JPS61108313A - Blade apparatus of automatic pruning machine - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] <7 Industrial Application Fields> The present invention is capable of cutting branches randomly existing on a tree trunk while ascending, minimizing the remaining length, and obtaining a smooth cut surface (cut). This is about a pruning machine that can be used.

<Prior Art> Chain saws and disc blades are mainly used as cutting blades for branch cutting machines. In the case of a chainsaw, the cut is bad and not smooth, and in the case of a single disc blade, if the branch hits the center of the disc, it will be a good cut with a small remaining branch length, but if it comes off, it will leave a large remaining branch length. This is undesirable for branching machines equipped with chainsaw type cutting blades.

For the purpose of smoothing the cut, an example in which milling force cutters are installed in parallel (for example, Utility Model Application No. 57-86560) has been proposed, but this method also has the disadvantages of the disk blade. No effect can be obtained unless the center of the blade passes over the remaining branch in one rotation of the cage.

<Problems to be Solved by the Invention> The present invention uses a chainsaw as a cutting blade that can reliably cut randomly existing branches, and solves the disadvantage of the poor cut.

<Means for solving the problem> Accordingly, in the present invention, the rotation direction of the cutting blade is in the radial direction of the tree trunk as a finishing blade placed at the rear of the chainsaw,
They developed a column-shaped blade whose outer periphery rotates along the outer periphery of the tree trunk.

Specifically, the finishing blade is composed of a columnar blade and guides (22) (24) attached to the columnar blade and in parallel behind it, and is supported with pressure against the tree trunk, more preferably. There are a plurality of columnar blades, and each of the plurality of columnar blades rotates in forward and reverse directions, and furthermore, there are two blades, a rough finishing blade (21a) and a main finishing blade (21b), in order from the direction of movement of the machine. The rotation direction is clockwise when the machine is turning counterclockwise when viewed from above the tree trunk, and it is extremely effective to achieve the purpose if the main finishing blade rotates counterclockwise.

With this structure, the finishing blade of the columnar blade smoothes the rough cut made by the chainsaw, resulting in a good finished state.

<Example> Embodiments of the present invention will be described in detail below with reference to the drawings.

Fig. '1 is a perspective view of a branching machine equipped with the cutter device of the present invention, and Fig. 2 is an enlarged sectional view of the finishing blade portion. Third
The figure is a sectional view taken along line AA in FIG.

FIG. 4 is an enlarged sectional view taken along line BB.

The illustrated pruning machine consists of a machine frame (1), an engine (2), a chain saw (3), a finishing blade (2G), and a running wheel (4). Tree trunk (9) along ring rail (6) with rack gear (5)
Cut the branch (11) by circling around it. The output of the engine is the power to the chain saw (3) and finishing blade (20) via the gear case (10), the turning power of the output shaft that meshes with the inner gear of the ring rail (6), and the outer rack gear (5). from the pinion gear (8) of the traveling transmission (7).
) is supplied to the running power to the running shaft (4).

As mentioned above, the feature of the cutter device of the present invention is that it is provided with a special finishing blade (20) in addition to the conventional chainsaw. This finishing blade (20) has columnar blades (21a) (21b) whose rotating direction is in the radial direction of the tree trunk and whose outer periphery rotates along the outer periphery of the tree trunk, and which contacts the tree trunk on the axis of the columnar blade. Rolled guide (22), columnar blade holder (2)
It consists of two upper and lower roller-shaped guides (24) (24) that are pivotally supported by 3) and contact the tree trunk, and the entire finishing blade (20) is supported against a stay (30) protruding from the ring rail (6). The pressing arm (31) is elastically supported by a spring (32) to maintain an appropriate distance between the columnar blades (21a) and (21b) and the tree trunk. The guide (22) may be in the shape of a sled, for example, as long as it can maintain an appropriate distance between the tree trunk and the finishing blade.

In order to maintain a good finish, it is preferable to provide a plurality of columnar blades, and moreover, it is preferable to rotate each of them in the forward and reverse order.6 The example shown in the figure is an example that allows for a good finish, and it Rough finishing columnar blade (
There are two blades: 21a) and a finished columnar blade (21b).The direction of rotation of the rough finish columnar blade (21a) is clockwise when the machine is turning counterclockwise when viewed from above the tree trunk, and the rotation direction of the rough finish columnar blade (21b) is clockwise when the machine is turning counterclockwise when viewed from above the tree trunk.
1b) is the opposite, counterclockwise. Therefore, the gears (26
a) (264) There are two intermediate gears (26b) (
26c) is provided. These columnar blades (21a)
(21b) has one finishing columnar blade (21b) inside the finishing blade gear case (27) and a bevel gear (28a) (28b).
) and a flexible shaft (29) to rotate while connected to the gear case (10) of the engine. In addition to the shape shown in the figure, the columnar blade may have a tapered shape that becomes thinner toward the tip.
If the chain saw (3) has a structure with multiple finishing blades (a) and the main finishing blade (21b), as shown in Fig. 3, the chain saw (3) first cuts the branch, and then uses the rough finishing blade (21b). 25a
) cuts most of the remaining branches and smoothes them, and then the main finishing blade (21b) finishes them smoothly. Even when the tree trunk is thin, the angle formed between the guide (24) and the finishing blades (21a) (21b) changes as shown by the two-dot chain line, and similar pruning is performed, resulting in a rough finishing blade (21a). By using the main finishing blade (21b) following this, it is possible to completely remove the bark on the upper part of the remaining branch length that remains after one-time finishing.

<Effects of the Invention> With the structure of the present invention as detailed above, the remaining branch length can be shortened, and the cut edge of the chain saw can be made smooth.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a branching machine equipped with a cutter device according to the present invention, and FIG. 2 is an enlarged sectional view of a finishing blade portion. 3 is a sectional view taken along line AA in FIG. 2, and FIG. 4 is an enlarged sectional view taken along line BB in FIG. (3) Chainsaw (20) Finishing blade (21a)
(21b) Columnar blade (22) (24) Guide (2)
3) Holder (25a) (25b) Shaft (26a) ~ (26d) Gear (27) Finishing blade gear case (28a) (28b) Bevel gear (29) Flexible shaft (30) Stay (31) Pressing arm (32)
) spring or more

Claims (1)

[Scope of Claims] 1. A finishing blade distributed to the rear of a chain saw of an automatic pruning machine that is movable up and down along the tree trunk and arranged in the longitudinal direction of the tree trunk above the machine body, the blade being rotated in the direction of the tree trunk radius. A blade device for an automatic pruning machine, characterized in that the finishing blade (20) is a columnar blade whose outer periphery rotates along the outer periphery of a tree trunk. 2. The finishing blade is composed of a columnar blade and guides (22) and (24) provided parallel to and behind the columnar blade, and is supported elastically against the tree trunk. Automatic pruning machine blade device. 3 Claim 1 or 2 in which there is a plurality of columnar blades
The cutter device described in section. 4. The cutter device according to claim 1 or 3, wherein the plurality of columnar blades rotate in forward and reverse directions, respectively. 5 The plurality of columnar blades are the rough finishing blade (21a) and the main finishing blade (21b) in order from the direction in which the machine moves, and the direction of rotation of the rough finishing blade is clockwise when the machine is rotating counterclockwise when viewed from above the tree trunk. The cutter device according to claim 1 or 4, wherein the final finishing blade rotates counterclockwise in the opposite direction.