JP2527318Y2 - Brush cutter - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bush cutter, and more particularly to a mounting structure of a safety cover.

[0002]

2. Description of the Related Art Generally, there is widely known a brush cutter that rotates a cutting blade to cut weeds and the like. In recent years, some of such brush cutters can selectively use a blade type blade and a line trimmer type blade in combination.

[0003] However, when the blade type blade and the line trimmer type blade are mounted on a brush cutter,
Mounting height is different. On the other hand, a normal brush cutter is provided with a safety cover to prevent pebbles and the like from scattering at the time of work and hitting an operator. If the safety cover is mounted at an appropriate height position for the blade, there is a problem that the effect as the safety cover is reduced during the operation of the line trimmer type cutting blade. Also, if the safety cover is installed at an appropriate height for the line trimmer type cutting blade,
When the blade type cutting blade is attached, the safety cover hits the ground, so that sufficient mowing work cannot be performed.

Accordingly, a brush cutter capable of changing the mounting position of the safety cover has been proposed (Japanese Utility Model Application Laid-Open No. 61-1).
No. 48128).

[0005]

However, the one disclosed in the above publication has a problem that the safety cover is fixed via a mounting bracket and the structure is complicated.

The present invention has been made in view of the above problems, and provides a brush cutter which has a simple structure, is easy to manufacture, and can reduce the cost by reducing the number of parts. The purpose is to:

[0007]

SUMMARY OF THE INVENTION The present invention provides an elongated handle shaft, an operating handle attached to one end of the handle shaft, a housing provided at the other end of the handle shaft, and a housing inside the housing. a drive unit housed in a cutting blade which is driven by the driving device, possess a safety cover for covering the cutting blade, the cutting blade is Bed
Selectable use of blade type and line trimmer type
A first engaging portion that is long in the vertical direction is formed on an outer surface of the housing, and a second engaging portion that can be engaged with the first engaging portion is formed on the safety cover. In a state where the first engagement portion and the second engagement portion are engaged with each other, the safety cover is held by the housing so as to be movable in a longitudinal direction of the first engagement portion, and the safety cover is attached to the housing. It is characterized by being fixed by a fixing jig.

[0008]

When using a blade-type cutting blade, the second engaging portion of the safety cover is positioned above the first engaging portion of the housing, and the safety cover is fixed to the housing by a fixing jig. Thus, the safety cover can be mounted at a position suitable for using a blade-type cutting blade.

When using a line trimmer type cutting blade, the second engaging portion of the safety cover is positioned below the first engaging portion of the housing, and the safety cover is fixed to the housing by a fixing jig. I do. Thus, the safety cover can be mounted at a position suitable for using a line trimmer type cutting blade.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of the brush cutter according to the present invention. Reference numeral 1 in the figure denotes a handle shaft, and a handle 2 is attached to the upper end of the handle shaft 1 in the figure. A housing 3, which is a working unit, is attached to the lower end of the handle shaft 1 in the figure. FIG. 2 is an enlarged view of the working unit. A drive motor (not shown) is housed inside the housing 3, and a blade type rotary blade 4 is attached to an output shaft driven by the drive motor. As shown in FIG. 3, a guide groove 3a, which is a first engagement portion, is formed on the outer surface of the housing 3 so as to be long in the vertical direction in the figure. Further, in FIG. 2, a nut 5 is provided inside the housing 3 so as to be vertically movable. The guide groove 3a is engaged with an engagement portion 6a, which is a second engagement portion formed at the edge of the safety cover 6 having a shape as shown in FIG. 4, and the knob bolt 7 passes through the hole 6b. I have. By screwing the knob bolt 7 to the nut 5 provided in the vertical groove 3C of the housing 3, the safety cover 6 is fixed at a position where it is engaged with the upper end of the guide groove 3a (FIGS. 5 and 6). ).

FIG. 7 is an enlarged view of the working section with the line trimmer type flexible strip 8 attached. In this case, the flexible blade 8 is attached below the rotary blade 4 in the figure, so that the knob bolt 7 is slightly loosened to enable sliding along the vertical groove 3C, and the safety cover is provided. 6 is slid downward along the guide groove 3a in the figure, and at this position, the safety cover 6 can be fixed by setting it to the optimum position and fastening the knob bolt 7 as in the case described above.

The operation of the bush cutter constructed as described above will be described below. When the steel rotary blade 4 is used, the safety cover 6 is fixed by the knob bolt 7 in a state where the safety cover 6 is positioned above the guide groove 3a in the drawing. In this state, a drive motor (not shown) is operated to perform mowing work.

When mowing weeds near a curb or the like, the use of a steel rotary blade 4 may cause the rotary blade 4 to hit the curb or the like, causing the rotary blade 4 to be broken and flying. Because of the danger, the mowing operation can be safely performed by using the plastic flexible blade 8. At this time, the safety cover 6 is slid to the lower end of the guide groove 3a and fixed by the knob bolt 7. In this state, a drive motor (not shown) is operated to perform mowing.

In this manner, the position of the safety cover 6 can be adjusted by the guide groove 3 with a brush cutter which can use both the blade type rotary blade 4 and the line trimmer type flexible strip blade 8.
It can be easily converted simply by moving it up and down along a.

FIG. 8 shows another embodiment of the brush cutter according to the present invention. That is, in the above-described embodiment, the guide groove 3a and the engaging portion 6a are each described as having two structures, one each on the left and right, but as shown in FIG. The numbers of the guide grooves 3a and the engagement portions 6a are not limited at all. Further, in the above embodiment, the housing 3
The guide groove 3a and the engaging portion 6a are formed in the safety cover 6, but as shown in FIG.
An engagement recess 6c may be formed in the safety cover 6.

[0016]

[Effect of the Invention] The present invention is configured as described above, and by appropriately adjusting the height position of the safety cover,
Scattering of pebbles and the like can be reliably prevented. Further, since the position adjusting operation is also performed by the fixing jig, it can be easily performed. Further, the safety cover has an effect that it can be adjusted to an arbitrary height position.

[Brief description of the drawings]

FIG. 1 is a front view of a brush cutter according to the present invention.

FIG. 2 is an enlarged view of a working unit of the brush cutter according to the present invention.

FIG. 3 is a perspective view of a housing of the brush cutter according to the present invention;

FIG. 4 is a perspective view of the safety cover of the brush cutter according to the present invention.

FIG. 5 is a plan view of a working part of the brush cutter according to the present invention.

FIG. 6 is an enlarged view of a working unit of the brush cutter according to the present invention.

FIG. 7 is an enlarged view of a working unit of the bush cutter according to the present invention.

FIG. 8 is a view showing another embodiment of the brush cutter according to the present invention.

FIG. 9 is a view showing another embodiment of the brush cutter according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Handle shaft 2 ... Handle (operation handle) 3 ... Housing 3a ... Guide groove (first engagement part) 3b ... Engagement convex part (first engagement part) 3c ... Vertical groove 4 ... Rotary blade (cutting blade) Reference Signs List 5 nut (fixing jig) 6 safety cover 6a engaging portion (second engaging portion) 6c engaging concave portion (second engaging portion) 7 knob bolt (fixing jig) 8 flexible strip Blade (cutting blade)

Claims (1)

(57) [Scope of request for utility model registration] 1. An elongated handle shaft, an operation handle attached to one end of the handle shaft,
Possess a housing provided at the other end of the handle shaft, and housed drive device in the housing, a cutting blade driven by the driving device, and a safety cover for covering the cutting blade, the cutting blade Is the blade type and line
In a brush cutter capable of selectively using a reamer type, a first engagement portion that is vertically long is formed on an outer surface of the housing, and the safety cover can be engaged with the first engagement portion. A second engagement portion is formed, and the safety cover is held by the housing so as to be movable in a longitudinal direction of the first engagement portion in a state where the first engagement portion and the second engagement portion are engaged. The brush cutter, wherein the safety cover is fixed to the housing by a fixing jig.