JPH036182Y2 - - Google Patents

Description

[Detailed description of the invention] Industrial field of application This invention relates to a pruning machine for cutting off branches of standing trees such as cedar.

Conventional Technology In the past, when cutting branches from standing trees such as cedar trees, workers used to manually perform the pruning work while climbing up the logs while holding a machete or sickle.
In recent years, equipment has been developed that automatically climbs trees while pruning, but the manufacturing cost is high. Therefore, the applicant developed a pruning machine with a cutting blade fixed to the upper end of an inner tube elastically locked in the tube, and filed an application (Patent Application No. 205406 of 1983).
However, in this pruning machine,
Since both the outer tube and the inner tube are circular, a guide groove is provided on the outer tube and a pin protruding from the inner tube is fitted into the outer tube, making it easy for dust and water to enter the inside. The tube body had drawbacks such as being difficult to grip.

Problems to be Solved by the Invention In other words, in order to eliminate the above-mentioned drawbacks, the present invention is a pruning machine in which the inner and outer tubes are oval shaped and the guide grooves are removed, and the inner tube is prevented from freely rotating. It is characterized by improved durability by preventing dust and water from entering the interior, and furthermore, by being oval in shape, it is easy to hold and improves workability.

Means for Solving the Problems The configuration of the present invention will be explained below with reference to embodiment figures.

A bottom plate 2 is fixed to the lower end of an outer tube 1 having an appropriate diameter and length with diameters in both directions, and an inner tube 3 that fits inside the outer tube 1 with diameters in both directions similarly to the outer tube 1 is fixed. Bearings 4 and 4' are provided to pivotally support the guide shaft 5, and the lower end of a coil spring 7, whose upper end is locked to a pin 6 provided near the top of the inner tube 3, is locked to the upper end of the guide shaft 5. , the inner tube 3 is fitted into the outer tube 1 and the lower end of the guide shaft 5 is fixed through the bottom plate 2, and a short tube 8 is fitted into the upper end of the inner tube 3 protruding from the upper end of the outer tube 1. A handle plate 9 is provided at the upper end protruding obliquely upward in front view,
A crescent sickle 11 having a cutting edge 10 on the lower surface is fixed to one side of the handle plate 9, and a V-shaped receiving part 12 is provided protruding from the other side, and the upper surface V of the receiving part 12 and the crescent sickle 11 is fixed to one side of the handle plate 9.
A cutting edge 10' is provided in the mold part, the short tube 8 is inserted into the upper end of the inner tube 3 and secured with a bolt 13, and a pin hole is formed in the lower end of the outer tube 1 and the inner tube 3 so as to communicate with each other. This is made to constitute a pruning machine 15 in which a locking pin 14 which is opened and attached to the bottom plate 2 is removably inserted. In the figure, 16 indicates a log, and 17 indicates a branch.

Functions and Effects Next, the functions and effects of the present invention will be explained with reference to embodiment figures.

The pruning machine 15 according to the present invention is constructed by gripping the outer tube 1 with both hands after disengaging the locking pin 14 at the lower end of the outer tube 1 as shown in the embodiment diagram in FIG.
After applying the cutting blade 10 on the lower surface of the crescent sickle 11 to 7, the outer tube 1 is suddenly pushed upward, and the inner tube 3 slides upward against the elasticity of the coil spring 7 due to the impact, and then the next return elasticity is applied. In addition, the cutting blade 10 can easily cut off the branch 17 when sliding downward due to its own weight, and before that, the upper cutting blade 10'
However, if a cut groove is provided on the lower surface of the holding branch 17, cutting can be made more smoothly.

In this invention, by making the outer tube 1 and the inner tube 3 oval, the inner tube 3 does not rotate freely, and since no guide groove is provided on the outer tube, moisture and dust can enter the inside. The outer tube 1 can be easily gripped and a strong force can be applied, and the outer tube 1 and the inner tube 3 can be held together by the locking pin 14. By making it possible to perform cutting while directly applying manual force to the cutting blade 10, the above-mentioned remarkable effects can be achieved.

[Brief explanation of drawings]

Fig. 1 is a front view of a pruning machine according to an embodiment of the present invention, Fig. 2 is a right side view thereof, and Fig. 3 is a pruning machine according to an embodiment of the present invention.
FIG. 4 is a partially enlarged sectional view taken along the line, FIG. 4 is an enlarged sectional view taken along the same line, and FIG. 1... Outer tube, 3... Inner tube, 5... Guide shaft, 7
... Coil spring, 8 ... Short tube, 9 ... Handle plate, 10, 10' ... Cutting blade, 11 ... Crescent sickle,
12... Receiving part, 14... Locking pin.

Claims (1)

[Scope of utility model registration request] A bottom plate is fixed to the lower end of an elliptical outer tube with diameters on both sides, and a bearing is provided on the inner tube, which is elliptical like the outer tube, to pivotally support the guide shaft, and the upper end of the guide shaft. is locked in the inner tube with a coil spring, the inner tube is inserted into the outer tube, the guide shaft is locked in the bottom plate, and the upper end of the short tube that fits into the protruding upper end of the inner tube is bent diagonally upward from the front. Fix the bent handle plate, protrude a crescent sickle and a receiving part on both sides of the upper end of the handle plate, provide a V-shaped cutting blade on the upper surface of the crescent sickle and the receiving part, and fix the short pipe to the upper end of the inner pipe. A pruning machine characterized in that a pin hole is provided near the lower end of the outer tube through the inner tube, and a locking pin is inserted into the pin hole.