JPS6334515Y2 - - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a wrapping arm of a pruning machine.

A circular frame is constructed to surround the trunk, and a drive wheel and idler wheels are attached to this circular frame, which also press against the outer circumference of the trunk. Dropping pruning machines are known.

This invention provides a pruning machine in which a circular frame is composed of a main arm and a winding arm, and the winding arm of the pruning machine can respond well to changes in the diameter of the trunk.

Hereinafter, specific embodiments of this invention will be described with reference to the drawings.

First, to outline the overall configuration of this pruning machine (see Figures 1 and 2), it consists of a circular frame that surrounds the trunk 3 with two main arms 1 and two winding arms 2 at the top and bottom. A total of four drive wheels 4 are attached to the main arm 1 and two idle wheels 5 are attached to the wrapping arm 2.
The outer periphery of the trunk 3 is held by the handles. When the drive wheel 4 is driven in this state, the pruning machine climbs the trunk 3 in a spiral, but at this time, the chain saw 6 installed facing upward
When activated, the branch 7 in the middle will be cut. This pruning machine is equipped with an up-and-down switching device 8, so that when it climbs a preset distance, it reverses direction and descends.

By the way, the first configuration of this invention is to connect the main arm 1 and the wrapping arm 2 by first pivotally attaching the slide bar 9 to the wrapping arm 2, so that the slide bar 9 can be freely slid onto the main arm 1. This has been accommodated. Therefore, the wrapping arm 2 will move back and forth depending on the diameter of the trunk 3, and the pivot point 10 will also move back and forth at the same time.

Next, in the second configuration, a spring bar 11 that pulls the slide bar 9 toward the main arm 1 is arranged inside the main arm 1 in the vertical direction. That is, since the drive wheel 4 and the idler wheel 5 must press the trunk 3 quite strongly, the winding arm 2 and therefore the slide bar 9 must be constantly pressed against the main arm 1.
It is being pulled to the side.

FIG. 3 is a developed sectional view of the slide bar 9, and its configuration is as follows.

The upper and lower main arms 1, 1 are connected by a vertical frame 13, and the slide bars 9, 9 are slidably fitted into the main arms 1, 1.

Further, engaging pieces 12, 12 are vertically provided branching off from the slide bars 9, 9.

On the other hand, the spring bars 11, 11 are at the same vertical position as the upper and lower main arms 1, 1,
Moreover, it is disposed inside the main arms 1, 1 in the vertical direction.

One end of the spring bar 11 is engaged with the engagement piece 12, and the spring bar 11 extends rearward through the vertical frame 13 in a slidable manner.

A spring 15 device is provided in this extended portion.

The spring 15 is placed on the spring bar 11 between the left and right cups 14, 14 under an urging force that tends to separate the cups 14, 14 from each other.

Of these cups 14, 14, the one on the right side in the figure is prevented from moving by a nut, and the cup 14 on the left side in the figure can freely slide on the spring bar 11. ing.

In addition, 16 in the figure indicates a spring 15 and a cup 1.
This is a pipe-shaped case for covering things such as 4.

With this configuration, the cup 14 on the right side in the figure tends to move to the right as much as possible due to the repulsive force exerted by the spring 15 that tends to cause the cups 14, 14 to move away from each other.

However, this cup 14 is prevented from moving by the nut, and therefore necessarily the spring bar 11 to which this nut is connected
acts to move it to the right.

As a result, the locking piece 12 engaged with one end of the spring bar 11 also moves together from the position shown by the dashed line in the figure to the position shown by the solid line, and in conjunction with this, the slide bar 9 also slides inside the main arm 1 and acts to constantly pull the wrapped arm 2 towards the main arm 1 side.

FIG. 4 shows the aforementioned pivot point 1 of the wrapping arm 2.
0, a spring 17 extends from the open end of the winding arm 2, and a hook 18 is attached to the tip of the spring 17, so this hook 18 is attached to the main arm 1. Handle 1 attached to
The hole 20 formed in the hole 9 is engaged with an appropriate object in the hole 20 for fixation.

As is clear from the above explanation, this invention is such that, even if the diameter of the trunk 3 changes, the slide bar 9 will slide from the main arm 1, that is, the position of the pivot point 10 will change. Because of this, there is little change in the angle of the wrapped arm 2, and the idler wheel 5 makes good contact with the trunk 3.

Further, since one end of the winding arm 2 has such a sliding structure, only the other end can be connected to and removed from the main arm 1, and operability is good from this point of view as well. In this respect, the conventional model is inferior in terms of operability because it requires a hooking and unhooking operation at both ends.

Furthermore, the spring 15 and the spring bar 11
at the same vertical position as main arm 1, and
Since they are arranged on the upper and lower rear sides, there is no possibility that they will protrude to the side or in the vertical direction of the main arm 1, and troubles such as getting caught on branches 7 etc. during work will not occur.

[Brief explanation of the drawing]

The drawings show an embodiment of this invention. Figure 1 is a front view of the branching machine, Figure 2 is a plan view, and Figure 3 is a plan view of the branching machine.
The figure is a developed sectional view taken along the X arrow in FIG. 2, and FIG. 4 is a partial sectional view taken along the Y arrow in FIG. Symbols: 1...main arm, 2...wound arm, 9...slide bar, 11...spring bar.

Claims (1)

[Scope of utility model registration request] This winding arm 2 of a pruning machine has a circular frame composed of upper and lower main arms 1 and winding arms 2.
A slide bar 9 is pivotally attached to the end thereof, and the slide bar 9 is slidably fitted to the main arm 1 side, and a spring bar 11 that pulls the slide bar 9 toward the main arm 1 side is attached to the main arm. At the same vertical position as 1, and
The wrapping arm of a branching machine is characterized by being arranged on the inside in the vertical direction.