JPS623720A - Apparatus for cutting tree - 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] Purpose of the Invention (Field of Industrial Application) This invention is applicable only to the work of cutting off the head of standing trees and pruning, which is a problem that occurs near power transmission lines, distribution lines, communication lines, etc. The present invention also relates to a tree cutting device that is used for head-cutting, pruning, felling, etc. of general forest trees, street trees, garden trees, etc.

(Prior Art) Conventionally, cutting operations such as cutting off the head of a standing tree and pruning have been carried out by a worker climbing a stepladder or ladder placed against the tree to be cut, and using a machete or a saw.

If the tree to be cut was tall, the worker would use a stepladder or ladder to reach the top of the tree to carry out the cutting work.

(Problems to be Solved by the Invention) However, if the ground is uneven or soft, there is a problem in that the stepladder or ladder becomes unstable or, in extreme cases, becomes unusable.

Stepladders and ladders can be used if the ground is flat and firm, but if the trees are tall, stepladders cannot reach them, so there is a limit to the height of the target tree.

Therefore, as mentioned above, in the case of tall trees, workers have to climb the unstable treetops to perform the cutting work, but because the work is done at a height and the footing is extremely poor, the work does not proceed smoothly and there is a risk of falling. There was a problem.

The present invention has been made in view of the problems that exist in the conventional tree cutting techniques described above, and it is an object of the present invention to provide a device that enables tree cutting to be carried out safely from the ground.

(Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides shearing scissors at the tip of the support rod and an actuating member for performing the shearing operation, and at the base end of the support rod. The tree cutting device was constructed by providing a drive member on the side for driving the operating member.

(Function) The lower part of the support rod is supported by a worker on the ground, and the tip is positioned near the cutting point of a tree head, branch, trunk, etc. The shearing scissors I heard were pressed against the same cutting point. The driving member drives the actuating member to effect the shearing action of the shears. Therefore, the above is off! lj′iv!
J location is cut by shearing action.

<Embodiment> An embodiment of a tree cutting device embodying the present invention will be described below with reference to the drawings.

Reference numeral 1 refers to the entire support rod, which is composed of a plurality of support vibes 2 formed in a cylindrical shape from glass fiber reinforced plastic (GFRP) and connected by a metal connector 3. . Reference numeral 4 denotes a mounting rod r attached to the tip of the support rod 1, which is bent or curved in the middle so that the axial center force of the support rod 1 is shifted. Reference numeral 5 denotes a support arm rotatably attached to the tip of the mounting rod 4, which is bent at a right angle in the middle, and a posture control member 6 with a hook hole is attached to the bent part. has been done.

7 is a shearing scissor pivotally attached to the tip of the support arm 5,
It is composed of two scissors pieces 8. Reference numeral 9 is a hyperbolic blade formed on the scissor piece 8, which surrounds the tree to prevent it from escaping while cutting. Reference numeral 10 denotes a hydraulic cylinder including a shearing scissors operating member whose both ends are rotatably attached to both handles of the shearing scissors 7, and the cylinder flange is provided with a hook hole for posture i1i control. A member 11 is attached. 12
13 is a high pressure hose for shearing work connected to the rond side of the hydraulic cylinder 10, and 13 is a high pressure hose for returning the shear scissors connected to the base end side of the hydraulic cylinder 10.

14 is a switching valve connected to the tips of both high pressure hoses 12.13 and located at the bottom of the support rod 1, so that the oil flow direction can be switched to either of the high pressure hoses 12.13. . A pressure control valve 15 is connected to the switching valve 14, and a high pressure pump 17 as a driving member of the hydraulic cylinder 10 is connected to the pressure control valve 15 via a discharge high pressure hose 16. 18 is a high pressure pump 17
An oil tank connected to the suction side of the oil tank 1
8 and the return port of the switching valve 14 are connected by an oil return hose 19. , 20 is a manual handle attached to the rotating shaft of the high-pressure pump 17, and can be manually rotated by an operator.

Reference numerals 21 and 22 shown in FIG. 2.3 are attitude adjustment lines respectively latched to the hook holes of the attitude control member 6 and 11,
When the operator pulls the support arm 5, the support arm 5 rotates with respect to the mounting rod 4, so that the attitude of the shearing scissors 7 can be changed as desired.

Incidentally, a tripod (not shown) to be placed on the ground is attached to the lower end of the support rod 1.

The method of use and effects of the tree cutting device configured as described above will be explained.

First, a worker on the ground supports the lower part of the support rod 1.

When the lever of the switching valve 14 is pulled toward the user, a hydraulic circuit is opened to the side of the high-pressure boss 12 for shearing work.

The tip of the support rod 1 is positioned near the cutting point of the tree head, branch, trunk, etc., and the pruning shears 7 are pressed against the cutting point. At this point, by appropriately pulling the attitude control lines 21 and 22 as shown in FIG.
Regardless of the inclination of the support rod 1, the angle of the cutting scissors 7 relative to the cutting location of the tree can be adjusted to approximately a right angle.

Next, when the high-pressure pump 17 is rotated with the manual handle 20, the oil in the oil tank 18 is sucked into the high-pressure pump 17, and then the discharge high-pressure hose 16, the pressure control valve 15, the switching valve 14
Pressurized oil was supplied to the hydraulic cylinder 10 via the high-pressure hose 12 for shearing work, and the cylinder 10 was in the state shown in FIG.
is contracted as shown in FIG. Therefore, since the shears 1 cross each other, the trunk and branches of the tree are cut by shearing.

At this time, due to the action of the hyperbolic blade 9 described above, the tree is reliably cut without escaping.

As a result of actually carrying out this head-cutting work using scissors support rods 1 with lengths of 4 m and 8 m with the head-stops at the corresponding heights, it was found that a standing cedar wood with a wood end of 60 m/m weighed 735 kgt' and a wood end of 5 m/m.
Qm/m 510kgf, one narrate wood mouth 60
1840 kof for m/m.

It was possible to cut each with a force of 830 kgr with the wood end < om/m.

After the above-mentioned cutting, the switching valve 14 is switched by a lever to open the hydraulic circuit on the side of the high-pressure boss 13 for returning the shears, and the high-pressure pump 17 is driven to move the shearing shears 7 (J only).

According to the embodiment described in detail above, the work noise can be heard even when you are on the ground, and only work at high places such as cutting off the head of standing trees and pruning trees that grow as obstacles near power transmission lines, distribution lines, communication lines, etc. In addition, it is possible to perform head-cutting work, pruning work, felling work, etc. of general forest trees, street trees, garden trees, etc. Therefore, the above-mentioned conventional problems such as the problem of the ground on which to set up stepladders and ladders, and the risk of falling when workers climb stepladders, ladders, or tall trees are solved all at once, and This allows for extremely safe work that is not affected by any interference.

Moreover, the cutting operation can be easily and quickly performed by positioning the shearing scissors 7 at the cutting location and driving the high-pressure pump 70, so that the working efficiency can be significantly improved.

Furthermore, in this embodiment, (1) the support rod 1 is a supplementary type for the support vibrator 2, so the length can be adjusted arbitrarily; the support pipe 2 is a G F
Since it is made of RP, it is strong and lightweight; (2) the hyperbolic blade 9 has a supplementary effect on trees; (3) the attitude control members 6, 11 and attitude adjustment lines 21 and 22 control the angle of the shearing shears 7 with respect to the tree; It also has the effect of being able to adjust the

It should be noted that the present invention is not limited to the configuration of the above-mentioned embodiments, and can be modified and embodied as desired without departing from the spirit of the invention, for example, as follows.

(1) ^L [The pump 17 should be provided with an electric motor, a prime mover such as a generator, etc., for driving the pump 17. This makes operation easier and more efficient.

(2) Changing the shape of the shearing scissors 7. In particular, a lightweight shape is preferred.

(3) The actuating member of the shearing scissors 7 and its driving member are not limited to the hydraulic cylinder 10 and the high-pressure pump 17, for example, an electromagnetic solenoid and a power source may be used, and a speed reduction mechanism may also be used in combination.

Effects of the Invention As detailed above, the present invention is applicable not only to the work at heights, such as cutting off the heads of standing trees and pruning that pose a hindrance to water growing near power transmission lines, distribution lines, communication lines, etc. Head cutting work, pruning work, etc. of general forest trees, street trees, garden trees, etc.
This has the excellent effect of allowing felling work to be carried out extremely safely and efficiently while on the ground, regardless of the location of the work.

[Brief explanation of drawings]

Each figure shows an embodiment of the tree cutting device embodying the present invention, in which Figure 1 is a rear view showing the state before shearing work begins, Figure 2 is a side view, and Figure 3 is the angle of the shears. FIG. 4 is a partial front view of the same, and FIG. 5 is a partial front view of the state after the shearing operation is completed. Support rod 1, shearing scissors 7, hydraulic cylinder 10. High pressure hose 12 for shearing work, high pressure hose 13 for returning shears, cutting,
Switching valve 14, pressure control valve 15, high pressure pump 17, manual handle 20° Patent applicant: Chubu Electric Power Co., Ltd. Utah Power Consultant Co., Ltd.

Claims (1)

[Claims] 1. Shearing scissors (7) and an actuating member (10) for performing the shearing operation are provided at the tip of the support rod (1), and a shearing member (10) is provided at the proximal end of the support rod (1). A tree cutting device characterized in that it is provided with a drive member (17) for driving the actuating member (10). 2. The operating member (10) is a hydraulic cylinder, the drive mechanism (17) is a high pressure pump, and both are connected by a high pressure hose (1
2, 13, and 16). The tree cutting device according to claim 1, wherein the tree cutting device is connected at points 2, 13, and 16). 3. Hydraulic cylinder (
A pair of high pressure hoses (12, 1
3), and a switching valve (14) that can switch the oil flow direction is provided at the tip of both high pressure hoses (12, 13),
The tree cutting device according to claim 2, characterized in that a high pressure pump (17) is connected to the switching valve (14) through another high pressure hose (16). 4. The tree cutting device according to claim 3, characterized in that a pressure control device (15) is interposed between the switching valve (14) and the high-pressure pump (17). 5. The tree cutting device according to claim 4, wherein the pressure control device (15) is a pressure control valve. 6. The tree cutting device according to claim 2, wherein the scissors (8) of the shearing shears (7) are provided with a hyperbolic blade (9). 7. The tree cutting device according to claim 2, characterized in that the high-pressure pump (17) is equipped with a manual handle (20) for driving the high-pressure pump (17). 8. The tree cutting device according to claim 2, wherein the high-pressure pump (17) is equipped with a prime mover such as an electric motor or a motor for driving the high-pressure pump (17). 9. The tree cutting device according to claim 2, wherein the support rod 1 is formed by connecting support pipes (2) made of GFRP with a connector (3). 10, shearing scissors (7) are posture control means (6, 11, 21,
22) The tree cutting device according to claim 2, characterized in that the tree cutting device has: