JP5690017B1 - Brush blade - Google Patents

Abstract

In a cutting blade, each time the cutting edge is polished, the size decreases and the cutting efficiency decreases. It is difficult to polish the edge of a tip saw. The cut-off blades are replaced with several replacement blades, but several heavy and bulky blades must be carried around, and the cutting edges are polished together, but it takes time and effort. Is big. In addition, only the blade tip is used and the rest is discarded, so that effective use is desired in terms of resources and costs. There are provided a plurality of U-shaped members and nail holes alternately for fitting the replacement blades on the outer periphery of the brush blade body so that only the cut edge can be easily attached and detached, and fitted into the nail holes. The holding blades having the L-shaped claws to be fitted together are used to hold the replacement blades together so that they can be easily attached and detached. In addition, since it is a small replacement blade, it is predicted that the replacement blade may be lost or displaced during replacement. Therefore, if the replacement blade is magnetized, it can be temporarily fixed and the replacement operation can be performed smoothly. . [Selection] Figure 1

Description

 The present invention relates to a blade of a brush cutter in which a brush blade body is improved so that only the cutting edge of the brush blade can be replaced, and a replacement blade with a blade can be replaced so that the blade does not have to be polished.

 Cutting blades are mainly cutting blades, carbide tipsaws, and nylon cords. Cutting blades cut very well, but each time the cutting edge is polished, the size becomes smaller and the mowing efficiency drops, expensive steel, grinders and sanders are wasted and it takes a lot of time to polish a number of cutting edges It has become.

 Carbide cutting saws can be used as they are at the time of purchase until the blade size is not as small as the cutting blade and there is no cutting edge. However, it is difficult for amateurs to use a diamond file to polish the cutting edge.

JP-A-8-51832 JP 2002-86389 A JP2013-51886

Is there a good way to mow without polishing the cut edge?

The cutting blade becomes smaller each time the cutting edge is polished. Is there a way to keep the size as purchased?

Is there a way to avoid having to carry several heavy and bulky brush blades for replacement? I want to work as lightly as possible.

The tip saw is discarded even if the main body is not damaged when the cutting edge is worn. The cutting blade is also discarded when the size is reduced to some extent. I want to eliminate waste of resources.

In order to achieve the above object, the present invention has a structure in which the blade of the brush cutter uses the following replacement blade. A plurality of U-shaped members and nail holes for accommodating replacement blades on the outer periphery of the brush blade main body are provided alternately, and the replacement blade is sandwiched by a holding member having an L-shaped nail that fits into the nail holes. It is.

Although the replacement blade is fitted into the fixed U-shaped member, the cutting blade is expected to scatter due to the centrifugal force rotating at high speed, so the replacement blade is as shown in FIGS. And a U-shaped member, or between the replacement blade and the brush blade main body, and a shape that prevents the replacement blade from scattering by centrifugal force.

Since the replaceable blade is small, displacement, dropout, or loss is expected during replacement of the replaceable blade. In order to prevent this, the replacement blade is magnetized.

When the replacement blades are replaced, the replacement blades are firmly clamped by inserting and engaging the claws that have come out in the L shape from the pressing member into the holes formed in the outer periphery of the brush blade main body.

The presser member can be turned around by placing a finger in the hole formed in the presser member when the presser member is fitted into the nail hole formed in the outer peripheral portion of the brush blade main body.

At that time, in order to prevent the cutter blade body from rotating together, a hole is also made in the cutter blade body so that it can be gripped firmly with a finger. This hole also serves as a hole for meat removal.

A member corresponding to a blade for preventing wrapping is provided in a state where the grass is not wrapped around the center portion of the pressing member in a state where the blade is erected in the rotational axis direction of the brush blade.

When the cutting edge is cut off by using a replacement blade, the cutting edge does not need to be polished by replacing only the cutting edge.

By magnetizing the replaceable blade, it is not necessary for the small replaceable blade to be displaced or lost during replacement. In addition, when a replaceable blade is set on the U-shaped member, it can be temporarily fixed in place by the effect of the magnet.

By providing a U-shaped member, the replacement blade can be fixed accurately and reliably without rattling, and further, even if the replacement blade is subjected to an impact during cutting, it can be prevented from being shaken.

By using a replacement blade, the size of the blade edge is reduced each time the cutting edge is polished like a cutting blade, so that the cutting efficiency is not reduced, and the size as purchased can be maintained.

Without having to carry many heavy and bulky replacement blades during work, you can carry small spare blades in your pocket and carry them easily.

The blade provided in the axial direction to the center portion of the pressing member rotates to prevent the grass from being wound.

Furthermore, until now, when replacing the brush cutting blade, the outer periphery of the blade has been replaced with great care so as not to be injured with fingers. The cutter blade can be gripped strongly, and the blade can be replaced and the blade can be attached and detached from the brush cutter with confidence.

The pressing member can be tightened without difficulty by making a hole in the pressing member.

The cutting blades were discarded when the cutting edge was polished to some extent and the size became smaller. In addition, when the blade edge of the tip saw is worn, it is discarded even if the main body is not damaged, and valuable resources are wasted. However, this problem can be solved by using a replacement blade. In addition, the steel material is effectively used, leading to cost reduction.

Brush blade main body top view Brush cutting blade completion forecast sketch Holding member plan view Predicted overlap of parts near the blade Combination example 1 of U-shaped member and replaceable blade Combination example 2 of brush cutter blade and replacement blade Replacement blade combination example 3

First, a plurality of U-shaped members 3 and claw holes 5 are alternately provided on the outer peripheral portion of the cutting blade main body 1, and a U-shaped member 3 having a presser member 8 having L-shaped claws 9 fitted into the claw holes 5. The replacement blade 11 set inside is inserted.

The replacement blade 11 is magnetized.

As shown in FIG. 5, the dent 13 and the lateral protrusion 15 are provided between the replaceable blade 11 and the U-shaped member 3.

Structure of the replaceable blade 11 As shown in FIG. 6, the U-shaped member 3 is fixed so as to surround the hole 15 -B opened in the outer peripheral portion of the brush blade main body 1 as shown in FIG. There is a structure in which a portion bent into the mold 13-B is fitted into the hole 15-B.

Similarly, as the third embodiment of the replaceable blade 11, the U-shaped member 3 is fixedly provided on the replaceable blade 11 so as to surround the protrusion 15-C provided on the outer peripheral portion of the brush blade main body 1 shown in FIG. There is a structure that fits into the hole 13-C of the replacement blade.

Further, as an example of the U-shaped member 3, when the length of the replaceable blade 11 is short, the back of the replaceable blade 11 is guarded by lengthening one side of the replaceable blade 11 in order to reduce rattling and chatter. There is.
That is, the U-shaped member 3 is not limited to a shape, and various similar shapes are conceivable.

After the replaceable blade 11 is set in the U-shaped member 3, the L-shaped claw 9 coming out from the presser member 8 is inserted into the claw hole 5 of the brush blade main body 1, the hole 7 of the presser member is gripped and turned. The blade 11 is sandwiched and fixed by fitting the brush blade main body 1 and the pressing member 8. See FIG.

A plurality of wrapping preventions 10 provided in the rotation axis direction are provided at the center of the pressing member 8.

After that, when a screw is inserted into the screw hole 4 and tightened, a single blade is obtained.

The pressing member 8 has a hole 7 for the pressing member to which a finger for turning and tightening is applied.

A main body hole 6 is sized so that the brush blade main body 1 can be touched by a finger.

1 Brush blade body 2 Hole to be attached to the brush cutter
3 U-shaped members
4 Screw hole 5 Claw hole 6 Hole in main body 7 Hole in pressing member 8 Holding member 9 L-shaped claw 10 Anti-winding 11 Spare blade 12 Blade 13 Recess 13-B L-shaped
13-C Spare blade hole 14 Inserting the spare blade 15 Lateral protrusion 15-B Hole 15-C Protrusion

Claims (3)

 Provide a plurality of U-shaped members and claw holes alternately on the outer periphery of the brush blade main body, and have a holding member having an L-shaped claw to be fitted in the claw hole. A brush blade characterized in that it can be fixedly attached to and detached from the blade.  The brush cutter according to claim 1, wherein a replacement blade used as the brush cutter is magnetized.  The cutting blade according to claim 1, wherein a wrapping preventing member is erected in the direction of the rotation axis of the central portion of the cutting blade.

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