WO1992013686A1 - A method and an arrangement for removing bark from a trunk - Google Patents

A method and an arrangement for removing bark from a trunk Download PDF

Info

Publication number
WO1992013686A1
WO1992013686A1 PCT/FI1992/000019 FI9200019W WO9213686A1 WO 1992013686 A1 WO1992013686 A1 WO 1992013686A1 FI 9200019 W FI9200019 W FI 9200019W WO 9213686 A1 WO9213686 A1 WO 9213686A1
Authority
WO
WIPO (PCT)
Prior art keywords
trunk
bark
rotation
lopping
longitudinal axis
Prior art date
Application number
PCT/FI1992/000019
Other languages
French (fr)
Inventor
Gustav Frantzen
Original Assignee
Oy Logset Ab
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 Oy Logset Ab filed Critical Oy Logset Ab
Priority to BR9205602A priority Critical patent/BR9205602A/en
Publication of WO1992013686A1 publication Critical patent/WO1992013686A1/en
Priority to SE9302577A priority patent/SE509584C2/en

Links

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
    • B27L1/00—Debarking or removing vestiges of branches from trees or logs; Machines therefor
    • B27L1/005—Debarking by non-rotatable tools
    • 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

  • This invention relates to a method for removing bark when handling a trunk in a timber harvester, especially in connection with lopping, wherein the lopping of the trunk is carried out when feeding the trunk through the harvester.
  • Timber harvesting techniques generally employ loading harvesters which mainly comprise a carrier, a boom assembly and a multi-function part.
  • the multi ⁇ function part forms the actual timber handling unit by means of which the timber is cut down, lopped and cut into lengths.
  • the object of the present invention is to improve the operations of this kind of multi-function part in such a way that handling stages after the timber harvesting are avoided, as such extra stages and the required additional equipment increase the costs considerably.
  • This object is achieved by means of a method according to the invention, which is characterized in that the trunk is brought into rotation about its longitudinal axis during the feed movement and that the removal of bark is carried out during the simultaneous rotation movement and feed movement.
  • the method according to the invention is based on the idea that the existing components of the known multi-function part, that is, the harvester, are modified to achieve an additional operation, that is, the barking of the trunk, which can be carried out simultaneously with the basic operations of the multi-function part, that is, the lopping and cutting of the trunk.
  • This is accomplished in a simple manner by bringing the trunk into rotation while it is fed through the multi-function part, called harvester below, by altering the position of the feeding means.
  • the bark is loosened by cutting it in the longitudinal direction while resisting its rotation with the trunk.
  • the barking of the trunk takes place in the same work stage as the lopping and cutting of the trunk. It is obvious that considerable savings in time, apparatus arrangements and costs are achieved in this way as compared with the conventional previously known timber harvesting technique.
  • the present invention also concerns an arrange ⁇ ment in a timber harvester, the arrangement being intended for .removing bark when handling a trunk in the timber harvester, especially in connection with lopping.
  • the timber harvester comprises at least means for feeding the trunk through the harvester and means for lopping the trunk, the arrangement being characterized in that the axis of rotation of the trunk feeding means is positioned at an angle with the longitudinal axis of the trunk in such a way that the trunk is brought into rotation about said longitudinal axis during the feed movement, and that the arrangement further comprises means for removing the bark during the simultaneous rotation movement and feed movement.
  • FIG. 1 shows the arrangement of feed rolls and lopping/barking blades
  • Figure 3 shows the arrangement of the feed rolls and a support roll.
  • the timber harvester is shown in the lopping position.
  • the timber harvester comprises feed rolls 1, lopping blades 2 and a support roll 4.
  • the operation, other components and operating machinery of the harvester will not be discussed in this connection, as they are obvious to one skilled in the art.
  • the trunk is lopped by feeding it through the timber harvester by means of the feed rolls 1, whereby the lopping is effected by the moving lopping blades 2 and a fixed lopping blade 2' .
  • the trunk is cut by means of a sawing device provided in the timber harvester (not shown).
  • Figure 2 shows how a trunk A is brought into rotation about its longitudinal axis during the feed movement. This takes place by placing the axis of rotation of the feed rolls 1 at an angle with the longitudinal axis of the trunk. The path of the feed rolls on the surface of the trunk is thereby spiral.
  • the feed rolls are preferably provided with a tooth ⁇ ing or e.g. with evolvent spikes to improve the grip between the bark and the feed rolls.
  • the removal of the bark is carried out during the simultaneous rotation movement (shown by the arrow R) and feed movement.
  • the lopping blades 2 are provided with cutters 3 which on one hand cut the bark in the longitudinal direction of the trunk and on the other hand grip the bark during its rotation movement, thus resisting the rotation of the bark and removing the bark from the trunk.
  • the bark is removed from the trunk in long strips when the trunk is removed from the harvester.
  • the support roll 4 supporting the feeding of the trunk is provided with a cutter or cutting disk 5 which has the same function as the above-described cutters 3 in the lopping blades 2.
  • the cutters 3 and 5 mentioned above are prefer ⁇ ably adopted to the operating conditions in each par ⁇ ticular case so that they do not penetrate through the bark into the proper wood.
  • a fibre wood quality such as eucalyptus
  • the penetration of the cutters into the surface of the wood material does not cause any significant damages.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Debarking, Splitting, And Disintegration Of Timber (AREA)
  • Harvester Elements (AREA)

Abstract

The invention relates to a method and an arrangement for removing bark when handling a trunk (A) in a timber harvester, especially in connection with lopping. To remove the bark, the axis of rotation of means (1) for feeding the trunk (A) is positioned at an angle with the longitudinal axis of the trunk in such a way that the trunk is brought into rotation about the longitudinal axis during the feed movement. The arrangement further comprises means (3) for removing bark during the simultaneous rotation movement (R) and feed movement.

Description

A method and an arrangement for removing bark from a trunk
This invention relates to a method for removing bark when handling a trunk in a timber harvester, especially in connection with lopping, wherein the lopping of the trunk is carried out when feeding the trunk through the harvester.
Timber harvesting techniques generally employ loading harvesters which mainly comprise a carrier, a boom assembly and a multi-function part. The multi¬ function part forms the actual timber handling unit by means of which the timber is cut down, lopped and cut into lengths. The object of the present invention is to improve the operations of this kind of multi-function part in such a way that handling stages after the timber harvesting are avoided, as such extra stages and the required additional equipment increase the costs considerably. This object is achieved by means of a method according to the invention, which is characterized in that the trunk is brought into rotation about its longitudinal axis during the feed movement and that the removal of bark is carried out during the simultaneous rotation movement and feed movement.
The method according to the invention is based on the idea that the existing components of the known multi-function part, that is, the harvester, are modified to achieve an additional operation, that is, the barking of the trunk, which can be carried out simultaneously with the basic operations of the multi-function part, that is, the lopping and cutting of the trunk. This is accomplished in a simple manner by bringing the trunk into rotation while it is fed through the multi-function part, called harvester below, by altering the position of the feeding means. Preferably, the bark is loosened by cutting it in the longitudinal direction while resisting its rotation with the trunk. Thus the barking of the trunk takes place in the same work stage as the lopping and cutting of the trunk. It is obvious that considerable savings in time, apparatus arrangements and costs are achieved in this way as compared with the conventional previously known timber harvesting technique.
The present invention also concerns an arrange¬ ment in a timber harvester, the arrangement being intended for .removing bark when handling a trunk in the timber harvester, especially in connection with lopping. The timber harvester comprises at least means for feeding the trunk through the harvester and means for lopping the trunk, the arrangement being characterized in that the axis of rotation of the trunk feeding means is positioned at an angle with the longitudinal axis of the trunk in such a way that the trunk is brought into rotation about said longitudinal axis during the feed movement, and that the arrangement further comprises means for removing the bark during the simultaneous rotation movement and feed movement. This arrangement provides the advantages of the method of the invention with a simple structure which does not require complicated modifications in a conventional timber harvester or an associated operating machinery.
In the following the invention will be describ¬ ed in greater detail by means of an illustrating embodiment with reference to the attached drawing, in which Figure 1 shows a timber harvester in the lopping position;
Figure 2 shows the arrangement of feed rolls and lopping/barking blades; and
Figure 3 shows the arrangement of the feed rolls and a support roll.
In Figure 1, the timber harvester is shown in the lopping position. The timber harvester comprises feed rolls 1, lopping blades 2 and a support roll 4. The operation, other components and operating machinery of the harvester will not be discussed in this connection, as they are obvious to one skilled in the art.
The trunk is lopped by feeding it through the timber harvester by means of the feed rolls 1, whereby the lopping is effected by the moving lopping blades 2 and a fixed lopping blade 2' . The trunk is cut by means of a sawing device provided in the timber harvester (not shown).
Figure 2 shows how a trunk A is brought into rotation about its longitudinal axis during the feed movement. This takes place by placing the axis of rotation of the feed rolls 1 at an angle with the longitudinal axis of the trunk. The path of the feed rolls on the surface of the trunk is thereby spiral. The feed rolls are preferably provided with a tooth¬ ing or e.g. with evolvent spikes to improve the grip between the bark and the feed rolls. The removal of the bark is carried out during the simultaneous rotation movement (shown by the arrow R) and feed movement. This, in turn, is effected by providing the lopping blades 2 with cutters 3 which on one hand cut the bark in the longitudinal direction of the trunk and on the other hand grip the bark during its rotation movement, thus resisting the rotation of the bark and removing the bark from the trunk. The bark is removed from the trunk in long strips when the trunk is removed from the harvester. Preferably, as shown in Figure 3, the support roll 4 supporting the feeding of the trunk is provided with a cutter or cutting disk 5 which has the same function as the above-described cutters 3 in the lopping blades 2.
The cutters 3 and 5 mentioned above are prefer¬ ably adopted to the operating conditions in each par¬ ticular case so that they do not penetrate through the bark into the proper wood. On the other hand, in the case of a fibre wood quality, such as eucalyptus, the penetration of the cutters into the surface of the wood material does not cause any significant damages. The drawings and the description related to it are only intended to illustrate the basic idea of the present invention. In their details, the method and the arrangement of the invention may vary within the scope of the attached claims. The feed rolls de- scribed above may, for instance, be replaced with caterpillar tracks or rubber rolls and the number and arrangement of the cutters can be varied.

Claims

Claims:
1. A method for removing bark when handling a trunk (A) in a timber harvester, especially in con- nection with lopping, wherein the lopping of the trunk is carried out when feeding the trunk through the harvester, c h a r a c t e r i z e d in that the trunk (A) is brought into rotation about its longitudinal axis during the feed movement and that the removal of bark is carried out during the simultaneous rotation movement (R) and feed movement.
2. A method according to claim 1, c h a r a c ¬ t e r i z e d in that the removal of bark comprises cutting the bark in the direction of the longitudinal axis of the trunk (A).
3. A method according to claim 1 or 2, c h a r¬ a c t e r i z e d in that the removal of bark com¬ prises resisting the rotation movement of the bark during the rotation of the trunk (A) about its longitudinal axis.
4. An arrangement in a timber harvester, the arrangement being intended for removing bark when handling a trunk (A) in the timber harvester, especially in connection with lopping, the harvester comprising at least means (1).- for feeding the trunk through it and means (2, 2') for lopping the trunk, c h a r a c t e r i z e d in that the axis of rotation of the means (1) for feeding the trunk (A)' is positioned at an angle with the longitudinal axis of the trunk in such a way that the trunk is brought into rotation about said longitudinal axis during the feed movement, and that the arrangement further com¬ prises means (3, 5) for removing bark during the simultaneous rotation movement (R) and feed movement.
5. An arrangement according to claim 4, c h a r a c t e r i z e d in that the means for feeding the trunk (A) comprise feed rolls (1) which are provided with a toothing to improve the grip be¬ tween the bark and the feed rolls.
6. An arrangement according to claim 4 or 5, c h a r a c t e r i z e d in that the means for re¬ moving bark comprise cutters (3) provided in con¬ nection with the means (2) for lopping the trunk and positioned in parallel with the longitudinal axis of the trunk, the cutters being arranged to both cut the bark in the longitudinal direction and remove the bark from the trunk during said rotation movement
(R).
7. An arrangement according to any of claims 4 to 6, c h a r a c t e r i z e d in that the means for removing bark comprise a cutter (5) provided in connection with a support roll (4) supporting the feeding of the trunk (A) and positioned in parallel with the longitudinal axis of the trunk, the cutter being arranged to both cut the bark in the longitudinal direction and remove the bark from the trunk during said rotation movement (R).
PCT/FI1992/000019 1991-02-07 1992-01-28 A method and an arrangement for removing bark from a trunk WO1992013686A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
BR9205602A BR9205602A (en) 1991-02-07 1992-01-28 Process for removing bark and arrangement on a wooden harvester
SE9302577A SE509584C2 (en) 1991-02-07 1993-08-06 Method and apparatus for detaching bark from a tree trunk

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI910590 1991-02-07
FI910590A FI86820C (en) 1991-02-07 1991-02-07 Method of loosening bark and device on a tree felling device

Publications (1)

Publication Number Publication Date
WO1992013686A1 true WO1992013686A1 (en) 1992-08-20

Family

ID=8531875

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1992/000019 WO1992013686A1 (en) 1991-02-07 1992-01-28 A method and an arrangement for removing bark from a trunk

Country Status (6)

Country Link
AU (1) AU1172892A (en)
BR (1) BR9205602A (en)
FI (1) FI86820C (en)
SE (1) SE509584C2 (en)
WO (1) WO1992013686A1 (en)
ZA (1) ZA92851B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026484A1 (en) * 1993-05-18 1994-11-24 Ictm - Instituto De Ciência E Tecnologia Dos Materiais Logs and branches debarker with converging blades
WO1996018481A2 (en) * 1994-12-16 1996-06-20 Beloit Technologies, Inc. Log conditioning before mechanical debarking
WO2007085696A1 (en) * 2006-01-24 2007-08-02 Ponsse Oyj Debarking arrangement for a wood-handling device
CN102672765A (en) * 2012-05-23 2012-09-19 厦门大学 Processing device for spiral grains of log
CN107953436A (en) * 2018-01-08 2018-04-24 安吉众普家具有限公司 A kind of timber peeling system
CN108000664A (en) * 2017-12-06 2018-05-08 刘智聪 Wood volume board production equipment
CN108015872A (en) * 2017-12-06 2018-05-11 刘智聪 Timber peeling cutting plate equipment
CN110216758A (en) * 2019-06-13 2019-09-10 南昌汇达知识产权有限公司 A kind of woodwork Raw material processing device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE154715C1 (en) *
SE179403C1 (en) * 1962-01-01
US3941174A (en) * 1975-02-18 1976-03-02 Caterpillar Tractor Co. Debarking assembly for tree harvesters
WO1991012943A1 (en) * 1990-02-26 1991-09-05 Risto Korhonen A device for barking logs and similar

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE154715C1 (en) *
SE179403C1 (en) * 1962-01-01
US3941174A (en) * 1975-02-18 1976-03-02 Caterpillar Tractor Co. Debarking assembly for tree harvesters
WO1991012943A1 (en) * 1990-02-26 1991-09-05 Risto Korhonen A device for barking logs and similar

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1994026484A1 (en) * 1993-05-18 1994-11-24 Ictm - Instituto De Ciência E Tecnologia Dos Materiais Logs and branches debarker with converging blades
WO1996018481A2 (en) * 1994-12-16 1996-06-20 Beloit Technologies, Inc. Log conditioning before mechanical debarking
WO1996018481A3 (en) * 1994-12-16 1996-12-05 Beloit Technologies Inc Log conditioning before mechanical debarking
WO2007085696A1 (en) * 2006-01-24 2007-08-02 Ponsse Oyj Debarking arrangement for a wood-handling device
CN102672765A (en) * 2012-05-23 2012-09-19 厦门大学 Processing device for spiral grains of log
CN108000664A (en) * 2017-12-06 2018-05-08 刘智聪 Wood volume board production equipment
CN108015872A (en) * 2017-12-06 2018-05-11 刘智聪 Timber peeling cutting plate equipment
CN107953436A (en) * 2018-01-08 2018-04-24 安吉众普家具有限公司 A kind of timber peeling system
CN107953436B (en) * 2018-01-08 2024-01-19 安吉众普家具有限公司 Timber peeling system
CN110216758A (en) * 2019-06-13 2019-09-10 南昌汇达知识产权有限公司 A kind of woodwork Raw material processing device
CN110216758B (en) * 2019-06-13 2021-09-03 南昌汇达知识产权有限公司 Woodwork raw material processing device

Also Published As

Publication number Publication date
ZA92851B (en) 1992-11-25
FI910590A (en) 1992-07-15
AU1172892A (en) 1992-09-07
SE509584C2 (en) 1999-02-15
SE9302577L (en) 1993-09-30
FI86820B (en) 1992-07-15
FI86820C (en) 1995-12-05
BR9205602A (en) 1994-07-26
FI910590A0 (en) 1991-02-07
SE9302577D0 (en) 1993-08-06

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