JPH025724Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a pruning machine.

The present applicant is Utility Application No. 56-140002
30930), a main machine frame 1 having a chain saw 2 and an auxiliary machine frame 4 facing it are connected by a spring 6.
A set of two mutually parallel drive wheels 3 driven by a prime mover 16 are provided on the main engine frame 1 so as to be diagonal to the vertical direction of the tree trunk 15, and a straight lowering roller 9 is provided at the tip. A ram 13 with a string 17 provided at the rear is pivoted so that its wheels 9 can approach and separate from the tree trunk 15, and a reel R around which the string 17 is wound is attached via a drop device. proposed a pruning machine in which the auxiliary machine frame 4 is provided with a plurality of free wheels 5.

However, in this pruning machine, the main machine frame and the auxiliary machine frame are provided with guide rods on both sides of the main machine frame, one end of this guide rod is inserted into a guide ring provided on the auxiliary machine frame, and both machine frames are held together by a spring. It is integrated.

As is well known, this pruning machine moves up or down directly around the tree trunk.
If there are irregularities on the surface of the tree trunk during this ascent or descent, the relative positions of the two machine frames are twisted, making it difficult to ascend or descend smoothly.

Further, in some cases, the chain saw may damage the bark, or the lower surface of the branch may be cut in half, resulting in an accident where the chain saw stops clamping.

The present invention eliminates the above drawbacks by simple means.

Next, one embodiment of the present invention will be described with reference to the drawings.

As mentioned above, the main structure of the pruning machine is that the main machine frame 1 having the chain saw 2 and the auxiliary machine frame 4 facing it are connected by a spring 6, and the main machine frame 1 is connected to the main machine frame 1.
A set of two mutually parallel drive wheels 3 driven by a prime mover 16 are provided obliquely with respect to the vertical direction of the tree trunk 15, and a straight descending wheel 9 is provided at the tip, and a string 17 is provided at the rear. The ram 13 is pivoted so that its wheels 9 can approach and separate from the tree trunk 15, and the reel R around which the string 17 is wound is attached via a drop device, while the auxiliary machine frame 4 has a plurality of A free wheel 5 is provided.

Lateral guide rods 7, 7 are integrally fixed at right angles on both sides of the main engine frame 1, while a lateral guide tube 8, through which the lateral guide rods 7 are inserted, is provided in the auxiliary engine frame 4. is provided. The outer diameter of the lateral guide rod 7 is smaller than the inner diameter of the lateral guide cylinder 8, and has a slight play.

The free wheel 5 is connected to the auxiliary machine frame 4 as shown in FIG.
is pivoted to a bearing 11 by a support shaft 10, and the support shaft 10
The direction of the fork 12 can be freely changed by the free movement of the support shaft 10, forming a so-called caster.

The direct-lowering roller 9 is freely supported at the tip of a lever 13 that is pivoted slightly below the middle of the upper and lower drive wheels 3, 3 of the main engine frame 1, and under the force of a spring 14, it is supported by the solid line in FIG. It is held in position and spaced apart from the tree trunk 15.

In addition, in the embodiment, the direct descending roller 9 has two
The other roller 9a is provided at the tip of a lever 13a that is pivotally supported on the main engine frame 1, and the two rollers 9, 9a are connected by a link 13b. Additionally, 18 is an interlocking device for the upper and lower drive wheels 3,3.

Further, the string 17 is wound around a reel R, and this reel R is connected to the main engine frame 1 through a dropping device (not shown).
It is attached so that it will fall off at the same time as the prime mover 16 stops in response to a radio signal as described below.

Chain guide plate 2a that guides the chain saw 2
A horizontal arm 28 is attached to the rear of the upper end.
At the lower end of this side arm 28, an arm 20 is swingable by a support shaft 28a.

Note that the horizontal arm 28 is provided with a long groove 22,
The bolt/nut 23 provided on the arm 20 is inserted into the long groove 2.
2 and restricts the range of swing of the arm 20.

At the tip of the arm 20, a branch guide fan-shaped plate 21 is provided with a shaft 24a so that the upper guide surface a is located above the upper edge of the sector-shaped upper edge of the chain saw 2, and a branch guide fan-shaped plate 21 is provided at the tip of the arm 20. 2
4 is swingably attached to the shaft 24a, and a tension spring 27 is provided at the rear end of the horizontal arm 28 and the ram 24, and a protrusion 30 provided on the arm 20 is attached to the rear end of the ram 24. An adjustable stopper 29 for regulating the position of the lever 24 is provided. Further, a chain saw guide guide 26 is provided on the shaft portion of the guide roller 25 and projects from the chain saw 2 toward the auxiliary machine frame 4 side.

Since the pruning machine has the above configuration, the tree trunk 1
Place the machine frames 1 and 4 on both sides of the spring 6
The upper and lower driving wheels 3, 3 and the driven wheels 5 are pulled by
is pressed against the tree trunk 15 and the prime mover 16 is started.
Due to the rotation of the drive wheels 3, 3, both machine frames 1, 4 turn around the tree trunk 15 and rise. At this time, the bifurcated portion 12 of the driven wheel 5 is oriented in a direction opposite to the upward turning direction, and the driven wheel 5 moves freely or follows the upward turning direction. The branch 19 is then cut using a chain saw 2.

By the way, when the branch 19 comes into contact with the roller 25 while the branching machine is turning and rising, the roller 25 will move against the branch 1.
Move above or below 9.

That is, when the roller 25 comes into contact with the upper part of the branch 19, the driving force of the prime mover 16 causes the roller 25 to move against the branch 19.
reach the top, that is, push up the entire pruning machine, and
As shown by the solid line in the figure, the cutting range of the chain saw 2 is entered, and the branch 19 is completely cut off. Conversely, when the roller 25 contacts the lower part of the branch 19, the branch guide fan plate 21 swings together with the lever 24 as shown by the imaginary line in FIG. The chain saw 2 slides while being guided above the branch 19, and the branching machine descends slightly due to the reaction force, and the chain saw 2 passes below the branch 19 without touching the branch 19. Note that due to the existence of the chain saw guide 26, a predetermined distance is always formed between the tree trunk 15 and the chain saw 2, so that the bark of the tree trunk 15 is not damaged by the chain saw 2.

In this manner, when the pruning machine reaches a predetermined altitude, the prime mover 16 is stopped by a radio signal from the ground, and the reel R is dropped. Therefore, when the string 17 is pulled downward, the lever 13 moves to the second position.
The pruning machine rotates from the solid line position to the imaginary line position in the figure, and the straight-lowering wheels 9 press against the tree trunk 15, and the drive wheels 3, 3 are separated from the tree trunk 15, and the pruning machine uses its own weight to connect the driven wheels 5 and straight-lowering wheels 9 to the imaginary line position. It descends to the ground while holding the tree trunk 15 with the wheels 9. At that time, the driven wheel 5 is bifurcated.
2 automatically rotates from the solid line position in FIG. 2 to the imaginary line position, and the driven wheel 5 is directed vertically and lowered. During the above-mentioned turning upward and straight downward movement, the springs 6
However, the lateral guide rod 7 and the lateral guide cylinder 8 mutually swing approximately on a common center line, and the mutual positions of both machine frames 1 and 4 are maintained.

Since the present invention is configured as described above, the guide roller 25 and the branch guide fan-shaped plate 21 can smoothly move branches that are difficult to cut with a chainsaw to the cutting position or avoid the above-mentioned branches. It is raised and the board is cut during the subsequent raising process. Moreover,
Because the chain saw 2 does not come into direct contact with the tree trunk 15 due to the presence of the chain saw guide 26, the chain saw 2 does not touch the tree trunk 15 directly.
Do not cause unnecessary damage to the product. In addition, even when the machine frames 1 and 4 move closer to each other due to the traction force of the spring 6 due to changes in the diameter of the tree trunk 15 or surface irregularities when turning upward or downward, the lateral guide rod 7 remains inside the lateral guide cylinder 8. slides precisely along the
Malfunctions due to twisting of both machine frames 1 and 4 will not occur.

[Brief explanation of the drawing]

Figure 1 is a front view of the proposed pruning machine, Figure 2 is a side view of Figure 1 seen from the left, Figure 3 is an enlarged view of the upper part of the chain saw, and Figure 4 is a plan view of Figure 3. It is a diagram. 1...Main engine frame, 2...Chain saw, 2a...Chain guide plate, 3...Drive wheel, 4...Auxiliary machine frame,
5... Driven wheel, 6... Spring, 7... Lateral guide rod, 8... Lateral guide tube, a... Fan-shaped guide surface, 9
...Rolling wheel for direct descent, 20...Arm, 21...Branch guide fan-shaped plate, 22...Long groove, 23...Bolt/nut, 24...Role, 25...Guide roller, 26
...Chain saw guide, 27...Spring, 28...Side arm, 29...Stopper, 30...
protrusion.

Claims (1)

[Claims for Utility Model Registration] A main machine frame 1 having a chain saw 2 and an auxiliary machine frame 4 facing it are connected by a spring 6, and a set of two mutually parallel drives driven by a prime mover 16 is attached to the main machine frame 1. The wheels 3 are provided obliquely with respect to the vertical direction of the tree trunk 15, and a rolling wheel 9 for direct descent is provided at the tip.
A ramrod 13 with a string 17 provided at the rear is pivoted so that its wheels 9 can approach and separate from the tree trunk 15, and a reel R around which the string 17 is wound is attached via a drop device. On the other hand, in a pruning machine in which the auxiliary machine frame 4 is provided with a plurality of free wheels 5, a horizontal arm 28 provided on the chain guide plate 2a of the chain saw 2 is provided so as to rotate within a predetermined angle. A branch guide fan-shaped plate 21 is provided at the tip of the arm 20 so that the upper guide surface a is located above the sector-shaped upper edge of the chain saw 2, and a guide roller 2 is provided at the tip of the arm 20.
5 is swingably attached, and a tension spring 27 is provided at the rear end of the lateral arm 28 and the ram 24, and the arm 2 is attached to the rear end of the ram 24.
An adjustable stopper 29 is provided for regulating the position of the ram 24 with a protrusion 30 provided at 0, and a chain saw guide guide 26 that protrudes from the chain saw 2 toward the auxiliary machine frame 4 is provided at the shaft portion of the guide roller 25. On the other hand, there are horizontal guide rods 7 on both sides of the main engine frame 1.
, and the auxiliary machine frame 4 is provided with a horizontal guide tube 8 through which the horizontal guide rod 7 is slidably inserted.