EP0328605B1 - Cylindre d'alimentation pour dispositifs de traitement de troncs d'arbres - Google Patents

Cylindre d'alimentation pour dispositifs de traitement de troncs d'arbres Download PDF

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Publication number
EP0328605B1
EP0328605B1 EP88907229A EP88907229A EP0328605B1 EP 0328605 B1 EP0328605 B1 EP 0328605B1 EP 88907229 A EP88907229 A EP 88907229A EP 88907229 A EP88907229 A EP 88907229A EP 0328605 B1 EP0328605 B1 EP 0328605B1
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EP
European Patent Office
Prior art keywords
feed roller
roller according
jacket
fixing portion
entraining
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EP88907229A
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German (de)
English (en)
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EP0328605A1 (fr
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Hans Wahlers
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Individual
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Priority to AT88907229T priority Critical patent/ATE80828T1/de
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    • 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
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor

Definitions

  • the invention relates to a feed roller for a device for processing tree trunks, in particular for delimbing and, if necessary, sectioning, with an elastic jacket in which a plurality of drivers arranged at a distance from one another are arranged, each in the jacket with a pin-shaped fastening section are held, which has at its outer end section a support flange located in the area of the lateral surface, from which a driving cam protrudes freely beyond the outer surface.
  • feed rollers In order to achieve a satisfactory engagement between the feed rollers and a tree trunk to be processed, numerous designs of feed rollers have become known.
  • the feed rollers of larger devices built on forwarders or other special vehicles have been equipped with feed rollers, which are basically car or Truck wheels are the same, i.e. they are provided with a relatively coarse profile on their outer surface and / or are fitted with snow chains, if necessary, in order to ensure a sufficiently large adhesive effect between the feed rollers and a tree trunk, especially in damp weather conditions, some of them with large feed rollers hollow chambers have also been provided in order to give the feed rollers the greatest possible flexibility with corresponding adaptation to the forward-moving tree trunk.
  • feed rollers which have partially axial grooves on their outer surface, in which protruding chains are arranged over the outer surface in order to reinforce the frictional engagement between the rollers and the tree trunk by a positive fit.
  • protruding chains are arranged over the outer surface in order to reinforce the frictional engagement between the rollers and the tree trunk by a positive fit.
  • a device for advancing tree trunks which essentially consists of a feed roller, on the circumference of which tangentially movable plates with tips or spikes are attached.
  • the disadvantage of this feed roller is that it is too expensive to manufacture and construct.
  • a corrugated roller for feeding workpieces made of wood is also known, which is used in woodworking machines, such as planing machines.
  • the problem solved with this invention consists essentially of an adaptation to workpieces of different thicknesses to be planed, which is why this document does not provide any information for the solution of the problem to let.
  • an elastic drive element is also known, which, however, works without positive engagement in the workpiece to be advanced, so that it cannot be used for feeding heavy logs with their irregularly shaped surface.
  • feed rollers are not suitable for devices of medium size and in particular so-called small processors of the type of crane or add-on processors, which are used with increasing scope especially when there is not enough space available for large processors, so that predominantly with these devices Steel rollers with different surface structures are used.
  • the feed rollers known for such devices are provided on their jacket with tapered, beveled or corrugated driving cams.
  • driving cams do not engage through the bark in the wood underneath, since in the case of rigid steel rollers only a relatively small number is inevitable of driving cams is to be brought into engagement with the surface of a tree trunk.
  • the present invention is therefore based on the object to improve the feed rollers of the type described in the introduction, while avoiding their disadvantages, in particular in that, on the one hand, a sufficiently large feed force required for the refurbishment is to be generated or largely slip-free to be transferred to a tree trunk, and on the other hand however, bark is not pressed into the wood layer under the bark.
  • the solution to this problem is characterized in that the length of the driving cams is in each case greater than their width measured at right angles to their length, that the driving cams are wedge-shaped in a cross section running at right angles to their longitudinal extension and taper towards the outer free end, and that the driving cams run in their longitudinal direction substantially parallel to the axis of rotation of the drive roller.
  • the driving cams which are preferably provided with a cutting edge at their free outer end, penetrate into the bark of a tree trunk to be moved forward, so to speak, so that no bark material is pressed into the wood lying under the bark. Rather, when the driving cams penetrate further, the bark material is displaced to the side (that is, in the longitudinal direction of the tree trunk).
  • the driving cams due to the design and parallel arrangement of the driving cams to the axis of rotation of the feed roller, there is a relatively large engagement surface with the bark of the tree trunk in question with correspondingly low pressures, with the required wedge-shaped design of the driving cams also requiring Strength is given.
  • the support flange is conical or rounded on its underside.
  • the top of the support flange of a driver can also preferably be rounded off in order to be able to adapt to the contour of the tree in question in a particularly advantageous manner during the feed operation.
  • the pin-shaped fastening sections of the drivers can be cylindrical or else polygonal.
  • the pin-shaped fastening section can be non-circular at least on its inner end section facing away from the driving cam and preferably be flattened, preferably in such a way that it inner end portion is wider than the remaining portion of the fastening portion.
  • a most preferred embodiment of the present invention is that the hardness of the elastic sheath in the outer circumferential section penetrated by the drivers is considerably greater than in the inner shroud section, the Shore hardness in the outer circumferential section of the sheath being 60 and more, during the inner jacket section is considerably more elastic.
  • This configuration results in an excellent firm hold of the drivers in the roller shell and yet overall a relatively large elasticity in the radial direction, despite the stresses occurring, so that the roller shell can adapt very strongly to the contour of the tree trunk in question when the feed rollers used in pairs are pressed against each other. The result of this is that a large number of drivers engage the tree trunk, so that the load on the individual driver is correspondingly low and there is no slippage even with large feed forces.
  • the roll shell In order to achieve the different elasticity of the roll shell, it is preferably provided that it consists of two firmly connected annular layers of different elasticity, which of course are firmly connected to one another.
  • the drivers or their driving cams are not of the same design. Rather, the radial height of the driving cams is different in different axial sections of the feed roller. For example, in the case of two feed rollers which are arranged at a lateral distance and whose axes of rotation run vertically, the radial height of the driving cams at the lower end section of a feed roller can be smaller than at the section above it.
  • Embodiments of the feed roller according to the invention are also advantageous, in which the height of the driving cams increases either in stages or in sections or also continuously, the height of a driving cam, for example, on an end section of the feed roller, which is lower in the case of vertically arranged feed rollers, only 1 to 2 mm and at the other - upper - end section 10 to 20 mm or more.
  • Such an embodiment is highly advantageous because in a tree trunk with a relatively small diameter, which has a correspondingly thin bark, only the drivers located at the lower end section of the feed roller with their driving cams come into engagement with the bark of the tree trunk, so that this It must be ensured that the driving cams essentially only engage in the bark of the tree trunk, even with thinner tree trunks.
  • the driving cams located in the middle and upper section of the feed roller come into engagement with the tree trunk. Since a thicker tree trunk also has a correspondingly thicker bark, the driving cams can therefore have a correspondingly greater radial height there without reaching into the wood located under the bark. In this way, the larger feed forces required in the case of thicker tree trunks can therefore be applied in a highly expedient manner or can be transferred to the tree trunk.
  • receiving sleeves are arranged in the jacket for the respective receiving of the fastening section of a driver, the length of a receiving sleeve being less than that Length of the fastening section can be. If the drivers are held at their inner end section in receptacles that are preferably made of plastic, but can also be made of metal, for example, there is no considerable heating.
  • the drivers are provided on their fastening section facing away from the driving cam with at least one groove-shaped recess running essentially transversely to their longitudinal axis, which is preferably designed as an annular groove and in a most preferred embodiment of the present invention between the support flange and one with Axial distance to the support flange formed retaining flange can be arranged, the diameter of which is greater than the diameter of the remaining fastening section.
  • the transition from the support flange to the annular groove and from the retaining flange of the annular groove or the like is conical. formed, that is, bevelled, since these bevels facilitate insertion on the one hand and, on the other hand, lead to a particularly intimate holder in the inserted state.
  • the fastening section of the drivers is each non-circular (for example and preferably oval).
  • FIGS. 1 and 2 show the part of a device for processing tree trunks essential in the present context in a simplified representation, namely the area of their feed rollers 1, the remaining parts of the device being omitted for the sake of clarity and only the one feed roller 1 of the feed roller pair 1, 1 is shown completely, since the other feed roller 1 is of identical design.
  • Each feed roller 1 has a hub 2, which is connected to a drivable drive shaft, not shown, and is connected via a flange 3 to a cylindrical steel core 4, on the outside of which a ring-shaped jacket made of an elastic material, such as rubber, designated 5 overall or an elastic plastic is attached.
  • the jacket 5 consists of two interconnected layers 5 'and 5 ⁇ , the Shore hardness of the outer annular layer 5' 60 to 65 and being considerably greater than the hardness of the inner layer 5 ⁇ , so that the latter is considerably more elastic than that outer peripheral layer 5 'of the jacket 5th
  • a plurality of mutually arranged axial spacing a and circumferential spacing B are arranged 6, each of which is held by a pin-shaped fastening section 7 in the jacket 5, which has a support flange 9 located in the area of the jacket surface 8 at its outer end section (see FIG. 3, 4), of which a driving cam 10 projects freely beyond the outer surface 8.
  • the length 1 of the driving cams 10 is larger than theirs width measured at right angles to it b.
  • the driving cams 10 of the drivers 6 each have a wedge shape in a cross section running at right angles to their longitudinal extent, the apex angle ⁇ being approximately 30 °.
  • the driving cams 10 are each provided with a cutting edge 11.
  • the drivers 6 made of steel are arranged essentially radially in the casing 5 of each feed roller 1, in such a way that the drive cam 10 of each driver 6 with its longitudinal direction is essentially parallel to the axis of rotation 12 of the feed rollers 1 runs.
  • the length L of the fastening section 7, which is preferably about four to eight times the diameter d, is 4 cm in the present case with a diameter d of 6 mm, the diameter of the support flange 9 being twice the diameter of the pin-shaped fastening section 7.
  • the support flange 9 of the driver 6 is in each case tapered conically on its underside 13, so that no bark material can get stuck under the support flange during operation.
  • the top 14 is rounded so that it can adapt to a log 15 to be transported during operation.
  • each driver 6 is flattened and has a greatest width c which is greater than the diameter d of its cylindrical section in order to improve the hold of the drivers 6 in the jacket 5 during operation.
  • the drivers 6 introduced into the jacket 5 of each feed roller 1 in such a way that the support flange 9 lies in the area of the jacket surface 8.
  • the drivers 6 are held firmly at their portion of the fastening cam 7 adjacent to the driving cam 10 in the relatively hard outer peripheral layer 5 'of the jacket 5, while the flattened, widened end section 16 lies in the considerably more elastic layer 5' of the jacket.
  • the two feed rollers 1, 1 are at a greater mutual distance than during feed operation, the mutual distance being A. If the tree trunk 15 placed on a support 17 of the device is in the region of the feed rollers 1, 1, these are pressed against the tree trunk 15 transversely to their axes of rotation 12. For this purpose, at least one of the two feed rollers 1, 1 can be displaced in the radial direction relative to the other feed roller 1. Due to the elasticity of the jacket 5 - in particular the relatively large elasticity of the peripheral layer 5 ⁇ - there is a deformation of the jacket 5, as shown in Fig. 1, so that a larger number of drivers 6 with the bark 15 ' of the tree trunk 15 comes into engagement.
  • the drivers 6 are not only held well in the jacket 5 during feed operation, but also do not move excessively in the circumferential direction, so that an astonishingly long service life can be achieved. Nevertheless, as stated above, due to the two-layer design of the jacket 5, a considerable deformation of the jacket 5 in the radial direction is possible in order to be able to engage a larger number of drivers 6 during feed operation with the bark 15 'of the tree trunk 15 to be processed.
  • FIG. 5 shows a partial longitudinal section through a variant of a feed roller 1, in which the radial height h of the driving cams 10 at the lower end section of the feed roller 1 is smaller than at the section above it.
  • the height h of the driving cams 1O of the two lowest rows of driver is only 2 mm, while the height h of the driving cams 1O at the upper end section of the feed roller 1 is 18 mm.
  • the height h of the driving cams 10 can either increase gradually or in sections in the axial direction or else continuously.
  • Such an embodiment has the great advantage that, even when processing a tree trunk 15 with a relatively small diameter, the driving cams 10 essentially only engage in the bark of the tree trunk 15, and that due to tree trunks 15 with a larger diameter which have a correspondingly thicker bark the greater heights of the driving cams 1O, the necessary feed forces are also to be transmitted to the tree trunk if the driving cams 1O only engage in the bark thereof.
  • FIGS. 3 and 4 show a variant of a driver 6, which differs from the driver according to FIGS. 3 and 4 first of all in that a groove-shaped recess 18 formed as an annular groove is provided on its fastening section 7 below the support flange 9 lies between the support flange 9 and an axially spaced retaining flange 19, the diameter of which is larger than the corresponding cross-sectional dimension of the remaining fastening section 7.
  • transition 18 'from the support flange 9 to the annular groove 18 is beveled conically.
  • transition 18 ⁇ between the holding flange 19 and the annular groove 18 is also formed, the holding flange 19 also being conical to the remaining part of the fastening section 7.
  • fastening section 7 is non-circular, namely approximately oval, whereby rotation about the longitudinal axis can be prevented even better.
  • the jacket surface 8 is indicated in FIG. 6 to show how the driver 6 is arranged in the jacket.
  • the lower end section of the fastening section 7 is arranged in a receiving bushing 20, the free cross section of which corresponds to the contour of the lower end section of the fastening section 7 (see FIG. 9).
  • the drivers 6 are not arranged with their lower end section directly in the rubber of the jacket 5, but in each case in a plastic one existing receptacle 2O, the length of which in the illustrated embodiment is less than the total length of the fastening section 7, and which is provided on the outside with two mutually opposite ribs 21, which further improve a positive mounting of the receptacle 2O in the elastic material of the jacket 5.
  • the feed rollers according to the invention are particularly suitable for processors of medium and small size.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Mechanical Engineering (AREA)
  • Rolls And Other Rotary Bodies (AREA)

Abstract

Un cylindre d'alimentation pour des dispositifs de traitement, notamment d'émondage et de fragmentation, de troncs d'arbres, comprend une enveloppe extérieure élastique pourvue d'une pluralité d'entraîneurs mutuellement espacés sur la surface de l'enveloppe et retenus dans l'enveloppe par une section de fixation allongée qui comprend à son extrémité extérieure une bride de support au niveau de la surface de l'enveloppe. Des ergots d'entraînement dont la longueur est supérieure à la largeur font saillie sur la surface de l'enveloppe, ont une section transversale dans le sens perpendiculaire à leur longueur en forme de V et s'étendent essentiellement paralèllement, dans le sens de leur longueur, à l'axe de rotation du cylindre d'entraînement.

Claims (41)

  1. Cylindre d'avance pour dispositif de dégrossissage de troncs d'arbre, en particulier pour l'émondage et le déchiquetage, muni d'une enveloppe élastique, dans laquelle sont disposés une pluralité d'organes d'entrainement, répartis avec un espacement mutuel sur la surface d'enveloppe, maintenus respectivement dans l'enveloppe à l'aide d'une section de fixation en forme de tige, qui présente sur son extrémité finale extérieure un rebord d'appui situé dans la zone de la surface d'enveloppe, d'où un ergot d'entrainement fait saillie au-dessus de la surface d'enveloppe, caractérisé en ce que la longueur (l) de chaque ergot d'entraînement (10) est supérieure à sa largeur (b); les ergots d'entrainement (10) sont, chacun, en section s'étendant perpendiculairement à leur longueur, de forme en coin allant en rétrécissant vers l'extrémité libre extérieure; et les ergots d'entrainement (10) s'étendent en direction longitudinale sensiblement parallèlement à l'axe de rotation (12) du cylindre d'avance (1).
  2. Cylindre d'avance selon la revendication 1, caractérisé en ce que les ergots d'entraînement (10) présentent chacun sur leur extrémité extérieure libre une arête de coupe (11).
  3. Cylindre d'avance selon la revendication 1 ou 2, caractérisé en ce que l'angle au sommet (α) des ergots d'entrainement (10) est d'à peu près 30°.
  4. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le rebord d'appui (9) d'un organe d'entraînement (6) s'effile en forme de cône sur sa face inférieure.
  5. Cylindre d'avance selon l'une ou plusieurs des revendications 1 à 3, caractérisé en ce que le rebord d'appui (9) d'un organe d'entraînement (6) est arrondi sur sa face inférieure.
  6. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le rebord d'appui (9) d'un organe d'entraînement (6) est arrondi sur sa face supérieure (14).
  7. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la section de fixation (7) en forme de tige d'un organe d'entraînement (6) est non-circulaire au moins sur sa section d'extrémité intérieure (16) opposée à l'ergot d'entraînement (10).
  8. Cylindre d'avance selon la revendication 7, caractérisé en ce que la section de fixation (7) en forme de tige d'un organe d'entraînement (6) est cylindrique et aplatie sur sa section d'extrémité intérieure (16).
  9. Cylindre d'avance selon la revendication 8, caractérisé en ce que la section d'extrémité intérieure (16) de la section de fixation (7) d'un organe d'entraînement (6) est plus large que la partie restante de la section de fixation (7).
  10. Cylindre d'avance selon la revendication 8 ou 9, caractérisé en ce que la section d'extrémité intérieure (16) aplatie d'un organe d'entraînement (6) s'étend sensiblement parallèlement à l'axe longitudinal de l'ergot d'entraînement (10).
  11. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la longueur (L) de la section de fixation (7) est à peu près de quatre à huit fois son diamètre (d), respectivement sa largeur.
  12. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que le diamètre du rebord d'appui (9) d'un organe d'entraînement (6) est à peu près le double du diamètre (d), respectivement la largeur de la section de fixation (7) en forme de tige.
  13. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que les organes d'entraînement (6) sont disposés sensiblement radialement au cylindre d'avance (1).
  14. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que les organes d'entraînement (6) sont en acier.
  15. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la dureté de l'enveloppe élastique (5) dans la section périphérique extérieure (5′), traversée par les organes d'entraînement (6), est notablement plus grande que dans la section intérieure d'enveloppe (5˝).
  16. Cylindre d'avance selon la revendication 15, caractérisé en ce que la dureté Shore dans la section périphérique extérieure (5′) de l'enveloppe (5) est d'à peu près 60 à 65.
  17. Cylindre d'avance selon la revendication 15 ou 16, caractérisé en ce que l'enveloppe (5) est composée de deux couches annulaires (5′,5˝) d'élasticités différentes, reliées rigidement entre elles.
  18. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'enveloppe (5) est en caoutchouc.
  19. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que l'enveloppe (5) est en matière synthétique.
  20. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que la hauteur radiale (h) de l'ergot d'entraînement (10) est différente dans les différentes sections axiales du cylindre d'avance (1).
  21. Cylindre d'avance selon la revendication 20, caractérisé en ce que la hauteur (h) des ergots d'entraînement (10) augmente graduellement.
  22. Cylindre d'avance selon la revendication 20, caractérisé en ce que la hauteur (h) des ergots d'entrainement (10) augmente de façon continue.
  23. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que, sur la section d'extrémité inférieure du cylindre d'avance (1), la hauteur (h) des ergots d'entrainement (10) est d'à peu près 1 à 2 mm.
  24. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que, sur la section d'extrémité supérieure du cylindre d'avance (1) , la hauteur (h) des ergots d'entraînement (10) est d'à peu près 10 à 20 mm.
  25. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que les organes d'entraînement (6) sont pourvus sur leur section de fixation (7) d'au moins un évidement (18) en forme de gorge, qui s'étend pratiquement transversalement à leur axe longitudinal.
  26. Cylindre d'avance selon la revendication 25, caractérisé en ce qu'un évidement (18) en forme de gorge est réalisé sous forme de gorge annulaire.
  27. Cylindre d'avance selon la revendication 26, caractérisé en ce qu'un évidement (18) en forme de gorge est réalisé entre le rebord d'appui (9) et un rebord de maintien (19) réalisé à une certaine distance axiale de celui-ci, dont le diamètre de l'évidement est supérieur aux dimensions de la sections transversale de la partie restante de la section de fixation (7).
  28. Cylindre d'avance selon la revendication 27, caractérisé en ce que la section de transition (18′;18˝) allant du rebord d'appui (9) et/ou du rebord de maintien (19) à la gorge annulaire (18) est de forme conique, ou analogue.
  29. Cylindre d'avance selon l'une ou plusieurs des revendications 1 à 7 et 9 à 28, en particulier selon l'une des revendications 25 à 28, caractérisé en ce que la section de fixation (7) de chacun des organes d'entraînement (6) est non-circulaire.
  30. Cylindre d'avance selon la revendication 29, caractérisé en ce que la section de fixation (7) des organes d'entraînement (6) est ovale.
  31. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, en particulier selon l'une ou plusieurs des revendications 25 à 30, caractérisé en ce que des douilles de logement (20) sont disposées dans l'enveloppe (5), en vue de loger chacune des sections de fixation (7) d'un organe d'entrainement (6).
  32. Cylindre d'avance selon la revendication 31, caractérisé en ce que la longueur d'une douille de logement (20) est inférieure à la longueur de la section de fixation (7) de l'organe d'entraînement (6) correspondant.
  33. Cylindre d'avance selon la revendication 31 ou 32, caractérisé en ce que les douilles de logement (20) sont en métal.
  34. Cylindre d'avance selon la revendication 31 ou 32, caractérisé en ce que les douilles de logement (20) sont en matière synthétique.
  35. Cylindre d'avance selon l'une ou plusieurs des revendications 31 à 34, caractérisé en ce que les douilles de logement (20) sont pourvues sur leur face extérieure d'au moins une nervure (21) s'étendant sensiblement en direction longitudinale.
  36. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce que sur au moins une face frontale (35,36) est disposée une plaque de butée (30;30′) sensiblement annulaire, qui recouvre au moins partiellement l'enveloppe élastique (5).
  37. Cylindre d'avance selon la revendication 36, caractérisé en ce que la plaque de butée (30′) ne recouvre l'enveloppe élastique que sur sa section de bordure extérieure (5′).
  38. Cylindre d'avance selon la revendication 36, caractérisé en ce que la plaque de butée (30) recouvre l'enveloppe élastique (5=5′+5˝) pratiquement entièrement.
  39. Cylindre d'avance selon l'une des revendications 36 à 38, caractérisé en ce qu'une plaque de butée est disposée sur les deux faces (35,36).
  40. Cylindre d'avance selon l'une des revendications 36 à 39, caractérisé en ce qu'une plaque de butée (30;30′) est reliée rigidement à un rebord (31) et/ou à la deuxième plaque de butée (30;30′) éventuellement existante.
  41. Cylindre d'avance selon l'une ou plusieurs des revendications précédentes, caractérisé en ce qu'au moins un support de traction (34) composé en un tissu textile, en câbles d'acier, ou analogue, à l'aide duquel les efforts axiaux sont supportés ou annulés, est encastré dans l'enveloppe élastique (5).
EP88907229A 1987-08-22 1988-08-22 Cylindre d'alimentation pour dispositifs de traitement de troncs d'arbres Expired - Lifetime EP0328605B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88907229T ATE80828T1 (de) 1987-08-22 1988-08-22 Vorschubwalze fuer eine vorrichtung zum bearbeiten von baumstaemmen.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3728069 1987-08-22
DE3728069 1987-08-22
DE19873730057 DE3730057C1 (de) 1987-08-22 1987-09-08 Vorschubwalze fuer eine Vorrichtung zum Bearbeiten von Baumstaemmen
DE3730057 1987-09-08

Publications (2)

Publication Number Publication Date
EP0328605A1 EP0328605A1 (fr) 1989-08-23
EP0328605B1 true EP0328605B1 (fr) 1992-09-23

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP88907229A Expired - Lifetime EP0328605B1 (fr) 1987-08-22 1988-08-22 Cylindre d'alimentation pour dispositifs de traitement de troncs d'arbres

Country Status (3)

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EP (1) EP0328605B1 (fr)
DE (1) DE3730057C1 (fr)
WO (1) WO1989001854A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE59002507D1 (de) * 1989-02-21 1993-10-07 Hans Wahlers Vorschubwalze für eine Vorrichtung zum Bearbeiten von Baumstämmen.
FI84445C (fi) * 1990-03-30 1991-12-10 Rauma Oy Frammatningsanordning foer traed vid en flerfunktionsdel av en skogsmaskin.
SE500141C2 (sv) * 1990-09-24 1994-04-25 Grangaerde Maskin Ab Matarvals
US5997844A (en) * 1991-02-08 1999-12-07 Diatide, Inc. Technetium-99m labeled peptides for imaging
US7238340B1 (en) 1991-11-27 2007-07-03 Cis Bio International Monoamine, diamide, thiol-containing metal chelating agents
US5735325A (en) * 1995-07-17 1998-04-07 Plustech Oy Tree feeding device of a tree handling machine
CA2414553C (fr) * 2002-12-13 2006-09-05 Risley Enterprises Ltd. Rouleaux d'alimentation pour equipement de manutention d'arbres
DE102005060229A1 (de) * 2005-12-16 2007-06-21 Burkhard Winterhoff Antriebswalze

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1426274A (fr) * 1964-12-15 1966-01-28 Guilliet Ets Dispositif d'entraînement pour cylindres cannelés utilisables notamment dans les machines à bois
SE337198B (fr) * 1970-03-03 1971-07-26 Oestbergs Fabriks Ab
SE390155B (sv) * 1974-03-19 1976-12-06 Eriksson B E Matarverk
SE400209B (sv) * 1976-07-05 1978-03-20 Kockums Ind Ab Matarrulle vid en matningsanordning for frammatning av langstreckta foremal, serskilt tredstammar och liknande
SE400210B (sv) * 1976-07-05 1978-03-20 Kockums Ind Ab Matarrulle vid en matningsanordning for frammatning av langstreckta foremal, serskilt tredstammar och liknande
SE402230B (sv) * 1976-10-25 1978-06-26 Kockums Ind Ab Dubb vid matarvals for axiell matning av langstreckta foremal med fiberstruktur
CH626304A5 (fr) * 1977-12-08 1981-11-13 Gerhart Leuze

Also Published As

Publication number Publication date
DE3730057C1 (de) 1989-02-09
WO1989001854A1 (fr) 1989-03-09
EP0328605A1 (fr) 1989-08-23

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