JPS6230930Y2 - - Google Patents

Description

[Detailed description of the invention] This invention connects a main engine frame 2 with a chain saw 1 and an auxiliary machine frame 3 facing it with a spring 4, and connects four mutually parallel drive wheels 5 and their prime mover 6 to the main engine frame 2. The wheels 5 are arranged obliquely with respect to the vertical direction of the tree trunk 13, and the auxiliary machine frame 3 is provided with a plurality of free wheels 7, and the main machine frame 3 is provided with a direct descending wheel that can be moved forward and backward toward the auxiliary machine frame 2. In a pruning machine equipped with a wheel 8 and a device 9 for advancing and retracting the wheel 8, a string 10 for operating the wheel 8 is wound around a reel 11, the reel 11 is suspended from the main machine frame 2, and the above-mentioned The present invention relates to a pull-down operation device for a pruning machine which is equipped with a reel dropping device 12 that is linked to a prime mover 6, and is an operation device for directly lowering a tree trunk 13 after turning it up.

The chain saw 1 is provided on the upper part of the main engine frame 2 so as to protrude upward, and can cut the branch 14 as both the engine frames 2 and 3 turn upward. A small gasoline engine is used as the prime mover 6, and a power transmission device 15 is interposed between the drive wheels 5 and the chain saw 1. The free wheel (caster) 7 is a driven wheel, and the horizontal support shaft 1 is directed toward the center of the tree trunk 13 between the two machine frames 2 and 3.
A fork 17 that freely moves around a coaxial shaft 16 is pivotally supported on the fork 6, and a rubber ring 18 is pivotally supported on the fork 17. The advancing/retracting operation device 9 consists of an inclined ram 19 pivotally supported on the main engine frame 2 and an operating string 10 hanging from the upper end of the ram 19, and the straight lowering wheel 8 is connected to the ram 1
It is pivotally supported at the lower end of 9. The rotating shaft 22 of the wide sprocket 21 meshed with the chain 20 of the chain saw 1 is connected to the output shaft 23 of the prime mover 6 and the sprocket 2.
4 and a chain 25, and one end of the rotating shaft 22 has a spring 26 that opens against the spring 26 by rotational force as shown in FIGS. 5 and 6.
A plate 28 which pivotally supports the opening/closing arms 27, 27 which are closed by the force of the spring 26 and presses against the tips of the arms 27, 27 which are closed by the force of the spring 26, and a droop formed by being bent integrally with the plate 28. The plate 29 is suspended from the main engine frame 2 by pins 30. An independent hanging plate 31 is pivotally supported on a pin 30 between both plates 28 and 29, and a stopper 32 maintains the mutual distance between both hanging plates 29 and 31. Further, between the two hanging plates 29, 31, there are two downwardly pronged plates 33, 3 pivoted to pins 30, through holes 34, 35 are bored in the two pronged plates 33, 33, respectively, and an independent hanging plate is provided. 31
A knife 36 to be inserted into the through hole 34 on one side is provided protrudingly, and a pin 37 to be inserted into the through hole 35 on the other side is provided protrudingly at a position lower than the knife 36 on the other hanging plate 29. There is a spring 3 between the knife 36
A dropping device 12 for the reel 11 is constructed by interposing the reel 8. In the figure, numeral 39 is a suspension arm provided on the reel 11, 40 is a suspension hole formed in the arm 39, and 41 is a handle of the reel 11.

Therefore, when the suspension arm 39 of the reel 11 is inserted into the bifurcated plates 33, 33, the arm 39 presses the knife 36 against the spring 38, and eventually the knife 36 is released as shown in FIG. By entering the suspension hole 40 with a force of 38 and locking the arm 39, the reel 11 can be suspended from the main engine frame 2 as shown in FIG. After that, when the prime mover 6 is started, the rotation shaft 22 rotates and opens the opening/closing arms 27, 27, so that the pressure contact plate 28
As shown in Fig. 6, the spring 42 is centered around the pin 30.
It rotates with the force of and is supported at the tip of the rotation shaft 22. In this state, both hanging plates 29 and 31 are connected to the stopper 32.
6, but since the two-pronged plates 33 and 33 do not tilt, the knife 36 comes out of the suspension hole 40, but the lower pin 37 enters the same hole 40, so the suspension arm 39 The reel 11 descends from the position shown in FIG. 5 to the position shown in FIG. 6, and is supported by the pin 37, so that the reel 11 continues to be suspended. Since the rotation shaft 22 is rotated by the prime mover 6 and the driving wheels 5 are also rotated, the frames 2 and 3 are rotated up the tree trunk 13 and the chain saw 1 cuts the branch 14. After turning and rising to a predetermined height, the prime mover 6 is activated by the operation of the timer.
When the switch is opened and the prime mover 6 is stopped, the drive wheel 5 and rotation shaft 22 are stopped, and the lifting of both machine frames 2 and 3 is stopped. At the same time, the opening/closing arms 27 are closed by the force of the spring 26 as shown in FIG. . and board 28
The knife 36 is pushed to the right in FIG. 7 by the force of the spring 26, but the knife 36 comes into contact with the suspension arm 39, which is slightly lowered, and does not enter the through hole 40, and the pin 37 also moves to the right in FIG. Since the arm 39 and reel 11 move and come out of the hole 40, they fall downward and fall within the reach of a person standing on the ground. Therefore, when a person pulls the string 10 downward by gripping the reel 11 and turning the handle 41, the direct lowering wheels 8 come into pressure contact with the tree trunk 13 via the lever 19, so that the drive wheels 5 Separate from the tree trunk 13. In other words, the pruning machine is supported by the tree trunk 13 by the rollers 8 and the free wheels 7. Further, since the wheel 8 rolls vertically with respect to the tree trunk 13, the pruning machine uses the free wheel 7 and the wheel 8 to move the tree trunk 1.
You will be going straight down 3.

All conventional pruning machines rotate and descend, and it takes time to descend, making it impossible to perform pruning work with high efficiency.

However, in the present invention, as described above, the operating string 10 of the wheel 8 is wound around a reel 11, the reel 11 is suspended from the main engine frame 2, and a reel dropping device 12 is provided which is interlocked with the prime mover 6. Therefore, even when the pruning machine turns and rises, the string 10 is connected to the tree trunk 1.
3, and after rising to a predetermined height, the reel 11 is dropped by stopping the prime mover 6, and by winding the string 10 of this reel 11, the pruning machine is lowered directly. time is short,
Pruning work can be done efficiently.

Moreover, the string 10 is connected to the main machine frame 2 by the reel 11.
Since the string 10 does not hang down, the string 10 does not wrap around the tree trunk 13 even when the pruning machine turns and rises.

[Brief explanation of the drawing]

Fig. 1 is a front view showing a pruning machine using the pulling operation device of the present invention, Fig. 2 is a side view of Fig. 1 seen from the left, Fig. 3 is a plan view of the device, and Fig. 4 is a A vertical sectional view of the reel dropping device, Figure 5 is a diagram of the reel suspended state,
FIG. 6 is an operating state diagram, and FIG. 7 is a reel falling state diagram. 1...Chain saw, 2...Main machine frame, 3...Auxiliary machine frame, 4...Spring, 5...Drive wheel, 6...Motor, 7...Swivel wheel, 8...Top-down roller, 9 ……
Advancement/retraction operation device, 10... operation string, 11... reel, 12... reel dropping device.

Claims (1)

[Scope of utility model registration request] The main engine frame 2 with the chain saw 1 and the auxiliary machine frame 3 facing it are connected by a spring 4, and the main engine frame 2 is connected to the main engine frame 2.
A plurality of mutually parallel drive wheels 5 and their prime mover 6 are provided, and the wheels 5 are arranged obliquely with respect to the vertical direction of the tree trunk 13, and a plurality of free wheels 7 are provided on the auxiliary machine frame 3, and a direct descending wheel is provided at the tip. In a pruning machine, a pruning rod 19 having a wheel 8 and an operating string 10 provided at the rear thereof is provided on the main machine frame 2 so as to be rotatable so that the wheel 8 approaches and leaves a tree trunk. 8 is wound around a reel 11, the reel 11 is suspended from a main machine frame 2, and a reel dropping device 12 interlocked with the prime mover 6 is provided.