JPH0333243Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is based on a main engine frame 2 in which the chain saw 1 is protruded upward, and an auxiliary engine frame 3 facing the main engine frame 2, which is attached to a tree trunk 4.
A tilting drive device 6 is provided on the main machine frame 2 side in contact with the tree trunk 4, and a driven device 7 in contact with the tree trunk 4 is provided in the holding machine frame 3, and the automatic climbing system rotates and ascends around the tree trunk 4. In the branch cutting device, horizontal rollers 8, 8 are supported reciprocally on the side of the auxiliary device frame 3 in the main device frame 2, and the rollers 8, 8 are arranged in parallel in the horizontal direction.Relating to a pull-down roller device in a branch cutting machine. The purpose is to quickly lower the pruning machine.

The tilt drive device 6 is connected to the main engine frame 2 as shown in FIG.
It consists of two parallel crawlers 6', 6' inclined with respect to the vertical direction, and the horizontal rollers 8, 8 are the fourth
As shown in FIG. 5, the rollers 8, 8 are provided in parallel in the horizontal direction with respect to the vertical direction, and the rollers 8, 8 are each freely supported by a horizontal shaft 10 at the lower end of the fork 9.
A horizontal shaft 11 at the upper end of the crotch 9 is pivotally supported on a bearing 12 provided on the main engine frame 2, and a lever 13 extending rearward is provided at the upper part of the crotch 9. The rollers 8 arranged in parallel,
The positions 8 can be provided at positions corresponding to the contact positions between the crawler 6' and the tree trunk 4, respectively.
(Figure 4). The driven device 7 is a plurality of idle rollers 14 that contact the tree trunk 4 at an eccentric position, but casters may also be used. In addition, what is indicated by 15 in the figure is the lever 13.
16 is a string take-up reel, 17 is a horizontal mutual movement guide rod for both machine frames 2 and 3, and 18 is the same rod 1.
7 is a sliding guide rod that fits, and 19 is a horizontal shaft that is pivoted to the main engine frame 2. 20 is an operating arm fixed to both ends of the coaxial shaft 19; 21 is a link between the same arm 20 and the holding machine frame 3;
2 is a driving engine.

Therefore, when the prime mover 22 is started, the two machine frames 2 and 3 can cut the branch 23 with the chain saw 1 while swinging up the tree trunk 4 by the tilting drive device 6. After rising to a predetermined position, the prime mover 22 is stopped by a signal from the ground, and the lower end of the hanging string 15 is wound onto the reel 16 to be indexed downward. The main engine frame 2 moves from the solid line position in Figure 5 to the imaginary line position centering on and presses the tree trunk 4 against the spring 5.
The driving device 6 moves to the right from the solid line position to the imaginary line position in the figure, and the driving device 6 comes off the tree trunk 4, and the tree trunk 4 is held between the driven device 7 and the horizontal rollers 8, 8, and descends directly along the tree trunk 4 without turning. be able to.

Conventional horizontal rollers were arranged vertically (vertically) in parallel on the main machine frame, so that the driving device and the tree trunk were in contact with each other at both ends thereof. Therefore, a tree trunk with a large diameter is at a large distance from the lateral roller for pulling down, and a tree trunk with a small diameter is close to the lateral roller for pulling down. Therefore, since the width of the reciprocating movement distance of the horizontal rollers must be made large, there is a problem in that it is difficult to quickly perform the pulling down movement of the horizontal rollers.

This proposal was made in view of the above defects, and
Since the horizontal rollers 8, 8 are arranged side by side in the horizontal direction, the rollers 8, 8 can be arranged at positions corresponding to the contact area between the drive device 6 and the tree trunk 4, and the same can be achieved regardless of the diameter of the tree trunk 4. By slightly advancing the rollers 8, 8 toward the tree trunk 4, the drive device 6 is quickly separated from the tree trunk 4, and both machine frames 2, 3 can be quickly lowered from the tree trunk 4.

[Brief explanation of drawings]

Fig. 1 is a front view showing a pruning machine equipped with the proposed pulling roller device, Fig. 2 is a side view of the pruning machine, Fig. 3 is a plan view of the pruning machine, and Fig. 4 is a plan view of the pruning machine. FIG. 5 is a plan view of the pull-down roller and a side view of the pull-down roller in an operating state. 1...Chain saw, 2...Main machine frame, 3...Auxiliary machine frame,
4...Tree trunk, 5...Spring, 6...Inclination drive device, 7...Following device, 8...Horizontal roller.

Claims (1)

[Scope of utility model registration request] A main engine frame 2 provided with a chain saw 1 projecting upward and an auxiliary engine frame 3 facing the main engine frame 3 are connected by a spring 5 via a tree trunk 4, and a tilting drive device 6 is provided on the main engine frame 2 side in contact with the tree trunk 4. , in an automatic climbing branch cutting device that rotates and ascends around the tree trunk 4 by providing a driven device 7 in contact with the tree trunk 4 on the auxiliary machine frame 3, horizontal rollers 8, 8 are attached to the main machine frame 2 so that they can freely reciprocate toward the auxiliary machine frame 3 side. A pull-down roller device for a pruning machine, in which rollers 8, 8 are arranged side by side in the horizontal direction.