CA1070220A - Forestry machines - Google Patents
Forestry machinesInfo
- Publication number
- CA1070220A CA1070220A CA266,769A CA266769A CA1070220A CA 1070220 A CA1070220 A CA 1070220A CA 266769 A CA266769 A CA 266769A CA 1070220 A CA1070220 A CA 1070220A
- Authority
- CA
- Canada
- Prior art keywords
- branches
- twigs
- tree
- trunk
- chipper
- 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.)
- Expired
Links
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- Debarking, Splitting, And Disintegration Of Timber (AREA)
Abstract
ABSTRACT OF DISCLOSURE
The invention relates to a method and apparatus for recovering forestry products in an economic manner, and in particular utilises a base machine capable of recovering efficiently all the wood products obtained when logging timber.
In accordance with the method a felled tree is fed into the base machine in the direction of its longitudinal axis with its root end leading, the branches and twigs are pressed to lie flat against the trunk during feeding towards a de-branching station, severed branches and twigs which are in substantial alignment, together with a severed top part of the tree, are then fed via a conveyor to a chipper, chips and pine needles obtained from the chipper being separated and recovered separately.
The invention relates to a method and apparatus for recovering forestry products in an economic manner, and in particular utilises a base machine capable of recovering efficiently all the wood products obtained when logging timber.
In accordance with the method a felled tree is fed into the base machine in the direction of its longitudinal axis with its root end leading, the branches and twigs are pressed to lie flat against the trunk during feeding towards a de-branching station, severed branches and twigs which are in substantial alignment, together with a severed top part of the tree, are then fed via a conveyor to a chipper, chips and pine needles obtained from the chipper being separated and recovered separately.
Description
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In orde~ to recover completely fore~try products in an economic manner it i~ necessary to have on site a base machine capable of recovering efficiently all wood products obtained when logging timber in accordance with the 90 called half-~unk method without requiring excessive work on the part Oe personnel.
In addition to the actual timber obtained from a felled tree, which tree should be cut to desired dimensions on the felling site, these products comprise bark, saw-dust, chips, greenwood, pine needles and like products.
A tree may be felled manually with a motor saw or mechanically with a hydraulically-operated cro~s-cut saw, whereafter the trunk is usually cut into ~0 from one to three sections, and a further section comprising the upper portion of the tree, this latter section being referred to as the "half-tree". Branches and twigs are removed from trunk sections having a diameter of 30 cm or more.
The felled tree is usually transported $o a working site by means of a rnotoriæed vehicle, optionally provlded with an extensible unit. On the working site a base machine is normally provided, and the invention relates to such a machine. The base machine i3 usually moveable, for example, by mean~ of a tractor or some 3imilar towing-vehicle and is provided with a separate motor which may well have a horse power of approximately 260 hp to drive a feed mechanism ~r trunk section~ and half-trunks.
An object of the invention is to provide a method and apparatus for the efficient recovery of forestr~ products as well as the efficient u~e of manpower for the recovery operation.
A ba~e machine according to the invention i9 operative to press the branches together 80 that said branches are fed endwise into a de-branching drum (hogging cylinder) of a rotary de-branching apparatus, which msy be controlled
In orde~ to recover completely fore~try products in an economic manner it i~ necessary to have on site a base machine capable of recovering efficiently all wood products obtained when logging timber in accordance with the 90 called half-~unk method without requiring excessive work on the part Oe personnel.
In addition to the actual timber obtained from a felled tree, which tree should be cut to desired dimensions on the felling site, these products comprise bark, saw-dust, chips, greenwood, pine needles and like products.
A tree may be felled manually with a motor saw or mechanically with a hydraulically-operated cro~s-cut saw, whereafter the trunk is usually cut into ~0 from one to three sections, and a further section comprising the upper portion of the tree, this latter section being referred to as the "half-tree". Branches and twigs are removed from trunk sections having a diameter of 30 cm or more.
The felled tree is usually transported $o a working site by means of a rnotoriæed vehicle, optionally provlded with an extensible unit. On the working site a base machine is normally provided, and the invention relates to such a machine. The base machine i3 usually moveable, for example, by mean~ of a tractor or some 3imilar towing-vehicle and is provided with a separate motor which may well have a horse power of approximately 260 hp to drive a feed mechanism ~r trunk section~ and half-trunks.
An object of the invention is to provide a method and apparatus for the efficient recovery of forestr~ products as well as the efficient u~e of manpower for the recovery operation.
A ba~e machine according to the invention i9 operative to press the branches together 80 that said branches are fed endwise into a de-branching drum (hogging cylinder) of a rotary de-branching apparatus, which msy be controlled
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photo-electrically, 8 chlpper is arrangecl on the frame of the machine alld the removed branches and twigs are fed endwise into the chipper Vi8 a conveyor.
The chipper may be provided with one or more centrifugal ~ans which, in turn, co-operate with tubes through which chips and/or pine needles, bark e~, are blown. Suitably, the tubes are directed into containers, which are filled dirèctly for further transp~rc, The base ma~hine may also be provided with a crane having a foldable arm and gripping devices intended to pull a half-txunk and optionally trunk section~ into the feed mechanism of the machine and means for topping a felled tree.
~0 The various parts of the base machine are arranged to co-act with each other preferably in a manner such that the individual trunk sections and the chips are discharged separately, wherewith fans may be arranged in the pathway of the chips from the chipper so as to screen pine needles etc from the chips and rema e ~e ne~les etc therefrom by centrifugal force9 theneedles etc. being collected in a ~eparate con~ainer. The pine needles etc~ recoveredl referred to herein~fter a~ "pine needles" may be used for convexsion to anlmal fodder.
The various parts and units of the universal machine are suitably driven hydraulically or electrically by the engine of the machine. Optionally, the machme may be provided with additional cutting devices provided with length-0~ measuring instruments, The conta~ners filledwith chips or pine needles arethen removed by means o~ motorised vehicle~ in a manner known E~ ~ . In princlple, the base machine according to the present Invention is intended to be operated by only one man. The preferred requirement~ for manoeuvrability of the base machine are that it ~hall be capable of being moved oll the working ~ite and that it shall be capable of carrying out the following operations.
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z~o With the aid of a single manoeuvring crane having a wide operating span, it shall be possible to drag, preferably long and slender piecPs of wood with branches and pine needles still attached, to the actual base machine and to feed the same into said machine, whereupon the wood is de-branched. At least the branches are cut into chips (gre~nwood). The pine needles and greenwood are mutually separated in a suitable screening device and are loaded by means of suitable ~ransporters intO.
containers onto a container carriage which may be front-coupled.
The qusntity of industrial wood recovered can be increased significantly compared to that which has been possible with mechanical operation, owing to the ~0 fact that the tree, by use of a base machine according to the invention, can be recovered efficiently up to a 4 cm top diameter, wherewith the recovery of greenwood and pine needles i9 al90 of economic significance, such recovery not previously being possible.
The inven~ion also affords other advantages from the aspect of forest hygiene.
For examplet the spawning of harmful insects i8 reduced and preparation of the ground and other re-growth measures is facilitated.
The bDse machine is preferably provided with an indivldual power source in the form of a motor which carrie~ out the wood-treating work. ~he base machine can be moved within the working area by means of a tractor whose operating devices are connected to and controlled from the càbin of the base machine, preferably hydraulically.
When a container caxriage is front-coupled to the tractor, which may be suitable when the container carriage is to be moved only through small distances9 the control signals may also be transmitted hydraulically to the wheels of the container carriage. In this way, movFment of the container carriage within ~ ~ . ...
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photo-electrically, 8 chlpper is arrangecl on the frame of the machine alld the removed branches and twigs are fed endwise into the chipper Vi8 a conveyor.
The chipper may be provided with one or more centrifugal ~ans which, in turn, co-operate with tubes through which chips and/or pine needles, bark e~, are blown. Suitably, the tubes are directed into containers, which are filled dirèctly for further transp~rc, The base ma~hine may also be provided with a crane having a foldable arm and gripping devices intended to pull a half-txunk and optionally trunk section~ into the feed mechanism of the machine and means for topping a felled tree.
~0 The various parts of the base machine are arranged to co-act with each other preferably in a manner such that the individual trunk sections and the chips are discharged separately, wherewith fans may be arranged in the pathway of the chips from the chipper so as to screen pine needles etc from the chips and rema e ~e ne~les etc therefrom by centrifugal force9 theneedles etc. being collected in a ~eparate con~ainer. The pine needles etc~ recoveredl referred to herein~fter a~ "pine needles" may be used for convexsion to anlmal fodder.
The various parts and units of the universal machine are suitably driven hydraulically or electrically by the engine of the machine. Optionally, the machme may be provided with additional cutting devices provided with length-0~ measuring instruments, The conta~ners filledwith chips or pine needles arethen removed by means o~ motorised vehicle~ in a manner known E~ ~ . In princlple, the base machine according to the present Invention is intended to be operated by only one man. The preferred requirement~ for manoeuvrability of the base machine are that it ~hall be capable of being moved oll the working ~ite and that it shall be capable of carrying out the following operations.
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z~o With the aid of a single manoeuvring crane having a wide operating span, it shall be possible to drag, preferably long and slender piecPs of wood with branches and pine needles still attached, to the actual base machine and to feed the same into said machine, whereupon the wood is de-branched. At least the branches are cut into chips (gre~nwood). The pine needles and greenwood are mutually separated in a suitable screening device and are loaded by means of suitable ~ransporters intO.
containers onto a container carriage which may be front-coupled.
The qusntity of industrial wood recovered can be increased significantly compared to that which has been possible with mechanical operation, owing to the ~0 fact that the tree, by use of a base machine according to the invention, can be recovered efficiently up to a 4 cm top diameter, wherewith the recovery of greenwood and pine needles i9 al90 of economic significance, such recovery not previously being possible.
The inven~ion also affords other advantages from the aspect of forest hygiene.
For examplet the spawning of harmful insects i8 reduced and preparation of the ground and other re-growth measures is facilitated.
The bDse machine is preferably provided with an indivldual power source in the form of a motor which carrie~ out the wood-treating work. ~he base machine can be moved within the working area by means of a tractor whose operating devices are connected to and controlled from the càbin of the base machine, preferably hydraulically.
When a container caxriage is front-coupled to the tractor, which may be suitable when the container carriage is to be moved only through small distances9 the control signals may also be transmitted hydraulically to the wheels of the container carriage. In this way, movFment of the container carriage within ~ ~ . ...
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3 C~7~0 the worklng ~ite may be effected from the operating cabin of the base machine.
When driving on roads and highways, the base machine would be towed by the tractor. The container carriage may then have the form of an additional trailer, When the wheels of the container carriage can be steered, steering of ~he wheels i9 prevented in the transport direction in a known manner.
An embodiment of a base machine according to the present invention will now be described in more detail and with reference to the accompanying drawing;
in which :-Figure 1 is a ~chematic sectional view of the machine, ~O F~gare 2 is a schematic top plan view of the same machine;
Figure 3 is a side view of feed-in means Pigure 4 is a schematic top plan view of the same means;
~igure 5 is a ~chematic sectio~al view of the de-branching drum of the base machine; and Figure 6 is a section through the de-branching drum.
Referring to the drawingt the base machine comprises a chassis 1 and a further chassis 2 arranged on said chassis 1. The part referenced 3 contains a chipper having an outlet pipe 17 (~ee ~igure 2) for chips produced, whilst the reference 4 identifies a motor for driving the working parts of the base machine, o20 said mo~or suitably being a diesel motor and developing around 200-300 hp.
Conveyor means are provided 6uitably in the form of a belt conveyor 5 with support rollers 6, and press rolls 7 are provided for feeding removed branches and the like towards the conveyor belt. A pair of feed rolls 8 are provided for de-branched trunk sections and an ex~ensible crane 9 is also provided operable from a cabin 10.
Arranged at the loading end of the base machine are drive rolls 13 provlded ' -: :
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with a guide ~roove for an infecl trunk section. Obliquely positioned cleaning rolls 14 are arranged behind the rolls 13 and behind the rolls 14 are arranged de-branching knives 15 which are provided on a de-branching drum 21 which is .
rotatably mounted and driven by a hydraulic or electric motor 16, or the like, via a belt transmission.
Arranged at the loading, or in-feed end of the machine are topping shears 22, a pressure roll 23 arranged to press branches and the like t~gether~
and a separate drive roll 30 having a protective plate 32 for the topped portion 32 of the tree tO be fed ~o the chipper 3.
The d~ive motor 4 of the base machine operates via a belt transmission 19 on a hydraulic pump 18 and, optionally, directly on the chipper 3.
Further elements of the machine include an inner shield plate 24, a hydraulic cylinder 11 for the topping shears 22 and a further shield plate 12.
Support means ~or the hydraulic cylinder il are shown st 25 and a tank for the hydraulic oil is shown at 26. A fuel tank 28 i9 provided for the vehicle as well ns a locntion for a tool box 27, both items being accommodated within thn outer -confines of the ba~e machine. Support rollers 20 are provided for the ~reàted nnd discharged tr~k ~ection, as well a~ a hoolk 29 to facilitate transportntion of ~;
the machine.
~ igures 3 and 4 show schematically the in-feed machinery of the base machine, Thi~ machinery comprises two pairs of rolls 13 and 50 respectively, each of which hns a deep V-shaped guide ~oove around the perlphery thereof9 snid guide groove being arranged to grip around the trunk. The groove, as also the rolls generally, may sultably be provlded with an undulating surface to increase the gripping power thereof. The rolls are pivotally arranged on pivot nrm~ 33 and -, ~ ' .
)220 34 (Figure 4) and are arranged to be urged in a direction towaIds the centre line of the treated trunk section by hydraulic ~ylinders 35 and 36. rhe pressure to be applied agains~ the trunk sec~ion must be significant since outwardly projecting branches must be pressed again~t the side of the trunk. The rolls are operated hydraulically by means of drive chains 49 which permit the pivot arms to pivot around fixed shsfts 37. A certain amo~mt of xesilience is required, however, because the rollers must resiliently follow the contours of the trunk sect~on and the collapsed branches.
In use of the machine, logs are passed from the feed arrangement into ~o the de-branching drum 21, as shown in Figures 5 and 6. The de-branching drum comprise~ the drum body having peripherally arranged around one end thereof hranch eutters 38. The branch cutters are arranged to follow resiliently the peripheral contours of a trunk section. This "springingi' action i8 obtained, for example, by means of a heavy belt 40, and reference 41 indicates a guide.
'rhe cutters 38 are replaceable and in this embodiment six cutters are provided.
The guide 41 i~ guided in turn by a photo cell in a manner to fully open the Gutters 38 when no trunk section is present in the de-branching zone. The drum i8 - .
rotated by means of drive belts extending from the previously mentioned hydraulic or electric motor 16. Part of the trunk is shown at 39 and reference 38a indicates ~o the drum bearings.
The de-branched trunk is fed by the drive rollers 13 and S0 (shown eO
the Iet ln Figure l ) in the direc~ion of the arrow, and is supported during ~his movement by one or more pairs of the suppolt rollers 20. When the drive rollers 13 and 50 are no longer in engagement with the top end of the trunk, the drive i~ taken ovex by a fuxther pair of drive rollers 8 located behmd the de-branching ,. ~` , ' , , ' ' , ~ . .; ' ~ ' . ' ' .
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drum 21, The drive rollers 8 are provided with rubber tyre~? two on each, for moving the trunk section without damage; al~ernatively pegged rollers could be used to prevent damage.
The branches and hlots, together with needles, leave9 and pieces of bark thereon, separated by the cutters 38 of the de-branching drum, are f~d in 9ubstantial alignment by the cleaning roll9 14 conveyor 5 and are then ~ed into the chipper 3 by means of the feed rollers 7. The chipper may ibe of conventional constructioll with a rotating cutting iron opexating at, or substantially a~, righ~ angles to the incoming branches, The chipper 3 i5 conveniently incorporated with a fan, shown o schemaeically at 42 in Figure 1. By means of the fan and a sçreen, it is possible to grade the chips and pine needles when it is re~uired to recover the pine needles separately. Suitably, moveable air -blowing drums may be prov1ded ~:o tr~mRfer tllo chl~)s ~n(l I Lne ncetllo~ ~o ~cl-~r~to conl:n~ner~, Subsequent to the trunk section having passed the drive rollers 8, 3aid secti~m is fed fu~rther along the conveyor path and placed in different heaps, which heaps are subsequently placed in position by the crane 9, ~ :
The top end of the eree i8 cùt by means of the topping device which forcea ~ ~:
down and feeds th0 topped 3ecti~n of ehe tree toward~ the feed roller 30 and . .
- ~ down onto the conveyor belt 59 which moves the said top end towards the chipper, .
~o where it i8 chipped in the same way as the branches.
The control and operating devices oP the base machine are collected in the . operating cabin lO and hlown photo electric devices can be used to simplify operation, I:
~ 11 said operations being mainly restricted to feeding the trunk sections by means of the crane 9 into the base machine and sorting and removing the finished wood.
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By means of a base machine constructed in accordance wlth the invention, forestry proclucts can be recovered effectively in the manner hereinbefore described with a consequent reduction in the work force required.
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When driving on roads and highways, the base machine would be towed by the tractor. The container carriage may then have the form of an additional trailer, When the wheels of the container carriage can be steered, steering of ~he wheels i9 prevented in the transport direction in a known manner.
An embodiment of a base machine according to the present invention will now be described in more detail and with reference to the accompanying drawing;
in which :-Figure 1 is a ~chematic sectional view of the machine, ~O F~gare 2 is a schematic top plan view of the same machine;
Figure 3 is a side view of feed-in means Pigure 4 is a schematic top plan view of the same means;
~igure 5 is a ~chematic sectio~al view of the de-branching drum of the base machine; and Figure 6 is a section through the de-branching drum.
Referring to the drawingt the base machine comprises a chassis 1 and a further chassis 2 arranged on said chassis 1. The part referenced 3 contains a chipper having an outlet pipe 17 (~ee ~igure 2) for chips produced, whilst the reference 4 identifies a motor for driving the working parts of the base machine, o20 said mo~or suitably being a diesel motor and developing around 200-300 hp.
Conveyor means are provided 6uitably in the form of a belt conveyor 5 with support rollers 6, and press rolls 7 are provided for feeding removed branches and the like towards the conveyor belt. A pair of feed rolls 8 are provided for de-branched trunk sections and an ex~ensible crane 9 is also provided operable from a cabin 10.
Arranged at the loading end of the base machine are drive rolls 13 provlded ' -: :
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with a guide ~roove for an infecl trunk section. Obliquely positioned cleaning rolls 14 are arranged behind the rolls 13 and behind the rolls 14 are arranged de-branching knives 15 which are provided on a de-branching drum 21 which is .
rotatably mounted and driven by a hydraulic or electric motor 16, or the like, via a belt transmission.
Arranged at the loading, or in-feed end of the machine are topping shears 22, a pressure roll 23 arranged to press branches and the like t~gether~
and a separate drive roll 30 having a protective plate 32 for the topped portion 32 of the tree tO be fed ~o the chipper 3.
The d~ive motor 4 of the base machine operates via a belt transmission 19 on a hydraulic pump 18 and, optionally, directly on the chipper 3.
Further elements of the machine include an inner shield plate 24, a hydraulic cylinder 11 for the topping shears 22 and a further shield plate 12.
Support means ~or the hydraulic cylinder il are shown st 25 and a tank for the hydraulic oil is shown at 26. A fuel tank 28 i9 provided for the vehicle as well ns a locntion for a tool box 27, both items being accommodated within thn outer -confines of the ba~e machine. Support rollers 20 are provided for the ~reàted nnd discharged tr~k ~ection, as well a~ a hoolk 29 to facilitate transportntion of ~;
the machine.
~ igures 3 and 4 show schematically the in-feed machinery of the base machine, Thi~ machinery comprises two pairs of rolls 13 and 50 respectively, each of which hns a deep V-shaped guide ~oove around the perlphery thereof9 snid guide groove being arranged to grip around the trunk. The groove, as also the rolls generally, may sultably be provlded with an undulating surface to increase the gripping power thereof. The rolls are pivotally arranged on pivot nrm~ 33 and -, ~ ' .
)220 34 (Figure 4) and are arranged to be urged in a direction towaIds the centre line of the treated trunk section by hydraulic ~ylinders 35 and 36. rhe pressure to be applied agains~ the trunk sec~ion must be significant since outwardly projecting branches must be pressed again~t the side of the trunk. The rolls are operated hydraulically by means of drive chains 49 which permit the pivot arms to pivot around fixed shsfts 37. A certain amo~mt of xesilience is required, however, because the rollers must resiliently follow the contours of the trunk sect~on and the collapsed branches.
In use of the machine, logs are passed from the feed arrangement into ~o the de-branching drum 21, as shown in Figures 5 and 6. The de-branching drum comprise~ the drum body having peripherally arranged around one end thereof hranch eutters 38. The branch cutters are arranged to follow resiliently the peripheral contours of a trunk section. This "springingi' action i8 obtained, for example, by means of a heavy belt 40, and reference 41 indicates a guide.
'rhe cutters 38 are replaceable and in this embodiment six cutters are provided.
The guide 41 i~ guided in turn by a photo cell in a manner to fully open the Gutters 38 when no trunk section is present in the de-branching zone. The drum i8 - .
rotated by means of drive belts extending from the previously mentioned hydraulic or electric motor 16. Part of the trunk is shown at 39 and reference 38a indicates ~o the drum bearings.
The de-branched trunk is fed by the drive rollers 13 and S0 (shown eO
the Iet ln Figure l ) in the direc~ion of the arrow, and is supported during ~his movement by one or more pairs of the suppolt rollers 20. When the drive rollers 13 and 50 are no longer in engagement with the top end of the trunk, the drive i~ taken ovex by a fuxther pair of drive rollers 8 located behmd the de-branching ,. ~` , ' , , ' ' , ~ . .; ' ~ ' . ' ' .
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drum 21, The drive rollers 8 are provided with rubber tyre~? two on each, for moving the trunk section without damage; al~ernatively pegged rollers could be used to prevent damage.
The branches and hlots, together with needles, leave9 and pieces of bark thereon, separated by the cutters 38 of the de-branching drum, are f~d in 9ubstantial alignment by the cleaning roll9 14 conveyor 5 and are then ~ed into the chipper 3 by means of the feed rollers 7. The chipper may ibe of conventional constructioll with a rotating cutting iron opexating at, or substantially a~, righ~ angles to the incoming branches, The chipper 3 i5 conveniently incorporated with a fan, shown o schemaeically at 42 in Figure 1. By means of the fan and a sçreen, it is possible to grade the chips and pine needles when it is re~uired to recover the pine needles separately. Suitably, moveable air -blowing drums may be prov1ded ~:o tr~mRfer tllo chl~)s ~n(l I Lne ncetllo~ ~o ~cl-~r~to conl:n~ner~, Subsequent to the trunk section having passed the drive rollers 8, 3aid secti~m is fed fu~rther along the conveyor path and placed in different heaps, which heaps are subsequently placed in position by the crane 9, ~ :
The top end of the eree i8 cùt by means of the topping device which forcea ~ ~:
down and feeds th0 topped 3ecti~n of ehe tree toward~ the feed roller 30 and . .
- ~ down onto the conveyor belt 59 which moves the said top end towards the chipper, .
~o where it i8 chipped in the same way as the branches.
The control and operating devices oP the base machine are collected in the . operating cabin lO and hlown photo electric devices can be used to simplify operation, I:
~ 11 said operations being mainly restricted to feeding the trunk sections by means of the crane 9 into the base machine and sorting and removing the finished wood.
, -8- ~ ~:
-- 10713Z2~ :
By means of a base machine constructed in accordance wlth the invention, forestry proclucts can be recovered effectively in the manner hereinbefore described with a consequent reduction in the work force required.
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Claims (6)
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. Method of treating a felled tree comprising feeding the tree longitudinally with its root end leading, to a debranching station in which the tree is debranched near the bark and the debranched trunk of the tree is recovered, and, during the feeding of the tree, pressing the branches and twigs against the trunk with the tops of said branches and twigs pointing towards the top of the tree so that after the tree has been debranched and as a result of the pressing operation branches and twigs are substantially aligned in parallel, and feeding the branches and twigs to a chipper without changing the parallel alignment.
2. Apparatus for carrying out the method according to claim 1 comprising a motor driven feed mechanism adapted to feed a tree or parts thereof in its longitudinal direction with the root end leading, said mechanism being arranged to cooperate with a debranching unit in which the tree is debranched close to the bark, characterized in that the feed mechanism is arranged to press the branches and twigs along the trunk of the tree with the tops of said branches and twigs pointing towards the top of the tree so that the branches and twigs will be substantially parallelly aligned after the tree trunk has passed through the debranching unit, and further comprising conveyor means for feeding branches and twigs separated from the trunk, during unchanged alignment to a chipper where the branches and twigs are chipped substantially perpendicular to said alignment, and for conveying the debranched tree trunk after its passage through the debranching unit.
3. Apparatus according to Claim 2, wherein said conveyor means are adapted to collect and convey branches and twigs with the ends of the larger diameter, leading, and the chipper has cutting devices which act on the branches and twigs substantially at right-angles to their substantially aligned feed direction,
4. Apparatus according to Claim 2, wherein the feed mechanism comprises a multiplicity of drive rolls having grooves therein for the trunks, the rolls being arranged in pairs and adapted to be pressed against the trunk to be worked under a pressure of such magnitude that the branches and twigs are caused to lie substantially flat along the trunk.
5. Apparatus according to Claim 2 further comprising means arranged to de-top a tree, and a drive roll arranged to urge the top when severed towards the conveyor means such that said top together with branches and twigs are conveyed to the chipper.
6. A base machine for on-site recovery of forestry products, comprising a motor-driven feed mechanism for conveying a tree or part thereof in the direction of its longitudinal axis,which tree or part thereof has its root end leading,means for pressing the branches and twigs thereon towards the trunk of the tree so as to lie along said trunk with the ends of the twigs and branches extending towards the top of the tree, rotary de-branching means which co-act with the feed mechanism for separating the branches and twigs from the trunk of the tree as close to the trunk as possible, a cleaning roller arrangement which co -acts with the de-branching mechanism for feeding branches and twigs separated from the trunk in a substantially aligned direction, conveyor means for collecting said aligned branches and twigs, press-rollers co-acting with the conveyor means for transporting said branches and twigs, whilst maintaining their alignment, to a chipper whereby the in-feed direction of the branches and twigs is substantially perpendicular to a plane in which cutters within the chipper operate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA266,769A CA1070220A (en) | 1976-11-29 | 1976-11-29 | Forestry machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA266,769A CA1070220A (en) | 1976-11-29 | 1976-11-29 | Forestry machines |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1070220A true CA1070220A (en) | 1980-01-22 |
Family
ID=4107390
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA266,769A Expired CA1070220A (en) | 1976-11-29 | 1976-11-29 | Forestry machines |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1070220A (en) |
-
1976
- 1976-11-29 CA CA266,769A patent/CA1070220A/en not_active Expired
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