JPH0349528B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a pruning method and a pruning machine. It is designed to shift to a low speed.

(Background of the Invention) A pruning machine consists of a main body equipped with lifting wheels and a cutting part loaded on the main body, and uses a power part to drive the lifting wheels to move up and down trees. , the cutting part is adapted to cut the branches. Such pruning work is performed from the lower part of the tree T using a pruning machine P, as shown in Fig. 9a, and when pruning has already been done up to a certain height H, as shown in Fig. 9b. In some cases, this is performed only for portions h having a height H or more. By the way, in the above-mentioned pruning work in which the pruning machine is carried out while raising the tree, the pruning machine slowly ascends the tree at a low speed so that the cutting part can reliably cut the branch. However, if the pruning machine raises the tree at a low speed in this way, when performing the pruning work shown in Figure 9b, it will take unnecessary time for the pruning machine to reach the height H at which it starts pruning work. This makes the pruning work difficult and the efficiency of the pruning work cannot be improved.

(Summary of the Invention) The present invention has been made in view of the above circumstances, and as shown in Fig. 9b, the present invention provides a method for pruning which is advantageous for performing pruning work only on the part above the height of a standing tree. The purpose of this invention is to provide a pruning method and a pruning machine. To this end, the present invention provides a branch detection section that detects branches that hit the cutting section, and a transmission section that changes speed from high speed to low speed in conjunction with the branch detection section, and moves from the bottom of the tree to the top of the tree. The branching machine is raised at high speed, and when a branch hits the cutting part of the branching machine for the first time, this is detected by the branch detection section and the transmission section is operated to increase the raising speed of the branching machine. The pruning machine is decelerated from a high speed to a low speed, and then the pruning machine slowly raises the tree while pruning the tree.

(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of the pruning machine in an exploded state, and the pruning machine L has a main body part M for lifting and lowering that is detachably set on a tree, and a main body part M that is detachably attached to the main body part M. It consists of a rotating part N. The main body M is
It is equipped with a large number of lifting wheels w that rotate along the height direction of the tree, and when each wheel w is rotated by an engine 41 as a power unit loaded on the rotating part N, the main body M moves along the tree. Rise vertically. The rotating part N is detachably attached to the main body M, and rotates around the main body M when the main body M vertically ascends the tree. Cut branches that protrude from the surface of the tree from their roots. Reference numeral 44 is a cover plate which is detachably mounted on the rotating part N, and is cut by the cutting part 43 when the main branch cutting machine L cuts branches while climbing the tree. This prevents branches falling to the ground from falling into the rotating part N and the main body part M and causing these failures.

The main branching machine L uses each wheel w of the main body M and the cutting part 43 of the rotating part N by an engine 41 on the side of the rotating part N.
The machine slowly moves vertically up the tree to cut branches, and when the predetermined cutting operation is completed, it descends vertically along the tree. 8
1 is a gasoline tank, 82 is a rising height setting section, 8
3 is a case in which gears etc. are stored, 84 is an oil tank, and 85 is a cutting part 43 that controls the rotation of the engine 41.
A timing belt 86 for transmitting the signal to the main shaft is provided.

Figure 2 shows the main body M set on a standing tree T,
It is a perspective view of a state in which it is removed from a standing tree T,
The main body M includes annular frames F1, F2, F
3 as the main frame, and various parts described below are attached to each frame F1 to F3.
G1 is a large floating gear disposed at the top of the main body M, and teeth are formed on its outer and inner circumferential surfaces.When the pruning machine L moves up the tree T, the engine 41 arrow X with the tree T as the center
direction and transmits forward rotation to each wheel w. Further, when the pruning machine L moves down the tree T, it rotates in the direction of arrow Y, and each wheel w rotates in the opposite direction. G2 is a fixed large gear located directly below the floating large gear G1, and has teeth formed on its outer peripheral surface.

The large gear G2, like the above large gear G1,
It does not rotate in any direction, but is fixed to the frame. When the main body part M ascends the tree T, the rotating part N cuts the branch T with the cutting part 43 while rotating along the large gear G2, and the gear G2 cuts the branch T while rotating along the large gear G2. This serves as a rotational guide orbit. G3 is located directly above frame F3, and is a standing tree T.
It is a large interlocking gear with an arc shape surrounding it. The large gear G3 has the function of pressing the three elevating wheel parts W to which the wheels w are attached by the cam 65 urged by the spring S, and pressing them against the surface of the tree T in conjunction with each other. It is something. The main body part M is a standing tree T
In the state set to , the tree T is located at the center of each frame F1 to F3 and each gear G1 to G3.

The frame F1 is composed of a main frame F1a and a sub-frame F1b, and when setting the main body M on the tree T or removing it from the tree T,
The subframe F1b is opened as shown in FIG. An opening/closing plate 45 is attached to the frames F2, F3, and when the main body M is set on or removed from the tree T, the opening/closing plate 45 opens as shown in FIG. The opening/closing plate 45 also serves as a connecting member between the frames F2 and F3, and reinforces and solidifies the frames F2 and F3 to connect the frames F2 and F3.
2. This is to prevent F3 from being twisted or deformed.

In addition, each of the large gears G1 and G2 is also connected to the main gear G1.
a, G2a and sub gears G1b, G2b, one end of the sub gears G1b, G2b is connected to the main gear G.
It is rotatably attached to one end of G2a and G2a. However, when the main body M is set on a standing tree T,
When removing it from the tree T, as shown in Fig. 2, open the sub frame F1b, opening/closing plate 45, and each sub gear G1b, G2b to ensure an opening through which the tree T can pass, and then insert the tree T through the opening. After the tree T is positioned at the center of the main body M, the subframe F1b, opening/closing plate 4, and sub gears G1b and G2b are closed as shown in FIG. 46,4
7, 48, 49, and 50 are stops.

Next, with reference to FIGS. 3 to 5, a transmission mechanism for rotating the wheels w in the normal direction, that is, in the direction of rising trees will be explained.

g7 is a gear, and the rotation of the engine 41 is transmitted through belts 51, 53, reduction gears 52, 54, and transmission section 15. 55 is its rotation axis. A gear g9 is located on the left side of the gear g7, and a gear g10 that meshes with the large fixed gear G2 is attached to the upper part of the rotating shaft 56. g11 is a gear located on the right side of gear g7, and the above-mentioned large gear G is located on the upper part of its rotating shaft 57.
A gear g12 that meshes with gear g12 is attached.
g8 is a movable gear attached to the rotating member 59, and when the main branching machine L moves up the tree T, it meshes with gear g7 and gear g9 as shown in FIG. The rotation is transmitted to gears g9 and g10. Further, when the main branching machine L moves down the tree T, it meshes with the gear g7 and the gear g11 as shown in FIG. In FIG. 3, g1 is a gear that meshes with large gear G1, and its rotation is caused by bevel gear g2,
g3, the chain 60, etc., to each wheel w of the lifting wheel section W. Reference numeral 43 denotes the cutting section, which is driven by the engine 41 via the timing belt 85.

Reference numeral 58 denotes a stopper that engages and disengages the gear g12, and when the pruning machine L moves up the tree T, the stopper 58 engages with the gear g12 and prevents rotation of the gear g12 (Fig. 4). reference). In this state,
The rotation of engine 41 is transmitted to gear g10.
When the gear g10 rotates, the rotating part N turns into the large gear G2.
However, since the gear g12 is prevented from rotating by the stopper 58, the large gear G1 that engages with the gear g12 rotates around the gear g12.
It is pulled by and rotates in the X direction. Then, the gear g1 meshing with the large gear G1 rotates, and the rotation is transmitted to the wheel w via the gears g2, g3, the chain 60, etc., the wheel w rotates forward, and the pruning machine L moves up the tree T. At this time, the branch t protruding from the tree T is cut by the cutting part 43 of the rotating part N rotating around the large gear G2. The pruning machine L rises height setting section 82
When the height set by is reached, the stopper 58 separates from the gear g12 (see FIG. 5), and the gear g12 becomes free. Then, the pruning machine L moves down the tree T due to its own weight. At this time, the large gear G1 rotates in the direction of the arrow Y.

15 is a transmission section, and as shown in FIG. 6, a large gear 18b and a small gear 18a are connected to a spline shaft 2.
9. It is connected to the rotating shaft 55 via the sliding tube 30 so as to be slidable in the vertical direction.

FIG. 7 shows details of the cutting part 43, which is erected on a pedestal 63. 6
4 is a frame of the cutting part 43, and the upright part 64
a, and a sloped portion 64b that is connected to the upper part of the upright portion 64a and protrudes slightly upward toward the front. 42 is a saw chain which is adjusted to rollers 66, 66 and a sprocket 67 attached to a frame 64;
7 is driven by the engine 41, the saw chain 42 rotates along the rollers 66, 66. 10
is the limit switch as a branch detection unit disposed at the rear of the frame 64, and when the branch t hits the saw chain 42, the frame 64 is pushed by it and displaced backward due to its own elastic deformation, mechanical deformation, etc. Then (see the chain line), the lever 10a is turned on and the limit switch 10 is turned on.

The main branching machine L has the above-mentioned configuration, and when performing pruning work, the main branching machine L is connected to the standing tree T.
When the pruning machine L is set at the top of the tree T and the engine 41 is started, the wheels W rotate in the normal direction and the pruning machine L immediately moves up the tree T. Initially, the small gear 18a meshes with the large gear 17a due to the spring force of the spring 24.
Therefore, the wheels w rotate at high speed, and the pruning machine L moves up the tree T at high speed. First branch t in cutting part 43
When the lever 10a is turned on, the limit switch 10 is turned on, the thyristor 23 is turned on, the solenoid 13 is activated, and the gear 18 is turned on.
a and 18b slide upward, and the large gear 18b meshes with the small gear 17b. Then, the rotation speed of the wheel w is reduced, and thereafter the pruning machine L slowly moves up the tree T, and the cutting section 43 rotating around the tree T cuts the branch T.

(Other Embodiments) In the above embodiment, the lever 10a of the limit switch 10 is closed by elastic deformation or mechanical deformation of the frame 64.
In order to more reliably throw in the material, the frame 64 is supported by a support spring, and when the saw chain 42 is hit by a branch t, the frame is moved backward against the spring force. good. 8th
The figure shows an example, and the frame 64
is attached to a pedestal 80 so that its lower part can freely rotate around a shaft 89. 87 is a pedestal 8 for defining the counterclockwise rotation limit of the frame 64.
This is a rib that protrudes from 0. Reference numeral 90 denotes a column erected on the upper surface of the pedestal 80, and the limit switch 10 is attached to the upper portion of the column 90. Further, a spring 88 for supporting the bullet is disposed between the support column 90 and the frame 64.

In such a configuration, when the saw chain 42 is hit by the branch t, the frame 64 is pushed by the branch t and the spring 88
The lever 10a is rotated slightly clockwise about the shaft 89 against the spring force of , and the lever 10a is closed (see the chain line). If the frame 64 is elastically supported by the spring 88 and attached to the pedestal 80 so as to be rotatable about the shaft 89 in this way, when the branch t hits the saw chain 42, the lever 10a can be inserted more reliably. I can do it.

(Effects of the Invention) As explained above, according to the present invention, the pruning machine is moved vertically up the tree at high speed until the branch hits the cutting part of the pruning machine, and the branch hits the cutting part. After being hit, the rising speed of the pruning machine is slowed down, so it can be applied very advantageously, especially when pruning is performed only on areas above the height of a standing tree. This has the effect of greatly improving the efficiency of pruning work.

[Brief explanation of drawings]

The figure shows an embodiment of the present invention.
Figure 2 and Figure 2 are perspective views of the pruning machine, Figure 3 is a partial perspective view of the transmission system, Figures 4 and 5 are exploded views of the transmission system, Figure 6 is a partial side view, and Figure 7 is a partial perspective view of the pruning machine. FIG. 8 is a side view of the cutting part, FIG. 8 is a side view of another embodiment, and FIGS. 9a and 9b are side views during pruning work. 10... branch detection section, 15... transmission section, 41...
Engine as a power section, 43...cutting section, L...
…Pruning machine, M…Main body, w…Elevating wheels, G
2...Rotation guide orbit.

Claims (1)

[Scope of Claims] 1. A main body equipped with lifting wheels that vertically move up and down along a tree, and a vehicle that is loaded on the main body and moves around the tree along a rotation guide track provided on the main body. In a pruning method in which a branch consisting of a rotating cutting section is used to raise the tree by driving a power section and cut a branch of the tree, when a branch that hits the cutting section is detected by the branch detection section, Activating the transmission section disposed on the transmission path to the lifting wheel,
A pruning method in which the rotation speed of the lifting wheel is changed from high speed to low speed. 2. A main body equipped with lifting wheels that vertically moves up and down along a tree, and a cutting section that is loaded on the main body and rotates around the tree along a rotation guide track provided on the main body. A branching machine is provided in which the lifting wheel and the cutting section are driven by a power section, further comprising a branch detection section for detecting a branch that hits the cutting section, and a branch detecting section for detecting a branch hitting the cutting section, and a branch detecting section that detects a branch hitting the cutting section, and A branching machine, wherein a transmission path is provided with a transmission section, the branch detection section is connected to the transmission section, and the transmission section is operated from a high speed to a low speed based on branch detection by the branch detection section.