JP2006211991A - Member for preventing weed from coiling around in bush cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a member for preventing weeds from coiling around a rotary shaft at the lower part of a housing of a bush cutter. <P>SOLUTION: The coiling around on the rotary shaft of the housing 7 is prevented by attaching the rotary shaft to an attaching metal fitting 10 fixed to a handle 6 of the bush cutter to change the directions of the forces of the weeds rotating in the same direction as a circular saw 9 by the member for preventing the weeds from coiling around by utilizing the centrifugal force caused on the rotating circular saw 9. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

The present invention relates to a brush cutter used when cutting weeds that grow naturally in forests, open spaces, and fields.

Conventional brush cutters are usually configured as follows.

A housing is fixed to a lower end portion of a handle that is used while being held at an angle, and a rotating shaft extending vertically is supported on the housing. A flange-shaped upper circular saw sandwiching member and a lower circular saw sandwiching member are fitted to the lower end of the rotary shaft drilled downward from the housing and fixed by appropriate means such as screws. The peripheral edge of the mounting hole of the saw is clamped. A handle, an operating lever, etc. are provided on the top of the handle, and the rotary shaft is driven to rotate by the engine provided on the back of the handle or on the shoulder carried by the operator. Is supposed to do.

There are no patent documents and non-patent documents related to the present invention.

Since the bush cutter according to the prior art is manufactured for the purpose of cutting weeds, it is inadequate for the case where the cut weeds are wound around the rotating shaft below the housing. However, since the weeds were wound and the circular saw stopped rotating, the work efficiency was poor, and the circular saw stopped rotating, so it was very dangerous to remove the wound weeds without stopping the engine. The present invention has been made to solve this problem.

  The weed wrap prevention member of the present invention that achieves the above-mentioned problem is attached to the left side surface of the bush cutter housing, so that the weeds rotating in the same direction as the circular saw rotating counterclockwise are When passing the side of the prevention member, the direction of the force is changed backward to prevent weeds from being wound.

The weed wrap prevention member of the present invention is mounted so that the tip is located near the center of the left side surface of the bush cutter housing, and the distance between the circular saw and the bottom is within 1 mm to 2 mm, and weed cutting work Even if it is performed, weeds are wound around the rotating shaft and the rotation of the circular saw does not stop, so that the work efficiency is improved and the risk of injury is eliminated because it is not removed by hand.

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

Although there are other shapes of the weed wrapping prevention member 1, it will be described with reference to FIG. 1 as an example.

1, the weed prevention member 1 has an angle α and an angle β with the base 3 facing the circular saw 9 as a reference line.

The angle α is an angle formed by the base 3 and the upper base 2 and is 90 degrees to 60 degrees, and the angle β is an angle formed by the base 3 and the lower base 4 and is 90 degrees to 145 degrees.

The length L of the base 3 facing the circular saw 9 is 3 cm to 5 cm.

The thickness t of the material of the weed prevention member 1 of FIG. 2 shall be 1 mm-2 mm.

In order to attach the weed wrapping prevention member 1 to the brush cutter, the mounting bracket 10 in FIG. 3 is attached to the tip of the handle 6 of the brush cutter in FIG. 4 and the bolt 11 and the nut so that the bolt 13 faces to the left. Tighten and fix with 12. Two brackets are fixed for safety.

Next, as shown in the attachment diagram of FIG. 4, the weed wrapping prevention member 1 is provided with the bolt 13 of the mounting bracket 10 fixed to the weed wrapping prevention member 1 so that the upper base 2 faces upward. Are inserted into the two mounting holes 5 and tightened with the nuts 8 for mounting.

It is assumed that the attached weed wrapping prevention member 1 is positioned near the center of the housing 7 where the cut grass is difficult to wrap.

Further, the distance w between the circular saw 9 and the base 3 is set to be within 1 mm to 2 mm from the size of the grass stem.

The weed wrapping prevention member 1 satisfying such conditions uses the centrifugal force of the circular saw 9 to completely prevent weed wrapping.

I think iron is the best material for the weed prevention member, but aluminum or copper may be used.

It is a top view of the weeding prevention member of weeds concerning a 1st embodiment of the present invention. Sectional drawing of FIG. It is a perspective view of a mounting bracket. It is an attachment figure of the weeding prevention member of the weeds of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Weed winding prevention member 2 Upper base 3 Bottom side 4 Lower base 5 Mounting hole α, β Angle L Length t Thickness 6 Handle 7 Housing 8, 12 Nut 9 Circular saw 10 Mounting bracket 11, 13 Bolt w Interval

Claims (6)

It is a weed-winding prevention member that eliminates weeds that wind around the neck portion of the brush cutter by utilizing the centrifugal force generated when the circular saw rotates. It has an angle with respect to the base, facing the circular saw, the angle between the base and the upper base is 90 to 60 degrees, and the angle between the base and the lower base is 90 to 145 degrees. The length of the base facing the circular saw is 3 to 5 cm. The thickness of the weed prevention member is 1 mm to 2 mm. The distance between the circular saw and the base is within 1 mm to 2 mm. The position of the tip of the weed wrapping prevention member is set near the center of the housing.

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