JPS6021961Y2 - Cutting section structure of pruning machine - Google Patents

Description

[Detailed description of the invention] This invention relates to a cutting section structure of a pruning machine for pruning planted timber (mainly cedar or cypress) during the growth process to obtain good quality wood without knots.

Hereinafter, this invention will be specifically explained based on illustrated embodiments.

In the figure, the symbol A indicates a pruning machine attached so as to surround the tree trunk B, and the vertical members 2, 2 are integrally provided at both ends of the circular arc member 1. At the upper and lower ends of the vertical members 2, 2, there are mounting brackets. 3,
The fixed frame 5 is constructed by connecting the upper mounting brackets 3 and 3' with an arc material similar to the arc material 1.

A shaft 6 is rotatably provided on the upper and lower mounting brackets 3 and 3', and an arcuate member 7 is provided on the shaft 6 to form a movable frame 8.

Further, a locking tool 10 is provided on the fixed frame 5, and the movable frame 8
The other end of the spring 9 provided at the tip 7' of the spring 9 is configured to be able to be engaged and detached.

Reference numeral 11 denotes a support arm provided on the vertical member 2, and fixes a transmission cylinder 12 having a transmission shaft inserted therein at its tip.

An engine 14 is connected to the middle of the transmission cylinder 12 via a gear case 13, and the driving force of the engine 14 is distributed to both ends of the transmission cylinder 12 via a gear in the gear case 13 and a transmission shaft in the transmission cylinder 12. In addition, the fixed frame 1 and the movable frame 8 are provided with floating wheels 16 and
..., and as shown in FIG. 1, the lifting device 17 is configured so that the tree trunk B can be held between the lifting wheels 15 and 16.

Note that the gear housing 13 has a tooth row that can be switched up and down.

Reference numeral 18 indicates a cutting part, and a saw support member 20 is fixed to a transmission case 19 fixed to the side of the engine 14', and a chain-shaped saw 21 is hung around the outer peripheral edge of the saw support member 20 so that the plane thereof is approximately parallel to the surface of the tree trunk. The chain saw 21 is configured to be rotatable by a sprocket 22 provided on the output shaft of the transmission case 19, and a pin 2 is provided on the saw support member 20.
3 is provided with a spring member 24 having one end locked, and one end of a shaft body 26 that slidably passes through a long hole 25 provided in the saw support member 20 and long in the direction of rotation of the pruning machine, that is, the saw support member 20. A guide member 27 is provided on the tree trunk side, the other end is fixed to a guide support 28, and the spring material 24 is attached to the upright portion 28' of the guide support 28.
The guide member 27 is always held resiliently in the direction of the cutting operation side 21' of the chain saw, that is, in the branch cutting direction of the pruning machine.

Incidentally, B' indicates a branch, B' indicates the base of the branch, and arrow A indicates the cutting direction of the chain saw.

In such a configuration, in order to assemble the pruning machine A to the tree trunk B, remove the spring 9 from the locking tool 10 of the fixed frame 5, open the movable frame 8, insert the tree trunk into the frame from here, and then When the frame 8 is closed and the spring 9 is relatched to the locking tool 10, the elevating device 17 such as the elevating wheel 15 and the floating elevating wheel 16 is lifted.
is pressed against the surface of tree trunk B by the action of spring 9.

Then, the engine 14 is started, the gear housing 13 is operated, the lifting device 17 is driven, and the pruning machine A is moved upward.

At this time, when the engine 14 rotates above a certain level, the cutting section 18 also enters the working state where it can cut, and as the pruning machine A rotates and rises around the tree trunk, the chain-shaped saw of the cutting section 18 is cut as shown in the fourth figure. 21 cuts into the branch base B'' of the branch B' in the direction of arrow A.

The guide member 27 provided on the saw support member 20 is connected to the chain-shaped saw 21
However, in order to obtain knot-free wood, it is necessary to cut the branch smoothly, so the chain saw 21 tries to cut as much of the base of the branch B as possible. At this time, the guide member 27 comes into contact with the branch base 1'' and is in the same state as if it had been pushed back along the elongated hole 25 against the spring force of the spring member 24, and the chain is moved as shown in FIG. This makes it easy for the saw 21 to move linearly in the direction of arrow A, making it possible to cut smoothly so that the cutting branches do not protrude from the surface of the tree trunk.

When the branch B' has been cut, the spring member 24 causes the guide member 27 to return to the position before contacting the branch B'.

Further, in the embodiment, the elevating device is driven by an engine, but this is not limited to the engine, and a chain block or the like may also be used.

Further, in order to achieve a smaller size and lighter weight, the chain saw and the lifting device are driven by the same engine, but they may be driven by separate engines.

That is, in a pruning machine that performs pruning by moving upwardly while rotating around the trunk of a tree, the cutting part 18, which is configured by a chain saw 21 wrapped around a saw support material 20 and is in an almost vertical position, cuts the saw support material. 20 is provided with a long elongated hole 25 in the direction of rotation of the pruning machine, a shaft body 26 is inserted through the elongated hole 25, and a guide member 27 is provided on the tree trunk side of the saw support material 20, and on the opposite side from the tree trunk side. A guide support 28 is provided on the holder, the guide member 27 and the guide support 28 are fixed to the shaft 26, and the guide support 28 is fixed to the saw support 20 in the branch cutting direction of the pruning machine. Since the guide member 27 can be pushed back against the spring force of the spring member 24 when the guide member 27 comes into contact with the base of a branch, the chain-shaped saw, which has been a problem in the past, can be When cutting along the surface of the tree trunk, the guide member comes into contact with the ridge at the base and rides on it, pushing the saw support outward from the surface of the tree trunk, causing the cut portion to twist and resulting in a smooth cut surface. In addition, this caused resistance during cutting and caused engine stoppage, but this problem has been resolved, and in addition, conventional machines have large engines due to the large engine load. However, with the cutting section structure of this invention, the engine can be made smaller, the weight of the entire aircraft can be reduced, and it is also easy to manufacture, which has many advantages.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is an overall view, FIG. 2 is an enlarged view of main parts, FIG. 3 is a side view of FIG. 2, and FIGS. 4 and 5 are explanatory diagrams of operation. . A... Branching machine, 20... Saw support material,
21... Chain-shaped saw, 18... Cutting section, 25... Elongated hole, 26... Shaft body, 27
...Guiding member, 28...Guiding support body,
24...Spring material.

Claims (1)

[Scope of utility model registration request] In a pruning machine that performs pruning, a cutting part 18 in an almost vertical position, which is constructed by winding a chain saw 21 around a saw support material 20, moves upward while rotating around the trunk of a tree to perform pruning. , a long elongated hole 25 is provided in the rotation direction of the pruning machine,
A shaft body 26 is inserted through the elongated hole 25, a guide member 27 is provided on the tree trunk side of the saw support material 20, and a guide support body 28 is provided on the side opposite to the tree trunk side, and the guide member 27 and the guide support body 28 are provided. is fixed to the shaft body 26, and the guide support body 28 is pressed in the branch cutting direction of the pruning machine by a spring member 24 attached to the saw support member 20, so that the guide member 27 comes into contact with the branch base etc. A cutting section structure for a pruning machine, characterized in that it is capable of retreating against the spring force of the spring material 24 when it comes into contact with the branching machine.