WO2001087050A1 - Dispositif de lame de scie pour lutte antifongique - Google Patents

Dispositif de lame de scie pour lutte antifongique Download PDF

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Publication number
WO2001087050A1
WO2001087050A1 PCT/SE2001/000902 SE0100902W WO0187050A1 WO 2001087050 A1 WO2001087050 A1 WO 2001087050A1 SE 0100902 W SE0100902 W SE 0100902W WO 0187050 A1 WO0187050 A1 WO 0187050A1
Authority
WO
WIPO (PCT)
Prior art keywords
strip
guide bar
groove
arrangement according
stump
Prior art date
Application number
PCT/SE2001/000902
Other languages
English (en)
Inventor
Rolf Gustafsson
Original Assignee
Rolf Gustafsson
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 Rolf Gustafsson filed Critical Rolf Gustafsson
Priority to AU2001252821A priority Critical patent/AU2001252821A1/en
Publication of WO2001087050A1 publication Critical patent/WO2001087050A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B17/00—Chain saws; Equipment therefor
    • B27B17/02—Chain saws equipped with guide bar
    • B27B17/025—Composite guide bars, e.g. laminated, multisectioned; Guide bars of diverse material
    • 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
    • A01G23/091—Sawing apparatus specially adapted for felling trees
    • 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

  • the present invention relates generally to a saw guide bar arrangement, and more particularly to a saw guide bar arrangement adapted for an endless saw chain and provided with means for dispersing, during a tree cutting operation, fungicidal liquid over the upper surface of the tree stump resulting from said tree cutting operation.
  • the saw guide bar arrangement of the kind concerned is comprised gen- erally of a guide bar, or guide plate, that has a saw-chain adapted edge-related groove and mutually opposing planar side surfaces.
  • the surface that lies proximal to the upper surface of the stump formed during a tree cutting cycle includes a recess or groove in which there is placed a perforated device through which a fungicidal liquid can be dispersed over the cut surface of a tree stump formed during a tree cutting cycle, e.g. a spruce cutting cycle.
  • Patent Publications WO-A 1-90/07870 and US-A-5,797,187 are of interest in this field of application.
  • the present invention is founded, more particularly, on a saw blade guide bar arrangement in which one of two planar side surfaces, i.e. the surface that lies proximal to the tree stump, includes a recess or groove in which there is placed a perforated device through which fungicidal liquid can be dispersed during a tree cutting cycle over the cut surface of the stump formed during said cycle.
  • the need to coat the cut surface of the stump with a fungicidal liquid is based on the insight that the presence of such a liquid will prevent fungi and fungal spores from fastening to the upwardly facing cut surface of the stump. It has been found that certain fungal spores in a spruce community have the tendency to penetrate down into the root system of the stump and therewith contribute towards the development of root decay.
  • Previously known guide bar arrangements of the kind intended here for dispersing fungicidal liquid are based on providing on one of the side surfaces of the guide bar, the surface that lies proximal to the stump surface, with a recess or groove in which there is placed a perforated device, a plastic hose having a cross-sectional area in the order of 3 mm 2 , wherein fungicidal liquid is forced through the perforations.
  • the perforated device in the form of a plastic hose, has been found to cause difficulties with respect to the precision in which the perforations, or holes, are formed. Moreover, a fungicidal liquid introduced into the plastic hose tends to thicken and therewith contribute towards successive sealing or clogging of the perforations.
  • a lid (13) which includes a number of holes (17) disposed in a row for the passage of oil.
  • a channel-forming cover strip or cover plate (23) is inserted into the groove and co-acts with adjacent recesses (22) such as to form a channel or pas- sageway (18) between the openings (22) for the passage of oil or lubricant.
  • each of the lids (13) is provided with a surrounding edge (13a) orientated at right angles to the planar surface (13b) of the lid (13), said edge (13a) merging with an inner bevelled edge-portion (13c).
  • Figure 3 tends to give the impression that there is only one bevelled edge- portion (16), which is thought to be the most suitable.
  • At least some of the recesses are filled with a porous material and some of the recesses can function as an oil reservoir and an oil passageway.
  • the recesses, or cut-outs, are formed with the intention of obtaining a guide plate construction that is lighter than an homogenous structure.
  • This prior publication teaches a colour marking arrangement in the guide bar of a multi-process machine, said arrangement including a guide bar (1) having holders (6, 7) and a pipe system (4) adapted to the guide bar.
  • the pipe system (4) is formed as a component (4, 9, 10) separate from the guide bar and is designed to be placed in the guide bar in a space intended to this end.
  • Another technical problem is one of realising the significance of and the advantages associated with forming said perforated device from a thin elongate strip.
  • Another technical problem is one of realising the significance of allowing said recess to have edge-related support surfaces that are adapted for co-action with edge-proximal portions of the strip.
  • Yet another technical problem is one of realising the significance of and the advantages afforded by allowing said support surface to be located at a depth which is greater than the thickness of the strip.
  • Another technical problem is one of realising the significance of and the advantages associated with adapting said depth so as to enable the resultant recess or groove to contribute towards turbulent distribution and disintegration of the fungicidal liquid over the exposed upper surface of the stump.
  • a further technical problem is one of realising the significance of and the advantages afforded by allowing the ratio of support-surface depth to strip thickness to lie between 2 and 1.1.
  • Still another technical problem is one of realising the significance of and the advantages associated with allowing the strip to be made from a material that has properties resistant to the fungicide liquid, such as Bakelite.
  • Another technical problem is one of realising the significance of and the advantages associated with adapting the groove width allocated to the saw chain to a size which is slightly greater than the thickness of the guide bar or guide plate, such as a thickness in the range of 2-6 mm, such as about 3 mm.
  • Another technical problem is one of realising the significance of and the advantages associated with giving the groove an adapted cross-sectional area, such as an area of between 10 and 25 mm 2 , for instance about 15 mm 2 .
  • Another technical problem is one of realising the significance of and the advantages associated with fastening said strip to said side surfaces with the aid of an adhesive layer, such as a glue layer or some similar layer.
  • Yet another technical problem is one of realising the significance of and the advantages associated with giving the holes or perforations a size which, among other things, is dependent on the distance between said holes, such as a diameter or cross-dimension of 0.5 to 2 mm, for instance a diameter of 0.8-1.2 mm.
  • Another technical problem is one of realising the significance of and the advantages that are gained by spacing said holes apart at a distance which relates to different criteria, such as a distance of 5-20 mm, for instance 8-12 mm.
  • Still another technical problem is one of realising the significance of and the advantages that are gained by forming in the guide bar a groove that has a straight centre portion and angled from straight side-portions so as to follow the peripheral edge of the guide bar or guide plate.
  • the present invention takes as its starting point a saw blade guide bar arrangement adapted for an endless saw chain and comprising a guide bar or guide plate that has an edge-related groove adapted for the saw chain and mutually opposing planar side surfaces of which one, a stump-proximal surface, is provided with a groove or recess in which there is placed a perforated device through which, during a tree cutting cycle, a fungicidal liquid can be dispersed over a cut surface of the stump formed during said tree cutting cycle.
  • the perforated device shall have the form of a strip, and that said groove shall have edge-related support surfaces adapted for co-action with edge-proximal portions of the strip, and that the depth of the support surfaces in the guide bar exceeds the thickness of the strip.
  • said support surfaces shall be located at a depth that exceeds the thickness of the strip, and that the ratio of the depth of said support surface to the thickness of the strip will preferably be chosen to lie between 2 and 1.1.
  • the strip is made of a material that has properties resistant to the fungicidal liquid, such as Bakelite.
  • the groove width allocated to the saw chain is only slightly larger than the thickness of the guide bar or guide plate, within a range of 2-6 mm.
  • the groove has a cross- sectional area of between 10 and 25 mm 2 , such as about 15 mm 2 .
  • said holes are preferably given a diameter of 0.5 to 2 mm, such as a diameter of 0.8-1.2 mm.
  • said groove is comprised of a straight central portion and angled, straight side portions.
  • Figure 1 is a side view of a forest harvester with which there is used a saw guide bar arrangement according to the invention
  • Figure 2 is a side view of a trunk-gripping arrangement, and shows a crosscut kerf made by a saw chain beneath said gripping arrangement
  • Figure 3 is a perspective view of a tree stump with the upwardly facing cut surface exposed
  • Figure 4 is a plan view of a first embodiment of a saw guide bar arrangement
  • Figure 5 is a plan view of a second saw guide bar arrangement
  • Figure 6 is a sectioned view taken through the saw guide bar in the proximity of a groove and a perforated strip affixed thereto; and
  • Figure 7 is a sectioned view of a saw guide bar and saw chain in the process of making a cross-cut kerf through the trunk of a spruce.
  • Figure 1 is a side view of a forest harvester 1 which includes manoeuvra- ble arms 2 that carry at their outer end 2a a gripping arrangement 3 and a saw chain arrangement 4 disposed beneath the gripping arrangement 3.
  • Figure 1 also shows a tree 5, a spruce, which has been cut to leave a stump 7.
  • Figure 2 illustrates how the gripping arrangement 3 is adapted to firmly grip a tree trunk, a spruce trunk 5.
  • the figure also shows a cut surface 5a and cut surface 7a formed respectively on the trunk and the stump by the saw chain arrangement 4, and also the stump 7 that remains after cutting through the trunk.
  • the stump 7 is shown in perspective in Fig. 3, from which the top surface cut 7a on the stump formed by the cutting cycle can be seen.
  • Figure 4 is a plan view of a saw blade guide bar arrangement 40 adapted for an endless saw chain (not shown) and comprising a saw guide bar 41 that includes a saw chain-adapted and edge-related grooves 42, 43 and mutually opposing planar side surfaces 44, 44a, of which the surface 44a is hidden from view and constitutes the surface that faces upwards during the tree cutting cycle.
  • the surface referenced 44 that lies proximal to the stump surface includes a groove or recess 45 in which there is accommodated a device 46 that includes holes or perforations 47 through which a liquid fungicide is intended to pass during a trunk cutting cycle and to disperse in a layer 8 over the cut surface 7a of the stump formed by the cutting cycle.
  • the groove 45' includes a straight centre portion 45a and angled, straight side-portions 45b and 45c.
  • Figure 6 is a sectional view through that part of the saw guide bar arrangement 40 which includes the groove or recess 45 and the perforated device 46 that lies sealingly in the groove 45.
  • the perforated device 46 is comprised of a strip of rectangular cross-section, where the ratio of the width "b" to the thickness "t" of said strip is chosen within the range of 15 to 1 , such as between 5 to 1 and 7 to 1.
  • the strip has a thickness "t" of 0.8 and 1.2 mm, such as about 1 mm, and a width "b" of between 10 and 20 mm, such as about 12 mm.
  • the groove 45 includes edge-related support surfaces 45a, 45b which are adapted for co-action with edge-adjacent portions 46a, 46b of the strip.
  • the edge-related support surfaces 45a, 45b may have a width of 2 to 4 mm, such as about 3 mm.
  • the distance of the support surfaces 45a, 45b from the planar side surface 44 is referenced “d” and it will be seen that the support surfaces 45a, 45b are positioned at a distance from the surface 44 that exceeds the thickness of the strip 46, in other words "d" is slightly greater than "t".
  • the ratio between the depth "d" of the support surface and the thickness "t" of the strip is between 2 and 1.1.
  • the strip 46 is made from a material that is resistant to the fungicidal liquid (in other words the material shall not have a catalytic effect that will cause the liquid to thicken in and around the perforations).
  • Bakelite which has been found in practice to have these properties, is particularly proposed in this regard.
  • a groove width "s" associated with the saw chain is adapted to accommodate the thickness "e" of the saw guide bar, and it is proposed that a selected dif- ference shall lie in a range of 2-6 mm.
  • the cross-sectional area of the groove 45 beneath the strip 46 is between 10 and 25 mm 2 , such as about 15 mm 2 .
  • the groove or recess has a width "f" of 5 mm and a depth "g” of 3 mm.
  • the strip 46 is secured to the support surfaces 45a, 45b by means of an adhesive layer 46', such as glue or some corresponding substance.
  • the holes or perforations 47 have a diameter or cross-section "h" of 0.5 to 2 mm, such as 0.8-1.2 mm, and are either punched or drilled with smooth through- penetrating surfaces.
  • the hole diameter may be 1.0 mm.
  • the holes are spaced apart by a distance "k" corresponding to between 5 and 20 mm, such as 8-12 mm.
  • the choice of hole diameter "h”, the distance “k” between said holes and the distance between the groove width "s” of the saw chain and the thickness "e” of the saw guide bar are adapted in relation to each other so that at a predeter- mined pressure (generated by means not shown) in respect of the fungicidal liquid 50, said fungicidal liquid will be dispersed at reference 50' and therewith not only cover the stump surface 7a but also form thereon a layer or coating 8 of adapted thickness.
  • the space formed adjacent the strip within the guide bar, or guide plate, and the space adjacent the upper surface of the stump form a turbulence zone for effective distribution of the liquid applied, either in droplet form or in mist form.
  • the saw blade guide bar 40 When the saw blade guide bar 40 can be swung about a pivot centre during a tree cutting operation, it may be appropriate to allow the diameter of the holes to vary increasingly towards an increasing swing radius and/or to vary the distance between mutually adjacent holes decreasingly towards an increasing swing radius, and so on, in order to obtain a layer 8 of essentially constant thickness.
  • the fungicidal liquid 50 is delivered to the groove 45 through a channel (not shown) located at the point of attachment 40a of the saw blade guide bar.
  • a channel located at the point of attachment 40a of the saw blade guide bar.
  • the volume of fungicidal liquid 50 required to form the layer 8 is stored in the groove 45, this volume being sufficient to cover said cutting surface 7a.
  • the holes 47 are dimensioned so that the fungicidal liquid is unable to leak out via the holes 47, or is unable to leak readily via said holes, as other parts of the spruce trunk, or the trunks of other trees, are cut during the times involved by the cutting cycles.

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  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Biodiversity & Conservation Biology (AREA)
  • Ecology (AREA)
  • Environmental Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Agricultural Chemicals And Associated Chemicals (AREA)
  • Catching Or Destruction (AREA)

Abstract

La présente invention concerne un dispositif de guide de scie à chaîne (4) conçu pour une chaîne coupante continue, qui est composé d'une barre guide ou d'une plaque guide (40) munie de rainures (42,43) proches du bord adaptées à la chaîne coupante et de surfaces latérales planes mutuellement opposées (44,44a), l'une (44) des surfaces, proximale par rapport à la souche, comportant une rainure ou une cavité (45) destinée à recevoir un dispositif perforé (46) à travers lequel s'écoule un liquide fongicide (50) formant une couche sur la surface coupée de la souche obtenue lors du cycle de coupe d'une opération de coupe. Le dispositif perforé est constitué d'une bande et la rainure ou la cavité (45) comprend des surfaces de support proches du bord (45a, 45b) aptes à co-agir avec les parties proches du bord de la bande précitée.
PCT/SE2001/000902 2000-05-15 2001-04-26 Dispositif de lame de scie pour lutte antifongique WO2001087050A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001252821A AU2001252821A1 (en) 2000-05-15 2001-04-26 A sawweb arrangement for fungus-control

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0001773-1 2000-05-15
SE0001773A SE515326C2 (sv) 2000-05-15 2000-05-15 Sågsvärdsarrangemang för svampbekämpning

Publications (1)

Publication Number Publication Date
WO2001087050A1 true WO2001087050A1 (fr) 2001-11-22

Family

ID=20279659

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2001/000902 WO2001087050A1 (fr) 2000-05-15 2001-04-26 Dispositif de lame de scie pour lutte antifongique

Country Status (3)

Country Link
AU (1) AU2001252821A1 (fr)
SE (1) SE515326C2 (fr)
WO (1) WO2001087050A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262289A1 (fr) * 2001-05-30 2002-12-04 Blount, Inc. Barre de guidage pour scie à chaíne incluant un liquide de traítement pour souche
EP4385692A1 (fr) 2022-12-15 2024-06-19 Iggesund Forest AB Barre de guidage pour chaîne de scie

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035058A (en) * 1990-07-09 1991-07-30 Suehiro Seiko Kabushiki Kaisha Chain saw guide bar
JPH0687101A (ja) * 1992-11-13 1994-03-29 Dia Top Kk チェーンソーの潤滑剤供給構造
SE504909C2 (sv) * 1992-11-12 1997-05-26 Lauri Kalervo Ketonen Färgmärkningsanordning i flerprocessmaskinens sågsvärd

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5035058A (en) * 1990-07-09 1991-07-30 Suehiro Seiko Kabushiki Kaisha Chain saw guide bar
SE504909C2 (sv) * 1992-11-12 1997-05-26 Lauri Kalervo Ketonen Färgmärkningsanordning i flerprocessmaskinens sågsvärd
JPH0687101A (ja) * 1992-11-13 1994-03-29 Dia Top Kk チェーンソーの潤滑剤供給構造

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1262289A1 (fr) * 2001-05-30 2002-12-04 Blount, Inc. Barre de guidage pour scie à chaíne incluant un liquide de traítement pour souche
EP4385692A1 (fr) 2022-12-15 2024-06-19 Iggesund Forest AB Barre de guidage pour chaîne de scie
WO2024125864A1 (fr) 2022-12-15 2024-06-20 Iggesund Forest Ab Barre de guidage de chaîne coupante

Also Published As

Publication number Publication date
SE0001773L (sv) 2001-07-16
SE0001773D0 (sv) 2000-05-15
SE515326C2 (sv) 2001-07-16
AU2001252821A1 (en) 2001-11-26

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