JPH1084740A - Lawn cutter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lawn cutter as the one where lawn is easily mowed and which is excellent in handling property such as cutter exchange, etc., and easy to use. SOLUTION: In the lown cutter having a rotary cutter 10 which is supported by a rotary shaft 22 so as to be rotated and driven, the rotary cutter 10 is provided with a rotor 12 supported by the rotary shaft 22 and needle-shaped cutter blades 14 which are fixed so as to be exchangeable and whose end part is projected from the outer peripheral side surface of the rotor 12. The needle- shaped cutter blades 14 are mounted so as to be exchangeable by metallic attachment fixtures 16.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lawn cutter which can be suitably used for lawn care.

[0002]

2. Description of the Related Art In lawn maintenance, the grass is cut short,
By allowing sufficient sunlight to reach the roots of the turf, the turf can be activated and the appearance of the turf can be improved. As described above, in lawn management, it is necessary to trim the turf at any time, but the actual trimming operation is a laborious operation, and it takes a considerable time to cut a lawn having a large area.

[0003] In addition to using hand-held garden scissors for cutting grass, various tools and devices for facilitating work are provided. For example, there are a lawn clipper driven by an electric drive, a hand-driven or an electric lawn mower, a mower using an electric or gasoline fuel, and the like.

[0004]

However, these instruments and devices have the following problems. In other words, electric clippers or electric lawn mowers can cut lawn much more efficiently than hand-held gardening shears or push-type lawn mowers, but lawn mowing can be much shorter. Since it is necessary to mow, it is not possible to reliably mow with something like a mower. Since the turf is thin and soft, it is necessary to use a cutter blade that is sharp to some extent. However, in this respect, there is a problem that a mower cannot reliably catch the turf and is not suitable for cutting short.

On the other hand, a lawn clipper is suitable for cutting grass in a short time, but is not always efficient in view of its structure, and is not suitable for cutting grass having a large area. In addition, when cutting grass, the cutter blade may come into contact with the ground stones or the like, which may damage the cutter blade. In such a case, the cutter blade needs to be replaced. Some mowers use a nylon cord to prevent the cutter blade from damaging the garden trees, or the cutter blade from being damaged by stones. However, such a cutter is not suitable for cutting soft turf.

According to the present invention, the cutting of the turf, which is performed as a care for the lawn, can be performed even if it is a soft turf. It is an object of the present invention to provide a lawn cutter that can easily deal with blade damage.

[0007]

The present invention has the following arrangement to achieve the above object. That is, in a lawn cutter having a rotary cutter supported on a rotary shaft and driven to rotate, the rotary cutter is exchangeably attached to a rotor supported on the rotary shaft by projecting an end from an outer peripheral side surface of the rotor. And a needle-like cutter blade. Further, the needle-shaped cutter blade is formed of a wire formed in a straight line, and is mounted with a predetermined length in the rotor surface so as to supplement wear or damage of the needle-shaped cutter blade. I do. Thus, the length of the protrusion of the needle-shaped cutter blade from the outer peripheral side surface of the rotor can be appropriately adjusted, and the needle-shaped cutter blade can be easily refilled. Further, the needle-like cutter blade is formed in a U-shape in a planar shape, and is attached to the rotor by protruding an end of the needle from an outer peripheral side surface of the rotor. Further, the needle-shaped cutter blade formed of a steel wire has a feature of being excellent in sharpness and durability. Further, the rotary cutter is driven by electric power. This allows efficient lawn pruning.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below. FIG. 1 is a perspective view showing one embodiment of a lawn cutter according to the present invention. The lawn cutter according to the present embodiment is an electric hand-held cutter, and is configured to cut a lawn by the rotary cutter 10. The rotary cutter 10 has a needle-like cutter blade 14 formed of a metal wire attached to a rotatable rotor 12 with its tip protruding from the outer peripheral side surface of the rotor 12.

In this embodiment, needle-like cutter blades 16 are mounted at equal intervals at four locations in the circumferential direction of the rotor 12. Reference numeral 16 denotes a mounting bracket to which the needle-like cutter blade 14 is attached. Reference numeral 18 denotes a body of a lawn cutter, which accommodates an electric motor. The body 18 becomes a hand-held part of the lawn cutter during operation. 20
Is a head portion, 22 is a rotating shaft supporting the rotor 12, 24
Is an electric cord.

Needle-like cutter blade 14 attached to rotor 12
Must have a certain strength and sharpness, and can be formed of a metal wire or a plastic wire. In the present embodiment, a steel wire having a diameter of 0.8 mm is used as a wire of the needle-like cutter blade 14. The material and diameter of the wire are not particularly limited, but the needle-shaped cutter blade 14 made of 0.8 mm steel wire has excellent sharpness and sufficient durability, and can be effectively used for cutting grass. .

In this embodiment, a steel wire bent into a U-shape is used as a method for mounting the needle-like cutter blade 14 on the rotor 12, and the U-shaped needle-like cutter blade 14 is attached to the mounting bracket 16. The method of fixing to the rotor 12 was adopted. FIG. 2 is a plan view of the rotor 12 on which the needle-like cutter blade 14 is mounted, and FIG.
Is a front view of the rotor 12. FIG. In the figure, reference numeral 26 denotes a groove in which the needle-like cutter blade 14 is mounted. In order to mount four needle-like cutter blades 14 on the rotor 12, four sets of two grooves 26 are provided in parallel with the diameter direction of the rotor 12. The depth of the groove 26 is approximately の of the thickness of the rotor 12. Rotor 1 of embodiment
2 has a thickness of about 8 mm and the depth of the groove 26 is about 4 mm. Reference numeral 28 denotes an escape groove for mounting the mounting bracket 16.

4 and 5, the rotor 12 has a needle-like cutter blade 14 attached thereto.
2A and 2B show a plan view and a front view in a state in which is mounted. The needle-shaped cutter blade 14 formed in a U-shape has a groove 2 with the tip of the needle facing outward.
6, the needle-like cutter blade 14 is pressed from above with the mounting bracket 16, and the mounting bracket 16 is screwed and fixed to the rotor 12 with the screw 30. The mounting bracket 16 is provided with the escape groove 28 and the rotor 1.
2 is a U-shaped part that can be bridged between the outer peripheral side and the outer peripheral side. Attachment bracket 16 in escape groove 28
Presses the base of the needle-shaped cutter blade 14 bent in a U-shape so that the tip of the needle of the needle-shaped cutter blade 14 protrudes from the outer peripheral surface of the rotor 12.
The base of the needle-like cutter blade 14 protruding from 6 is pressed from above to support the needle-like cutter blade 14.

Thus, the needle-like cutter blade 14 is
Is mounted and supported so as to protrude from the outer peripheral side surface by a predetermined length. The protruding length of the needle-like cutter blade 14 that protrudes from the outer peripheral side surface of the rotor 12 can be appropriately set, but the needle-like cutter blade 14 using the 0.8 mm diameter steel wire used in the embodiment has the rotor length. 12 protruded 8 mm from the outer peripheral side surface. When cutting turf short, a cutter having a length of about 8 mm is sufficient because the sharpness of the cutter is most important. Conversely, if the length of the needle protruding from the rotor 12 is too long, the cutter is likely to bend and the sharpness becomes dull when cutting turf. Therefore, it is preferable to determine the length of the needle in consideration of these problems. .

The needle-shaped cutter blade 14 formed in a U-shape as in this embodiment is attached to the rotor 1 by the mounting bracket 16 as described above.
The mounting length of the needle-shaped cutter blade 14 is extremely simple because the protruding length of the cutter blade is naturally determined by mounting the needle-shaped cutter blade 2. Further, in the case of manufacturing the U-shaped needle-like cutter blade 14 as described above using a metal wire such as a steel wire, it is necessary to simply bend the metal wire, and particularly to manufacture by polishing the blade portion. There is an advantage that it can be provided at a very low cost.

The U-shaped needle-like cutter blade 14 is
There are various methods for attaching to the above, other than the above embodiment. 6 and 7 show another method of mounting the needle-like cutter blade 14. 6 and 7 show the rotor 12 from the outer peripheral side surface.
In FIG. 6, a groove 32 for inserting and mounting the needle-like cutter blade 14 is provided toward the center of the rotor 12, and in FIG. FIG. 7 shows an example in which the mounting bracket 34 is mounted on the upper surface of the rotor 12 and the screw 30 is fixed in the thickness direction of the rotor 12 in FIG.

As described above, various methods of mounting the needle-like cutter blade 14 are possible, and the mounting method is not particularly limited. In the above embodiment, the rotor 12
Although four needle-like cutter blades 14 are attached in the circumferential direction, it is of course possible to mount four or more needle-like cutter blades 14. The diameter of the rotor 12 is not particularly limited, and the rotor 12 having an appropriate size can be used.

In the above embodiment, the needle-shaped cutter blade 14 is formed by bending a metal wire into a U-shape, but the needle-shaped cutter blade 14 is not limited to the U-shape. For example, it is also possible to use a simple straight line. In this case, the needle-like cutter blade 14 can be mounted by a screw or the like using a mounting bracket.

FIG. 8 shows an embodiment of the rotary cutter 10 when a straight needle-like cutter blade 14 is used. FIG. 8A is a plan view showing a state where the needle-like cutter blade 14 is mounted on the rotor 12, and FIG. 8B is a cross-sectional view of a part where the needle-like cutter blade 14 is mounted. The rotary cutter 10 according to this embodiment also includes a rotor 12.
The needle-shaped cutter blades 14 are provided at four locations at equal intervals in the circumferential direction of the blade. 36 is a storage groove provided to be wider than the needle-shaped cutter blade 14 for operating the needle-shaped cutter blade 14, and 36a is a guide groove for guiding and supporting the needle-shaped cutter blade 14 in the storage groove 36. . The guide groove 36a is provided at a width where the needle-like cutter blade 14 just fits.

The accommodating groove 36 is a straight needle-like cutter blade 14.
Are arranged linearly outward of the rotor 12. An insertion groove 38 is provided near the outer peripheral edge of the rotor 12 in the storage groove 36 and communicates with the guide groove 36 to insert the needle-like cutter blade 14. The needle-shaped cutter blade 14 is inserted from the outer peripheral side surface of the rotor 12 into the insertion groove 38 and inserted into the guide groove 36a to be mounted. Reference numeral 40 denotes a fixing screw provided in a screw hole leading to the insertion groove 38. An end of the fixing screw 40 abuts on the needle-like cutter blade 14 inserted into the insertion groove 38, and is fixed by screwing.

The rotary cutter 10 of the present embodiment has the guide groove 3
A metal wire having a length attached to 6a is used as the needle-like cutter blade 14, and the needle-like cutter blade 14 is inserted into each of the guide grooves 36a from the outer peripheral side surface of the rotor 12 and attached.
The protruding length of the needle-like cutter blade 14 is adjusted and fixed to the rotor 12 with fixing screws 40. When the needle-like cutter blade 14 is worn or damaged, the needle-like cutter blade 14 can be pulled out by a necessary amount and fixed with a fixing screw 40 for use.

The lawn cutter of this embodiment is a needle-like cutter blade 1.
The configuration 4 is simpler in structure than the U-shaped needle-shaped cutter blade 14 used in the above-described embodiment, and the needle-shaped cutter blade 14 can be provided at a lower cost. Another advantage is that the length of protrusion of the needle-like cutter blade 14 can be appropriately adjusted according to the cutting of the lawn.

The lawn cutter according to the present invention is a rotary cutter 10.
Using the needle-like cutter blade 14 as the
It is characterized by facilitating handling such as adjustment. This has the following remarkable effects not found in the conventional lawn cutter. That is, by using a needle-shaped cutter blade having a predetermined thickness, the cutter blade can be used as an excellent cutter without using a particularly polished blade. This sharpness is very effective when cutting soft lawns, especially when cutting short grasses. Since the lawn cutter according to the present invention is a rotary cutter having the needle-like cutter blade 14, even if the length of the needle-like cutter blade 14 is short, the lawn in the range where the rotary cutter 10 is swept can be neatly trimmed. Efficient pruning becomes possible.

The cutting by the rotary cutter causes a problem of the sharpness of the cutter, and the cutting efficiency can be improved as much as possible depending on the sweep range of the rotary cutter. In the above embodiment, a hand-held lawn cutter was described as an example.However, when managing a lawn of a large area such as a golf course, a needle-like cutter blade similar to the above-described embodiment was attached to a large rotor. What is necessary is just to attach a rotary cutter to a cart and to perform cutting. Even when the rotary cutter is mounted on the cart, more efficient cutting can be performed by mounting a plurality of rotary cutters.

When the needle-shaped cutter blade is used, there is an advantage that there is no waste since only the needle-shaped cutter blade needs to be replaced when the needle-shaped cutter blade is worn or damaged. As described above, the needle-shaped cutter blade can be used as a long wire such as a long steel wire, and even when processed as a needle-shaped cutter blade, the wire is only bent into a U-shape. It doesn't cost much and can be easily replaced. When using a needle-shaped cutter blade, it is extremely excellent in terms of sharpness, but it is easy to break or roll if the cutter hits a stone or hits a garden tree during cutting compared to a conventional cutter blade However, since the needle-shaped cutter blade does not require replacement cost and is easy to replace, there is no problem in terms of usability even if it is damaged.

The needle-like cutter blade is not limited to a metal wire as described above, but may be a plastic wire or the like. Further, in the above-described embodiment, the rotor 12 is rotated by the electric drive. However, the drive method is not particularly limited, and an electric rechargeable method, a gasoline engine drive method, or the like is also possible. . In addition, in order to facilitate disposal of the turf after mowing, an air suction device may be attached to the main body so that the turf cut by air suction is taken in at the same time as mowing.

[0026]

According to the lawn cutter according to the present invention, as described above, the rotor is provided with the needle-like cutter blade as the rotary cutter, so that it is possible to obtain excellent sharpness, and thereby the softness is improved. Lawn mowing can be performed extremely efficiently and easily, and can be effectively used for lawn management. Also,
Needle-shaped cutter blades can be provided at low cost as replacement blades and are easy to install and replace, so even if the needle-shaped cutter blade is worn or damaged, the needle-shaped cutter blade can be easily replaced and used It has significant effects such as being able to do.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of a lawn cutter according to the present invention.

FIG. 2 is a plan view of a rotor used in a lawn cutter.

FIG. 3 is a front view of a rotor.

FIG. 4 is a plan view showing a state in which a needle-like cutter blade is mounted on a rotor.

FIG. 5 is a front view showing a state where a needle-like cutter blade is mounted on a rotor.

FIG. 6 is an explanatory view showing a method of mounting a needle-like cutter blade.

FIG. 7 is an explanatory view showing a method of mounting a needle-like cutter blade.

FIG. 8 is an explanatory view showing a state in which a straight wire is mounted as a needle-like cutter blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Rotating cutter 12 Rotor 14 Needle-like cutter blade 16 Mounting bracket 18 Main body 20 Head part 22 Rotating shaft 26 Groove 28 Escape groove 30 Screw 32 Groove 34 Mounting bracket 36 Storage groove 36a Guide groove 38 Insertion groove 40 Fixing screw

Claims (5)

[Claims] 1. A lawn cutter having a rotary cutter supported on a rotary shaft and driven to rotate, wherein the rotary cutter is replaced with a rotor supported on the rotary shaft by projecting an end from an outer peripheral side surface of the rotor. A lawn cutter, comprising: a needle-like cutter blade movably mounted. 2. The needle-shaped cutter blade is formed of a linearly formed wire, and is mounted in the rotor surface with a predetermined length so as to supplement wear or damage of the needle-shaped cutter blade. The lawn cutter according to claim 1, wherein: 3. The needle-shaped cutter blade is formed in a U-shape in a planar shape, and is attached to the rotor with a needle end protruding from an outer peripheral side surface of the rotor. 1. The lawn cutter according to 1. 4. The lawn cutter according to claim 1, wherein the needle-like cutter blade is formed of a steel wire. 5. The lawn cutter according to claim 1, wherein the rotary cutter is driven by electric power.