EP1046480B1 - Device for cutting up logs using a quarter-cut and associated sawing station - Google Patents

Device for cutting up logs using a quarter-cut and associated sawing station Download PDF

Info

Publication number
EP1046480B1
EP1046480B1 EP00108393A EP00108393A EP1046480B1 EP 1046480 B1 EP1046480 B1 EP 1046480B1 EP 00108393 A EP00108393 A EP 00108393A EP 00108393 A EP00108393 A EP 00108393A EP 1046480 B1 EP1046480 B1 EP 1046480B1
Authority
EP
European Patent Office
Prior art keywords
log
saw
station
circular
sawing station
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP00108393A
Other languages
German (de)
French (fr)
Other versions
EP1046480A3 (en
EP1046480A2 (en
Inventor
Edeltraud Schwaiger
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.)
Esterer WD GmbH and Co
Original Assignee
Esterer WD GmbH and Co
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
Priority claimed from DE19927742A external-priority patent/DE19927742C1/en
Application filed by Esterer WD GmbH and Co filed Critical Esterer WD GmbH and Co
Publication of EP1046480A2 publication Critical patent/EP1046480A2/en
Publication of EP1046480A3 publication Critical patent/EP1046480A3/en
Application granted granted Critical
Publication of EP1046480B1 publication Critical patent/EP1046480B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B7/00—Sawing machines working with circular saw blades, specially designed for length sawing of trunks
    • B27B7/04—Sawing machines working with circular saw blades, specially designed for length sawing of trunks by making use of a plurality of circular saws mounted on a single spindle; Arrangements for adjusting the mutual distances
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B1/00—Methods for subdividing trunks or logs essentially involving sawing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B7/00—Sawing machines working with circular saw blades, specially designed for length sawing of trunks
    • B27B7/02—Sawing machines working with circular saw blades, specially designed for length sawing of trunks by making use of circular saws mounted substantially at right angles, e.g. vertically and horizontally

Definitions

  • the invention relates to a device for cutting logs or Tree trunk parts in one cut with several non-parallel cutting planes, in particular in a quarter cut, and a sawing station for use in such a device.
  • a pattern that is particularly advantageous with regard to the location of the annual rings is the So-called neighborhood section, the sectional view of which is shown in FIG. 1.
  • the tree trunk is first quartered and then cut by the alternately cut planks on both straight surfaces of the Baumstarnmviertel.
  • the Numbers on the respective cutting lines in FIG. 1 indicate the sequence of the cuts.
  • WO-A-96/01174 describes a sawing station for separating planks from a tree trunk known, wherein several circular saws are provided for the sawing station. Two circular saws are spaced apart and each include a saw blade, which Saw blades lie in a common horizontal cutting plane. Two more circular saws each have several coaxially arranged saw blades, the cutting planes of which are perpendicular to horizontal cutting plane of the first-mentioned circular saw.
  • FR-A-2,696,122 discloses a sawing station with two saws, each of which cuts a screed and are arranged offset in the conveying direction of the tree trunk.
  • the cutting planes the saws can be arranged at a 90 ° angle to one another.
  • a sawing station and a corresponding device for Disassembly of logs to provide a neighborhood cut and allow related patterns to be carried out more efficiently.
  • This object is achieved according to the invention by a sawing station according to claim 1 or a device for disassembling Tree trunks or tree trunk parts solved according to claim 13.
  • Advantageous embodiments are specified in the subclaims.
  • the invention proposes for the first time in a sawing station
  • a sawing station Use circular saws whose cutting planes, i.e. the planes of the saw blades, are one do not include a vanishing angle, namely an angle of 90 °, which is a quarter cut allows.
  • the circular saws are arranged so that those in the tree trunk Connect the cut surfaces generated so that the tree trunk in the sawing station can be edited simultaneously on two adjacent sides and at one pass through the sawing station result in at least two planks, which are of different sizes Sides of the tree trunk have been severed.
  • the circular saws are in quick succession arranged so that on the one hand both saws work the tree trunk part at the same time can and on the other hand the saw blades of the two circular saws have a sufficient safety distance have so that they do not come into contact with each other.
  • the two circular saws are each equipped with a plurality of saw blades, so that tree quarters with a smaller width in a single saw cut in the quarter cut can be disassembled.
  • the saw blades advantageously have a different one Diameter, which corresponds to the decreasing plank width for the quarter cut (referring to FIG. 1 are, for example, the planks produced with the cuts 1 to 4 are much wider than those cuts that are created with the cuts 14 to 19 become).
  • they are preferably concentric with one another and corresponding to those provided Screed thickness spaced several saw blades arranged, the diameter of which in the direction away from a stop for the tree part decreases.
  • a hollow shaft arrangement is preferred in which at least some of the saw blades is arranged on hollow shafts that receive another shaft in their interior.
  • the various shafts are advantageously displaceable relative to one another, so that the distance between the saw blades and thus also the cutting thickness can be changed.
  • Separate Saw blades can be exchangeable to allow different cutting thicknesses.
  • one or more hollow shafts in a hollow shaft receiving them is limited in a plane perpendicular to the shaft axis are displaceable by the distance of the edges of the saw blades in the plane perpendicular to To be able to adapt the shaft axis to a changed screed thickness in a quarter cut.
  • each shaft that can be moved transversely to the axial direction has its own relocatable shaft Has drive or, which is preferred, via a transmission with a common drive connected, which allows the shafts to be displaced perpendicular to the axial direction, for example a worm gear, a gear with a telescopic rod or a variable-length converter cylinder or the like.
  • a movable stop can be provided.
  • the shaft arrangement a circular saw altogether out of and into the machining area can be shifted in a controlled manner so that by pushing in or pulling out the Shaft arrangement the number of saw blades, which protrudes into the machining area, varies can be. This makes it possible to easily connect the saw station to different ones Adjust part thicknesses that require a different number of cuts.
  • the saw station according to the invention can, on the one hand, be used advantageously in a Find the sawing street where the sawing station is in the conveying direction after further sawing stations is arranged, which cut planks on the two sides to be processed. You can one or more other sawing stations as described above. According to the invention, however, a saw station as described above is also provided after a row of the tree trunk or the tree trunk part only on one side Arrange processing saw stations that the tree trunk or the tree trunk part Work on different pages one after the other, preferably alternately. in principle is also conceivable, the saw station according to the invention in the forward and return in one Planing technique "as described above, i.e. the log or that Tree trunk part is driven through the sawing station and then in the opposite direction moved back again. Because of the - advantageously mutually perpendicular - The arrangement of the circular saws eliminates the time-consuming turning after each sawing operation.
  • the sawmill according to the embodiment shown in FIG. 2 is a sawmill for Disassembling a tree trunk in a quarter cut and has a log task 1, one Trunk reducer 3, a debarker 5, a turning device 7, a first log band saw 13, a second block band saw 21 and a sawing road 29.
  • the log load 1, the trunk reducer 3 and the debarker 5 are conventional Wise designed.
  • the logs are lifted with a gantry crane or abandoned directly from a truck and conveyed to the trunk reducer 3, which is strong woody, i.e. strongly conical trunks reduced to a size to be processed. After that the possibly reduced tree trunk is debarked in debarker 5.
  • the tree trunk is then guided to a turning device 7. There is the trunk qualitatively assessed and rotated so that zones of poor or good wood quality are possible exclusively in one of the four quadrants formed by the vertical and horizontal lie.
  • the tree trunk After the tree trunk is aligned accordingly, it is placed over a suitable one Conveyor (not shown) to the vertical band saw 13, which the Tree trunk through a vertical cut essentially through the center in two Split stem halves.
  • the two halves of the trunk are now a longitudinal conveyor 17 to a cross conveyor 19 promoted, which separated the two trunk halves and a second vertical log band saw 21 feeds, while the trunk halves are oriented so that the Cut area of the previous cut is parallel to the horizontal.
  • the block band saw 21 divides now by another vertical cut each of the two halves of the trunk in two Trunk area.
  • the strge pieces 29 consists of a central conveyor lane 31, on the sides of which are arranged alternating band saws TA 1 , TA 2 and TB 1 , TB 2 .
  • the band saws TA 1 , TA 2 and TB 1 , TB 2 each separate a screed from a supplied log section, whereby the log quarter is tipped between the sawing stations, so that the band saws TA 1 and TA 2 on the one hand and the band saw TB 1 and TB 2 on the other hand work the tree trunk quarter alternately on the two straight sides.
  • the band saws are followed in the conveying direction by a circular saw station 33, the structure of which is shown schematically in FIGS. 3 and 4.
  • the circular saw station 33 consists of two identical circular saws K 1 and K 2 with mutually perpendicular cutting planes, each circular saw K 1 and K 2 having a plurality of saw blades, four in the case of the present exemplary embodiment, which are arranged in a hollow shaft arrangement with shafts arranged one inside the other , which in the case of the circular saw K 1 are designated 35 1 , 35 2 , 35 3 and 35 4 (cf. FIG. 4).
  • the diameter of the saw blades decreases towards the free end of the saws according to the pattern of the quarter cut.
  • Hollow shaft circular saws for a cut with parallel cutting planes are generally known.
  • the saws K 1 and K 2 are therefore not described in detail.
  • the saw blades themselves are not shown, but only the respective cutting lines S1, S2, S3, S4 or S5, S6, S7 and S8.
  • the circular saws K 1 and K 2 are slightly spaced apart from one another in the conveying direction, so that the saw blades do not come into contact with one another.
  • the diameters of the individual saw blades are selected so that the saw lines S1, S2, S3 and S4 can extend essentially up to the corresponding saw lines S5, S6, S7 and S8 according to the pattern of the quarter cut.
  • the circular saws K 1 and K 2 each interact with a displaceable stop (not shown), the stop line A1 or A2 of which is indicated in FIG.
  • the shafts 35 2 and 35 3 are axially displaceable relative to one another and with respect to the shaft 35 1 , while the shaft 35 4 is rigid with respect to the shaft 35 3 . Accordingly, the distance between the cutting lines S1 and S2 or S2 and S3 can be varied and thus set to a desired cutting thickness.
  • the distance of the cutting line S 1 from the stop line A1 can be varied by adjusting the stop (not shown) assigned to the circular saw K 1 . The same applies to the distance between A2 and S5 with saw K 2 .
  • the (variable) thickness of the first screed defined by the distance between S1 and A1
  • the thickness of the second and third screed can vary between 30 and 50 mm between S1 and S2 or S2 and S3
  • the (Fixed) thickness of the fourth screed between S3 and S4 is approximately 30 mm.
  • this information like the selection of the displaceable shafts described above, is only exemplary.
  • all shafts or other shaft combinations can be variably axially displaceable relative to one another.
  • the circular saws K 1 and K 2 can be displaced overall in the respective axial direction R 1 or R 2 and can be wholly or partially moved out of the processing area, for example in such a way that only cuts along the lines S2 to S4 or S6 to S8 be carried out while the saw blades, which are intended for the cuts along the lines S1 and S5, lie outside the processing area. In this way, the number of cuts can be varied and the saw station can be set to different log diameters. It is preferably provided that the saws K 1 and K 2 can both be displaced in the directions R 1 and R 2 , that is to say both in the axial direction and perpendicularly thereto, in order to match the two saws with respect to the thickness of the screed.
  • the hollow shafts 35 2 to 35 4 can also be displaced from the concentric arrangement shown in FIGS. 3 and 4 into an eccentric position, so that in the event of an axial displacement of one of the hollow shafts of the saw K 1 in the direction R 1 , the a displacement of the crossing point of one or more of the cutting lines S1 to S4 with one of the cutting lines S5 to S8 causes the corresponding hollow shafts of the saw K 2 to be displaced relative to one another, likewise in the direction R 1 , into a position eccentric with respect to an outer hollow shaft, so that the sectional view shown in Fig. 3 is retained overall.
  • the shaft 35 2 can be axially displaced and the shaft, which defines the section line S6, can be displaced in the direction R 1 , perpendicular to its axial direction, into an eccentric position.
  • the third section thickness (S2 / S3) can be changed while maintaining the section of FIG. 3 by an axial displacement of the shaft 35 3 and a displacement of the corresponding shaft of the saw K 2 in the direction R 1 .
  • both circular saws K 1 and K 2 will be moved in the direction perpendicular to their axial direction (R 2 or R 1 ) or shift individual shafts in the corresponding direction to an eccentric position.
  • the saws K 1 and K 2 can also be moved in the direction R 1 or R 2 (or in both directions simultaneously) to change the thickness of a first screed.
  • planks are cut off in the band sawing stations TA 1 , TA 2 or TB 1 and TB 2 in accordance with the neighborhood cut.
  • the band sawing stations TA 1 , TA 2 or TB 1 and TB 2 are cut off in the band sawing stations TA 1 , TA 2 or TB 1 and TB 2 in accordance with the neighborhood cut.
  • the remaining wedge that remains after processing by these stations is then completely broken down by the circular saw station 33 in accordance with the neighborhood cut.
  • FIG. 5 shows a second embodiment of a tree cutting device according to the invention, in which the band saw stations TA 1 , TA 2 and TB 1 and TB 2 have been omitted and only a single circular saw station 33 is provided as described above.
  • the circular saw station 33 then disassembles the supplied tree quarter in a single operation in this execution form.
  • This embodiment is particularly suitable for logs with a smaller diameter.
  • the sawing station 33 can be set up in such a way that it works in the forward and return directions, so that the remaining wedge which remains in the sawing station 33 after a first machining operation is fed back to the sawing station 33 in the opposite direction, where it is further dismantled , and so on until the entire tree trunk quarter is disassembled.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sawing (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Harvester Elements (AREA)

Abstract

The separation device uses at least 2 circular saws (K1,K2) for sawing planks from the tree trunk in relatively angled plane e.g. at 90 degrees to one another, at least one of the circular saws provided with a number of saw blades, for simultaneous separation of a number of parallel planks. An Independent claim for a tree trunk separation method is also included.

Description

Die Erfindung betrifft eine Vorrichtung zum Zerlegen von Baumstämmen oder Baumstammteilen in einem Schnitt mit mehreren nicht parallelen Schnittebenen, insbesondere in einem Quartierschnitt, und eine Sägestation zum Einsatz in einer solchen Vorrichtung.The invention relates to a device for cutting logs or Tree trunk parts in one cut with several non-parallel cutting planes, in particular in a quarter cut, and a sawing station for use in such a device.

Massenschnittware wird in Sägewerken meistens mit einem Einfachschnitt oder Rundschnitt hergestellt, der allerdings den Nachteil hat, daß in einer vereinzelten Bohle die Lage der Jahresringe bezüglich der Grundfläche der Bohle und damit die Stabilität der Bohle variiert. Stehen beispielsweise die Jahresringe im wesentlichen zu der Bohlengrundfläche senkrecht, ist die Stabilität deutlich höher, als wenn die Jahresringe zu der Bohlengrundfläche im wesentlichen parallel sind.Bulk cut goods are mostly made in sawmills with a single cut or a round cut manufactured, which has the disadvantage, however, that the position of the Annual rings with respect to the base of the screed and thus the stability of the screed varies. For example, if the annual rings are essentially perpendicular to the screed base, the stability is significantly higher than if the annual rings to the plank base in are essentially parallel.

Ein Schnittmuster, das hinsichtlich der Lage der Jahresringe besonders vorteilhaft ist, ist der sogenannte Quartierschnitt, dessen Schnittbild in Fig. 1 dargestellt ist. Bei dem Quartierschnitt wird der Baumstamm zunächst geviertelt und anschließend werden von den beiden geraden Flächen des Baumstarnmviertels abwechselnd Bohlen abgeschnitten. Die Zahlen an den jeweiligen Schnittlinien in der Fig. 1 geben die Reihenfolge der Schnitte an.A pattern that is particularly advantageous with regard to the location of the annual rings is the So-called neighborhood section, the sectional view of which is shown in FIG. 1. In which The tree trunk is first quartered and then cut by the alternately cut planks on both straight surfaces of the Baumstarnmviertel. The Numbers on the respective cutting lines in FIG. 1 indicate the sequence of the cuts.

Der Quartierschnitt wurde bislang nur in der Art praktiziert, daß ein Baumstammviertel mehrfach durch ein und dieselbe Säge, in der Regel eine Bandsäge, gefahren wurde, wobei bei jedem Durchgang eine Bohle abgetrennt wurde und zwischen den einzelnen Durchgängen der Baumstamm um 90° gedreht wurde. Dieses Verfahren ist relativ aufwendig und gestattet nur einen begrenzten Durchsatz. So far, the quarter cut has only been practiced in the way that a tree trunk quarter has been driven several times by one and the same saw, usually a band saw, whereby a screed was cut off with each pass and between the individual passes the tree trunk was rotated 90 °. This process is relatively complex and permitted limited throughput.

Es ist weiterhin auch bekannt, in einer Sägestation mehrere Kreissägen mit parallelen Schnittebenen zu verwenden, entweder in der Form von zwei (nicht) aufeinanderfolgenden Kreissägen oder in der Form, daß mehrere Kreissägeblätter auf einer gemeinsamen Welle oder Hohlwelle montiert wurden. Gleichzeitige Schnitte in verschiedenen Ebenen wurden dagegen nicht praktiziert.It is also known to use several circular saws with parallel cutting planes in a sawing station to be used, either in the form of two (not) consecutive circular saws or in the form that several circular saw blades on a common shaft or Hollow shaft were installed. Simultaneous cuts in different levels were opposed not practiced.

Aus der WO-A-96/01174 ist eine Sägestation zum Abtrennen von Bohlen aus einem Baumstamm bekannt, wobei für die Sägestation mehrere Kreissägen vorgesehen sind. Zwei Kreissägen sind im Abstand nebeneinander angeordnet und umfassen jeweils ein Sägeblatt, welche Sägeblätter in einer gemeinsamen horizontalen Schnittebene liegen. Zwei weitere Kreissägen haben jeweils mehrere koaxial angeordnete Sägeblätter, deren Schnittebenen senkrecht zur horizontalen Schnittebene der erstgenannten Kreissäge liegen.WO-A-96/01174 describes a sawing station for separating planks from a tree trunk known, wherein several circular saws are provided for the sawing station. Two circular saws are spaced apart and each include a saw blade, which Saw blades lie in a common horizontal cutting plane. Two more circular saws each have several coaxially arranged saw blades, the cutting planes of which are perpendicular to horizontal cutting plane of the first-mentioned circular saw.

Die FR-A-2,696,122 offenbart eine Sägestation mit zwei Sägen, die jeweils eine Bohle abtrennen und in Förderrichtung des Baumstammes versetzt angeordnet sind. Die Schnittebenen der Sägen können in einem 90°-Winkel zueinander angeordnet sein.FR-A-2,696,122 discloses a sawing station with two saws, each of which cuts a screed and are arranged offset in the conveying direction of the tree trunk. The cutting planes the saws can be arranged at a 90 ° angle to one another.

Es ist die Aufgabe der Erfindung, eine Sägestation und eine entsprechende Vorrichtung zum Zerlegen von Baumstämmen zur Verfügung zu stellen, mit denen sich ein Quartierschnitt und verwandte Schnittmuster rationeller durchführen lassen. Diese Aufgabe wird erfindungsgemäß durch eine Sägestation gemäß Anspruch 1 bzw. eine Vorrichtung zum Zerlegen von Baumstämmen oder Baumstammteilen gemäß Anspruch 13 gelöst. Vorteilhafte Ausführungsformen sind in den Unteransprüchen angegeben.It is the object of the invention, a sawing station and a corresponding device for Disassembly of logs to provide a neighborhood cut and allow related patterns to be carried out more efficiently. This object is achieved according to the invention by a sawing station according to claim 1 or a device for disassembling Tree trunks or tree trunk parts solved according to claim 13. Advantageous embodiments are specified in the subclaims.

In Abkehr von der traditionellen Technik schlägt die Erfindung erstmals vor, in einer Sägestation Kreissägen einzusetzen, deren Schnittebenen, also die Ebenen der Sägeblätter, einen nicht verschwindenden Winkel einschließen, nämlich einen Winkel von 90°, was einen Quartierschnitt ermöglicht. Die Kreissägen sind dabei so angeordnet, daß die in dem Baumstamm erzeugten Schnittflächen aneinander anschließen, so daß in der Sägestation der Baumstamm gleichzeitig an zwei aneinander angrenzenden Seiten bearbeitet werden kann und sich bei einem Durchlauf durch die Sägestation mindestens zwei Bohlen ergeben, die von verschiedenen Seiten des Baumstammes abgetrennt wurden. Hierfür sind die Kreissägen kurz nacheinander angeordnet, so daß einerseits beide Sägen gleichzeitig das Baumstammteil bearbeiten können und andererseits die Sägeblätter der beiden Kreissägen einen ausreichenden Sicherheitsabstand haben, so daß sie nicht miteinander in Kontakt kommen.In a departure from traditional technology, the invention proposes for the first time in a sawing station Use circular saws whose cutting planes, i.e. the planes of the saw blades, are one do not include a vanishing angle, namely an angle of 90 °, which is a quarter cut allows. The circular saws are arranged so that those in the tree trunk Connect the cut surfaces generated so that the tree trunk in the sawing station can be edited simultaneously on two adjacent sides and at one pass through the sawing station result in at least two planks, which are of different sizes Sides of the tree trunk have been severed. For this, the circular saws are in quick succession arranged so that on the one hand both saws work the tree trunk part at the same time can and on the other hand the saw blades of the two circular saws have a sufficient safety distance have so that they do not come into contact with each other.

Gemäß der Erfindung sind die beiden Kreissägen jeweils mit mehreren Sägeblättern bestückt, so daß Baumviertel mit einer kleineren Breite in einem einzigen Sägegang im Quartierschnitt zerlegt werden können. Vorteilhafterweise haben dabei die Sägeblätter einen unterschiedlichen Durchmesser, welcher der abnehmenden Bohlenbreite beim Quartierschnitt entspricht (bezugnehmend auf Figur 1 sind beispielsweise die Bohlen, die mit den Schnitten 1 bis 4 erzeugt werden, wesentlich breiter als diejenigen Schnitte, die mit den Schnitten 14 bis 19 erzeugt werden). Vorzugsweise sind hierfür konzentrisch zueinander und entsprechend der vorgesehenen Bohlendicke beabstandet mehrere Sägeblätter angeordnet, deren Durchmesser in der Richtung weg von einem Anschlag für das Baumteil abnimmt. Bevorzugt ist eine Hohlwellenanordnung, bei der zumindest ein Teil der Sägeblätter auf Hohlwellen angeordnet ist, die in ihrem Inneren eine weitere Welle aufnehmen. Vorteilhafterweise sind die verschiedenen Wellen gegeneinander verschiebbar, so daß sich der Abstand der Sägeblätter und damit auch die Schnittdicke verändern läßt. Einzelne Sägeblätter können auswechselbar sein, um unterschiedliche Schnittdicken zu ermöglichen. Alternativ oder ergänzend kann auch vorgesehen sein, daß eine oder mehrere Hohlwellen in einer sie aufnehmenden Hohlwelle in einer Ebene senkrecht zur Wellenachse begrenzt verschiebbar sind , um den Abstand der Ränder der Sägeblätter in der Ebene senkrecht zur Wellenachse bei einem Quartierschnitt an eine veränderte Bohlendicke anpassen zu können. Dies läßt sich realisieren, indem die Durchmesser der Hohlwellen ausreichend groß gewählt werden und jede quer zur Axialrichtung verschiebbare Welle einen eigenen verlagerbaren Antrieb besitzt oder, was bevorzugt ist, über ein Getriebe mit einem gemeinsamen Antrieb verbunden ist, das eine Verlagerung der Wellen senkrecht zur Axialrichtung zuläßt, beispielsweise ein Schneckengetriebe, ein Getriebe mit einer Teleskopstange oder einem längenveränderlichen Wandlerzylinder oder dergleichen. Zur Veränderung der Dicke des ersten Schnitts kann ein verschiebbarer Anschlag vorgesehen sein.According to the invention, the two circular saws are each equipped with a plurality of saw blades, so that tree quarters with a smaller width in a single saw cut in the quarter cut can be disassembled. The saw blades advantageously have a different one Diameter, which corresponds to the decreasing plank width for the quarter cut (referring to FIG. 1 are, for example, the planks produced with the cuts 1 to 4 are much wider than those cuts that are created with the cuts 14 to 19 become). For this purpose, they are preferably concentric with one another and corresponding to those provided Screed thickness spaced several saw blades arranged, the diameter of which in the direction away from a stop for the tree part decreases. A hollow shaft arrangement is preferred in which at least some of the saw blades is arranged on hollow shafts that receive another shaft in their interior. The various shafts are advantageously displaceable relative to one another, so that the distance between the saw blades and thus also the cutting thickness can be changed. Separate Saw blades can be exchangeable to allow different cutting thicknesses. Alternatively or additionally, it can also be provided that one or more hollow shafts in a hollow shaft receiving them is limited in a plane perpendicular to the shaft axis are displaceable by the distance of the edges of the saw blades in the plane perpendicular to To be able to adapt the shaft axis to a changed screed thickness in a quarter cut. This can be achieved by choosing a sufficiently large diameter for the hollow shafts and each shaft that can be moved transversely to the axial direction has its own relocatable shaft Has drive or, which is preferred, via a transmission with a common drive connected, which allows the shafts to be displaced perpendicular to the axial direction, for example a worm gear, a gear with a telescopic rod or a variable-length converter cylinder or the like. To change the thickness of the first cut, a movable stop can be provided.

Gemäß einer bevorzugten Ausfiihrungsfonn ist vorgesehen, daß sich die Wellenanordnung einer Kreissäge insgesamt aus dem Bearbeitungsbereich heraus und in diesen hinein kontrolliert verlagern läßt, so daß durch Hineinschieben oder Herausziehen der Wellenanordnung die Zahl der Sägeblätter, welche in den Bearbeitungsbereich ragt, variiert werden kann. Dies ermöglicht es, die Sägestation in einfacher Weise an unterschiedliche Baumteildicken, die eine unterschiedliche Anzahl von Schnitten erfordern, anzupassen.According to a preferred embodiment it is provided that the shaft arrangement a circular saw altogether out of and into the machining area can be shifted in a controlled manner so that by pushing in or pulling out the Shaft arrangement the number of saw blades, which protrudes into the machining area, varies can be. This makes it possible to easily connect the saw station to different ones Adjust part thicknesses that require a different number of cuts.

Die erfindungsgemäße Sägestation kann einerseits eine vorteilhafte Anwendung in einer Sägestraße finden, bei der die Sägestation in Förderrichtung nach weiteren Sägestationen angeordnet ist, welche an den beiden zu bearbeitenden Seiten Bohlen abtrennen. Dies können eine oder mehrere weitere Sägestationen wie vorangehend beschrieben sein. Erfindungsgemäß ist jedoch auch vorgesehen, eine Sägestation wie vorangehend beschrieben nach einer Reihe von den Baumstamm oder das Baumstammteil nur auf einer Seite bearbeitenden Sägestationen anzuordnen, die den Baumstamm bzw. das Baumstammteil nacheinander, vorzugsweise abwechselnd, auf verschiedenen Seiten bearbeiten. Grundsätzlich ist auch denkbar, die erfindungsgemäße Sägestation im Vor- und Rücklauf in einer Hobeltechnik" wie vorangehend beschrieben zu betreiben, d. h. der Baumstamm oder das Baumstammteil wird durch die Sägestation gefahren und dann in der umgekehrten Richtung wieder zurückgefahren. Aufgrund der - vorteilhafterweise zueinander senkrechten - Anordnung der Kreissägen entfällt dabei das aufwendige Wenden nach jedem Sägegang.The saw station according to the invention can, on the one hand, be used advantageously in a Find the sawing street where the sawing station is in the conveying direction after further sawing stations is arranged, which cut planks on the two sides to be processed. You can one or more other sawing stations as described above. According to the invention, however, a saw station as described above is also provided after a row of the tree trunk or the tree trunk part only on one side Arrange processing saw stations that the tree trunk or the tree trunk part Work on different pages one after the other, preferably alternately. in principle is also conceivable, the saw station according to the invention in the forward and return in one Planing technique "as described above, i.e. the log or that Tree trunk part is driven through the sawing station and then in the opposite direction moved back again. Because of the - advantageously mutually perpendicular - The arrangement of the circular saws eliminates the time-consuming turning after each sawing operation.

Weitere Merkmale und Vorteile der Erfindung werden aus der nachfolgenden Beschreibung von Ausführungsbeispielen der Erfindung anhand der beigefügten Zeichnungen deutlich.

Fig. 1
zeigt das Schnittmuster eines Quartierschnitts,
Fig. 2
zeigt schematisch eine erste Ausführungsform einer erfindungsgemäßen Vorrichtung zum Zerlegen von Baumstämmen,
Fig. 3
zeigt schematisch die Anordnung der Kreissägen in einer erfindungsgemäßen Sägestation,
Fig. 4
zeigt schematisch den Aufbau einer Hohlwellensäge für einen variablen Einschnitt,
Fig. 5
zeigt eine zweite Ausführungsform einer erfindungsgemäßen Baumzerlegevorrichtung.
Further features and advantages of the invention will become apparent from the following description of exemplary embodiments of the invention with reference to the accompanying drawings.
Fig. 1
shows the pattern of a neighborhood section,
Fig. 2
schematically shows a first embodiment of a device according to the invention for cutting tree trunks,
Fig. 3
shows schematically the arrangement of the circular saws in a sawing station according to the invention,
Fig. 4
shows schematically the structure of a hollow shaft saw for a variable incision,
Fig. 5
shows a second embodiment of a tree cutting device according to the invention.

Das Sägewerk gemäß dem in Fig. 2 dargestellten Ausführungsbeispiel ist ein Sägewerk zum Zerlegen eines Baumstamms im Quartierschnitt und weist eine Rundholzaufgabe 1, einen Stammreduzierer 3, einen Entrinder 5, eine Wendevorrichtung 7, eine erste Blockbandsäge 13, eine zweite Blockbandsäge 21 sowie eine Sägestraße 29 auf.The sawmill according to the embodiment shown in FIG. 2 is a sawmill for Disassembling a tree trunk in a quarter cut and has a log task 1, one Trunk reducer 3, a debarker 5, a turning device 7, a first log band saw 13, a second block band saw 21 and a sawing road 29.

Die Rundholzaufgabe 1, der Stammreduzierer 3 und der Entrinder 5 sind in herkömmlicher Weise ausgestaltet. In der Rundholzaufgabe werden die Stämme mit einem Portalkran oder direkt von einem LKW aufgegeben und zu dem Stammreduzierer 3 gefördert, der stark abholzige, d.h. stark konische Stämme auf ein zu verarbeitendes Maß reduziert. Danach wird der ggf. reduzierte Baumstamm in dem Entrinder 5 entrindet.The log load 1, the trunk reducer 3 and the debarker 5 are conventional Wise designed. In the log task, the logs are lifted with a gantry crane or abandoned directly from a truck and conveyed to the trunk reducer 3, which is strong woody, i.e. strongly conical trunks reduced to a size to be processed. After that the possibly reduced tree trunk is debarked in debarker 5.

Danach wird der Baumstamm zu einer Wendevorrichtung 7 geführt. Dort wird der Stamm qualitativ beurteilt und so gedreht, daß Zonen schlechter bzw. guter Holzqualität möglichst ausschließlich in einem der vier durch die Vertikale und Horizontale gebildeten Quadranten liegen. The tree trunk is then guided to a turning device 7. There is the trunk qualitatively assessed and rotated so that zones of poor or good wood quality are possible exclusively in one of the four quadrants formed by the vertical and horizontal lie.

Nachdem der Baumstamm entsprechend ausgerichtet ist, wird er über eine geeignete Fördereinrichtung (nicht dargestellt) zu der Vertikal-Blockbandsäge 13 gefördert, die den Baumstamm durch einen vertikalen Schnitt im wesentlichen durch das Zentrum in zwei Stammhälften aufteilt.After the tree trunk is aligned accordingly, it is placed over a suitable one Conveyor (not shown) to the vertical band saw 13, which the Tree trunk through a vertical cut essentially through the center in two Split stem halves.

Die beiden Stammhälften werden nun durch einen Längsförderer 17 zu einem Querförderer 19 gefördert, der die beiden Stammhälften vereinzelt und einer zweiten Vertikal-Blockbandsäge 21 zuführt, wobei gleichzeitig die Stammhälften so orientiert werden, daß die Schnittfläche des vorherigen Schnitts parallel zur Horizontalen ist. Die Blockbandsäge 21 teilt nun durch einen weiteren vertikalen Schnitt jede der beiden Stammhälften in zwei Stammviertel.The two halves of the trunk are now a longitudinal conveyor 17 to a cross conveyor 19 promoted, which separated the two trunk halves and a second vertical log band saw 21 feeds, while the trunk halves are oriented so that the Cut area of the previous cut is parallel to the horizontal. The block band saw 21 divides now by another vertical cut each of the two halves of the trunk in two Trunk area.

Die beiden Stammviertel werden nun durch einen weiteren Querförderer 27 wieder vereinzelt und der Sägestraße 29 zugeführt.The two main quarters are now separated again by a further cross conveyor 27 and the Sägestrasse 29 fed.

Die Sägestraße 29 besteht aus einer zentralen Fördergasse 31, an deren Seiten abwechselnd angeordnete Trennbandsägen TA1, TA2 und TB1, TB2 angeordnet sind. Die Trennbandsägen TA1, TA2 und TB1, TB2 trennen jeweils eine Bohle von einem zugeführten Baumstammviertel ab, wobei das Baumstammviertel zwischen den Sägestationen gekippt wird, sodaß die Trennbandsägen TA1 und TA2 einerseits und die Trennbandsägen TB1 und TB2 andererseits das Baumstammviertel abwechselnd an den beiden geraden Seiten bearbeiten. Auf die Trennbandsägen folgt in Förderrichtung eine Kreissägenstation 33, deren Aufbau schematisch in Fig. 3 und 4 dargestellt ist.The Sägestraße 29 consists of a central conveyor lane 31, on the sides of which are arranged alternating band saws TA 1 , TA 2 and TB 1 , TB 2 . The band saws TA 1 , TA 2 and TB 1 , TB 2 each separate a screed from a supplied log section, whereby the log quarter is tipped between the sawing stations, so that the band saws TA 1 and TA 2 on the one hand and the band saw TB 1 and TB 2 on the other hand work the tree trunk quarter alternately on the two straight sides. The band saws are followed in the conveying direction by a circular saw station 33, the structure of which is shown schematically in FIGS. 3 and 4.

Die Kreissägenstation 33 besteht aus zwei gleich aufgebauten Kreissägen K1 und K2 mit zueinander senkrecht stehenden Schnittebenen, wobei jede Kreissäge K1 bzw. K2 mehrere Sägeblätter besitzt, im Fall des vorliegenden Ausführungsbeispiels vier, die in einer Hohlwellenanordnung mit ineinander angeordneten Wellen angeordnet sind, die im Fall der Kreissäge K1 mit 351, 352, 353 und 354 bezeichnet sind (vgl. Fig. 4). Der Durchmesser der Sägeblätter nimmt dabei zum freien Ende der Sägen hin entsprechend dem Muster des Quartierschnitts ab. Hohlwellenkreissägen für einen Einschnitt mit parallelen Schnittebenen sind allgemein bekannt. Daher werden die Sägen K1 und K2 nicht im einzelnen beschrieben. Aus dem gleichen Grund sind der Übersichtlichkeit halber die Sägeblätter selbst nicht dargestellt, sondern nur die jeweiligen Schnittlinien S1, S2, S3, S4 bzw. S5, S6, S7 und S8. The circular saw station 33 consists of two identical circular saws K 1 and K 2 with mutually perpendicular cutting planes, each circular saw K 1 and K 2 having a plurality of saw blades, four in the case of the present exemplary embodiment, which are arranged in a hollow shaft arrangement with shafts arranged one inside the other , which in the case of the circular saw K 1 are designated 35 1 , 35 2 , 35 3 and 35 4 (cf. FIG. 4). The diameter of the saw blades decreases towards the free end of the saws according to the pattern of the quarter cut. Hollow shaft circular saws for a cut with parallel cutting planes are generally known. The saws K 1 and K 2 are therefore not described in detail. For the same reason, for the sake of clarity, the saw blades themselves are not shown, but only the respective cutting lines S1, S2, S3, S4 or S5, S6, S7 and S8.

Die Kreissägen K1 und K2 sind voneinander in Förderrichtung etwas beabstandet, so daß die Sägeblätter nicht in Kontakt miteinander kommen. Die Durchmesser der einzelnen Sägeblätter sind so gewählt, daß entsprechend dem Muster des Quartierschnitts die Sägelinien S1, S2, S3 und S4 sich im wesentlichen bis zu den entsprechenden Sägelinien S5, S6, S7 bzw. S8 erstrecken können. Die Kreissägen K1 und K2 wirken jeweils mit einem (nicht dargestellten) verschiebbaren Anschlag zusammen, dessen Anschlaglinie A1 bzw. A2 in Fig.3 angedeutet ist.The circular saws K 1 and K 2 are slightly spaced apart from one another in the conveying direction, so that the saw blades do not come into contact with one another. The diameters of the individual saw blades are selected so that the saw lines S1, S2, S3 and S4 can extend essentially up to the corresponding saw lines S5, S6, S7 and S8 according to the pattern of the quarter cut. The circular saws K 1 and K 2 each interact with a displaceable stop (not shown), the stop line A1 or A2 of which is indicated in FIG.

Bei dem in Fig.4 dargestellten Ausführungsbeispiel einer Kreissäge K1 sind die Wellen 352 und 353 gegeneinander und gegenüber der Welle 351 axial verschiebbar, während die Welle 354 gegenüber der Welle 353 starr ist. Dementsprechend kann der Abstand der Schnittlinien S1 und S2 bzw. S2 und S3 variiert und somit auf eine gewünschte Schnittdicke eingestellt werden. Der Abstand der Schnittlinie S 1 von der Anschlaglinie A1 kann durch Verstellen des der Kreissäge K1 zugeordneten (nicht dargestellten) Anschlags variiert werden. Entsprechendes gilt für den Abstand zwischen A2 und S5 bei Säge K2. Dabei kann beispielsweise die (variable) Dicke der ersten Bohle, definiert durch den Abstand zwischen S1 und A1, etwa 50 mm betragen, die Dicke der zweiten und dritten Bohle zwischen S1 und S2 bzw. S2 und S3 zwischen 30 und 50 mm variieren und die (feste) Dicke der vierten Bohle zwischen S3 und S4 ungefähr 30 mm betragen. Selbstverständlich sind diese Angaben ebenso wie die vorangehend beschriebene Auswahl der verlagerbaren Wellen nur beispielhaft. Beispielsweise können auch alle Wellen oder andere Wellenkombinationen gegeneinander variabel axial verschiebbar sein.In the embodiment of a circular saw K 1 shown in FIG. 4 , the shafts 35 2 and 35 3 are axially displaceable relative to one another and with respect to the shaft 35 1 , while the shaft 35 4 is rigid with respect to the shaft 35 3 . Accordingly, the distance between the cutting lines S1 and S2 or S2 and S3 can be varied and thus set to a desired cutting thickness. The distance of the cutting line S 1 from the stop line A1 can be varied by adjusting the stop (not shown) assigned to the circular saw K 1 . The same applies to the distance between A2 and S5 with saw K 2 . For example, the (variable) thickness of the first screed, defined by the distance between S1 and A1, can be approximately 50 mm, the thickness of the second and third screed can vary between 30 and 50 mm between S1 and S2 or S2 and S3, and the (Fixed) thickness of the fourth screed between S3 and S4 is approximately 30 mm. Of course, this information, like the selection of the displaceable shafts described above, is only exemplary. For example, all shafts or other shaft combinations can be variably axially displaceable relative to one another.

Die Kreissägen K1 und K2 sind insgesamt in der jeweiligen axialen Richtung R1 bzw. R2 verlagerbar und können ganz oder teilweise aus dem Bearbeitungsbereich herausgefahren werden, beispielsweise derart, daß nur noch Schnitte entlang den Linien S2 bis S4 bzw. S6 bis S8 durchgeführt werden, während die Sägeblätter, welche für die Schnitte entlang den Linien S1 und S5 vorgesehen sind, außerhalb des Bearbeitungsbereichs liegen. Auf diese Art kann die Zahl der Schnitte variiert werden und die Sägestation auf unterschiedliche Stammdurchmesser abgestellt werden. Vorzugsweise ist vorgesehen, daß die Sägen K1 und K2 beide jeweils in den Richtungen R1 und R2 verlagerbar sind, also sowohl in axialer Richtung also auch senkrecht dazu, um die beiden Sägen hinsichtlich der Bohlendicke aufeinander abzustimmen. Gemäß einer bevorzugten Ausführungsform sind außerdem die Hohlwellen 352 bis 354 aus der in Fig. 3 und 4 gezeigten konzentrischen Anordnung in eine exzentrische Lage verlagerbar, so daß bei einer axialen Verlagerung einer der Hohlwellen der Säge K1 in der Richtung R1, die eine Verlagerung des Kreuzungspunkts einer oder mehrerer der Schnittlinien S1 bis S4 mit einer der Schnittlinien S5 bis S8 bedingt, die entsprechenden Hohlwellen der Säge K2 relativ zueinander, ebenfalls in der Richtung R1, in eine bezüglich einer äußeren Hohlwelle exzentrische Lage verschoben werden können, so daß das in Fig. 3 gezeigte Schnittbild insgesamt beibehalten wird. Beispielsweise kann zum Verändern der zweiten Schnittdicke (S1/S2) die Welle 352 axial verlagert werden und die Welle, welche die Schnittlinie S6 festlegt, in die Richtung R1, senkrecht zu ihrer axialen Richtung, in eine exzentrische Position verlagert werden. In gleicher Weise kann auch die dritte Schnittdicke (S2/S3) unter Beibehaltung des Schnittbildes der Fig. 3 durch eine axiale Verlagerung der Welle 353 und eine Verlagerung der entsprechenden Welle der Säge K2 in die Richtung R1 verändert werden. Wird die Schnittdicke bei beiden Sägen geändert, wird man, sofern sich dies nicht alleine durch Veränderung der Anschläge erreichen läßt, beide Kreissägen K1 und K2 insgesamt in der Richtung senkrecht zu ihrer axialen Richtung (R2 bzw. R1) verschieben bzw. einzelne Wellen in die entsprechende Richtung in eine exzentrische Position verlagern. Alternativ zu einer Verlagerung der Anschläge können die Sägen K1 und K2 zum Verändern der Dicke einer ersten Bohle auch insgesamt in die Richtung R1 oder R2 (oder in beide Richtungen gleichzeitig) verlagert werden.The circular saws K 1 and K 2 can be displaced overall in the respective axial direction R 1 or R 2 and can be wholly or partially moved out of the processing area, for example in such a way that only cuts along the lines S2 to S4 or S6 to S8 be carried out while the saw blades, which are intended for the cuts along the lines S1 and S5, lie outside the processing area. In this way, the number of cuts can be varied and the saw station can be set to different log diameters. It is preferably provided that the saws K 1 and K 2 can both be displaced in the directions R 1 and R 2 , that is to say both in the axial direction and perpendicularly thereto, in order to match the two saws with respect to the thickness of the screed. According to a preferred embodiment, the hollow shafts 35 2 to 35 4 can also be displaced from the concentric arrangement shown in FIGS. 3 and 4 into an eccentric position, so that in the event of an axial displacement of one of the hollow shafts of the saw K 1 in the direction R 1 , the a displacement of the crossing point of one or more of the cutting lines S1 to S4 with one of the cutting lines S5 to S8 causes the corresponding hollow shafts of the saw K 2 to be displaced relative to one another, likewise in the direction R 1 , into a position eccentric with respect to an outer hollow shaft, so that the sectional view shown in Fig. 3 is retained overall. For example, to change the second section thickness (S1 / S2), the shaft 35 2 can be axially displaced and the shaft, which defines the section line S6, can be displaced in the direction R 1 , perpendicular to its axial direction, into an eccentric position. In the same way, the third section thickness (S2 / S3) can be changed while maintaining the section of FIG. 3 by an axial displacement of the shaft 35 3 and a displacement of the corresponding shaft of the saw K 2 in the direction R 1 . If the cutting thickness of both saws is changed, if this cannot be achieved by changing the stops alone, both circular saws K 1 and K 2 will be moved in the direction perpendicular to their axial direction (R 2 or R 1 ) or shift individual shafts in the corresponding direction to an eccentric position. As an alternative to moving the stops, the saws K 1 and K 2 can also be moved in the direction R 1 or R 2 (or in both directions simultaneously) to change the thickness of a first screed.

Bei der in Fig.2 dargestellten Ausfiihrungsform der erfindungsgemäßen Baumzerlegungsvorrichtung, die insbesondere für größere Baumdurchmesser gedacht ist, werden in den Bandsägestationen TA1, TA2 bzw TB1 und TB2 entsprechend dem Quartierschnitt Bohlen abgetrennt. Dabei können natürlich durchaus auch mehr als die vier dargestellten Sägestationen vorhanden sein. Der Restkeil, der nach der Bearbeitung durch diese Stationen übrig bleibt, wird dann durch die Kreissägenstation 33 vollständig entsprechend dem Quartierschnitt zerlegt.In the embodiment of the tree cutting device according to the invention shown in FIG. 2, which is intended in particular for larger tree diameters, planks are cut off in the band sawing stations TA 1 , TA 2 or TB 1 and TB 2 in accordance with the neighborhood cut. Of course, there may also be more than the four saw stations shown. The remaining wedge that remains after processing by these stations is then completely broken down by the circular saw station 33 in accordance with the neighborhood cut.

Fig.5 zeigt eine zweite Ausführungsform einer erfindungsgemäßen Baumzerlegevorrichtung, bei der die Bandsägenstationen TA1, TA2 und TB1 und TB2 entfallen sind und nur eine einzige Kreissägenstation 33 wie vorangehend beschreiben vorgesehen ist. Die Kreissägenstation 33 zerlegt dann bei dieser Ausfllhrungsfonn in einem einzigen Arbeitsgang das zugeführte Baumviertel. Diese Ausführungsform ist insbesondere für Rundholz mit geringerem Durchmesser geeignet. In einer Abwandlung kann die Sägestation 33 so eingerichtet sein, daß sie im Vor- und Rücklauf arbeitet, so daß der Restkeil, der nach einer ersten Bearbeitung in der Sägestation 33 verbleibt, in umgekehrter Richtung wieder der Sägestation 33 zugeführt wird, dort weiter zerlegt wird, und so fort, bis das gesamte Baumstammviertel zerlegt ist.5 shows a second embodiment of a tree cutting device according to the invention, in which the band saw stations TA 1 , TA 2 and TB 1 and TB 2 have been omitted and only a single circular saw station 33 is provided as described above. The circular saw station 33 then disassembles the supplied tree quarter in a single operation in this execution form. This embodiment is particularly suitable for logs with a smaller diameter. In a modification, the sawing station 33 can be set up in such a way that it works in the forward and return directions, so that the remaining wedge which remains in the sawing station 33 after a first machining operation is fed back to the sawing station 33 in the opposite direction, where it is further dismantled , and so on until the entire tree trunk quarter is disassembled.

Alternativ kann auch vorgesehen sein, daß nach der Sägestation 33 eine oder mehrere weitere ähnlich aufgebaute Kreissägenstationen angeordnet sind, die den Restkeil weiter zerlegen. Dies ist in Fig.5 durch die gestrichelt dargestellte Station 33' angedeutet.Alternatively, it can also be provided that after the sawing station 33 one or more others similarly constructed circular saw stations are arranged, which further disassemble the remaining wedge. This is indicated in FIG. 5 by the station 33 'shown in broken lines.

Claims (18)

  1. A sawing station for dissecting planks from different, adjacent sides of a log or log portion, comprising a working area within which the log or log portion is sawn, at least two circular saws (K1, K2) for dissecting one or more planks from the log or log portion, wherein a dissection plane of the first circular saw (K1) encloses a finite angle with a dissection plane of the second circular saw (K2), characterized in that the circular saws (K1, K2) are each provided with a plurality of saw blades for the simultaneous dissection of a plurality of planks, and are configured such that a plurality of planks is dissected on two sides of the log or log portion in one pass, the two sides extending orthogonally to each other.
  2. The sawing station of claim 1, characterized in that the two circular saws (K1, K2) are configured for working the log or log section simultaneously.
  3. The sawing station of claim 1 or 2, characterized in that one of the two circular saws (K1, K2) is allocated to a stop, the stop being adapted to be displaced in a direction orthogonal to the dissection plane, the stop together with a saw blade of the allocated circular saw defining the thickness of a dissected plank.
  4. The sawing station of any of claims 1 to 3, characterized in that the relative distance between the saw blades is adapted to be varied.
  5. The sawing station of any of claims 1 to 4, characterized in that the diameter of the saw blades decreases in a direction from a stop for the log or log portion towards and into the working area.
  6. The sawing station of any of claims 1 to 5, characterized in that the number of saw blades extending into the working area is adapted to be varied.
  7. The sawing station of claim 6, characterized in that the saw blade arrangement of at least one circular saw (K1) is arranged to be axially displaced as a whole, such that the number of saw blades extending into the working area may be varied by displacing the entire saw blade arrangement.
  8. The sawing station of any of claims 1 to 7, characterized that the plurality of planks is dissected in one pass according to a quarter cut pattern on two orthogonally extending sides of the log or log portion, wherein the saw blades of the circular saw are arranged and configured such that the thickness of planks dissected on one of the two sides or on both sides of the log or log portion may be varied individually.
  9. The sawing station of any of claims 1 to 8, characterized in that at least one circular saw (K1, K2) is a hollow shaft circular saw having a plurality of shafts (351,...,354) housed within each other and driving each one or more saw blades.
  10. The sawing station of claim 9, characterized in that at least some of the shafts (352, 353) are adapted to be axially displaced relative to at least one other shaft (351) such that the distance between at least two saw blades is varied.
  11. The sawing station of any of claims 1 to 10, characterized in that within at least one circular saw (R1, K2) one or more of the shafts (351,...,354) driving the saw blades may be displaced from a concentric position relative to another shaft into an eccentric position and/or from an eccentric position into another eccentric position.
  12. The sawing station of any of claims 1 to 11, characterized in that within the one circular saw (K1, K2) the saw blades are adapted to be displaced relative to each other at least in an axial direction and that within the other circular saw (K2, K1) the saw blades are adapted to be displaced relative to each other at least in a plane transverse to the axial direction of the drive shaft.
  13. An apparatus for dissecting logs and/or log portions according to a dissection pattern comprising non-parallel dissection planes, characterized by a circular saw station (33, 33') according to any of claims 1 to 12 and a conveyor assembly for feeding logs and/or log portions to the circular saw station (33, 33').
  14. The apparatus of claim 13, characterized in that an apparatus for dissection a log into quarters is located upstream the saw station in a conveying direction.
  15. The apparatus of claims 13 or 14, characterized in that one or more sawing stations (TA1, TA2, TB1, TB2) for generating cuts in non-parallel planes within the log or log portion are located upstream the circular saw station (33, 33').
  16. The apparatus of claim 13, characterized in that the stations located upstream the circular saw stations comprise band saws.
  17. A method of dissecting a log or log portion according to a dissection pattern comprising non-parallel dissection planes, characterized in that planks are dissected from the log or log portion by means of a sawing station according to any of claims 1 to 12, and that the remaining wedge-shaped part of the log or log section is returned to the same sawing station for further dissection.
  18. The method of claim 17, characterized in that the remaining wedge-shaped part is returned to the sawing station in an inverted conveying direction.
EP00108393A 1999-04-23 2000-04-17 Device for cutting up logs using a quarter-cut and associated sawing station Expired - Lifetime EP1046480B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE19918637 1999-04-23
DE19918637 1999-04-23
DE19927742 1999-06-17
DE19927742A DE19927742C1 (en) 1999-04-23 1999-06-17 Device for cutting tree trunks in a quarter cut and associated saw station

Publications (3)

Publication Number Publication Date
EP1046480A2 EP1046480A2 (en) 2000-10-25
EP1046480A3 EP1046480A3 (en) 2001-10-10
EP1046480B1 true EP1046480B1 (en) 2004-12-22

Family

ID=26053064

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00108393A Expired - Lifetime EP1046480B1 (en) 1999-04-23 2000-04-17 Device for cutting up logs using a quarter-cut and associated sawing station

Country Status (2)

Country Link
EP (1) EP1046480B1 (en)
AT (1) ATE285318T1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016172763A1 (en) * 2015-04-25 2016-11-03 Andrew Knorr Radial parallel sawing

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE78836C (en) * F. E. STUHLMANN, Barmen-Wichlinghausen Wood angle or packing strip cutting machine
US3141482A (en) * 1961-07-19 1964-07-21 Sam K Arness Core mill
EP0106907B1 (en) * 1982-10-22 1988-01-07 Gebrüder Linck, Maschinenfabrik "Gatterlinck" GmbH & Co.KG Circular saw with adjustable saw blades
ATE64885T1 (en) * 1988-03-11 1991-07-15 Ludwig Loesch ROUND TIMBER RADIAL CUTTING PROCESS.
SE9200923L (en) * 1991-03-27 1992-09-28 Risto Heikki Pitkaenen PROCEDURE FOR QUALITY SAWING OF SAW STOCK
FR2709263B1 (en) * 1993-08-27 1995-11-10 Cirad Line and process of sawing wood on quarter.
SK280288B6 (en) * 1994-07-06 1999-11-08 Wep Trading Equipment for oblong processing of wooden materials
DE19920546A1 (en) * 1999-05-05 2000-11-09 Esterer Wd Gmbh & Co Method and device for breaking logs into boards

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016172763A1 (en) * 2015-04-25 2016-11-03 Andrew Knorr Radial parallel sawing

Also Published As

Publication number Publication date
ATE285318T1 (en) 2005-01-15
EP1046480A3 (en) 2001-10-10
EP1046480A2 (en) 2000-10-25

Similar Documents

Publication Publication Date Title
WO1987005555A1 (en) Process and device for feeding tree-trunks to a processing machine
EP0286701B1 (en) Method and device for the edge trimming of round wood
EP0332149B1 (en) Apparatus for milling surface contours onto wooden boards
EP0634254A1 (en) Device with feed carriage and method for producing wood products from logs
DE3415932A1 (en) DEVICE FOR MACHINING THE SIDES OF TIMBER STREAMS
EP0217784B1 (en) Method and machine for edge-trimming trunks
AT399307B (en) METHOD AND DEVICE FOR THE METAL DISASSEMBLY OF TREE TRUNKS IN ALL-SIDED WOODEN PRODUCTS
EP0963822B1 (en) Device and method for subdividing logs
EP1046480B1 (en) Device for cutting up logs using a quarter-cut and associated sawing station
CH646091A5 (en) METHOD AND DEVICE FOR THE EXTENSIVE DISASSEMBLY OF TREE TRUNKS IN MAIN GOODS AND SIDEBOARDS.
DE4419324C2 (en) Device for working wood
DE3623235C2 (en)
EP0785051B1 (en) Method and device for cutting logs
DE19927742C1 (en) Device for cutting tree trunks in a quarter cut and associated saw station
DE3244450C2 (en)
DE102004049699A1 (en) Sawing device for long timber has saw unit with at least two blades and conveyor unit moving timber in feed direction transverse to longitudinal direction of timber
EP1038643A2 (en) Band saw mill for cutting up logs, in particular for quarter-logs
EP2193894A1 (en) Method for sawing up at least one board
DE2940820A1 (en) Multiple cut block bandsaw - has smaller additional guide rollers, and tension rollers equalising tension of blades
EP1824649B1 (en) Method and device for conveying and processing logs
DE3347584A1 (en) Sawmill installation and method of producing timber products machined all over
DE60208737T2 (en) Device for two-sided cutting of objects
DE4407379C2 (en) Sawing machine
DE3820148C2 (en)
EP4215323A1 (en) Method and device for producing sawn timber from a log, and scoring saw suitable for carrying out said method

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

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20010927

17Q First examination report despatched

Effective date: 20020311

AKX Designation fees paid

Free format text: AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AXX Extension fees paid

Free format text: LT PAYMENT 20020327;LV PAYMENT 20020327;RO PAYMENT 20020327

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: ESTERER WD GMBH & CO.

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHWAIGER, EDELTRAUD

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Extension state: LT LV RO

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041222

Ref country code: IT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20041222

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041222

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041222

Ref country code: FR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041222

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20041222

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

RIN1 Information on inventor provided before grant (corrected)

Inventor name: SCHWAIGER, EDELTRAUD

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

RAP2 Party data changed (patent owner data changed or rights of a patent transferred)

Owner name: ESTERER WD GMBH & CO. KG

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: GERMAN

REF Corresponds to:

Ref document number: 50008991

Country of ref document: DE

Date of ref document: 20050127

Kind code of ref document: P

NLT2 Nl: modifications (of names), taken from the european patent patent bulletin

Owner name: ESTERER WD GMBH & CO. KG

REG Reference to a national code

Ref country code: CH

Ref legal event code: NV

Representative=s name: TROESCH SCHEIDEGGER WERNER AG

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050322

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050322

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050322

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050402

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050417

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20050417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050430

LTIE Lt: invalidation of european patent or patent extension

Effective date: 20041222

NLV1 Nl: lapsed or annulled due to failure to fulfill the requirements of art. 29p and 29m of the patents act
GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 20041222

REG Reference to a national code

Ref country code: IE

Ref legal event code: FD4D

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

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

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20050923

EN Fr: translation not filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20050522

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090527

Year of fee payment: 10

Ref country code: AT

Payment date: 20090416

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 20090528

Year of fee payment: 10

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 20090417

Year of fee payment: 10

BERE Be: lapsed

Owner name: *ESTERER WD G.M.B.H. & CO.

Effective date: 20100430

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100417

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20101103

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100430

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100430