JPS6152222A - 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] <Industry> Second Field of Application The present invention is a tool that is attached around a tree trunk, can be moved up and down along the tree trunk, and automatically cuts unnecessary branches while rotating the blade. This invention relates to improvement of the blade device of an automatic pruning machine.

<Conventional technology> Some pruning machines have a machine body and a blade part that move up and down in a helical manner relative to the tree trunk, and others where the frame of the machine body moves up and down vertically.
There are two types of blade parts: one that rotates around the machine frame-1 and moves up and down in a helical manner relative to the tree trunk.

However, these automatic pruning machines mainly use chainsaws as cutting tools, so even though the tree trunk is always bent to a greater or lesser degree, the chainsaws are
It is long at the bottom, making it difficult to follow the tree trunk, which can leave the base of the branch uncut, but it also has the disadvantage that the chainsaw can dig into the tree trunk, damaging the tree trunk or causing the chainsaw to cut it. In order to solve the problem of the cutter digging into the tree trunk and leaving branches uncut even when the tree trunk is bent and deformed, shorten the length of the cutter as much as possible, and install a cutter guide that follows the outer circumference of the tree trunk near the top and bottom of the cutter. It is preferable to provide one.

The present invention provides a new structure that allows the blade of a pruning machine to reliably come into contact with branches so that random branches of various sizes that exist around the outer periphery of a tree trunk can be pruned reliably. It is something.

<Problems to be solved by the invention> The present invention further improves the structure of the automatic pruning machine as described above,
In order to reliably cut randomly located branches, the blade part is elastically supported on the main body of the branch cutting machine so that it can swing up and down, and a special guide is provided on the blade part to ensure that the blade cuts branches reliably. The aim is to provide a new structure that promises to perform pruning as reliably as or even better than when conventionally done by humans with a saw or rudder, and to improve work efficiency. It is something to raise.

<Means for Solving the Problems> In the present invention, in order to solve the above-mentioned problem, in an automatic pruning machine that can move up and down along the tree trunk, a pruning machine that can move up and down along the tree trunk is provided with A cutting tool guide having an elongated and circular or semicircular detection section at the tip is fixed to the cutting tool section, and the cutting tool section and the cutting tool guide are integrally supported elastically so as to be swingable at least upwardly in a direction perpendicular to the tree trunk. This made it possible to arrange the parts in contact with each other in the tangential direction of the surroundings.

<Function> With this type of structure of the blade device, the blade swings up and down to reliably cut branches that are randomly present, and the blade also completely contacts the tree trunk to reliably cut the branches. be able to.

Hereinafter, the apparatus of the present invention will be specifically explained with reference to Examples.

<Example> FIG. 1 is a schematic perspective view of a pruning machine equipped with this device.

The pruning machine has a machine frame (1), an engine (2), a cutter part (3),
The running wheel (4) is connected to the ring rail (4), and the engine (2) and part of the cutter 3 (3) are connected to the ring rail (5) together with the outer rack gear (5).
6) around the trunk (15) and branch (11)
cut. The output of the engine is transmitted through the gear case (10) to the cutter section (3), to the rotational power of the output shaft that meshes with the inner gear of the ring rail (6), and from the outer rack gear (5) to the traveling transmission (7). ) pinion gear (8
) is supplied to the running power to the running wheels (4).

FIG. 2 is a front view of the blade part (3), and FIG. 3 is a side view. The blade part (3) and the blade guide (31) are integrally supported elastically so as to be swingable in a direction perpendicular to the tree trunk. That is, the chainzo (20) provided on the cutter part (3) has links (21a) of different pitches in order to be able to swing.
It is attached to the pruning machine main body machine frame (1) using two pieces (21b). Mounting base (22) for chainsaw (20)
The base is wide. To install the chainzo (20), use the blade guide (31) at the tip of the base (22).
The detection unit (23) and its blade guide arm (2
4), and a guide roller is provided at the tip thereof. In this device, the drive shaft (25) of the chain saw (20) is provided at a position set back by more than a column diameter from the branch cutting side of the chain saw (20). The mounting base (26) of the drive shaft (25) has a substantially horseshoe shape, and is mounted so as to be adjustable in position through a plurality of elongated holes provided in the mounting base (22) of the chainsaw (20).

One end of the links (21a) (21b) having different pitches is attached to the other end of the drive shaft mounting base (26). The other ends of the links (21a) and (21b) are pivotally supported by a machine frame mounting bracket (27), and elastically supported by springs (28) and (29), respectively. A bendable support link (30) is provided between the tip of the machine frame mounting bracket (27) and the mounting base (26) of the drive shaft (25).
is provided. These elastically support the blade part (3) and the blade guide (31) so as to be able to swing upward in a direction perpendicular to the stem.

Here, the structure of the blade guide (31) will be explained.

Branches are generally located randomly on the tree trunk, and the location of the cut cannot be predicted. If the branch is near the center of the knife, the cutting will continue to be good. However, if the branch is near the upper tip of the knife, without the knife guide, a part or half of the branch will be partially cut, making it impossible to make a complete cut. This can be eliminated by installing a knife guide. In particular, according to the invention it is possible to cut completely. Figure 2 shows the situation.

Branch A (11) is the cutter guide arm (24) as shown in the diagram.
If it is on the center line M of the cutter guide arm (24)
The guide roller, which is the detection part (23) at the tip, is connected to the branch A (11
), it rolls either up or down and the entire blade group swings either up or down. When the center of the branch B (11,) is above the center line M of the knife guide arm (24), the entire knife group swings downward and no cutting is performed. On the other hand, if the center of the branch C (11) is below the center line M of the knife guide arm (24), the entire knife swings upward and the branch C (11) is cut. In this way, the detection section (23) provided at the tip of the blade guide arm (32) can determine whether or not the branch (11) can be cut.

The specific structure of the detection unit (23) is not limited to the roller described above, but also includes a blade guide arm (24) with a semicircular tip, and a round bar shaped into a ring and attached to the tip of the blade guide arm (24). An elliptical plate with one end rotatably supported and the other end protruding vertically, with a spring interposed between the cutter guide arm (24) and the ellipse plate, and a spherical plate attached to the cutter guide arm (24). A device that is elastically supported by a plate spring can also function as a detection section.

Specifically, the detection section (23) as described above can be provided at the tip of a knife guide arm (24) of an automatic pruning machine having a knife section as shown in FIG.

The blade part (3) is elastically supported so that it is always in contact with the tree trunk. For this purpose, as shown in the example shown in Fig. 4, a rotating base (3) is fixed to the engine gear case (10) and rotates on a ring rail (6).
4) Two parallel guide bars (36) (36) are arranged above by guide bar support fittings (35a) (35b), and a slide fitting (37) is slidably inserted into these. As shown in FIG. 4, this slide fitting (37) is pulled toward one guide bar support fitting (35a) by a spring (38).

This is to accommodate changes in tree trunk diameter. The blade part (3) is attached to such a slide fitting (37) so as to be able to swing back and forth. In addition, the blade part can be swung up and down the tree trunk, and this is based on the blade mounting base (22
) and the slide fitting (37) are connected to the tail link (21
)by. The rotation of the chainzo (20) is controlled by a flexible shaft (9) rotated by the engine and a drive shaft (25).
) are connected by a bevel gear (not shown).

In order to maintain a constant distance between the chainzo (20) and the tree trunk (15), a blade guide arm (24) is installed on the tree trunk contact side of the blade part (3), as shown in Figures 3 and 4. Tree trunk contact guides (39) (39) having rounded trunk contact sides are provided to the base (26) to which the links are attached.

By configuring the blade section of the automatic pruning machine as described above, it is possible to reliably prune branches that exist randomly and in various sizes around the outer periphery of a tree trunk.

<Effects of the Invention> Since the present invention has the structure as described in detail above, branches of various sizes can be reliably cut at random, and since the blade follows the tree trunk in response to the bends of the tree trunk, it is possible to cut branches to the tree trunk. It has the feature that there is no digging or uncut parts.

[Brief explanation of drawings]

FIG. 1 is a schematic perspective view of a pruning machine equipped with this device. FIG. 2 is a front view of the cutter part (3) of the first embodiment, and FIG. 3 is a side view of the same. FIG. 4 is a side view of another embodiment. (3) Cutlery section (20) Chain saw (21)
Link (23) Detection part (24) Blade guide arm (31) Blade guide (35a) (35b) Guide bar support fitting (36) Guide bar (37)
Slide metal fitting (38) Spring (39) Tree trunk contact guide

Claims (1)

[Scope of Claims] 1. An automatic pruning machine that can be raised and lowered along a tree trunk, and which has a detection portion (23) that extends from the top of the blade in the direction of movement of the blade to the tip of the blade and has a circular or semicircular tip. The guide (31) is fixedly provided to the cutting tool part (3), and the cutting tool part (3) and the cutting tool guide (31) are integrally supported elastically so as to be swingable at least upwardly in a direction perpendicular to the tree trunk, so that the tangent line around the tree trunk is fixed. A blade device for an automatic pruning machine characterized by being arranged in contact with each other in the direction. 2. When integrally supporting the blade part (3) and the blade guide (31) so that they can swing freely in the vertical direction of the tree trunk, a plurality of links (21) with different pitches are used to connect the machine body and the blade part, and the blade part 2. A blade device for an automatic pruning machine according to claim 1, wherein said part is supported substantially vertically. 3. Claim 1, characterized in that the blade part (3) is slidable in the radial direction of the tree trunk along a guide bar (36) provided on the body and is supported so as to be pressed against the outer periphery of the tree trunk. The blade device of the automatic pruning machine described.