JPH01196222A - Bush cutter with auxiliary blade and said auxiliary blade - Google Patents

Abstract

PURPOSE:To prevent a phenomenon in which grass, bines, etc., wind around a housing due to rotation of a rotating blade, by constituting a bush cutter so as to mount an auxiliary blade on the top surface of the rotating blade in a specific posture. CONSTITUTION:An auxiliary blade 1 is mounted at a position near the top surface of a rotating blade 2 on the periphery of a housing 3 so as to oppose the blade tip 11 to the rotational direction of the rotating blade 2 in the erected form and freely regulate the position thereof. A position regulating mechanism of the auxiliary blade 1 may be any constitution it distances both from the housing 3 and from the top surface of the rotating blade 2 and erecting angle can be respectively regulated. In case a plate unit is adopted as the auxiliary blade 1, the most simple means is to realize the position regulating mechanism by forming adjustable holes 12 and 13 in different directions and suitably changing the positions of fixed parts, such as thumbsrew, in the direction of slots thereof.

Description

[Detailed Description of the Invention] (Object of the Invention) This invention relates to a brush cutter that is widely used as a simple grass cutter for agricultural work and other purposes. The purpose of the present invention is to provide a new structure for preventing the phenomenon in which the wire wraps around the housing.

(Prior art) Brush cutters have a simple structure, are easy to handle, and can be purchased at relatively low prices, so they can be used for mowing field ridges and roadsides, mowing undergrowth of mountains, gardens, parks, etc., which were previously done with sickles. This is a very commonly used working machine for mowing infested weeds.

However, even though this brush cutter is certainly convenient, during the actual work process, it can easily get tangled with long thin grass such as thatch, vines, or other plants, such as plastic bags or packing cords discarded among the weeds. They often stick to grass, making it difficult to carry out continuous mowing work.

Therefore, if the weeds become tangled, the operator has no choice but to stop mowing, stop the machine, stop the rotation of the circular blade, and then take the machine off his shoulder. I managed to remove the tangled objects by manually resetting the rotation of the circular blade, and once things were back to normal, I started the engine, put the shoulder belt over my shoulder again, and returned to my original task.

With conventional brush cutters, this troublesome work has to be repeated many times during grass mowing, which not only reduces work efficiency but also puts an extra burden on the worker and, in some cases, The machine becomes irritated by the repeated phenomenon and ends up trying to remove grass etc. without stopping the rotation, which can lead to unexpected situations such as injury, which can lead to extremely dangerous situations. It was something.

In view of the actual situation of conventional brush cutters, this invention can be sold as a pre-installed product for any type of conventional brush cutter, or can be sold as a pre-installed product for any type of conventional brush cutter. If so, we have successfully developed and put into practical use a brush cutter with an auxiliary blade that has a new structure that can be installed later, and an auxiliary blade for it.

(Structure of the Invention) As clearly understood from the representative embodiment of the invention shown in the drawings, the brush cutter with auxiliary blade of the invention basically consists of the following IT.

That is, the auxiliary blade 1 is mounted on the periphery of the housing 3 at a position close to the upper surface of the rotary blade 2 so that the cutting edge runs against the direction of rotation of the rotary blade 2 and stands upright. It is a brush cutter with a blade.

The housing 3 is shaped like an upside-down top, and a drive shaft that transmits driving force from an engine (not shown) mounted on the rear end of the operating rod 4 passes through the inside of the operating rod 4. It reaches inside the housing 3 and transmits its rotational force to the rotating shaft of the rotary blade 2 by a combination of gears, etc., and is attached to the tip of the operating rod 4 in a so-called conventionally known brush cutter. The rotary blade 2 is designed to protect the transmission mechanism such as combination gears arranged inside the rotary blade, and at the same time, the rotary blade 2 can be removably attached to the lower surface of the rotary blade.

The auxiliary blade 1 has its cutting edge 11 installed at a position on the periphery of the housing 3 close to the upper surface of the rotary blade 2, and its orientation is in a direction opposite to the direction of rotation of the rotary blade 2. And, as long as it is arranged upright, that is, in a state where it crosses the upper surface of the rotary blade 2 at an appropriate angle, its shape and structure do not matter, but for example, the following In addition to being plate-shaped as seen in the examples,
It is possible to appropriately adopt a rod-shaped object in which the tip is used as a cutting edge 11 and the base is used as a fixing part to the housing 3 or the operating rod 4 at an appropriate position.

Hereinafter, specific embodiments shown in the drawings will be described.

(Embodiment 1) In this embodiment, as typified by those shown in FIGS. 1 and 2, a cutting edge 11 is placed on the periphery of the housing 3 at a position close to the upper surface of the rotary blade 2. This brush cutter is equipped with an auxiliary blade 1 which runs counter to the direction of rotation of the rotary blade 2 and stands upright, and which is equipped with an auxiliary blade 1 so that its position can be adjusted. The position adjustment mechanism for the auxiliary blade 1 may be of any configuration as long as the distance from the housing 3, the distance from the top surface of the rotary blade 2, and the installation angle can be adjusted. If a plate-like blade like the one shown in the figure is used as the blade 1, a hole 12, 13 with a different direction is formed, and the position of a fixing part such as a medium screw is changed as appropriate in the direction of the long hole. The easiest way to achieve this is to do so.

(Embodiment 2) In the next example, as also represented by the embodiments shown in FIG. An auxiliary blade equipped with an auxiliary blade made of a flat member that runs counter to the direction of rotation of the blade 2 and is erected, and also serves as a grass board so that its position can be adjusted. It's a grass cutter.

Weeds cut by a brush cutter remain lying on their sides, making it difficult to tell how far they have been cut, so normally, the rotating blade 2 is pressed against the weeds to either the left or right. We are trying to move the blades in the direction of , but since the rotary blade 2 itself is thin, it is not always possible to move them all at once.
The reality is that the objective cannot be achieved unless the process is repeated many times, but if the auxiliary blade 2 of this embodiment is formed into a wood-like piece of a larger size, the surface of this plate can be It becomes convenient for pushing the cut grass away, and the function is no longer merely to prevent tangles, but it has a configuration that has practical value.

Therefore, in some cases, if the width and length are wider than those shown in the diagram, and the lower edge is formed at the cutting edge 11, the effect of serving as a grass board will be even more effective. become what is done.

In the figures of each of the embodiments described above, 5 indicates a metal fitting for fixing the auxiliary blade, which can be fitted into the appropriate position of the housing 3 as in the embodiment, or fitted into the operating rod 4. . Then, the auxiliary blade 1 is fixed by screwing or fitting with an appropriate fixing metal fitting, for example, a butterfly screw 6 as shown in the figure.

Reference numeral 7 denotes a fixing fitting that directly fixes the housing 3, and in the illustrated example, it is similarly formed by a butterfly screw. Of course, this part may also be fixed via the metal fittings 5.

Some specific configurations of the most ideal auxiliary blade 1 to be employed in the brush cutter with auxiliary blade configured as described above are shown below.

(Other related inventions) That is, the planar shape of the main body of the auxiliary blade 1 is formed from a flat plate member having a substantially “C” shape curved near the tip, and the cutting edge 11
is formed on the lower edge of the main body of the auxiliary blade 1,
This is an auxiliary blade used in the brush cutter with an auxiliary blade of the present invention.

Hereinafter, specific embodiments shown in the drawings will be described.

(Embodiment 3) The one shown in FIGS. 3 to 8 is formed from a flat plate member in the shape of a sideways "C" curved toward the tip, and its cutting edge 11 is approximately at the lower edge of the main body of the auxiliary blade 1. This is an embodiment in which a groove is formed from around the center to near the tip.

In this example, a downwardly directed auxiliary blade portion 11a is formed continuous with the cutting edge 11, but it is of course possible to omit this portion depending on the case.

There is no problem even if the cutting edge 11 is formed in two stages as shown in the drawing 9.

A brush cutter equipped with the auxiliary blade 1 having this configuration is shown in a front view of the main part in FIG. 1 and a plan view of the main part in FIG. 2. As can be understood from these drawings, the auxiliary blade 1 having this configuration has the housing 3 in a plane.
By being mounted on the right side of the rotary blade 2, the cutting edge 11 is erected so as to face the rotation of the rotary blade 2.

(Embodiment 4) In the one shown in FIGS. 10 to 12, the planar shape of the main body of the auxiliary blade 1 is formed from an upside-down "C"-shaped flat plate member curved near the tip, and the cutting edge 11 is , which is an auxiliary blade used in the brush cutter with an auxiliary blade of the present invention, which is formed so as to start from the tip of the main body of the auxiliary blade 1 and bite into the center of the lower edge.

As shown in the main part plan view of the mounted state in FIG. It will be erected in such a way that it will be heading towards the end of the year.

(Function and Effect) The brush cutter with auxiliary blade of the present invention having the above-mentioned configuration performs grass cutting work in the same manner as conventional brush cutters, and during the work, the rotary blade 2 As the blade rotates, foreign objects such as grass and string that try to get tangled around the lower part of the housing 3 are reliably cut off by this auxiliary blade 1 before they get tangled.
This eliminates the hassle of interrupting work to remove tangled objects, making work extremely efficient.

This brush cutter with an auxiliary blade is not only sold with a dedicated auxiliary blade 1 installed for each model in advance, but also the auxiliary blade 1 is sold separately as a set together with the metal fitting 4, and is sold separately from the purchasing ministry. It is also possible to make a brush cutter with an auxiliary blade by attaching the brush cutter as appropriate, and in the latter case, if the brush cutter has the configuration shown in Embodiment 1, which incorporates an adjustable structure, This makes it extremely easy to install the brush cutter in an optimal manner depending on the type of brush cutter.

Furthermore, if the auxiliary blade 1 is a brush cutter with an auxiliary blade as shown in embodiment 2, which takes into consideration the function as a weeding board in advance, mowing work can be continued for a long time without tangles of grass, etc. While performing this, it is also possible to dispose of weeds that have been cut and are lying on their sides, ensuring even more efficient mowing work.

On the other hand, if the auxiliary blade 1 used in such a brush cutter with an auxiliary blade is made of a flat plate member in the shape of a sub-circuit, the auxiliary blade can be easily set in a predetermined state. Outside, you can realize 1! i! It is also easy to construct and can be provided at low cost.

Furthermore, if the configuration shown in Embodiment 3 or 4 is used, the housing 3 can be mounted on either the left or right side depending on the user's convenience, and in particular, it can be installed on either the left or right side of the housing 3 as in Embodiment 2. When realizing a brush cutter with an auxiliary blade that also functions as a board, it becomes possible to reliably meet the needs of the user and to make it more practical.

As mentioned above, this invention makes it possible to completely prevent grass etc. from getting tangled, which was a drawback of conventional brush cutters, and furthermore, it is easy to manufacture due to its simple structure. Since it can be provided at a low cost, is easy to handle, and has little danger, it is expected that it will be widely used by farmers and civil engineering workers, from private workers to ordinary households.

[Brief explanation of the drawing]

The drawings are based on an embodiment representative of the present invention, and FIG. 1 is a front view of the main part, FIG. 2 is a plan view of the main part, and FIG. 3 is a front view of only the auxiliary blade. 4 is a top view, FIG. 5 is a bottom view, FIG. 6 is a back view, FIG. 7 is a right side view, FIG. 8 is a left side view, and FIG. FIG. 10 is a front view of another embodiment, FIG. 11 is a plan view, FIG. 12 is a right side view, and FIG. 13 is a front view of another embodiment. FIG. 2 is a plan view of the main parts of the attached brush cutter. 1... Auxiliary blade, 11... Cutting edge, 12.13... Bracket hole, 2... Rotating blade, 3... Housing, 4...
Operation rod, 5... Mounting metal fittings, 6... Butterfly screw, 7...
·securing bracket. Figure 1 Figure 2

Claims (1)

[Claims] 1. An auxiliary blade in which an auxiliary blade is mounted on the periphery of the housing at a position close to the upper surface of the rotary blade so that the cutting edge runs against the direction of rotation of the rotary blade and stands upright. Brush cutter with blade. 2. On the periphery of the housing, at a position close to the upper surface of the rotary blade, the cutting edge runs against the direction of rotation of the rotary blade and is erected, and an auxiliary blade is installed so that its position can be adjusted. A brush cutter with an attached auxiliary blade. 3. At a position near the upper surface of the rotary blade on the periphery of the housing, the cutting edge is arranged so as to run counter to the direction of rotation of the rotary blade and to stand up, and the position can be adjusted. A brush cutter with an auxiliary blade is equipped with an auxiliary blade made of a flat plate-like member that also serves as a weeding board. 4 The planar shape of the auxiliary blade body is curved toward the tip.
An auxiliary blade for use in a brush cutter with an auxiliary blade according to any one of claims 1 to 3, wherein the auxiliary blade is formed from a square-shaped flat plate member, and the cutting edge thereof is formed at a proper position on the lower edge of the auxiliary blade main body. 5. The auxiliary blade for use in a brush cutter with an auxiliary blade according to claim 4, wherein the cutting edge is formed in a biting manner from approximately the center of the lower edge of the auxiliary blade body to near the tip. 6. The auxiliary blade for use in a brush cutter with an auxiliary blade according to claim 4, wherein the cutting edge starts from the tip of the auxiliary blade main body and is formed in a biting manner around the center of the lower edge.