EP0650810B1 - Dispositif pour trancher du bois équarri en feuilles - Google Patents

Dispositif pour trancher du bois équarri en feuilles Download PDF

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Publication number
EP0650810B1
EP0650810B1 EP94114498A EP94114498A EP0650810B1 EP 0650810 B1 EP0650810 B1 EP 0650810B1 EP 94114498 A EP94114498 A EP 94114498A EP 94114498 A EP94114498 A EP 94114498A EP 0650810 B1 EP0650810 B1 EP 0650810B1
Authority
EP
European Patent Office
Prior art keywords
timber
diameter
cutting edge
roller
conveying direction
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
EP94114498A
Other languages
German (de)
English (en)
Other versions
EP0650810A1 (fr
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.)
Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Original Assignee
Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
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 Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik filed Critical Gebrueder Linck GmbH and Co KG Gatterlinck Maschinen Fabrik
Publication of EP0650810A1 publication Critical patent/EP0650810A1/fr
Application granted granted Critical
Publication of EP0650810B1 publication Critical patent/EP0650810B1/fr
Anticipated expiration legal-status Critical
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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
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/06—Cutting strips from a stationarily- held trunk or piece by a rocking knife carrier, or from rocking trunk or piece by a stationarily-held knife carrier; Veneer- cutting machines
    • 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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers
    • 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
    • B27L5/00—Manufacture of veneer ; Preparatory processing therefor
    • B27L5/002—Wood or veneer transporting devices

Definitions

  • the invention relates to a device for cutting wood lamellae from a squared timber, with a knife, the cutting edge of which runs obliquely at an angle to the conveying direction of the squared timber, and with a feed device which presses the squared timber against an opposite timber guide surface and conveys it in its longitudinal direction, the Feed device has a plurality of pressure rollers extending transversely to the wood conveying direction.
  • a squared timber preferably machined on all sides, is moved in its longitudinal direction along a timber guide surface.
  • the squared timber is pressed against the timber guide surface by the feed device.
  • the feed device usually has a plurality of pressure rollers which extend transversely to the direction of wood transport and which run directly or via an endlessly rotating one driven conveyor belt press the squared timber against the timber guide surface.
  • these pressure rollers are cylindrical with the same diameter throughout.
  • the knife separating the wooden slats is arranged on the wooden guide surface in such a way that its cutting edge is at a distance from the wooden guide surface which corresponds to the thickness of the wooden slats to be separated.
  • the cutting edge runs at an angle to the longitudinal direction of the wood, which is also the conveying direction.
  • the thickness of the wooden lamella cut off is not completely uniform. Since the pressure conditions change as the cutting process progresses, the severed wooden lamella has a somewhat smaller thickness in the area last cut, namely a triangular surface area at one of the rear corners of the wooden lamella, than in the rest of the area. This thickness deviation can amount to a few tenths of a millimeter and is therefore in most cases still within the permissible tolerance range of the individual wooden lamella. However, the thickness deviations of the individual wooden lamellae cut from a square timber add up to the respective rest of the square timber and lead to the last remaining lamellae having a greater thickness in a partial area, which is far outside the permissible tolerance range. The remaining lamella cannot therefore be used without extensive post-processing.
  • the feed device has pairs of driven rollers which are floatingly supported in the vertical direction, the two rollers of each pair from above and below against the square timber be pressed.
  • the respective lower rollers are designed in different lengths so that they only extend to the oblique cutting edge of the knife.
  • the pressure rollers which are separate from the feed device and which only press the squared timber against the wood guide surface, are designed with the same diameter throughout, so that the pressure conditions change as the cutting process progresses, as described above.
  • the object of the invention is therefore to design a device of the type mentioned at the outset in such a way that the different pressure conditions which occur during the cutting process are compensated for in such a way that the separated wooden lamellae have a uniform thickness, particularly in the last cut area.
  • each pressure roller decreases approximately above the cutting edge of the knife in a diameter step from a larger diameter on the side lying in front of the cutting edge in the conveying direction to a smaller diameter on the side lying behind the cutting edge in the conveying direction.
  • each pressure roller has two cylindrical roller sections which are connected to one another at the diameter step by a conical roller section. A sufficient but different contact pressure of the squared timber is achieved on both sides of the cutting edge.
  • the roller section of larger diameter is at least slightly conical, at least in the case of the pressure roller last passed by the squared timber, with a diameter increasing toward the end of the roller.
  • the device shown in simplified form in a side view in FIG. 1 is used, from a square timber 1, which is fed in the direction of arrow 2 (ie from right to left in FIG. 1), on the underside in each case a wooden lamella 3 using non-cutting technology to cut off.
  • a feed device 4 has an endlessly rotating conveyor belt 5 which is driven and runs over deflection rollers 6 and 7.
  • the conveyor belt 5 is pressed against the top of the squared timber 1 by a plurality of pressure rollers 8 extending transversely to the conveying direction and takes the squared timber 1 in its longitudinal direction.
  • the pressure rollers 8 press the square timber 1 through the conveyor belt 5 against a horizontal timber guide surface 9.
  • the wooden lamella 3 in which the wooden lamella 3 is cut off on the underside of the square timber 1, the wooden lamella 3 can also be cut off on one of the side surfaces or on the upper side of the square timber 1.
  • a knife 10 is arranged on the wood guiding surface 9, the cutting edge 11 of which is arranged at an acute angle a to the longitudinal direction of the wood and thus to the conveying direction.
  • the cutting edge 11 lies at a distance approximately corresponding to the thickness of the wooden lamella 3 to be separated, above the wooden guide surface 9 and parallel to it.
  • a counter pressure bar 12 is arranged below the cutting edge 11, the pressure edge 13 of which is parallel to the cutting edge 11 runs and presses against the wooden lamella 3 to be separated from below in order to achieve a clean cut. Both the knife 10 and the counter pressure bar 12 are arranged adjustable.
  • a lateral guide bar 14 is arranged on the side edge of the wooden guide surface 9 opposite the knife 10 and extends in the conveying direction essentially over the entire length of the knife 10.
  • Each of the pressure rollers 8 extending transversely to the wood conveying direction has a diameter step 15 at which the diameter of the pressure roller 8 decreases from a larger diameter in a first roller portion 16 to a smaller diameter in a roller portion 17.
  • the diameter step 15 of the individual pressure rollers 8 is approximately above the cutting edge 11 of the knife 10; the roller section 16 with a larger diameter is arranged on the side lying in front of the cutting edge 11 in the conveying direction, while the roller section 17 with a smaller diameter is arranged on the side lying behind the cutting edge 11 in the conveying direction.
  • a greater contact pressure is exerted on the square timber 1 in the area which rests on the wooden guide surface 9 and has not yet come into engagement with the cutting edge 11 of the knife 10.
  • the two cylindrical roller sections 16, 17 are connected to one another at the diameter step 15 by a conical roller section 18.
  • the two roller sections 16 and 17 are designed, for example, with a diameter of 62 or 60 mm, so that the diameter step 15 bridges a difference in diameter of 2 mm.
  • the tapered roller section 18 runs for example at 45 ° and has a rounded edge at the transition to the larger roller section 16.
  • the roller section 17 with a smaller diameter extends over most of the length of the pressure roller 8'.
  • the roller section 16 ′ with a larger diameter lying beyond the diameter step 15 is not cylindrical in this case, but is slightly conical with a diameter that increases toward the end of the roller. This results in an increased contact pressure at the edge of the square timber 1.

Landscapes

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

Claims (3)

  1. Dispositif pour trancher sans copeaux des lamelles de bois (3) dans du bois équarri (1), comportant un couteau (10), dont l'arête de coupe (11) s'étend en oblique en faisant un angle (a) avec la direction de transport du bois équarri (1), et un dispositif d'avancement (4), qui presse le bois équarri (1) contre une surface guide-bois (9) en regard et le transporte dans sa direction longitudinale, le dispositif d'avancement (4) comportant plusieurs rouleaux presseurs (8, 8') s'étendant transversalement à la direction de transport du bois, caractérisé en ce que le diamètre de chaque rouleau presseur (8, 8') se réduit, à peu près au-dessus de l'arête coupante (11) du couteau (10), dans un gradin de diamètre (15) en passant d'un grand diamètre sur le côté qui se situe devant l'arête coupante (11) dans la direction de transport à un diamètre plus petit sur le côté qui se situe derrière l'arête coupante (11) dans la direction de transport.
  2. Dispositif selon la revendication 1, caractérisé en ce que chaque rouleau presseur (8) présente deux sections cylindriques (16, 17) qui sont reliées l'une à l'autre, sur le gradin de diamètre (15), par une section de rouleau conique (18).
  3. Dispositif selon la revendication 1, caractérisé en ce que la section de rouleau (16') de plus grand diamètre est conformée de manière légèrement conique avec son diamètre qui s'agrandit vers la fin du rouleau (8), au moins sur le rouleau qui est parcouru en dernier lieu par le bois équarri (1).
EP94114498A 1993-11-03 1994-09-15 Dispositif pour trancher du bois équarri en feuilles Expired - Lifetime EP0650810B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4337430A DE4337430C1 (de) 1993-11-03 1993-11-03 Vorrichtung zum spanlosen Abschneiden von Holzlamellen von einem Kantholz
DE4337430 1993-11-03

Publications (2)

Publication Number Publication Date
EP0650810A1 EP0650810A1 (fr) 1995-05-03
EP0650810B1 true EP0650810B1 (fr) 1997-02-26

Family

ID=6501645

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94114498A Expired - Lifetime EP0650810B1 (fr) 1993-11-03 1994-09-15 Dispositif pour trancher du bois équarri en feuilles

Country Status (5)

Country Link
EP (1) EP0650810B1 (fr)
JP (1) JPH07195306A (fr)
AT (1) ATE149111T1 (fr)
CA (1) CA2134177A1 (fr)
DE (2) DE4337430C1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT404107B (de) * 1996-06-13 1998-08-25 Rupert Hirnsperger Vorrichtung bzw. verfahren zum spanlosen schneiden von holzlamellen und brettern
DE102018111307A1 (de) * 2018-05-11 2019-11-14 Gaugler & Lutz Ohg Vorrichtung zur Bearbeitung eines oder mehrerer blockförmiger Werkstücke

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029752C1 (fr) * 1990-09-20 1991-08-01 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De
DE4038486A1 (de) * 1990-12-03 1992-06-04 Linck Masch Gatterlinck Vorrichtung zur schneidenden erzeugung von duennen brettern

Also Published As

Publication number Publication date
ATE149111T1 (de) 1997-03-15
DE4337430C1 (de) 1994-09-29
EP0650810A1 (fr) 1995-05-03
CA2134177A1 (fr) 1995-05-04
JPH07195306A (ja) 1995-08-01
DE59401855D1 (de) 1997-04-03

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