JPH11137040A - Pruning apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pruning apparatus capable of lightening the load on an operator and carrying out properly pruning even at vertically separated tea ridges, by equipping a pruning apparatus with a reaping blade to be driven by an engine attached to one end of an operating lever having a self-propelled traveling wheel at the tip. SOLUTION: This apparatus is the one for pruning the side of a tree such as a bush, etc., is equipped with a reaping blade 10 to be driven by a driving force from an engine 4 attached to one end of an operating lever 3 having a self-propelled traveling wheel 2 at the tip of operating lever. The reaping blade 10 is attached to the traveling wheel 2 in an inclinable way. In the pruning apparatus, the reaping blade 10 can change an inclination angle 6 by inclining an output shaft of the engine 4, a driving case and a reaping blade case 6 coaxially arranged on the output shaft together from the traveling wheel 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a pruning device, and more particularly, to a pruning device having a self-propelled structure.

[0002]

2. Description of the Related Art For example, a tree planted in a tea plantation, such as a tea plant or a plant, may be pruned by removing excess branches and leaves protruding from the side. As a device used for pruning, the driving force from the engine supported by the operating rod is transmitted to a clipper blade serving as a cutting blade attached to a gear case disposed on the tip side of the operating rod, There is one in which the branches are dropped by the reciprocating motion of the clipper blade. In such a pruning device, an operator grips a handle provided on an operating rod, and performs a pruning operation while, for example, positioning a hair clipper blade on a side surface of a tea plant.

[0003]

However, in such a pruning device, the operator has an operation handle attached to the operating rod so that the pruning operation can be performed while supporting the entire weight of the pruning device. Therefore, there is a concern that the burden on the worker may increase. In particular, when a pruning operation is performed on a tea ridge on a slope where the total weight is directly applied to the operator unlike a flat tea ridge, the burden on the operator becomes particularly large. Then, in order to reduce the labor at the time of the pruning action for the tea furrow on the slope, it is conceivable to provide a pair of clippers blades in the pruning device so as to face the side faces of the adjacent tea furrow. However, in this case, when the pruning operation is performed on the slope, the tea tree hem is vertically separated from the adjacent tea ridges. It is often difficult to mow each other in the same way. For this reason, it is the present situation that it is easy to be limited to the method which has a hair clipper blade facing one side of the tea tree as before. Moreover, when targeting one side of the tea tree, when the clippers blade supported by the operating rod is fixed at a predetermined angle, when trimming adjacent tea ridges,
The operator needs to tilt the operating rod so that the orientation of the clipper blade is aligned with the bottom of the tea plant. For this reason, a worker may have an increase in work load and a decrease in work efficiency due to a change in labor for supporting the pruning device between the tea ridges.

An object of the present invention is to reduce the burden on the worker and to reduce the burden on the operator in the vertical direction, in view of the problems in the conventional pruning device, particularly in the hemming operation on an inclined ground. An object of the present invention is to provide a pruning device having a configuration that can properly cut a hem.

[0005]

To achieve this object, an invention according to claim 1 is an apparatus for pruning the side of a tree, such as planting, which has a self-propelled running wheel at the tip. A cutting blade driven by a driving force from an engine mounted on the other end of the rod is provided, and the cutting blade is provided so as to be tiltable with respect to the running wheel.

According to a second aspect of the present invention, in the pruning device according to the first aspect, the cutting blade comprises a drive case and a cutting blade case arranged coaxially with an output shaft of the engine. The tilt angle is changed by being tilted with respect to the wheel.

According to a third aspect of the present invention, in the pruning device of the first aspect, the cutting blade and the engine are swingably supported by the operating rod via a vibration isolating member. It is characterized by:

According to a fourth aspect of the present invention, in the pruning device according to any one of the first to third aspects, the cutting blade is held in a tilting position by frictionally engaging the operating rod. It is characterized in that it is configured to be.

[0009]

According to the first, second and fourth aspects of the present invention, the cutting blade can be tilted with respect to the running wheel and frictionally engaged with the operating rod by a simple operation such that the cutting blade is attached to the skirt of the ridge. Can be opposed to each other. Moreover, since the drive case together with the cutting blade case can be tilted together with respect to the traveling wheels, it is not necessary to perform an operation of adjusting the drive structure for the cutting blade when tilted. Thus, the operator can perform the operation of lowering the bottom of the tea ridges by a simple operation of simply adjusting the tilt angle of the cutting blade.

According to the third aspect of the present invention, since the vibration isolating member is disposed between the engine and the operating rod, transmission of vibration to the worker can be prevented, and fatigue of the worker can be reduced. .

[0011]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a perspective view showing the entire configuration of a pruning device according to an embodiment of the present invention. In FIG. 1, the pruning device 1 has an operating rod 3 at the tip of which a running wheel 2 is pivotally supported. At the base end of the operating rod 3, as will be described later in detail, the drive case 5 and the cutting blade case 6 are coaxial with the output shaft of the engine 4.
Is attached.

As shown in FIG. 2, the drive case 5 is fastened to the output shaft case 4A of the engine 4 by bolts 5A, and the cutting blade case 6 is fastened to the drive case 5 by bolts 6A. Has been installed. The mounting portions of the drive case 5 and the cutting blade case 6 are both set at the same fastening position, so that the cutting blade case 6 can be directly fastened to the output shaft case 4A of the engine 4.

In FIG. 2, the drive case 5 includes the operating rod 3.
A support plate 27 to be described later is provided on the base side (only a part is shown).
(See FIG. 4), and an intermediate transmission shaft 7 is supported by bearings 8 and 9 inside. Note that FIG.
1 shows a configuration excluding the support plate 27. The intermediate transmission shaft 7 has a traveling wheel 2 and a cutting blade 10 described later.
Is provided. That is,
The driving force transmission mechanism is mounted on a clutch case 11 attached to one end of the intermediate transmission shaft 7 in the axial direction, a bevel gear 12 integrated with the intermediate transmission shaft, and the other end of the intermediate transmission shaft 7 in the axial direction. It is composed of a connecting member 13.
The clutch case 11 forms one of a centrifugal clutch constituted by the output shaft side of the engine 4 and the bevel gear 12 is integrated with one end in the axial direction of a traveling wheel drive transmission shaft 14 composed of a flexible shaft. A gear group is formed by meshing with the gear 15.

The connecting member 13 is formed of a disk member fastened to the intermediate transmission shaft 7, and has a plurality of engaging pins 16 projecting toward the cutting blade case 6 in the circumferential direction. The connecting member 13 is capable of interlocking a cutting blade driving gear 17 disposed in the cutting blade case 6 via an engaging pin 16. That is, the clutch case 18 is integrated with the support shaft 17A of the cutting blade driving gear 17 at the end facing the connecting member 13, and the engaging pin 16 is inserted through the clutch case 18 to thereby transmit the intermediate transmission shaft. 7
Can be linked to.

In FIG. 2, a transmission shaft 14 for driving the running wheels is
One end in the axial direction, that is, the end on the base side of the operating rod 3 is a bevel gear 1
The other end in the axial direction, that is, the end on the distal end side of the operating rod 3 is extended into the traveling wheel gear case 19 as shown in FIG. In FIG. 3, a drive-side gear 20 connected to an end of the drive wheel drive transmission shaft 14 is disposed inside the drive wheel gear case 19.
The drive side gear 20 has an axle 2A for supporting the traveling wheels 2.
The driven side gear 21 integrated with the gear is engaged.
The drive-side gear 20 and the driven-side gear 21 reduce the rotation from the engine 4 to reduce the speed of the traveling wheels 2 corresponding to the walking speed of the worker.
The hypoid gear which can be set to the number of rotations is used. The traveling wheel drive transmission shaft 14 is not limited to a flexible shaft, but may be connected between the drive case 5 and the traveling wheel gear case 19 via a universal joint.

The axle 2A of the traveling wheel 2 is rotatably supported by a bearing 22 mounted on the traveling wheel gear case 19, and is located at a position near one axial end thereof via a one-way clutch 23. Is attached. The one-way clutch 23 is provided to allow only rotation in the forward direction as the rotation direction of the traveling wheel 2. That is, a case where the pruning device 1 is advanced by the rotation of the traveling wheel 2 via the traveling wheel drive transmission shaft 14 by the driving force from the engine 4 and the manual pushing operation of the operator without using the driving force from the engine 4. Each of the running wheels 2 is allowed to rotate. The one-way clutch 23 transmits the driving force from the engine 4 transmitted to the axle 2A to the traveling wheel 2, while the one-way clutch 23 drives the driving gear 20 when the traveling wheel 2 is turned to the driving side by the manual operation of the operator. Without rotating the axle 2 </ b> A by meshing with the driven gear 21.
It is designed to idle only.

As shown in FIGS. 1 and 4, an engine 4 for generating a driving force for the traveling wheels 2 has a driving case 5
The output is controlled by a throttle lever 25 attached to an operation handle 24 provided in the controller. The engine 4 increases the driving force as the throttle opening of the engine 4 is increased by operating the throttle lever 25 when rotating the traveling wheel 2 and when driving the cutting blade 10. .
In the present embodiment, as shown in FIGS.
The operation handle 24 is swingably supported via a detachable chrysanthemum seat 30 provided at the upper end of the chrysanthemum seat 30. By operating the operation lever 31 to release the engagement of the chrysanthemum seat 30,
In FIG. 1, the operation handle 24 can be swung up and down, so that the operation handle 24 can be set at an angle that is easy for the operator to grasp.

The cutting blade 10 is constituted by a clipper blade having a well-known structure, and its base end is disposed in the cutting blade case 6. As disclosed in the specification of Japanese Patent Application No. 5-290242 previously proposed by the present applicant, the inside of the cutting blade case 6 is attached to a rotating shaft having a gear meshing with the cutting blade driving gear 17. There is provided a configuration in which a reciprocating blade constituting a hair clipper blade is provided so as to be interlocked with the cam shaft.

A leaf receiving plate 26 is provided near the cutting blade 10 as shown in FIGS. 1 and 4, and the leaf receiving plate 26 is used to remove tea leaves, branches and the like cut by the cutting blade 10. It is designed to catch and drop on the ground when pruning debris is cut off.

On the other hand, the drive case 5 in which the engine 4 and the cutting blade case 4 are provided on the same axis, as shown in FIG.
The support plate 27 is supported so as to be tiltable with respect to the operation rod 3. As shown in FIG. 5, the support plate 27 includes a plurality of plate members 27 divided between the drive case 5 and the operating rod 3.
A and 27B are provided, and a vibration isolating member 28 such as a vibration isolating rubber is interposed at the divided position, and a plate member 27A of the plate member located on the operation rod 3 side is supported via a fulcrum rod 27C. And is hinged to the operating rod 3.

As shown in FIG. 4, a long hole 29 having an arc-shaped locus centered on a fulcrum rod 27C is provided on the swinging end side of the cutting blade 10 which is tiltably supported by the support plate 27.
A bracket 29 in which the bracket A is formed is fixed, and a screw screwed into a nut (not shown) fixed to the operating rod 3 in a state where the bracket 29 is sandwiched therein is fixed in an elongated hole 29A of the bracket 29. The shaft 32 is inserted. As shown in FIG. 6, the screw shaft 32 can be screwed into a female screw formed on the operating rod 3, and has a head 32 </ b> A at one axial end for preventing the bracket 29 from coming out of the long hole 29 </ b> A. An adjusting lever 34 is fixed to the other end in the axial direction via an elastic body 33 such as a spring disposed between the operating lever 3 and the operating lever 3. By changing the pressing force of the head 32A against the bracket 29 in accordance with the amount of rotation of the adjusting lever 34, the screw shaft 32 allows the cutting blade 10 and the operating rod 3 to frictionally engage and disengage from each other. In this case, the bracket 29 can move freely, and when tightened, the movement of the bracket 29 is restricted. For this reason, the adjustment lever 3
4, the bracket 29 can move freely when the screw shaft 32 is loosened, so that the cutting blade 10 uses the fulcrum rod 27C of the support plate 27 as a fulcrum.
In this case, the blade 10 can be tilted so as to change the angle with respect to the traveling wheel 2 indicated by the symbol θ, and the movement of the bracket 29 is restricted when the blade is tightened. Can be held.

Since the present embodiment has the above configuration,
When the cutting blade case 6 is fastened and attached to the output shaft case 4A of the engine 4, the fastening is released, the drive case 5 is fastened to the output shaft case 4A of the engine 4, and then the cutting blade case 6 To the drive case 5, the self-propelled pruning device 1 can be configured. As described above, the combination of the engine 4 and the cutting blade case 6 has the structure of the conventional pruning device. It can be reconfigured as a self-propelled pruning device.
When the drive case 5 is fastened to the output shaft case 4A and the cutting blade case 6 of the engine 4, the clutch case 11 of the intermediate transmission shaft 7 forms a centrifugal clutch with the engine output shaft side, and the bevel gear 12 runs. The meshing relationship with the bevel gear 15 of the wheel drive transmission shaft 14 is set, and the engaging pin 16 of the connecting member 13 is engaged with the clutch case 18 of the cutting blade driving gear 17 on the cutting blade case 6 side. Set in relationship. In addition, inside the cutting blade case 6, the cutting blade driving gear 17 and the cutting blade 10 can be linked.

The pruning device 1 is selected between a case in which the pruning operation is performed while traveling by itself and a case in which only the traveling is performed by the hand of the operator. That is, in the case of self-running, the output of the engine 4 is increased by operating the throttle lever 25 provided on the operation handle 24, and the centrifugal force acting on the clutch case 11 provided on the intermediate transmission shaft 7 in the drive case 5 in response thereto. As the force increases, the intermediate transmission shaft 7 starts rotating.
When the intermediate transmission shaft 7 rotates, the rotation is transmitted to the traveling wheel drive transmission shaft 14 via bevel gears 12 and 15, and the drive side gear 20 and the driven side gear 21 disposed in the traveling wheel gear case 19 are rotated. The traveling wheel 2 rotates, and the rotation is transmitted to the traveling wheel 2 via the one-way clutch 23, and the traveling wheel 2 rotates. In addition, since the coupling member 13 and the clutch case 18 in the cutting blade case 6 rotate in conjunction with the rotation of the intermediate transmission shaft 7, the driving force from the engine 4 is applied to the cutting blade driving gear 17 in the cutting blade case 6. The force is transmitted, and the reciprocating motion of the cutting blade 10 is performed.

On the other hand, when the operation of the throttle lever 25 is not performed or the engine 4 is stopped, the centrifugal clutch constituted by the output shaft side of the engine 4 and the clutch case 11 on the drive case 5 side is engaged. Since the centrifugal force required to set the interlocking relationship does not act, the state in which the traveling wheel drive transmission shaft 14 does not rotate is maintained. For this reason, the traveling wheel 2 can idle in the forward direction by the manual operation of the operator via the one-way clutch 23, so that, for example, the labor for unloading and lifting the pruning device 1 with respect to the truck can be reduced. Has become.

The self-propelled pruning device 1 can change the tilt angle of the cutting blade 10 with respect to the traveling wheel 2. That is, to change the tilt angle, the adjustment lever 34
Is operated to loosen the screw shaft 32 and the cutting blade 1 for the operating rod 3
0 frictional engagement is released. Thereby, the bracket 29
Can freely move, the drive case 5 is tilted with the fulcrum rod 27C provided on the support plate 27 as a fulcrum,
The cutting blade 6 is tilted in a state in which the cutting blade case 6 and the engine 4 are put together, and the cutting blade 10 is tilted at an angle at which the cutting blade 10 can be opposed to the skirt portion of the ridge to be cut. FIG. 7 is a diagram showing a case in which the tilting angle is changed. In FIG. 7, in a case where the hemming is performed on the tea ridges C1 and C2 which are vertically adjacent to each other on the slope, the setting is performed at the time of hemming with the upper tea ridge C1. Angle θ of the cutting blade 10
1, the angle (θ2) can be changed to an angle (θ2) suitable for trimming the lower ridge C2. When the tilt angle is changed as described above, the screw shaft 32 is tightened by operating the adjustment lever 34, so that the screw shaft 3 in FIG.
Since the second head 32A is pressed against the bracket 29 to be in a frictional engagement state, the movement of the bracket 29 is restricted, and the tilt angle of the drive case 5 is held in a fixed state.
The tilt angle of the cutting blade 10 is maintained.

[0026]

As described above, according to the first, second and fourth aspects of the present invention, the cutting blade can be simply tilted with respect to the traveling wheel and frictionally engaged with the operating rod. The cutting blade can be made to face the skirt of the tea ridge by the operation. Moreover, since the drive case together with the cutting blade case can be tilted together with respect to the traveling wheels, there is no need to perform an operation of adjusting the drive structure for the cutting blade when tilted. This allows the operator to perform the hem dropping operation between the tea ridges with a simple operation simply by adjusting the tilt angle of the cutting blade, thereby reducing the labor for the operator and optimally setting the cutting blade for the tea ridge. It is possible to easily set the facing relationship.

According to the third aspect of the present invention, since the vibration isolating member is disposed between the engine and the operating rod, transmission of vibration to the worker is prevented, and fatigue of the worker is reduced. Can be.

[Brief description of the drawings]

FIG. 1 is a perspective view illustrating an entire configuration of a pruning device according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view for explaining a structure of a drive unit used in the pruning device shown in FIG.

FIG. 3 is a cross-sectional view for explaining a configuration of a driving unit of a traveling wheel in the pruning device shown in FIG.

FIG. 4 is a rear view of the pruning device shown in FIG. 1;

FIG. 5 is a side view of the pruning device shown in FIG. 1;

FIG. 6 is a sectional view showing a part of a tilting mechanism of a cutting blade used in the pruning device shown in FIG. 1;

FIG. 7 is a view for explaining a use state of the pruning device shown in FIG. 1;

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Pruning device 2 Running wheel 3 Operating rod 4 Engine 5 Drive case 6 Cutting blade case 7 Intermediate transmission shaft 10 Cutting blade 11, 18 Clutch case 12, 15 Bevel gear which forms a gear group 13 Connecting member 19 Gear case for running wheels 23 One Direction clutch 24 Operation handle 25 Throttle lever 27 Support plate having a fulcrum of cutting blade 27C Support rod 28 Vibration isolator 29 Bracket 32 Screw shaft 32A Head of screw shaft for frictionally engaging bracket and operation rod 34 Adjustment lever

Claims (4)

[Claims] 1. An apparatus for pruning the side of a tree, such as planting, which is driven by a driving force from an engine mounted on the other end of an operating rod having a self-propelled traveling wheel at its tip. A pruning device comprising a blade, wherein the cutting blade is provided so as to be tiltable with respect to the traveling wheel. 2. The pruning device according to claim 1, wherein the cutting blade is tilted with respect to the traveling wheel by a driving case and a cutting blade case arranged coaxially with an output shaft of the engine. A pruning device characterized in that the inclination angle is changed by the operation. 3. The pruning device according to claim 1, wherein the cutting blade and the engine are swingably supported by the operating rod via a vibration isolating member. Branch equipment. 4. The pruning device according to claim 1, wherein the cutting blade is held in a tilted position by frictionally engaging the operating rod. A pruning device.