JPS6261292B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pruning machine configured such that the cutting machine runs on a traveling body along annular guides fitted at intervals around the outer circumference of a tree trunk to cut branches around the tree trunk. It is.

This type of pruning machine requires an elevating support means for elevating and supporting the annular guide itself relative to the tree trunk. However, the annular guide cutter and the lifting support means must be integrated, and cannot be carried separately when being carried. However, this type of pruning machine is often used in forests deep in the mountains, and most of the time it is carried by hand, so it cannot be divided into pieces, and if it is heavy, it is of little practical use.

This invention has been made based on the above circumstances, and is constructed so that the cutting machine can be carried in parts, and furthermore, the lifting and lowering support means can be indirectly driven using the traveling motion of the cutting machine. The purpose of the present invention is to provide a pruning machine that has an easy-to-carry configuration that matches the field conditions, and that can also achieve the cutting function and the function of lifting up and down the tree trunk with a single power source.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments. First, an outline of a pruning machine according to the present invention will be explained with reference to FIGS. 1 and 2. The annular guide A has a larger diameter than the tree trunk T.
A rack 4 is formed on the outer periphery of the tree, and a circular arc portion a, which becomes a part of the annular guide A, is configured with a length that is an open opening larger than the diameter of the tree trunk T (the expected maximum diameter of the tree trunk). One end is pivotally supported to one end of the C-shaped body a' of the annular guide A by a pin 5, and the other end is configured to be removably pivotally supported to the other end of the C-shaped body a' by a pin 5'. Further, the cutting machine 7 used here is a chainsaw type, and is installed at one end of the transmission case 6. Power for cutting is received from a small engine E installed at the other end of the transmission case 6 via a transmission system within the transmission case 6. The transmission case 6 is equipped with a running body B, and this running body B is equipped with a pinion 10 (see FIG. 8) driven by the engine E, which is meshed with the outer peripheral rack 4 of the annular guide A. Then, the traveling body B is rotated along the annular guide A by the rotation of the pinion 10, and the cutting machine 7 is rotated around the tree trunk T to carry out the cutting operation. In order to reliably turn this traveling body B along the annular guide A and to maintain good meshing between the pinion 10 and the rack 4, an arm b biased by a spring 9 is pivoted to the traveling body B. Support wheels 8 and 8' are provided on this and the traveling body B, respectively, and are brought into pressure contact with the inner circumferential surface of the annular guide A.

Means for raising and lowering the annular guide A with respect to the tree trunk T can be seen in FIGS. 3 and 4. That is, reference numeral 11 denotes a U-shaped support rod made of pipe, and support rods 12, 12 and 12' are provided above near both ends of the support rod 11 and approximately in the middle of the U-shaped support rod 11, respectively.
is fixed via a lower bolt/nut mounting piece 13. These support rods 12, 12, 12' are each fixed to an annular guide A (avoiding the arcuate portion a). Thereby, the U-shaped support rod 11 is linked to the annular guide A. A pair of support plates 15, 15 are welded near the support rod 12', and a support frame 16 is inserted between these plates and fixed with bolts and nuts 18, 18. A gear box 19 is attached to this support frame 16, which includes a worm wheel 27 that receives power from a worm 26, a gear 28 connected coaxially,
Gears 29, 29 mesh with this gear 28, and a wheel 2 coaxially connected to these gears 29, 29.
A rotary transmission system consisting of 9' and 29' is equipped. Arms 20 and 20' are supported on sleeves 21 and 21 which are rotatable and coaxial with the gears 29 and 29, and clamping rollers that roll against the tree trunk T are attached to the tips of the arms 20 and 20'. 1
a and 1b are pivotally supported. The above clamping roller 1
Wheels 32, 32 coaxially connected to a, 1b
Sprocket chains 33, 33 are wound between the wheels 29', 29' and the wheels 29', 29', thereby making it possible to transmit rotational power from the rotating gear system to the holding rollers 1a, 1b. ing. Further, in order to press the clamping rollers 1a, 1b against the tree trunk T, a tension coil spring 25 is stretched between locking plates 24, 24 provided at the ends of both arms 20, 20'.

The worm 26 is connected via a shaft 26' to a pinion 17 supported in an annular guide A, and the pinion 17 is mounted on the outer periphery of an annular rotating frame C that can pivot concentrically along the annular guide A. It meshes with the provided rack teeth 17a. The annular rotating frame C has an arcuate opening/closing part C'' with respect to the C-shaped main body C, and like the annular guide A, it has a structure that allows the opening/closing part C'' to be opened and closed to one side. There is. In addition, in order to securely hold the annular guide A, support rings 8a, 8a are provided separately from the previous support ring 8', and each flange part is supported by the annular guide A. It is connected to the circumference. The support ring 8' is equipped with a bearing and has a cylindrical shaft 8b inside.
The cylindrical shaft 8b is fixed to the rotating frame C. A pin 8c on the traveling body B side is removably inserted into the cylindrical shaft 8b.

Further, a plate body 37, which has elongated holes 36, 36 formed in the intermediate portions of the arms 20, 20', respectively.
37 is fixedly installed, and engagement ends 40, 40 bent in the same direction are inserted into the long holes 36, 36 at both upper and lower ends of the control rod 39. Above control rod 3
9 is fixed to the front part of the frame 16 in the vertical direction with clamps 38, 38. However,
The movements of the upper and lower arms 20, 20' are restricted so that they rotate by the same amount. An operating piece 42 is pivotally supported at one end of the frame 16 by a pin 43.
A string 41 is wound around a wheel 44 that is pivotally supported on the operating piece 42, and both ends of the string 41 are connected to the plates 37, 37.
Continuously linked to. In addition, the reference numeral 45 in the figure is a stopper that abuts one end of the support frame 16 when the actuating piece 42 rotates upward and restricts the amount of rotation, and 47 is a long operating lever 4 for operating the actuating piece 42.
It is a fitting tube into which 6 is inserted. Further, 68 and 70 are control wires attached to the actuating piece 42 via a connector 69, and these wires 68 and 70
The other end is attached to an arm 67, which will be described later.

Further, connecting plates 50, 50 are welded to both ends of the U-shaped support rod 11, respectively.
A support frame 48 is fixed to 50 with bolts and nuts 51. Rod arms 52, 52' are pivotally supported by pins 53, 53' in mounting holes 54, 54 drilled in the support frame 48, and clamping rollers 2a, 2b, 3a, 3b are attached to the tips of the rod arms 52, 52'. is pivoted. A tension coil spring 56 is tensioned between brackets 55 and 55 provided at the ends of each arm 52 and 52', and both clamping rollers 2a and 2
b, 3a, and 3b are pressed against the tree trunk T.

A long hole 5 is provided near the middle of both arms 52, 52'.
Connecting pieces 58 and 58 with openings 7 and 57 are provided in a protruding manner, respectively, and engaging ends 60 and 60 of the control rod 59 bent at both ends are inserted into these elongated holes. The control rod 59 does not move in the vertical direction because it is restricted by supports 72, 72 fixed to the upper and lower parts of the support frame 48, but it rotates in the rotational direction, and controls the amount of rotation of the arms 52, 52'. Make the top and bottom almost the same.

At the base of the arms 52, 52' there is a plate 61,
61' is provided with rings 62, 6
A control link 64 is pivotally connected at both ends via 2'. This control link 64 is connected to the arm 6
7, which is pivotally supported in the center by a pin 65 in a pivot hole 66 drilled in the frame 48, and is rotated by pulling a control wire 68 attached to an arm 67, and is activated by a tension coil spring. 56
The arms 52, 52' are opened against the force and have the function of separating the clamping rollers 2a, 2b from the tree trunk.

The holding rollers 1a, 1 shown in FIG.
This is to ensure that each pair of arms b, 2a, 2b, 3a, and 3b rotates the same amount to keep the tree trunk always in the center of the annular guide A. Here, the U-shaped support rod 11 is equipped with a guide ring 35, a pivot shaft 90 is rotatably inserted into the guide ring 35, and rods 92 and 93 are connected to each shaft end via a universal joint 91. 92,93
are inserted into the holes drilled in each of the plates 37', 37' and 61', 61' fixed to the base side of each arm 20', 52', 52' (see Fig. 14) and interconnected. This prevents one set of clamping rollers from moving forward or backward unilaterally with respect to the tree trunk. In addition,
It is preferable that the rods 92 and 93 each include a length adjustment mechanism.

Therefore, when performing pruning work, place the pruning machine at the bottom of the tree trunk T, pull out the pin 5' to open the arcuate part a, and open the opening/closing part C'', as shown by the imaginary line in FIG. Put it inside the annular guide A and the rotating frame C, but at that time,
As shown in FIGS. 9 and 11, each clamping roller 1a, 1b, 2a, 2b, 3a, 3b is pulled inward by the tension coil springs 25, 56, and is placed in the fitting tube 47. Inserted operating lever 4
6 is rotated as shown by arrow A in FIG. 11, the actuating piece 42 rotates around the pin 43 as shown in FIG. attracted by
Both clamping rollers 1a, 1b move outward against the tension coil spring 25, and clamping rollers 2a, 2b, 3
As shown in FIG. 12, a and 3b are each moved outward against the tension coil spring 56 to expand the internal gap, and as shown in FIG. The tree trunk T can be placed within the center of the guide A.

Next, when the operating lever 46 is rotated in the direction of the reverse arrow A so that the stopper 45 abuts against the support frame 16, each string 41 and control wires 68, 70 are loosened by the amount of tension that has been applied so far. , holding rollers 1a, 1b, 2a, 2b
and 3a, 3b are brought into pressure contact with each other by the tension coil springs 25, 56, that is, toward the periphery of the tree trunk T, and as shown by imaginary lines in FIG. The clamping rollers are joined, and the clamping roller 1 is joined on three sides.
a, 1b, 2a, 2b, 3a, and 3b are in pressure contact with each other at the top and bottom. Therefore, by adding the mechanism shown in Fig. 14, the tree trunk T is substantially
The center position is reached, and the entire body is firmly supported.

Therefore, with the arc part a closed and the opening/closing part C'' closed, and these parts fixed with pins, the engine E is
When started, the pinion 10 meshes with the rack teeth 4 and rotates, and the running body B moves along the circumference of the annular guide A due to the pressure rolling of the support wheels 8 and 8', and the cutting machine 7 It moves along the circumference of the tree trunk T while rotating and cuts branches one after another. Cutting machine 7
As the rotating frame C starts rotating with respect to the annular guide A, this causes the rack tooth 1 to rotate.
The pinion 17 that engages with the shaft 26' rotates and the shaft 26'
Power is transmitted to the worm 26 via the worm 26. As a result, the transmission system works, and both the clamping rollers 1a and 1b can be forcibly rotated in the same direction.The rotation of the clamping rollers 1a and 1b, which are in pressure contact with each other, causes the whole body to move upwardly around the tree trunk T in a straight line. The cutting machine 7 cuts the branches around the upper part one after another and performs pruning.

When the combination of gears provided in the gear box 19 is changed by pulling an operating string (not shown) from below, the holding rollers 1a and 1b rotate in opposite directions, and the entire structure can be lowered.

In the above embodiment, the rotary frame C is rotatably supported concentrically with respect to the annular guide A by the three pairs of support wheels 8, 8', 8a, 8a', but for the same purpose, as shown in FIG. As shown in , the rotating frame C is completely supported by the annular guide A via rollers 34 provided in the annular guide A, and a simple fitting tube 8 is used to connect the rotating frame C and the traveling body B.
Of course, a combination of b' and pin 8c' may also be used. When configured in this way, the support wheel 8
Even if 8' and 8' are omitted, the running motion of the cutting machine 7 relative to the annular guide A is reliably maintained.

As described in detail above, in this invention, a rack is provided on the outer periphery of the annular guide fitted at intervals around the outer periphery of the tree trunk to engage with a pinion driven by the engine of the traveling body. A rotary frame having rack teeth provided on its outer peripheral surface is rotatably supported on the inner side of the same plane as the annular guide, and the traveling body is configured to be detachably attached to the rotary frame,
The traveling body is configured to be held by both an annular guide and a rotating arm, and a downwardly extending shaft is pivotally attached to the annular guide, and a pinion that meshes with a pinion of the rotating frame is attached to the upper end of the shaft. A rotary transmission system is provided at the lower end of the shaft, which is interlocked with the gearbox of a pinching roller that drives the annular guide up and down relative to the tree trunk, and is located below the annular guide and presses against the tree trunk from the radial direction. Since at least one of the clamping rollers is configured to be driven, the traveling body can be easily separated from the rotating frame, and these can be carried separately, making it easy to carry in and out of mountainous areas, etc., reducing fatigue during transportation. This is greatly reduced, and since the traveling body can be separated, the cutting machine can be easily repaired. Furthermore, when the running body is installed,
Since it can be held by the outer circumferential side of the annular guide and the rotating frame, it can be mounted reliably in a short time, and the traveling body, which is the driving source, does not come off carelessly during work, making the work safe. In addition, even if the traveling body is separated, the rotating frame and the pinching roller are integrally constructed around the annular guide, so the rotation transmission system for transmitting the driving force of the pinching roller is simple. There is no waste in power transmission either. Moreover, since the distance between the cutting machine and the holding roller can be made relatively short, the cutting machine does not twist, and cutting can be performed stably and reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of the invention, in which Fig. 1 is a perspective view of a part of the pruning machine, Fig. 2 is a plan view thereof, and Fig. 3 is a partial perspective view of the pruning machine.
Figure 4 is a partially cutaway side view of Figure 3, Figure 5 is a side view of the opposite side of Figure 4, Figure 6 is a plan view of the main parts with some parts omitted. is a diagram showing a part of Figure 5, Figure 7 is an enlarged view of a part of Figure 5, and Figure 8 is a diagram showing a part of Figure 5.
The figure is a longitudinal sectional view of a part of Fig. 7, Fig. 9 is a side view of a part of Fig. 3, and Fig. 10 is an exploded perspective view of Fig. 9.
Fig. 11 is an explanatory diagram of the operation of Fig. 5, and Fig. 12 is an explanatory diagram of the operation of Fig. 9.
13 is a sectional view of an annular ring showing another embodiment, and FIG. 14 is a drawing showing an example of means for regulating the operation of the holding roller. 1a, 1b, 2a, 2b, 3a, 3b... each clamping roller, 4... rack, 5, 5'... pin, 6
...Transmission case, 7...Cutting machine, 8, 8'...Support wheel, 8a, 8a...Support wheel, 8b...Cylinder shaft, 8
b'... Fitting tube, 8c, 8c'... Pin, 9... Spring, 10... Pinion, 11... U-shaped support rod, 1
2, 12, 12'... Support rod, 13... Lower bolt nut mounting piece, 15, 15... Support plate, 16...
Support frame, 17... Pinion, 17a... Rack tooth, 18, 18... Bolt nut, 19...
Gearbox, 20, 20'...Arm, 21,
21... Tube metal, 24, 24... Locking plate, 25...
Tension coil spring, 26... Worm, 26'...
Axis, 27... Worm wheel, 28... Gear, 2
9... Gear, 29'... Wheel, 32, 32...
... Wheel, 33, 33 ... Sprocket chain, 34, 34 ... Roller, 35 ... Guide ring, 36, 36 ... Long hole, 37, 37 ... Plate body,
37', 37'... plate body, 38, 38... clamping metal,
39... Control rod, 40, 40... Engagement end, 41
... String, 42 ... Actuation piece, 43 ... Pin, 44 ...
... Wheel body, 45 ... Stopper, 46 ... Operation lever, 47 ... Fitting tube, 48 ... Support frame, 50
... Connecting plate, 51 ... Bolt nut, 52,5
2'... Rod arm, 53, 53'... Pin, 5
4, 54... Mounting hole, 55, 55... Bracket, 56... Tension coil spring, 57, 57... Long hole, 58, 58... Connection piece, 59... Control rod, 6
0, 60... Engaging end portion, 61, 61'... Plate body,
62, 62'... link, 64... control link,
65... Pin, 66... Pivot hole, 67... Arm, 68... Control wire, 69... Connector, 70... Control wire, 72... Support metal, 90... Pivot, 91... Universal Joint, 92, 93...rod, T...trunk, A...
...Annular guide, a...Circular part, a'...C-shaped main body, E...Small engine, B...Traveling body, b...
Arm, c...rotating frame, C'...C-shaped main body, C''...opening/closing part.

Claims (1)

[Claims] 1. In a pruning machine configured such that a cutting machine cuts branches around the tree trunk, the cutting machine runs on a ring-shaped guide fitted at intervals around the outer circumference of the tree trunk, and the running body is mounted on the outer peripheral surface of the annular guide. A rack is provided which meshes with a pinion driven by the engine, and the annular guide rotatably supports a rotating frame having rack teeth on the outer circumferential surface on the inside of the same plane as the annular guide. The traveling body is configured to be detachable, and the traveling body is configured to be held by both an annular guide and a rotating arm, and a vertically extending shaft is pivotally attached to the annular guide, and a shaft is attached to the upper end of the shaft. A pinion that meshes with the pinion of the rotating frame is fixed, and the lower end of the shaft is provided with a rotation transmission system that is interlocked and connected within the gear box of the clamping roller that drives the annular guide up and down with respect to the tree trunk.
A pruning machine characterized in that it is configured to drive at least one of the clamping rollers located below the annular guide and press against the tree trunk from the radial direction.