JP2004065193A - Guard for grass cutter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a guard for a grass cutter to surely receive small stones, etc., scattered during the grass cutting work. <P>SOLUTION: An attaching base 20 is detachably attached to the handle 51 of the grass cutter 50 and a guard plate 30 is attached at the upper side part of the attaching base. The guard plate is produced by bending a nearly flat main body plate 34 downward at least at the side part in the rotational direction of the cutting blade and at least a half of the cutting blade in the rotational direction is hidden from the worker. A soft sheet 40 is dangled from the rear end of the guard plate and the materials 60 scattered by the cutting blade, colliding with other bodies and sprung against the worker are received by the guard plate or the soft sheet. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a guard for a brush cutter, and more particularly to a guard that can reliably receive pebbles and the like flying during mowing.
[0002]
[Prior art]
Since weeds grow densely in the road shoulders, paddy field ridges, gardens, and parks from the rainy season to summer, mowing is performed using a brush cutter, for example.
[0003]
For this brush cutter, a disk-type brush cutter provided with tips and cutting blades on the outer periphery of the disk, or a wire-type brush cutter having a plurality of wire blades extending from a disk-shaped base is used. However, in either case, it is very dangerous if the limbs or clothes of the worker come into contact with the brush cutter rotating at high speed.
[0004]
Therefore, a structure is adopted in which a cover is attached to the handle of the bush cutter so as to cover the back of the bush blade so as to prevent an operator from coming into contact with the bush blade rotating at a high speed during work (for example, an actual machine). See Japanese Unexamined Patent Publication No. Sho 52-170629 and Japanese Utility Model Laid-Open Publication No. Hei 02-23416.
[0005]
By the way, during the mowing operation using a mower, the mowing grass scatters around, and when the high-speed rotating mower blade hits a pebble, pebbles, fragments of the pebble or chipped blades scatter around. May collide with workers or others, causing pain or injury.
[0006]
The above-mentioned cover is intended to prevent the worker from coming into contact with the mowing blade, and prevents the cut grass, pebbles and debris, and chipped blades (hereinafter simply referred to as pebbles) from scattering. It is not something that can be reliably stopped.
[0007]
Therefore, a mower in which the holder plate is attached to the handle of the bush cutter almost perpendicularly to the center line of the handle, the upper edge of the seat is mounted in front of the upper edge of the holder plate, and the pebble flying by the sheet is received. A guard for the machine (Utility Model Registration No. 2552876), a guard plate is attached to the handle of the brush cutter so as to extend from the tip of the handle of the brush cutter and cover the back of the cutter blade. A guard for a brush cutter (Utility Model Registration No. 30111310) has been proposed in which an upper edge is attached to receive pebbles and the like scattered by a sheet.
[0008]
[Problems to be solved by the invention]
However, since the former brush cutter guard has a structure in which a sheet is provided in a vertical direction between an operator and a brush cutter, a sufficiently large sheet is used to reliably receive flying pebbles and the like. It is necessary, but if the sheet is too large, it will hinder the work. After all, there is a problem that although pebbles flying toward the lower body of the worker can be received, pebbles flying toward the chest and the face cannot be received.
[0009]
On the other hand, the latter mower guard has a structure in which the upper part of the rear half of the mower blade is covered with a guard plate, but pebbles and the like may be scattered toward the worker.
[0010]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a guard for a brush cutter that can reliably receive pebbles and the like flying during mowing work.
[0011]
[Means for Solving the Problems]
The present inventor has studied in detail the scattering phenomenon of pebbles and the like during mowing work in order to solve the above-mentioned problems, and has found the following. Normally, the brush cutter is rotated counterclockwise, and the worker leans the brush cutter slightly to the left to perform mowing work. In such a case, the weeds are trimmed using the portion from the cutting edge to the left side of the blade as seen from the operator, and the cut grass is scattered vigorously toward the left side and wrapped around the blade. The grass scatters to the side and right side of the worker, but the momentum is weak. On the other hand, the brush blade hits the pebbles on the ground from the operator's point of view from the cutting edge to the left, and the pebbles, pebble fragments, and missing blades face left or diagonally to the left. It scatters vigorously, but hardly scatters on the worker's side. What is scattered to the worker side is small stones, small stone fragments, chipped blades (hereinafter referred to as rebound bodies) which scattered vigorously to the left side or diagonally to the left side and collided with other stones and rebounded. . Therefore, it is sufficient to receive the rebounding body that rebounds from the left side of the brush cutter toward the worker.
[0012]
Accordingly, a brush cutter guard according to the present invention is a brush cutter guard for receiving a bouncing body that is scattered by a brush blade and collides with another object and rebounds toward an operator. A mounting base removably mounted on the mounting base, and a substantially flat main body plate having at least a side portion on the rotation direction side of the brush cutter blade bent downward, and A guard plate provided so that at least a half in the rotation direction side of the mowing blade is hidden in the main body plate as viewed from an operator operating the machine, and a guard plate hanging down from a rear edge of the guard plate, and And a soft sheet having an insertion portion through which the handle is inserted.
[0013]
One of the features of the present invention is that at least a half of the blade in the rotation direction is covered by a guard plate, and the back of the blade is covered with a soft sheet.
[0014]
As a result, the portion from the cutting edge to the left side of the brush blade hits the pebbles on the ground, and the pebbles, fragments of the pebbles, and the chipped blade scatter vigorously toward the left side or diagonally to the left, and other stones When the object collides with the object and rebounds toward the worker, the rebounded body hits the guard plate or the soft sheet and is received, thereby eliminating the possibility of the worker colliding with the worker and feeling pain or injury.
[0015]
In order to reliably receive the rebounding body that rebounds toward the worker, it is preferable that the guard plate be inclined so that the left side is lower when the brushing blade rotates counterclockwise and when the blade is rotated counterclockwise. Therefore, it is preferable that the mounting base has a structure that can be mounted on the handle of the brush cutter so that the guard plate is inclined in the rotation direction side of the brush cutter. For example, if a structure is adopted in which the mounting base is tightened with screws and mounted on the handle of the brush cutter, the guard plate can be tilted to the left.
[0016]
When the guard plate is tilted in the rotation direction, at least a half of the blade in the rotation direction may not be hidden in the guard plate even when the position of the mounting base with respect to the brush cutter is adjusted. In such a case, if the guard plate is tilted with respect to the mounting base, at least a half of the blade in the rotation direction can be hidden well in the guard plate. That is, the guard plate is preferably provided so as to be tiltable with respect to the mounting base.
[0017]
During the mowing operation, it is necessary to operate the handle of the mower so that the mower blade can hit the weeds well. Therefore, the guard plate and / or the soft sheet are preferably transparent or translucent. In addition, the material of the guard plate and the sheet is not particularly limited, and may be made of a light metal material such as aluminum. Good. That is, the guard plate is preferably made of a transparent or translucent hard resin material, and the soft sheet is preferably made of a transparent or translucent soft resin material.
[0018]
According to the prototype of the inventor of the present invention, it has been confirmed that the guard according to the present invention has a great effect when it is mounted on a brush cutter having a wire-type brush cutter. Can also be equipped with a brush cutter.
[0019]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail based on specific examples shown in the drawings. 1 to 4 show a preferred embodiment of a guard for a brush cutter according to the present invention. In the figure, the brush cutter guard 10 includes a mounting bracket (mounting base) 20, a guard plate 30, and a soft sheet 40.
[0020]
The mounting bracket 20 has a configuration in which the handle 51 of the brush cutter 50 is sandwiched from both sides, and is attached to the handle 51 by tightening with a screw.
[0021]
The guard plate 30 is made of a transparent acrylic resin and is manufactured in a form having bent portions 35 bent downward on both sides of a flat main body plate 34 having a substantially square shape. A metal band plate 31 for reinforcement is provided on the back surface of the guard plate 30 so as to extend in the front-rear direction, and is fixed by screws.
[0022]
The rear end portion of the metal strip 31 is bent to form a connecting piece 32, and the connecting piece 32 is sandwiched between the upper ends of the mounting brackets 20 and fixed together by a tightening screw. It is attached to the mounting bracket 20 so as to be tiltable.
[0023]
A metal band plate 33 for attachment is provided on the upper surface of the rear end portion of the guard plate 30 so as to extend in the width direction, and is fixed by being screwed. The upper edge of the soft sheet 40 is sandwiched between the metal strip 33 and the guard plate 30.
[0024]
The soft sheet 40 is manufactured in a substantially square shape using a transparent vinyl resin, and an insertion hole (insertion portion) 41 through which the handle 51 of the brush cutter 50 is inserted is formed in the center of the upper end.
[0025]
Here, the structure of the brush cutter 50 equipped with the guard 10 of the present embodiment will be briefly described. A driving force transmission mechanism is built in the handle 51, and a disk-shaped base 52 is rotatably attached to the tip of the handle 51, and the base 52 is provided with two wire blades 53, and thus a wire-shaped blade is provided. A brush cutter blade is configured.
[0026]
A handle 54 is attached to a rear portion of the handle 51, and a driving engine 55 is provided at a rear end of the handle 51, and a driving force of the driving engine 55 is transmitted through a driving force transmission mechanism (not shown) in the handle 51 to a base portion. 52, the wire blade 53 rotates at a high speed to cut weeds.
[0027]
When attaching the guard 10 of this example, the screw of the mounting bracket 20 is loosened, the mounting bracket 2 is hung on the tip side of the handle 51 of the brush cutter 50, and the screw is tightened for mounting. At this time, the mounting bracket 20 is set so that the guard plate 30 is inclined to the left, and at least the left side of the mowing blade, preferably the whole, is hidden in the guard plate 30 when viewed from the operator. Set the angle.
[0028]
When the mowing operation is performed, when the driving engine 55 is operated, the driving force is transmitted to the mowing blade, and the mowing blade rotates left. Therefore, as shown in FIG. 3, when the user holds the handle 54 of the brush cutter 50 so that the cutter blade is tilted to the left, and moves forward or backward while swinging the cutter blade to the left or right, the cutter that rotates at a high speed. The blade hits the weed and cuts the weed.
[0029]
At that time, when the brush blade hits a pebble on the ground, the pebble, debris of the pebble, and the debris of the wire blade scatter to the left or diagonally to the left, and when they collide with stones or other objects, they rebound toward the worker, There is a risk of hitting the worker.
[0030]
In this example, since the entire blade is covered with the guard plate 30 and the soft sheet 40 covers the rear of the blade, as shown in FIG. Pebbles, pebble fragments, wire blade fragments, and other rebounds 60 that have bounced back toward are received by the guard plate 30 or the soft sheet 40 and do not reach the worker.
[0031]
Therefore, pebbles and the like do not collide with the worker during the mowing operation, and the worker does not feel pain or injury.
[Brief description of the drawings]
FIG. 1 is a schematic perspective view showing a preferred embodiment of a guard for a brush cutter according to the present invention.
FIG. 2 is a perspective view showing a state in which the embodiment is attached to a handle of a brush cutter.
FIG. 3 is a diagram showing a state during a mowing operation.
FIG. 4 is a diagram for explaining the operation of the embodiment.
[Explanation of symbols]
10 Guard 20 Mounting bracket (mounting base)
Reference Signs List 30 guard plate 40 soft sheet 50 brush cutter 51 handle 52 base 53 wire blade 54 handle 55 drive engine 60 pebble

Claims (6)

A brush cutter guard for receiving a bouncing body that is scattered by the brush blade and collides with another object and rebounds toward the worker,
An installation base detachably attached to the handle of the brush cutter,
It is attached to the upper portion of the attachment base, and at least a side portion of the substantially flat body plate on the rotation direction side of the mowing blade has a shape bent downward, which is seen from an operator operating the mowing machine. A guard plate provided so that at least a half of the brushing blade in the rotation direction side is hidden in the main body plate,
A soft sheet that is hung down from the rear edge of the guard plate and has an insertion portion for inserting the handle into the upper end portion,
A guard for a brush cutter, comprising: The brush cutter guard according to claim 1, wherein the mounting base is attachable to a handle of the brush cutter such that the guard plate is inclined toward the rotation direction of the cutter blade. 3. The brush cutter guard according to claim 1, wherein a rotation direction side of the brush cutter blade is a left side when viewed from an operator. The guard for a brush cutter according to any one of claims 1 to 3, wherein the guard plate is provided so as to be tiltable with respect to the mounting base. The guard for a brush cutter according to any one of claims 1 to 4, wherein the guard plate is made of a transparent or translucent hard resin material, and the soft sheet is made of a transparent or translucent soft resin material. The brush cutter guard according to any one of claims 1 to 5, which is provided in a brush cutter having a wire-type brush cutter formed by extending a wire blade from a disk-shaped base.

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