JPS5851823A - Pull-down mechanism of pruning machine - 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] The auxiliary machine frame faces each other, and the main machine frame has four mutually parallel drive running wheels, which are diagonally crossed in the vertical direction, and the auxiliary machine frame has a plurality of A pruning machine is provided with a driven wheel and both machine frames are connected by a spring, and the main machine frame is provided with a rolling wheel that can be moved forward and backward toward the auxiliary machine frame, and a forward and backward movement control device for the same driven wheel is provided, and the driven wheel is This invention relates to a pull-down mechanism characterized by a free wheel.

To explain the embodiment of the present invention shown in the drawings, a chain saw 1 is provided on the upper part of the main machine frame 2 so as to protrude upward, and consists of an auxiliary machine frame 3 facing the main machine frame 2, and the main machine frame 2 has upper and lower parts. A total of 4 mutually parallel drive running @ 4 with 2 each
1, and the running wheels 4 are provided obliquely with respect to the vertical direction as shown in FIG. The auxiliary machine frame 3 is provided with a total of 6 driven wheels, 3 each at the upper and lower parts (2 driven wheels may be 4 in total), and both machine frames 2 and 3 are connected by the spring 5, so that the pruning machine can be formed.

In the present invention, rolling wheels 8, 8 are pivotally supported at the lower end of an inclined stacking rod 7 which is pivotally supported 6 to the main engine frame 2 so as to be rotatable toward the auxiliary engine frame 3, and the capacity H7 is set at the solid line 1a in FIG. By pulling and rotating the hanging cord 9 from the imaginary line position, the co-roller 8.8 is advanced toward the auxiliary machine frame 3, and by the reverse action, it is moved backward, and the spring 10 moves the coroller 8.8 toward the auxiliary machine frame 3. 8 is self-maintained in the backward state (shown by the solid line in FIG. 2), and constitutes an advance/retreat operating device (1).

The driven wheel is provided with a fork 14 rotatable around the same axis 13 horizontally 1ql+13 facing the center of the tree trunk 12 which is held between the two machine frames 2 and 3 by the force of the spring 5. This is a flexible ring 16 that protrudes in a direction crossing the direction of 13 and has a rubber ring 15 pivotally supported on the same fork 14. 17 in the figure is a guide rod installed in the middle of the main engine frame 2 toward the auxiliary engine frame 3, and 18 is a guide ring installed in the middle of the auxiliary engine frame 3. Insert it through. Also】9
20 is a driving device for the running wheels 4, 20 is a prime mover using a gasoline engine 9, and a take-up reel with 21 hanging strings 9.

Therefore, the frame 2.3 is placed on both sides of the tree trunk 12, the tree trunk 12 is clamped by the force of the spring 5, and the stacking rod 7 is lowered from the solid line position in FIG. When the four running wheels 4 are moved forward from the solid line position t(f in the same figure to the virtual line position against the angle 5), the four running wheels 4 separate from the tree trunk 12, so the prime mover 20 can be started and the running wheels 4 can be idled. When the stacking rod 7 is raised from the position of the imaginary line to the position of the solid line in FIG. Due to this rotation, both machine frames 2.3 turn A around the outer periphery of the tree trunk 12 in the running direction of the running wheels 4. During this turning upward, the free wheels 16 follow and adapt to the traveling direction.The switch of the prime mover 20 is opened by a timer. , the prime mover 20 stops, and the lifting of both machine frames 2.3 also stops accordingly. Therefore, when the string 9 is pulled downward and the stacking rod 7 is rotated from the solid line position in FIG. 2 to the imaginary line position tty, the rotation occurs. The wheel 8.8 moves forward from the solid line position in the figure to the imaginary line position 1a against the spring 5, and moves the running wheel 4 away from the tree trunk 12 as shown in FIG. Since both machine frames 2.3 are supported on the tree trunk 12 by the free wheels 16, the machine frames 2.3 are vertically lowered without turning, and the free wheels 16 follow the vertical descent.Then, the string 9 is loosened. When the string 9 is loosened, the 415th member 7 becomes the imaginary line in Figure 2 (position 11
It rises from ゛t to the solid line position, and as it rises, the rolling wheel 8.8
The running wheel 4 moves backward from the imaginary line position to the solid line position in the figure.
is pressed against the tree trunk 12V by the force of the spring 5, stopping the descent of both frame frames 2.3. In this state, if you pull the string 9 roughly downward, it will roll 44ri 8.84 due to the same action as the child chain.
-1 F'! ij tf"=Then, the running wheels 4 separate from the tree trunk 12, and repeat the descending motion in the same manner as described above, turning both Azusa frames 2.3 close to the ground.tr<It is possible to descend. .

Conventional pruning machines do not have a driving wheel 401 running wheel scale on the main machine frame, but the driven wheels on the auxiliary machine frame are also installed parallel to each other in a direction diagonal to the lower direction. ) 1 decrease 1)
Wj < , and the turning of the driving wheel: following Φ with respect to the rise;
1 wheel JR) Is the subordinate circle? i'), unreasonable force was applied to the drive running wheels and driven wheels, and it was necessary to increase the output of the prime mover accordingly. It was difficult to descend vertically.

Since the present invention is configured as described above, it is possible to turn the tree trunk 12 using the running wheels 4. The free wheel 16 can easily rotate as described above.
It is possible to follow and adapt to the ascent well, and it is possible to smoothly turn and ascend without applying excessive force to the driving running wheels 4 and the free wheels 16, which not only reduces the rated output of the prime mover 20 but also reduces the weight and climbs. A small pruning machine with strong braking force can be obtained, and it has the effect of being able to smoothly descend vertically without turning.

[Brief explanation of drawings]

Fig. 1 is a front view showing a pruning machine equipped with the pulling mechanism of the present invention, Fig. 2 is a side view of Fig. 1 seen from the left, and Fig. 3 is a plan view of the wheel in the forward state. be. 1. Chainsaw, 2. Main machine frame, 3. Auxiliary machine frame, 4
・・Mutual parallel drive running wheels, 5・・Springs, 8・・Rolling wheels, ]
]...Advance/retreat operation device, 16...Free wheel, 7...4-man Hori Gentleman, where the patent was issued

Claims (1)

[Claims] (1) Consists of a main machine frame 2 having a chain saw 1 and an auxiliary machine frame 3 facing the main machine frame 2.Four mutually parallel driving running wheels 4 are provided on the main machine frame 2, and the running wheels 4 are vertically and diagonally crossed. In a pruning machine in which the auxiliary machine frame 3 is provided with a plurality of driven wheels, and both machine frames 2 and 3 are connected by a spring 5, the main machine frame 2 has a roller that can move forward and backward toward the auxiliary machine frame 3. 8.8 and co-rotating wheels 8.
8. A pull-down mechanism characterized in that an operating device 11 is provided, and the driven wheel is freely movable @16. , (2) Advance/retreat operation device 1] is a stacking rod 7, etc., which is pivotally supported in the middle of the main engine frame 2, and a rolling wheel 8.8 is pivotally supported at the tip of the stacking rod 7! F. A pulling mechanism according to claim 1.