JPH032126Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a bark peeling cutter suitable for forming two cuts around a tree and another cut between these cuts.

[Conventional technology]

One type of forestry work in mountain forests, etc. is thinning of unnecessary trees. This thinning work promotes the growth of seedlings and mature trees by maintaining appropriate distances between trees and improving sunlight and ventilation. However, the working environment is not very good for the workers, as is the case with logging work.

Therefore, in order to reduce the workload, a method has been adopted in which the trees to be thinned are allowed to wither without being cut down, and the remaining mature trees are allowed to receive more sunlight and better ventilation.

As a way to make unnecessary trees die back,
Conventionally, two cuts are made around the trunk of a tree using a knife such as a sickle, and the bark between the cuts is peeled off to expose the bark in a circular shape.

[The problem that the idea aims to solve]

However, making cuts around the tree trunk with a sickle or the like and stripping off the bark requires many steps and time, and is not profitable. Moreover, since the working environment is a high-humidity atmosphere, workers still tend to avoid it.

Therefore, the bark peeling cutter of the present invention was developed for the purpose of mechanically and efficiently performing the work of peeling bark.

[Means to solve the problem]

In order to achieve the purpose, the bark peeling cutter of the present invention includes a frame component, two cutting knives arranged parallel to one end of the frame component, and two cutting knives attached to the other end of the frame component. and a vertical splitting knife that makes a cut in the direction perpendicular to the cut between the cuts in the bark formed by the two cutting knives, and the tree clamper cuts the bark in the direction perpendicular to the cut between the cuts in the bark formed by the two cutting knives. The tree clamper is characterized in that it can be fixed movably in the longitudinal direction, and that a roller that rolls on the surface of the tree is provided at the tip of the clamper arm of the tree clamper.

〔Example〕

Hereinafter, the present invention will be specifically explained by way of examples with reference to the drawings.

As shown in FIG. 1, the bark peeling cutter of this embodiment includes a frame component 10 that also serves as a handle and forms a space for accommodating a tree T. One end of this frame component 10 forms a pair of arms 11 that stand up. Arm 11
are parallel to each other, and a shaft 12 is attached so as to pass through both arms 11. Further, these arms 11 are integrated by a connecting member 13.

A nut is fixed to the intermediate portion of the connecting member 13, and a female threaded portion 14 is provided with a hole concentric with the female threaded hole formed by the nut. and,
A male screw 15 is screwed into this female screw portion 14.

Boss portions 16a of two cutting knives 16 that operate as cutters are fitted into the shaft 12. The spacing between these cutting knives 16 corresponds to the bark peeling width dimension.

Further, these cutting knives 16 are connected and integrated by a connecting plate 16b in a U-shape when viewed from above.

One end of the male thread 15 screwed into the female threaded portion 14 comes into contact with this connecting plate 16b. This allows the cutting knife 16 to be pressed against the tree T.

A knife tip 16c capable of cutting into the bark is formed at the tip of each cutting knife 16.

A plate-shaped vertical cutting knife 17 is attached to the tip of the arm 11 along a line connecting the cutting knives 16. This vertically split knife 17 has one end formed into a blade edge 17a, and the other end formed into a striking edge 17b that can be struck with a hammer or the like.

In addition, a long hole 17 is provided in the center along the longitudinal direction.
c is drilled.

A guide piece 11a is provided at the tip of the arm 11 to connect both arms 11. Then, the vertically split knife 17 is attached by inserting a bolt 11b into the hole bored in the guide piece 11a and the long hole 17c of the vertically split knife 17, and screwing the wing nut 11c into the bolt 11b.

A linearly long window hole 21 is bored on both sides of the other end of the frame component 10 . A clamper arm 22 is arranged so as to surround the portion where the window hole 21 is formed. A fastening hole 22 a is bored in the base of the clamper arm 22 in correspondence with the window hole 21 of the frame component 10 . The tightening bolt 23 passes through the window hole 21 and the tightening hole 22a.
By inserting the frame component 10
A clamper arm 22 is rotatably attached to the clamper arm 22 .

Furthermore, a pivot 24 is attached to the tip of the clamper arm 22. A holder 26 equipped with a clamp roll 25 is attached to the pivot shaft 24 so as to be rotatable in a plane perpendicular to the tree T. In this way, the tree clamper 20 having a portion that can be brought into close contact with the tree T formed by the clamp roll 25 is constructed.

Next, using the above bark peeling cutter,
Explain the process of stripping the bark from a tree.

First, a bark peeling position is determined on the tree T whose bark is to be peeled, and a bark peeling cutter is applied to that position. Then, the tree clamper 20 is moved along the window hole 21 of the frame component 10 so as to match the approximate diameter of the tree T, and the frame component is tightened by tightening the tightening bolt 23 with the moving device. A tree clamper 20 is fixed to the tree 10.

Next, the male screw 15 screwed into the female screw portion 14
to adjust the amount of penetration of the knife tip 16c of the cutting knife 16 into the bark. As a result, the bark peeling cutter has a knife tip of 16c.
The tree T is held at a predetermined position by the clamping force between the tree T and the tree clamper 20.

After that, the bark peeling cutter is manually applied to the tree T.
When the cutting knife 16 goes around once, two cuts are formed in the bark by the knife tip 16c of the cutting knife 16. If the cut is shallow, the cutting edge of the knife tip 16c is deepened little by little, and the bark peeling cutter is made to go around the tree T two and three times to form the cut by the cutting knife 16 to a predetermined depth.

When the cut made in the bark reaches an appropriate depth, tighten the vertical split knife 17 to the guide piece 11a, loosen the screw nut 11c fastened to the guide piece 11a, and then remove the vertical split knife. 17 striking edges 1
7b with a hammer or the like, this causes the vertical splitting knife 17 to move forward so as to cut into the bark,
A cut along the length direction of the tree T is formed between two cuts made with a cutting knife 16.

That is, the bark is cut from the tree T in an annular shape by cuts made in the tree T by the pair of cutting knives 16. Then, by making cuts with the vertical splitting knife 17 on this annularly cut bark, the bark cut from the tree T becomes band-shaped. By peeling off this belt-shaped bark from the tree, a ring-shaped bare part can be formed on the tree T.

[Effect of idea]

As explained above, in the bark peeling cutter of the present invention, two cutting knives are provided at one end of the frame component and a tree clamper is provided at the other end.
By moving the tree clamper according to the diameter of the tree whose bark is to be peeled off, the tree is held between the cutting knife and the tree clamper, and in this state, the resin peeling cutter is passed around the tree. Two circular cuts are made in the bark, and then a longitudinal cut is made in the bark using a vertical splitting knife. By pulling one end of the bark, which has been cut into a band in this way, in a direction away from the tree, a ring-shaped bare part is formed, making it easier to remove unwanted trees to a standing condition. It can be carried out.

[Brief explanation of the drawing]

Fig. 1 is a side view of a bark peeling cutter according to an embodiment of the present invention, Fig. 2 is an overall perspective view of the same cutter, Fig. 3 is a sectional view taken along the - line of Fig. 1, and Fig. 4 is a - It is a sectional view along a line. 10: Frame component, 11: Arm, 1
2: Shaft, 13: Connecting member, 14...Female screw part, 1
5...Male thread, 16: Cut knife, 16a...Boss part, 16b...Connection plate, 16c...Tip knife, 1
7: Vertical split knife, 17a...blade edge, 17b...blow edge, 20: tree clamper, 21...window hole, 22: clamper arm, 22a...tightening hole, 23...tightening bolt, 24...pivot, 25: clamp Laura, 26:
holder.

Claims (1)

[Claims for Utility Model Registration] A frame component, two cutting knives arranged in parallel at one end of the frame component,
The tree clamper is attached to the other end of the frame component, and a vertical splitting knife makes a cut in the bark in a direction perpendicular to the cut between the cuts formed by the two cutting knives. , the tree clamper can be fixed movably in the longitudinal direction of the frame component,
A cutter for peeling bark, characterized in that a roller that rolls on the tree surface is provided at the tip of the clamper arm of the tree clamper.