Abstract:
Method and device for the determination of a thickness of a cross-section (S) of a tree trunk (30) received in a harvesting assembly (10) comprising a pair of opposite feed wheels (14) engaging with the tree trunk and a delimbing knife (18) abutting against the tree trunk. The mutual position of the feed wheels is detected as a measure of a transverse dimension (D1) of the cross-section of the tree trunk. The position of the delimbing knife (18) in relation to an abutment surface (22) of the tree trunk opposite thereto is detected as a measure of an additional transverse dimension (D2) of the cross-section (S) of the tree trunk, which additional transverse dimension forms an essentially right angle with the first-mentioned transverse dimension. The thickness of the cross-section (S) of the tree trunk is calculated based on the two measures of the transverse dimensions (D1, D2).
Abstract:
Unite d'elagage pour tronconneuse comprenant une scie articulee (3, 4) et un guide de scie articule (2) pouvant etre fixe sur le boitier (1) d'une tronconneuse. Le dispositif de guidage de la scie articulee s'avance depuis le boitier de la tronconneuse et comprend une section a nez plie (22', 23', 24) qui guide la scie articulee sur un chemin sensiblement semi-circulaire sur un plan transversal par rapport a la direction d'avancement, les dents de la scie etant orientees sensiblement vers l'avant. Pendant l'operation d'elagage la forme semi-circulaire de la section de nez est maintenue contre la peripherie ronde du tronc et deplacee vers l'avant le long de celui-ci. L'unite d'elagage facilite et accelere considerablement le demembrement, tout en reduisant les dangers d'accident et permettant une position de travail nettement amelioree.
Abstract:
A multi-axis controlled self-climbing tree trimmer used for shaping and severing peripheral growth from a tree is provided herein. The trimmer typically includes a structural segment hinged together to form a rigid chassis that surrounds a tree trunk climbing segment and a trimming portion. The climbing portion is retained within the structural segment in the form of a number of inward-extending carriages containing one or more rollers for gripping the tree trunk during climbing, and the trimming portion may include a rotatable split ring gear containing centrifugally rotating trimming blade members and/or a cutting tool on a positionable arm. When rotated, the blade members unlatch and pivot, into the trunk of the tree to effect controlled trimming. The system may utilize a multi-axis control system that uses linear interpolation, circular interpolation and coordination of all axes to enable the trimmer to follow an XYZ contour selected by a user.
Abstract:
Method and device for the determination of a thickness of a crosssection (S) of a tree trunk (30) received in a harvesting assembly (10) comprising a pair of opposite feed wheels (14) engaging with the tree trunk and a delimbing knife (18) abutting against the tree trunk. The mutual position of the feed wheels is detected as a measure of a transverse dimension (D1) of the cross-section of the tree trunk. The position of the delimbing knife (18) in relation to an abutment surface (22) of the tree trunk opposite thereto is detected as a measure of an additional transverse dimension (D2) of the cross-section (S) of the tree trunk, which additional transverse dimension forms an essentially right angle with the first-mentioned transverse dimension. The thickness of the cross-section (S) of the tree trunk is calculated based on the two measures of the transverse dimensions (D1, D2).
Abstract:
A multi-axis controlled self-climbing tree trimmer used for shaping and severing peripheral growth from a tree is provided herein. The trimmer typically includes a structural segment hinged together to form a rigid chassis that surrounds a tree trunk climbing segment and a trimming portion. The climbing portion is retained within the structural segment in the form of a number of inward-extending carriages containing one or more rollers for gripping the tree trunk during climbing, and the trimming portion may include a rotatable split ring gear containing centrifugally rotating trimming blade members and/or a cutting tool on a positionable arm. When rotated, the blade members unlatch and pivot, into the trunk of the tree to effect controlled trimming. The system may utilize a multi-axis control system that uses linear interpolation, circular interpolation and coordination of all axes to enable the trimmer to follow an XYZ contour selected by a user.
Abstract:
A portable power cutting apparatus has a control unit with a support for mounting the control unit on one arm of the user permitting the control unit and cutting tool to be supported by that arm. The support is pivotal and a flexible cable operatively connects a motor to the cutting tool for driving the tool. This permits the control unit to be pivoted in a lateral direction or twisted to allow the operator to move the cutting head in a variety of positions without loss of power by moving only the supporting arm and hand of the user. A handle is provided on the control unit for gripping by the hand of the user's support arm. A cutting tool suitable for girdling a tree and which can also be used to cut through tree branches and small tree trunks is also disclosed. This cutting tool is frustoconical in shape having a length of chainsaw chain wrapped in a spinal groove around the outside face of this tool body. In another embodiment the cutting tool is a chainsaw which can be operated with the supporting arm of the user.