JPH036191Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an automatic pruning machine that cuts branches while pressing a drive wheel or the like against a tree trunk and driving a frame body to spiral around the tree trunk.

Conventional technology This type of conventional automatic pruning machine has a drive wheel that is rotatably driven by an internal combustion engine installed in the frame, and a drive wheel that is attached to the frame on the opposite side of the drive wheel across the tree trunk. It has driven wheels.

Problems to be Solved by the Invention In such conventional automatic pruning machines, the driving wheels are only provided on one side of the frame, so the automatic pruning machine cannot be driven to rotate relative to the tree trunk without slipping. It was difficult to reliably move the tree trunk up and down in the length direction.

SUMMARY OF THE INVENTION An object of the present invention is to solve the problems of conventional automatic pruning machines of this type and to provide an automatic pruning machine that reliably swings and performs pruning work efficiently.

Means for Solving the Problems The automatic pruning machine according to the present invention has two frame parts disposed so as to hug a tree trunk, and a power supply installed in the first frame part of the frame parts. a drive wheel driven by a drive wheel; a drive shaft having a non-circular cross-section that is supported by the first frame portion, extends toward the second frame portion, and is rotationally driven; and the second frame portion. a driven member rotatably supported by the drive shaft and having a bearing hole having a complementary shape to the drive shaft and into which the drive shaft is slidably fitted in the axial direction; and a driven member provided in the second frame portion. and an auxiliary drive wheel drivingly connected to the driven member.

Effects With the configuration of the present invention, the drive wheels and auxiliary drive wheels are placed across the tree trunk, and the machine body is reliably moved in the vertical direction with respect to the tree trunk, and the driving force is transmitted to the auxiliary drive wheels. Since the drive shaft and the driven member are slidably fitted together in the axial direction, it also functions as a guide device for connecting the frame portions to each other.

Embodiments Next, the present invention will be described based on illustrated embodiments.

Note that the general structure of an automatic pruning machine, such as a cutting device, that is not directly related to the present invention has been omitted.

The automatic pruning machine of this embodiment has two frame parts 1 and 2 arranged so as to hug a tree trunk T. The first frame portion 1 is provided with a belt-type drive device 3 that is rotationally driven by power from an internal combustion engine (not shown) mounted thereon. The drive wheels are arranged so as to be in pressure contact with the periphery of the tree trunk T while being inclined with respect to the direction, and constitute drive wheels for swinging and driving the automatic pruning machine.

The second frame part 2 has two driven wheels 4 and 5 arranged on one side thereof, and one auxiliary drive wheel 6 arranged on the other side thereof. As will be described later, the belt type drive device 3
Receives power transmission from. The driven wheels 4 and 5 and the auxiliary drive wheels 6 are arranged so as to be inclined with respect to the length direction of the tree trunk T and press against the periphery of the tree trunk T, similarly to the belt type drive device 3. In cooperation with the tree trunk T, the machine body can be moved in the vertical direction while turning in a spiral manner around the tree trunk T.

One end of a pair of springs 7 and 8 is mounted on each side of the second frame portion 2, and a continuous series of locking rings 9 and 10 are mounted on the other ends of the springs 7 and 8, respectively. . On the other hand, the first frame portion 1 has a pair of locking pieces 11 and 12 on both sides thereof.
Depending on the diameter of the tree trunk T, one of the locking rings 9 is locked to one of the locking pieces 11, and one of the other locking rings 10 is locked to the other locking piece 11. A belt-type drive device 3, driven wheels 4, 5 and the auxiliary drive wheel 6 can be adjusted. Further, a guide rod 1 is provided on one side of the first frame portion 1.
3 is fixed, and the leading end of the guide rod 13 is slidably fitted into a hole in a guide sleeve 14 formed on one side of the second frame part 2, thereby allowing the guide rod 13 to slide between the frame parts 1 and 2. It is designed to guide and hold 2.

Output gear device 15 on the other side of first frame portion 1
is attached, and the input gear 16 of the output gear device 15 is connected to the sprocket 1 attached to its shaft.
7. It is connected to the belt type drive device 3 via the sprocket 18 attached to the drive shaft 32 of the belt type drive device 3 and the chain 19 that spans these sprockets 17 and 18, and is driven to rotate. The other end of the drive shaft 20 attached to the output gear 29 of the output gear device 15 is inserted into the bearing hole 31 of the input gear 30 of the input gear device 21 attached to the other side of the second frame portion 2. They are fitted to be slidable in the axial direction. The drive shaft 20 and the bearing hole 31 of the input gear 30 of the input gear device 21 into which it fits are formed in a quadrangular cross-sectional shape that is complementary to each other, and the input gear 30 and the drive shaft 20 can slide relative to each other in the axial direction. However, they are configured so that they cannot rotate relative to each other. In this way, the drive shaft 20 and the input gear 30 of the input gear device 21 are connected to the first and second frame portions 1.
and 2, which guides and holds the other side opposite to the guide rod 13, and functions to transmit rotational driving force from the output gear device 15 to the input gear device 21.

Input gearing 21 has an output gear 22 engaged with input gear 30, and output gear 22 has a sprocket 23 mounted on its shaft. A chain 25 is stretched between the sprocket 23 and a sprocket 24 attached to the shaft of the auxiliary drive wheel 6. With this configuration, the auxiliary drive wheel 6 is driven simultaneously with the belt type drive device 3 that constitutes the drive wheel, and the automatic pruning machine can be reliably moved with respect to the tree trunk T.

The driven wheels 4 and 5 are connected to one wheel support 26
It is rotatably supported on the shaft. The wheel support 26 is rotatably attached to a pivot shaft 28 attached to a protruding portion 27 formed on the second frame portion 2 . The driven wheels 4, 5 and the pivot shaft 28 are arranged so that their axes extend parallel to each other. With this configuration, even if the diameter or surface shape of the tree trunk T changes, the wheel support 26 rotates around the pivot shaft 28, so both driven wheels 4 and 5 can be reliably moved around the tree trunk T. Bring it into contact. In this way, the belt type drive device 3, the driven wheels 4, 5, and the auxiliary drive wheels 6 form a three-point support structure that holds the machine body against the tree trunk T in the most stable manner.

Effects of the invention With the structure of the invention explained above, the driving wheels and the auxiliary driving wheels are arranged to sandwich the tree trunk from both sides, and the machine body can be reliably rotated relative to the tree trunk. Since the drive shaft with a non-circular cross-sectional shape and the driven member fitted thereto are slidably fitted in the axial direction for transmitting power to the drive wheels, the diameter of the tree trunk T changes and the first And even if the interval between the second frame parts changes, the frame part can be guided and supported while reliably transmitting driving force, so the machine can be attached to trees with small to large diameters, and can be reliably swiveled for pruning. Able to perform work.

[Brief explanation of the drawing]

The drawing is a schematic plan view showing an embodiment of an automatic pruning machine according to the present invention. DESCRIPTION OF SYMBOLS 1, 2... Frame part, 3... Belt type drive device, 6... Auxiliary drive wheel, 15... Output gear device, 20... Drive shaft, 21... Input gear device, 3
1...Bearing hole.

Claims (1)

[Scope of utility model registration request] two frame parts disposed so as to hug a tree trunk; a drive wheel provided on a first frame part of the frame parts and driven by power; and a drive wheel supported by the first frame part. a drive shaft with a non-circular cross-sectional shape that extends toward the second frame portion and is rotationally driven; and a bearing hole that is rotatably supported by the second frame portion and has a complementary shape to the drive shaft. and an auxiliary drive wheel provided on the second frame portion and drivingly connected to the driven member. An automatic pruning machine characterized by: