EP1648668B1 - Procede et dispositif pour coupe de troncs d'arbre coniques - Google Patents

Procede et dispositif pour coupe de troncs d'arbre coniques Download PDF

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Publication number
EP1648668B1
EP1648668B1 EP04733809A EP04733809A EP1648668B1 EP 1648668 B1 EP1648668 B1 EP 1648668B1 EP 04733809 A EP04733809 A EP 04733809A EP 04733809 A EP04733809 A EP 04733809A EP 1648668 B1 EP1648668 B1 EP 1648668B1
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EP
European Patent Office
Prior art keywords
log
station
lateral
guide surface
profiled
Prior art date
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Expired - Lifetime
Application number
EP04733809A
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German (de)
English (en)
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EP1648668A1 (fr
EP1648668B8 (fr
Inventor
Jean Gunnar Bergvall
Hans Dietz
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
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Esterer WD GmbH and Co
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Publication of EP1648668A1 publication Critical patent/EP1648668A1/fr
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Publication of EP1648668B8 publication Critical patent/EP1648668B8/fr
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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
    • B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
    • B27B31/06—Adjusting equipment, e.g. using optical projection
    • 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

Definitions

  • the invention relates to a method for cutting conical, cone-shaped tree trunks in wood products, in which a tree trunk laterally flattened, and the model generated thereby centered and finally divided by sawing.
  • the invention further relates to an apparatus for cutting conical, cone-shaped tree trunks into wood products, comprising a first station for laterally trimming a tree trunk, a second station for centering the model created by the trimming, and a third station for sawing the model ,
  • a method and a device of the aforementioned type are known, for example from DE 32 44 393.
  • a conical tree trunk having a curved longitudinal axis is first brought to a lying position in which the plane of curvature of the tree trunk is vertical.
  • the tree trunk is then led with the thicker end ahead over a chipper, which attacks from the bottom of the tree trunk at this and creates a straight surface at the bottom.
  • the tree trunk then passes through a chipping station with two side chipper heads flattening the tree trunk on both sides.
  • the tree trunk is thereby conveyed straight ahead, ie, that its longitudinal axis is aligned parallel to the conveying direction.
  • approximately equal and equally shaped areas are machined on both sides of the conical tree trunk.
  • the depth of engagement in cutting is set to correspond to the width of the tree trunk at the thin end.
  • Behind the Zerspanerstation therefore remains a model, which is flattened from below and from the two sides in such a way that the width of the model from the front end to the back of the model is constant.
  • This model is then fed to a centering station, which centers the model and feeds it to a sawing station.
  • the sawing station exists from two circular saws, which laterally separate side boards.
  • a method for processing curved logs is known.
  • a tree trunk is conveyed ahead with the thin end, wherein the plane of curvature of the tree trunk is horizontal.
  • the tree trunk is conveyed on a roller conveyor and thereby scanned by means of lateral buttons, so that data on the shape of the tree trunk can be detected depending on its length.
  • a Zerspanersterein arranged downstream of the roller conveyor and a downstream of the Zerspanerstation Bandägestation be driven, in such a way that the laterally attacking Zerspanerköpfe and running through the wood bandsaw blades are adjusted in the lateral direction so that from the curved tree trunk boards with be sawn out optimum yield.
  • the invention is the object of developing a method and an apparatus of the type mentioned in such a way that the above-mentioned disadvantages are avoided.
  • first means are provided to flatten the tree trunk when flattening parallel to a surface line, whereby a lateral guide surface for the subsequent centering arises, to the longitudinal axis of the tree trunk by half the cone angle and second means for sawing the model in a direction parallel to the lateral guide surface.
  • the model is guided during centering with the guide surface on a fixed space guide.
  • This space-fixed guide preferably has first rollers.
  • This measure has the advantage that in this way already a stable guidance along the sawing direction available and the model can enter the subsequent sawing station immediately after centering.
  • the spatially fixed guide faces a spatially movable guide for a surface of the model opposite the lateral guide surface.
  • This measure is for a safe, two-sided leadership advantage because the spatially movable guide makes it possible to guide the model on the opposite side also safe or to press against the space-tight leadership, the spatially movable leadership is able to follow the areas, which have a variable or a constant distance from the conveying direction and thus from the space-fixed guide.
  • the spatially movable guide has second rollers, which are each provided with an adjusting device for an adjustment perpendicular to the direction of sawing.
  • the tree trunk is flattened before the side flattening on the top and on the bottom, for which purpose third means are provided.
  • side panels are first separated from the model during sawing, preferably in the third station already mentioned.
  • the model can be divided by circular saws or band saws.
  • 10 designates a total of a processing line for cutting conical tree trunks.
  • a tree trunk 12 is conveyed through the processing line 10.
  • the tree trunk 12 may be preprocessed, i. may initially have been provided with a flattened top and also a corresponding flattened bottom, as is well known.
  • the tree trunk 12 is now preferably conveyed ahead with its thinner end 14, wherein the longitudinal axis 15 is aligned parallel to the conveying direction 11.
  • the tree trunk 12 has a diameter d at the thinner end 14 and a diameter D at the rear, thick end.
  • the tree trunk 12 can also be conveyed ahead with the thicker end (the so-called "stick").
  • the Zerspanerstation 16 flattens the tree trunk 12 laterally, so that a model 17 is formed in which lateral areas 18a, 18b are removed and instead lateral guide surfaces 20a, 20b arise.
  • the Zerspanerkmü are adjusted so that the model 17 in the rear region has a diameter d 1 , which is greater than the diameter d of the thinner end 14 of the tree trunk 12. Consequently, the lateral regions 18a, 18b and the lateral guide surfaces 20a, 20b do not extend over the entire length of the model 17, but terminate at a distance from the thinner tapered end 14.
  • the model 17 now enters a centering station 22, which consists of two spaced apart d 1 roller tracks 24a, 24b.
  • the model 17 runs first with its non-machined section in the region of the thinner end 14 in the centering station 22, so that initially no centering takes place, because the diameter of the model 17 in this non-machined section is smaller than the distance of the Roller tracks 24a, 24b. Only when the model 17 with the lateral guide surfaces 20a, 20b in engagement with the roller tracks 24a, 24b of the centering station 22, an exact centering takes place.
  • the model 17 now passes through a circular saw 26, which may alternatively be a band saw.
  • the circular saw 26 generates saw cuts 27a, 27b at a distance from each other which corresponds to the distance d 1 less twice the width of the side boards 28a, 28b to be produced.
  • a main product 30, which may be further divided into beams or boards.
  • the side boards 28a, 28b produced at the end each have a length l 1 which is significantly shorter than the total length L 1 of the model 17 and thus of the tree trunk 12.
  • a tree trunk 42 is conveyed and processed in a conveying direction 41.
  • the tree trunk 42 has a cone angle ⁇ .
  • the tree trunk 42 is conveyed in the processing line 40 so that a lateral generatrix 43 of the tree trunk 42 is conveyed parallel to the conveying direction 41.
  • the tree trunk 42 is preferably supplied to the processing stations with the thinner end 44, in which case the tree trunk 42 may have been flattened in advance on the top in FIG. 2 and on the bottom side, as indicated by the reference numeral 49.
  • a conveying direction of the tree trunk 42 with the thicker end is also within the scope of the invention.
  • the longitudinal axis 45 of the tree trunk 42 is thus obliquely to the conveying direction 41 and although inclined by half the cone angle ⁇ / 2.
  • the log 12 is fed to a Zerspanerstation 46 or a sawing station, so that a model 47 is generated in which lateral portions 48 a, 48 b have been sawn or sawed off.
  • a Zerspanerstation 46 or a sawing station so that a model 47 is generated in which lateral portions 48 a, 48 b have been sawn or sawed off.
  • the lateral areas 48a, 48b are not the same.
  • the right-hand side region 48b extends in the conveying direction over the entire length of the model 47, while the left-hand region 48a in the conveying direction is substantially shorter in the longitudinal direction, but wider.
  • lateral guide surfaces 50a, 50b are formed, wherein the lateral guide surface 50b passes over the entire length of the model 47, whereas the lateral guide surface 50a does not.
  • the guide surfaces 50a, 50b are immediately available when the model 47 enters subsequent stations.
  • the model 47 now passes into a centering station 52, in which laterally a left roller conveyor 54a in the conveying direction and a right roller conveyor 54b are provided.
  • a left roller conveyor 54a in the conveying direction
  • a right roller conveyor 54b are provided.
  • the left roller conveyor 54a consists of individual rollers which are individually adjustable laterally by means of an associated adjusting device 55.
  • the model 47 is introduced into the circular saw 56 under contact with the spatially fixed guide of the roller conveyor 54b, whereby the right lateral guide surface 50b in the conveying direction is aligned parallel to the conveying direction 41.
  • the side boards 58a, 58b have a width l 2 and L 2, wherein L 2 under otherwise identical conditions is slightly shorter than L1. Nevertheless, the container produced in the procedure of FIG. 2 from a long side board 58b of length L 2 and a short side board 58a of length l 2 has a higher economic value than the container produced in the procedure of FIG. 1 with two short side boards 28a, 28b of the same length l 1 .
  • FIGS. 3A and 3B The conditions when processing and dividing the tree trunk 42 are again shown in principle in FIGS. 3A in a front view and in FIG. 3B in a plan view. 3C additionally shows the case of a tree trunk 42 'with a curved longitudinal axis 45'. It can be seen that the conditions are in principle the same as in the case of FIGS. 3A and 3B with an idealized tree trunk 42 with a straight longitudinal axis 45. In the case of a curved tree trunk 42 ', only care must be taken that the longer lateral guide surface 50b' is attached in the convex portion of the curvature.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Steroid Compounds (AREA)
  • Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)

Claims (20)

  1. Procédé pour coupe de troncs d'arbre coniques (12 ; 42), comprenant un angle de cône (α), en produits de bois (28, 30 ; 58, 60), dans lequel un tronc d'arbre (12 ; 42) est aplati latéralement, et le modèle (17 ; 47) ainsi produit est centré et enfin divisé par sciage, caractérisé en ce que le tronc d'arbre (42) éventuellement déjà ébauché (49) est aplati au cours de l'aplatissement parallèlement à une génératrice (43), une surface de guidage latérale (50b) étant produite pour le centrage suivant, qui est incliné par rapport à l'axe longitudinal (45) du tronc d'arbre (42) selon le demi-angle de cône (α/2), et en ce que le modèle (47) est scié dans une direction (41) parallèle à la surface de guidage latérale (50b).
  2. Procédé selon la revendication 1, caractérisé en ce que le modèle (47) au cours du centrage avec la surface de guidage (50b) est guidé sur un guidage stabilisé.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que le tronc d'arbre (42) est aplati avant l'aplatissement latéral sur la face supérieure et sur la face inférieure.
  4. Procédé selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que le tronc d'arbre (42') comprend une ligne médiane incurvée (45'), et au cours de l'aplatissement latéral sur une face concave, est pourvu d'une surface de guidage incurvée (50b') qui s'étend à angle droit par rapport au plan de courbure du tronc d'arbre.
  5. Procédé selon l'une ou plusieurs des revendications 1 à 4, caractérisé en ce qu'au cours du sciage, des planches de côté (58a, 58b) sont tout d'abord séparées du modèle (47).
  6. Procédé selon l'une ou plusieurs des revendications 1 à 5, caractérisé en ce que le modèle (47) est divisé par sciage circulaire.
  7. Procédé selon l'une ou plusieurs des revendications 1 à 5, caractérisé en ce que le modèle (47') est divisé par sciage à la scie à ruban.
  8. Procédé selon l'une ou plusieurs des revendications 1 à 7, caractérisé en ce que le tronc d'arbre (42) est aplati par coupe.
  9. Procédé selon l'une ou plusieurs des revendications 1 à 7, caractérisé en ce que le tronc d'arbre est aplati par tronçonnage.
  10. Dispositif de coupe de troncs d'arbre coniques (12 ; 42), comprenant un angle de cône (α), en produits de bois (28, 30 ; 58, 60), comprenant une première station (16) destinée à aplatir latéralement un tronc d'arbre (12 ; 42), comprenant une deuxième station (22 ; 52) destinée à centrer le modèle (17 ; 47) produit par l'aplatissement, et comprenant une troisième station (26 ; 56) destinée à débiter le modèle (17 ; 47), caractérisé en ce que des premiers moyens sont prévus pour aplatir le tronc d'arbre (42) au cours de l'aplatissement parallèlement à une génératrice (43), ce qui crée une surface de guidage latérale (50b) pour le centrage consécutif qui est inclinée par rapport à l'axe longitudinal (45) du tronc d'arbre (42) selon le demi-angle de cône (α/2), ainsi que des deuxièmes moyens pour scier le modèle (47) dans une direction (41) parallèle à la surface de guidage latérale (50b).
  11. Dispositif selon la revendication 10, caractérisé en ce que les deuxièmes moyens comprennent un guidage stabilisé pour la surface de guidage latérale (50b).
  12. Dispositif selon la revendication 11, caractérisé en ce que le guidage stabilisé comprend des premiers rouleaux (54b).
  13. Dispositif selon la revendication 11 ou 12, caractérisé en ce qu'au guidage stabilisé est opposé un guidage mobile dans l'espace pour une surface (50a, 50a') du modèle (47) faisant face à la surface de guidage latérale (50b).
  14. Dispositif selon la revendication 13, caractérisé en ce que le guidage mobile dans l'espace comprend deux rouleaux (54a), qui sont pourvus respectivement d'un dispositif de réglage (55) pour une direction de réglage perpendiculaire à la direction de sciage (41).
  15. Dispositif selon l'une ou plusieurs des revendications 10 à 14, caractérisé en ce que des troisièmes moyens sont prévus pour aplatir le tronc d'arbre (42) avant l'aplatissement latéral sur la face supérieure et sur la face inférieure.
  16. Dispositif selon l'une ou plusieurs des revendications 10 à 15, caractérisé en ce que la troisième station sépare tout d'abord les planches de bord (58a, 58b) du modèle (47).
  17. Dispositif selon l'une ou plusieurs des revendications 10 à 16, caractérisé en ce que la troisième station est conçue comme une station de sciage circulaire (56).
  18. Dispositif selon l'une ou plusieurs des revendications 10 à 16, caractérisé en ce que la troisième station est conçue comme une station de sciage à la scie à ruban.
  19. Dispositif selon l'une ou plusieurs des revendications 10 à 18, caractérisé en ce que la première station est conçue comme une station de coupe (46).
  20. Dispositif selon l'une ou plusieurs des revendications 10 à 18, caractérisé en ce que la première station est conçue comme une station de sciage
EP04733809A 2003-07-28 2004-05-19 Procede et dispositif pour coupe de troncs d'arbre coniques Expired - Lifetime EP1648668B8 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10335384A DE10335384A1 (de) 2003-07-28 2003-07-28 Verfahren und Vorrichtung zum Zerlegen von konischen Baumstämmen
PCT/EP2004/005402 WO2005021225A1 (fr) 2003-07-28 2004-05-19 Procede et dispositif pour decouper des troncs d'arbre coniques

Publications (3)

Publication Number Publication Date
EP1648668A1 EP1648668A1 (fr) 2006-04-26
EP1648668B1 true EP1648668B1 (fr) 2006-12-20
EP1648668B8 EP1648668B8 (fr) 2007-04-25

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EP04733809A Expired - Lifetime EP1648668B8 (fr) 2003-07-28 2004-05-19 Procede et dispositif pour coupe de troncs d'arbre coniques

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EP (1) EP1648668B8 (fr)
AT (1) ATE348695T1 (fr)
DE (2) DE10335384A1 (fr)
WO (1) WO2005021225A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1252445A (en) * 1915-09-15 1918-01-08 John Edvard Johansson Process for sawing logs.
US3456774A (en) * 1967-05-02 1969-07-22 Weyerhaeuser Co Method and apparatus for aligning and transferring logs
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
DE4016628A1 (de) * 1990-05-23 1991-11-28 Esterer Ag Maschf Verfahren zum erzeugen von nutzholz aus baumstaemmen oder modeln, und vorrichtung zum durchfuehren des verfahrens
DE4400600C2 (de) * 1994-01-12 1997-04-17 Dietz Hans Prof Dr Verfahren zum Zerlegen eines Baumstammes in allseitig bearbeitete Holzerzeugnisse

Also Published As

Publication number Publication date
WO2005021225A1 (fr) 2005-03-10
EP1648668A1 (fr) 2006-04-26
EP1648668B8 (fr) 2007-04-25
DE502004002394D1 (de) 2007-02-01
DE10335384A1 (de) 2005-03-17
ATE348695T1 (de) 2007-01-15

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