JPH0337387Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to the main body frame structure of a pruning machine.

(b) Conventional technology Conventionally, the frame of a pruning machine consists of a main frame and an auxiliary frame, and the main frame is equipped with an engine, and each has a driving wheel driven by the engine and a chain saw for pruning. Additionally, auxiliary wheels are attached to the auxiliary frame for free rotation.

When in use, the main frame and the auxiliary frame are connected with a spring so that they face each other with the trunk to be pruned interposed between them, and the driving wheels and auxiliary wheels are driven by being pressed against the same trunk. ,
This machine spirally moves up and down along the circumference of the trunk, and at the same time a chain saw is also driven to perform pruning work.

Furthermore, the main frame and the auxiliary frame are configured to be able to adjust their proximity and separation from each other, so that the drive wheels and auxiliary wheels can reliably clamp the trunk according to the diameter of the trunk, allowing smooth pruning work. That's what I do.

(c) Problems to be solved by the invention However, in the case of the above structure, it takes time and effort to adjust the proximity and separation of the main frame and the auxiliary frame, making it difficult to pruning a large number of trunks within a limited time. This caused problems in terms of work efficiency.

In other words, the above-mentioned frame connection work involves holding the main body frame, which is relatively heavy due to its engine etc., upright in a state in which the driving wheels are in contact with the circumferential surface of the trunk, and then holding the trunk in this state. Because this is done by interposing a spring with a predetermined biasing force between the end of the auxiliary frame that is close to the main frame and the end of the main frame, it is not necessary to set the pruning machine itself on each trunk. Even though it is hard work, the work of setting a large number of trunks one after another is not only time consuming but also physically tiring for the worker.

(d) Means for solving the problem Therefore, in the present invention, the left and right auxiliary wheels are attached to the inside and outside of the machine frame that supports the left and right drive wheels driven by the engine and the chain saw for pruning, so as to face the drive wheels. It can be installed to freely adjust its rotational position.
By operating the auxiliary wheels, the trunk can be squeezed together with the left and right drive wheels, and the machine can be spirally raised along the circumferential surface of the trunk using the same wheels. In the body frame structure of a pruning machine that enables pruning work with a chain saw, the body frame has upper, left and right frame pipes extending in the front and back direction and facing each other at a constant interval. In addition to horizontally suspending the upper and lower horizontal frames between the center portions of the frame pipe and the lower left and right frame pipes,
Left and right vertical frames are interposed between the center portions of the upper and lower frame pipes on the left and the upper and lower frame pipes on the right to form a framework, and the front ends of each of the upper, lower, left and right frame pipes are provided with vertically opposed U-shaped support brackets. is provided to protrude in the anterolateral direction, and left and right vertical support shafts are mounted between the vertically opposing brackets, and the base ends of the wheel support arms are rotated via bosses at the upper and lower ends of the vertical support shafts. In addition to freely pivoting, an auxiliary wheel is attached to the front end of each arm via a support rod so that the wheel can rotate freely and in an inclined manner, and the wheel can be rotated inwardly back and forth through the wheel support arm. A longitudinal longitudinal inner cylinder is slidably inserted into the upper, lower, left and right side frame pipes, and a tension spring is interposed between the tip of the inner cylinder and the middle part of the wheel support arm.
By grasping the handle provided at the rear end of the inner cylinder and sliding the inner cylinder back and forth, the support arm can be rotated back and forth. A large number of locking grooves are cut in the horizontal direction perpendicular to the center line direction of the inner cylinder, and an inner cylinder stopper claw is attached to the rear upper surface of the frame pipe so that it can be raised and lowered to project inward. By locking the pawl in a required locking groove, the inner cylinder can be fixed, and furthermore, the inner cylinder stopper pawl is always urged to protrude inward of the frame pipe, while locking. The groove is formed to engage with the pawl in order to restrict the forward sliding of the inner cylinder, and by rotating the inner cylinder by a quarter of a turn using the handle, the pawl and the locking groove can be easily engaged. It is an object of the present invention to provide a body frame structure for a pruning machine, characterized in that it is configured to be disengaged from the pruning machine.

(E) Action When attaching the pruning machine to the trunk, the operator stands behind the pruning machine, grasps each handle, and moves the inner cylinder of each frame pipe, which is formed by extending in the front-rear direction, to the rear (toward the front). side) and slide it.
By rotating each support arm inward,
If each auxiliary wheel is brought into pressure contact with the circumferential surface of the trunk, and the auxiliary wheels and the drive wheel are used to pinch the trunk from the front, back, left, and right directions, and then the inner cylinder stopper pawl is locked in the locking groove, the same result can be achieved. The inner cylinder is fixed, and each auxiliary wheel can be reliably held in pressure contact with the trunk by the urging force of a tension spring.

Moreover, when releasing the pressure contact of the auxiliary wheel to the trunk, it is sufficient to follow the procedure opposite to the above.

(F) Effect According to the present invention, by adjusting the internal and external rotational positions of the left and right auxiliary wheels, the machine can be quickly and easily moved from one direction of the trunk regardless of the diameter of the trunk. Since it can be attached and detached, operability is improved and work efficiency is significantly improved.

Moreover, since the overall structure of the machine frame can be simplified, the weight can be reduced, making it much easier to carry the machine into mountainous areas and to attach and detach the machine to the trunk as described above. This has the effect of greatly reducing physical and mental fatigue of the worker.

Further, since the forward and backward rotation operation of the auxiliary wheel can be easily performed by manual operation, the work of attaching and detaching the machine can be performed easily from this point of view as well, and the work efficiency can be improved.

Furthermore, since the structure is simple, the manufacturing cost of the device can be reduced.

(G) Example The example of the present invention will be explained in detail based on the drawings.
1 and 2 show a side view and a plan view of the pruning machine A according to the present invention performing pruning work on the trunk B, in which 1 is the body frame, 2 is the engine, 3, 3 ', 4, 4' are vertical and horizontal drive wheels;
5, 5', 6, and 6' are vertical and horizontal auxiliary wheels, and 25 is a chainsaw for pruning.

The fuselage frame 1 has upper, lower, left and right frame pipes 7, 7, 8, 8 facing each other at a constant interval,
Upper and lower horizontal frames 9, 9 are horizontally suspended between the center portions of the upper left and right frame pipes 7, 8 and the lower left and right frame pipes 7, 8, respectively, and the left upper and lower frame pipes 7, 7 and the right upper and lower frame pipes 8,8
A framework is constructed by interposing left and right vertical frames 10, 10 between the central portions of the frame.

The above-mentioned engine 2 has an upper horizontal frame 9
is installed on the back side of the unit via a connection and transmission mechanism 11,
In addition, the above-mentioned vertical and horizontal auxiliary wheels 5, 5', 6,
6' is the upper, lower, left and right side frame pipes 7, 7, 8,
8 via support rods 12, 12, 12, 12, respectively, in an inclined manner, and the wheels 5, 5', 6, 6' are configured to be driven by the engine 2.

In addition, each upper, lower, left and right side frame pipe 7, 7,
U-shaped support brackets 13, 13, 13, 13 are provided at the front ends of the brackets 8, 8, respectively, projecting in the anterolateral direction.
Left and right vertical support shafts 14, 14 are mounted between them, and wheel support arms 15,
The proximal ends of the arms 15, 16, and 16 are rotatably supported via the bosses 14a, 14a, and each arm 15,
Auxiliary wheels 5, 5', 6,
The wheels 5, 6' are freely rotatable and installed in an inclined manner through the support rods 17, 17, 17, 17.
5', 6, 6' are the wheel support arms 15, 15,
16, 16, the forward and backward rotational position can be freely adjusted inward.

The operation mechanism for adjusting the rotational position of the auxiliary wheels 5, 5, 6, and 6 is as follows.

That is, a longitudinal longitudinal inner cylinder 19 is slidably inserted into the upper, lower, left, and right frame pipes, and a tension spring 20 is interposed between the tip of the inner cylinder 19 and the midway part of the wheel support arm. By gripping a handle 21 provided at the rear end of the cylinder 19 and sliding the inner cylinder 19 back and forth, the support arm can be rotated back and forth.

Moreover, a locking groove 2 is formed on the upper peripheral surface of the rear end of the inner cylinder 19 in a lateral direction perpendicular to the center line direction of the inner cylinder 19.
In addition, an inner cylinder stopper pawl 23 is attached to the upper surface of the rear part of the frame pipe so as to be able to rise and fall freely so as to protrude inward from the frame pipe, and the pawl 23 is engaged with a required locking groove 22. By stopping the inner cylinder 19
It is configured so that it can be fixed.

Further, the inner cylinder stopper pawl 23 is always urged to protrude inward of the frame pipe,
Further, the locking groove 22 is configured to engage with the pawl 23 in order to restrict forward sliding of the inner cylinder 19,
If the inner cylinder 19 is rotated a quarter of a turn via the handle 21, the pawl 23 and the locking groove 22 can be easily disengaged from each other.

Reference numeral 24 denotes an arm return spring, which maintains a constant angle between the wheel support arm and the support bracket.

26 and 27 are first and second vertical support rods.

Therefore, when attaching pruning machine A to trunk B, the operator must stand behind pruning machine A and adjust each adjustment mechanism 1.
By releasing the locked state between the inner cylinder stopper pawl 23 of No. 8 and the locking groove 22 and sliding the inner cylinder 19 forward, the tensile biasing force by the tension spring 20 is weakened as much as possible. Each wheel support arm is rotated outward by the biasing force of the arm return spring 24, so that the opposing upper and lower left and right arms are opened at a wide angle.

Then, the pruning machine A is placed so that the lower part of the trunk B is located between the frame pipes on the left and right sides of the opening.
At the same time, with each drive wheel in contact with the peripheral surface of trunk B, each inner cylinder 19 is pulled and slid rearward, that is, toward the front, via the handle 21, and each support arm is moved inward. By rotating each auxiliary wheel to the circumferential surface of the trunk B, the auxiliary wheels and the drive wheel clamp the trunk B from the front, rear, left, and right directions, and then the inner cylinder stopper pawl 23 is inserted into the locking groove. 22, the inner cylinder 19 is fixed, and the auxiliary wheel is held in pressure contact with the trunk B by the biasing force of the tension spring 20.

Thereafter, by driving the driving wheels 3, 3', 4, 4' mounted in an inclined manner by the engine 2, the pruning machine A is operated together with the auxiliary wheels 5, 5', 6, 6' which are also inclined. What is necessary is to move the tree spirally upward along the circumferential surface of the trunk B and simultaneously drive the chain saw 25 to perform pruning.

In the end, the pruning machine A of the present invention performs the mounting operation on the trunk B from behind the pruning machine A as described above, and can quickly carry out all the mounting operations regardless of the diameter of the trunk B. Moreover, it can be easily performed.

The chain saw 25 is installed vertically on the upper horizontal frame 9 via a support frame 26, and has a chain 29 wound around the outer periphery of a main body 28 having a substantially elliptical shape in the upper and lower longitudinal directions, and the chain 29 is interlocked with the engine 2. The branch B that interferes with the chain 29 as the machine turns and rises by being rotated by the connected drive gear part 30.
-1 is configured to cut.

Further, 31 is a chain saw jamming prevention device,
In this device 31, the base of a jamming prevention body 32 formed in a substantially fan shape is pivotally supported 34 on the upper end of the main body 28 of a chain saw 25, and a roller is attached to one side end of the upper part of the jamming prevention body 32. 33 is attached so that it can rotate freely, and the upper peripheral edge of the roller 33 is attached to the chain saw body 28.
The roller 33 is configured to be located above the chain 29 located at the upper end, and interferes with the branch B-1 before the chain 29, lifts the branch B-1, and lifts the branch B-1. 1 is prevented from being bitten by the chain saw 25.

Therefore, overload on the engine 2 due to the branch B-1 being caught in the chain saw 25 can be avoided.

[Brief explanation of the drawing]

FIG. 1 is a side view of a pruning machine according to the present invention, FIG. 2 is a plan view of the same pruning machine, and FIG. 3 is a plan rear view of a chain saw. A: Branching machine, 1: Body frame, 2: Engine, 3, 3', 4, 4': Vertical and horizontal drive wheels, 5,
5', 6, 6': Upper, lower, left and right auxiliary wheels, 7, 8: Frame pipe, 18: Adjustment mechanism, 25: Chain saw.

Claims (1)

[Scope of claim for utility model registration] Engine-driven left and right drive wheels 3, 3', 4,
Left and right auxiliary wheels 5, 5', 6, 6' are mounted on the body frame 1 supporting the chain saw 25 for pruning, and the left and right auxiliary wheels 5, 5', 6, 6' are moved inwardly and outwardly to face the driving wheels 3, 3', 4, 4'. It is attached so that its rotational position can be adjusted freely, and by operating the auxiliary wheels 5, 5', 6, 6', the trunk B is squeezed together with the left and right drive wheels 3, 3', 4, 4', and a body frame structure of a pruning machine configured so that the machine can be spirally turned upward along the circumferential surface of the trunk B using the same wheels, so that pruning work can be performed using a chain saw 25. In the fuselage frame 1, the upper, lower, left, and right frame pipes 7, 7, 8, and 8, which are extended in the front-rear direction, face each other at a constant interval, and the upper, left, and right frame pipes 7, 8 and the lower, left and right frame pipes 7. . 10 are interposed to form a framework, and at the front ends of the upper, lower, left and right frame pipes 7, 7, 8, 8, upper and lower U-shaped supporting brackets 13, 13, 13, 13 are respectively projected in the anterolateral direction. established,
The left and right vertical support shafts 14, 14 are mounted between the vertically opposing brackets 13, 13, and the vertical support shafts 14, 1
Wheel support arms 15, 15, 1 at each upper and lower end of 4
The base ends of the arms 15, 16 are rotatably supported via the bosses 14a, 14a, and each arm 15, 15,
Auxiliary wheels 5, 5', 6, 6' are attached to the front ends of the wheels 5, 5', 6, 6' freely rotatably and in an inclined manner via support rods 17, 17, 17, 17.
6, 6' are the wheel support arms 15, 15, 16,
The inner cylinder 19 is slidably inserted into the upper, lower, left and right side frame pipes, respectively, and the tip of the inner cylinder 19 and the midway part of the wheel support arm are freely adjusted. A tension spring 20 is interposed between the inner cylinder 19 and the handle 21 provided at the rear end of the inner cylinder 19 to be gripped and the inner cylinder 19 to be slid back and forth, thereby making it possible to rotate the support arm back and forth. Moreover, a locking groove 2 is provided on the upper peripheral surface of the adjustment portion of the inner cylinder 19 in a lateral direction perpendicular to the center line direction of the inner cylinder 19.
2 are carved in large numbers, and an inner cylinder stopper pawl 23 is attached to the upper surface of the rear part of the frame pipe so as to be able to rise and fall freely so as to project inward of the pipe, and the pawl 23 is locked in a required locking groove 22. By doing so, the inner cylinder 19
Further, the inner cylinder stopper pawl 23 is always urged to protrude inward of the frame pipe, while the locking groove 22 is designed to restrict forward sliding of the inner cylinder 19. formed to engage with the claw 23,
The pruning machine is characterized in that the claw 23 and the locking groove 22 are easily disengaged by rotating the inner cylinder 19 by a quarter turn through the handle 21. Airframe frame structure.