JPH0650417U - Wire cutting blade for brush cutter - Google Patents

Abstract

(57) [Abstract] [Purpose] While cutting grass, even if it comes into contact with a hard object, the blade will not be damaged or deformed, nor will it receive a large impact
We provide a line cutting blade for brush cutters that does not damage or cut plants and pillars if they are present, and is durable, has excellent sharpness, and can also cut a little hard bamboo bamboo or twigs. To do. [Structure] A flexible steel wire having an arbitrary length is formed into a coil shape, and both ends thereof are used as cutting blades, and one or more cutting blades are attached to predetermined positions of a disc, and one end thereof is provided. Wire cutting blade for brush cutters

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a cutting blade attached to a brush cutter or a mowing machine.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, as cutting blades for brush cutters and the like, there are known cutting blades provided with saw blades on the entire outer peripheral portion thereof, and blades provided with a plurality of blades on the outer peripheral portion of the disc. Then, the saw blade-shaped disc or the disc blade was rotated, and grass was cut by a blade formed on the outer peripheral portion. On the other hand, in cord-type mowers, a bobbin with a cord wound around it or a disc with a cord attached is known. Then, by rotating the bobbin and the disc, the cord was rotated and the grass was cut.

[0003]

[Problems to be solved by the device]

 Since the conventional disk-type mower uses a highly rigid disk for the blade, if there are hard objects near the grass to be mowed, the blade will come into contact with them and damage the blade. It was deformed and a big shock was generated. In addition, if there are plants or struts, there was a problem that they would be damaged or cut. On the other hand, with a grass cutting blade using a plastic cord, only soft grass can be cut, the sharpness is poor, and the cord is severely worn.Therefore, it is necessary to frequently replace the cord or feed it from the bobbin during work. However, it had the drawback of poor work efficiency.

[0004]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, the present invention is to form a coiled central portion of a flexible steel wire of arbitrary length, and use both ends as cutting blades, and one or more discs. It was installed at a fixed position, and one or both ends were discharged to the outside of the disc.

[0005]

Since the linear cutting blade for brush cutters of the present invention is configured as described above, when the disc rotates, the cutting blade attached to the disc rotates to cut grass, When this cutting blade comes into contact with a hard object such as stone, the cutting blade bends and escapes.

[0006]

【Example】

 The present invention will be described below with reference to the drawings showing an embodiment thereof. FIG. 1 is a front view of the first embodiment of the present invention with a cover removed, and FIG. 2 is a plan view. Reference numeral 1 is a cutting blade, which is formed by cutting a steel wire into an arbitrary length to form a straight line, and winding the central portion thereof into a coil several times. The circular plate 2 is a steel plate or a plastic plate. A hole for mounting the drive shaft 3 is formed in the central portion of the circular plate 2, and a boss 7 is provided on the outer periphery of the mounting hole 3. A pin 4 is hung vertically near the outer periphery of the disc 2 and the coil portion of the cutting blade 1 is externally fitted. Next, an inverted U-shaped fixture 5 is projectingly provided on the disk 2 radially inside the pin 4, and one end of the cutting blade 1 is inserted into the fixture 5. Further, a cover 6 made of a steel plate or a plastic plate is superposed on the upper surface of the disc 2. At the central portion of the cover 6, a mounting hole 3 for the drive shaft is provided in the same manner as the disc 2. If the cutting blade 1 is damaged during use, flip the cutting blade 1 over and use again. If the blades at both ends are damaged, replace them with new blades.

FIG. 3 is a front view showing a state in which the cover 6 of the second embodiment using two cutting blades 2 is removed. Pins 4 are vertically provided at two positions in the vicinity of the outer peripheral portion on the plane of the disk 2, symmetrically with respect to each other, and an inverted U-shaped fixture 5 is projectingly provided on the disk 2 on the radially inner side of the pin 4. Next, the coil portions of the two cutting blades 1 are fitted onto the pins 4, and one end of each cutting blade 1 is inserted into the fixture 5. Although the two cutting blades 1 are used in the second embodiment, three or more cutting blades 1 may be attached.

[0008]

[Effect of device]

 As described above, in the present invention, the central portion of the steel wire is coiled, and the cutting blade portions at both ends thereof have elasticity and flexibility, so that the cutting blade made of steel wire is a solid object. Even if you touch it, the steel wire cutting blade will elastically deform and bend, scattering stones, cans, etc. that come into contact with it, and not damaging hard objects, etc. It can be used without doing. Furthermore, compared with the blades made of nylon rope, which have a short lifespan and are easily damaged, the blades of the present invention are durable and have excellent sharpness, and can cut a little hard bamboo or twig. Therefore, there is an effect that it has a long life and can be used for a comparatively long time without frequently changing or extending the rope.

[Brief description of drawings]

FIG. 1 is a front view showing a first embodiment of the present invention with an upper cover removed.

FIG. 2 is a plan view showing a first embodiment of the present invention.

FIG. 3 is a front view showing a second embodiment of the present invention with an upper cover removed.

[Explanation of symbols]

 1 Cutting blade 2 Disc 3 Mounting hole 4 Pin 5 Fixing tool 6 Cover 7 Boss

Claims (2)

[Scope of utility model registration request] 1. A flexible steel wire having an arbitrary length is formed into a coil shape, and both ends thereof are used as cutting blades. The cutting blades are attached near the outer periphery of the disk. A linear cutting blade for a brush cutter having a structure of discharging outwardly. 2. A linear cutting blade for a brush cutter according to claim 1, wherein a plurality of cutting blades are attached near the outer circumference of the disk.