WO1991010544A1 - Method and apparatus for converting trees into wood chips - Google Patents
Method and apparatus for converting trees into wood chips Download PDFInfo
- Publication number
- WO1991010544A1 WO1991010544A1 PCT/FI1991/000019 FI9100019W WO9110544A1 WO 1991010544 A1 WO1991010544 A1 WO 1991010544A1 FI 9100019 W FI9100019 W FI 9100019W WO 9110544 A1 WO9110544 A1 WO 9110544A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- chipping
- tree
- unit
- stub
- vehicle
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01G—HORTICULTURE; CULTIVATION OF VEGETABLES, FLOWERS, RICE, FRUIT, VINES, HOPS OR SEAWEED; FORESTRY; WATERING
- A01G23/00—Forestry
- A01G23/02—Transplanting, uprooting, felling or delimbing trees
- A01G23/08—Felling trees
- A01G23/093—Combinations of shearing, sawing or milling apparatus specially adapted for felling 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
- B27L11/00—Manufacture of wood shavings, chips, powder, or the like; Tools therefor
- B27L11/02—Manufacture of wood shavings, chips, powder, or the like; Tools therefor of wood shavings or the like
Definitions
- the apparatus contains a chipping vehicle, at the mobile boom head of which a cutting and chipping unit is installed for cutting trees and converting them into chips. Produced chip is shifted over from chipping unit into a chip container on the vehicle.
- Chipping machines of the s.c. master's series are generally small tractor-mounted machines getting their driving power from the power take-off of the tractor and by means of which forest owners, making delivery loggings, can produce wood chips themselves of trees of own harvest.
- Apparatus related to converting standing trees into wood chip are known a.o. from US patents No. 3,651,845 and 3,646,976. They are not applicable for thinning, since their chipping method is space-taking or they cannot be driven close to the tree. They are practicable for for converting either a single tree in a clearing or all directly oncoming trees into wood chip, but it requires quite a passable terrain.
- Fig. 1 shows the chipping vehicle.
- Fig. 2 shows the cutting and chipping unit of the chipping vehicle
- Fig. 3 shows the gripping and delimbing rolls of the tree to be converted into wood chip
- Fig. 4 shows the delimbing, debarking and chipping unit
- Fig. 5 shows the delimbing blades
- Fig. 6 shows the cutting and chipping blade disc
- Fig. 7 is the cross-section of the chipping blade
- Figure 1 illustrates a chipping vehicle 1 furnished with a chip container 2 and a hydraulic boom 3 with a chipping unit 4 at its top, by means of which a tree 6 to be converted into wood chip is cut and chipped in standing position, support rolls 16 holding tree upright and delimbing, steering and feeding it to the blade in the chipping unit.
- Produced wood chip is shifted along a conveyor 5 to the chip container 2.
- Chipping unit 4 is furnished with outriggers 8.
- FIG. 2 shows the chipping vehicle with a chipping unit with outriggers 8 and a tree gripping jaw 10 driven by a hydraulic cylinder 7.
- the jaw presses the trunk against part 11.
- the tree is cutted with a combination 13 consisting of chipping blades 25 on a saw disc which are manipulated by a hydraulic cylinder 9 and rotated by a hydraulic motor 12.
- the outer of edge of saw disc is formed as a circular saw.
- blades 25 convert the standing tree into chips. At least during chipping, it is preferable to keep the blade blame assembly in slanting position, at angle of up to 45° with the tree.
- Produced chip is collected with a funnel receptacle 14 and shifted along conveyor 5 to wood chip container 2 on the chipping vehicle.
- FIG. 3 shows support and delimbing rolls 15,16, by means of which the trunk is kept upright and fed into the chipping unit while making chip.
- Rolls 15,16 delimbe the tree when it is fed downward upon chipping.
- rolls 15,16 are in a position where the direction of their longitudinal axis deviates from the direction perpendicular to the longitudinal axis of the tree.
- Rolls 15 and 16 are fastened rotatably on levers 17,18 and the rolls can can be moved with relation to the tree in turning the levers 17,18. Rotation of rolls is effected by means of a hydraulic motor.
- Fig. 4 shows the chipping unit 4 with the blade disc 24 in slanting position, cutting the tree by means of its end bits 26 and chipping blades 25. Chip is produced already upon cutting and ejected by the blade assembly into a collector bin 23 from where it is shifted over, as described, to container 2.
- the container bottom 22 is robust and moves on the stub as cutting advances and, finally, carries the chipping unit 4 and the tree 6.
- the chipping unit is fastened to the boom arm 20 with cylinder 21.
- Blade bar 24 is fixed to frame member 19 by means of a bar 27, against the roll 28 of which the tree is supported.
- Turnable arms 29 are fixed to frame member 19 by an articulation 35. One of the arms 29 is behind the tree.
- the arms embrace the tree with a strong grip for support and put chipping unit into working position.
- the arms are furnished with hydraulically rotatable debarking rolls. After cutting, the tree is put into rotation by means of rotating and inclined feeding rolls 16.
- Feed roll arms 31 open and adjust according to tree diameter.
- Delimbing rolls 32,33 are fastened to same arms and are also adjustable according to tree diameter.
- Blades 32,33,34 can be spring-loaded, whereby leaned against the trunk they cut off oncoming limbs. The blades turn around a fulcrum pin 36.
- Figure 6 illustrates a blade disc 24 with blade bits 26 along its edge and chipping blades 25 protruding from blade disc upper face. Wood chip is moved from the front of the blade through the disc to its underside and further into the collecting bin ejected by the winglike blade.
- Figure 7 illustrates as cross-section of the fastening of blade 25 to the blade disc by means of an abuttment bit 35. The chips teared off the tree are slewed from the front of blade through the disc to the its underside.
- the chipping unit can be furnished with a gripping element to take support from the stub and keep tree upright on the stub and by means of which tree can be lifted and supported during processing, for instance by means of hydraulic cylinders.
- the tree can be cut also by using a blade, which driven by great power power cuts the tree and then engages ti with the chipping blade.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Forests & Forestry (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Wood Science & Technology (AREA)
- Biodiversity & Conservation Biology (AREA)
- Ecology (AREA)
- Environmental Sciences (AREA)
- Debarking, Splitting, And Disintegration Of Timber (AREA)
Abstract
Method and apparatus for converting a tree (6) into wood chips by means of a chipping unit (4) coupled to a vehicle (1). Chipping unit (4) coupled to vehicle (1) is taken to the tree base (6) and by means of its gripping elements (10, 11) support is taken from the trunk and after cutting the tree (6) chipping unit (4) converts the tree into wood chips with tree standing on the stub and lowering against chipping blades (13) by means of the force of gravity or a feeding apparatus (15, 16). Chipping unit (4) takes support from the ground or tree base. Produced wood chip is shifted by a conveyor assembled to chipping unit (4) to a wood chip container (2) in chipping vehicle (1). Pre-delimbing or pre-debarking of tree (6) is made by blades or drums (16) above the chipping unit.
Description
METHOD AND APPARATUS FOR CONVERTING TREES INTO WOOD CHIPS
An invention related to method and apparatus for converting trees into wood chips standing on their stubs. The apparatus contains a chipping vehicle, at the mobile boom head of which a cutting and chipping unit is installed for cutting trees and converting them into chips. Produced chip is shifted over from chipping unit into a chip container on the vehicle.
Today, in harvesting small-sized timber in connection with improvement cuttings from growing stands, some of the trees must be thinned out in the age of ab 20-30 years, in order to make place for the tops of remaining trees and to avoid pole-stage of forest. Felling has been carried out mainly by timber workers who fell, delimbe and cut the trees to be thinned out into 3 meter blocks which are then collected into piles along driving tracks and transported to timber yards e.g. by forest tractors.
Part of the piled wood harvested in above manner, is converted into wood chip either in the timber yard by means of a movable chipping machine or it transported unprocessed to a pulp mill where chipping is concentrated to a bigger chipping unit. Chipping machines of the s.c. master's series, are generally small tractor-mounted machines getting their driving power from the power take-off of the tractor and by means of which forest owners, making delivery loggings, can produce wood chips themselves of trees of own harvest.
Apparatus related to converting standing trees into wood chip are known a.o. from US patents No. 3,651,845 and 3,646,976. They are not applicable for thinning, since their chipping method is space-taking or they cannot be driven close to the tree. They are practicable for for converting either a single tree in a clearing or all directly oncoming trees into wood
chip, but it requires quite a passable terrain.
By means of a chipping vehicle as per the invention, a fundamental advantage is achieved compared with said disadvantages. In order to put this method into practice, the chipping vehicle of the invention is characterized in what has been presented in the enclosed patent claims 1 and 5.
It can be considered the most important advantage of method and apparatus of this invention that handling a tree to be converted into wood chip is carried out in stage, which means that the delivery time of wood chip from forest to pulp mill can be reduced to a minimum. Likewise, the working conditions of workers converting trees into wood chip are improved remarkably, whereby lack of labor prevailing in the wood thinning sector can be eased through making the working conditions less stressing. In addition, according to the method of the invention, the convertion into wood chip can be done with trees in standing position, whereby damage to surrounding trees is also reduced to a minimum. The mobile boom and the chipping unit at its head can be of relativley light construction since the tree is in no stage hanging from the boom. Thus the boom can reach rather far and the vechicle must not be moved very often. The wood chip container can also be of exchangeable type.
In the following the invention is defined with reference to enclosed drawings:
Fig. 1 shows the chipping vehicle.
Fig. 2 shows the cutting and chipping unit of the chipping vehicle Fig. 3 shows the gripping and delimbing rolls of the tree to be converted into wood chip Fig. 4 shows the delimbing, debarking and chipping unit Fig. 5 shows the delimbing blades
Fig. 6 shows the cutting and chipping blade disc Fig. 7 is the cross-section of the chipping blade
Figure 1 illustrates a chipping vehicle 1 furnished with a chip container 2 and a hydraulic boom 3 with a chipping unit 4 at its top, by means of which a tree 6 to be converted into wood chip is cut and chipped in standing position, support rolls 16 holding tree upright and delimbing, steering and feeding it to the blade in the chipping unit. Produced wood chip is shifted along a conveyor 5 to the chip container 2. Chipping unit 4 is furnished with outriggers 8.
Figure 2 shows the chipping vehicle with a chipping unit with outriggers 8 and a tree gripping jaw 10 driven by a hydraulic cylinder 7. The jaw presses the trunk against part 11. The tree is cutted with a combination 13 consisting of chipping blades 25 on a saw disc which are manipulated by a hydraulic cylinder 9 and rotated by a hydraulic motor 12. The outer of edge of saw disc is formed as a circular saw. After cutting, blades 25 convert the standing tree into chips. At least during chipping, it is preferable to keep the blade blame assembly in slanting position, at angle of up to 45° with the tree. Produced chip is collected with a funnel receptacle 14 and shifted along conveyor 5 to wood chip container 2 on the chipping vehicle.
Figure 3 shows support and delimbing rolls 15,16, by means of which the trunk is kept upright and fed into the chipping unit while making chip. Rolls 15,16 delimbe the tree when it is fed downward upon chipping. In order to increase the delimbing effect, rolls 15,16 are in a position where the direction of their longitudinal axis deviates from the direction perpendicular to the longitudinal axis of the tree. Rolls 15 and 16 are fastened rotatably on levers 17,18 and the rolls can can be moved with relation to the tree in
turning the levers 17,18. Rotation of rolls is effected by means of a hydraulic motor.
Fig. 4 shows the chipping unit 4 with the blade disc 24 in slanting position, cutting the tree by means of its end bits 26 and chipping blades 25. Chip is produced already upon cutting and ejected by the blade assembly into a collector bin 23 from where it is shifted over, as described, to container 2. The container bottom 22 is robust and moves on the stub as cutting advances and, finally, carries the chipping unit 4 and the tree 6. The chipping unit is fastened to the boom arm 20 with cylinder 21. Blade bar 24 is fixed to frame member 19 by means of a bar 27, against the roll 28 of which the tree is supported. Turnable arms 29 are fixed to frame member 19 by an articulation 35. One of the arms 29 is behind the tree. The arms embrace the tree with a strong grip for support and put chipping unit into working position. The arms are furnished with hydraulically rotatable debarking rolls. After cutting, the tree is put into rotation by means of rotating and inclined feeding rolls 16. Feed roll arms 31 open and adjust according to tree diameter. Delimbing rolls 32,33 are fastened to same arms and are also adjustable according to tree diameter.
Figure 5 illustrates the delimbing blades and cross-section of blade 32 profile. Blades 32,33,34 can be spring-loaded, whereby leaned against the trunk they cut off oncoming limbs. The blades turn around a fulcrum pin 36.
Figure 6 illustrates a blade disc 24 with blade bits 26 along its edge and chipping blades 25 protruding from blade disc upper face. Wood chip is moved from the front of the blade through the disc to its underside and further into the collecting bin ejected by the winglike blade.
Figure 7 illustrates as cross-section of the fastening of blade 25 to the blade disc by means of an abuttment bit 35. The chips teared off the tree are slewed from the front of blade through the disc to the its underside.
Especially worht noting is the fact that the chipping unit can be furnished with a gripping element to take support from the stub and keep tree upright on the stub and by means of which tree can be lifted and supported during processing, for instance by means of hydraulic cylinders. The tree can be cut also by using a blade, which driven by great power power cuts the tree and then engages ti with the chipping blade. Anyhow, the invention is introduced here by referring only to one of its useful embodiments but many modifications are possible within the inventional idea determined by the following patent claims
Claims
1. A method for converting a tree (6) into wood chips by means of a chipping unit (4) coupled to a vehicle 1, wherein a cutting and chipping apparatus is taken to the butt from chipping unit 4 which is mounted to vechicle 1 and trunk embraced with gripping elements (10,11,29) of chipping unit and wherein after cutting the chipping unit converts tree into wood chip with tree in standing position as it is lowered against chipping blades (13,24) of the chipping unit by the force of gravity or by a feeding unit (15,16) characterized in that the apparatus is taken by means of a boom (3) to the butt where during cutting the apparatus takes support from stub or the ground beside it.
2. A method according to patent claim 1 characterized in that chipping unit (4) gets good holdfast of ground by means of its outriggers (8).
3. A method according to patent claim 1 characterized in that the tree is put into rotation during processing.
4. A method according to patent claims 1-4 characterized in that the tree is delimbed before converting it into wood chip.
5. A method according to patent claims 1-4 characterized in that a disc formed blade (13,24) rotates deviating from the vertical plane during cutting and/or chipping.
6. Apparatus for putting the method according to patent claim into practice, comprised of a chipping vehicle (1) and a chipping unit (4), mobile with respect to the vehicle, and furnished with supporting arms (10,11,29,31) for keeping tree upright and a blade (13,24) for converting standing tree into wood chip and equipment (5) for conveyance of wood chips into vehicle characterized in that chipping unit (4) is suspended from the boom arm (3) upon moving from stub to stub and comprises support elements for steady holdfast of stub (22) or the ground beside the tree (8).
7. Apparatus according to patent claim 6 characterized in that chipping unit (4) is furnished with immobile or mobile outriggers (8) .
8. Apparatus according to patent claims 6 or 7 characterized in that chipping unit (4) comprises a gripping element (22) for support from stub or tree base as it rests on the stub.
9. Apparatus according to patent claims 6 - 8 characterized in that chipping and cutting is done with a circular blade (12,24), through the disc part of which wood chip is ejected to the conveying equipment.
10. Apparatus according to patent claims 6 - 9 characterized in that delimbing elements (30) are arranged above the chipping blade.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FI900286A FI86682C (en) | 1990-01-17 | 1990-01-17 | Wood chipping process and apparatus |
FI900286 | 1990-01-17 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991010544A1 true WO1991010544A1 (en) | 1991-07-25 |
Family
ID=8529733
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FI1991/000019 WO1991010544A1 (en) | 1990-01-17 | 1991-01-17 | Method and apparatus for converting trees into wood chips |
Country Status (2)
Country | Link |
---|---|
FI (1) | FI86682C (en) |
WO (1) | WO1991010544A1 (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2279223A (en) * | 1993-06-28 | 1995-01-04 | Josef Gress | Method and equipment for felling and processing trees |
WO1996019101A1 (en) * | 1994-12-22 | 1996-06-27 | Sisu Cranab Ab | Method and apparatus for removing limbs of standing trees |
WO2007066161A1 (en) * | 2005-12-09 | 2007-06-14 | Optigép KFT. | Tree feller-chipper |
WO2009070897A1 (en) | 2007-12-07 | 2009-06-11 | Jean-Guy Lebreux | Sawing and chipping device |
EP2178676A2 (en) * | 2007-07-13 | 2010-04-28 | Leonardi Manufacturing Co. | Wood chip collection system |
EP2522213A1 (en) * | 2011-05-12 | 2012-11-14 | Werner Steininger | Collector for mower |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2094895A5 (en) * | 1971-01-04 | 1972-02-04 | Garino Roger | |
US3651845A (en) * | 1970-05-25 | 1972-03-28 | Robert L Propst | Method and apparatus for converting trees into wood chips |
US3871427A (en) * | 1968-06-28 | 1975-03-18 | Lars Harald Widegren | Device for felling timber |
SU912115A1 (en) * | 1980-07-04 | 1982-03-15 | Центральный Научно-Исследовательский И Проектно-Конструкторский Институт Механизации И Энергетики Лесной Промышленности | Machine for reprocessing tree plants into wood chips |
SU1429988A1 (en) * | 1985-12-23 | 1988-10-15 | Свердловское Научно-Производственное Лесозаготовительное Объединение | Tree-harvesting machine |
-
1990
- 1990-01-17 FI FI900286A patent/FI86682C/en not_active IP Right Cessation
-
1991
- 1991-01-17 WO PCT/FI1991/000019 patent/WO1991010544A1/en unknown
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3871427A (en) * | 1968-06-28 | 1975-03-18 | Lars Harald Widegren | Device for felling timber |
US3651845A (en) * | 1970-05-25 | 1972-03-28 | Robert L Propst | Method and apparatus for converting trees into wood chips |
FR2094895A5 (en) * | 1971-01-04 | 1972-02-04 | Garino Roger | |
SU912115A1 (en) * | 1980-07-04 | 1982-03-15 | Центральный Научно-Исследовательский И Проектно-Конструкторский Институт Механизации И Энергетики Лесной Промышленности | Machine for reprocessing tree plants into wood chips |
SU1429988A1 (en) * | 1985-12-23 | 1988-10-15 | Свердловское Научно-Производственное Лесозаготовительное Объединение | Tree-harvesting machine |
Non-Patent Citations (2)
Title |
---|
DERWENT'S ABSTRACT, No. 89-198679/27; & SU,A,1 429 988, Publ. Week 8927, (SVERD FORESTRY COMB.). * |
DERWENT'S ABSTRACT, No. B2633K/04; & SU,A,912 115, Publ. Week 8304, (FOREST POWER MECHN INST.). * |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2279223A (en) * | 1993-06-28 | 1995-01-04 | Josef Gress | Method and equipment for felling and processing trees |
GB2279223B (en) * | 1993-06-28 | 1996-10-09 | Josef Gress | Method and equipment for felling and processing trees |
WO1996019101A1 (en) * | 1994-12-22 | 1996-06-27 | Sisu Cranab Ab | Method and apparatus for removing limbs of standing trees |
WO2007066161A1 (en) * | 2005-12-09 | 2007-06-14 | Optigép KFT. | Tree feller-chipper |
EP2178676A2 (en) * | 2007-07-13 | 2010-04-28 | Leonardi Manufacturing Co. | Wood chip collection system |
EP2178676A4 (en) * | 2007-07-13 | 2011-11-16 | Leonardi Mfg Co Inc | Wood chip collection system |
US8678052B2 (en) | 2007-07-13 | 2014-03-25 | Leonardi Manufacturing Co. | Wood chip collection system |
US9743594B2 (en) | 2007-07-13 | 2017-08-29 | Leonardi Manufacturing Co. | Wood chip collection system |
WO2009070897A1 (en) | 2007-12-07 | 2009-06-11 | Jean-Guy Lebreux | Sawing and chipping device |
EP2522213A1 (en) * | 2011-05-12 | 2012-11-14 | Werner Steininger | Collector for mower |
Also Published As
Publication number | Publication date |
---|---|
FI86682B (en) | 1992-06-30 |
FI900286A (en) | 1991-07-19 |
FI86682C (en) | 1992-10-12 |
FI900286A0 (en) | 1990-01-17 |
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