JPH036185Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention is a self-lifting branch that is equipped with a manual starter pull-start engine and can automatically perform pruning work using the power of the engine. This invention relates to the improvement of the starter screw of an engine in a striking machine.

(Prior art) This type of pruning machine uses a suitable number of drive wheels and floating wheels to elastically hold the periphery of the tree trunk, and uses the power of a manual starter pull-start engine. While the drive wheels are driven to raise the tree above the trunk, a chain saw mounted in an upright position is rotated relative to the trunk to cut off branches on the way up.

By the way, since the engine is started by pulling the wire that is unwound and housed in the recoil starter with a certain unwinding force using a manual starter hook, this starter hook has an easy-to-grip shape. In other words, it had a T-shape when viewed from the front with a constant wall thickness.

Therefore, after attaching this machine to the base of the trunk of a tree, pull the starter hook, start the engine, raise it against the trunk, and perform pruning work when the chainsaw gets caught in the branch. When the engine stalls, the operator holds the operating rod 13 and lifts it from the ground to the forked hook portion 13a at the tip (see Figure 3).
was hooked to this manual starter hook and pulled to restart the engine.

However, the forked hook portion 13a of the operating rod 13
In order to make it easier to hook to a certain extent, the forked hook is formed with a spacing that is greater than the wall thickness of the manual starter hook, so this fork hook has to be hooked only from the front side of this starter hook.
This hooking work required a great deal of effort and time.

(Purpose of the invention) An object of the invention is to provide a starter hook for a pruning machine engine that allows the bifurcated hook portion of the operating rod to be hooked from any direction.

(Summary of the invention) The present invention provides an appropriate number of wheels that can be elastically held around the trunk of a tree, and uses the power of an engine with a manual starter pull-start system installed on the trunk of a tree to move at least one wheel or more. In this pruning machine, a chain saw is driven to raise the branch relative to the trunk, while an equipped chain saw is rotated relative to the trunk to cut the branch on the way up. By connecting the bulging-shaped emergency starter hook with a string-like body, the bifurcated hook part of the operating rod can be hooked to the emergency starter hook regardless of the direction, and the engine stalled during pruning work can be prevented. This makes it possible to restart the engine easily and quickly.

(Example) In order to explain the present invention in more detail, the present invention will be described below based on the drawings.

First, the general structure of this pruning machine is as follows: With a predetermined ascending lead angle α, a winding frame 3, also equipped with idler wheels 4, is opened and closed in one direction with respect to a main frame 1, which is equipped with an appropriate number of drive wheels 2. While the upper and lower ends are pivotably connected to each other using a pivot pin 5, a removable tension spring 6 is installed between each upper and lower floating other end, and the other floating ends are pulled closer to each other to move these wheels 2 together. , 4 are configured to be able to elastically abut and hold the periphery of the trunk 7.
Therefore, by engaging and disengaging the tension spring 6, it becomes possible to attach and detach the machine from the base of the tree trunk 7, and also,
Since the wheels 2 and 4 come into elastic contact with the periphery of the trunk 7 during this installation, changes in the diameter of the trunk 7 can be accommodated.

Further, a transmission case 9 is attached to the main frame 1, in which an engine 8 is integrally fixed and a chain saw 10 is mounted in an upright manner, and the driving wheels 2 are connected to this case 9. and,
The power of the engine 8 is suitably reduced in speed within the case 9, and is transmitted to the drive wheels 2 as well as to the chain saw 10.

As the engine 8, a conventional structure with a manual starter hook 8a and a tension starting method is used, and a wire (not shown) is retracted and housed in a recoil starter 8b with a constant unwinding force. by pulling it with the manual starter hook 8a attached to the outer end of the engine 8.
is now possible to start. As the manual starter hook 8a, a conventional one having an easy-to-grip shape, such as a T-shape in front view with a constant wall thickness, as shown in this embodiment, is used.

By the way, an emergency starter hook 11 having a bulging shape that can be hooked in all directions is connected to this manual starter hook 8a by a string-like body 12.

The emergency starter hook 11 is the aforementioned operating rod 1.
3. The bifurcated hook portion 13a at the tip has a bulging shape that can be hooked from all directions, for example,
It has a spherical shape, a broken sphere shape, a truncated cone shape, a rugby ball shape, etc., and one end of a string-like body 12 is connected to the center of the shape by an appropriate means.

The string-like body 12 is preferably a flexible material such as a string or a wire, and its diameter must be smaller than the distance between the forked hooks 13a at the point where it is hooked on the emergency starter hook 11. Not even.
It should be noted that the manual starter hook 8a and the emergency starter hook 11 are connected with at least a gap sufficient to allow the forked hook portion 13a of the operating rod 13 to be easily inserted.

Therefore, when the machine stalls during pruning work, the operator must hold the base of the operating rod 13 from the ground and insert the string-like body 12 between the two prongs of the forked hook portion 13a at the tip. By lowering this operating rod 13 slightly downward, the emergency starter switch 11 is activated.
The emergency starter hook 1 caught on this hook.
1 further downward, the manual starter hook 8a is pulled, making it possible to restart the engine 8.

In addition, this pruning machine has a preset dial 14.
A forward/reverse switching mechanism 14 is provided which automatically switches the drive wheels 2 from normal rotation to reverse rotation and lowers them spirally when the drive wheels 2 rise by the desired distance set in step a.

(Effects) As is clear from the above description, the present invention provides an emergency starter hook 11 which has a bulging shape that can be hooked in all directions, in addition to the conventional manual starter hook 8a.
A simple improvement of connecting them with a string-like body 12 is sufficient, and
It is now possible to hook the bifurcated hook portion 13a of the operating rod 13 onto this emergency starter hook 11 from any direction, unlike in the past, where the hooking direction is limited to the front side of the manual starter hook 8a. Compared to previous models, hooking work can now be done more easily and in a shorter time. As a result, the engine 8 that stalled during pruning work can be restarted easily and quickly, and it is expected that the labor of the worker will be reduced and work efficiency will be improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of a pruning machine embodying the present invention, FIG. 2 is a plan view of the same, and FIG. 3 is an enlarged front view of the main parts. Code, 2, 4...Wheel (2...Drive wheel, 4...
...Idling wheel), 7... Trunk, 8... Engine, 8a
...Manual starter hook, 10...Chain saw, 11...Emergency starter hook, 12...String-shaped body.

Claims (1)

[Scope of utility model registration request] A suitable number of wheels 2, 4 that can be elastically held around the tree trunk 7 are arranged, and at least one or more of the wheels 2 are driven by the power of an engine 8 of a tension starting type with a manual starter hook 8a mounted thereon. In this pruning machine, the attached chain saw 10 is rotated relative to the trunk 7 to cut the branch on the way up. A starter hook for an engine of a pruning machine, characterized in that an emergency starter hook 11 having a bulging shape that can be hooked is connected by a string-like body 12.