EP0440151A2 - Procédé pour aplatir des troncs d'arbres - Google Patents

Procédé pour aplatir des troncs d'arbres Download PDF

Info

Publication number
EP0440151A2
EP0440151A2 EP19910101103 EP91101103A EP0440151A2 EP 0440151 A2 EP0440151 A2 EP 0440151A2 EP 19910101103 EP19910101103 EP 19910101103 EP 91101103 A EP91101103 A EP 91101103A EP 0440151 A2 EP0440151 A2 EP 0440151A2
Authority
EP
European Patent Office
Prior art keywords
point
reference plane
earth
tree
tree trunk
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP19910101103
Other languages
German (de)
English (en)
Other versions
EP0440151B1 (fr
EP0440151A3 (en
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.)
Wurster u Dietz GmbH u Co Maschinenfabrik
Original Assignee
Wurster u Dietz GmbH u Co Maschinenfabrik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wurster u Dietz GmbH u Co Maschinenfabrik filed Critical Wurster u Dietz GmbH u Co Maschinenfabrik
Publication of EP0440151A2 publication Critical patent/EP0440151A2/fr
Publication of EP0440151A3 publication Critical patent/EP0440151A3/de
Application granted granted Critical
Publication of EP0440151B1 publication Critical patent/EP0440151B1/fr
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
    • 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
    • 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
    • B27B1/007—Methods for subdividing trunks or logs essentially involving sawing taking into account geometric properties of the trunks or logs to be sawn, e.g. curvature
    • 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
    • B27C1/00—Machines for producing flat surfaces, e.g. by rotary cutters; Equipment therefor
    • B27C1/02—Smoothing, i.e. working one side only
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/525—Operation controlled by detector means responsive to work
    • Y10T83/536—Movement of work controlled

Definitions

  • the invention relates to a method for flattening tree trunks with a curved longitudinal center line, in which the tree trunks are conveyed in the lying position with their convex side up and their concave side down in the longitudinal direction and flattened on the concave side in the region of an earth end from below and before the flattening in one position are measured, in which they lie only at end points of the concave side on a reference plane, the position of a first point of the tree trunk being determined after its elevation above the reference plane, and the tree trunks on the reference plane at the end of the earth when the end of the end facing away from the ground is continuously supported be lowered far so that the first point lies in a predetermined plane, and the tree trunks are flattened in this lowered position up to the reference plane.
  • a method and a device of the type mentioned above are known from DE-OS 37 30 865.
  • tree trunks that are to be processed into finished products such as squared timber, boards and the like in sawmill systems have grown strictly straight only in exceptional cases due to natural conditions.
  • the tree trunks delivered generally have a curved longitudinal center line, so that this odd growth form must be taken into account when processing the tree trunks in order to obtain an optimal wood yield.
  • Another possible source of error in such tree trunks is the shape of the so-called earth end, ie the thickening of the trunk in the transition to the root area.
  • Tree trunks are sawn off as close to the ground as possible for the sake of optimal yield, so that a considerable proportion of the tree trunk length, for example one meter, widens conically progressively and thus has a considerably larger cross-section than the otherwise more or less regularly tapered rest Tree trunk. If a tree trunk of this type with the end of the earth now lies on a flat contact surface of a conventional transport device for sawmill systems, it would it also lies very obliquely with the otherwise straight longitudinal center line, because the earth end with its much larger diameter allows the thicker end of the tree to stand up.
  • the end of the earth is flattened on one side on the concave curved side of the tree trunk, so that the tree trunk comes to a flatter support on a conveyor and therefore a better wood yield is achieved.
  • the tree trunks are measured before flattening in such a way that the position of the first point on the concave side is determined as the point of greatest deflection after the distance from the earthed end point and after it has been raised above the reference plane becomes.
  • the tree trunk is then lowered so far at the end of the earth that the first point lies in the reference plane.
  • the invention is therefore based on the object of developing a method and a device of the type mentioned at the outset in such a way that this wish is taken into account.
  • this object is achieved according to the invention in that the first point on the convex side marks the lowest point between the highest elevation and the end of the earth, and in that the predetermined plane lies at a height above the reference plane which corresponds to the diameter of the tree trunk at the end facing away from the earth.
  • the object on which the invention is based is completely achieved in this way because the abovementioned measures enable an even higher wood yield in a large number of tree species and also in certain types of tree growth than is the case according to the method mentioned at the beginning.
  • the method according to the invention has the advantage that it is easier to carry out in practice because only two diameters must be determined.
  • Fig. 1 designates a tree trunk of natural growth, the longitudinal center line 10a of which is curved.
  • the tree trunk 10 is arranged horizontally, so that a convexly curved side 11 is at the top and a concavely curved side 12 is at the bottom. In this position, the tree trunk 10 lies on a reference plane denoted by 13, which can be, for example, an upper level of a conveying device of a sawmill system.
  • the left, thinner end of the tree trunk 10 in FIG. 1 has a first point 20 and a second point 21 as end points of the thinner end and the diameter of the tree trunk 10 at the thinner end is denoted by d0.
  • the tree trunk 10 lies with a third point 22 on the reference plane 13.
  • a fourth point 23 marks the point of highest elevation on the convex side 11 of the tree trunk 10.
  • a fifth point 26 marks on the convex side 11 the lowest point between the fourth point 23 of the highest elevation and the end of the earth 27.
  • the height of the tree trunk 10 in the fifth Point 26 is denoted by h.
  • the measured values d0 and h can be determined using measuring devices known per se, as will be explained further below with reference to FIGS. 3 to 5.
  • the tree trunk 10 In order to pre-process the tree trunk 10 in a manner that enables subsequent processing with optimum wood yield, the tree trunk 10, as shown in FIG. 2 in detail, should now be lowered into a position in which the thinner end of the tree trunk 10 matches the first Point 20 on the reference plane 13 remains that the thicker end of the tree trunk 10 is lowered so far with the earth end 27 that the fifth point 26 on the convex side 11 comes to lie at the height of the second point 21 above the reference plane 13.
  • the tree trunk 10 arrives from its starting position shown in dashed lines there, which corresponds to that of FIG. 1, into its end position drawn in solid lines.
  • the seventh point 26 becomes 26 'and comes to lie at the height d 13 above the reference plane 13.
  • the tree trunk flattened in this way now has an optimal contour in the horizontal direction for subsequent processing from the point of view of the best possible use of space.
  • the subsequent processing can e.g. consist in a manner known per se that the flattened tree trunk 10 is now also flattened on the remaining 3 sides and then side boards or squared timbers are separated from the flattened sides.
  • 40 designates a first conveyor device, for example a conveyor belt, on which the tree trunk 10 is promoted from left to right in Fig. 3.
  • the earth end 27 is conveyed ahead in the conveying direction, but this does not have to be the case, because even with a corresponding adaptation of the elements still to be explained below, a conveyance of the tree trunk 10 with the thin end ahead would also be possible without further ado.
  • the tree trunk 10 passes through a light curtain 41 on its way in the first conveyor device 40, as will be explained further below with reference to FIGS. 4 and 5.
  • the light curtain 41 is connected to a control unit 42, so that all the characteristic values d0, d1 and d max already explained for FIG. 1 are supplied to the control unit 42.
  • the control unit 42 determines the lowering value A from these input values and uses it to control a lifting device 43 which grasps the tree trunk 10 in the region of the end of the earth.
  • the tree trunk 10 After leaving the first conveying device 40, the tree trunk 10 'projects freely with its earth end 27, so that the earth end 27' can be lowered by the lowering amount A when the thin end of the tree trunk 10 'is continuously supported.
  • the area 30 thus passes below the reference plane 13 and can be removed by means of a milling cutter 44 or another suitable tool. It goes without saying that, instead of the lifting device 43 acting from above and drawn in in FIG. 3, a lifting device 43 'acting from below can also be used in order to lower the earth end 27' in the manner described.
  • the flattened tree trunk 10 '' then arrives at a second conveyor 45, from which it receives further processing stations, e.g. is further fed to flat milling cutters, corner milling cutters, cut-off and cross-cut saws and the like, as is known per se.
  • the light curtain 41 preferably consists of a rectangular frame which surrounds the first conveyor device 40 on all sides.
  • light transmitters 50 are attached, which are opposed by light receivers 51, for example photodiodes or the like, on the other vertical leg.
  • a curtain of light rays 52 is created, ie a plurality of horizontally aligned light barriers arranged one above the other, which are more or less interrupted by the contour of the tree trunk 10. 5 clearly shows that in this way the contour of the tree trunk 10 can also be detected without contact in the region of the convex side 12.
  • the lifting device 43 or 43 'in the lowering plane marked A in FIGS. 1 and 2 can act with the fifth point 26, but does not have to act, because, of course, lowering is also possible in the radial plane defined by the third point 22 or in another radial plane, in which case the specified relationship for the lowering value A would have to be adapted accordingly.
EP19910101103 1990-02-02 1991-01-29 Procédé pour aplatir des troncs d'arbres Expired - Lifetime EP0440151B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4003023 1990-02-02
DE19904003023 DE4003023C1 (fr) 1990-02-02 1990-02-02

Publications (3)

Publication Number Publication Date
EP0440151A2 true EP0440151A2 (fr) 1991-08-07
EP0440151A3 EP0440151A3 (en) 1992-04-08
EP0440151B1 EP0440151B1 (fr) 1994-10-05

Family

ID=6399244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910101103 Expired - Lifetime EP0440151B1 (fr) 1990-02-02 1991-01-29 Procédé pour aplatir des troncs d'arbres

Country Status (5)

Country Link
US (1) US5111862A (fr)
EP (1) EP0440151B1 (fr)
AT (1) ATE112515T1 (fr)
CA (1) CA2035310C (fr)
DE (2) DE4003023C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004037268A1 (de) * 2004-07-31 2006-03-23 Hollmann Sondermaschinen Gmbh Verfahren zum Vermessen von langgestreckten Hölzern oder Holzelementen sowie Vorrichtung zum Durchführen dieses Verfahrens

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10342903B4 (de) * 2003-09-17 2006-03-09 Siempelkamp Maschinen- Und Anlagenbau Gmbh & Co. Kg Streugutbunker mit einer Austragsvorrichtung zum Streuen von Streugut
CA2545787C (fr) 2005-05-05 2009-07-14 Centre De Recherche Industrielle Du Quebec Systeme et methode de surveillance de la qualite de coupe

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456774A (en) * 1967-05-02 1969-07-22 Weyerhaeuser Co Method and apparatus for aligning and transferring logs
CA1018868A (fr) * 1975-11-26 1977-10-11 Macmillan Bloedel Limited Methode et materiel d'alignement des grumes
WO1988001223A1 (fr) * 1986-08-22 1988-02-25 Societe D'exploitation Du Bureau D'etudes Industri Procede et dispositif pour la mesure et le positionnement d'une piece de bois dans une machine a bois du type deligneuse
DE3730865A1 (de) * 1987-09-15 1989-03-30 Wurster & Dietz Maschf Verfahren zum anflachen von baumstaemmen und vorrichtung zur durchfuehrung des verfahrens

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI67317C (fi) * 1980-11-14 1985-03-11 Ahlstroem Oy Anordning foer inriktning av ett saogvarustycke i synnerhet et block
DE3244393C1 (de) * 1982-12-01 1984-03-01 Wurster u. Dietz GmbH u. Co Maschinenfabrik, 7400 Tübingen Verfahren zum Herstellen von allseitig bearbeiteten Holzerzeugnissen sowie Vorrichtung zur Durchfuehrung des Verfahrens
DE3419212C1 (de) * 1984-05-23 1988-11-10 Jenkner, Erwin, 7261 Gechingen Verfahren zum Besaeumen und Aufteilen von Brettern mit Rohkanten,wie Waldkanten,und Einrichtung zur Durchfuehrung des Verfahrens
US4839816A (en) * 1987-06-02 1989-06-13 Cattrall Thomas J Lumber cutting system
US4774988A (en) * 1987-09-11 1988-10-04 Weyerhaeuser Company Method for measuring edge profile of an elongated member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3456774A (en) * 1967-05-02 1969-07-22 Weyerhaeuser Co Method and apparatus for aligning and transferring logs
CA1018868A (fr) * 1975-11-26 1977-10-11 Macmillan Bloedel Limited Methode et materiel d'alignement des grumes
WO1988001223A1 (fr) * 1986-08-22 1988-02-25 Societe D'exploitation Du Bureau D'etudes Industri Procede et dispositif pour la mesure et le positionnement d'une piece de bois dans une machine a bois du type deligneuse
DE3730865A1 (de) * 1987-09-15 1989-03-30 Wurster & Dietz Maschf Verfahren zum anflachen von baumstaemmen und vorrichtung zur durchfuehrung des verfahrens

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
TRANSACTIONS OF THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS, JOURNAL OF ENGINEERING FOR INDUSTRY Bd. 105, August 1983, NEW YORK (US) Seiten 155 - 160; S.C. SARIN: 'Two-Dimensional Stock Cutting Problems and Solution Methodologies' *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102004037268A1 (de) * 2004-07-31 2006-03-23 Hollmann Sondermaschinen Gmbh Verfahren zum Vermessen von langgestreckten Hölzern oder Holzelementen sowie Vorrichtung zum Durchführen dieses Verfahrens

Also Published As

Publication number Publication date
ATE112515T1 (de) 1994-10-15
DE59103142D1 (de) 1994-11-10
DE4003023C1 (fr) 1991-09-05
CA2035310C (fr) 1994-10-04
EP0440151B1 (fr) 1994-10-05
EP0440151A3 (en) 1992-04-08
CA2035310A1 (fr) 1991-08-03
US5111862A (en) 1992-05-12

Similar Documents

Publication Publication Date Title
CH639892A5 (de) Verfahren und vorrichtung zur spanenden zerlegung von baumstaemmen in allseitig bearbeitete holzerzeugnisse, wie bretter und kantholz.
DE2703222A1 (de) Vorrichtung zum saegen von nutzholz mit gekruemmtem schnitt
DE3244393C1 (de) Verfahren zum Herstellen von allseitig bearbeiteten Holzerzeugnissen sowie Vorrichtung zur Durchfuehrung des Verfahrens
DE3720169A1 (de) Saegevorrichtung
DE2605987C3 (de) Verfahren und Vorrichtung zum Sägen von Holz
DE2920543A1 (de) Verfahren und vorrichtung zum verarbeiten von rundholz zu schnittholz
AT397224B (de) Verfahren und vorrichtung zum herstellen von vierkantern aus baumstämmen od. dgl.
EP0440151B1 (fr) Procédé pour aplatir des troncs d'arbres
DE3730865C2 (fr)
DE4212432A1 (de) Vorrichtung zum spanlosen Abschneiden von Holzlamellen von einem Kantholz
CH683828A5 (de) Verfahren zum Erzeugen von Nutzholz aus Baumstämmen oder Modeln, und Vorrichtung zum Durchführen des Verfahrens.
WO1988000517A1 (fr) Procede et dispositif de decoupage sans eclats de troncs d'arbres en produits de bois
DE3347584C2 (fr)
EP1592538A1 (fr) Procede et ligne d'usinage permettant de decouper des troncs d'arbres
EP1365899B1 (fr) Procede et dispositif pour decouper des bois ronds courbes dans un plan afin d'obtenir des produits ligneux
DE3514892C1 (de) Verfahren und Vorrichtung zum Zerspanen von Holz, insbesondere zur spanenden Zerlegung von mit Baukanten versehenen Baumstämmen
DE19929355A1 (de) Verfahren und Vorrichtung zum Herstellen von acht- oder mehrseitigen Kanthölzern
EP0785051A1 (fr) Procédé et dispositif pour découper des troncs d'arbres
DE102007008304B3 (de) Vorrichtung zum Bearbeiten von Baumstämmen
DE102013108909B4 (de) Vorrichtung und Verfahren zum Zerlegen von Brettern oder Balken
DE3418223C2 (fr)
AT523679B1 (de) Verfahren zum Zerteilen eines Baumstamms sowie Sägeanlage zur Durchführung des Verfahrens
EP1648668B1 (fr) Procede et dispositif pour coupe de troncs d'arbre coniques
DE202011051518U1 (de) Vorrichtung zur Herstellung von Keilbohlen
DE19509653C1 (de) Verfahren zur Herstellung von dünnen Brettern, insbesondere Parkettlamellen

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 DE FR SE

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AT DE FR SE

17P Request for examination filed

Effective date: 19920714

17Q First examination report despatched

Effective date: 19940301

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT DE FR SE

REF Corresponds to:

Ref document number: 112515

Country of ref document: AT

Date of ref document: 19941015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59103142

Country of ref document: DE

Date of ref document: 19941110

ET Fr: translation filed
EAL Se: european patent in force in sweden

Ref document number: 91101103.9

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

Ref country code: AT

Payment date: 20011228

Year of fee payment: 12

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: 20030129

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

Ref country code: DE

Payment date: 20090224

Year of fee payment: 19

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

Ref country code: SE

Payment date: 20090114

Year of fee payment: 19

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

Ref country code: FR

Payment date: 20090115

Year of fee payment: 19

EUG Se: european patent has lapsed
REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20100930

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

Ref country code: FR

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

Effective date: 20100201

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: 20100803

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 NON-PAYMENT OF DUE FEES

Effective date: 20100130