JPH0965774A - Riser for pruning machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a riser for a pruning machine reduced in size, and designed to extend the limit of the diameter of trees to be pruned and make its climbing/ descending time shorter when being in no operation. SOLUTION: The objective riser comprises (1) a machine driving unit, (2) a wire driving unit, (3) a wire tension adjuster unit, (4) a wire connecting unit, and (5) a wire having spiral surface structure.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ascending / descending device for a forestry machine.

[0002]

2. Description of the Related Art In the prior art relating to an ascending / descending device used in an automatic pruning machine for spirally climbing a tree in a forestry machine to perform pruning work, the conventional technique relates to a main body having drive wheels and an auxiliary device. The auxiliary frame with wheels was attached to the tree by using the tension of the spring to pinch and pull the tree. In addition, the driving wheels and auxiliary wheels were set at a certain angle in a diagonal manner in order for the automatic pruning machine to raise the tree spirally for pruning work.

[0003]

Due to the structure having the auxiliary frame, the automatic pruning machine becomes large, and a dedicated backpack is used to transport the automatic pruning machine in a steep mountain forest. There was a large physical burden and danger to the workers, such as unstable movement by the group. Since the spring was used to attach the automatic pruning machine to the tree, the pruning process was limited to the range of expansion and contraction of the spring, and it could not be used for trees with large diameters. Since the drive wheels and auxiliary wheels are set at a fixed angle so as to rise spirally with respect to the tree for pruning work, the work time was wasted due to spiral rise and fall even without branches. .

[0004]

In order to solve the above drawbacks, the present invention uses a wire (hereinafter referred to as a wire) having a spiral structure on its surface, which is passed through a wire tension adjusting portion at one end of a main body of an ascending / descending device. It is attached to the tree by connecting it to the trunk of the tree and connecting it to the wire connection at the other end of the main body so that it rises and falls vertically in the absence of branches and spirally rises at the place of pruning. The drive unit has a structure that incorporates drive wheel angle adjusting means.

[0005]

The function of the auxiliary pruning machine, which was a component of the automatic pruning machine, is eliminated, and the size of the entire machine can be reduced. The diameter of the tree that can be pruned can be increased by the length of the wire, because the wire is attached to the tree by adjusting the tension. By changing the drive wheel of the main body drive unit from the spiral angle to the vertical angle, it is possible to vertically ascend and descend where there is no branch.

[0006]

EXAMPLE An example in which the present name is adopted in an automatic pruning machine will be described. The wire tension adjusting part (3) is a guide shaft (8).
Spring (9) to allow sliding along a, 8b)
floating part (10) and wire, support roller (11a, 11b, 11c, 11d) connected by a, 9b)
It consists of. The wire tension adjusting part (3) and the wire connecting part (4) are rotatably supported by the pruning machine main body, and the operation of the wire driving part (2) equipped with the forward and reverse evacuation means is transmitted to each transmission mechanism ( The wire tension adjusting part (3) and the wire connecting part (4) are rotationally driven via a not-shown) to adjust the tension of the wire (5) and simultaneously rotate the wire (5) integrally. To explain the operation of the wire tension adjusting part (3), the tension applied to the wire (5) is determined by the spring (9).
sensor (13) of the floating part (10) via a, 9b)
The controller (14) controls the rotation of the motor (15) in response to the signal detected by the wire feed roller (1) via the worm (16) and the worm gear (17).
The wire (5) necessary for transmitting the driving force of the main body to the trees by adjusting the tension applied to the springs (9a, 9b) within a certain range by driving the wire (5) to wind and feed the wire (5). Adjust the tension of. Explaining the ascending / descending operation of the main body, when the automatic pruning machine vertically rises in the absence of branches, the drive wheels (6a, 6) of the main body drive unit (1) incorporating the forward / reverse drive means and the drive wheel angle adjusting means.
b, 6c, 6d,) vertically move up and down to drive the main body up. Since the diameter of the tree changes depending on the position of the trunk, the wire tension adjusting unit (3) adjusts the tension on the wire (5) within a certain range in order to transmit the driving force of the main body to the tree. At the same time, the wire (5) is rotationally driven by the operation of the wire drive (2) set to the same speed as the main body drive (1), and the tree is raised as the main body is raised. In the case of vertically descending, the operation of the main body drive unit (1) and the wire drive unit (2) is switched to the lowering operation. The body is a chain saw (7)
When the tree is to be spirally lifted for pruning work by means of the drive wheels (6a, 6b, 6c, 6) of the main body drive unit (1).
d,) has an oblique set angle by the drive wheel angle adjusting means. Since the drive speed of the wire (5) is set to be equal to that of the main body drive unit (1), the speed at which the wire (5) vertically raises the tree is the drive wheel (6a, 6a) of the main body drive unit (1).
b, 6c, 6d) is faster than the apparent vertical ascending speed when the tree is spirally rotated while rising, and the speed difference wire (5) idles at the contact surface with the trunk (21). Since the surface of) has a spiral structure, the wire (5) has a force to move to the right when viewed from above the tree at the portion in contact with the trunk (21). This is an auxiliary operation for the automatic pruning machine to perform the spiral ascent. The surface of the wire (5) conformed to the Z twist of the Japanese Industrial Standard because the spiral rising direction was clockwise when viewed from above. Wire (5)
Support roller (11a, 11b, 11) for supporting the wire tension adjusting part (3) so as to pass through the center thereof.
c, 11d, 12) and wire feed roller (18)
Uses flat rollers to support three or more points in each place, or installs one roller with a depressed center at each position with a wire (5) sandwiched between them, or combining them. However, in order to reduce the number of parts, a roller having a depressed center was adopted, and wire supporting rollers (11a, 11b, 11c, 11d) were arranged at both ends of the wire tension adjusting part (3). Floating part (1
Electricity for the motor (15) in (0) is taken into the electrode (16) of the wire tension adjusting part (3) via the brush (17).

[0007]

When the present invention is used as an ascending / descending device of an automatic pruning machine, the auxiliary frame is eliminated, and the entire machine can be made smaller than before. It leads to reduction. Since the diameter of the tree that can be attached can be expanded by the length of the wire, the width of the target of pruning can be expanded and it can be used for trees with a large diameter. Since there is no branch, it can move up and down vertically, thus eliminating waste of time and improving work efficiency.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a forestry machine equipped with an ascending / descending device mounted on a tree as seen from above.

FIG. 2 is a perspective view of a tree where an automatic pruning machine equipped with a raising and lowering device for a forestry machine is attached to a tree.

FIG. 3 is a cross-sectional view of a wire tension adjusting unit.

[Explanation of symbols]

(1) Main body drive part (2) Wire drive part (3) Wire tension adjustment part (4) Wire connection part (5) Wire (6a, 6b, 6c, 6d,) Drive wheel (7) Chain saw (8a, 8b) Guide shaft (9a, 9b) Spring
(10) Floating part (11a, 11b, 11c, 11d, 12) Wire support roller (13) Sensor (14) Controller (15) Motor (16) Worm (17) Worm gear (18) Wire feed roller (19) Electrode ( 20) Brush (21) Stem

Claims (1)

[Claims] Claim: What is claimed is: 1. A main body drive section, a wire drive section, a wire tension adjusting section, a wire connecting section, a wire having a spiral surface, and an ascending / descending device for a forestry machine configured as described above.