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EP0698455A1 - Dispositif d'amenée pour des machines à travailler le bois - Google Patents

Dispositif d'amenée pour des machines à travailler le bois Download PDF

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Publication number
EP0698455A1
EP0698455A1 EP95111221A EP95111221A EP0698455A1 EP 0698455 A1 EP0698455 A1 EP 0698455A1 EP 95111221 A EP95111221 A EP 95111221A EP 95111221 A EP95111221 A EP 95111221A EP 0698455 A1 EP0698455 A1 EP 0698455A1
Authority
EP
European Patent Office
Prior art keywords
driver
wooden
teeth
cutting
wood
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.)
Withdrawn
Application number
EP95111221A
Other languages
German (de)
English (en)
Inventor
Siegmar Gönner
Heinz-Hubert Braun
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 Maschinenfabrik Gatterlinck GmbH and Co KG
Original Assignee
Gebrueder Linck Maschinenfabrik Gatterlinck GmbH and Co KG
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 DE19944429789 external-priority patent/DE4429789A1/de
Application filed by Gebrueder Linck Maschinenfabrik Gatterlinck GmbH and Co KG filed Critical Gebrueder Linck Maschinenfabrik Gatterlinck GmbH and Co KG
Priority to EP95111221A priority Critical patent/EP0698455A1/fr
Publication of EP0698455A1 publication Critical patent/EP0698455A1/fr
Withdrawn legal-status Critical Current

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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
    • B27B25/00—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees
    • B27B25/04—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed chains or belts
    • 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
    • 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

Definitions

  • the invention relates to a driver for feeding smooth-surface wooden parts for woodworking machines, with a profiled driver surface lying against the wooden parts.
  • the feed forces to be applied in woodworking machines for feeding the wood parts to be worked depend crucially on the direction of the main cutting force during the machining process. If the wooden parts are processed with a driven, cutting tool, for example a saw or a milling cutter, then the cutting forces are applied by the tool drive; the feed force is much lower than the cutting force. Therefore, in such cases it is usually sufficient to apply the feed force by means of a frictional engagement between the feed device and the wooden part. Examples of such a non-positive transmission of the feed force can be found in endlessly rotating, driven feed belts made of rubber or a similar material, which are pressed onto the wooden parts by pressure rollers. The wooden parts can be guided on a roller bed with low friction; instead, it is also possible to guide the wooden parts between two such feed belts.
  • a frictional, non-positive transmission of the feed forces is not sufficient in those cases in which the main cutting force must also be transmitted with the feed force.
  • An example of this is the chipless separation of wooden slats from a wooden part by a standing knife, along which the wooden parts are conveyed.
  • the entire force required for the cutting process must be applied by the feed device.
  • the wooden parts must be positively carried along by the feed device.
  • the feed devices used for this grip the rear edge of the wooden parts and push them against the knife with the required cutting force.
  • a known driver of the type mentioned at the beginning (DE-U-92 14 929) has a roughly profiled metal plate as the pressure sole, and for the design of this profiling on mandrels of the type described above is referenced that penetrate the wood. Therefore, the wooden part can also deflect against the mandrels at least to a small extent under the transverse force that occurs during processing. The resulting dimensional deviations in the wood thickness are small; however, they already exceed the permissible tolerance range for certain wooden parts.
  • the object of the invention is therefore to design a driver for woodworking machines of the type mentioned in such a way that a very high feed force, not limited by the frictional conditions prevailing there, can be transmitted between a driver surface resting on the wooden parts and the wooden part, and in particular an evasion of the wooden part towards the driver during processing is prevented.
  • the driving surface has a toothing consisting of driving teeth and that wooden abutment surfaces for depth limitation are arranged in the vicinity of the driving teeth.
  • the toothing causes a positive engagement between the driver and the wooden part in the area of each individual driving tooth, so that a relatively high feed force can be transmitted to the driving surface provided with the toothing, which does not depend on the surface frictional relationships between the driving surface and the surface of the wooden parts .
  • the driving surface of which rests against the wooden parts to increase the frictional engagement is formed by a rubber pad, in addition to the possibility of transmitting significantly higher feed forces, there is also the significant advantage that the drivers or their on the Carrier surface adjacent to wooden parts is not elastic, so that the wooden parts cannot deflect against this carrier surface during the cutting process, which would lead to dimensional deviations of the separated wooden products.
  • the wood contact surfaces achieve a uniform limitation of the depth of penetration of the driving teeth, so that on the one hand an adequate, positive engagement on the wood surface is ensured, but on the other hand damage to the wood is avoided. It also prevents the wood from escaping during the cutting process in the direction of the driving surface. This prevents dimensional deviations of the wood product produced in this way, for example thickness deviations of a wooden lamella separated from a wooden part without cutting.
  • a wooden contact surface is then preferably arranged on each driver tooth, so that the depth of penetration is limited directly on each individual driver tooth.
  • a particularly advantageous use of the drivers according to the invention is provided for a plate chain for machines for cutting wood lamellae without cutting, which, as an endlessly rotating driven pressure chain, presses wooden parts against a wooden guide table and into them Feed direction to a knife separating the wooden slats promotes.
  • the conductivity of such machines is significantly influenced by the fact that the wooden parts are conveyed against the knife with the greatest possible force, so that it is necessary to exert a high feed force on the wooden parts. Since the wooden slats produced in this way are glued together, for example, to form parquet friezes, it is necessary to produce the wooden slats with a very narrow thickness tolerance so that a uniform contact pressure is guaranteed for all wooden slats. However, compliance with such a narrow thickness tolerance is only possible if a defined, constant contact pressure of the wooden slats against the wooden guide table is ensured. These two requirements can only be achieved with the measure according to the invention that a toothing is provided in the driving surface and that wooden contact surfaces are provided in the vicinity of the driving teeth for depth limitation.
  • the driver 1 has on its driver surface 4 facing the wooden part 2 a toothing 5 which consists of driver teeth 6.
  • a wooden contact surface 7 is arranged in the vicinity of the driving teeth 6, namely after each driving tooth 6.
  • a step is formed in each case in the conveying direction immediately behind each driver tooth 6, which serves as a wooden contact surface 7. If the driver teeth 6 penetrate into the wooden part 2 in the manner shown in FIG. 1 in order to take it positively, the wooden contact surfaces 7 come to rest on the outside of the wooden part 2 and thus limit the depth of penetration of the driver teeth 6.
  • the system of Wooden part 2 on the wooden contact surfaces 7 prevents the wooden part 2, particularly under the action of high lateral forces which occur during the machining process, from being able to move in the direction of the driver 1, which could cause a dimensional deviation of the wood product produced.
  • each driving tooth 6 namely between the leading wooden contact surface 7 and the following driving tooth 6, there is a recess 8 which is recessed relative to this wooden contact surface 7 and which serves to receive chips or other contaminants in order to ensure uniform contact of all the wooden contact surfaces 7 on the wooden surface guarantee.
  • all the recesses 8 are formed by transverse grooves 9, while the individual driving teeth 6 of each row are separated from one another by longitudinal grooves 10.
  • a different arrangement of the driving teeth 6 can also be selected, for example in diagonal rows, staggered or offset from one another.
  • the teeth 5 of the outer surface 4 of the drivers 1 formed by the driver teeth 6 establish a positive connection between the drivers 1 and the wooden parts 2, so that even very high feed forces can be transmitted in the direction of advance indicated by the arrow 3.
  • the respective penetration force and thus the depth of penetration of the driver teeth 6 would be determined by the force with which the wooden part 2 is pressed against the driver 1.
  • the dimensions of the driving teeth 6 are chosen so that they penetrate into the wooden part 2 with all the forces that occur during operation until its surface comes into contact with the wooden contact surface 7. This ensures a defined, constant pressure force of the wooden part 2 on its wooden guide surface.
  • the defined depth of penetration of the driving teeth 6 is chosen so that the surface is damaged a well-defined area. A penetration depth of 0.5 to 1 mm is preferably selected.
  • the number of driving teeth is chosen so large that, despite the small, limited depth of penetration, the transmission of a sufficiently high feed force to the wooden part 2 is ensured.
  • driving teeth 6 For example, with a driving surface of 150 x 120 mm, about 150 driving teeth 6 are provided. If the slight damage to the wooden surface in the finished product caused by the driving teeth 6 is not desired, it can be provided that the surface of the piston part 2 is subsequently planed in such a way that the area damaged by the driving teeth 6 is removed.
  • the wooden contact surface 7 is designed as an uninterrupted surface common to all driver teeth 6, from which the driver teeth 6 protrude.
  • the driving teeth 6 have the shape of cutting edges which extend, for example, transversely to the driving direction or conveying direction.
  • the exemplary embodiment according to FIGS. 5 and 6 differs from the exemplary embodiment according to FIGS. 1 and 5 only in that the driving teeth 6 have a pyramid shape.
  • the driver teeth 6 thus taper in a cutting plane lying transversely to the driving direction or conveying direction and also in a cutting plane lying in the driving direction to a tip 6a.
  • This embodiment has the particular advantage that the driver teeth 6 essentially leave the fibers lying on the surface of the wooden part 2 intact.
  • the driver teeth 6 tapering to a tip 6a only penetrate between the wood fibers, but without severing them. This results in a particularly gentle treatment of the wooden surface.
  • the driving teeth 6 can also be shaped differently, for example as conical tips.
  • driver 1 an embodiment of a driver 1 is shown, in which the pymid-shaped, pointed driver teeth 6 protrude from a common, uninterrupted surface, which forms the wooden contact surface 7.
  • toothed driver 1 can generally be used in devices for feeding wooden parts, where there is a need to transmit a high feed force despite essentially flat contact between the driver 1 and the wooden part 2 .
  • the use of the drivers in plate chains for machines for cutting wood lamellae without cutting is particularly advantageous.
  • the machine shown in a detail in FIG. 9 has a wooden guide table 11, to which the wooden parts 2 are fed by a feed device (not shown) (from the right in FIG. 9).
  • the wooden parts 2 come into engagement with a driven, endlessly rotating pressure chain arranged above the wooden guide table 11, which is designed as a plate chain 12.
  • the plate chain 12 presses the wooden parts 2 against the wooden guide surface 11 and conveys them in the feed direction indicated by the arrow 3 against an inclined knife arranged in the wooden guide table 11, which cuts a wooden lamella from the wooden parts 2 without cutting.
  • the plate chain 12 has link plates 13 which are articulated to one another in the manner of a link chain.
  • the plate chain 12 is deflected and driven via chain wheels.
  • the lower run of the plate chain 12 supported on its back by a group of pressure rollers 14.
  • the link plates 13 each have on their outer side 15, which faces the wooden parts 2 or the wooden guide table 11 in the region of the lower run, each have a driver plate 16 forming a driver 1.
  • the driver plates 16 are mounted on the associated link plate 13.
  • the driver plates 16 lying against the top of the wooden parts 2 are pressed back against the force of a compression spring 17, so that the outer surfaces 18 of the driver plates 16 facing the wooden parts 2 form a common pressing surface for the wooden parts 2 in this pressed-back state.
  • the driver plates 16 have teeth 5 in their outer surface 18 lying against the wooden part 2, which teeth consist of driver teeth, as has already been described.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Wood Veneers (AREA)
EP95111221A 1994-08-23 1995-07-18 Dispositif d'amenée pour des machines à travailler le bois Withdrawn EP0698455A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP95111221A EP0698455A1 (fr) 1994-08-23 1995-07-18 Dispositif d'amenée pour des machines à travailler le bois

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE4429790 1994-08-23
DE4429790 1994-08-23
DE4429789 1994-08-23
DE19944429789 DE4429789A1 (de) 1994-08-23 1994-08-23 Mitnehmer für Holzbearbeitungsmaschinen
EP94116004 1994-10-11
EP94116004 1994-10-11
EP95111221A EP0698455A1 (fr) 1994-08-23 1995-07-18 Dispositif d'amenée pour des machines à travailler le bois

Publications (1)

Publication Number Publication Date
EP0698455A1 true EP0698455A1 (fr) 1996-02-28

Family

ID=27436032

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95111221A Withdrawn EP0698455A1 (fr) 1994-08-23 1995-07-18 Dispositif d'amenée pour des machines à travailler le bois

Country Status (1)

Country Link
EP (1) EP0698455A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816029A3 (fr) * 1996-06-28 1998-11-04 Hans Hundegger Machine de taillage pour l'usinage des pièces de bois en barre

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE62398C (de) * TH. FRANCKE in Berlin, Schmidstr. 25 Vorschubvorrichtung für waagerechte Elfenbein-Sägegatter
US3356205A (en) * 1966-10-03 1967-12-05 Letson & Burpee Ltd Log conveyor
FR1530432A (fr) * 1966-04-14 1968-06-28 Socolest Valdoie Chaîne d'entraînement pour machines à bois
DE2109069B2 (fr) * 1970-03-03 1974-07-04 Oestbergs Fabriks Ab, Alfta (Schweden)
US4385650A (en) * 1981-04-10 1983-05-31 Weyerhaeuser Company Feed roll with spikes
EP0273172A1 (fr) * 1986-11-22 1988-07-06 Michael Weinig Aktiengesellschaft Rouleau convoyeur pour l'alimentation d'éléments en bois, en matériaux similaires ou en matière plastique
DE3420080C1 (de) 1984-05-29 1989-11-02 Konrad 8011 Faistenhaar Frey Abbundmaschine zum Bearbeiten von Brettern,Kanthoelzern und dergleichen
DE4201339C1 (fr) * 1992-01-20 1992-07-23 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De
DE9214929U1 (de) 1992-04-29 1993-01-07 Schmidler Maschinenbau GmbH, 8548 Heideck Transporteinrichtung für einen in Längsrichtung zu bewegenden Balken
DE9316399U1 (de) * 1992-11-03 1994-01-13 Schmidler Maschinenbau GmbH, 91180 Heideck Vorschubeinrichtung für einen Balken

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE62398C (de) * TH. FRANCKE in Berlin, Schmidstr. 25 Vorschubvorrichtung für waagerechte Elfenbein-Sägegatter
FR1530432A (fr) * 1966-04-14 1968-06-28 Socolest Valdoie Chaîne d'entraînement pour machines à bois
US3356205A (en) * 1966-10-03 1967-12-05 Letson & Burpee Ltd Log conveyor
DE2109069B2 (fr) * 1970-03-03 1974-07-04 Oestbergs Fabriks Ab, Alfta (Schweden)
US4385650A (en) * 1981-04-10 1983-05-31 Weyerhaeuser Company Feed roll with spikes
DE3420080C1 (de) 1984-05-29 1989-11-02 Konrad 8011 Faistenhaar Frey Abbundmaschine zum Bearbeiten von Brettern,Kanthoelzern und dergleichen
EP0273172A1 (fr) * 1986-11-22 1988-07-06 Michael Weinig Aktiengesellschaft Rouleau convoyeur pour l'alimentation d'éléments en bois, en matériaux similaires ou en matière plastique
DE4201339C1 (fr) * 1992-01-20 1992-07-23 Gebrueder Linck Maschinenfabrik "Gatterlinck" Gmbh & Co Kg, 7602 Oberkirch, De
DE9214929U1 (de) 1992-04-29 1993-01-07 Schmidler Maschinenbau GmbH, 8548 Heideck Transporteinrichtung für einen in Längsrichtung zu bewegenden Balken
DE9316399U1 (de) * 1992-11-03 1994-01-13 Schmidler Maschinenbau GmbH, 91180 Heideck Vorschubeinrichtung für einen Balken

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0816029A3 (fr) * 1996-06-28 1998-11-04 Hans Hundegger Machine de taillage pour l'usinage des pièces de bois en barre

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