JPH0739334U - Cutter for preventing winding of brush cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] When the brush cutter is used, the cutting grass to be wound around the mounting shaft side of the rotary blade of the brush cutter main body is cut to suppress the winding. [Structure] A rising portion is provided on the outer peripheral edge of the auxiliary blade main body, and the rising portion is low on the auxiliary blade main body side and gradually increases as the distance from the auxiliary blade main body side increases, and a saw blade is formed on the rising portion. It has been done.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 This invention relates to an auxiliary blade of a rotary blade that is attached to a brush cutter main body and used, and a cutter equipped with the auxiliary blade. In particular, plants and vines that try to wrap around the upper surface of the rotary blade mounting part when using a brush cutter (hereinafter, uncut plants are referred to as "grass", and plants after cutting are referred to as "cut grass"). ) It is related to an auxiliary blade for preventing the cutting of the grass by simply cutting the grass.

It is widely known that a normal use method of this type of brush cutter is that an operator stands in front of the uncut grass to be mowed and drives the brush cutter to perform the mowing work.

In this case, since uncut grass grows on the back side of the brush cutter, the cut grass is obstructed by the uncut grass and is wound around the upper surface of the rotary blade mounting portion. The phenomenon of trying to occur occurs.

In particular, since the rotary blade is usually mounted in an inverted T-shape with respect to the base of the mounting portion, it is difficult to avoid strong cutting grass being wrapped around the base. It was

[0005]

[Prior art]

 Therefore, in order to solve the above-mentioned problems, an auxiliary blade is provided on the upper surface of the mounting portion against the horizontal surface of the rotary blade body to cut the grass to be wound around the upper surface of the mounting portion. There is something to be tried (see Japanese Utility Model Publication No. 4-24904).

However, in this conventional technique, the grass to be wound up after cutting is scattered upward as it is along the side surface upright portion of the dish type main body, and is not cut secondarily to the attachment portion. It was often wrapped around.

Further, since the so-called code cutter is not provided with a solution, it is impossible to prevent the cutting grass from being wound around the lower portion of the drive shaft case (US Pat. No. 4,145,809). reference).

[0008]

[Problems to be solved by the device]

 The problem to be solved by this invention is that it is not possible to reliably cut the grass to be wound around the upper surface of the rotary blade of the brush cutter or around the lower part of the drive shaft case of the cord cutter. is there.

[0009]

[Means for Solving the Problems]

 The basic configuration of the present invention is that the rising edge is provided on the outer peripheral edge of the auxiliary blade main body having a mounting hole common to the mounting hole provided on the rotary blade, and the rising edge is low on the auxiliary blade main body side, and the auxiliary blade main body is low. Auxiliary blade for winding prevention of the brush cutter, which is characterized in that it is gradually raised as it moves away from it, and a saw blade is provided at the rising portion,

A rising part is provided on the outer peripheral edge of the auxiliary blade main body having a mounting hole common to the mounting hole provided on the rotary blade, and the rising part is low on the auxiliary blade main body side, and increases as the distance from the auxiliary blade main body increases. An auxiliary blade that is gradually raised and has a saw blade at the rising portion is attached to the mounting portion of the brush cutter main body, and a rotary blade is attached to the lower side of the auxiliary blade. In addition to the cutter for preventing the winding of the dispenser,

A cord cutter case having a shape in which a taper surface is inclined downward from the inner side toward the outer side on the lower side of the drive shaft case of the brush cutter main body, and the cord case. A rising portion is provided on the outer peripheral edge of the auxiliary blade body that has a mounting hole that is common with the mounting hole provided on the case for the cutter, and this rising portion is low on the auxiliary blade body side and It is gradually raised as it goes away, a saw blade is provided at the rising portion, and a downward blade portion corresponding to the taper surface of the above-mentioned code cutter case is provided on the outer peripheral edge of the auxiliary blade body. An auxiliary blade is provided on the drive shaft case of the brush cutter main body, and the auxiliary blade is attached to the drive shaft case (not shown) of the brush cutter main body, and the cord cutter case is provided below the drive shaft. Is attached, and the downward blade of the auxiliary blade described above follows the taper surface of the code cutter case. A cutter for preventing winding of a brush cutter, which is characterized by being supported as described above, is also mentioned.

[0012]

First Embodiment The details of the present invention will be described with reference to FIGS. 1 to 3 showing a first embodiment. FIG. 1 is a plan view of an auxiliary blade used together with a so-called rotary blade mounted on a mounting shaft of a brush cutter, FIG. 2 is a side view showing the usage state of FIG. 1, and FIG. It is an AA line sectional view.

As is clear with reference to FIG. 2, a disk-shaped auxiliary blade body 12 having a diameter smaller than that of the rotary blade 10 is provided, and the mounting portion 18 of the rotary blade 10 is provided at the center thereof. A mounting hole 14 common to the mounting hole (not shown) is provided. Although the auxiliary blade main body 12 is shown as a circular one, it is not limited to a circular shape and may have any shape such as a square or an ellipse.

As is apparent from FIGS. 1 and 3, a rising portion 16 inclined outward is provided on the outer peripheral edge of the auxiliary blade body 12 described above.

As is apparent from FIG. 2, the rising portion 16 gradually rises from one side to the other side, but the auxiliary blade body 12 side is low and the rising portion 16 is It is set higher as it moves away from it.

A saw blade 20 is formed on the rising portion 16.

Therefore, a method of using this embodiment will be described in combination with the rotary blade 10. As is apparent from FIG. 2, the mounting hole 14 of the auxiliary blade 22 having the above-described configuration is mounted on the mounting portion 18 of the brush cutter main body 24.

In this case, the saw blade 20 side provided on the auxiliary blade 22 is arranged on the brush cutter main body 24 side.

Next, the mounting hole of the rotary blade 10, which is generally widely used, is attached to the mounting portion 18 common to the auxiliary blade 22, and the both 10 and 22 are attached to the drive shaft (not shown) of the brush cutter main body 24. It is tightened through fixing means 19 such as bolts (see FIG. 2).

Therefore, the operation of the state in which the both 10 and 22 are combined will be described. The auxiliary blade 22 is rotated together with the rotary blade 10 by the drive source.

When the grass is cut in this state, the rotary blade 10 surely performs the primary cutting of the grass, but as described above, the grass cut by the rotary blade 10 is made to fall and the brush cutter main body is cut. It is not uncommon for 24 to be caught on the upper surface side of the mounting portion 18.

In particular, grass is likely to wind around the upper surface base of the mounting portion 18 provided upright with respect to the horizontal rotary blade 10.

However, in this invention, the saw blade 20 is inclined outward as described above around the upper surface of the mounting portion 18, and the height thereof is gradually increased. The cut grass that is about to be wound on the upper surface side does not scatter upward and is secondarily cut by following the saw blade 20.

In particular, since the blade provided on the rising portion 16 is not the flat blade but the saw blade 20, even grass such as hard stalks can be cut by catching the grass.

This means that the present invention is equivalent to the function of a so-called “saw-toothed sickle” in contrast to the function of a “flat blade sickle”.

Although the rising portion 16 of the auxiliary blade 22 in the first embodiment is inclined outward, it is not limited to the inclination, and for example, an arbitrary angle from a substantially horizontal shape to an upright shape can be obtained. The inventor also plans to install it in.

Furthermore, the shape of the auxiliary blade body 12 is not limited, and the number of the rising portions 16 is not limited. It suffices if there is at least one rising portion 16 provided with the saw blade 20.

Further, the shape and bending angle of the saw blade 20 may be set arbitrarily.

Furthermore, since the auxiliary blade 22 of the present invention can be manufactured from a single plate, it is very economical in terms of manufacturing cost.

[0030]

Second Embodiment FIG. 4 is a plan view, FIG. 5 is a sectional view taken along line BB of FIG. 4, and FIG. 6 is a side view showing a usage state.

In this embodiment, a cord cutter has a taper surface 30 on the drive shaft case 28 (see FIG. 6) side of the brush cutter main body, in which the outer peripheral side is inclined downward from the inside toward the outside. It is applied to the code cutter case 32 of the so-called.

The configuration of the auxiliary blade 34 is slightly different from the auxiliary blade 22 of the first embodiment in the essence of the invention, but some improvements are made.

A rising portion 16 is provided at the outer peripheral edge of the auxiliary blade main body 12 having a mounting hole 14 common to the mounting hole (not shown) provided in the code cutter case 32 for accommodating the code 38. Two rising portions 16 are provided on the side of the auxiliary blade main body 12 which is low, and is gradually increased as the distance from the auxiliary blade main body 12 increases.

In this embodiment, as is apparent from FIG. 5, the rising portion 16 is inclined outward, but it is not always necessary to incline, and the rising portion 16 is changed from a substantially horizontal shape to a substantially upright shape. The inventor also plans to provide it at any arbitrary angle.

Further, the number of the rising portions 16 is not limited to two, and at least one may be provided.

A saw blade 20 is provided on the rising portion 16 as in the first embodiment.

On the outer peripheral edge of the auxiliary blade body 12, two downward blade portions 36 corresponding to the taper surface 30 of the code cutter case 32 are provided in the intersecting direction with the saw blade 20. . Of course, it does not mean that the downward blade portion 36 is limited only to the crossing direction of the saw blade 20.

An auxiliary blade 34 is attached to a drive shaft (not shown) in the drive shaft case 28 of the brush cutter main body, and a code cutter case 32 is attached below the drive shaft. In this case, however, the downward blade portion 36 of the auxiliary blade 34 is provided so as to follow the taper surface 30 of the cord cutter case 32.

The operation of this embodiment will now be described. Although the grass is primarily cut by the rotating cord 38, the case for the cord cutter out of the grass to be wound around the attachment portion side. The cutting grass scattered on the side of the taper surface 30 of 32 is secondarily cut by the blade 40 of the downward blade portion 36 of the auxiliary blade 34, and further captured and cut by the blade 40 of the downward blade portion 36. The grass cut due to the leakage tries to wind toward the lower side of the drive shaft case 28, but in this case, it does not wind up because it is tertiary cut following the saw blade 20 of the auxiliary blade 34.

[0040]

[Effect of device]

 Since the present invention has the above-mentioned configuration, it has the following advantages. (1) The rising part is low on the auxiliary blade body side and gradually rises as it moves away from the auxiliary blade body. Since the rising part is provided with a saw blade, the cut grass after cutting is cut into a saw blade. Since it is followed and cut reliably, it is possible to avoid winding around the mounting portion side. (2) Since the auxiliary blade and the rotary blade are configured independently of each other, they can be easily replaced and used. (3) Since the downward blade part is provided near the outer periphery of the auxiliary blade, it is possible to cut the grass that is about to wind around the attachment part of the cord cutter while waiting for the downward blade part and the saw blade. Therefore, it is also possible to cut the grass that is going to be wound around the drive shaft.

[Brief description of drawings]

FIG. 1 is a plan view of an auxiliary blade used together with a so-called rotary blade mounted on a mounting shaft of a brush cutter.

FIG. 2 is a side view showing a use state of FIG.

3 is a sectional view taken along the line AA of FIG.

FIG. 4 is a plan view.

5 is a sectional view taken along line BB of FIG.

FIG. 6 is a side view showing a usage state.

[Explanation of symbols]

 10 rotary blade 12 auxiliary blade body 14 mounting hole 16 rising portion 18 mounting portion 20 saw blade 22 auxiliary blade 24 brush cutter main body 28 drive shaft case 30 taper surface 32 cord cutter case 34 auxiliary blade 36 lower Facing blade

Claims (3)

[Scope of utility model registration request] 1. A rising portion 16 is provided on an outer peripheral edge of an auxiliary blade main body 12 having a mounting hole 14 common to a mounting hole provided on the rotary blade 10, and the rising portion 16 is low on the auxiliary blade main body 12 side, An auxiliary blade for winding prevention of a brush cutter, which is provided so as to be gradually higher as it goes away from the auxiliary blade main body 12 and has a saw blade 20 provided on a rising portion 16. 2. A rising portion 16 is provided on the outer peripheral edge of an auxiliary blade body 12 having a mounting hole 14 common to the mounting hole provided in the rotary blade 10, and the rising portion 16 is low on the auxiliary blade body 12 side, An auxiliary blade 22 that is gradually raised as it goes away from the auxiliary blade main body 12 and has a saw blade 20 provided on the rising portion 16 is attached to the mounting portion 18 of the brush cutter main body 24, and is attached to the lower side of the auxiliary blade 22. A cutter for wrapping prevention of a brush cutter, which is equipped with a rotary blade 10. 3. A taper surface 3 in which the outer peripheral side is inclined downward from the inside toward the outside on the drive shaft case 28 side of the brush cutter main body.
A rising portion on the outer peripheral edge of the auxiliary blade main body 12 having a code cutter case 32 having a shape of 0 and a mounting hole 14 common to the mounting hole provided in the code cutter case 32. 16 is provided, the rising portion 16 is low on the side of the auxiliary blade body 12 and is gradually raised as it goes away from the auxiliary blade body 12, and the rising portion 16 is provided with the saw blade 2
0 is provided and the above-mentioned core is provided on the outer peripheral edge of the auxiliary blade body 12.
It comprises an auxiliary blade 34 having a downward blade portion 36 corresponding to the taper surface 30 of the case 32 for the cutter, and the auxiliary blade 34 is attached to the drive shaft case 28 side of the brush cutter main body. And further below the drive shaft 28, a cord cutter case.
The blade 32 is attached to the downward blade portion 3 of the auxiliary blade 34 described above.
6. A cutter for preventing winding of a brush cutter, wherein 6 is supported so as to follow the taper surface 30 of the cord cutter case 32.