JP2526249Y2 - Grass mower weed prevention structure - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mowing machine, and more particularly to a mowing machine for attaching a flexible string-shaped cutter such as a nylon cutter to the outer periphery of a rotating disk.

[0002]

2. Description of the Related Art For cutting weeds and the like that grow on stony grounds, if a normal rotary blade is used, the blade is likely to be chipped. A so-called nylon cutter is used. That is, as shown in FIG.
At the rear end, a mixed gasoline engine E is mounted, and at the front end, a rotary disk 2 having a flexible string-shaped cutter 3 protruding from the surroundings is mounted. , And a shoulder band B provided rearward from the intermediate portion of the support rod 1 is hung on the shoulder, so that a U-shaped handle H
A mowing machine is widely used, in which the string-shaped cutter is held by grasping with both hands to bring the string-shaped cutter into contact with the vicinity of the weed root.

[0003]

However, if the above-mentioned nylon cutter is used, the mowing weeds are cut off to cut the weeds, or the cut weeds get entangled in the cutter holder and stop the operation. Therefore, it is proposed to attach a cover to be attached to the holder when using a metal blade. However, it is necessary to keep a fixed distance between the cover fixed to the tip of the support rod and the cutter that is driven to rotate. In such a case, the cut grass is wrapped around the holder through the gap, and in that case, it is necessary to attach and detach the main body each time to remove the wrapped grass, and the removing operation becomes more difficult. Therefore, an object of the present invention is to provide a structure in which the cut grass does not become entangled with the mounting holder portion even when the above-mentioned nylon cutter or a similar string cutter is used.

[0004]

According to the present invention, there is provided a string cutter.
Surrounds the fine metal wire 31 and its outer periphery as shown in FIG.
From the tip 31a of the fine metal wire.
If you use an exposed part, you can cut grass
A cutting element is added to the shredding, and the entanglement rate with the holder
The engine was mounted at the rear end of a long support rod, and a rotating disk with a flexible string-shaped cutter protruding from the periphery was mounted at the front end. the is rotated is transmitted to the disk, the mowing machine to the cord-like cutter is held by shoulder belts and hand handle provided behind closer than the support rod intermediate portion into contact with the vicinity of weeds root
A string-shaped cutter has a thin metal wire and a resin layer surrounding its outer circumference.
And a part of the thin metal wire is exposed from the tip . <br/> Holder is nylon cutter
Since synchronization with is rotating with, stick grass clippings is seen fault
However, if a cutting blade is provided on this,
The grass to be attached is cut, and the entanglement can be eliminated. So
Here, the rotating disk is mounted on the tip of the support rod.
Oriented radially around the mounting holder, preferably radially
It is better to protrude the cutting edge.

[0005] The holder may be provided with one cutting blade, but a plurality of cutting blades may be provided with a predetermined interval. Protruding two diagonally opposite ones at a time, or one at every 120 or 90 degrees, is convenient for cutting tangled grass. The cutting blade is preferably oriented in the radial direction or at an angle of 30 degrees or less to cut entangled grass. The cutting edge shape is double-edged (see FIG. 3A) or single-edged (FIG. 3B)
Reference).

[0007]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
Will be described in detail. FIG. 2 is an exploded view of the weaving prevention structure according to the present invention, and a pair of string-shaped cutters 3 are attached to the rotating disk 2 at diagonal positions on the outer periphery thereof. As shown in FIG. 4, the string-shaped cutter 3 is a steel thin wire 3 having a diameter of 1 mm.
1 is provided with a 1 mm thick nylon resin coating 32 on the outer periphery,
The tip 31a of the steel wire 31 is exposed by about 5 cm.

Reference numeral 4 denotes a mounting holder which is screwed in a reverse thread to the rotating portion 11 when the rotating disk 2 is mounted on the tip of the support rod 1. The mounting holder 4 includes a flange portion 41 and a sleeve portion 42 protruding from the central portion thereof. becomes, the outer periphery of the flange portion 41 that is welded and fixed directed cutting edge 5 of both blades are radially 120 degrees apart.

After the holder 4 is screwed into the rotating part 11, the rotating disk 2 is rotated by the rotating disk 2.
And the mounting holder 6, washer 7 and nut 8 are fixed from below by bolts (not shown) to complete the mounting.

When the mowing machine having the above-described structure is used, the steel wire 31 is provided inside the nylon cutter, and the leading end thereof is exposed, so that the weed is cut rather than cut. Therefore, entanglement with the holder 4 is reduced. For example, even if grass is about to be entangled with the outer periphery of the holder 4, the cutting edge 5 that is directed in the radial direction is formed on the outer periphery of the holder 4.

[0011]

As is apparent from the above description, according to the present invention, a string-shaped cutter conventionally formed only of nylon is used.
Metal wire such as a thin steel wire inside the
The tip is exposed to increase the cutting efficiency of the cutter.
Reduce the amount of grass that is trying to get entangled in the ruder
Can be. Further, when the blades cut into holder entangled grass set <br/> only that, since the cutting by utilizing the rotation of the grass holder to be Karamitsuko, it is prevented with tangled grass with a simple structure it can. Therefore, it is possible to provide a practical mower that saves fuel and has high working efficiency.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a working state of a mower to which the present invention is applied.

FIG. 2 is an exploded view showing a main part of the weed prevention structure according to the present invention;

FIG. 3 is a plan view showing an attached state of a double-edged structure (a) and a single-edged structure (b) of a cutting blade attached to a holder.

FIG. 4 is a sectional view of a main part of the string-shaped cutter used in the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Support rod 2 Rotating disk 3 Nylon cutter 31 Fine metal wire 4 Holder 5 Cutting blade

Claims (3)

(57) [Scope of request for utility model registration] 1. An engine is mounted at the rear end of a long support rod, and a rotating disk with a flexible string-shaped cutter protruding from the periphery is mounted at the distal end. The rotation of the engine is transmitted to the rotating disk at the distal end to rotate the engine. A mowing machine in which the string-shaped cutter is brought into contact with the vicinity of a weed root portion while being held by a shoulder band and a hand-held handle provided rearward from the support rod intermediate portion, wherein the string-shaped cutter surrounds a thin metal wire and an outer periphery thereof.
Layer, part of which is exposed from the tip of the thin metal wire.
Grass tangle prevention structure, characterized in that there. 2. The rotating disk is attached to a tip of the support rod.
A cutting blade protrudes from the outer periphery of the mounting holder to be mounted.
The weaving prevention structure according to claim 1. 3. The weed prevention structure according to claim 2, wherein the cutting blade projects in the radial direction of the holder.