WO2005020670A1 - Dispositif d'appui utilise dans les operations forestieres - Google Patents

Dispositif d'appui utilise dans les operations forestieres Download PDF

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Publication number
WO2005020670A1
WO2005020670A1 PCT/NZ2004/000206 NZ2004000206W WO2005020670A1 WO 2005020670 A1 WO2005020670 A1 WO 2005020670A1 NZ 2004000206 W NZ2004000206 W NZ 2004000206W WO 2005020670 A1 WO2005020670 A1 WO 2005020670A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
base member
support means
lifting equipment
support
Prior art date
Application number
PCT/NZ2004/000206
Other languages
English (en)
Inventor
Donald Anthony Scott
Original Assignee
Awdon Technologies Limited
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 Awdon Technologies Limited filed Critical Awdon Technologies Limited
Publication of WO2005020670A1 publication Critical patent/WO2005020670A1/fr

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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
    • A01G23/003—Collecting felled trees
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/42—Gripping members engaging only the external or internal surfaces of the articles
    • B66C1/58—Gripping members engaging only the external or internal surfaces of the articles and deforming the articles, e.g. by using gripping members such as tongs or grapples
    • B66C1/585—Log grapples

Definitions

  • This invention relates to the provision of a support means and a method of using same.
  • the support means provided may be used in forestry applications to support or otherwise assist in the management or handling of trimmed fallen trees or stems.
  • Reference throughout this specification will also be made to the present invention being used as an additional component of or an element added to an excavator. However, those skilled in the art should appreciate that other configurations of the present invention are also envisioned.
  • the scanning and subsequent cutting of stems into logs can be completed using permanent processing plants which move stems along a conveyer system.
  • Stems can be scanned by various different systems well known in the art and also preferably inspected by skilled operators who can identify faults or problems in a stem which cannot necessarily be detected by automated or mechanical systems.
  • the scanned stem then progresses along a conveyer line to be subsequently cut into a number of logs which are in turn sorted by size, length or other related characteristics.
  • the mature trees to be felled and trimmed into stems can be located in remote or inaccessible regions. It can be difficult and costly to transport whole stems to permanent processing plants from such locations. In such instances it is preferable to provide portable processing equipment which can also perform the same function.
  • Excavators can have a number of different types of working heads attached to the free end of the working arm where these heads be driven by pressurised hydraulic fluid supplied from the excavator.
  • Many different other types of purpose built forestry machines (not necessarily being excavators) have been developed to work in this field. These custom built machines can be tracked or wheeled and can also include a working arm attached to a rotating frame and a body.
  • machines and in particular excavator working heads adapted to perform cutting or bucking operations have difficulty sorting, stacking or fleeting the logs produced effectively. This is especially true in specialised machinery which can be adapted to fell, de-limb and cut to length stems but which has difficulty lifting and sorting the resulted logs produced.
  • a support means which could be used to assist in such applications.
  • a support means which could allow portable forestry fleeting equipment to both lift, support and cut a stem in a single operation while still maintaining a stable grip on the stem would be of advantage.
  • Felled trees trimmed into stems also need to be moved to processing areas or loaded onto transportation trucks when stems are not to be processed into logs on site in the forest.
  • the need to move stems can cause problems when relatively long or tall stems are involved.
  • Normally excavators with customised working heads are used to grasp and lift stems at one point about their centre of mass, with the excavator then moving to the new location for the stem.
  • Live heel systems provide a bar extending from the end of the excavator's working arm where this bar provides two attachment points at its opposite ends to a stem. This stabilises the excavator's grip on the stem, but requires a single piece of relatively costly customised equipment to be purchased and used in forestry operations.
  • a dead heel arrangement can be used which employs a projecting stake extending from the base of the excavator's working arm.
  • the excavator can grasp a section of a stem extending towards one end of same while pivoting the opposite end of the stem into position underneath the dead heel stake. This then provides the stem with two points for connection or attachment and can stabilise the grip of the excavator.
  • a support means adapted to be used in association with lifting equipment, said lifting equipment including a main body, a working arm extending from the main body and being moveable with respect to the main body, and a working head attached to the free end of the working arm, said working head being adapted to be connected to and process a shaft,
  • support means includes,
  • a base member attached to the main body of the lifting equipment, said base member being adapted to define a support surface
  • a retention member connected to and extending out from the base member
  • the base member is adapted to support the weight of a section of a shaft lifted by the lifting equipment
  • the retention member is adapted to retain the section of the shaft supported on the base member
  • a method of processing a shaft using a support member associated with lifting equipment characterised by the steps of:
  • lifting equipment which includes:
  • a working arm extending from the main body and moveable with respect to the main body
  • a working head attached to the free end of the working arm, said working head being adapted to be connected to and process a shaft
  • a support means which includes, a base member attached to the main body of the lifting equipment, said base member being adapted to provide or define a support surface, and a retention member connected to and extending out from the base member, said retention member being angled with respect to the base member,
  • the base member is adapted to support the weight of a section of a shaft lifted by the lifting equipment, and the retention member is adapted to retain the section of the shaft supported on the base member.
  • the present invention is adapted to provide a support means preferably used in the management or handling of shafts by lifting equipment.
  • a shaft to be support in conjunction with the present invention may be any type of element or member which has a length substantially greater than its width or diameter.
  • Reference throughout this specification will also be made to the shaft supported in conjunction with the present invention being tree stems. However, those skilled in the art should appreciate that other types of shafts may necessarily be supported or manipulated in conjunction with the present invention and reference to stems only throughout the specification should in no way be seen as limiting.
  • the support means provided may be adapted to be used in combination or association with lifting equipment.
  • the lifting equipment may provide the motive power and working elements used to grasp, lift or otherwise manipulate a stem, whereas the support means may be used in an assisting or support role as required.
  • the lifting equipment employed consists of a main body and working arm extending from the main body which is moveable with respect to the main body.
  • a working head is preferably connected to the free end of the working arm where this working head is used to grasp, connect to or otherwise facilitate the lifting of a stem using the working arm.
  • the main body of the lifting equipment may be formed from or incorporated a base with a rotating body connected to such a base. The rotating body may then slew or rotate with respect to the base if required.
  • the working head of the lifting equipment may be adapted to both grasp or connect to a section of a stem in addition to being adapted to cut through the stem adjacent to the section grasped or connected to.
  • This allows the working head and associated lifting equipment to be used in forestry fleeting applications to both manipulate and cut a stem into a plurality of logs.
  • Reference throughout this specification will also be made to the lifting equipment with which the present invention is to be used or associated being an excavator. Excavators are well known as efficient types of lifting equipment which normally are equipped with track based drive systems capable of moving the excavator over rough or boggy terrain.
  • Reference throughout this specification will also be made to the support means provided being connected to the main body of an excavator. However, those skilled in the art should appreciate that other types of lifting equipment and other configurations of the support means may also be implemented in accordance with alternative embodiments of the present invention.
  • the support means includes a base member which is adapted to be attached to the main body of the excavator involved.
  • the base member may be attached to a side of the excavator main body and preferably project out at an angle of approximately 90° to the excavator main body.
  • the base member may define a support surface which can be used to support or otherwise bear the weight of a section of a stem located or positioned on same.
  • the base member's connection to the main body can therefore be used to transfer the weight supported onto the excavator.
  • the support means also includes a retention member connected to the base member.
  • This retention member may extend out from the base member and preferably be angled with respect to the base member.
  • the retention member may be angled upwards with respect to the base member. This angle provided in the retention member may bend the projecting free end of the support means up towards the uppermost portions of the main body of an excavator and thereby define a frame with these base member and exterior surface of the main body within which a section of a stem is to be retained.
  • both the base member and retention member may be formed from relatively straight beams with substantially rectangular cross sections. This will provide a flat level support surface from the base member and a flat angled retention surface for the retention member.
  • both the base member and retention member may be formed through a single curve element if required which can extend out from the body of an excavator and then provide or define a single progressive support surface and retention surface.
  • This configuration of /the support means allows it to support a section of a stem which is lifted by the excavator.
  • a section or end of the stem may be supported on the base member and retained between the retention member and exterior surface of the excavator's main body, while at the opposite end of the stem the working head may be used to grasp and in combination with the working arm, lift the opposite end of the stem from the ground.
  • the excavator may also move to a new location again without needing to drag the stem along the ground.
  • the stem when an additional processing element or component is provided in the working head to cut through a stem, the stem may be bucked and fleeted into a number of different length or sized logs in a single operation.
  • the lifted and supported stem may be cut at its connection position to the working head, with the working head then subsequently being used to draw or move the stem forward and then to grasp a new additional section of the stem at which a second or further cut is to be made. Cuts may be made in the stem when the end of the stem projecting away from the working head will fall onto a pile or bin of logs sorted into the same length or size.
  • the excavator may then move the working head adjacent to each appropriate bin prior to a cut being made, with the cut logs simply falling from the end of the working head into the correct bin or pile.
  • the base member may be adapted or configured to assist in the movement of a stem over its support surface.
  • the base member may include a series of rollers or a rotating surface as its support surface which will present a low friction face to any stem drawn across same.
  • the support surface may be formed with a substantially convex curved surface to present a minimum surface area for friction forces to act against a shaft drawn over same.
  • the support means may also be adapted to assist in the removal of branches from a recently felled stem.
  • a cutting face or edge may be provided in conjunction or combination with the support surface of the base member. Such a cutting edge can intercept projecting branches of a stem as the stem is drawn over the support surface to subsequently cut branches from the stem.
  • Such a cutting edge or blade may be provided in some embodiments through a separate component or fixture attached to the main body of an excavator adjacent to the support surface of a base member. Alternatively, in other instances this cutting blade may be integrated into the constructional or form of the support surface and base member itself. Those skilled in art should appreciate that a number of different implementations of a branch removing cutter or blade may be implemented in conjunction with the present invention.
  • a branch removing blade can allow the movement or passage of a stem over or along the support surface to be eased.
  • the bottom or rear branches of a stem may be removed as they are drawn over the region of in which the support surface is located.
  • the lifting equipment may also incorporate some form of protective shielding or enclosure.
  • a shield or enclosure may use to protect the operator of the lifting equipment from branches as a stem is drawn over the base member's support surface.
  • a securing means adapted to be used in association with lifting equipment
  • said lifting equipment including a main body, a working arm extending from the main body and moveable with respect to the main body, and a working head attached to the free end of the working arm, said working head being adapted to be connected to a shaft,
  • the securing means includes
  • a blocking member attached to the main body of the lifting equipment, said blocking member being adapted to provide or define a blocking surface
  • a trapping member connected to and extending out from the blocking member, said trapping member being angled with respect to the blocking member
  • the blocking member is adapted to block the movement of a section of a shaft lifted by the lifted equipment
  • the trapping member is adapted to trap the section of the shaft blocked in contact with the blocking member
  • a securing means substantially as described above provided in combination with a support means substantially as described above.
  • lifting equipment which includes both a support means substantially as described above and a securing means substantially as described above.
  • lifting equipment which includes
  • a working arm extending from the main body and moveable with respect to the main body
  • a working head attached to the free end of the working arm, said working head being adapted to be connected to a shaft, and
  • a securing means which includes a blocking member attached to the main body of the lifting equipment, said blocking member being adapted to provide or define a blocking surface, and a trapping member connected to and extending out from the blocking member, said trapping member being angled with respect to the blocking member,
  • the blocking member is adapted to block the movement of a section of a shaft lifted by the lifted equipment
  • the trapping member is adapted to trap the section of the shaft blocked in contact with the blocking member
  • references to stems, and excavators used as the lifting equipment in conjunction with such securing means should in no way be seen as limiting.
  • the applications considered for the securing means discussed need not require the working head of an excavator to be adapted to both grasp and cut a stem.
  • the securing means may be provided in conjunction or combination with the support means discussed previously.
  • the securing means may be provided in combination with the support means to increase the number of functions or operations the combined system may perform.
  • both the securing means and support means discussed throughout this specification may also be implemented or provided in isolation from one another if required.
  • a securing means may be employed to provide two points of connection or attachment for a lifted stem to an excavator.
  • the first point of contact may be provided through the working head of the excavator whereas the securing means may provide the second point of contact required.
  • the securing means provided includes a blocking member adapted to be attached to the main body of the excavator involved.
  • the blocking member may be attached to the side of the excavator main body and may project out from this body at an angle of approximately 90° to the end of the excavator working arm.
  • the blocking member may define a blocking surface which can be used to block, stop or otherwise locate a section of a lifted stem placed underneath the blocking member. Any turning force or torque applied by the stem through its connection to the excavator's working head at a point offset from the stem's centre of mass will therefore be balanced or negated by the blocking member.
  • the securing means also includes a trapping member connected to the blocking member.
  • This trapping member may extend out from the blocking member and preferably be angled with respect to the blocking member.
  • the trapping member may be angled downwards with respect to the blocking member.
  • the angle provided in the trapping member may bend the projecting free end of the securing means away from the outermost portions of the main body of the excavator, thereby providing a downward facing partial U-shaped frame within which a section of a stem may be inserted and trapped.
  • both the blocking member and trapping member may be formed through a single curve element if required which can extend out from the body of an excavator and then provide or define a single progressive blocking surface and trapping surface.
  • This configuration of the securing means allows it to block any upward pivoting motion of a stem which has been grasped by the excavator's working head at a point displaced from the centre of mass of the stem.
  • This offset connection position can in turn cause an upwardly directed torque or turning force to be applied to the distal end of the stem.
  • the securing means can be used to balance or negate this turning force by trapping the section of the stem against the blocking surface defined by the blocking member.
  • a securing means allows an excavator to use a stable two point connection to a stem when lifted. This allows the excavator's working head to grasp a section of a stem offsets from its centre of mass. The closer end of the stem to this grasped section may then be tucked underneath or into the securing means provided to in turn hoist or pivot the opposite end of the stem off the ground and to point same upwards. This in turn allows relatively long or tall stems to be lifted and transported by an excavator both safely and with a reduced risk of the stem breaking during transportation.
  • both the blocking member and trapping member may be formed from relatively straight beams with substantially rectangular cross sections. This will provide a flat, level, blocking surface from the blocking member and a flat angled trapping surface for the trapping member.
  • a support means as configured in accordance with the present invention may provide many potential advantages over the prior art, in that it can allow both fleeting to occur at the same time as bucking or cutting of a stem into length.
  • an excavator or other similar type of equipment may maintain a stationary position during fleeting and bucking operations, slewing or rotating its main body around to drop a cut log product into an appropriate bin or pile of products.
  • lifting equipment can be located in the centre of an array piles of sorted log products and may fleet and buck a lifted stem to each appropriate pile through simply slewing the main body of the equipment into the correct position or orientation with respect to a specific pile.
  • FIGS. 1a & 1b illustrate prior art support means used in conjunction with existing lifting equipment
  • Figures 2a & 2b illustrate a support means and a securing means configured in accordance with a preferred embodiment when used with a lifting excavator.
  • Figure 3 illustrates the use of securing means shown with respect to figures 2a and 2b.
  • Figure 4 shows a securing means similar to that discussed with respect to figure 2b which also includes a branch cutter blade.
  • Figures 1a & 1b illustrate prior art support means used in conjunction with existing lifting equipment.
  • Figure 1a illustrates a dead heel lifting system whereas figure 1b illustrates a live heel lifting system.
  • the stem lifted has provided two distinct connection points to the excavator's arm but at the cost of requiring a relatively large and customised working head to be used.
  • the dead heel system shown with respect to figure 1a requires the provision of a relatively small projection stake near the base of the excavator's working arm.
  • the operator of the excavator must be careful when the stem and excavator arm are moved to ensure that the near end of the stem stays under the dead heel stake.
  • the maximum height or length of stems to be lifted by a dead heel system is limited by the maximum distance which can be provided between the dead heel stake and the working head of the excavator arm.
  • FIGS 2a & 2b illustrate a support means and a securing means configured in accordance with a preferred embodiment of the present invention when used with a lifting excavator.
  • the support means (1 ) is employed to support a stem (2) lifted by the excavator (3).
  • the support means includes or consists of a support member (1a) extending out from the side or main body of the excavator (3), and a retention member (1b) which extends from the end of the support member (1a) and is angled upwards with respect to the support member (1a).
  • the excavator (3) also has attached a securing means (4).
  • the securing means consists of or includes a blocking member (4a) extending out from the main body of the excavator (3), and a trapping member (4b) which extends from the opposite end of the blocking member and is angled downwards with respect to the blocking member.
  • Figure 2a shows a front view of the support means (1) being used whereas figure 2b shows a side cross section view of the support means (1) when used.
  • the support means (1) allows the working head of the excavator to lift a stem near one end of same. The opposite end or section of the stem may then be supported by the support means (1) to lift the entire stem off the ground.
  • the support means (1 ) can be used in fleeting operations where the working head of the excavator is capable of both lifting, grasping and also cutting through the lifted section of stems. This is illustrated with respect to figure 2b where the end of the stem pointing away from the front of the excavator can be cut off the stem and allowed to drop into a sorted bin or pile of similar log products. The stem may then be slid forward over the support surface provided by the support means and the stem grasped at its opposite end by the excavator's working head at a new position at which a further cut is to be made.
  • Figure 3 illustrates the securing means shown with respect to figures 2a and 2b.
  • the securing means (4) is used to trap or secure one end of a stem when lifted by the excavator (3).
  • the securing means (4) blocks upwards pivoting motions of the end of the stem when the stem is grasped by the excavator's working head at a point offset from the centre of mass of the stem.
  • the securing means will then block the pivoting force involved and provide a second secure connection of the stem to the excavator.
  • the trapping member (4b) will retain the section of the stem involved in contact with the blocking surface defined or provided by the blocking member (4a). This allows the excavator to then move to a new location for the stem involved with a stable grasp on the stem.
  • Figure 4 shows a securing means similar to that discussed with respect to figure 2b which also includes a branch cutter blade.
  • a branch cutter blade may be attached to the main body of an excavator so that the blade will remove log branches of stem as the stem is drawn forward by the working head of the lifting equipment and over the support surface of the support means. This will therefore ease the passage of the stem forward over the support means during fleeting and bucking operations.

Abstract

Cette invention concerne un dispositif d'appui qui comprend un élément de base fixé au corps principal d'un équipement de levage, lequel élément de base est conçu pour définir une surface d'appui. Ce dispositif d'appui comprend également un élément de retenue relié à l'élément de base et s'étendant hors de celui-ci, lequel élément de retenue est incliné par rapport à l'élément de base. Ce dispositif d'appui est conçu pour être utilisé de façon que l'élément de base supporte le poids de la section de tige soulevée par l'équipement de levage tandis que l'élément de retenue est conçu pour retenir la section de la tige sur l'élément de base. Un dispositif d'arrimage peut également être utilisé conjointement à ce dispositif d'appui et entre aussi dans le domaine couvert par la présente invention.
PCT/NZ2004/000206 2003-09-02 2004-09-01 Dispositif d'appui utilise dans les operations forestieres WO2005020670A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NZ52800403 2003-09-02
NZ528004 2003-09-02

Publications (1)

Publication Number Publication Date
WO2005020670A1 true WO2005020670A1 (fr) 2005-03-10

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8235156B2 (en) 2007-05-26 2012-08-07 Micheal James Koss Retrofitable ROPS reinforcement structure for cab raiser interface

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3833034A (en) * 1973-03-19 1974-09-03 Deere & Co Tree harvester
US3905407A (en) * 1973-02-06 1975-09-16 Clark Equipment Co Tree harvester
US3960190A (en) * 1975-06-04 1976-06-01 Eaton Yale Ltd. Method and apparatus for harvesting sheared trees
SU793491A1 (ru) * 1979-07-13 1981-01-07 Научно-Производственное Объедине-Ние "Силава" Манипул тор лесозаготовительнойМАшиНы
US4416311A (en) * 1979-12-05 1983-11-22 Murdoch Logging Industries Pty. Ltd. Tree harvester
US5107912A (en) * 1990-11-14 1992-04-28 Cote Jean Marie Tree processing apparatus

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3905407A (en) * 1973-02-06 1975-09-16 Clark Equipment Co Tree harvester
US3833034A (en) * 1973-03-19 1974-09-03 Deere & Co Tree harvester
US3960190A (en) * 1975-06-04 1976-06-01 Eaton Yale Ltd. Method and apparatus for harvesting sheared trees
SU793491A1 (ru) * 1979-07-13 1981-01-07 Научно-Производственное Объедине-Ние "Силава" Манипул тор лесозаготовительнойМАшиНы
US4416311A (en) * 1979-12-05 1983-11-22 Murdoch Logging Industries Pty. Ltd. Tree harvester
US5107912A (en) * 1990-11-14 1992-04-28 Cote Jean Marie Tree processing apparatus

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8235156B2 (en) 2007-05-26 2012-08-07 Micheal James Koss Retrofitable ROPS reinforcement structure for cab raiser interface

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