JPH0627U - Brush cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] An object of the present invention is to provide a brush cutter capable of improving productivity and reducing cost by integrating a grip or a grip and a fan cover of a prime mover with an outer pipe. [Structure] A grip 5 is integrally formed on a rear portion (on the side of a prime mover 4) of an outer pipe 1 of a brush cutter manufactured by using a carbon fiber reinforced resin (carbon fiber).

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a brush cutter having a rotary blade connected to one end side of an outer pipe and a prime mover rotatingly driving the rotary blade at the other end side.

[0002]

[Prior art]

 In this type of brush cutter, the outer pipe connecting the gear case that supports the rotary blade and the prime mover that drives the rotary blade to both ends has a separate grip, a fan cover for the prime mover, and a fan cover for the prime mover. The throttle lever holder, etc., to which the prime mover throttle lever is attached, is fixed by fitting and fittings.

[0003]

[Problems to be solved by the device]

 As described above, in the conventional brush cutters, the grip, fan cover, throttle lever holder, etc., which are separately formed on the outer pipe, are fixed by fitting or mounting metal fittings. The cost was high because it had to be managed, and the productivity was poor because the assembly work required time.

The present invention has been made for the purpose of solving the problems described above, and facilitates the assembly of a grip, a fan cover, a throttle lever holder, etc., to an outer pipe, thereby reducing the cost and improving the productivity. It is intended to provide a mower that can be used.

[0005]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention according to claim 1 rotatably connects a rotary blade to one end of an outer pipe via a gear case, and a rotary shaft inserted inside to the other end. In the bush cutter, which is connected to a prime mover that rotationally drives the rotary blade, a grip is formed integrally with the outer pipe.

Further, in the present invention according to claim 2, the rotary blade is rotatably connected to one end side of the outer pipe via a gear case, and the rotary blade is attached to the other end side via a rotary shaft inserted inside. In a brush cutter that is connected to a prime mover that rotates, a grip and a fan cover of the prime mover are integrally formed on a side of the outer pipe that is connected to the prime mover.

[0007]

[Action]

 According to the present invention, productivity can be improved and cost can be reduced by integrally forming the grip on the outer pipe or the grip and the fan cover of the prime mover.

[0008]

【Example】

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

<First Embodiment> FIG. 1 is a perspective view showing a brush cutter according to a first embodiment of the present invention. As shown in this figure, a rotary blade 3 is rotatably connected to the tip end side of the outer pipe 1 via a gear case 2, and a rotary shaft (shown in the drawing) is inserted inside the rear end side of the outer pipe 1. A prime mover 4 for rotationally driving the rotary blade 3 is connected via (omitted).

The outer pipe 1 is formed of a carbon fiber reinforced resin (carbon fiber), and a grip 5 for an operator to grip at the time of work is integrally formed on the motor 4 side of the outer pipe 1. Has been done.

Then, the worker hangs the prime mover 4 side from the shoulder with a suspension band (not shown), grips the grip 5, and cuts grass on the ground surface with the rotary blade 3 which is rotated by the rotational driving force of the prime mover 4. Do the payment work.

Next, the procedure for producing the outer pipe 1 made of carbon fiber reinforced resin integrally formed with the above-mentioned grip 5 will be described with reference to FIGS. 2 (a), (b), (c), (d) and (e). ), (f).

First, an outer pipe core metal 20 having an integrated grip is manufactured (FIG. 2 (a)), and a sheet 21 in which carbon fiber is impregnated with a matrix resin is wound around the core metal 20 (FIG. 2 (a)). b)), a heat-shrinkable tape 22 is wound on it, and then heat-cured to remove the core metal 20 (FIGS. 2 (c) and 2 (d)). Then, the tape 22 is peeled off, and the surface of a required portion is dimensioned and polished (FIG. 2 (e)) to form the outer pipe 1 with which the grip 5 is integrated (FIG. 2 (f)).

As described above, in this embodiment, since the outer pipe 1 and the grip 5 are integrated by using the carbon fiber reinforced resin, the weight can be reduced, and the grip 5 is attached to the outer pipe 1. Since the work can be omitted, the productivity is improved, and it is not necessary to perform quality control of the dimensions of the outer pipe 1 and the grip 5 with high precision as in the conventional case, so that the cost can be reduced. Also, the strength can be kept almost the same as that of conventional aluminum or aluminum alloy.

In addition, a handle formed as a separate body may be attached to the outer pipe 1 with a fitting or the like.

Second Embodiment In the brush cutter according to the present embodiment, as shown in FIG. 3, the outer pipe 1, the grip 5, and the fan cover 6 of the prime mover 4 are integrally formed by using carbon fiber reinforced resin. Other configurations and effects are the same as those of the first embodiment shown in FIG.

Also in this embodiment, the manufacturing procedure of the outer pipe 1 in which the grip 5 made of the carbon fiber reinforced resin and the fan cover 6 are integrally formed is the same as in the above-described embodiments, as shown in FIGS. As shown in (c), (d), (e), and (f), an outer pipe core metal 20 with an integrated grip and fan cover was manufactured (Fig. 4 (a)), and carbon fiber contained matrix resin. The dipped sheet 21 is wrapped around the cored bar 20 (FIG. 4 (b)), a heat shrinkable type tape 22 is wound on the cored bar 20 and then heat-cured to remove the cored bar 20 (FIG. 4 (c), (d)). Then, the tape 22 is peeled off, and the surface of the required portion is dimensioned and polished (FIG. 4 (e)), whereby the outer pipe 1 in which the grip 5 and the fan cover 6 are integrated is formed (FIG. 4 (f)). .

<Third Embodiment> In the brush cutter according to the present embodiment, as shown in FIG. 5, a carbon fiber reinforced resin is used to adjust the rotational driving force of the outer pipe 1, the grip 5, and the prime mover 4. The throttle lever holder 8 to which the throttle lever 7 is attached is integrally formed, and other configurations and effects are similar to those of the first embodiment shown in FIG.

Also in this embodiment, the outer pipe 1 made of carbon fiber reinforced resin in which the grip 5 and the throttle lever holder 8 are integrally formed can be manufactured in the same manner as the above-mentioned embodiment.

Further, in this embodiment, the fan cover 6 shown in the second embodiment may be integrally formed with the outer pipe 1 made of carbon fiber reinforced resin in which the grip 5 and the throttle lever holder 8 are integrally formed. Good.

Further, in the case of the brush cutter in which the handle 9 is attached to the outer pipe 1 as shown in FIG. 6, for example, by forming the outer pipe 1 with the carbon fiber reinforced resin as in each of the above-mentioned embodiments. A handle bracket portion 10 for attaching the handle 9 to the outer pipe 1 is integrally formed in the same manner as in the above-mentioned embodiment, and the handle 9 can be fixed to the handle bracket portion 10 by being attached by a mounting member 11. .

As described above, by integrally forming the handle bracket portion 10 on the outer pipe 1, the work of attaching the handle 9 can be easily performed.

Further, as shown in FIG. 7, when the rotary blade 3 that rotates during work comes into contact with a small stone or the like, a large force acts on the tip side of the outer pipe 1 (near the gear case 2). Although the tip portion of the outer pipe 1 is easily deformed, by forming the outer pipe 1 with the carbon fiber reinforced resin as in the above-described embodiment, the tip portion 1a on which a large force acts can be easily and locally increased in diameter. Can be converted.

In addition, in FIG. 7, the diameter of the tip end side of the outer pipe 1 is partially increased, but the tip end side of the outer pipe 1 may be partially thickened.

[0025]

[Effect of device]

 As described above in detail with reference to the embodiments, according to the present invention, the outer pipe is formed with the grip, or the grip and the fan cover of the prime mover are integrated to improve productivity and reduce cost. Can be achieved.

[Brief description of drawings]

FIG. 1 is a perspective view showing a brush cutter according to a first embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a procedure for manufacturing an outer pipe of the brush cutter according to the first embodiment of the present invention.

FIG. 3 is a perspective view showing an outer pipe of a brush cutter according to a second embodiment of the present invention.

FIG. 4 is an explanatory view showing a procedure for manufacturing an outer pipe of a brush cutter according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing an outer pipe of a brush cutter according to a third embodiment of the present invention.

FIG. 6 is a perspective view showing a main part of an outer pipe of a brush cutter according to a modification of the present invention.

FIG. 7 is a perspective view showing a main part of an outer pipe of a brush cutter according to a modification of the present invention.

[Explanation of symbols]

 1 Outer Pipe 2 Gear Case 3 Rotating Blade 4 Motor 5 Grip 6 Fan Cover 7 Throttle Lever 8 Throttle Lever Holder 9 Handle 10 Handle Bracket 20 Core Bar 21 Sheet 22 Tape

Claims (2)

[Scope of utility model registration request] 1. A mowing in which a rotary blade is rotatably connected to one end side of an outer pipe via a gear case, and a prime mover for rotationally driving the rotary blade is connected to the other end side via a rotary shaft inserted inside. A brush cutter, wherein a grip is formed integrally with the outer pipe. 2. A mowing in which a rotary blade is rotatably connected to one end side of an outer pipe via a gear case, and a prime mover for rotationally driving the rotary blade is connected to the other end side via a rotary shaft inserted inside. A brush cutter, wherein a grip and a fan cover of the prime mover are integrally formed on a side of the outer pipe connected to the prime mover.