SU1150068A1 - Lopping apparatus - Google Patents

Abstract

1. A CUTTING DEVICE FOR SUCHIEV, containing a base with tool holders and bolted curved knives for cutting branches with support surfaces and knives for partial removal of bark with cutting edges located below the level of the support surfaces for cutting blades for and under angle to the direction of movement of the tree, with the heads of the bolts located in the slots of the curved knives, having a corresponding shape, characterized in that, in order to simplify the device and increase efficiency, bolt-head connections of curved knives and tool holders in the zone of greatest curvature of the knives protrude beyond the bearing surface of the knives, while knives are located on the projecting part of the bolt heads to partially remove the bark. 2. The device according to claim 1, characterized in that the knives for partial removal of the cortex are made in the form of a body of rotation. 3. The device according to claim 1, characterized in that the knives for partial removal of the bark are made in the form of a polyhedron. SP O5 00

Description

The invention is intended for cutting branches from trees and can be used in the logging industry. A device for trimming knots with power cutting knives is known, which includes delimbing knives and additional wiping knives mounted on the pivoting levers in the plane of rotation of the respective side knives and kinematically connected with them by means of hinged bars 1. The disadvantage of this device is the design complexity, in addition to additional knives, the device also contains pivoting levers and hinges. Consequently, the reliability of the work as a whole decreases, and due to the occurrence of backlash at the hinge, the bark is cut through or additional blades are cut into the wood, which reduces the quality of the processing of trees. It is also known a device for pruning knots, comprising a base with tool holders and curved blades mounted by bolting together for trimming knots with bearing surfaces and knives for partially removing bark with cutting edges located below the bearing surfaces of knives for trimming branches and under angle to the direction of movement of the tree, with the heads of the bolts located in the slots of the curved knives, having the corresponding shape 2. The disadvantages of the known device are the complexity of making this knife design, since the cutting edge of the knives at the edges and in the middle part is made at different levels; in the event that it is not necessary to carry out a partial debarking of the trees being processed, it is necessary to replace all the knives of a device of this type, which is irrational; The design of knives of this type does not provide high-quality removal of bark, since their bearing pad is located behind the cutting edge of the central part, which is cut in the middle of the trees when processing trees. The purpose of the invention is to simplify the device and increase efficiency. This goal is achieved by the fact that in a device for pruning, containing a base with tool holders and curvilinearly mounted curbing doji for knots with bearing surfaces and knives for partial removal of the bark with cutting edges located below the level of the bearing surfaces of knives for cutting branches and at an angle to the direction of movement of the tree, with the bolt heads located in the slots of curved knives, having the appropriate shape, the bolt heads are connected Curved knives and tool holders in the zone of greatest curvature of the knives protrude beyond the bearing surface of the knives, while on the projecting part of the bolt heads there are knives for partial removal of the cortex, which can be made in the form of a rotating body or a polyhedron. FIG. 1 shows a device, a general view, (when processing trees in areas where there is no need for partial removal of the bark); FIG. 2 - the same (with partial removal of the cortex); in fig. 3 is a view A of FIG. one; in fig. 4 shows a section BB in FIG. 2; in fig. 5 to 7 is a view B in FIG. 3 (various embodiments of knives for partial removal of the cortex). The device for pruning knots comprises a base 1, on which the tool holders 2-4 are fixed, with the tool holders 3 and 4 fixed on the base 1 rotatably. The tool holders are bolted to fit 5 curved knives 6-8 for pruning branches with bearing surfaces 9. The heads 10 of bolted joints 5 knives and tool holders in the zone of the greatest curvature of knives 6-8 have the shape of polyhedra, for example a square, part of which stands for the bearing surface 9 of the knives, and the side faces of the heads 10 are angled to the direction of movement of the tree, with the angle being less than the angle of friction of the bark on steel. On the protruding part of the heads 10 are located knives 11 for partial removal of the cortex. Knives 11 for partial removal of bark can be made in the form of a body of rotation 12 and a polyhedron, for example treugatnik 13 or trapezium 14. The bearing surface of knives 1 1 for partial removal of bark is at an angle a to the direction of movement of the treated tree, which results in better copying the surface of the barrel, and between the blades 6-8 and the heads 10 of the bolted joints 5 located in the zone of greatest curvature of the knives, gaskets 15 are installed to adjust the gap between the bearing surface of the knives 11 and the bearing surface 9 of knives for pruning boughs. The device works as follows. The wood to be processed 16 is moved with movable delimbing knives 7 and 8 against the knife 6 and is moved by the delimbing machine through the formed closed cutting contour. When processing tree sections with diameters of 14–16 cm, only pruning of knots occurs, and knives AND stripping of pruning residues, since knives 11 are located in areas of greatest curvature of knives 6-8 and the bark does not touch. In the process of moving the tree being processed, its diameter decreases in the area of the closed cutting contour of the device and with diameters less than 14-16 cm knives start working.

11, which partially debark the surface of the trunk, cut the bark to the top of the treated tree.

The proposed delimbing machine performs two operations at once: delimbing

and the manufacture of thinning on tonkomer non wood intended for alloying, moreover, the device is structurally simple, which ensures a quick change of knives for partial removal of the bark.

eleven

ten

Type A

BB

Type B

5

Type B

Claims (3)

1. DEVICE FOR CUTTING BITS, containing a base with tool holders and mounted on them by bolting curved knives for cutting knots with supporting surfaces and knives for partial removal of the bark with cutting edges located below the level of the supporting surfaces of the knives for cutting knots and at an angle to the direction of movement of the tree, while the bolt heads are located in the nests of curved knives having a corresponding shape, characterized in that, in order to simplify the device and increase ffektivnosti, bolting head curved blades and tool holders in the area of greatest curvature of the blades protrude beyond the supporting surface of the blades, while on the projecting portion are located bolt heads knives for partially removing the bark. 2. The device according to π. 1, characterized in that the knives for partial removal of the bark are _made in the form of a body of revolution. 3. The device according to π. 1, characterized in that the knives for partial removal of the bark are made in the form of a polyhedron.