JPS6328570B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a pruning machine in which a cutting machine is configured to cut branches around a tree trunk by means of a traveling body along annular guides fitted at intervals around the outer circumference of the tree trunk. It is related to.

This type of pruning machine requires lifting and supporting means for lifting and lowering the annular guide itself relative to the tree trunk. , are provided so as to be movable forward and backward with respect to the annular guide, and each of these holding rollers travels in the vertical direction while rolling in contact with the surface of the tree trunk. However, the surface of the tree trunk is partially uneven, and when one of the pinching rollers reaches the unevenness, only that pinching roller follows the unevenness of the tree trunk and moves partially back and forth, causing the annular guide to move around the tree trunk. However, the cutting machine, which runs along this annular guide, becomes misaligned with the tree trunk and cuts around the tree trunk. It was not possible to cut the branches to the same size. Also, the diameter of the tree trunk becomes smaller as it goes upwards, and the diameter of the tree trunk changes, but if the diameter of the tree trunk changes and the annular guide deviates from the axis of the tree trunk, the branches will be cut to the same size. I couldn't do it.

This invention was made based on the above-mentioned circumstances, and the diameter of the tree trunk becomes smaller as it goes upward. However, since the plurality of clamping rollers provided on the annular guide move forward and backward in synchronization, the diameter of the tree trunk can be adjusted. Even if the angle changes, the amount of advance and retreat of each clamping roller remains the same, and the center of the annular guide is automatically adjusted to be located at the axis of the tree trunk, so that the annular guide can always be maintained perpendicular to the axis of the tree trunk. To provide a pruning machine capable of cutting branches around a tree trunk to the same size.

Hereinafter, the present invention will be specifically explained based on illustrated embodiments. First, the 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, has a length that is larger than the diameter of the tree trunk T (the expected maximum diameter of the tree trunk), and its length is 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'. do. Further, the cutting machine 7 used here is a chainsaw type, and is installed at one end of the transmission case 6. Then, the transmission case 6
It receives power for cutting from a small engine E installed at the other end. Above transmission case 6
is equipped with a running body B, and this running body B has a pinion 10 driven by the engine E.
(see Fig. 8), which is meshed with the outer peripheral rack 4 of the annular guide A, and by rotation of the pinion 10, the traveling body B is turned along the annular guide A, and the cutting machine 7 is moved to the tree trunk T. Cutting work is performed while rotating the machine around the machine. This traveling body B is reliably rotated along the annular guide A, and the pinion 10
In order to properly maintain the meshing between the arm b and the rack 4, an arm b biased by a spring 9 is pivotally supported on the traveling body B, and support wheels 8 and 8' are provided on this and the traveling body B, respectively. , is pressed against the inner peripheral surface of the annular guide A.

The means for raising and lowering and supporting 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 respectively provided with lower bolt/nut mounting pieces 13 above the upper portion near both ends of the support rod 11 and approximately in the middle of the U-shaped support rod 11. Through,
It is permanently installed. These support rods 12, 12, 12' are
Each annular guide A (avoiding the arc part a)
will be permanently installed. Thereby, the U-shaped support rod 11 is linked to the annular guide A. In addition, the support rod 12'
A pair of support plates 15, 15 are welded together in the vicinity of , 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 (see FIG. 8), a gear 28 that is directly connected to the worm 26, and a gear 29 that meshes with this gear 28. , 29, and wheels 29', 29' coaxially connected to these gears 29, 29. And the above gear 2
Arms 20 and 20' are supported on tube metals 21 and 21 which are coaxial with 9 and 29 and are freely rotatable. 1b is pivotally supported. Wheels 32, 32 coaxially connected to the nipping rollers 1a, 1b and the wheel 29',
29', there is a sprocket chain 33,3
3 is wound around the rollers 1a and 1b, thereby making it possible to transmit rotational power from the rotational transmission system to the nipping rollers 1a and 1b. In addition, the pinching rollers 1a, 1
In order to press b to the tree trunk T, both arms 20,2
Between the locking plates 24 and 24 provided at the tip of 0',
A tension coil spring 25 is tensioned.

The worm 26 is connected to a pinion 17 supported in an annular guide A via a shaft 26'. It meshes with the lock teeth 17a provided on the outer periphery.
The annular rotating frame C has a C-shaped main body.
It has an arc-shaped opening/closing part C'' relative to C', and like the annular guide A, the opening/closing part C'' can be opened and closed to one side. In addition, in order to securely hold the annular guide A, indicator wheels 8a, 8a are provided in addition to the previous support ring 8', and while each flange is supported by the annular guide A,
It is connected to its inner circumference. The support ring 8' is equipped with a bearing having a cylindrical shaft 8b inside, and the cylindrical shaft 8b is connected to the rotating frame C.
It is fixedly installed. A pin 8c on the traveling body B side is removably inserted into the cylindrical shaft 8b.

Further, in the intermediate part of the arms 20, 20',
Plate body 3 forming elongated holes 36, 36, respectively
7 and 37 are fixedly installed, and for the elongated holes 36 and 36, an engagement end 4 is formed by bending both the upper and lower ends of the control rod 39 in the same direction at right angles to the longitudinal direction thereof.
0,40 are inserted. The control rod 39 can rotate the inner ends of the bent portions at both ends of the shaft vertical to the front part of the frame 16 about the vertical axis by means of clamps 38, 38, but cannot move in the vertical direction. It is installed like this.

Thus, the movements of the upper and lower arms 20, 20' are regulated so that they move in a fan-like manner substantially in unison. A pin 43 is attached to one end of the frame 16.
An actuating piece 42 which is pivotally supported is disposed, and this actuating piece 42
A string 41 is wound around a ring 44 which is pivotally supported, and both ends of the string 41 are connected to the plates 37, 37. In addition, in the figure,
Reference numeral 45 denotes a stopper that abuts one end of the support frame 16 when the actuating piece 42 rotates upward to restrict the amount of rotation thereof, and 47 inserts a long operating lever 46 for operating the actuating piece 42. It is a cylinder. In addition, 68 and 70 are connected to the actuating piece 42 by a connecting tool 69.
The other ends of these wires 68 and 70 are 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.
0 and 50, a support frame 48 is fixed with bolts and nuts 51. The mounting holes 54, 54 drilled in the support frame 48 have pins 53, 5.
3', rod arms 52, 52' are pivotally supported, and clamping rollers 2a, 2b, 3 are attached to the tips of the rod arms 52, 52'.
a and 3b are pivotally supported. And each arm 5
Brackets 55, 55 provided at the tips of 2, 52'
A tension coil spring 56 is tensioned between the two holding rollers 2a, 2b, 3a, and 3b so as to press them 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 is connected to the support frame 4 in the vertical direction.
Although it is restricted by supports 72, 72 fixed to the upper and lower parts of the arm 8, it does not move, but is rotated in the rotational direction, so that the arms 52, 52' rotate vertically in synchronization.

At the base of the arms 52, 52' there is a plate 61,
61' is provided with links 62, 6
2' with a control link 64 at both ends thereof,
It is pivoted. This control link 64 has an arm 67 and is pivotally supported in the center by a pin 65 in a pivot hole 66 bored into the frame 48.
By pulling the control wire 68 attached to the arm 67, the tension coil spring 5 rotates.
6, the arms 52, 52' are opened and serve to separate the pinching rollers 2a, 2b from the tree trunk.

What is shown in FIG.
b, 2a, 2b, 3a, 3b each pair of arms 2
0, 20', 52, 52', 52, 52' rotations are approximately synchronized, and the tree trunk is always placed in the center of the annular guide A. Here, U-shaped support rod 1
1 is equipped with a guide ring 35, into which a pivot shaft 90 is rotatably inserted, rods 92 and 93 are connected to each shaft end via a universal joint 91, and these rods 92 and 93 are connected to each arm. 20′,
52', each plate body 37' fixed to the base side of 52',
They are inserted into the holes drilled at 37', 61', and 61' (see Fig. 14), and are connected to each other to prevent one set of pinching rollers from moving forward or backward unilaterally with respect to the tree trunk. are doing. In addition, Rod 92, 93
It is preferable that each of them be provided with 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' and open the arc part a, as shown by the imaginary line in Fig. 2.
Then, open the opening/closing part C'' and guide the tree trunk T into the circular guide A.
and is placed inside the rotating frame C. At that time, as shown in FIGS. When the operating lever 46 inserted into the fitting tube 47 is rotated as shown by arrow A in FIG. 11 while it is being pulled inward, the actuating piece will move as shown in FIG. 5. 42 rotates around pin 43, so that
The string 41 and the control wires 68, 70 are
The gripping rollers 1a, 1b are pulled outward against the tension coil spring 25, and the gripping rollers 2a, 2b, 3a, 3b are also pulled outward against the tension coil spring 56, as shown in FIG. The rollers are respectively moved outwardly to enlarge the internal gap, and as shown in FIG. 3, the tree trunk T can be inserted into the center of the annular guide A with each roller retracted.

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. The holding rollers 1a, 1b, 2a, 2
b and 3a, 3b are tension coil springs 25, 2
6, the gripping rollers are brought into contact with each other in the direction in which they approach each other, that is, brought together and pressed against the periphery of the tree trunk T, and in FIG. On three sides, the holding rollers 1a, 1b, 2a, 2b, 3a, and 3b are brought into pressure contact with each other at the top and bottom.

In addition, a plurality of pinching rollers 1a, 1b, 2a,
When any of the rollers 2b, 3a, and 3b reaches a partial unevenness on the surface of the tree trunk T, only this roller attempts to advance and retreat with respect to the annular guide A along the uneven surface, but each of the pinching rollers 1a, 1b ,2a,2b,
3a and 3b are linked by a mechanism as shown in FIG. 14, so that they move in synchrony.
When a reaches a partially uneven part of the tree trunk, one plate 61' fixed to the arm 52 supporting the roller 2a moves, and in conjunction with this, the rod 93 and the universal joint move. The pivot 90 rotates through the int 91, and the plates 37',
37' moves, and furthermore, the arm 52' supporting the other pinching roller 3a moves via another pivot 90, etc., so that each of the pinching rollers 1a, 1b,
2a, 2b, 3a, and 3b move synchronously, so that the tree trunk T is substantially at the center position of the annular guide A, and the annular guide A is eccentric in the horizontal direction or vertically with respect to the tree trunk T. Since misalignment such as tilting can be prevented, the cutting machine 7 traveling along the annular guide A will not be misaligned, and branches around the tree trunk can be cut to the same size.

Therefore, when the engine E is started with the arc portion a closed and the opening/closing portion C″ closed and these parts fixed with pins, the pinion 10 meshes with the rack teeth 4 and rotates, and the support wheel 8 , 8', the traveling body B moves along the circumference of the annular guide A, and the cutting machine 7 rotates while cutting the tree trunk T.
It moves around the area and cuts branches one after another. As the cutting machine 7 rotates, the rotating frame C begins to rotate with respect to the annular guide A, so that the pinion 17 that meshes with the rack teeth 17a rotates.
Power is transmitted to the worm 26 via the shaft 26'.
As a result, the transmission system works, and both the pinching rollers 1a,
1b can be forcibly rotated in the same direction, and by the rotation of both clamping rollers 1a and 1b that are in pressure contact with each other, the entire tree moves upward around the tree trunk T in a straight line, The surrounding branches above are cut one after another by the cutter 7 to perform pruning.

Note that if you change the combination of gears in the gear box 19 by pulling the operating string (not shown) from below,
The nipping rollers 1a and 1b rotate in opposite directions, allowing the whole to be lowered downward.

In the above embodiment, the rotary frame C was rotatably supported concentrically with respect to the annular guide A by three pairs of support wheels 8, 8', 8a, 8a'. As shown in the figure, the rotating frame C is completely supported by the annular guide A via rollers 34 provided in the annular guide A, and the rotating frame C and the traveling body B are connected by a simple fitting. Of course, the combination tube 8b' and pin 8c' may be combined. With this configuration, the running motion of the cutting machine 7 relative to the annular guide A can be reliably maintained even if the support wheels 8 and 8' are omitted.

As described in detail above, in this invention, in order to raise and lower the annular guide with respect to the tree trunk, the annular guides fitted at intervals around the outer periphery of the tree trunk are arranged in the same axial direction from a plurality of directions around the outer periphery of the tree trunk. A clamping roller disposed so as to be able to press against the annular guide is pivotally connected to a support frame integrally hanging down from the annular guide, and the forward and backward movement of each of the plurality of clamping rollers by rolling in contact with the outer periphery of the tree trunk is all synchronized with each other. , each arm of each nipping roller is interlocked and connected by a link having a universal joint.
Therefore, the plurality of pinching rollers are connected to each other so that their forward and backward movements due to rolling contact with the outer periphery of the tree trunk are all synchronized with each other. Since it moves toward the tree trunk side with the same dimensions, it does not deviate from the center of the annular guide.In other words, the annular guide can be held in a position almost perpendicular to the axis of the tree trunk, so it can be cut more conveniently from the base of the branch. It is something that plays.

[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 4, 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 a means for regulating the operation of the nipping roller. 1a, 1b, 2a, 2b, 3a, 3b... each pinching roller, 4... rack, 5... pin, 5'...
Pin, 6...Transmission case, 7...Cutting machine, 8,
8'...Support wheel, 8a, 8a...Support wheel, 8b...
...cylinder shaft, 8b'...fitting cylinder, 8c, 8c'...pin,
9... Spring, 10... Pinion, 11... U-shaped support rod, 12, 12, 12'... Support rod, 13... Lower bolt nut mounting piece, 15, 15... Support plate,
16...Support frame, 17...Pinion, 17
a...Rack tooth, 18,18...Bolt nut,
19...Gearbox, 20,20'...Arm,
21, 21... Tube metal, 24... Locking plate, 25...
Tension coil spring, 26... Worm, 26'...
Axis, 27...worm wheel, 28...gear,
29...Gear, 29'...Wheel, 32,32
... Wheel, 33, 33 ... Sprocket chain, 34 ... Roller, 35 ... Guide ring,
36, 36... Long hole, 37, 37'... Plate, 3
8, 38... Clamping metal, 39... Control rod, 40, 4
0... Engaging end, 41... String, 42... Actuation piece,
43... Pin, 44... Wheel body, 45... Stopper, 46... Operating lever, 47... Fitting tube, 48...
... Support frame, 50 ... Connection plate, 51 ... Bolt nut, 52, 52' ... Rod arm, 53,
53'...Pin, 54...Mounting hole, 55, 55...
...Bracket, 56...Tension coil spring, 57,
57... Long hole, 58, 58... Connection piece, 59...
Control rod, 60, 60... Engaging end, 61', 6
1'...Plate, 62, 62'...Link, 64...
Control link, 65...pin, 66...pivot hole, 6
7...Arm, 68...Control wire, 6
9... Connection tool, 70... Control wire, 7
2... Support money, 90... Axis, 91... Universal joint, 92, 93... Rod, T...
Trunk, A... Annular guide, a... Arc part, a'...
C-shaped main body, E...small engine, B...running 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 runs on a traveling body on annular guides fitted at intervals around the outer circumference of a tree trunk to cut branches around the tree trunk, the annular guide has annular guides attached to the tree trunk. In order to raise and lower the tree trunk, clamping rollers are arranged such that they can be pressed against each other in the same axial direction from a plurality of directions around the outer periphery of the tree trunk, and are pivotally connected to a support frame integrally hanging down from the annular guide. A pruning machine characterized in that each arm of each clamping roller is interlocked and connected by a link having a universal joint so that the forward and backward movements of the rollers by contacting the outer periphery of a tree trunk are all synchronized with each other.