JPH0216580Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a brush cutter used for mowing lawns, weeds, etc.

(Prior Art and its Problems) Portable brush cutters have been used for mowing lawns, weeds, and the like. A brush cutter consists of a main body equipped with a small engine and a blade section provided at the tip of the main body, and the blade section uses a rotating blade. Various types of rotary blades have been proposed, and one of them is the rotary blade described in Japanese Patent Publication No. 4689/1989, which was previously proposed by the inventor of the present invention.
This is a disc-shaped support member and a plurality of blades protruding approximately radially from the periphery of the disc-shaped support member, which are integrally molded from an elastic polymer material. This rotary blade has the great advantage of being sharp because it has a large number of blades, and is less likely to be damaged even if it comes into contact with an obstacle. However, since it is a rotating blade, there is still a risk of contact with the human body. Furthermore, since the rotary blade has a relatively complicated shape, it has the disadvantage of being expensive, which also causes an increase in the running cost of the brush cutter.

(Technical means for solving the problems) In view of the above-mentioned problems, an object of the present invention is to provide a brush cutter having a blade body that is less dangerous and inexpensive. The technical means is a brush cutter consisting of a main body and a blade section provided at the tip of the main body, and the blade section includes a linear blade body and support members that support both ends of the blade body. , and a vibration device that applies vibration to the blade.

(Example) Hereinafter, an example of the present invention will be described based on the drawings.

In FIG. 1, a brush cutter 1 is comprised of a main body 2 and a blade portion 3 provided at the tip thereof. An engine 5 is attached to the rear end of the beam 4 of the main body 2,
A steering rod 6 having grips 7, 7 is attached near the center thereof. The blade part 3 is provided with support members 9, 9 that support both ends of a linear blade body 10 at both ends of a plate 8 which is attached to the beam 4 so that its rotation angle position can be adjusted. A vibrating device 11 is provided inside the blade body 10 for converting the rotation of the engine 5 into reciprocating motion and applying vibration to the blade body 10.

As shown in FIG. 2, the blade body 10 is a linear blade 10a made of copper wire, aluminum alloy wire, carbon fiber, plastic material, etc. and having a diameter of about 1 to 2 mm.
Attachment portions 10b are provided at both ends of the support member 9, and the attachment portion 10b is inserted into the support member 9 to be mounted. The blade body 10 is vibrated several thousand to tens of thousands of times per minute by the vibrating device 11 in a direction perpendicular to its length direction.

Examples of the vibration device 11 include one in which the rotational force of the engine 5 rotates an eccentric cam and converts it into reciprocating motion, and one in which the engine 5 rotates a generator to drive an electromagnetic vibration device. A support member 9 may also be used as the support member 9.

FIG. 3 shows the state in which the brush cutter 1 is used, with the engine 5 rotating and the blade 10 vibrated by the vibrating device 11, the blade 10 is held at its length against the grass to be cut. Harvest by pressing in a direction perpendicular to the direction. The blade 10 is displaced at high speed by high-frequency vibrations and cuts grass and grass, but the amplitude of the blade 10 is small (about 1 mm), so even if it comes into contact with the human body, the risk is very low. There is also no risk of fragments of the blade body 10 flying off. Moreover, since the blade body 10 has a very simple structure, the manufacturing cost is low, and even if the blade body 10 is replaced due to wear, the effect on the running cost of the brush cutter 1 can be kept low.

In the embodiment described above, the blade part 3 is attached to the beam 4 so that the rotational angle position can be adjusted, so that the blade part 10 can be oriented in an appropriate direction depending on the direction of movement of the brush cutter. However, it may be fixed.

(Effects of the invention) According to the invention, since vibration is applied to the linear blade to cut grass, grass, etc., there is no danger like that of a rotary blade, and the structure is simple and the manufacturing of the blade is simple. The cost is low, and it is possible to suppress the increase in the running cost of the brush cutter.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view of a brush cutter, FIG. 2 is a front view of a blade, and FIG. 3 is a perspective view of the brush cutter in use. 1...Brush cutter, 2...Main body, 3...Blade portion, 9...
...support member, 10...blade body, 11...vibration device.

Claims (1)

[Scope of utility model registration request] A brush cutter consisting of a main body and a blade section provided at the tip of the main body, the blade section including a linear blade body,
A brush cutter comprising: a support member that supports both ends of the blade; and a vibration device that applies vibration to the blade.