JPS61216624A - 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 (Technical Field of the Invention) The present invention relates to a branch cutting machine, and when a branch with a large cutting resistance hits the cutting part, the cutting part reduces the forward speed of the cutting part in the branch cutting direction, and This technique relates to a device for cutting slowly, and in particular, it is designed to ensure the above-mentioned deceleration even when the branch hits the cutting section at any height.

(Foreground of the Invention) A pruning machine consists of a main body equipped with wheels for lifting and lowering, and a cutting section loaded on the main body, and the above-mentioned wheels are linked by a power section to move up a standing tree. However, the cutting section is designed to cut the branches. However, since the cutting force of this type of cutting section is relatively small, it has been difficult or impossible to cut branches with high cutting resistance, such as thick branches or hard branches. One way to increase the cutting power of the cutting part and make it possible to cut thick or hard cuts is to use a higher horsepower engine, for example. The weight of the pruning machine itself increases, and the frame etc. need to be made stronger, so the weight of the pruning machine increases, and the output of the engine is taken up by the force of lifting the tree, making it difficult to cut the cutting part. The increase in cutting force cannot be expected to be that great. It is also conceivable to slow down the forward speed of the cutting part in the branch cutting direction and always cut slowly, but this would greatly reduce the efficiency of the pruning work and would be extremely disadvantageous in practice.

(Summary of the Invention) The present invention has been made in consideration of the above points, and an object of the present invention is to provide a pruning machine that can more reliably cut branches that have a large cutting resistance such as thick or hard branches. To provide a branch cutting machine capable of surely cutting a branch no matter what height position of the cutting part is hit by a technique having a large cutting resistance. To this end, the present invention disposes the cutting section so that it can freely rotate horizontally around a fulcrum, and also disposes a deceleration section in the transmission path from the power section to the lifting wheels, so that the cutting section is free from thick branches or hard materials. When the cutting section rotates horizontally due to contact with a branch with a large cutting resistance, the deceleration section is operated in conjunction with this, and the forward speed of the cutting section in the branch cutting direction is reduced. . With this configuration, even when a technique with high cutting resistance hits any height position of the cutting part, the cutting speed is reliably slowed down and the technique is cut slowly. It is.

(Example) Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is an exploded perspective view of the pruning machine according to the present invention, in which the pruning machine A has a main body part B for lifting and lowering that is detachably attached to a standing tree, and a main body part B that can be detachably attached to the main body part B. It consists of a rotating part C attached to the. The main body part B is equipped with a large number of lifting wheels W that rotate along the height direction of the tree, and when each wheel W is rotated by the engine 1 as a power unit loaded on the rotating part C, the main body part B rises vertically along the standing trees. Moreover, the rotating part C is detachably attached to the main body part B, and when the main body part B vertically ascends the tree, it rotates around the main body part B and protrudes from the surface of the tree by the cutting part 2. Cut the branch from its base. Reference numeral 3 denotes a cover plate, which is detachably mounted on the rotating part C, and is a cover plate which is cut by the cutting part 2 when the main branch cutting machine A cuts branches while climbing the tree. This prevents a technique that falls to the ground from falling into the rotating part C or the main body part B and causing these failures.

The main branching machine A uses an engine 1 on the side of the rotating part C to interlock each wheel W of the main body part B with the cutting part 2, and cuts branches while slowly moving vertically up the tree to achieve a predetermined cut. When the work is completed, it quickly descends vertically along the standing trees.

FIG. 2 is a perspective view of the main body B in a state where it is set on a tree T or removed from the tree T, and the main body B is
The main frame is annular frames F1, F2, and F3,
Various parts described below are attached to each frame Fl-F3. G1 is a large floating gear disposed at the top of the main body B, and teeth are formed on its outer and inner circumferential surfaces.When the pruning machine A moves up the tree T, the engine 1 As a result of this interlocking movement, it rotates in the direction of arrow X around the standing tree T and transmits forward rotation to each wheel W. Further, when the pruning machine A descends the tree T, it rotates in the direction of the arrow Y, and each wheel W rotates in the opposite direction. G2 is a fixed large gear located directly below the floating large gear G1, and has teeth formed on its outer peripheral surface.

The large gear G2 does not rotate in the XY directions like the large gear G1, but is fixed.

When the main body part B ascends the tree T, the rotating part C cuts the material T by the cutting part 2 while rotating along the large gear G2, and the gear G2 rotates along the large gear G2. This serves as a rotational guide orbit.

G3 is a large interlocking gear located directly above the frame F3 and having an arc shape surrounding the tree T. The large gear G3 is the wheel W
The three lifting wheel parts W to which are attached are simultaneously moved by the same amount in the direction of the center of the tree T or in the radial direction (outward) of the tree T, so that the tree T is always kept at the center of the main body part B. Niho ,,.

0 body part B, which has the function of
□When set on the tree T, the tree T is located at the center of each frame F1 to F3 and each gear 01 to G3.

The frame F1 is composed of a main frame Fla, a sub-frame, and a frame Fib. When setting the main body part B on the tree T or removing it from the tree T, the sub-frame Fi is opened as shown in FIG. Furthermore, an opening/closing plate 4 is attached to the frames F2, F3, and when the main body part B is set on or removed from the standing tree T, the opening/closing plate 4 is opened as shown in FIG. Board 4 is frame F2,
It also serves as a connecting member for F3, and connects frames F2 and F
3 is reinforced and solidified to prevent the frames F2 and F3 from being twisted or deformed.

In addition, each of the large gears G1 and G2 mentioned above also corresponds to the main gear G1a s G
2a and a sub gear GlbSG2b, one ends of the sub gears Glb and G2b are rotatably attached to one ends of the main gears Qla and G2a. However, when placing the main body part B on the standing tree T or removing it from the standing tree T, as shown in FIG.
After securing an opening through which the tree T can be passed through and positioning the tree T at the center of the main body part B, as shown in FIG.
, close G2b. 5.6.7.8.9 is a stop.

In the 1st m, 10 is a rising height setting part for setting the rising height of the pruning machine A.

gl is a small gear that meshes with the inside of the large gear G1, g3 is a bevel gear, and 14 is a chino, and the rotation of the engine 1 is transmitted to each wheel W via these gears glSg3, chino 14, etc. . In FIG. 1, 21 is a gasoline tank, 25 is a timing belt that transmits the rotation of the engine 1 to the saw chain 27 of the cutting section 2, and 30 is an interlocking box in which gears, which will be described later, are housed.

Further, 17 is a cam for pressing the wheel portion W toward the center of the tree T, SL is a biasing spring attached to the rotating shaft of the cam 17, and 19 is an operating handle for expanding each cam 17. be.

The cutting section 2 includes a base 40 and a substantially inverted frame 41 that protrudes above the base 40. 43.43
Reference numeral 44 indicates a roller pivotally attached to the upper part of the frame 41, and 44 a sprocket (see also FIG. 3), and the saw chain 27 is tied to these rollers 43, 43 and sprocket 44. 45 is a spline shaft that transmits rotation to the sprocket 44. A support frame 46 is disposed on the support frame 47 so as to be horizontally rotatable in the direction of the arrow eSd about a pin 59 serving as a fulcrum, and a box 48 is mounted on the support frame 46. 52 is a spring that elastically supports the support frame 46. The spline shaft 45 and the support rods 49, 50 of the base 40 which are parallel to the spline shaft 45 are mounted inside the box 48 so as to be movable back and forth in the radial direction r of the tree T. Reference numeral 51 denotes a plate to which the rear ends of each spline shaft 45 and support rod 49, 50 are attached.

Reference numeral D denotes a deceleration section consisting of a braking device, which includes a driven wheel 61, an interlocking wheel 62, a belt 63 tied to both wheels 61 and 62, a brake band 64 tied to the lower part of the driven wheel 61, etc. . 61a and 62a are rotating shafts of the driven wheel 61 and the interlocking wheel 62, respectively. 65 is a fixture at the rear end of the brake band 64. The tip of the brake band 64 is fixed to a pin 67 erected on the rotating plate 66. 68 is a rotating shaft at the rear end of the rotating plate 66. Rotating plate 6
The tip of 6 is resiliently supported by a spring 69. 70 is spring 6
This is the stopper number 9. Reference numeral 71 denotes a rod material attached to the tip of the rotary plate 66, and this rod material 71 is connected to a rod material 73 that is engaged with a stop portion 72 protruding from the support frame 46.

74 is a support for the rod material 74.

When the pruning machine A is moving up a tree, the interlocking wheel 62 is interlocked with the engine 1 and transmits its rotation to the driven wheel 61, and as will be described in detail later, due to the rotation of the driven wheel 61, the rotating portion C is rotated. The saw chain 27 rotates around the main body part B and cuts the tip with the saw chain 27. Here, the saw chain 27 is hit by a technique t with a large cutting resistance, and the cutting part 2 is pushed by this, and the support frame 4
6 horizontally rotates in the direction of the arrow d against the spring force of the spring 52 and moves backward, the rod 71 is pulled in the direction of the arrow p, the rotating plate 66 rotates in the direction of the arrow q, and the brake band 64 rotates in the direction of the arrow q. 61 is tightened, the rotational speed of the driven wheel 61 is reduced,
The forward speed of the rotating part C in the branch cutting direction decreases, and the branch t is slowly cut by the saw chain 27 of the cutting part 2.

4 and 5 are developed diagrams of the transmission system, and the transmission system will be explained next with reference to both figures.

g2 is a gear disposed between the gears g2 and g3, and the rotation of the engine 1 is transmitted to the wheels W via these gears g1 to g3 and the chino 14. 31.
33 is a transmission belt disposed between the engine 1 and the reduction unit, 32 is a reduction gear, and the rotation of the engine 1 is transmitted to the interlocking shaft 62 of the reduction unit via these belts 31, 33, etc. transmitted to. 34 is a friction clutch interposed in the transmission path.

g7 is a gear interlocked with the driven wheel 61, g9 and g
ll is a gear arranged on both sides of this gear g7. A gear glO that meshes with the large gear G2 is connected to the gear g9. G8 is a movable gear supported by the rotary rod 36, and when the pruning machine A moves up the tree T, it meshes with the gears g7 and g8 (see FIG. 4). That is, in this state, the rotation of the engine 1 transmitted to the gear g7 is
It is transmitted to gear glO via gears g8 and g9, and
The lO rolls along the large gear G2, and the rotating portion C rotates around the main body B in the direction of arrow X to cut the saw chain 27. At this time, the large gear G1 has a gear g whose rotation is prevented by the stopper 42.
12 are in mesh with each other, this gear G1 is pulled by gear g12 and rotates in the direction of arrow The pruning machine A moves up the standing tree T by rotating.

When the pruning machine A lowers the tree T, the gear g8 meshes with the gear g7 and the gear gll (see Fig. 5). In this state, the rotation of the engine 1 is not transmitted to the gear g9, and The stopper 42 is separated from the gear g12, and the pruning machine A moves down the tree T by its own weight. At this time, the gear G1 rotates in the direction of arrow Y as the wheel W rotates in the opposite direction. Note that in the above description, descriptions of parts unrelated to the present invention, such as the structural functions of the cam 17, etc., are omitted.

The main pruning machine A has the above-mentioned configuration, and when the engine 1 is interlocked, the wheels W rotate in the forward direction, and the pruning machine A moves up the standing tree T. Further, the rotating portion C rotates around the main body portion B in the direction indicated by the arrow in FIG. 3, and the saw chain 27 performs the cutting process.

Now, when the saw chain 27 is hit by a technique with a large cutting resistance such as a thick branch or a hard branch, the cutting part 2 is pushed by this, and the support frame 46 and box 48 are centered around the pin 59 as a fulcrum part in FIG. horizontally rotate in the direction of arrow d (see the chain line in the figure).

Then, the rod member 71 is pulled in the direction of arrow p, the brake band 64 is tightened to the driven wheel 61, and the rotational speed of the driven shaft 61 is reduced. Then, the rotational speed of the gears g7 to glO also decreases, and the rotating portion C slowly rotates around the main body portion B to slowly cut the branch t at a low speed. Once the branch t is cut, it horizontally rotates in the direction of arrow e due to the spring force of the support frame 46, box 48, and spring 52 and returns to its original position (see the solid line in Figure 3), and the brake band 64 is loosened. Then, the driven wheel 61 returns to a constant speed, and the rotating portion C rotates around the tree T along the main body portion B again at a predetermined speed. In this way, according to the present device, the saw chain 27 can be
When it hits, the deceleration part is operated in conjunction with the displacement of the cutting part 2, which is pushed by this and rotates horizontally and retreats, thereby decelerating the forward speed of the rotating part C in the branch cutting direction. Therefore, it is possible to slowly and reliably cut techniques with high cutting resistance.

Next, the features of this device will be explained in more detail with reference to FIG.

As shown in FIG. 3, among the branches that hit the cutting part 2, there are some branches t1 that hit a high part of the cutting part 2, and there are branches t2 that hit a low part of the cutting part 2. In order to reliably operate the deceleration part and cut the branch, it is necessary to horizontally rotate and retreat the cutting part 2 in the same or almost the same way, no matter what height the branch hits the cutting part 2. be. However, in this device,
The cutting section 2 is designed to horizontally rotate around the pin 59, and the distance from the pin 59 as a fulcrum is substantially always constant or approximately constant, so that the branch can be rotated horizontally at any height of the cutting section 2. Even when the cutting part 2 is hit by the branch, the rotational moment caused by the pushing of the cutting part 2 by the branch is substantially constant or approximately constant. This means that the magnitude of the rotational moment that the cutting section 2 receives is substantially unrelated to the height of the technique applied to it, and no matter what height position the cutting section 2 is hit with, the magnitude of the rotational moment applied to the cutting section 2 is
means that it always rotates horizontally in the same way and that the speed reduction section 2 is operated reliably.

The present invention is not limited to the above-mentioned embodiments (for example, although the deceleration section in the above embodiment is explained using a braking device using a brake band as an example, the deceleration section may be a device other than such a braking device). For example, when a friction clutch device is used and the cutting part is pushed by a branch and is displaced backwards, this friction clutch device is activated in conjunction with this to move the cutting part in the direction of cutting the branch. The forward speed may be reduced.

As described above, the present invention can be modified in various ways, and the present invention is not limited to the above embodiments.

(Effects of the Invention) As described above, the present invention provides a pruning machine A comprising a main body B provided with lifting wheels W and a cutting portion 2 provided with a saw chain 27, in which the cutting portion 2 is connected to the fulcrum portion 59. A deceleration section is disposed in the transmission path from the power section 1 to the wheels W, and the deceleration section is cut as described above.

Since it is operated in conjunction with the horizontal rotation of the cutting section 2, when a branch t with large cutting resistance, such as a thick or hard technique, hits the saw chain 27, the forward speed of the cutting section 2 in the branch cutting direction is reduced. It is possible to slow down and cut the technique t slowly and reliably, and in particular, the rotational moment of the cutting part 2 can be kept constant or almost constant no matter what height position the branch t hits the cutting part 2. Therefore, there is an effect that the reduction part can be operated reliably.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a perspective view of a pruning machine, Fig. 2 is a perspective view of the main body, Fig. 3 is a perspective view of the cutting part and reduction part, and Fig. The figure is a developed view of the transmission system of the pruning machine when the tree is raised, FIG. 5 is a developed view of the transmission system of the pruning machine when the tree is lowered, and FIG. 6 is a partial plan view.

Claims (1)

[Claims] In a pruning machine consisting of a main body part equipped with lifting wheels and a cutting part equipped with a saw chain, the cutting part is disposed horizontally rotatably around a fulcrum part, and a transmission path from the power part to the wheels is provided. A pruning machine characterized in that a deceleration part is provided, and the deceleration part is operated in conjunction with the horizontal rotation of the cutting part.