JPH0529331U - Preventing grass entanglement of mowers - Google Patents

Abstract

(57) [Summary] [Object] The present invention has an object to provide a structure in which cut grass is not entangled with a mounting holder portion even when the above-mentioned nylon cutter or a similar string cutter is used. [Structure] In the present invention, since the holder rotates in synchronization with the nylon cutter, the cut grass is entangled,
This was done by paying attention to the fact that if a cutting blade is provided, the grass that tends to get entangled will be cut by its rotating action, and the entanglement can be eliminated, with the engine at the rear end of the long support rod and the flexible one at the tip. Attach a rotary disc with a string cutter protruding from the surroundings, transmit the rotation of the engine to the tip rotary disc and rotate it, and hold it with a shoulder strap and a hand-held handle provided behind the middle part of the support rod. In a mower in which the cord-shaped cutter is brought into contact with the vicinity of a weed root, a grass entanglement prevention mechanism formed by projecting a cutting blade, which is preferably directed in the radial direction, on the outer periphery of a mounting holder for mounting the rotating disk at the tip of the support rod. It is in.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a grass mower, and more particularly to a grass entanglement prevention structure for a mower in which a flexible cord cutter such as a nylon cutter is attached to the outer circumference of a rotary disk.

[0002]

[Prior Art]

 If you use a normal rotary blade to mow weeds and other grass that grows on a lot of stones, it is easy to chip the blade. Used. That is, as shown in FIG. 1, a mixed gasoline engine E is attached to the rear end of the long support rod 1, and a rotary disc 2 having a flexible cord-shaped cutter 3 protruding from the surroundings is attached to the front end of the engine. The rotation is transmitted to the tip rotation disk through the transmission mechanism in the support rod 1 for rotation, and the shoulder strap B provided on the rear side of the intermediate portion of the support rod 1 is hung on the shoulder to hold the U-shaped hand. A mower is generally used in which the handle H is held by grasping it with both hands and the cord cutter is brought into contact with the vicinity of the weed root.

[0003]

[Problems to be solved by the device]

 However, when the above-mentioned nylon cutter is used, the weeds are cut so that the weeds are cut into pieces, or the cut weeds are entangled with the attachment holder of the cutter and the operation is stopped. Therefore, it is proposed to attach a cover to the holder when using a metal blade, but leave a fixed gap between the cover fixed at the tip of the support rod and the cutter driven to rotate. It is necessary to remove the grass through the gap and wrap it around the holder. In that case, it is necessary to detach the main body and remove the wrapping grass each time, which makes the removal work more difficult. Therefore, an object of the present invention is to provide a structure in which cut grass does not get entangled with a mounting holder portion even when the above-mentioned nylon cutter or a similar string cutter is used.

[0004]

[Means for Solving the Problems]

 In the present invention, since the holder rotates in synchronization with the nylon cutter, the cut grass is entangled.However, when a cutting blade is provided on this holder, the rotating operation cuts the grass to be entangled and entangled. The engine was attached to the rear end of the long support rod, and a rotary disk with a flexible cord-shaped cutter protruding from the circumference was attached to the tip of the long support rod to rotate the engine at the tip. In a mowing machine that transmits to the disc to rotate it and holds it with a shoulder strap and a hand-held handle that are provided behind the middle part of the support rod to bring the cord cutter into contact with the vicinity of the weed root, It is a grass entanglement prevention mechanism which is formed by projecting a cutting blade, which is preferably oriented in the radial direction, on the outer circumference of a mounting holder mounted on the tip of the rod.

The holder may be provided with one cutting blade, but a plurality of cutting blades may be provided at regular intervals. It is convenient for cutting the entangled grass to project two pieces one by one on a diagonal line, or one piece every 120 degrees or 90 degrees. The cutting edge is preferably oriented in the radial direction or within or outside of 30 degrees thereof for cutting the entangled grass. The shape of the cutting edge may be either double-edged (see Fig. 3 (a)) or single-edged (see Fig. 3 (b)).

Further, as shown in FIG. 4, when the above-mentioned string-shaped cutter is composed of a fine metal wire 31 and a resin layer 32 surrounding the outer circumference thereof, and a part of which is exposed from the tip 31a of the fine metal wire, However, cutting of grass adds a cutting element to the shredding, and the rate of entanglement with the holder is reduced.

Hereinafter, the present invention will be described in detail based on specific examples shown in the accompanying drawings.

【Example】

 FIG. 2 is an exploded view of the grass entanglement prevention structure according to the present invention, in which a pair of cord-shaped cutters 3, 3 are attached to the rotary disk 2 at the positions of diagonal lines on the outer circumference thereof. As shown in FIG. 4, the cord-shaped cutter 3 is formed by providing a nylon resin coating 32 having a thickness of 1 mm on the outer circumference of a steel thin wire 31 having a diameter of 1 mm, and exposing the tip portion 31a of the steel thin wire 31 by about 5 cm.

Reference numeral 4 denotes a mounting holder which is screwed into the rotating portion 11 by a reverse screw when the rotating disk 2 is attached to the tip of the supporting rod 1, and includes a flange portion 41 and a sleeve portion 42 protruding from the central portion thereof. The cutting edges 5 of the two blades are welded and fixed to the outer periphery of the flange portion 41 at 120-degree intervals in the radial direction.

In the rotating disc 2, after the holder 4 is screwed into the rotating portion 11, the center protrusion 21 of the rotating disc 2 is fitted into the holder 4, and the mounting holder 6, the washer 7 and the nut are attached from below. 8 is fixed via a bolt (not shown) to complete the mounting.

When the mower having the above-mentioned configuration is used, the thin steel wire 31 is provided inside the nylon cutter and the tip thereof is exposed, so that the weeds are cut rather than cut. Therefore, the entanglement with the holder 4 is reduced. Therefore, even if grass is entangled with the outer periphery of the holder 4, since the cutting blade 5 that is oriented in the radial direction is formed on the outer periphery of the holder 4, the blade is divided and no entanglement occurs.

[0011]

[Effect of the device]

 As is clear from the above description, according to the present invention, a grass blade that is entwined with grass is provided with a cutting blade and the grass that is going to be entwined is divided by using the rotation operation of the holder. Entanglement can be prevented. In addition, since a metal wire such as steel wire is installed inside the string-shaped cutter, which was conventionally made only of nylon, and the tip of the wire is exposed to improve the cutting efficiency of the cutter, it will try to get entangled with the holder. You can reduce the amount of mowed grass. Therefore, it is possible to save fuel and to provide a practical mower with good work efficiency.

[Brief description of 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 grass entanglement prevention structure of the present invention.

[Fig. 3] Double-edged structure of the cutting blade attached to the holder
It is a top view which shows the attachment state of (a) and a single-edged structure (b).

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

[Explanation of symbols]

 1 Support rod 2 Rotating disk 3 Nylon cutter 31 Metal fine wire 4 Holder 5 Cutting blade

Claims (3)

[Scope of utility model registration request] 1. An engine is attached to the rear end of a long support rod, and a rotary disc having a flexible cord-shaped cutter protruding from the periphery is attached to the tip thereof, and the rotation of the engine is transmitted to the tip rotary disc for rotation. A mower for holding the cord-shaped cutter in the vicinity of the weed root part by holding it with a shoulder strap provided behind the middle part of the support rod and a hand-held handle, and an outer periphery of a mounting holder for mounting the rotary disc on the tip of the support rod. A grass entanglement prevention structure characterized by having a cutting blade protruding from the bottom. 2. The grass entanglement prevention structure according to claim 1, wherein the cutting blade is provided so as to project in the radial direction of the holder. 3. The grass entanglement prevention structure according to claim 1, wherein the cord-shaped cutter is composed of a thin metal wire and a resin layer surrounding the outer circumference thereof, and a part of the thin metal wire is exposed from the tip of the thin metal wire.