baumstammes manchmal ungleichmäßig oder gestört.The device known from EP-A-477 166 works without any problems per se, but difficulties have sometimes arisen when tree trunks which have grown unevenly or have stumps are to be processed. With such tree trunks, the longitudinal movement of the tree trunk caused by the driven, inclined drivers is sometimes uneven or disturbed.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung der eingangs genannten Gattung anzugeben, mit der, falls gewünscht vollautomatisch, Anschwellungen am Wurzelende von Baumstämmen beliebigen Durchmessers entfernt werden können, ohne daß der Baumstamm, während er um seine Längsachse gedreht wird, in Längsrichtung bewegt werden muß und ohne, daß der aus der EP-A-477 166 bekannte günstige Eingriffswinkel des Fräswerkzeuges am Baumstamm vollständig aufgegeben wird.The invention has for its object to provide a device of the type mentioned, with which, if desired, fully automatically, swellings at the root end of tree trunks of any diameter can be removed without the tree trunk being moved in the longitudinal direction while being rotated about its longitudinal axis must and without that the favorable pressure angle of the milling tool on the tree trunk known from EP-A-477 166 is completely given up.

Erfindungsgemäß wird diese Aufgabe bei einer Vorrichtung der eingangs angegebenen Gattung gelöst, indem das Fräswerkzeug im Maschinengestell aus einer Bereitschaftsstellung, in der es mit der Drehachse des Baumstammes einen spitzen Winkel einschließt, unter Verkleinerung dieses Winkels verschwenkbar angeordnet ist, daß die oberste Erzeugende der Hüllfläche des Fräswerkzeuges in allen Stellungen des Fräswerkzeuges im wesentlichen in der von den Mitnehmern, die den Baumstamm von unten her abstützen und in Drehung versetzen, bestimmten Ebene angeordnet ist.According to the invention, this object is achieved in a device of the type specified at the outset by the milling tool in the machine frame from a standby position in which it forms an acute angle with the axis of rotation of the tree trunk, is arranged pivotably while reducing this angle, that the top generatrix of the envelope surface of the milling tool in all positions of the milling tool is arranged essentially in the plane determined by the drivers, which support the tree trunk from below and set it in rotation.

Bei der erfindungsgemäßen Vorrichtung wird der Baumstamm, wenn er beim Bearbeiten seines Wurzelendes gedreht wird, nicht mehr in Längsrichtung bewegt. Das Fräswerkzeug schwenkt während des Bearbeitens aus seiner Lage, in der seine Achse mit der Achse des Baumstammes einen größeren, spitzen Winkel einschließt, bis in seine Endstellung, in der die Achse des Fräswerkzeuges mit der Drehachse des Baumstammes einen kleineren, spitzen Winkel einschließt. Vorteilhaft ist dabei, daß das Fräswerkzeug während des Bearbeitungsvorganges bis in eine Endstellung bewegt werden kann, in der die an sich gegebene Konizität eines Baumstammes auch im Wurzelende beibehalten wird, also das Wurzelende nicht wie bei manchen bekannten Vorrichtungen zylinderförmig abgefräst wird.In the device according to the invention, the tree trunk is no longer moved in the longitudinal direction when it is rotated while processing its root end. During machining, the milling tool swivels out of its position in which its axis forms a larger, acute angle with the axis of the tree trunk, into its end position, in which the axis of the milling tool forms a smaller, acute angle with the axis of rotation of the tree trunk. It is advantageous here that the milling tool can be moved during the machining process into an end position in which the conicity of a tree trunk, which is inherent in itself, is also retained in the root end, that is to say the root end is not milled out in a cylindrical manner as in some known devices.

Vorteilhafte und bevorzugte Ausgestaltungen der erfindungsgemäßen Vorrichtung sind Gegenstand der Unteransprüche.Advantageous and preferred embodiments of the device according to the invention are the subject of the dependent claims.

Ein Vorteil der erfindungsgemäßen Vorrichtung besteht auch darin, daß die Mitnehmer, auf welchen der Baumstamm, während er bearbeitet wird, aufliegt, im Maschinengestell starr montiert sind, so daß sich deren Antrieb gegenüber dem Antrieb der verschwenkbaren Mitnehmer der EP-A-477 166 vereinfacht.An advantage of the device according to the invention is also that the drivers on which the tree trunk rests while it is being processed are rigidly mounted in the machine frame, so that their drive is simplified compared to the drive of the pivotable drivers of EP-A-477 166 .

Weitere Einzelheiten, Merkmale und Vorteile der erfindungsgemäßen Vorrichtung ergeben sich aus der nachstehenden Beschreibung des in der Zeichnung gezeigten Ausführungsbeispieles der Erfindung. Es zeigt:

  • Fig. 1 schematisch und in Draufsicht eine erfindungsgemäße Vorrichtung,
  • Fig. 2 die Vorrichtung in Seitenansicht,
  • Fig. 3 die Vorrichtung vom Fräswerkzeug aus gesehen und
  • Fig. 4 einen Vertikalschntit durch die Vorrichtung.
Further details, features and advantages of the device according to the invention result from the following description of the exemplary embodiment of the invention shown in the drawing. It shows:
  • 1 schematically and in plan view a device according to the invention,
  • 2 the device in side view,
  • Fig. 3 seen the device from the milling tool and
  • Fig. 4 shows a vertical section through the device.

Die Vorrichtung 1 besitzt ein Maschinengestell 10, das ein massiver Stahlrahmen ist, auf dem die verschiedenen Bestandteile der erfindungsgemäßen Vorrichtung 1 montiert sind.The device 1 has a machine frame 10, which is a solid steel frame on which the various components of the device 1 according to the invention are mounted.

An einem Ende des Maschinengestells 10 ist ein walzenförmiges Fräswerkzeug 3 vorgesehen, das von einem Antriebsmotor 20 angetrieben wird. Das Fräswerkzeug 3 ist in einem Hilfsrahmen 21 gelagert, der auch den Motor 20 trägt.At one end of the machine frame 10, a roller-shaped milling tool 3 is provided, which is driven by a drive motor 20. The milling tool 3 is mounted in an auxiliary frame 21 which also carries the motor 20.

Zum Abstützen des zu bearbeitenden Baumstammes 2 sind Mitnehmer 26 vorgesehen, die in Führungen 25, die aus jeweils zwei Stahlplatten bestehen, welche im Maschinengestell fix montiert sind, geführt sind. Die Mitnehmer 26 sind im gezeigten Ausführungsbeispiel endlose Förderketten mit sägezahnartigen Bestückungen, die um zwei in den Führungen 25, d.h. zwischen deren Stahlplatten verdrehbar gelagerte Kettenräder umlaufen. Die Ebene, in der die als Abstützung des Baumstammes 2 wirksamen Trume der Mitnehmer 26 liegen, ist (Fig. 3) von der einen Längsseite der Vorrichtung 1 schräg nach unten abfallend ausgerichtet.To support the tree trunk 2 to be processed, drivers 26 are provided, which are guided in guides 25, which consist of two steel plates, which are fixedly mounted in the machine frame. In the exemplary embodiment shown, the drivers 26 are endless conveyor chains with sawtooth-like assemblies, which are arranged in the guides 25, i. rotatably mounted sprockets between their steel plates. The plane in which the strands of the catches 26 which act as a support for the tree trunk 2 lie is oriented (FIG. 3) from the one long side of the device 1 so that it slopes downwards.

Jeweils einem Kettenrad für die Mitnehmer 26 ist eine Kettenspannvorrichtung 27 zugeordnet.A chain tensioning device 27 is assigned to a chain wheel for each of the carriers 26.

Zum seitlichen Abstützen des zu bearbeitenden Baumstammes 2 sind Abstützungen 8 vorgesehen, die ebenfalls aus je zwei Stahlplatten bestehen, zwischen welchen jeweils ein Mitnehmer 28 umläuft, der so wie die Mitnehmer 26 ausgebildet ist. Im Gegensatz zu den Führungen 25 sind die seitlichen Abstützungen 8 im Maschinengestell 10 mit Hilfe eines Druckmittelmotors 29, der im Maschinengestell 10 abgestützt ist, und der mit den Führungen 8 über einen Arm 30 gekuppelt ist, um eine im wesentlichen horizontale Achse 33 in die in Fig. 4 strichliert eingezeichnete Lage abkippbar. Um die Stabilität zu erhöhen, sind die seitlichen Abstützungen 8 über Profilrohre 31 miteinander zu einem stabilen Bauteil verbunden.For the lateral support of the tree trunk 2 to be processed, supports 8 are provided, which also consist of two steel plates, between each of which a driver 28 rotates, which is designed like the driver 26. In contrast to the guides 25, the lateral supports 8 in the machine frame 10 by means of a pressure medium motor 29, which is supported in the machine frame 10 and which is coupled to the guides 8 via an arm 30, about a substantially horizontal axis 33 in the in Fig. 4 tilted position tilted. In order to increase the stability, the lateral supports 8 are connected to one another via profiled tubes 31 to form a stable component.

Die Mitnehmer 26 und die Mitnehmer 28 werden von einem Antrieb 6 so angetrieben, daß ein auf ihnen aufliegender bzw. an ihnen abgestützter Baumstamm 2 in Richtung des Pfeiles 32 (Fig. 3), d.h. im wesentlichen um seine Längsachse gedreht wird. Zum Antrieb der Mitnehmer 26 und 28 ist im Maschinengestell 10 ein Motor 36 montiert, der über eine Rollenkette und Kettenräder eine Welle 34 antreibt, auf der die Kettenräder für die Mitnehmer 26 und 28 befestigt sind. Die Achse 33 der Welle 34 ist gleichzeitig die Achse, um welche die seitlichen Abstützungen 8 verschwenkbar sind.The drivers 26 and the drivers 28 are driven by a drive 6 so that a tree trunk 2 resting on or supported on them in the direction of arrow 32 (Fig. 3), i.e. is rotated substantially about its longitudinal axis. To drive the drivers 26 and 28, a motor 36 is mounted in the machine frame 10, which drives a shaft 34 via a roller chain and chain wheels, on which the chain wheels for the drivers 26 and 28 are fastened. The axis 33 of the shaft 34 is at the same time the axis about which the lateral supports 8 can be pivoted.

Im Maschinengestell 10 sind um eine zu dessen Längserstreckung parallele Achse 42 schwenkbare, mit frei laufenden Rollen 40 bestückte Hebelarme 4 vorgesehen, die wie in Fig. 4 gezeigt, mit Hilfe eines Druckmittelzylinders 41 aus der in durchgehenden Linien eingezeichneten Bereitschaftsstellung in die in Fig. 4 strichliert eingezeichnete Wirklage einschwenkbar sind, in der sie federnd am Baumstamm 2 von oben her anliegen. Diese Hebelarme 4 dienen zum Erfassen der Dicke des Baumstammes 2.In the machine frame 10, lever arms 4 are provided which can be pivoted about an axis 42 parallel to the longitudinal extension thereof and which are equipped with free-running rollers 40 and which, as shown in FIG. 4, with the aid of a pressure medium cylinder 41 from the ready position shown in solid lines to the one in FIG. 4 Active position shown in dashed lines can be swung in, in which they resiliently rest against the tree trunk 2 from above. These lever arms 4 serve to measure the thickness of the tree trunk 2.

Im Maschinengestell 10 sind weiters an einer Welle 44 befestigte Hebearme 9 vorgesehen. Die Hebearme 9 sind zum Auswerfen eines fertig bearbeiteten Baumstammes 2 durch einen nicht gezeigten Antriebsmotor nach links der Fig. 4 in die in Fig. 4 strichliert eingezeichnete Lage ausschwenkbar.In the machine frame 10, lifting arms 9 are also provided on a shaft 44. The lifting arms 9 can be swung out to the left of FIG. 4 for ejecting a finished tree trunk 2 by a drive motor, not shown, into the position shown in broken lines in FIG. 4.

Wie insbesondere Fig. 3 zeigt, ist die Hüllfläche des Fräswerkzeuges 3 in jeder Stellung desselben so ausgerichtet, daß sie die von den Mitnehmern 26 gebildete Ebene von unten her im wesentlichen tangential berührt.As shown in FIG. 3 in particular, the envelope surface of the milling tool 3 is oriented in every position of the same in such a way that it essentially tangentially touches the plane formed by the drivers 26 from below.

Das Fräswerkzeug 3 und der Motor 20 sind durch Verstellen des Hilfsrahmens 21 aus der in Fig. 1 in durchgehenden Linien eingezeichneten Stellung (die Achse des Fräswerkzeuges 3 schließt mit der Achse des Baumstammes 2 einen größeren, spitzen Winkel ein) zum Reduzieren des Wurzelendes des Baumstammes 2 in die in Fig. 1 in strichlierten Linien eingezeichnete Stellung (der Winkel zwischen dem Fräswerkzeug und dem Baumstamm ist kleiner) verstellbar. Hiezu ist der Hilfsrahmen 21 mit einem Ende an einem Querträger 7 des Maschinengestells 10 verschwenkbar gelagert und mit seinem anderen Ende auf einer im Maschinengestell 10 montierten Gleitschiene 50 verschiebbar abgestützt. Die Gleitschiene 50 ist parallel zur von den Mitnehmern 26 gebildeten Stützebene für den Baumstamm 2 ausgerichtet. Auch der Querträger 7 ist parallel zu der genannten Ebene, die von den Mitnehmern 26 definiert wird, ausgerichtet (siehe Fig. 3). Die Achse 55, um die das Fräswerkzeug 3 verschwenkbar ist, steht zu der von den Mitnehmern 28 definierten Ebene senkrecht.The milling tool 3 and the motor 20 are by adjusting the subframe 21 from the position shown in solid lines in Fig. 1 (the axis of the milling tool 3 includes a larger, acute angle with the axis of the tree trunk 2) to reduce the root end of the tree trunk 2 in the position shown in dashed lines in Fig. 1 (the angle between the milling tool and the tree trunk is smaller) adjustable. For this purpose, the subframe 21 has one end on a cross member 7 of the machine frame 10 pivotally mounted and with its other end slidably supported on a slide rail 50 mounted in the machine frame 10. The slide rail 50 is aligned parallel to the support plane for the tree trunk 2 formed by the drivers 26. The cross member 7 is also aligned parallel to the plane mentioned, which is defined by the drivers 26 (see FIG. 3). The axis 55, about which the milling tool 3 can be pivoted, is perpendicular to the plane defined by the drivers 28.

Zum Verschwenken des Fräswerkzeuges 3 in Richtung des Doppelpfeiles 51 ist ein in Fig. 1 schematisch angedeuteter Druckmittelmotor 52 vorgesehen.A pressure medium motor 52, indicated schematically in FIG. 1, is provided for pivoting the milling tool 3 in the direction of the double arrow 51.

Der Anlenkpunkt (Achse 55) des Hilfsrahmens 21 am Querträger 7 des Maschinengestells 10 ist verstellbar, wozu ein in einen Schlitz 53 des Querträgers 7 eingreifender Gleitstein 54 vorgesehen ist, mit dem der Hilfsrahmen 21 verschwenkbar verbunden ist.The pivot point (axis 55) of the auxiliary frame 21 on the cross member 7 of the machine frame 10 is adjustable, for which purpose a sliding block 54 is provided which engages in a slot 53 of the cross member 7 and to which the auxiliary frame 21 is pivotally connected.

Die Lage der Schwenkachse 55 wird in Abhängigkeit von der Dicke des Baumstammes 2 gewählt. Hiezu ist eine kreisbogenförmige Steuerblende 57 vorgesehen, die um eine Achse 59 verschwenkbar ist. Die Steuerblende 57 ist mit den Hebelarmen 4 gekuppelt, so daß sie stets eine der Lage der Hebelarme 4 (diese können bei höherer Drehgeschwindigkeit des Baumstammes 2 auch als Niederhalter wirken) entsprechende Schwenkstellung einnehmen. Die Steuerblende 27 kann mit den Hebelarmen 4 über eine Schub-Zug-Stange gekuppelt sein. Am freien Ende einer mit dem Gleitstein 54 verbundenen Tastleiste 58, die in einer am Maschinengestell 10 montierten Führung 60 verschiebbar geführt ist, und von einem Druckmittelmotor 56 verstellt wird, ist eine Öffnung 60 für den Durchtritt des Lichtstrahles einer Lichtschrankenanordnung vorgesehen. Verschwenkt die Steuerblende 57, so wird die Öffnung 60 verschlossen (oder geöffnet). Durch eine Folgesteuerung ausgelöst, bewegt der Druckmittelmotor 56 den Gleitstein 54 und die Tastleiste 58 solange, bis die Öffnung 60 von der Steuerblende gerade nicht mehr verschlossen (oder gerade freigegeben) wird. Der Hilfsrahmen 21 und damit das Fräswerkzeug 3 schwenkt um die Achse 55, nachdem deren Lage, wie beschrieben, durch den Druckmittelmotor 56 eingestellt worden ist. Auf diese Weist ist die Stellung des Fräswerkzeuges 3 (insbesondere im Bereich seiner Schwenkachse 55) dem Durchmesser des jeweils zu bearbeitenden Baumstammes 2 (insb. an dessen Wurzelende) angepaßt.The position of the pivot axis 55 is selected depending on the thickness of the tree trunk 2. For this purpose, an arcuate control screen 57 is provided which can be pivoted about an axis 59. The control panel 57 is coupled to the lever arms 4, so that they always assume a pivot position corresponding to the position of the lever arms 4 (these can also act as hold-down devices at a higher rotational speed of the tree trunk 2). The control panel 27 can be coupled to the lever arms 4 via a push-pull rod. At the free end of a touch bar 58 connected to the sliding block 54, which is displaceably guided in a guide 60 mounted on the machine frame 10 and is adjusted by a pressure medium motor 56, an opening 60 is provided for the passage of the light beam of a light barrier arrangement. If the control panel 57 pivots, the opening 60 is closed (or opened). Triggered by a sequential control, the pressure medium motor 56 moves the sliding block 54 and the key strip 58 until the opening 60 is no longer closed (or just opened) by the control panel. The auxiliary frame 21 and thus the milling tool 3 pivots about the axis 55, after their position, as described, has been set by the hydraulic motor 56. In this way, the position of the milling tool 3 (in particular in the region of its pivot axis 55) is adapted to the diameter of the tree trunk 2 to be processed (in particular at the end of its root).

Während des Verschwenkens des Fräswerkzeuges 3 gleitet der vom Druckmittelmotor 52 betätigte Hilfsrahmen 21 ohne weitere (seitliche) Führung auf der Gleitschiene 50.During the pivoting of the milling tool 3, the auxiliary frame 21 actuated by the pressure medium motor 52 slides on the slide rail 50 without further (lateral) guidance.

Zum Ausführen der Fräsarbeit wird das Fräswerkzeug 3 zunächst durch Verstellen seines vorderen, d.h. seines vom Motor 20 abgekehrten Endes (Einstellen der Lage der Schwenkachse 55), mit Hilfe des Druckmittelmotors 56, d.h. durch Verstellen des Gleitsteines 54 im Schlitz 53, entsprechend dem Durchmesser des zu bearbeitenden Stammes an seinem Wurzelende (jüngere Stelle des Wurzelendes) wie beschrieben ausgerichtet. Sobald dies geschehen ist, wird der Baumstamm 2 von den Mitnehmern 26 und 28 um seine Längsachse gedreht und das Fräswerkzeug 3 durch Betätigen des Druckmittelzylinders 52 nach und nach aus der in den Fig. 1 und 2 gezeigten Stellung in die in Fig. 1 strichliert eingezeichnete und in Fig. 3 gezeigte Stellung verschwenkt. Dabei bewegt sich das Fräswerkzeug 3 (dessen Achse) in einer Ebene, die zu der von den Mitnehmern 26 definierten Stützebene für den Baumstamm 2 parallel ist, und das Wurzelende des Baumstammes 2 wird zunehmend reduziert. Das Fräswerkzeug 3 ist also in seiner Ausgangsstellung, während seiner Bewegung (Pfeil 51) und schließlich auch in seiner Endstellung so ausgerichtet, daß seine Hüllfläche in der Stützebene (definiert von den Mitnehmern 26) liegt und diese von unten her im wesentlichen tangential berührt.To carry out the milling work, the milling tool 3 is first of all adjusted by adjusting its front, i.e. of its end facing away from the motor 20 (adjusting the position of the pivot axis 55), with the aid of the pressure medium motor 56, i.e. by adjusting the sliding block 54 in the slot 53 according to the diameter of the trunk to be processed at its root end (younger point of the root end) as described. As soon as this has happened, the tree trunk 2 is rotated about its longitudinal axis by the drivers 26 and 28 and the milling tool 3 is gradually moved from the position shown in FIGS. 1 and 2 into the one shown in dashed lines in FIG. 1 by actuating the pressure medium cylinder 52 and pivoted position shown in Fig. 3. The milling tool 3 (its axis) moves in a plane that is parallel to the support plane defined by the drivers 26 for the tree trunk 2, and the root end of the tree trunk 2 is increasingly reduced. The milling tool 3 is so aligned in its starting position, during its movement (arrow 51) and finally also in its end position that its envelope surface lies in the support plane (defined by the drivers 26) and touches it essentially tangentially from below.

Zum Ausheben eines Baumstammes 2 nach dessen Bearbeitung werden entweder (nach dem Wegschwenken der Hebelarme 4) die Hebearme 9 betätigt (Auswerfen nach links der Fig. 3) oder die seitlichen Abstützungen 8 abgeklappt (Auswerfen nach rechts der Fig. 3).To lift a tree trunk 2 after its processing, either (after swiveling away the lever arms 4) the lifting arms 9 are actuated (eject to the left in FIG. 3) or the side supports 8 are folded down (eject to the right in FIG. 3).

In der Zeichnung ist eine Ausführungsform der erfindungsgemäßen Vorrichtung mit drei Mitnehmern 26 und drei Abstützungen 8 gezeigt. Es ist aber insbesondere bei dem Bearbeiten von krummen Hölzern bevorzugt, nur zwei Mitnehmer 26 und dementsprechend zwei Abstützungen 8 vorzusehen. Bei der Ausführungsform mit zwei Abstützungen 8 und zwei Mitnehmern 26 ebenso wie bei der in der Zeichnung gezeigten Ausführungsform mit drei Abstützungen 8 und Mitnehmern 26 können alle, einige oder nur ein Paar aus Abstützung 8 und Mitnehmer 26 in Längsrichtung der Vorrichtung (also etwa in Richtung der Drehachse eines Baumstammes) verstellbar sein, damit sie (bzw. es) in die für das Drehen des Stammes um seine Längsachse günstigste Stellung gebracht werden können.In the drawing is an embodiment of the device according to the invention with three drivers 26 and three supports 8 shown. However, it is preferred, in particular when processing crooked woods, to provide only two drivers 26 and, accordingly, two supports 8. In the embodiment with two supports 8 and two drivers 26 as well as in the embodiment shown in the drawing with three supports 8 and drivers 26, all, some or only a pair of supports 8 and drivers 26 can be in the longitudinal direction of the device (i.e. approximately in the direction the axis of rotation of a tree trunk) to be adjustable so that they (or it) can be brought into the position most favorable for rotating the trunk about its longitudinal axis.

Zusammenfassend kann die Erfindung beispielsweise wie folgt dargstellt werden:
Eine Vorrichtung 1 zum Reduzieren des Wurzelendes von Baumstämmen 2 besitzt Mitnehmer 26 und 28, die als Endlosketten ausgeführt sind und die den Baumstamm 2 von unten her und von der Seite her abstützen und um seine Längsachse in Drehung versetzen (Pfeil 32). Zum Reduzieren des Wurzelendes ist ein walzenförmiges Fräswerkzeug 3 vorgesehen, das in einer zu den unteren Mitnehmern 26 parallelen Ebene verschwenkbar ist. Die Schwenkachse 55 des Fräswerkzeuges 3 kann in Abhängigkeit von der Dicke des Baumstammes 2 verstellt werden. Beim Reduzieren des Wurzelendes bewegt sich der Baumstamm 2 in seiner Längsrichtung nicht, sondern wird von den Mitnehmern 26 und 28 nur in Drehung (Pfeil 32) versetzt. Das Fräswerkzeug 3 wird beim Reduzieren des Wurzelendes aus einer Bereitschaftslage, in der es mit der Drehachse des Baumstammes 2 einen größeren Winkel einschließt, verschwenkt, bis das Wurzelende des Baumstammes 2 durch Abfräsen von dort vorhandenen Anschwellungen die Konizität des Baumstammes 2 angenommen hat. Dabei schwenkt das Fräswerkzeug 3 in einer Ebene, die zur von den unteren Mitnehmern 26 definierten Ebene parallel ist.In summary, the invention can be represented as follows, for example:
A device 1 for reducing the root end of tree trunks 2 has drivers 26 and 28 which are designed as endless chains and which support the tree trunk 2 from below and from the side and set in rotation about its longitudinal axis (arrow 32). To reduce the end of the root, a cylindrical milling tool 3 is provided which can be pivoted in a plane parallel to the lower drivers 26. The pivot axis 55 of the milling tool 3 can be adjusted depending on the thickness of the tree trunk 2. When the root end is reduced, the tree trunk 2 does not move in its longitudinal direction, but is only set in rotation by the drivers 26 and 28 (arrow 32). The milling tool 3 is pivoted when reducing the root end from a standby position, in which it encloses a larger angle with the axis of rotation of the tree trunk 2, until the root end of the tree trunk 2 has assumed the conicity of the tree trunk 2 by milling off swellings present there. The milling tool 3 pivots in a plane that is parallel to the plane defined by the lower drivers 26.

Claims (13)

  1. Apparatus for reducing root swellings on tree trunks (2) with a means (8, 25, 26, 28) for supporting and turning the tree trunk (2) and with a rotating roller-type cutting tool (3), which may be placed against the root end of the tree trunk (2), wherein the means (8, 25) for supporting the tree trunk has continuously circulating drivers (26, 28) preferably in the form of toothed conveyor chains, characterised in that the cutting tool (3) is mounted to pivot in the machine frame (10) out of a ready position, in which it encloses an acute angle with the rotational axis of the tree trunk (2), by reducing this angle; and that in all positions of the cutting tool (3), the uppermost generatrix of the enveloping surface of the cutting tool (3) is essentially disposed in the plane determined by the drivers (26) which support the tree trunk (2) from below and set it in rotation.
  2. Apparatus according to Claim 1, characterised in that the cutting tool (3) is mounted together with its drive motor (20) on a sub-frame (21), which lies on a slide rail (50) in the area of the motor (20) and at the end averted from the motor (20) is mounted to pivot in the machine frame (10) around a preferably displaceable axis (55).
  3. Apparatus according to Claim 2, characterised in that the slide rail (50) is mounted in the machine frame (10) parallel to the plane determined by the drivers (26); and that the axis (55), around which the sub-frame (21) and thus the cutting tool (3) may be pivoted, is aligned perpendicular to said plane.
  4. Apparatus according to one of Claims 1 to 3, characterised in that in the area of its pivot axis (55), the sub-frame (21) is pivotally fastened to a slide ring (54), which is in turn displaceably disposed on a cross-member (7) aligned parallel to the plane defined by the drivers (26).
  5. Apparatus according to Claim 4, characterised in that the slide ring (54) may be displaced by a pressure medium motor (56), preferably with a contact finger (58) arranged between them, onto a control part (57), which may be displaced, in particular pivoted, depending on the diameter of the tree trunk (2).
  6. Apparatus according to one of Claims 1 to 5, characterised in that drivers (28) guided between the guide plates (8) are provided as lateral support for the tree trunk (2) to be processed, said drivers (28) essentially being at right angles to drivers (26) when in their active position.
  7. Apparatus according to Claim 5 or 6, characterised in that the control part (57), to which the contact finger (58) connected to the slide ring (54) is allocated, is coupled to at least one lever arm (4), which may be pivoted in the machine frame (10) around an axis parallel to the axis of the tree trunk (2) and may be laid against the tree trunk (2), in particular from above.
  8. Apparatus according to Claim 7, characterised in that several freely rotatable rollers (40) are provided on the lever arm (4).
  9. Apparatus according to one of Claims 1 to 8, characterised in that the drivers (26) supporting the tree trunk (2) from below and the drivers (26) supporting the tree trunk (2) laterally are driven by a common drive (6, 34, 36).
  10. Apparatus according to Claim 9, characterised in that for actuation of the drivers (26 and 28), a drive motor (36) is provided which drives a shaft (34), on which the chain wheels are mounted, in order to rotate the drivers (26 and 28 respectively).
  11. Apparatus according to one of Claims 1 to 10, characterised in that the drivers (28) supporting the tree trunk (2) laterally are disposed in the area of the end of the drivers (26) located at a lower level.
  12. Apparatus according to one of Claims 6 to 11, characterised in that the guide plates (8) for the drivers (28) supporting the tree trunk (2) laterally are connected via profile tubes (31) to a frame, which may be swivelled by means of a common drive (29, 30) around an axis (34) aligned parallel to the axis of the tree trunk (2) out of their position essentially perpendicular to the plane defined by the drivers (26) into a position in which the drivers (28) are disposed in essentially the same plane as drivers (26).
  13. Apparatus according to one of Claims 1 to 12, characterised in that at least two drivers (26) supporting the tree trunk from below and at least two drivers (28) supporting the tree trunk laterally are provided; and that at least one of drivers (26) and at least one of drivers (28) may be displaced in the machine frame (10) in the direction of the axis of the tree trunk.
EP93890081A 1992-05-06 1993-04-20 Apparatus for reducing root swellings on tree trunks Expired - Lifetime EP0569345B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT923/92 1992-05-06
AT0092392A AT397225B (en) 1992-05-06 1992-05-06 DEVICE FOR REDUCING THE ROOTING OF TREE TRUNKS

Publications (2)

Publication Number Publication Date
EP0569345A1 EP0569345A1 (en) 1993-11-10
EP0569345B1 true EP0569345B1 (en) 1995-09-06

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Application Number Title Priority Date Filing Date
EP93890081A Expired - Lifetime EP0569345B1 (en) 1992-05-06 1993-04-20 Apparatus for reducing root swellings on tree trunks

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EP (1) EP0569345B1 (en)
AT (2) AT397225B (en)
DE (1) DE59300553D1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE513907C2 (en) * 1997-05-05 2000-11-27 Bruks Mekaniska Ab Machine for root reduction of logs
AT406843B (en) * 1999-04-07 2000-09-25 Johann Wolf DEVICE FOR TREATING TRUNKS
DE102007001991A1 (en) * 2007-01-08 2008-07-10 Baljer & Zembrod Gmbh & Co. Kg Device for removing or reducing rooting in tree trunks
CN116276094B (en) * 2023-04-24 2023-11-21 广东润星科技有限公司 Gantry type turning, boring and milling composite flexible machining unit

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE222972C (en) *
SE363755B (en) * 1972-06-14 1974-02-04 Brundell & Jonsson Ab
SE427635B (en) * 1977-11-04 1983-04-25 Bruks Mekaniska Ab MACHINERY FOR MATERIAL WORKING PROCESSING OF BUSINESS WORK LONG TURNING WORK
FI69979C (en) * 1981-09-30 1986-09-12 Valon Kone Oy FOERFARANDE OCH MASKIN FOER FRAESNING AV ROTAENDAN AV EN FOER SAOGNING AVSEDD STOCK
DE3333910A1 (en) * 1983-09-20 1985-04-04 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach Apparatus for cutting off root swellings on round timber
DE3306569A1 (en) * 1983-02-25 1984-09-06 Hombak Maschinenfabrik Gmbh & Co Kg, 6550 Bad Kreuznach Method and apparatus for cutting off root swellings on round wood
AT396669B (en) * 1990-09-18 1993-11-25 Stingl Max DEVICE FOR REDUCING ROOTS OF TREE TRUNKS

Also Published As

Publication number Publication date
DE59300553D1 (en) 1995-10-12
ATA92392A (en) 1993-07-15
ATE127381T1 (en) 1995-09-15
EP0569345A1 (en) 1993-11-10
AT397225B (en) 1994-02-25

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