JPH0130993Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a brush cutter, and in particular, it enables flexible operation using two rods equipped with a sub-rod, similar to the brush cutter shown in Japanese Patent Publication No. 46-8403. The aim is to further expand the operating range of the blade head and to improve its workability. The present invention can also be applied to conventional backpack-type, shoulder-type, and hand-held brush cutters.

The configuration of the present invention will be explained below according to the embodiments shown in the drawings.

The brush cutter of the present invention can cut not only flat dust but also grass on various slopes more easily and more efficiently than before.

FIG. 1 shows the structure of a backpack-type brush cutter according to an embodiment of the present invention, in which an engine 1 is mounted on a backpack rack 15, a power extraction device 16 is provided, and a flexible power transmission shaft is inserted into the main rod 7. The main rod 7 is connected to the power take-off device 16 through a flexible tube 17, and the transmission shaft 2 is inserted into the outer tube 6 of the main rod 7, and a rotatable retainer is connected to the flexible tube 17. It is connected by applying.

The main rod 7 has a cutting blade head 5 in which the transmission shaft 2 is inserted and a gear device (not shown) is installed at the tip.
is provided to rotate the cutting blade 4.

As shown in FIGS. 2 and 3, the cutting blade head 5
A mounting bracket 8 is fixedly attached to the main rod 7 nearby, and one end of a joint intermediate member 10 is connected to the upper surface of the fixture 8 so as to be rotatable in a horizontal plane via a support shaft 11, and the other end of the joint intermediate member 10 is connected The sub-rod 14 is rotatably connected in a vertical plane by the support shaft 12 via the integral mounting bracket 9, so that the sub-rod 14 can swing freely in a wide range in the vertical and horizontal directions. There is. That is, the secondary rod 14
is connected to the main rod 7 via a universal joint 13 that allows two-way combination movement. The main and secondary rods are designed to have a length that allows the user to operate the main rod by holding the secondary rod under his or her elbow or armpit.

Thus, holding the main rod 7 in your right hand, holding the secondary rod 14 under your left elbow or armpit to support the weight of the cutting blade head 5 and keeping an appropriate distance from the ground, move along the ground in left, right, or up and down directions. It can move forward and backward while swinging in an arc to cut grass.

This structure ensures the support of the brush cutter, and allows users to work naturally without straining their working postures in various locations.
Therefore, since the main and auxiliary rods are connected via the universal joint, a wide range of rotations α and β can be made around the respective pivots by freely merging the two rods, and the cutting blade 4
It is possible to turn almost horizontally and vertically, and can handle any slope. The secondary rod 14 contributes to securing the posture of the main rod 7 during such operations, allowing the user of the backpack type brush cutter to work naturally without straining his or her working posture. For example, when mowing grass on a sloped surface using a conventional fixed handle, the user must tilt his/her arms and upper body as well as tilt the handle. The main and sub-rods according to the present invention can eliminate such unnatural work.

In the above embodiment, a backpack-powered brush cutter has been described, but the present invention can be similarly applied to a fixed handle type conventional hand-held or shoulder-type brush cutter shown in FIG.

As described above, according to the configuration of the present invention, the main rod and the sub-rod are connected to the mounting bracket attached to the tip of the main rod via a joint intermediate having a simple and durable structure.
By combining simple operations such as swinging the sturdy secondary rod vertically and horizontally, the main rod can be freely controlled to make work easier, expand the range of mowing work, and move the secondary rod Since no twisting operation is required, wrist fatigue is reduced, and this combined with the ease of the work mentioned above has great practical effects, such as reducing the number of accidents.

[Brief explanation of drawings]

FIG. 1 is a perspective view of a backpack-type brush cutter showing one embodiment of the present invention, and FIG. 2 is a partial side view of its main parts.
FIG. 3 is a plan view of essential parts, and FIG. 4 is an overall view of a conventional hand-held or shoulder-held brush cutter. DESCRIPTION OF SYMBOLS 1... Engine, 2... Transmission shaft, 3... Gear device, 4... Cutting blade, 5... Cutting blade head, 6... Outer pipe,
7...Main rod, 10...Joint intermediate, 14...Secondary rod.

Claims (1)

[Scope of utility model registration request] A main rod with a transmission shaft connected to the engine inserted therein and a gear device at the tip of the main rod that rotates the cutting blade, a mounting bracket attached to the tip of the main rod, and one end attached to the metal rod via a support shaft. A joint intermediate member which is connected and can swing freely within one plane, and a sub-rod whose end is connected to the other end of the intermediate member via a support shaft and which is freely swingable within another plane that intersects the plane. A brush cutter characterized by: