WO2007028959A1 - Outil d’arboriculture - Google Patents

Outil d’arboriculture Download PDF

Info

Publication number
WO2007028959A1
WO2007028959A1 PCT/GB2006/003227 GB2006003227W WO2007028959A1 WO 2007028959 A1 WO2007028959 A1 WO 2007028959A1 GB 2006003227 W GB2006003227 W GB 2006003227W WO 2007028959 A1 WO2007028959 A1 WO 2007028959A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
arborist
housing
tree
engaging
Prior art date
Application number
PCT/GB2006/003227
Other languages
English (en)
Inventor
Reg Coates
Original Assignee
Reg Coates
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 Reg Coates filed Critical Reg Coates
Publication of WO2007028959A1 publication Critical patent/WO2007028959A1/fr

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
    • A01G23/099—Auxiliary devices, e.g. felling wedges

Definitions

  • This invention relates to arborist tools, and in particular to tools for use in felling trees.
  • An opening device is then inserted into the back cut to widen it and cause the tree to tilt.
  • Many devices are in use or have been proposed for opening the sawcut.
  • a long narrow blade of a simple lever device having a long handle attached to the blade may be inserted into the cut, and by forcing the free end of the handle downwardly, the cut is opened.
  • Levers of this type are described in GB 2008916 and DE 10302181. By this means, the tree section may be tilted until the hinge breaks and the tree falls either freely or by being pulled by a rope from the ground.
  • the force required may be greater than can be applied by a person.
  • a tapered wedge device into the partly opened sawcut and to drive the wedge device, e.g. by means of a hammer, into the sawcut to effect the further tilting of the tree section.
  • Wedge devices may be advanced into the sawcut by mechanical means, and wedge devices of this type are disclosed in US 3754582 and FR 2846514.
  • a pair of shims is inserted in the sawcut and the wedge device, which is attached to the shims by a chain, is inserted between the shims.
  • a jacking device, to which the chain is attached, is operated to draw the wedge device further between the shims to force open the sawcut.
  • a screw threaded conical body is inserted in the sawcut and rotated by a ratchet mechanism to screw the body into the sawcut to open it until the tree section falls.
  • a ratchet mechanism to screw the body into the sawcut to open it until the tree section falls.
  • a single cut is made through the tree to form a cut "slab” or "block” which is pushed laterally of the standing trunk to fall or be lowered adjacent the trunk.
  • the height of each successive slab must be short to reduce the weight of the slab and hence the friction force to be overcome in pushing the slab off the trunk.
  • the invention provides an arborist tool comprising a housing, means adapted to engage a standing trunk of a tree having a severed part or slab above a sawcut extending through the tree, means for advancing the housing relative to the standing trunk, and pusher means disposed above the engaging means and operable to push the slab laterally relative to the standing trunk as the housing advances relative thereto.
  • the engaging means may comprise means adapted to engage the standing trunk on the underside of the sawcut.
  • the engaging means may comprise a wheel having tree-penetrating devices disposed around the periphery thereof.
  • the tree-penetrating devices may comprise spikes or teeth.
  • the engaging wheel may be mounted in the housing.
  • the advancing means may comprise drive means adapted to drive the engaging wheel in rotation.
  • the drive means may comprise a chain engaging a toothed wheel mounted in the housing for rotation with the engaging wheel.
  • the drive means may also comprise a toothed drive sprocket also mounted in the housing and engaged by the chain.
  • the drive sprocket may be connected to a ratchet wheel for rotation therewith.
  • a ratchet pawl may be mounted on the housing to engage the ratchet wheel.
  • An operating handle may be attached to the ratchet pawl whereby movement of the operating handle in one direction drives the ratchet wheel and drive sprocket in rotation.
  • the operating handle may be pivotally mounted on the housing, and may be telescopic or detachable from the housing.
  • the operating handle and ratchet pawl may be movable relative to the housing whereby the ratchet pawl may be disengaged from the ratchet wheel.
  • the pusher means may comprise a bar mounted on the top of the housing and extending in the direction of the engaging means. At least one cutting rib may be provided on an upper surface of the housing to cut a groove in the slab.
  • the invention may also comprise a lever device for opening the sawcut.
  • the lever device may comprise a blade and a lever handle.
  • the blade may have a width dimension that is at least equal to the length dimension.
  • the lever handle may extend substantially perpendicular to the blade, and may have a cranked section remote from the blade. The cranked section may extend in the direction of the width of the blade.
  • the lever handle may be telescopic or detachable from the blade.
  • the lever handle may have, at an end remote from the blade, attachment means adapted to attach the lever device to a belt of an operator.
  • the invention also comprises a method of felling a tree comprising making a sawcut through a tree to form a standing trunk and an upper severed part or slab of the tree disposed thereabove, engaging with the standing trunk an arborist tool having a housing, engaging means and pushing means disposed thereabove, advancing the housing relative to the standing trunk to engage the pushing means with the slab and to push the slab laterally relative to the standing trunk as the housing advances relative thereto.
  • the method may comprise inserting a lever device into the sawcut and rotating the lever to open the sawcut prior to engaging the arborist tool with the standing trunk.
  • a blade of the lever device is inserted into the sawcut and a handle that is attached to the blade is rotated about an axis extending longitudinally of the blade to open the sawcut.
  • the method may comprise engaging the arborist tool with the standing trunk on the underside of the sawcut.
  • Fig. 1 is a partly sectioned side view of an arborist tool
  • Fig. 2 is an underplan view of the tool of Fig. 1
  • Fig. 3 is a perspective view of a lever device
  • Fig. 4 is a scrap view of an alternative operating handle arrangement.
  • an arborist tool 10 having a housing 11.
  • the housing 11 has an upper surface 12 that extends forwardly further than a lower surface 13.
  • Mounted at the forward end of the housing 11 is an engaging means 14.
  • the engaging means 14 comprises engaging wheels 15 having tree-penetrating spikes or teeth 16 around their peripheries.
  • the spikes or teeth 16 extend from the housing 11 beneath the lower surface 13 and bite into the standing trunk 17 of a tree 18 when the tool 10 is introduced into a sawcut 19 made through the tree 18.
  • the spikes or teeth 18 bite into the underside 20 of the sawcut 19, whilst a severed part or slab 21 of the tree 18 is shielded from the spikes or teeth 18 by the upper surface 12 of the housing 11.
  • the engaging wheels 15 are mounted in side-by-side disposition on a spindle 22, which is rotatably mounted in the housing 11. Also mounted on the spindle 22 are sprockets 23 around which chains 24 pass. The chains 24, supported and guided by jockey wheels 38, also pass around drive sprockets 25 mounted on a drive spindle 26 itself rotatably mounted in the housing 11. Also mounted on the drive spindle 26 are ratchet wheels 27.
  • An operating handle 28 is mounted on the housing 11 to pivot about the axis of drive spindle 26, as shown by arrow A. The operating handle 28 is telescopic, or alternatively may be detachable from the housing 11 , for transportation and/or storage.
  • ratchet pawls 29, disposed to engage the ratchet wheels 27 Attached to the operating handle 28 are ratchet pawls 29, disposed to engage the ratchet wheels 27.
  • a tubular rubber guard sleeve 40 (shown in dashed lines) to protect the operator from injury from the drive spindle 26 and drive sprockets 25.
  • Rotation of the operating handle 28 in an upward direction causes rotation of the drive spindle 26 and drive sprockets 25 in an anti-clockwise direction. This causes the chains 24 to move and rotation of the sprockets 23, spindle 22 and engaging wheels 15, also in an anti-clockwise direction.
  • This rotation of the engaging wheels 15 causes the spikes or teeth 18 to "walk" along the underside 20 of the sawcut 19, in turn causing the tool 10 to advance towards the tree 18.
  • the ratchet pawls 29 ride over the ratchet wheels 27 so that rotation of the operating handle 28 in a downward direction does not move the tool 10.
  • Repeated action of the operating handle 28 moves the tool 10 towards the tree 18 until a pusher bar 30 mounted on a pusher support part 35 of housing 11 engages the slab 21 of the tree 18.
  • the tool 10 reduces surface friction and allows much greater force to be used to remove the slab 21.
  • a lateral handle 36 is attached in use to the pusher support part 35, one part of lateral handle 36 having a screw that is screwed into a tapped bore of the other part of lateral handle 36. This enables lateral handle 36 to be removed for transportation and storage.
  • a guard disc 37 On each side of the lateral handle 36 is a guard disc 37.
  • a lifting handle 42 Above the pusher bar 30 is provided a lifting handle 42 to facilitate lifting and carrying the tool 10.
  • the sawcut 19 In order to place the front of the tool 10 in the sawcut 19, the sawcut 19 must be opened. This may be effected by using any of the known lever or wedge devices. However, it may conveniently be achieved by using a lever device 31 as shown in Fig. 3.
  • the lever device 31 comprises a blade 32 and a lever handle 33.
  • the blade 32 has a width dimension W that is at least equal to the length dimension L, and has a sharp point 43 on its upper surface to engage the slab 21.
  • the lever handle 33 extends substantially perpendicular to the blade 32, and has a cranked section 34 remote from the blade 32.
  • the cranked section 34 extends in the direction of the width of the blade 32.
  • the lever handle 33 is telescopic, or detachable from the blade 32, for transportation and/or storage, and the separate parts of the lever handle 33 are secured by a securing bolt 39.
  • the blade 32 is inserted in the sawcut 19 and a force is applied to the cranked section 34 to rotate the lever device 31 in the direction of arrow B about the axis C extending longitudinally of the blade 32. It has been found that the necessary force to raise heavy slabs 21 to open the sawcut 19 in order to introduce the tool 10 therein can be more readily applied using the lever device 31 than when using known lever devices.
  • the force required to maintain this position of the lever device 31 is minimal.
  • a hole 44 is provided in the lever handle 33, into which a peg 45 may be inserted.
  • the peg 45 will abut the slab 21 so that the lever device 31 does not rotate backwards and lower the slab 21 if the operator then wishes to use both hands to position the arborist tool 10 in the open sawcut 19.
  • the peg 45 is located with the lever device 31 in a clip 46, and is secured to the lever device 31 by a retaining chain or wire 47.
  • An attachment ring 48 is provided on the lever handle 33 at the end remote from the blade 32, to enable an operator to attach the lever device 31 to his/her belt.
  • the engaging means may be in the form of a band passing around the standing trunk of the tree, or gripper means adapted to engage the standing trunk at opposed sides thereof.
  • the ratchet pawls 29 may be attached to the outer part of the operating handle 28a as shown in Fig. 4. In this arrangement, when the outer part 28a of the operating handle 28 is extended beyond a normal operating position, the ratchet pawls 29 are disengaged from the ratchet wheels 27. This enables the operating handle 28 to be moved downwardly to a "tool folded" configuration for transportation and storage.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Forests & Forestry (AREA)
  • Environmental Sciences (AREA)
  • Handcart (AREA)

Abstract

La présente invention concerne un outil d’arboriculture (10) qui est prévu pour déplacer un bloc découpé d’un tronc d’arbre (17) au-dessus d’une coupe de scie (19) qui s’étend à travers l’arbre (18). L’outil (10) possède un logement (11), des moyens (14) qui entrent en prise avec le tronc vertical (17), des moyens (23, 24, 25) pour faire avancer le logement (11) par rapport au tronc vertical (17), et une barre directrice (30) disposée au-dessus des moyens d’entrée en prise (14). Une poignée de commande (28) reliée à des cliquets à rochet (29) est actionnée pour faire tourner des roues à rochet (27), des pignons d’entraînement (25) montés sur le même arbre (26) que les roues à rochet (27), et des chaînes d’alimentation (24) sur des pignons (23). Les pignons (23) sont montés sur le même arbre (22) que des roues dentées d’entrée en prise (15) dont les dents (16) mordent le tronc vertical (17) pour faire avancer l’outil (10) lorsque la poignée de commande (28) est déplacée en va-et-vient. La barre directrice (30) entre en prise avec le bloc (21) et le pousse latéralement par rapport au tronc vertical (17) lorsque le logement (11) est avancé par rapport à celui-ci. Un dispositif de levier (31) est également prévu pour ouvrir la coupe de scie (19).
PCT/GB2006/003227 2005-09-08 2006-09-01 Outil d’arboriculture WO2007028959A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0518296A GB0518296D0 (en) 2005-09-08 2005-09-08 Arborist tool
GB0518296.9 2005-09-08

Publications (1)

Publication Number Publication Date
WO2007028959A1 true WO2007028959A1 (fr) 2007-03-15

Family

ID=35221086

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2006/003227 WO2007028959A1 (fr) 2005-09-08 2006-09-01 Outil d’arboriculture

Country Status (2)

Country Link
GB (1) GB0518296D0 (fr)
WO (1) WO2007028959A1 (fr)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754582A (en) 1971-10-12 1973-08-28 C Emerson Tree felling device
GB1507749A (en) * 1975-08-29 1978-04-19 Dushku V Manually operated jack for use in tree felling
GB2008916A (en) 1977-11-30 1979-06-13 Sandvik Ab Felling bar
GB2029797A (en) * 1978-09-15 1980-03-26 Dushku V Tree Felling Jack
DE9203047U1 (fr) * 1992-03-07 1992-05-07 Gebr. Ortlieb Gmbh, 7000 Stuttgart, De
FR2764771A1 (fr) * 1997-06-20 1998-12-24 Armand Morel Coin articule pour l'abattage des arbres
FR2846514A1 (fr) 2002-10-31 2004-05-07 Joseph Clochard Dispositif de manoeuvre pour le basculement controle d'une portion de tronc debite
DE10302181A1 (de) 2003-01-22 2004-08-05 Ketzler, Wolfgang Mechanischer Hebelfällkeil mit Drehhaken

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3754582A (en) 1971-10-12 1973-08-28 C Emerson Tree felling device
GB1507749A (en) * 1975-08-29 1978-04-19 Dushku V Manually operated jack for use in tree felling
GB2008916A (en) 1977-11-30 1979-06-13 Sandvik Ab Felling bar
GB2029797A (en) * 1978-09-15 1980-03-26 Dushku V Tree Felling Jack
DE9203047U1 (fr) * 1992-03-07 1992-05-07 Gebr. Ortlieb Gmbh, 7000 Stuttgart, De
FR2764771A1 (fr) * 1997-06-20 1998-12-24 Armand Morel Coin articule pour l'abattage des arbres
FR2846514A1 (fr) 2002-10-31 2004-05-07 Joseph Clochard Dispositif de manoeuvre pour le basculement controle d'une portion de tronc debite
DE10302181A1 (de) 2003-01-22 2004-08-05 Ketzler, Wolfgang Mechanischer Hebelfällkeil mit Drehhaken

Also Published As

Publication number Publication date
GB0518296D0 (en) 2005-10-19

Similar Documents

Publication Publication Date Title
CA2473488C (fr) Dispositif d'elagage
US5074047A (en) Anti-pinch device for chain saw
US5921302A (en) Method and apparatus for tree stump clearing
US11027954B2 (en) Multipurpose device
US5671788A (en) Tree and stump extractor
US4525929A (en) Cutting device
US4148462A (en) Tree felling device
WO2007028959A1 (fr) Outil d’arboriculture
US20190191640A1 (en) Method of felling a tree
JP4099581B2 (ja) 樹木の立ち枯らし用皮剥機
US4269393A (en) Tree-felling lever
US5797437A (en) Log peeler
CA2488702A1 (fr) Belier d'abattage
CA2201828A1 (fr) Engin d'abattage submersible
KR200203346Y1 (ko) 수목 관리장치
AU765571B2 (en) A tool for manipulating circlips
AU7823901A (en) Long handled pruning saw
JPH0719242Y2 (ja) 掴持装置付鋏具
FR2846514A1 (fr) Dispositif de manoeuvre pour le basculement controle d'une portion de tronc debite
US6959768B1 (en) Weed plucker
FR2473397A1 (fr) Dispositif pour fendre des buches
CN107360871B (zh) 线路走廊清理装置
CA2181629A1 (fr) Appareil et methode de dessouchage
KR950005159Y1 (ko) 수동식 나무가지 절단기
US6591595B1 (en) Brush cutter and method

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 06779249

Country of ref document: EP

Kind code of ref document: A1