• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:

    公开号:SE1000064A1
    申请号:SE1000064
    申请日:2010-01-23
    公开日:2011-07-24
    发明作者:Sverre Aronsson
    申请人:Sverre Aronsson；
    IPC主号:
    专利说明:

    Another way of counteracting cutting cracks is to reduce the falling angle of the cut log by the driver lowering the crane and the unit during the final stage of the cutting. The method requires great skill on the part of the driver and can hardly be recommended for general use. The lowering must start at the right moment, take place at a suitable speed and last long enough to have the intended effect. If the lowering is started too early, the space in height can become too scarce for coarse logs. If the lowering is too fast, the saw value can be pinched. If the lowering is terminated prematurely, it will inevitably lead to cutting cracks even on small logs. Systems for automatic crane lowering have, for example, been developed by the forest machine manufacturer Ponsse. The system with crane lowering has the disadvantage of the cab changing position during the crane lowering. This has meant that some drivers disconnect from the system, whereby the intended effect is not achieved.
    It is also already known that the proportion of cutting cracks depends on the cutting speed.
    The proportion of cutting cracks decreases with higher cutting speeds. Furthermore, it is already generally known and obvious that the proportion of cutting cracks decreases if the saw chain used is sharp.
    In connection with felling trees with harvester heads, there are also other problems. In order for the saw value not to risk being wedged at the moment of felling of the tree trunk standing at the root, the driver must usually apply a force to the tree trunk. The procedure creates a bending moment at the cutting section, which increases the risk of cutting cracks. Furthermore, the risk that because the bar itches during felling means that the possible maximum cutting speed for the saw chain is limited.
    Sawing from the underside of the log in connection with the fitting entails problems.
    The problems mainly consist of the sword risking being wedged. The wedging of the saw value entails an increased risk of accidents, for example in the form of chain shots and the like.
    Prior art A method for cutting free-hanging horizontal objects of fissile material such as pruned tree trunks is already known via patent specification SE45 03 56. The method is intended to reduce crack formation in connection with the cutting section. In the method, the cutting takes place by means of an endless circulating controlled saw chain whose upper cutting part is moved from below upwards through the tree trunk. In construction, the present problem is solved by inserting only one part of the saw chain into the wood during cutting. During cutting, the lower edge portions are affected by the bending moment of the free-hanging object to support each other. At the end of the cutting, the unsawded portion of the tree trunk is exposed only to short-term tensile stress and substantially not to bending stresses. The construction differs from the present invention to a large extent in that it does not comprise a subsequent spacer. The cutting does not take place with a harvester unit of the single-lever unit type.
    The construction further does not include a spacer in accordance with the present patent application. Furthermore, the construction according to the patent specification cannot be used to fell vertically standing tree trunks at the root. The construction can hardly be integrated into an existing harvester head.
    One-handle type harvester heads are already known in a large number of variants and embodiments. For example, this type of harvester head is described in the Swedish patents SE530133, SE531644 with several patents. None of these, however, comprise a spacer following a successive chain which is intended to reduce the occurrence of cutting cracks.
    Detailed Description of the Invention The invention will be described in more detail in the following with reference to the accompanying schematic drawings which, by way of example, show the presently preferred embodiment of the invention.
    Figure 1 shows schematically in perspective a harvester assembly with a spacer in accordance with an embodiment of the present invention.
    Figure 2 schematically shows a harvester assembly with a spacer in accordance with an embodiment in accordance with a second exemplary embodiment of the present invention.
    Figures 3 - 7 show cutting with an assembly provided with a spacer in accordance with the present invention.
    Figure 8 schematically shows an exemplary form of the subsequent member.
    With reference to the figures and more specifically to Figures 1 to 3, a harvester unit 1 is schematically shown intended for use in felling, pruning and cutting of tree trunks 2.
    In alternative embodiments, it is conceivable that the harvester head is only intended for use in felling or cutting or a combination of felling and cutting. The harvester assembly 1 is preferably suspended, or otherwise suitably connected, via at least one rotator 3 and at least one mounting member 4, for example to (i) the end (tip) 5 of a crane arm in a Forestry Machine (not shown in the fi gures). Alternatively, the harvester assembly 1 may be connected to and operated by another vehicle or device suitable for the purpose.
    The harvester assembly 1 consists in its basic construction of any previously known variant of harvester assembly 1 of the single-grip type, which is provided with at least one spacer in accordance with the present invention.
    The exemplary embodiment of the harvester assembly 1 shown in the figures consists only of a conceivable construction of the harvester assembly which is possible within the scope of protection of the present invention.
    In the exemplary embodiment of the harvester unit 1, this comprises a body 6 which is pivotally arranged in relation to at least one tipping arm via at least one joint 7. The tipping arm 8 is connected via the rotator 3 to the mounting member 2 which in turn is connected to the crane arm 5.
    With the rotator 3, the tipping arm (and the entire harvester assembly) can be rotated about an axis vertical in the figure from the crown tip through the rotator. Through the joint 7, the body 6 can be maneuvered (rotated) about an axis which is substantially horizontal in the shape. The trunk can be operated between a substantially vertical position when felling the tree to a substantially horizontal position when pruning and cutting (fitting) the felled tree trunk.
    The frame 6 is provided with at least one gripping device 9 with which the tree trunk can be gripped.
    In the exemplary embodiment, the gripping device 9 comprises a first gripping member 10, a second gripping member 11, a third gripping member 12 and a fourth gripping member 13. The gripping means 10-13 are preferably constituted by gripping claws or similar construction suitable for the purpose.
    According to the prior art, the gripping members are rotatably arranged and are preferably operated with at least one operating member which in the exemplary embodiment constitutes a hydraulic cylinder. In alternative embodiments, the gripping claws can be actuated by another technique suitable for the purpose, such as some type of electrically driven actuator.
    The assembly further comprises at least one pruning member 14. The pruning means 14 preferably comprises at least one twig knife, twig blade or the like. The twig knives are preferably integrated with one or two of the gripping claws 10, 11, 12 and 13. One or two of the twig knives can also be placed in another suitable place in the body 6 or in another suitable place in the unit.
    The assembly 1 further comprises at least one feeding device 15. The feeding device 15 in the exemplary embodiment comprises a first feeding means 16 and preferably at least a first feeding means 16 and a second feeding means 17. The feeding means in the grooves consist of a feeding rollers (feed rollers) of a previously known type. this is not described in more detail in this patent application. The first feed roller and the second feed roller are pivotable (rotatable) arranged relative to the body. The respective feed means are driven by a drive unit suitable for the purpose. The drive unit is preferably hydraulically driven. It is conceivable that the drive unit in alternative embodiments consists of an electric drive unit or another type of drive unit suitable for the purpose.
    The exemplary harvester assembly further comprises at least one cutting unit (saw) 18 which is preferably located at the bottom of the harvester assembly. The cutting unit 18 preferably comprises a chain saw 19 with a saw bar 20 and a saw chain 21 mounted in a so-called saw box. The guard does not show a protective plate in the saw box that normally covers the saw value when the saw value is turned in the saw box. The saw blade 20 is rotatably (pivotably) pivotally arranged relative to a pivot axis 22 (center of rotation, center of rotation) in the essential axial direction of the harvester assembly 1. The saw value with associated saw chain is operated in accordance with prior art, which is why this technique is not described in more detail in this patent application. The positioning of the saw blade 20, rotation about the pivot axis, and the drive of the saw chain 21 are preferably hydraulic. In alternative embodiments, it is conceivable that these functions may be operated in another way suitable for the purpose, such as electrically or with another drive suitable for the purpose.
    The unique thing about the present invention is that the harvester assembly 1 comprises at least one spacer 23 following the saw value 20 which reduces the risk, or prevents the saw value from being clamped in the saw groove during sawing. The spacer 23 is operable back and forth in the transverse direction to the axial direction of the harvester assembly (as well as the tree trunk). The movement can take place by turning the spacer 23 towards the tree trunk in a manner corresponding to the saw value. In alternative embodiments, the displacement can take place by the spacer 23 being displaced in a substantially radial direction relative to the axial center of the harvester assembly (as well as the tree trunk). It is further conceivable that the subsequent spacer 23 when rotated towards the saw groove is rotated angularly relative to the axial center of the harvester unit and the tree trunk. In alternative embodiments, the movement of the spacer in the direction of the axial center of the harvester assembly can take place in another manner suitable for the purpose, such as a rotating movement, for example by an angular change around the axial center of the tree trunk.
    In the preferred embodiment, the spacer 23 is rotatably disposed into and away from the axial center of the harvester assembly and tree trunk. In the preferred embodiment, the spacer 23 is rotatably arranged about a pivot axis (axis of rotation, axis of rotation) 24.
    The pivot axis (rotation axis) 22 of the spacer is preferably parallel to the axis of rotation (axis of rotation) of the saw blade. 24 coincide or substantially coincide. In alternative embodiments of the present invention, it is conceivable that the pivot axis 22 of the saw blade and the pivot axis 24 of the spacer are spaced apart and thereby do not coincide. The spacer 23 is preferably connected to the pivot shaft 24 via a coupling member 25 or the like. The coupling means 25 preferably consists of, or comprises, at least one slip coupling or similar construction which at a certain force (rotating torque) allows the spacer 23 to rotate relative to the pivot axis (axis of rotation) 24. The actuation of the spacer 23 preferably takes place hydraulically. In alternative embodiments, it is conceivable for the operation to take place electrically or with another drive suitable for the purpose.
    Figures 3 to 7 schematically show cutting with an assembly in accordance with the present invention. The cutting preferably takes place immediately after the tree has been felled. When cutting for fl, the stem 2 is moved during pruning in the axial direction of the harvester head (essentially horizontal direction). When a certain length of the stem 2 is pruned, the cutting of the free-hanging part of the stem 26 from the non-free-hanging part of the stem 27 begins. the saw blade 20 into the tree trunk 2 substantially from the underside. In the second exemplary embodiment of the harvester assembly according to Figure 2, the subsequent spacer will be inserted from the side of the tree trunk. This differs from the traditional cutting with known harvester heads where the saw blade is essentially inserted into the tree trunk from the top. Figure 3 shows the unit at the beginning of the cutting of the tree trunk positioned to the position where it is to be cut. In Figure 4, the cutting has been started by turning the saw blade around the pivot axis of the saw blade (center of rotation). towards the tree trunk and started sawing a cut in the tree trunk. The cutting then takes place by a continued rotating movement of the saw blade. When cutting, the saw chain saws a substantially straight groove in the log which preferably extends in the substantially transverse direction of the tree trunk. In Figure 4, the subsequent spacer has not yet been inserted into the cutting groove.
    Figures 5 and 6 show the sword during different stages of sawing through the tree trunk. The subsequent spacer 23 is partially first into the cutting groove. By inserting the subsequent spacer into the cutting groove, the technical effect is achieved that the bending moment on the wood (in the uncut part of the cross section) at the cutting section, from the hanging part of the tree trunk, is reduced. The bending moment essentially turns into tensile stress in the remaining, not sawn-through, part of the tree trunk cross-section.
    The shape of the spacer can vary widely within the scope of the present invention. In the preferred embodiment of the present invention shown in Figure 8, the spacer has an L-shaped cross-section. The spacer 23 with the L-shaped cross-section comprises a first part 28 and a second part 29. The first part 28 is intended to be completely or partially inserted into the cutting groove. The second part 28 is intended to constitute a stop and will, when using the spacer 23, rest against the outside of the tree trunk. In alternative embodiments, it is conceivable that the cross-section of the spacer 23 has another shape suitable for the purpose. This can, for example, be wedge-shaped or of another shape suitable for the purpose.
    The movement of the subsequent spacer 23, seen in the axial directions of the harvester assembly 1 and the tree trunk, can vary widely within the scope of the present invention. For example, the spacer may be of a substantially straight shape as shown in the figures. Alternatively, the subsequent spacer may be curved, arcuate or of another shape suitable for the purpose after all or part, or parts of its length.
    In the detailed description of the present invention, construction details which may be obvious to a person skilled in the art may have been omitted. Such obvious construction details are included to the extent required for a proper function of the present invention to be achieved. For example, components such as hydraulic hoses, couplings with several types of components are included to the extent required to achieve a full function in the harvester head. Although certain preferred embodiments have been described in detail, variations and modifications within the scope of the invention may be apparent to those skilled in the art to which the invention pertains, and all of these are considered to fall within the scope of the appended claims. For example, it is conceivable that the present invention consists of an additive to a non-hazardous harvester head. This is provided that the unit allows this.
    It is conceivable that the harvester assembly has a construction suitable for the purpose other than that shown in the illustrative figures in this patent specification. The harvester assembly can also consist of a variant of harvester assembly developed in the future, which is provided with a spacer member in accordance with the inventive idea in this patent application.
    It is further conceivable that a spacer in accordance with the present invention is used in a two-grip assembly. Furthermore, it is conceivable that the present spacer is used with a manually operated chainsaw.
    Where the harvester head so permits, the present invention may be an additive to the non-abrasive harvester head.
    Advantages of the invention With the present harvester assembly and the procedure for using the harvester assembly, the risk of cutting cracks occurring during cutting will be significantly reduced.
    With a harvester assembly provided with a spacer in accordance with the present invention, the risk of the saw blade being jammed between the saw groove will be minimized.
    权利要求:
    Claims (8)
    [1]
    Harvesting unit (1) for felling and cutting elongated tree trunks (2) comprising at least one frame (6) provided with at least one gripping device (9) and at least one feeding device (15) and at least one saw (18) whose saw blade (20) is rotatably arranged about a first pivot axis (21), characterized in that the harvester assembly (1) comprises at least one spacer (23) following the saw value (20) which is moved by a reciprocating movement relative to the axial center of the harvester assembly (and the cut tree trunk)
    [2]
    Harvester assembly (1) according to claim 1, characterized in that the spacer means is rotatably (pivotally) arranged in radial direction relative to the axial direction of the harvester assembly (in sawing substantially the saw value follows movement).
    [3]
    Harvester assembly (1) according to claim 2, characterized in that the center of rotation of the subsequent member and the center of rotation of the saw blade coincide or substantially coincide.
    [4]
    Harvester assembly (1) according to at least one of the preceding claims, characterized in that the cross section of the subsequent spacer is L-shaped.
    [5]
    Harvester assembly (1) according to at least one of the preceding claims, characterized in that the spacer is spring-loaded.
    [6]
    Harvester assembly (1) according to at least one of the preceding claims, characterized in that the spacer is connected to the assembly via at least one slip coupling.
    [7]
    Harvester assembly (1) according to at least one of the preceding claims, characterized in that the saw box (saw box) is rotatably arranged relative to the axial center of the harvester assembly.
    [8]
    Method for felling and cutting substantially elongate objects such as tree trunks with aggregate according to claims 1 to 7, characterized in that the aggregate is moved towards the tree trunk and grips it, after which the rooted tree trunk is separated from the root, after which the tree trunk changes position to a substantially horizontal direction where the trunk during pruning for fl is moved in a horizontal direction in relation to the unit to a protruding length where cutting of the tree trunk takes place by inserting the saw blade into the tree trunk and that at least one subsequent member is fully or partially inserted into the cut section after the saw blade and prevents the saw blade. the saw track.
    类似技术:
    公开号 | 公开日 | 专利标题
    US3981336A|1976-09-21|Tree harvester
    WO2001084910A1|2001-11-15|Method and arrangement for adjusting feed rate of a crosscut saw
    JPH084432B2|1996-01-24|Jib-mounted suspension for timber harvesters
    SE1000064A1|2011-07-24|Device and method for felling and cutting tree trunks
    KR100972741B1|2010-07-27|Rotary pruning shears for an excator
    SE443905B|1986-03-17|DEVICE IN THE FELL AND GRIPAGGGATT
    FI67288C|1985-03-11|GRIPSKOERDARE
    JP2015223086A|2015-12-14|Continuous logging apparatus for timber, and continuous gripping apparatus
    CA2746102C|2017-01-24|Harvester head
    WO2000065900A1|2000-11-09|Harvester head and a method therein
    AU2006325604B2|2012-11-08|A blade
    US20170066155A1|2017-03-09|Cutting device and a method of cutting with a cutting device
    CA1130174A|1982-08-24|Tree-felling apparatus
    WO2010103189A2|2010-09-16|Harvester head and method in a harvester head
    EP2804468A1|2014-11-26|Cutting arrangement for gripping and cutting trees or bushes
    SE517665C2|2002-07-02|Aggregate for cutting a tree trunk
    CA2190337C|2003-06-10|Grab harvester
    CA2590788A1|2008-12-07|Suspendable tree cutter having an adjustable orientation pivot
    WO2017193215A1|2017-11-16|Improvements in tree processing systems
    EP3138673B1|2022-01-19|A tree-handling device, a multi-process machine, a method for arranging the cutting operation of a tree-handling device
    FI126453B|2016-12-15|Woodworking device and method for arranging the cutting function of a woodworking device
    RU2529159C1|2014-09-27|Claw-like felling unit for tree harvesting machine
    JP2019528199A|2019-10-10|Saw chain for cutting device of tree cutting processing device, tree cutting processing device, saw chain blank, and cutting operation method of tree cutting processing device
    RU2043707C1|1995-09-20|Felling device
    FI12196U1|2018-10-15|Firewood processor machine
    同族专利:
    公开号 | 公开日
    EP2542046A1|2013-01-09|
    WO2011090419A1|2011-07-28|
    SE535915C2|2013-02-19|
    EP2542046A4|2015-05-20|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3636996A|1969-12-12|1972-01-25|Donald D Lanz|Chain saw antipinch guard arm|
    SE409431B|1978-04-17|1979-08-20|Ostbergs Fabriks Ab|DEVICE FOR CUTTING FELLED TREES|
    SE450356B|1982-06-21|1987-06-22|Osa Ab|SET FOR CUTTING OF HANGING SIGNIFICANT HORIZONTAL ITEMS SUCH AS STOCKS AND SIMILAR, AND DEVICE FOR EXECUTING THE SET|
    CA1214710A|1984-03-06|1986-12-02|Olavi Kuusilinna|Tree harvesting device|
    US5074047A|1990-09-10|1991-12-24|Tuscarora Designs, Inc.|Anti-pinch device for chain saw|
    FI113002B|1998-06-04|2004-02-27|Ponsse Oyj|Method and device for controlling the crane|
    FI116267B|2000-12-05|2005-10-31|Timberjack Oy|Control procedure and control device in a harvester|ITBZ20110060A1|2011-12-07|2013-06-08|Gurndin Ohg Des Gurndin Helmut & Co|HEAD OF BLAST CHILLING|
    CN111421618B|2020-03-31|2021-11-19|湖州瑞讯机电设备有限公司|Wood pile branch removing device|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1000064A|SE535915C2|2010-01-23|2010-01-23|Device and method for felling and cutting tree trunks|SE1000064A| SE535915C2|2010-01-23|2010-01-23|Device and method for felling and cutting tree trunks|
    PCT/SE2011/000010| WO2011090419A1|2010-01-23|2011-01-22|Device and method for felling and cutting tree trunks|
    EP20110734932| EP2542046A4|2010-01-23|2011-01-22|Device and method for felling and cutting tree trunks|
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