JPH07132026A - Branch-trimming tool - Google Patents

Abstract

PURPOSE:To provide a branch-trimming tool capable of safely and surely trimming branches in a relatively light work from the surface of the ground without needing a skill. CONSTITUTION:A blade main body 3 having both blades is fixed to the tip of an expansive shaft, and a U-shaped handle 7 is attached to the lower part of the shaft 6. A vertically movable pipe-like weight 8 having approximately the half length of the shaft 7 is mounted on the shaft between the attaching parts of the handle. A detachable weight is attached to the pipe-like weight for adjusting the weight of the pipe-like weight, and bearings are attached to the upper and lower ends of the weight for the vertical smooth movement of the pipe-like weight. The shape of the back blade is preferably formed in an approximately flat shape, but the optimal shape blade can be selected according to the thickness of a branch, the kind of a tree, the topography, etc., as the blade of the ventral part.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pruning device used for pruning cedar, cypress, etc., and more specifically, pruning which enables easy and efficient pruning from the ground without climbing trees. It concerns the structure of the vessel.

[0002]

2. Description of the Related Art Conventionally, cedars and cypresses, which have been used as high-grade building materials such as floor pillars, have branches that have grown for about 6 meters from the ground in order to prevent the occurrence of dead nodes. In order not to leave a part of the tree on the trunk, the branches were pruned cleanly from the root with a saw, a saw, or a pair of scissors. The usual pruning work was carried out by climbing trees from the workers themselves and pruning them with a tuna, which was widely used as the most reliable and reliable method. It is a dangerous task, and it is a rigorous task of grasping the other hand with a hand and knocking down the branches manually, which is mentally stressful. When it gets weaker, the accuracy of hitting the same part will drop significantly, and the part of the branch may be left, as the position of the first one and the position of the second one dropped down will go wrong. There is a drawback and a drawback that the efficiency of pruning work is reduced at an accelerated rate, and it is impossible for a skilled worker who is confident in the strength of the arm to continue the work for a long time. In addition, this work required skill and was impossible for beginners and the elderly, but due to the rapid depopulation and aging in the forest regions today, pruning by this method is almost hopeless. However, instead of this, it has been long desired to develop a pruning device that can be safely and reliably implemented by beginners and elderly people.

A method of cutting off a branch from the ground with a saw with a long handle of about 6 meters was also used in some cases, but in this method, the saw is accurately placed at the root of the branch. It is difficult to set it on, and the disadvantage that when the handle is moved up and down during sawing, the handle bends and the branches cannot be cut off efficiently, and chips are put in the eyes of workers on the ground. It had the drawback of being difficult to remove.
In particular, if a branch is cut off without being able to set the saw at the root of the branch, a part of the branch remains on the trunk as described above, resulting in a fatal defect.

In addition, a method of cutting off a branch from the ground with a branch cutting scissor having a fixed blade and a movable blade having a long handle of about 6 meters was also partially performed. However, the branch cutting scissors consisting of a fixed blade and a movable blade have directionality, and when the movable blade is located on the side of the tree trunk, the branches can be cut off neatly from the root, but in the opposite direction, There was a fatal drawback that a part of the branch with a length corresponding to the thickness of the fixed blade remained on the trunk and became a dead node. This method does not allow the movable blade to always be located on the trunk side of trees in forests where cliffs and steep slopes are scattered, it is flat, and workers can freely change their body positions. It has the drawback that it can only be applied to the very limited places possible. In addition, it is a work that requires heavy use of the arm, palm, and finger muscles, which is a drawback for older people.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to solve the drawbacks described in the prior art, and it is easy for beginners and the elderly, regardless of their skill, from the ground.
The purpose of the present invention is to provide a pruning device that can surely prun.

[0006]

[Means for Solving the Problems] A handle having an expandable joint is attached to a bundle of a knife body having two blades, and a handle fixed at two points at appropriate intervals is attached to a lower end of the handle. , In the handle portion between the two points, with a length equal to or less than the interval between the two points,
Attach a pipe-shaped weight that can move up and down. The blade on the back should be almost flat.

[0007]

[Function] First, expand and contract the joints of the handle to adjust the length of the handle,
Then, apply a nearly flat blade on the back to the lower root of the branch to be shot down, push up from the bottom, cut the bark, then hang the abdominal blade on the upper root of the branch, lightly support the handle,
Pull the pipe-shaped weight up, then drop it down,
By applying a downward impact force to the handle and causing the blade of the abdomen to bite into the branches one by one, the branches can be reliably knocked down without leaving the bark on the lower side.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings showing an embodiment of the present invention, a knuckle portion 5 which is expandable and contractible is attached to a bundle portion 4 of a tool body 3 having a blade 1 which is substantially flat on the back and a blade 2 on the abdomen. A handle 6 made of iron, aluminum, stainless steel pipe or the like having a handle is attached, a handle 7 fixed at two points is provided at the lower end of the handle 6 at an appropriate interval L, and a handle portion between the two points is provided. A vertically-movable pipe-shaped weight 8 is mounted with a length A that is equal to or less than the distance between the two points. The pipe-shaped weight 8 is not fixed, and can be replaced depending on the thickness of the branches and the physical strength of the operator. Reference numeral 9 is a money receiver, which is used to uniformly apply the impact force of the pipe-shaped weight 8 to the handle 6. 10 is a screw for fixing the bundle portion 4 of the blade main body 3 to the handle 6. It should be noted that the upper and lower ends of the handle 7 are fixed to the handle 6 by the fixed band 1
1 is attached, and when used, the fixing band 11 is fixed with the screw 12
It is preferable that the handle 7 is attached to the handle 6 and the handle 7 is attached.

Further, in FIG. 2, reference numeral 13 is a telescopic bolt hole for adjusting the distance between the handle 6 and the handle 7. When the handle 7 is fixed by the left bolt hole, the handle 7 is at the position of the virtual dotted line, The distance increases. This is because the operator can easily perform the work regardless of the size of the pipe-shaped weight 8 and the size and condition of the operator's hand. Reference numeral 14 is a weight to be mounted on the outside of the pipe-shaped weight 8 for appropriately adjusting the weight of the pipe-shaped weight 8. The shape is a donut shape,
Various shapes such as a half-cylindrical shape can be used. Reference numeral 15 is a bearing mounted on the upper and lower ends of the pipe-shaped weight 8 for smoothing the vertical movement of the pipe-shaped weight 8. For example, when it is difficult to set the handle 6 vertically in a place where the work site is steeply inclined, the bearing 1
When the pipe-shaped weight 8 with 5 is used, the weight falls smoothly so that the work can be performed efficiently. The length of the handle 7 is not fixed, and the handle 7 can be freely replaced with a handle of a different length. Further, the interval L can be adjusted by moving the fixed band 11 vertically as appropriate.

With respect to the mechanism for making the handle 6 expandable and contractable at the joint portion 5, all well-known mechanisms currently in practical use can be applied, and the mechanism is not particularly limited. The height of pruning of cedar and cypress is about 6 meters, so that the handle 6 should have this length when fully extended. In addition, from the convenience of storage and carrying, etc.
It is preferable that the knots can be expanded and contracted with about two steps so as to be about a meter.

In order to facilitate the polishing of the blades 1 and 2, it is preferable that the blade body 3 be made detachable by fixing the bundle portion 4 to the handle 6 with screws or the like. The material of the handle 7 is not particularly limited, but a wooden rod is preferable from the standpoint of ease of gripping, etc. A shrink rubber tube or the like may be coated to prevent slipping or vibration transmitted to the hand.

The blade 1 on the back of the blade body 3 is preferably flat in order to push it up from below and cut the bark, but the blade 2 on the abdomen is thicker than the thickness of the branches to be cut off.
Blades of various shapes as shown in FIG. 3 can be used depending on the type of tree, topography, etc., and are not particularly limited.

A pruning device according to the present application was prototyped, and pruning experiments were conducted on cedar and cypress. As a result, in terms of workability,
It has been found that the distance L between the two points for fixing the handle 7 is preferably about 1.5 meters, and the length of the pipe-shaped weight 8 is preferably about 0.75 meters. Also, the tree height is about 10
As a result of pruning experiments up to about 6 meters above ground on 200 cedar trees, the blade 2 of the abdomen that digs into the branches was subjected to repeated impact force applied to the handle 6 by the pipe-shaped weight 8. Also, it was confirmed that the branches did not shake at all and steadily dig into the branches smoothly after each impact, and that they can be cut cleanly from the roots of the branches with a flat cut.

[0014]

[Effect] Since the present invention is configured as described above,
It has the following effects.

Since it is possible to work from the ground, it is safe.

Since the work is a light work requiring no skill, being easy to handle, and requiring no muscle strength, even a beginner or an elderly person can perform the work.

Since the cut end is flat and has no irregularities, and the branches can be neatly knocked down from the root, no dead node occurs.

It is possible to cut thick branches that were impossible with scissors. All branches with a thickness that matches the size of the blade on the abdomen of the blade body can be cut.

It can be used without problems even on terrain with cliffs and steep slopes.

Since the structure is simple and sturdy, there is almost no failure and it can be used with confidence. Moreover, it is convenient to store and carry. The present invention has various remarkable effects as described above, and its industrial utility value is high.

[Brief description of drawings]

FIG. 1 is a partially cutaway side view showing an embodiment of the present invention.

FIG. 2 is a partially cutaway side view showing an example of a handle portion of the present invention.

FIG. 3 is a side view showing an embodiment of a blade body.

[Explanation of symbols]

 1 Flat blade on the back 2 Blade on the abdomen 3 Tool body 4 Bundle 5 Stretchable node 6 Handle 7 Handle 8 Vertically movable pipe weight 9 Receiving 10 Screw 11 Fixing band 12 Screw 13 Expansion bolt hole 14 Weight 15 Bearing L Distance between two points where the handle is fixed A Length of vertically movable metal pipe

Claims (1)

[Claims] 1. A handle having an expandable joint section (5) in a bundle section (4) of a tool body (3) having a substantially flat blade (1) on its back and a blade (2) on its abdomen. (6) is attached, a handle (7) fixed at two points is attached to the lower end of the handle at an appropriate interval (L), and a handle portion (7) between the two points is attached with an interval between the two points. A pruning machine having a length (A) below and a vertically movable pipe-shaped weight (8) attached thereto.