JPS5933227Y2 - brush cutter - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a brush cutter, and more specifically, to a brush cutter that facilitates brush cutting work.

A brush cutter has a rotatable cutting blade attached to one end of the main rod and an engine attached to the other end, and the output of this engine is transmitted to the cutting blade to rotate it.The operator supports the main rod with both hands. The cutting blade is rotated and used for mowing weeds, shrubs, etc. while the cutting blade is rotated in a swinging motion centering on the body.

Although these types of brush cutters are made to be lightweight to reduce the physical burden such as worker fatigue, they do not have a cutting blade with a gear unit at one end, and a high-speed rotating engine at the other end. The load during actual operation is
It feels quite heavy compared to the load when it is stationary.

Therefore, if the swing motion is carried out over a long period of time during brush cutting work, the operator, more specifically the arm supporting the brush cutter, will become considerably fatigued.

The cause of this fatigue is lifting a heavy brush cutter and swinging it, so even if the weight cannot be made extremely light, if swinging can be done easily, the fatigue will be reduced. significantly reduced.

From this point of view, this invention aims to reduce the physical fatigue of workers by providing a brush cutter that is easy to swing. It is rotatable within a plane containing the rod, or a plane in a region close to this plane, and the rear rod is rotatable within a plane perpendicular to the axis of the main rod, or a plane close to this. It is characterized in that the end of the cutting blade can be swung by pulling on each handle rod.

The details of this invention will be explained below with reference to the attached drawings.

First, in the figure, reference numeral 1 indicates a hollow main rod, to which a cutting blade unit 2 is attached to one end, and an engine unit 3 is attached to the other end 1, respectively.

The output of the engine unit 3 is transmitted to the cutting blade 21 of the cutting blade unit 3 by a flexible transmission shaft inserted into the main rod 1.

A bracket 4, which is fixed by fastening the main rod 1, is fixed to the middle part of both ends of the main rod 1. Support piece 4
1 is formed, and a hollow handle rod holder 43 is pivotally supported on this support piece 41 via a pin 42. By reducing the diameter of the handle rod holder 43 with a bolt 44, the end of the excavation handle rod 5 is formed. The parts are fastened.

These two hands...Ndol rod 5...Pin 4 of Ndol rod holder 43
2 (arrow xx' in the figure), and is provided with a grip 51 at the other end.

Furthermore, when the two-handed handle rod 5 is brought closest to the main rod 1, a boss 6 that can rotate around the main rod 1 is attached to the main rod 1 at a position that is aligned with the grip 51. There are stoppers 61 at both ends of the main rod 1 to prevent it from moving along the axial direction, and the front stopper 61 is formed with a layered band receiver 62, and a layered band 63 is formed on the front stopper 61. It is locked.

One end 7a of an L-shaped rear end 7a is fitted and fixed to the boss 6, and a grip 71 is fixed to the other end 7b of the rear end 7.

Further, a grip 8 for engaging the two-handed handle rod 5 is attached to the front stopper 61 at a position slightly closer to the cutting blade unit, and this grip 8 has a pair of spring pieces 8.
1 can hold the handle rod 5 with both hands.

Next, actual work using the brush cutter according to this invention will be explained.

First, the worker puts on the layering band 63, and if he is right-handed, uses his left hand as both hands to grip the grip 51 of the handle rod 5, and his right hand as his rear hand to grip the grip 71 of the rear handle rod 7.

In this case, the boss 6 to which the rear handle rod 7 is fixed is located near the right hip, and the length of the band 63 is set so that the right hand is in an S-bend position and the left hand is in a downward position. Adjust the brightness.

Then, when performing grass cutting work, when swinging the cutting blade 21 of the cutting blade unit 2 to the left side of the worker, both hands... pull the handle rod 5 towards the operator's hand, and
Rear move: When turning the handle rod 7 in the direction of arrow Y and slightly pushing it out, the cutting blade 21 smoothly rides on the swing trajectory.
To swing to the right, push the handle lever 5 with both hands, and pull the handle lever 7 with your back hand while rotating it in the Y' force direction.

Further, when storing the brush cutter, the front half handle 5 is held and integrated with the spring piece 81 of the grip 8, making it convenient to pack.

In the above explanation, a brush cutter using a flexible transmission shaft has been described, but the invention is not limited to this type of brush cutter, and the same applies even to a brush cutter having a straight main pipe.

As is clear from the above explanation, according to the brush cutter of this invention, both hands can be attached to the main rod. ...The handle rod is perpendicular to the plane that includes the movement of the two-handed handle rod,
Alternatively, since the brush cutter can be rotated in a plane perpendicular to each other, the swing operation of the brush cutter does not rely solely on the rotational movement of the waist, but can also be performed by extending and contracting the arm. Local fatigue can be prevented.

[Brief explanation of the drawing]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the brush cutter of the accompanying drawing. 1... Main rod, 2... Cutting blade unit, 3
...00. Engine unit, 4...Bracket, 41...Support piece, 42...Pin, 43...Handle lever holder, 5...Both hands Handle rod, 51...Grip, 6...
・Boss, 61...Stomber 7...Rear handle lever, 71...Grip, 8...
・Clip, 81...Spring piece.

Claims (1)

[Scope of utility model registration request] In a brush cutter equipped with a main rod that houses a transmission shaft that transmits the output of an engine attached to one end and has a cutting blade attached to the other end, the shaft of the main rod is An excavation handle rod that is movable along the width direction of both hands in a plane that includes the center or a plane close to this plane, and that is pivoted to the engine spine from this handle rod and is orthogonal to the axis of the main rod. ,
Alternatively, a brush cutter is characterized in that it is equipped with a rear handle lever that is movable in a plane that is substantially perpendicular to the rear handle lever to facilitate swing movement during blade cutting work.