JPH0451121B2 - - Google Patents

Description

Detailed Description of the Invention [Industrial Application Field] This invention provides a front blade by providing a large number of rectangular protrusions with a wedge-shaped cross section on the front edge of a weeding plate body, and an arc-shaped or corrugated groove in the recess between the protrusions. A weeding board, a weeding tool, and a weeding board that selectively cuts weeds that are softer than the lawn in a lawn by cutting target rhizomes in a shallow soil layer with a rear blade formed in a letter shape, or by cutting the target rhizomes in an upwardly curved manner. Regarding weeding equipment.

[Prior art] Conventionally, weeding tools (also called weed scrapers) as shown in Figure 7 have been mainly used in agricultural lands other than rice paddies, gardens, etc., but the method for using them is to drive them into the soil and flatten the roots of the roots. It is cutting with a blade.

Grass scrapers such as the two-pronged grass scraper shown in Figures 5 and 6 and the pitchfork shown in Figure 7 have been used for the purpose of hooking extended roots in the soil and tearing them out using force.

[Problems to be Solved by the Invention] However, with the above-mentioned conventional techniques, weeding becomes an extremely labor-intensive task. For example, with a flat-blade weeding tool used for weeding a relatively wide area, hard clods of soil, pebbles, etc. scattered on the ground receive an impact every time they hit the blade, with no way to escape except in the vertical direction, and they cannot escape upward. It takes a considerable amount of force to push the cutting edge further into the soil, and the driving force required for each stroke varies depending on the size of the clods on the ground, the size of the pebbles, etc. Weeding is extremely troublesome, especially when the land is dry. Therefore, farmers have to weed in a hurry after the rain, when the soil does not stick to the weeds and the soil clods are still damp. Even so, it is difficult work on gravelly land, and a flat blade, which is a mowing blade, is required. The damage is significant.

Further, the above-mentioned flat-blade grass rake cannot be used on a vast lawn such as a golf course because it cuts the roots or buds of the grass.

Therefore, manual work or a two-pronged weed scraper as shown in Figure 8 is used, but each time the weeds are pulled out one by one, the rhizomes are bitten between the sharp blades that fit diagonally on the inside of the prongs, so the roots of the weeds are pulled out. It is convenient, but it takes time to remove it.

The two-pronged grass raking shown in Figure 9 has an improved inner depth of the sharp-angled two-pronged grass raking mentioned above, and the inner depth maintains an arc-shaped margin, so it is easier to remove the ingrown rhizomes than the previous one. Although it is simple, it is extremely time-consuming and cannot be done continuously, as the roots must be dug deep into the soil one by one and then pulled out by lifting the roots.

Furthermore, the rake-shaped grass scraper shown in Figure 10 does not have an effective cutting blade for cutting rhizomes, and the protrusions are
The width becomes gradually narrower toward the front end, and the front end is formed into an arc shape and has no effective cutting edge. Therefore, even soft rhizomes must be driven into the soil around them to a predetermined depth, hooked onto protrusions, and pulled out by force, so they can be used for narrow flower beds, large agricultural areas for planting, etc. It cannot be used in gardens, etc., and it is impossible to cut weeds with rhizomes that are softer than grass that grow in lawns.

The above four examples are general weeding tools, and there are almost no proposals for other weeding tools, weeding tools, weeding tools, etc. that can reduce labor. Therefore, in order to reduce labor, harmful herbicides are often used in large quantities, causing various types of pollution, and it is said that the use of herbicides on agricultural land reduces crop yields. ing.

[Main Steps for Solving the Problems] The present invention includes a weeding board mainly made of steel or stainless steel plate, which has a front edge provided with a large number of rectangular protrusions having a wedge-shaped cross section to form a front blade. A rear blade is formed in the concave portion in an arc shape, a flat plate shape, a U-shape, etc. (see Figure 1B and Figure 2). The cross section of the above protrusion is wedge-shaped, and depending on the geology and the target object, a curved wedge shape is preferable for removing weeds such as clover that grow mixed in the lawn, and the front edge is also wide, which can be fatal to the lawn during mowing work. It is desirable to form a front blade that is blunt to the extent that it does not cause scratches or cuts, in order to cut weeds within the lawn while leaving the lawn intact. And in this case,
The protrusions of the protrusions are short enough so that when the weeding board is moved horizontally at the mowing height, the grass leaves and stems are not tightly concentrated between the protrusions, so that the grass that hits the protrusions is When the weed is repelled and falls down, the intertwining between the adjacent protrusions, that is, the grass in front of the rear blade, becomes untangled, making it easier for the rear blade to directly hit the leaves and stems of the weed. If the front blade is a triangular blade, it will roughly divide the grass in front and push it apart, so the divided grass will be pushed in front of the adjacent rear blade from both sides as it progresses, and the grass will converge. to guard weeds from the rear blade.

Also, if the rear blade is triangular, that is, the rear blade is pinched from the front edge, and if it joins at the innermost part or is pinched at the top of the triangle, the grass in front of it will be stronger as the weeding board advances. It will be subjected to cutting force. Even if the grass is hard and cannot be cut, it will be bitten and pulled from both sides at the deepest part and be torn to pieces, and young shoots will be easily cut off.

In general, thick grass is intertwined and concentrated, so the present invention is effective in these respects.

In addition, the length of the protrusion is 5 mm, the width is 6 mm, and the width of the rear blade is 6 mm.
A weeding plate with millimeter dimensions is installed on the weeding rotary body,
It was driven by a motor and was able to remove 90 to 98% of weeds in the lawn when the grass was about 100 mm long, but the speed of rotation varied depending on the season, the hardness of the grass, the type of grass, and the horse chestnut. It is important to set the humidity etc. according to the situation at the site, and the sharpness of the cutting blade also plays a role.
It is best to add various conditions and decide on an appropriate value.

A simple manual weeding tool can be obtained by attaching a handle to the weeding board as described above using a known method, but a push-pull type weeding tool can also be constructed by providing a long handle with a gravity wheel as described below. However, because traditional grass scrapers place too much emphasis on driving, the handle is perpendicular to the handle (for example, the nigiri handle of Scotop).
In contrast to the case where no nigiri handle or the like was required, the push-pull type weeding tool of the present invention is based on push-pull operation, so a nigiri handle as described below is specially provided to enable light work. Features.

The above-mentioned weeding board is not only for manual tools, but also for
Since a plurality of weeding tools and devices provided around the rotating body can be linked with other devices to configure various weeding tools and devices, the problems of the prior art can be greatly improved.

Example 1 See Figure 1, A, B, and C. This example is a preferred example of a push-pull type swinging weeding tool.
Nine protrusions are formed in the lower part of the semicircular weeding board 2 in parallel with the front edges aligned in a substantially straight line, and the front edges serve as front blades. [See Figure A], inside a compression spring whose lower end is integrally fixed to a spring receiver 10-1 rotatably provided in the center of an axle 8 that rotatably supports left and right gravity wheels 9 of a predetermined weight. A ball joint 30 has an upper end rotatably connected to the lower part of the support fitting 22, and a lower part is connected to the spring receiver 10.
-1 is rotatably installed in the center of the ball joint on the same plane as the upper end, but the compression spring is
It is made a little longer and its upper end is attached to a spring hanger 10-2. However, it is also preferable to appropriately select a compression spring and omit a ball joint or the like.

When this rocking weeding tool is pulled while supporting the handle 7 or the gripper handle 11, the compression spring is pulled by the motor vehicle and is slightly tilted and bent at the same time, but the ball joint is stretched linearly and pulls the moving body 31. Therefore, due to the principle of leverage, the front blade at the tip easily digs into the soil by the length of the protrusion, and as it is pulled closer to the ground, the rhizome is severed. If you push it back, the back side of the protrusion will rub against the ground, and the stem root caught between the protrusions will easily fall off.

Thus, by repeatedly lifting and pulling the nigiri handle 11 of the handle 7, and sometimes pushing it in the opposite direction, continuous weeding work is possible, and the labor of bending and stretching the waist is greatly reduced. The nigiri handle 11 is provided perpendicularly to the handle 7, and has a structure that makes it easy to apply push and pull force, and other nigiri handles other than this example, such as a scoop handle, are more preferable.

Embodiment 2 See Figure 2 A and B and Figure 3 A and B In this example, the weeding board 2 is provided with support pieces 6 on the sides,
This is an example of a weeding device driven by a prime mover attached to the outer periphery of a rotary body, in which two
A number of weeding boards are attached so that the distance between them and the axis can be adjusted, and the support trunk 32 of the vehicle body is rotatably supported on both sides of the weeding board.
A wheel 19 having an outer circumference larger than the outer circumference of the rotation range by a predetermined dimension is provided.

Furthermore, a grass collection bucket 1 is placed between the support stems 32 on both sides.
5 is rotatably provided in the direction of the arrow at a distance such that it does not come into contact with the weeding rotary body 18, and is supported by the regulating pipe 16 at a predetermined weeding angle.

An axle 19 is rotatably supported on both outer sides of an axle provided in the middle of the vehicle body, which is composed of a support shaft 32 on both sides of the front shaft, a regulating pipe 16, and a handle 11, and a prime mover 13 is supported in the center. It is provided with a belt 14 on one side.
The weeding rotor 18 is driven through the weeding rotor 18. Since this weeding device is for mowing above-ground grass, the diameter of the outer wheel of the weeding rotary body is larger than the outer circumference of the rotation range of the weeding rotary body as described above. After adjusting the mounting interval of the handle 1 as appropriate, the motor 13 drives the weeding rotary body 18,
By supporting and pushing 1, it is possible to selectively cut weeds in the farmland, or weeds with soft leaves and stems in the lawn by adjusting the rotation speed and the installation of a curved front blade of the weeding board. In addition, when determining the preferred speed of rotation, it is necessary to consider the hardness of the grass blades, the sharpness of the back blade, and other complex conditions when working in the weeded area.

Further, the weed collecting bucket 15 can be rotated and thrown away when the weeding plate attached to the weeding rotary body is in the vertical position shown in FIG. 3B. It is even more preferable to make it removable.

Although the weeding board 2 of this example has a front blade curved upward, it is preferable to further curve the protrusion and use it when the grass is soft or long. It is even more desirable to configure the weeding rotary body so that it can be reversed at any time, and to provide a function of removing grass pieces entangled with the protrusions.

In this example, the rotary drive is based on a prime mover, but when the support wheel and the weeding rotary body are interlocked to be manual, such as in a manual lawn mower, it is preferable to configure the weeding rotor to rotate in the opposite direction.

[Effect of the invention] Although this invention is constructed as before,
In the case of weeding boards, stones larger than those between the protrusions on the front blade are prevented from entering between the protrusions to protect the rear blade and maintain its sharpness for a long time, and because the front blade is wedge-shaped, it does not deform even if it hits a stone. is small and can be used in hard working conditions,
The wedge-shaped blunt blade is curved upwards and has a specified width, so it can be flipped forward without causing fatal damage or cuts to the lawn during mowing work, and the degree of protrusion of the protrusions is such that the weeding board can be raised to the mowing height. The blade is short enough to prevent the grass stems from converging tightly between the protrusions when the blade is moved horizontally, so the grass that hits the protrusions is repelled forward by the wide front blade and falls over. Sometimes, the tangle between adjacent protrusions, that is, the grass in front of the rear blade, becomes untangled, making it easier for the rear blade to directly hit the leaves and stems of weeds, allowing the blade to advance at an appropriate speed. If so,
You can selectively cut weeds that are softer than the lawn without mowing the lawn.

If the front blade is a triangular blade, the grass in front of the tip of the front blade is roughly divided into two parts and pushed apart, so in front of the adjacent rear blade, the grass divided into two parts is pushed in from both sides and the grass is Densely focused to guard weeds from the rear blade.

Also, if the rear blade is triangular, that is, the rear blade is pinched from the front edge, and if it is joined at the innermost part or pinched at the apex of the triangle, the grass from the front will move as it advances against the weeding board. It is compressed between both rear blades.

As a result, the grass in the areas that come into contact with the blades on both sides is subjected to a strong cutting force, but the adjacent grass passes through without being subjected to any cutting force at all.

On the other hand, grass that has been subjected to a strong cutting force may be damaged even if it is not cut, or it may be bitten by the rear blade from both sides at the deepest part, and if it is shallowly bitten, it will be torn up, or if it is deeply bitten, it will be torn into pieces.

In other words, as the cutting progresses, the grass in front of the rear blade receives strong cutting force, while the grass receives almost no cutting force, and it is clear that the same phenomenon occurs with weeds.

The present invention is shaped so that the same cutting force is applied to each lawn in front of the rear blade. Therefore, it is easy to determine the speed that will not cause damage to the lawn, and therefore, if you work at the limit of the speed that will not mow the lawn, weeds that are softer than the lawn will be cut.

In general, lawns have a harder and more flexible skin than weeds, and densely grown lawns are intertwined and bunched together, so the present invention is effective in this regard.

In addition, the swinging push/pull weeding tool, which has a handle on a gravity wheel, eliminates the need for driving work by bending and stretching the waist, and enables light work that involves only pushing and pulling.

A weeding device in which a weeding board is mounted on a rotary body and driven by a prime mover can mechanize weeding in lawns of golf courses, parks, etc., and can suppress or eliminate the use of herbicides.

In addition, if a weeding board with the length of the protrusion 5 mm, width 6 mm, and width of the rear blade 6 mm is installed on a rotating body and driven by a motor, and the grass is about 100 mm long,
We were able to weed the lawn and remove 90-98% of weeds, including clover, but the rotation speed should be set according to the site conditions, such as the hardness of the grass depending on the season, the type of grass, and the humidity of the land. This is important, and the sharpness of the cutting blade also plays a role, so it is best to add various conditions to determine the appropriate value.

Furthermore, for weeding in shallow soil layers, the durable front blade repels solid matter and protects the rear blade, which maintains its sharpness for a long period of time, allowing it to cut weeds' rhizomes as well as mound them. It also removes ivy soil, so it has a leveling effect.

[Brief explanation of the drawing]

The drawings are all reduced schematic diagrams, and Figures 1 to 3 are preferred examples of the present invention, and Figure 1 is an example of a push-pull type swinging weeding tool, with part (a) omitted. 2 is an example of a weeding plate for a weeding rotary body, A is a perspective view thereof, B is an enlarged perspective view of cross section C-C', Fig. 3 shows an example of a weeding device using a weeding rotary body driven by a prime mover, A is a side view thereof, B is a plan view thereof, and Fig. 4 is a plan view of a weeding plate of a conventional weeding tool. FIG. 5 is a schematic perspective view of a conventional two-pronged grass raker, FIG. 6 is a schematic perspective view of a conventional improved two-pronged grass raker, and FIG. 7 is a perspective schematic diagram of a conventional rake-type grass raker. 1... Weeding device, 2... Weeding board, 3... Protrusion,
4...Front blade, 5...Rear blade, 6...Support piece, 7...
Handle, 8...Axle, 8-1...Support, 9...Gravity wheel, 10...Regulation pin, 10-1...Spring holder, 1
0-2... Spring hanging, 11... Nigiri handle, 12...
Compression spring, 13... Prime mover, 14... Belt, 1
5...Grass collection bucket, 16...Regulation pipe, 17
... Hanging wheel, 18 ... Weeding rotary body, 19 ... Wheels,
20... Grass raking, 21... Two-pronged grass raking, 22... Improved two-pronged grass raking, 23... Rake-type grass raking, 30... Ball joint, 31... Moving body, 32... Support trunk.

Claims (1)

[Scope of Claims] 1. A weeding board in which a front blade is formed by providing a large number of rectangular protrusions with a wedge-shaped cross section on the front edge of the plate, and an arcuate or U-shaped rear blade is formed in the recess between the protrusions. 2. A weeding board is attached to the tip of the operating handle, with a front blade formed by providing a large number of rectangular protrusions with a wedge-shaped cross section on the front edge of the plate, and an arcuate or U-shaped rear blade formed in the recess between the protrusions. , a weeding tool connected to a moving body having a gravity wheel. 3 A plurality of weeding plates each having a front blade formed by providing a large number of rectangular protrusions with a wedge-shaped cross section on the front edge of the plate and an arc-shaped or U-shaped rear blade formed in the recess between the protrusions are attached to the outer periphery of the rotating body. The weeding rotary body is attached to a vehicle to form a weeding rotary body, the weeding rotary body is provided on a vehicle body equipped with a prime mover, and the weeding rotary body is rotationally driven by the prime mover, and the lowest level of the outer periphery of the weeding rotary body during rotation can be adjusted up or down by a predetermined dimension. A weeding device consisting of: 4 A plurality of weeding plates each having a front blade formed by providing a large number of rectangular protrusions with a wedge-shaped cross section on the front edge of the plate and an arcuate or U-shaped rear blade formed in the recess between the protrusions are attached to the outer periphery of the rotating body. to form a weeding rotor,
A weeding device in which the weeding rotary body is provided on a vehicle body equipped with a prime mover, and the weeding rotary body is rotationally driven by the prime mover, and a weeding plate provided on the weeding rotary body can be adjusted in distance by a predetermined distance from a rotation axis of the weeding rotary body. .