JPS6312700Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a structure for attaching a spring to the frame of a pruning machine, which stabilizes the machine against changes in tree trunk diameter and facilitates removal of the machine.

BACKGROUND ART A self-elevating pruning machine shown in FIGS. 1 and 2 has been known.

In other words, the drive wheel 2 that comes into contact with the outer periphery of the tree trunk 1
A winding frame 5 made of a curved pipe shape equipped with... is pivoted at a connecting fulcrum 6, and a winding spring 7 is faced from inside the winding frame 5 to the side opposite to the connecting fulcrum 6, and the main body frame 3 side It is constructed so that it can be attached to and detached from it.

The pruning machine is equipped with an engine 8, the power of which is suitably changed in speed by a transmission 9, etc., and installed upward between the driving wheels 2 and 4 fixedly installed on the main body frame 3 side. In addition to being transmitted to the chain saw 10, it is also transmitted to the drive wheels 2, which climb the trunk 1 in a spiral manner, and the chain saw 10 cuts the branches 11 along the way.

Furthermore, when this pruning machine climbs a certain distance, the vertical switching mechanism 12 operates and automatically switches the vertical switching lever 13, which in turn reverses the drive wheels 2 and descends in the same spiral pattern.

In addition, Mitsushion 9 including Chainsaw 10
is configured to swing freely around the vertical drive wheels (not shown) of the drive wheels 2... on the upper and lower right stages as a swing fulcrum 0, and when moving upward, the chain saw 10 transmits power to the drive wheels 2... The branch 11 is swung toward the trunk 1 by the reaction force, and the distance between the branch 11 and the trunk 1 is determined by a stopper 14 installed on the chain saw 10, and the amount of protrusion of the branch 11 to be cut is kept constant. When descending, the chain saw 10 separates from the trunk 1 due to the same opposite transmission reaction force.

By the way, in such a pruning machine, even if the winding spring 7 is locked from the winding frame 5 to the main frame 3 side around the outer circumference of the tree trunk 1 and both frames 3 and 5 are pulled close to each other, the winding is not possible. Because the overall length of the spring 7 is short, the range in which the diameter of the trunk 1 can be changed in which a stable clamping force can be obtained by the driving wheels 2 and the idler wheels 4 is narrow.
Since the wrapping frame 5 does not automatically swing open with respect to the main body frame 3 around the connection fulcrum 6, it must be left in the open state when installing or removing this machine from the trunk 1. It is troublesome to have to perform installation and removal work after each installation, and especially since the installation position of the trunk 1 of the machine is considerably higher than the ground, the installation work becomes difficult and reduces work efficiency. I was letting it happen.

Therefore, this invention addresses the above-mentioned drawbacks by extending and fixing the winding spring 7 in the winding frame 5 through the outside of the connection fulcrum 6 to the main body frame 3 side.

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

FIG. 3 shows one of the embodiments,
A plate-shaped horizontal fixture 15 is provided protruding inward (towards the trunk 1 side) from one end of the main body frame 3 formed into a curved shape using pipe material, and a horizontal fixture 15 is also provided from the end of the wrapping frame 5. Connecting tools 16 are provided protrudingly, and these are pivotally connected at the connecting fulcrum 6, while one end is attached to the main body frame 3.
The winding spring 7 fixed with a fixing pin 17 at an appropriate location inside the body frame 3 is connected to the connecting fulcrum 6 from inside this main body frame 3.
It extends through the winding frame 5 through the outside and is fixed to a winding spring tension handle 19 having a hook-shaped locking device 18. Also,
The locking tools 18 of the tension handle 19 are provided at appropriate locations on the opposite body frame 3 side by pulling the winding spring 7, for example, at appropriate numbers of rows on the carrying handle 20 fixed to the body frame 3. It is locked in one of the stop holes 21.

Further, an appropriate rotational auxiliary guide 22 may be provided in order to smoothly rotate the wrapping frame 5 with respect to the main body frame 3 about the connection fulcrum 6.

This rotation auxiliary guide 22 is made of a curved elastic plate-shaped or rod-shaped material, and one end of this is fixed to the back surface of the horizontal connector 15, and the other end is slid onto the main body frame 3. When the winding frame 5 rotates about the connection fulcrum 6, the sliding end portion exerts a guiding action on the main body frame 3. Therefore, the rotation becomes smooth.

Note that the location where one end of the coiled spring 7 is fixed within the main body frame 3 is not limited to one location;
It may be made variable by fixing pins 17 that can be freely inserted into and removed from holes 17a arranged in rows at appropriate intervals.

In summary, this invention has one end fixed not only inside the main body frame 3 but also on the main body frame 3 side, passing through the inside of the winding frame 5 through the outside of the connection fulcrum 6 and facing the main body. frame 3
In the locked state where the frame is locked to the side, both frames 3
and 5 are pulled toward each other, while in the unlocked state, the winding frame 5 can be easily opened with respect to the main body frame 3.

Therefore, by pulling the wound spring tension handle 19, the locking tool 18 is locked in one of the locking holes 21, and both frames 3 and 5 are pulled toward each other. Both frames 3, 5
Even if the outer periphery of the trunk 1 of a large or small diameter tree to be pruned is held between the driving wheels 2 and the idle wheels 4 attached to the machine, there will be less change in the holding force, so the machine can be stably moved up and down. Not only can it be pruned, but when the locking tool 18 is removed and the lock is released after the branch is placed, the winding frame 5 automatically rotates around the connection fulcrum 6, and the winding frame 5 automatically opens due to the force of the winding spring 7. Then open the machine easily and stem 1
By ensuring this open state, it can be easily removed from the trunk 1 and attached to the trunk 1.

As is clear from the above explanation of the configuration, the following excellent effects can be expected with this invention.

First, since the winding spring 7 is exposed through the inside of the winding frame 5 from the main body frame 3 side, the winding spring 7 Since the overall length of the trunk 7 can be made longer and the spring constant can be made smaller, the change in the holding force that holds the outer periphery of the trunk 1 by the drive wheels 2 and the idler wheels 4 due to changes in the diameter of the trunk 1 can be reduced. This can improve the stability of the machine.

Also, the wrapping frame 5 is attached to the main body frame 3.
Since it can be opened freely, when removing the machine from the trunk 1 after pruning, by releasing the lock, the winding frame 5 automatically becomes open, making it easy to remove.
By ensuring this open state, installation to trunk 1 is also possible.
As in the past, each time the worker wraps the winding frame 5
This eliminates the need for the troublesome work of releasing the machine, and since the released state is ensured regardless of the tilt of the machine, it can be easily done even if the mounting position is high, further improving work efficiency.

[Brief explanation of the drawing]

1 and 2 are a front view and a plan view of a self-elevating branching machine, and FIG. 3 is a plan view showing an embodiment of this invention. Code, 1... Trunk, 2... Driving wheel, 3... Main body frame, 4... Idling wheel, 5... Wrap frame, 6
...Connection fulcrum, 7...winding spring.

Claims (1)

[Scope of utility model registration request] A main body frame 3 made of a pipe shape and equipped with driving wheels 2 that come into contact with the outer periphery of a tree trunk 1, and a wrapping frame 5 that is also made of a pipe shape and equipped with idler wheels 4 are pivotally connected at a connecting fulcrum 6. In addition, in a pruning machine configured such that the winding spring 7 faces the opposite side of the connection fulcrum 6 from within the winding frame 5 and is detachable from the main body frame 3 side, the winding spring 7 is attached to the main body. Connecting fulcrum 6 from the frame 3 side
A structure for attaching a spring to a frame of a pruning machine, characterized in that the spring is exposed through the inside of the winding frame 5 through the outside of the frame.