JPS6070019A - 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 The present invention relates to a pruning machine that cuts branches of standing trees while ascending and descending along the standing tree, and in which the chamber of the chain saw for branch cutting is inclined with respect to the direction of movement, and the chain saw is used to cut branches of standing trees. A large number of branches are cut on two or more sides.

This type of conventional pruning machine 1O has a lifting device 1F- which moves up and down along the tree T as shown in FIGS. -12 etc., and while the lifting device 11 is raised along the tree T, the chain saw 12 rotates around the tree T to cut the branch T. By the way, in order to grow high quality unreinforced timber,
The branch t must be cut from the pedestal t', which is the root, to the surface of the tree T, but the pedestal t' has a fairly large diameter (usually the diameter of the pedestal is approximately twice the diameter of the branch). can be,
Therefore, the cutting area is approximately four times as large), and when cutting the branch t, an extremely large load is placed on the chain saw 12 due to the swinging of the branch t, and therefore the cutting resistance is extremely large. Even if it is adopted, branch t
It is extremely difficult to cut smoothly and effortlessly. In addition, in order to cultivate high-quality wood, it is necessary to cut branches with a chainsaw 12.
The surface to be cut (i.e. the cut end) is a smooth smooth surface,
It is necessary to prevent the infiltration of rainwater and pathogenic bacteria from the surface to be cut, but when cutting the branch t from its pedestal t' with change-12 as described above, Change -1 due to swinging or excessive load
2 vibrates in the lateral direction, the cut surface of the branch T becomes a rough surface with unevenness, and there are problems such as rainwater entering through the rough surface and causing the standing tree T to corrode. Change again
Since the 12 chambers 12a were installed in a straight upright position, there was a considerable distance over the entire length between the saw chain 12b running along the front surface of the tree 1 and the front surface of the chamber 12a. It is not possible to cut the surface of the
There were drawbacks such as the surface of the standing tree T being damaged by the upper and lower circumferential parts a' and b' of -2 b. As described above, with this type of conventional pruning machine, it is difficult to cut the branch t smoothly from the base t', and the surface to be cut by the engineer does not have a sufficiently smooth surface. It has various drawbacks such as not being able to cut the skin of the tree T without smoothing it and easily damaging the surface of the tree T, and these drawbacks have been one of the reasons why this seed pruning machine has not been widely used.

Therefore, the present invention has been made in consideration of the above points, and the purpose of the present invention is to smoothly cut a branch from its pedestal to the skin of a standing tree, and to make the surface to be cut smooth and smooth. The purpose of the present invention is to provide a pruning machine having various excellent features such as cutting, and in order to achieve this purpose, the chamber of the chain saw is inclined with respect to the direction of movement of the chain saw to such an extent that the circumferential part of the saw chain is separated from the surface of the standing tree. The chainsaw is attached to a lifting device, and the effective cutting length of the chainsaw is approximately twice or more the height of lift during one revolution of the chainsaw around the standing tree. The tree is cut on two or more sides, and in the first cut, the branches are removed from a relatively small diameter part away from the epidermis of the tree, and in the second cut, the branches left uncut in the first cut are removed. The pedestal was cut to the skin of a standing tree. In other words, by cutting the branches in this way, the second and subsequent branches can be cut smoothly against the skin of the standing tree, and the cut surface can be joined to the smooth surface. The upper and lower rotating parts of the saw chain prevent damage to the surface of the tree.

Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 and FIG. 2 show how pruning work is performed by the pruning machine according to the present invention. When the lifting device 1 lifts the tree T, the chainsaw a rotates upward in the direction of arrow (A) around the tree T in a helical manner, and lifts the tree T. This is to cut the branch t. The change-2 is equipped with a chamber 2a and a saw chain 2b that rotates around the chamber 2a. It is attached to the lifting device 1 with an angle θ tilted forward from the line T' of the tree T, that is, from the height direction of the tree T, so that the saw chain 2b is attached to the chamber 2.
Circulating parts a and b that circulate along the upper and lower ends of a are far from the surface of the tree 1, but are located near the approximate center of the front surface of the chamber 2a C.
In this case, the saw chain 2b is very close to the surface of the tree 1 and almost in contact with the surface of the tree 1. Further, the front part of the chamber 2a is partially cut away to form a cavity 2C. The space 2C prevents the chamber 2a from being inserted into the cut surface of the branch t when cutting the branch t in change-2, and the sliding friction makes it difficult to cut the branch t. It was designed to prevent this. Also change-2
The effective cutting length (length in the height direction that can cut the branch t) of the effective cutting part of is approximately twice the height h that Change-2 rises during one rotation around the tree T, or 2 There are more than twice as many
Therefore, the cutting of branch t by change-2 is at least 2
It will be held twice. 511S2 is for saw chain 2b drive guide. FIGS. 3 and 4 are M-N cross section and N-N cross section in FIG. 1.
This is a cross-sectional view, and since the chamber 2a is tilted forward as described above, the distance D1 between the saw chain 2b running on the front surface of the upper part of the chamber 2a and the surface of the tree 7 is quite large, so in the upper part of the chamber 2a, branch t
is cut from a relatively small diameter portion that is quite far from the surface of the tree 7 (see also Figure 2). In addition, at the front of the lower part of the effective cutting part, the saw chain 2b is almost in contact with the surface of the tree 7, and the distance between them is extremely small. It was cut to 2, and saw chain 2
Since the lower revolving part b is away from the surface of the standing tree 7, the lower revolving part of the saw chain 2b does not damage the surface of the standing tree 7.

The main pruning machine A is constructed as described above, and the pruning work will be explained next.

When the main pruning machine A is set on the standing tree T and a drive unit (not shown) consisting of an engine or the like is driven, the lifting device 1 rises along the standing tree T, and at the same time, the change-2 is moved to the standing tree T.
The branch t that protrudes from the surface of the tree 7 is cut by rotating in a spiral pattern around the tree 7 in the direction of arrow (A). By the way, since the effective cutting length H of Change-2 is approximately twice or more than the above-mentioned rising height h of Change-2, the first cutting of the branch t is performed at or near the top of Change-2,
After Change-2 makes one more rotation around the tree T, a second cut is made at the bottom of the effective cutting section. FIG. 3 shows the state of cutting the branch for the first time. As mentioned above, since the distance D1 between the saw chain 2b at the front of the upper part of the chamber 2a and the surface of the tree 7 is large, the branch t is cut on the pedestal t' than? It is cut from a relatively small diameter section at the tip. In this way, if the first cutting of the branch t is performed at a relatively small diameter portion, the load on the change-2 will be correspondingly small, and therefore the branch t can be cut without difficulty. Furthermore, since the enucleation t swings, and the lower part of the chamber of a chainsaw is generally attached to a frame, etc., and the upper part of the chamber is a free end, the lateral vibration of the chamber 2a tends to be large. Therefore, the surface to be cut of the branch t becomes a rough surface with unevenness, but the first cutting of the branch t is done by roughening the branch t so that the second cut by the engineer, which will be described later, can be carried out smoothly. Therefore, even if the surface to be cut of the first branch t is rough,
There is no problem with insults.

As described above, the first part of branch t is
After the first cut is made, the chain saw 2 makes one rotation around the tree T, and the branch t is cut a second time using the lower part of the effective cutting part of the change-2. FIG. 4 shows how the branch t is cut in the second time. As mentioned above, the distance D2 between the saw chain 2b and the surface of the tree 7 at the lower part of the effective cutting part is extremely small. The pedestal t' of the branch t left uncut by cutting is cut to the surface of the standing tree T. In this case, the branch t has fallen off due to the first cutting, and only a small portion of the pedestal t' remains, so the branch t will not sway during the second cutting, and the chamber 2a The vibration of the change-2 is also small, so no unnecessary excessive load is applied to the change-2, and the large-diameter pedestal t' can be cut without difficulty. Further, the surface of the standing tree 7 is not damaged by the circumferential parts a and b of the saw chain 2b, and the branches t are cut evenly against the surface of the standing tree T, and the cut surface is extremely smooth.

As described above, the branch t is cut twice, the first time cutting a relatively small diameter part away from the surface of the tree T to roughen the branch t, and the second time cutting the tree T's epidermis. If the pedestal t' is cut smoothly, the large-diameter pedestal t' can be cut without difficulty to the surface of the standing tree T, and the surface to be cut will be a smooth surface. There is no chance of the standing tree T being corroded by the infiltration of rainwater, and high-quality knot-free timber without tip or button material can be grown in a short period of time.

This type of pruning machine includes one that cuts the branches by moving the lifting device straight up along the tree while rotating a chain saw attached to the lifting device around the tree; There is a type of pruning machine in which branches are cut by a chainsaw attached to the elevating device while rotating upward in a helical shape along the vertical axis, but the present invention can of course be applied to any type of pruning machine. Alternatively, the effective cutting length H of the chainsaw may be set to less than twice the rising height h, and the branch t may be cut once at the lower part of the effective cutting part, but as in the above embodiment, the branch may be cut twice. It is better to do it face to face. It should be noted that most branches are also included in the present invention, and even if the mamber 2a is tilted backward, the above-mentioned embodiments can be applied.

It goes without saying that the present invention also includes a structure in which the chamber 2a is tilted rearward, since the same effect as that of the structure can be expected.

As explained above, the pruning machine according to the present invention comprises a lifting device 1 that moves up and down along a standing tree T, and a change-2 attached to the lifting device 1. 2a is attached to the lifting device 1 at an angle with respect to the direction of movement of the change-2, and the effective cutting length H of the change-2 is determined by the height of lift during one revolution of the change-2 around the standing tree T. Since the cutting length is approximately twice the length of the tree T, at least the majority of branches T are cut in two directions, with the first cutting cutting off the branch T, and the second cutting cutting the outer skin of the standing tree T. The pedestal t' can be cut smoothly, and the surface to be cut will be a smooth surface.
Since the surface of the standing tree T is not damaged, high-quality knotless timber can be grown in a short period of time.

[Brief explanation of drawings]

The figures show an embodiment of the present invention, in which Figures 1 and 2 are side views during pruning, and Figures 12 and FA are side views during pruning using a conventional pruning machine.
They are a front view and a sectional view. A... Branching machine T... Tree t... Branch 1... Lifting device 2... Change-2a... Chamber H... Effective cutting length h... Lifting height Applicant End Yasunaga Saki Patent Attorney Toshiyuki Takamatsu Figure 5 Figure 7

Claims (1)

[Claims] A pruning machine comprising a lifting device that moves up and down along a standing tree, and a chainsaw attached to the lifting device, wherein the chamber of the chainsaw is attached to the lifting device with a chamber inclined with respect to the traveling direction of the chainsaw, and the chain saw A pruning machine characterized in that the effective cutting length of the chain saw is approximately twice or more of the height of rise during one revolution of the chainsaw around the standing tree.