JPH0310832Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention relates to a chainsaw, an unmanned pruning machine that pruns while spirally climbing around a standing tree.

(Prior Art) This type of pruning machine generally holds a standing tree between an inclined drive wheel installed on the main body of the pruning machine and a driven wheel installed on an auxiliary frame facing the main body of the pruning machine. The structure consists of a chain saw that protrudes above the machine body while climbing in a spiral around the machine.

By the way, it is preferable to use a chainsaw to cut the base of a branch by moving it along the trunk surface of the tree as much as possible when the pruning machine spirals around the tree. In order to meet these requirements, a pruning machine has a structure in which the lower end and middle part of the chain saw are horizontally rotatably supported on the main body of the chain saw, and the cutting side of the chain saw is biased toward standing trees by a biasing means. has been proposed (Utility Model Application No. 58-45654).

(Problem to be solved by the invention) The conventional pruning machine described above can prun from the base of an upright tree such as a cedar, but when trying to prune a bent tree with a bent trunk, it As a result, the upper end of the chainsaw may damage the surface of the trunk, or the chainsaw may become too far away from the surface of the trunk, making it impossible to prun from the base of the branch, and the remaining branches will prevent the pruning machine from spirally climbing. There is a risk that it will become.

This idea was developed in view of the above-mentioned points, and aims to provide a pruning machine with a simple structure that allows the chainsaw to move along the surface of the trunk of a bent tree, pruning from the base of the branch. It is.

(Means for Solving the Problem) The gist of this invention to achieve the above object is to pivot the lower end and intermediate portion of the saw bar of the chainsaw to the main body of the pruning machine so as to be horizontally rotatable. The cutting side of the saw is biased toward the standing tree by the biasing means, and the intermediate pivot of the saw bar is moved in the direction of movement relative to the machine body so that the saw bar can be tilted between the standing tree side and the front of the standing tree around the lower end pivoting part. This is to allow swinging orthogonal to the tree, and to bias it toward the standing tree using the biasing means.

(Function) According to the pruning machine of this invention, when spirally climbing along a standing tree, the chainsaw protruding upward from the machine body rotates horizontally around the pivot at its lower end and middle part, and It moves along the surface of the trunk while tilting between the tree side and the front of the tree, using the lower end pivot as an axis, and performs pruning work by cutting branches from near the base of the branch.

(Example) Hereinafter, an example of this invention will be described based on the drawings.

FIG. 1 is a left side view of the general outline of the pruning machine, FIG. 2 is a front view of the main parts, FIG. 3 is a perspective view of the main parts, and FIG. 4 is a sectional view taken along the line -- in FIG.

In Fig. 1, reference numeral 1 denotes the main body of the pruning machine, and four parallel inclined driving wheels 2 are provided on the top and bottom of the back surface of the main body 1, and a drive shaft rotated by a small engine 3 mounted on the main body 1. 3a (Figures 2 and 3)
The rotational force is transmitted to each drive wheel 2 via the rotation transmission mechanism 3b (FIG. 2) and driven.

4 is an auxiliary frame placed facing the machine body 1,
There are 4 to 6 driven wheels 5 on the top and bottom of the back side of this auxiliary frame 4.
is rotatably attached to the shaft.

6 is a connecting member with a spring 6a interposed therebetween;
One end of the book connecting member 6 is pivotally attached to the upper and lower sides of both sides of the machine body 1, and the other end of each connecting member 6 is removably engaged with an engaging tool 6b attached to the upper and lower sides of both sides of the auxiliary frame 4. .

In FIGS. 2 to 4, reference numeral 7 denotes a chase saw protruding above the machine body 1, and a saw bar 7.
A saw 7b rotatably arranged around the sprocket 7 is placed near the lower end of the saw bar 7a.
c and is driven clockwise (in Figs. 2 and 3) by rotation of sprocket 7c. Note that the sprocket 7c is connected to the drive shaft 3a of the drive wheel 2.
It is attached to the end and is driven by the small engine 3. Further, 7d is a saw cover attached to the non-cutting side of the chainsaw 7 (FIG. 2).

Reference numeral 8 denotes a guide member having a roller 8a rotatably attached to its tip, and the proximal end of this guide member 8 is fixed to the upper end of the saw bar 7a with its tip protruding in the traveling direction of the chainsaw 7 and toward the standing tree A side. has been done.

Reference numeral 9 denotes an arcuate guide member with a roller 9a rotatably attached to its tip.
It protrudes to the side and is fixed to the lower end of the saw bar 7a. Further, on the upper surface of the proximal end of the guide member 9, a pivot pin 1, which will be described later, is fixed to the machine body 1 side.
A pivot hole 9b, which is slightly larger than the pin 12, is formed into which the pin 2 is loosely inserted.

Reference numeral 10 denotes a pivot pin, and the mounting bracket 10 is inserted so that the pivot pin 10 is located approximately directly above the pivot hole 9b.
It is fixed to the middle part of the saw bar 7a via a.

Reference numeral 11 denotes a pivot fitting having an elongated hole 11a into which the pivot pin 10 is loosely inserted, and this pivot fitting 11 is fixed to the machine body 1 side via a mounting member 11b.
The direction of the long hole 11a of the pivot bracket 11 is perpendicular to the direction of movement of the machine body 1, in other words, when the pruning machine is attached to the tree A,
The pivot pin 10 is set to be movable between the front sides.

12 is a pivot pin that is loosely inserted into the pivot hole 9b, and this pivot pin 12 is attached to the support member 1 on the machine body 1 side.
2a.

In this state, the chainsaw 7 is attached to the machine body 1 at the lower end and intermediate pivot portions (9) of the saw bar 7a.
b, 12 and 10, 11a), and the lower end pivot portion (9b, 11a) of the saw bar 7a.
12) A standing tree A in the range of the long hole 11a with the axis
It is arranged so that it can be tilted freely between the side and the front of standing tree A. Note that when the chainsaw 7 horizontally rotates and tilts, the sprocket 7c for driving the saw 7b is fixed in a fixed position, but since a certain amount of slack is provided in the saw 7b, the chain saw 7 horizontally rotates and tilts. is allowed.

Reference numeral 13 denotes a tension spring as a biasing means for biasing the cutting side of the saw 7b of the chainsaw 7 toward the standing tree A side.
The saw cover 7d is stretched between the lower part of the saw cover 7d and the machine body 1.

14 connects the contact surface of the chainsaw 7 to the standing tree A.
This push spring 14 is fixed to the machine body 1 near the pivot fitting 11 via a support fitting 15, and the upper end of the push spring 14 is attached to the pivot pin 10. It is brought into contact with the mounting bracket 10 of.

In FIG. 2, reference numeral 16 indicates a machine body cover, and reference numeral 17 indicates a chainsaw oil supply pipe.

By the way, in the above embodiment, the tension spring 1
Although two biasing means, 3 and push spring 14, are used, it is also possible to omit the tension spring 13 and have the push spring 14 also serve as the biasing action of the tension spring 13.

Next, to explain the operation mode of the pruning machine of the above embodiment, as shown in Fig. 1, the main body 1 of the pruning machine and the auxiliary frame 4 are connected with a connecting member 6 with the standing tree A sandwiched therebetween, and a small The driving wheel 2 is driven by the engine 3, and the saw 7b of the chainsaw 7 is rotated in a specific direction to spirally climb the tree A. In this spiral climbing state of the pruning machine, the cutting side of the chain saw 7, especially the saw 7b, is connected to the upper and lower guide members 8, which are attached to the trunk surface of the tree A,
The chainsaw 7 moves along the surface of the trunk of the tree A via the rollers 8a and 9a of 9, and as mentioned above, the chainsaw 7 not only rotates in the horizontal direction,
Since the tree leans between the tree A side and the front side of tree A, even if tree A is bent, pruning is performed from the root of the branch.

(Effects) As explained above, since the pruning machine of this invention has the above-described configuration, it has the following effects.

In other words, the chainsaw not only rotates horizontally along the trunk surface of a standing tree, but also tilts between the standing tree side and the front side of the standing tree, so it can cut not only upright trees but also bent trees from the root of the branch. It can be pruned, and is structurally less complicated than the conventional pruned wood mentioned above, and can be manufactured relatively easily.

[Brief explanation of the drawing]

The drawings show an embodiment of the pruning machine of this invention. Fig. 1 is a general left side view of the pruning machine, Fig. 2 is a front view of the main parts, Fig. 3 is a perspective view of the main parts, and Fig. 4 is a left side view of the general outline of the pruning machine. FIG. 4 is a sectional view taken along the - line in FIG. 3; 1...Pruning machine body, 2...Drive wheel, 3...
Small engine, 4... Auxiliary frame, 5... Driven wheel, 6
...Connecting member, 7...Chain saw, 7a...Saw bar, 7b...Saw, 8, 9...Guide member,
9b... Pivot hole, 10, 12... Pivot pin, 11
a...Long hole, 13...Tension spring, 14...
push spring.

Claims (1)

[Claim for Utility Model Registration] A tree is held between an inclined drive wheel installed on the main body of the pruning machine and a driven wheel installed on an auxiliary frame facing the main body of the pruning machine, and the tree is spirally climbed around the tree. In a pruning machine that performs pruning using a chainsaw that protrudes upward from the main body of the machine, the lower end and middle part of the saw bar of the chainsaw are horizontally rotatably pivoted relative to the main body of the pruning machine, and the cutting side of the saw is biased toward the standing tree. energizing the saw bar by a means, and allowing the intermediate pivot part of the saw bar to swing relative to the machine body perpendicular to the direction of movement thereof, so that the saw bar can be tilted between the standing tree side and the front part of the standing tree about the lower end pivot part; A pruning machine characterized by being biased toward standing trees by a biasing means.