JPH0424904Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Field of Application] The present invention relates to a winding preventer in a brush cutter, and more specifically, the cutting blade is moved horizontally and vertically in order to reliably cut the grass that is trying to wind around. The horizontal blade is arranged at different angles in the height direction to enable cutting over a wide range in the height direction,
The present invention relates to a winding preventer for a brush cutter, characterized in that the height of the vertical blade is adjustable and furthermore, it is possible to cut grass clippings that enter from above.

[Prior art and its problems] A brush cutter has a gear case and a disc-shaped cutting blade attached to one end of a hollow main rod, and the other end of the main rod is equipped with an engine that serves as a power source. The output is transmitted to the gear in the gear case through a transmission shaft inserted into the main rod, which rotates the cutting blade to cut down grass, etc. However, the cutting blade is fastened to the end of a rotating shaft that is rotatably supported in the gear case with a nut or the like that is screwed into the end of the rotating shaft via a receiver or the like. Vines and the like often got wrapped around the rotating shaft or support plate exposed between the gear case and the cutting blade. The winding of grass clippings puts an overload on the engine, which reduces the rotation of the cutting blade and significantly reduces work efficiency. Therefore, the operator should use the cutting blade with a small amount of grass covering it to prevent the grass clippings from getting wrapped around it. In reality, if a worker found grass clippings or grass clippings, he or she would stop work, stop the engine, and remove the clipped grass. In order to further improve work efficiency, measures to prevent this wrapping have become an urgent need.

[Means for solving the problem] In order to solve this problem, the applicant first devised a wrap prevention body having a horizontal blade and a vertical blade, and also filed an application (Utility Application No. 124909/1989), which was extremely successful. Although it has been highly effective, through repeated experiments using monitors, it has been found that the cutting effect can be improved by reducing the distance between the lower end of the gear case and the vertical blade as much as possible. Although the distance and angle between the gear case and the cutting blade differ somewhat depending on the manufacturer of the brush cutter, if the height of the vertical blade can be adjusted, it will be compatible with each of these models. Furthermore, it has been found that the cutting effect can be further enhanced if the horizontal blades are not arranged in a straight line, but by changing the vertical angle of each blade little by little.

Therefore, in the case of the present invention, in view of this problem, a plurality of horizontal blades are made to protrude outward from the top of the peripheral wall of the Schare type main body, and the horizontal blades are set at different angles in the height direction. At the same time, vertical blades are arranged on the peripheral wall alternately with the horizontal blades, the height of which can be adjusted freely.
An appropriate mounting hole is provided in the center of the bottom of the main body to provide a wrap prevention body for the brush cutter.

[Example] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

The main body of the anti-winding body 1 has a sheerle shape, and a plurality of horizontal blades 3, 3, .
The horizontal blades 3, 3, . . . are not arranged at right angles to the surface of the peripheral wall 2, that is, in a straight line, but are arranged at different angles in the height direction.
Further, the horizontal blades 3, 3, . . . may be twisted as appropriate for the purpose of generating buoyancy and scattering the grass clippings when the anti-tangling body 1 is rotated. In this embodiment, the horizontal blades 3, 3...
are formed integrally with the peripheral wall 2, but it is also possible to attach separate horizontal blades 3, 3, . . . using bolts. At the intermediate position between the horizontal blade 3 and the next horizontal blade 3 on the outer surface of the peripheral wall 2 are vertical blades 5, 5, which will be described later.
A recess 6 is formed at approximately the same depth as the thickness of the recess 6 on which the vertical blades 5, 5... can be slid in the vertical direction.
A bolt hole 7 serving as a mounting hole is bored in the center. Reference numeral 4 denotes a mounting hole bored in the center of the bottom of the main body.

The vertical blades 5, 5... have a triangular shape made from a square piece, and have a long hole 8 bored in the center.
The vertical blades 5, 5, . . . are configured to be fastened to the recess 6 of the peripheral wall 2 using truss machine screws 9 or the like so as to be adjustable in the vertical direction. Incidentally, in this embodiment, the vertical blades 5, 5, . . . are made as a single unit, but as shown in FIG. It is also possible to form a long hole 8 in the ring portion of the vertical blade 10 and adjust the vertical blade 10 in the vertical direction as described above. In this case, the above-mentioned peripheral wall 2
The recess 6 provided on the outer surface of is not necessary.

[Function] Next, the method of attaching the wrapping prevention body 1 and its function will be explained. As shown in FIG. Vertical blade 5, 5...
etc., facing upward. At this time, the tip of the gear case 11 and the receiver 13 come to be located inside the wrap prevention body 1. The cutting blade 14 is installed next to the wrapping prevention body 1, and the nut 1 is attached via the washer 15.
Tighten with 6. Once the installation is complete, the vertical blades 5, 5...
Bring the tips of the ... close to the bottom surface of the gear case 11 and tighten. The wrapping prevention body 1 rotates together with the cutting blade 14, and cuts the grass that tries to wrap around the grass with the horizontal blades 3, 3, . . . and vertical blades 5, 5, . Since the gaps are close to each other, the cuts are mainly made in this area.

[Effects of the invention] As described above, the present invention has a plurality of horizontal blades 3, which are arranged outwardly on the top of the peripheral wall 2 of the Schare mold body 1.
3... are made to protrude, and the horizontal blades 3, 3... are set at different angles in the height direction, and vertical blades 3, 3... are arranged vertically in alternating positions with the horizontal blades 3, 3... on the peripheral wall 2, so that the height can be freely adjusted. Since this is a wrap-around prevention body for a brush cutter, which has blades 5, 5... and an appropriate mounting hole 4 drilled in the center of the bottom of the main body 1, it has conventionally been possible to remove soft grass clippings or Vines, etc. often got wrapped around the rotating shaft exposed between the gear case and the cutting blade. This wrapping of grass clippings overloads the engine, reduces the rotation of the cutting blade, and significantly reduces work efficiency, so operators should use the cutting blade with a small amount of grass to prevent it from getting wrapped around it. If grass was found to be wrapped around the machine, the work would be stopped, the engine would be stopped, and the grass clippings would be removed.However, by installing the wrapping prevention body 1 according to the present invention, it is possible to prevent the grass from wrapping around the rotating shaft 12, etc. The grass clippings are reliably cut by the horizontal blades 3, 3, .
Furthermore, since a large number of horizontal blades 3, 3... and vertical blades 5, 5... of the anti-tangling body 1 are arranged horizontally and vertically alternately, the grass clippings that have been cut once will be cut by the next blade. Also, since the grass is cut short, there will be no wrapping around the grass. Moreover, at a position where the gear case 11 and the cutting blade 14 are close to each other, the vertical blades 5, 5, . . .
1. It is adjusted to bring it closer to the bottom surface, so
Grass clippings that try to pass between the lower surface of the gear case 11 and the cutting blade 14 are reliably cut, the engine is not stopped due to the grass wrapping around the blade 14, and the grass is cut over the entire area of the cutting blade 14. It has truly remarkable effects, such as significantly improving work efficiency because it does not get twisted even if it is wrapped.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention. FIG. 2 is a partially sectional side view of the embodiment. FIG. 3 is a partially sectional side view for explaining another embodiment of the present invention. FIG. 4 is a partially sectional side view for explaining the installed state. 1... Winding prevention body, 2... Peripheral wall, 3... Horizontal blade, 4... Mounting hole, 5... Vertical blade.

Claims (1)

[Scope of utility model registration request] A plurality of horizontal blades are made to protrude outward from the top of the peripheral wall of the Schare type main body, and the horizontal blades are set at different angles in the height direction. An anti-tangling body for a brush cutter, which has a vertical blade that can be adjusted freely, and has an appropriate mounting hole bored in the center of the bottom of the main body.