WO1999016598A1 - Cylindre d'alimentation - Google Patents

Cylindre d'alimentation Download PDF

Info

Publication number
WO1999016598A1
WO1999016598A1 PCT/FI1998/000752 FI9800752W WO9916598A1 WO 1999016598 A1 WO1999016598 A1 WO 1999016598A1 FI 9800752 W FI9800752 W FI 9800752W WO 9916598 A1 WO9916598 A1 WO 9916598A1
Authority
WO
WIPO (PCT)
Prior art keywords
feed roller
elements
friction
log
coupling
Prior art date
Application number
PCT/FI1998/000752
Other languages
English (en)
Inventor
Jorma Hyvönen
Paavo Alhainen
Original Assignee
Ponsse Oyj
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 Ponsse Oyj filed Critical Ponsse Oyj
Priority to AU93505/98A priority Critical patent/AU9350598A/en
Publication of WO1999016598A1 publication Critical patent/WO1999016598A1/fr
Priority to SE0000915A priority patent/SE517974C2/sv

Links

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
    • B27B25/02—Feeding devices for timber in saw mills or sawing machines; Feeding devices for trees with feed and pressure rollers

Definitions

  • the present invention relates to a feed roller for use in feeding timber, the feed roller comprising a body having disposed around its periphery friction elements, which comprise anti-slip elements and are disposed rotatably around a shaft transverse to the rotational direction of the feed roller and serve to improve the engagement between the feed roller and the log.
  • Feed rollers of this kind are generally used in harvesters.
  • a feed roller refers to a roller directing both a pulling and pushing motion to the log e.g. in such a harvester. Consequently, a drive wheel, feed wheel or roller wheel may be involved.
  • feed roller techniques include fixed wheels mostly made of steel, and wheels containing different kind of drive elements and rubber mixtures.
  • Fixed rollers used as feed rollers usually consist of a cylinder and various almost immobile anti-slip elements attached thereto. These are easy to manufacture, but because of an unfavourable distribution of surface tension, they easily damage the surface of the log. With increasing mechanical harvesting, surface damage to the timber has become an increasingly important factor in the economic use of timber.
  • Feed rollers of this kind comprising anti-slip elements articulated to the feed roller are disclosed in publications EP 0 478 522 and FI 54244, for example.
  • dampers made of a rubber material are disposed in connection with, preferably between, the anti-slip elements according to EP 0 478 522, for example.
  • the friction elements are arranged to slavishly follow the movements of the surface of the feed roller. This makes the friction elements or the anti-slip elements therein to dig into the surface of the log being conveyed causing disadvantageous damage to the surface.
  • FI 54244 differs from other solutions in that the friction elements of the feed roller are arranged to swing along the surface of the fed timber.
  • articulation of the feed roller is structurally difficult to implement to ensure a sufficient strength.
  • the front edges of the friction elements in such a feed roller hit the surface of the log first, usually causing the friction elements and/or the anti-slip element therein to momentarily dig into the surface of the log, resulting in permanent damage to the surface of the log.
  • It is a further object of the invention to provide a feed roller without harmful wear characteris- tics of rubber-coated wheels, resulting in longer maintenance intervals.
  • the feed roller having the characteristics of the present invention as defined in the claims.
  • the device of the present invention is mainly characterized in that the friction elements are mechanically coupled together by a coupling means, the successive friction elements at the periphery of the feed roller being coupled together with respect to their swinging motion.
  • the invention is based on the idea that no rubber or other flexible elements are needed to even out the surface pressure, instead the friction means provided with anti-slip elements are articulated to the body so that as many anti-slip elements as possible are constantly in contact with the surface of the log.
  • the articulation between the body and the friction element minimizes the swinging of the friction element and the anti-slip element in the timber when the feed roller is rotating.
  • the turning of the friction element around the fulcrum, caused by the traction force of the log, does not have to be limited or dampened by e.g. rubber if the fulcrum of the friction element is disposed preferably in the vicinity of that surface of the friction element which faces the log. In this case the friction element is immobile during feeding with respect to the surface of the log.
  • the structure of the feed roller according to the invention provides significant advantages.
  • the arrangement of at least two arrays of anti-slip elements on the surface of the friction element enables a greater number of arrays of anti-slip elements than usual to be constantly in contact with the surface of the log.
  • the friction elements of the invention are also immobile with respect to the surface of the log when the feed roller is rotating, the entire surface of the friction element resting against the surface of the log. Similarly, the entire surface of the friction element is detached substantially simultaneously. This naturally provides a significant improvement compared with fixed anti-slip elements in a feed roller, when, in the most disadvantageous situation, only one array of anti-slip elements contacts the surface of the log being conveyed.
  • the present invention also avoids the penetration by the friction elements and anti-slip elements of conventional feed rollers of the surface of the log. This way excessive damage to the surface of the log can be avoided and consequently as high a market value for the timber as possible can be maintained.
  • the device of the invention provides a feed roller having an even surface pressure even at lumps and other roughness on the surface of the log.
  • the radius of the feed roller is always substantially constant, since the friction element of the invention does not have to be mobile in the direction of the radius of the feed roller. This allows measurement of various magni- tudes, such as thickness, of the log from the control mechanisms of the feed rollers.
  • the feed rollers of the invention provide a product having a significantly longer maintenance interval than other known solutions. This allows the machinery to be used more efficiently for productive work. This also provides a feed roller whose measurement accuracy shows no substantial variations caused by temperature changes.
  • the friction elements of the feed roller of the invention are more simple to repair, even by the user alone, resulting in significant sav- ings in maintenance costs.
  • Figure 1 is a side view of an embodiment of the feed roller of the invention in partial cross-section, the friction elements being arranged schemati- cally in the feed roller, and
  • Figure 2 is a side view of a feed roller of a second embodiment of the invention, showing only part of the friction elements in the feed roller.
  • FIG. 1 shows a basic embodiment of the feed roller of the invention.
  • a feed roller 1 comprises a body 2 having friction elements 4 provided with anti-slip elements 3.
  • the body 2 is preferably made from steel plate and is shaped substantially as a circular plate, but may also be shaped as e.g. a circular cylinder or a polygon.
  • the body comprises a hole to accommodate a steering shaft coupled to an engine controlling the feed roller, and mounting holes for mounting the body to the shaft.
  • the friction elements 4 are disposed rotatably at the periphery 5 of the body 2 in a manner known per se.
  • the friction elements are arranged to turn in the rotational plane of the feed roller 1 so that, when moving, they adhere to the surface of the log 6 conveyed in the device and always direct an even pressure to the surface of the log.
  • the preferred embodiment of the invention shown in Figure 1 distinctly indicates the basic idea of the invention.
  • the friction elements 4 are coupled together mechanically in the feed roller 1 , and the friction element on the surface of the log 6 is arranged to guide the following friction element so that it contacts the surface of the log at the right angle when the feed roller is rotating. In this way the front edge 21 of the friction element or the anti-slip element 3 on the surface of the friction element does not hit the surface of the log in the usual manner, digging into it and damaging it. Instead, the friction element immediately places itself substantially in the direction of the surface of the log, using the maximum area to grip the log. Such mechanical coupling between the friction elements 4 thus efficiently prevents harvesting damage.
  • the coupling means 8, employed for the mechanical coupling of the friction elements comprises a cogwheel arrangement, e.g. what are known as involute gear teeth sectors.
  • the friction element 4 comprises coupling elements 9 and 10 at opposite ends in the sectional plane of its rotational direction. Consequently, one end of the friction element comprises a projection 9 and its opposite end a groove 10, formed by e.g. two projections, for receiving the projection of an adjacent friction element.
  • the coupling elements are preferably arranged transversely to the rotational direction of the feed roller 1 and form a fulcrum between the fric- tion elements.
  • a slot/pin coupling 1 1 shown in Figure 2 can also be employed in coupling the friction elements 4 together to achieve a mutual control motion.
  • one end of the friction element comprises a slot 12 and the other end a pin 13 for accommodating the slot of an adjacent friction element.
  • the coupling means 8 or 11 can also be implemented by another coupling method, such as a flexible wire-like coupling means, a claw coupling, or another machine element known per se.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Sheets, Magazines, And Separation Thereof (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Harvester Elements (AREA)
  • Harvesting Machines For Root Crops (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)

Abstract

Cette invention se rapporte à un cylindre d'alimentation (1) utilisé pour l'amenage du bois (6). Un tel cylindre d'alimentation comprend un corps (2) sur le pourtour (5) duquel sont disposés des éléments de friction (4) servant à améliorer la prise entre le cylindre d'alimentation et les grumes. Dans l'installation faisant l'objet de cette invention, les éléments de friction (4) sont couplés les uns aux autres mécaniquement par des moyens de couplage (8, 10), l'élément de friction en prise avec la surface d'une grume étant conçu pour guider l'élément de friction suivant sur la grume à angle droit. Un tel couplage mécanique entre les éléments de friction (4) empêche efficacement les dommages dus à l'abattage.
PCT/FI1998/000752 1997-09-26 1998-09-24 Cylindre d'alimentation WO1999016598A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AU93505/98A AU9350598A (en) 1997-09-26 1998-09-24 Feed roller
SE0000915A SE517974C2 (sv) 1997-09-26 2000-03-20 Dragrulle

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI973810A FI102052B (fi) 1997-09-26 1997-09-26 Vetopyörä
FI973810 1997-09-26

Publications (1)

Publication Number Publication Date
WO1999016598A1 true WO1999016598A1 (fr) 1999-04-08

Family

ID=8549612

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1998/000752 WO1999016598A1 (fr) 1997-09-26 1998-09-24 Cylindre d'alimentation

Country Status (4)

Country Link
AU (1) AU9350598A (fr)
FI (1) FI102052B (fr)
SE (1) SE517974C2 (fr)
WO (1) WO1999016598A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1559312A1 (fr) * 2004-01-29 2005-08-03 Risley Enterprises Ltd. Rouleaux d'alimentation pour la manipulation d'arbres

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106476102A (zh) * 2016-11-20 2017-03-08 北京林业大学 联合伐木机斜纹螺旋齿型进料辊

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR848784A (fr) * 1938-01-14 1939-11-07 Fischer Ag Georg Rouleau d'entraînement pour machines à bois
US3687271A (en) * 1970-03-03 1972-08-29 Ostbergs Fabriks Ab Feeding means for longitudinal objects in their longitudinal direction
EP0822039A1 (fr) * 1996-08-01 1998-02-04 Ponsse OY Cylindre d'alimentation

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR848784A (fr) * 1938-01-14 1939-11-07 Fischer Ag Georg Rouleau d'entraînement pour machines à bois
US3687271A (en) * 1970-03-03 1972-08-29 Ostbergs Fabriks Ab Feeding means for longitudinal objects in their longitudinal direction
EP0822039A1 (fr) * 1996-08-01 1998-02-04 Ponsse OY Cylindre d'alimentation

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7225842B2 (en) 2003-01-16 2007-06-05 Risley Enterprises Ltd. Feed rollers for tree handling
EP1559312A1 (fr) * 2004-01-29 2005-08-03 Risley Enterprises Ltd. Rouleaux d'alimentation pour la manipulation d'arbres

Also Published As

Publication number Publication date
FI102052B1 (fi) 1998-10-15
FI973810A0 (fi) 1997-09-26
FI102052B (fi) 1998-10-15
SE517974C2 (sv) 2002-08-13
SE0000915L (sv) 2000-03-22
AU9350598A (en) 1999-04-23
SE0000915D0 (sv) 2000-03-20

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