JP7421047B1 - Multifunctional weeding tool - Google Patents

Abstract

[Problem] Conventional weeding tools have a long repetition cycle of weeding operations, take time to remove weeds, and most of them have a single function of repeating the same weeding operation. [Solution] The blade plate 1 is located just in front of the grip part 14, and the point of force and the point of action are adjacent to each other, so that the force of the arm is efficiently transmitted to the blade, and the tip of the wrist or elbow is used. By swinging the weeding tool left and right to scrape the ground, the repetition cycle of the weeding operation was shortened, enabling high-speed weeding operations and shortening the work time. The blade is tilted diagonally to the direction of weeding, and the arcuate blade makes it easier to scrape the ground. Several types of weeding methods, in which weeding is performed by selectively using both sides of the blade, by turning the blade over and pushing the handle forward, have excellent weeding ability against individual weeds. With a combination of blades of multiple shapes and multiple weeding methods, it has a small, lightweight, and simple structure, yet has multiple functions, allowing you to instantly select and use the optimal blade and weeding method for each weed to be weeded. . [Selection diagram] Figure 1

Description

The present invention relates to a weeding tool mainly used for removing relatively small weeds in gardens, fields, parks, etc.

Conventional weeding tools include those that use the principle of leverage to pull out weeds by inserting a two-pronged pointed part into the root of the weed, and others that use the principle of leverage to pull out weeds while pressing the blade formed on the lower edge of the trapezoidal blade plate against the ground. There is one that removes weeds by pulling the handle toward you and scraping the ground.
Other methods include cutting roots by moving a serrated blade back and forth, cutting roots by stabbing the front half of a wide leaf-shaped blade plate into the ground, and cutting roots by sticking a flat blade plate long in the front and back direction into the ground. A blade with a straight edge is used to remove weeds by scraping the ground thinly in the left and right directions.The sickle handle and blade have a stepped shape, allowing the blade to penetrate beneath the ground and pull the handle towards you to cut roots. There are things to weed.

The weed remover of Patent Document 1 uses the principle of leverage to pull out weeds one by one by inserting the sharp, bifurcated tip into the root of the weed, placing the fulcrum on the ground, and pushing down on the rear part of the handle. be.

The weeding tool disclosed in Patent Document 2 removes weeds by applying the blade to the ground on the other side of the weeds to be weeded, pulling the handle toward you while pressing the blade against the ground, and scraping off the weeds along with the ground.

The underground weed root cutting tool of Patent Document 3 stabs a serrated blade into the ground and reciprocates it back and forth to cut the roots.

The weeding device of Patent Document 4 is described in the application documents to be operated back and forth to cut the grass roots.
The first half of the blade plate is inserted into the root of the weed to cut the root and kill the weed.

Regarding the blades on the side edges, the weeding tool of Patent Document 5 states in the specification that if the blade 4 is parallel to the soil surface and operated in a manner similar to shaving the grass, the weeding tool can easily remove the grass. It is described that it is possible to mow. It removes weeds by keeping the blade in close contact with the ground and scraping the ground thinly from side to side.
The front blade is used for weeding by stabbing the base of weeds, pushing down on the grip and holding part, and digging up the roots using the principle of leverage.

The weeding tool for root cutting in Patent Document 6 has a shape similar to a sickle, and has a step so that the blade is lower than the gripping rod.The blade penetrates under the ground, and while pressing the gripping rod downward, it is pushed forward. It removes weeds by pulling and scraping the roots from the ground.

There is no description of how to use the root cutter in Patent Document 7, but the blade at the front of the blade plate is used to cut roots by stabbing it into the base of weeds on relatively soft ground, and the straight blade on the right edge is used to cut roots on relatively soft ground. It can be assumed that the blade is used to scrape off weeds from the ground by shaking it, and the serrated blade on the left edge is used to cut the roots by pressing it against the right side of the weed and operating it back and forth.

Japanese Patent Application Publication No. 2002-84801 Japanese Patent Application Publication No. 2009-45046 Utility Model Publication No. 3-18701 Japanese Unexamined Patent Publication No. 63-237701 Utility Model Publication No. 59-16301 Japanese Patent Application Publication No. 2018-183127 Design registration number 857785

The weed remover of Patent Document 1 requires the operation of pricking the tip of each weed into the root of the weed and the operation of pushing down the rear part of the handle to pull out the weed, which makes weeding time-consuming and inefficient. , it is unsuitable for the purpose of removing a large number of weeds.

In the weeding tool of Patent Document 2, the blade and the handle are connected through the handle, which is the described name, and the length from the handle to the blade becomes long due to the handle of this intermediate support.
For this reason, when you press the handle downward and pull the handle toward you while pressing the blade against the ground, the length from the point of force to the point of application is long, so the force pressing the blade against the ground becomes weaker. There is.
Therefore, the blade is devised so that both hands are used to hold the upper side of the blade with the other hand, pressing the tip of the blade against the ground, and pulling the handle toward you.
However, the hand holding the top of the blade obstructs the view of the weeds being weeded, so after placing the blade on the ground to be weeded, it is necessary to repeat the operation of placing the other hand on the top of the blade each time. However, this operation is extremely troublesome and has the disadvantage that the repetition cycle of the weeding operation becomes long.
This weeding tool scrapes the ground with a fixed blade width, so when scraping off sparsely grown weeds one by one, it has the disadvantage of scraping more ground than necessary. Furthermore, the direction in which the blade is pressed and the direction in which it scrapes are not the same, making it difficult to maintain a constant depth of the blade scraping the ground, making it difficult to scrape the ground extremely thinly.
It is used to remove weeds by scraping the ground with a fixed width of the blade by pulling the handle toward you, so it has the disadvantage that it cannot be used for weeding in areas narrower than the horizontal width of the blade.

The underground weed root cutting tool of Patent Document 3 cuts roots by moving the blade of a saw blade back and forth underground, but the root cutting tool described in each drawing of this document cuts roots in a compacted area such as a schoolyard. It is impossible to penetrate the ground under the name of the sword, and its use is limited to relatively soft ground.
The weeding method of cutting roots by moving a saw blade back and forth is effective for cutting large weeds and weeds with strong roots, but the saw blade has the disadvantage that it is easily clogged with cut roots.
However, in the case of small weeds, it is faster and easier to remove the weeds by scraping them off with a regular blade weeder, rather than cutting the roots by moving a saw blade back and forth underground. The tool is used to remove large weeds on relatively soft ground.

The weeder of Patent Document 4 has a shape that has an almost vertical edge in the rear half of the side edge of the blade plate in the shape of a wide leaf, and the blade-like part on the side edge of the blade plate is not clearly shown in the drawing. .
Therefore, this weed cutter is used to cut the roots by inserting it into the base of the weed, and by swinging it to the left or right,
It has an arched edge on the front half of the side edge, and is not intended for scraping the ground to remove weeds. Weeding operations by root cutting and digging are inefficient and unsuitable for long hours of work to remove a large number of weeds.

The method of using the weeding tool of Patent Document 5 is as described in the above-mentioned "Background Art". As a result of making a prototype of a similar device and using it on a trial basis, we found that when weeding, the weeding tool was held at a high position from the ground due to its structure, which caused operational problems.
The prototype we made based on the size of the grip holding part was 220mm in total length, 100mm in height,
The length of the blade protruding toward the front is 85 mm.
When the blades on the side edges are used to scrape weeds from side to side, that is, when the back of the blade plate is in close contact with the ground, the height from the ground to the center of the thickness of the grip holder is 85 mm, and the grip holder is horizontal. This is not suitable for long hours of work as the weeding operation is forced to be done with the wrists bent upwards.
If the operation of pressing the lower surface of the blade plate closely against the ground and scraping it in the left and right directions is limited to small weeds with shallow roots, the load on the blade is light, so it can be scraped off along with the ground. however,
Since it is somewhat large in size and the height of the grip holding part is high, it is difficult to shake it from side to side to scrape off weeds, making it unsuitable for long hours of work to scrape off a large number of weeds.
Because the height of the grip holding part is high and the difference in height from the ground is large, when weeding weeds with small roots or large weeds, the moment the load is applied to the blade, the entire weeding device moves toward the weeding side. It tilts significantly and is difficult to scrape off. Weeding tools like this one, which scrape weeds by swinging a linear blade that is almost perpendicular to the weeding direction from side to side, tend to put stress on the blade when the difference in height from the lower surface of the blade plate to the lower surface of the front end of the grip holder becomes large. The disadvantage is that the weeding tool tends to tilt in the direction of weeding when the weeding is applied.
The one shown in FIG. 3 of this document is used for weeding by reciprocating the saw blade, so the weeding speed is slow and it is not suitable for removing a large number of weeds.
Therefore, the main purpose of the blade with a straight side edge is to keep the entire underside of the blade in close contact with the ground and swing the weeder to the left or right to scrape the ground very thinly and remove small weeds with shallow roots. It is intended for removal.
The blade at the front of the blade plate is for weeding somewhat large weeds, and is used to stab the base of the weed and use the principle of leverage to dig up the roots. In this operation, since the height of the grip holder is high,
It is difficult to stab the blade into the ground, and when used for digging, the steps are large and the blade is long, making it difficult to operate, and it is impossible to remove weeds in a short repetition cycle.

The weeding tool for root cutting in Patent Document 6 has a shape similar to a sickle, and the cutting blade and the gripping rod intersect at almost right angles, and a step is provided between the cutting blade and the gripping rod, so that the fingers gripping the gripping rod and the ground contact each other. interference is avoided.
The cutting blade penetrates under the ground, and while pressing the grip bar downward, pull it toward you to cut the roots and remove weeds.
When cutting weeds with a sickle, you cut off the stems above the ground, so there is no need to press the blade against the ground. However, to scrape off the roots below the ground, press the entire width of the blade downwards and move the grip bar toward you. I need to pull it. However, since the entire cutting blade protrudes to the side of the gripping rod, there is a drawback that the closer you get to the tip of the cutting blade, the farther away it is from the gripping rod, and the force that presses the blade downward becomes weaker. It is necessary to apply a counterclockwise rotation force to the blade and pull the gripping rod toward you while pressing it evenly to the tip of the cutting blade, which poses a problem in operability.
The repetition rate of the weeding operation is about once per second, and like the weeding tool of Patent Document 2, it cannot be used in a place narrower than the horizontal width of the cutting blade or in a narrow place with surrounding obstacles, and it cannot be used to remove a single weed. When weeding,
It has the disadvantage of scraping the ground wider than necessary.

Assuming that the diameter of the handle is 30 mm, the length of the blade plate is approximately 260 mm, and the maximum width of the blade plate is approximately 147 mm. The height from the lower surface of the blade plate to the lower surface of the front end of the handle is approximately 117 mm, and the length of the handle is approximately 167 mm. The angle of inclination of the handle to the blade plate is 40
It has become a degree.
Since the length of the handle is approximately 167mm, this root cutter can be operated with one hand, but since the blade plate is quite heavy with the large size mentioned above, it is necessary to swing it to the right to remove the right edge. The operation of scraping the ground with weeds with the blade places a heavy load on the arm, making it impossible to quickly remove weeds, and the arm becomes fatigued, making it unsuitable for long hours of work.
The length of the straight blade on the right edge is approximately 227 mm, and it can scrape over a wide area, but the force of the blade scraping the ground is distributed over the entire length of the blade, so it is weak compared to a blade with a short blade length, and it can scrape the ground. It is difficult to weed thick weeds, and the weeds that can be removed are limited to relatively small ones. In the front view, the straight blade is inclined at about 14 degrees with respect to the handle, but when gripping the handle and cutting to the right, the effect of tilting the blade at this level of inclination is small.
Due to the large size of the blade plate, swinging it to the right to scrape off weeds is impossible in places with surrounding obstacles or in narrow spaces.
The height from the lower surface of the blade plate to the lower surface of the front end of the handle is approximately 117 mm, so when cutting weeds in the right direction with a straight blade, the handle rotates when a load is applied and the entire device tilts in the weeding direction. There are some easy drawbacks.
When the angle of inclination of the handle to the blade plate is steep (40 degrees), it is necessary to swing the tool to the right to scrape the ground.
The operation of scraping weeds by moving the blade on the left edge back and forth is difficult to operate and difficult to use.
As an instrument that can be operated with one hand, it is too large and has a corresponding weight, so there are problems with operability and it is not suitable for long-term work. If you reduce the length of the blade plate to less than 1/4, it will be easier to operate with one hand, but the diameter of the handle will be less than 8mm, so the handle will be too thin.
It becomes difficult to grasp firmly.

Among the weeding tools disclosed in the above-mentioned patent documents, the linear blades of Patent Documents 2, 5, 6, and 7 are used for weeding by scraping the ground, and all weeds are weeded in a direction substantially perpendicular to the blade. Patent Documents 2 and 6 use a method of weeding by pulling the handle toward you, so they are not suitable for weeding by pulling the handle diagonally backward.
The linear blades of Patent Documents 5 and 7 can be used for cutting by tilting the blade diagonally with respect to the weeding direction when viewed from above in use, but the grip is located at a high position, making it difficult to operate. It is unsuitable for repeating weeding operations in short cycles.
When weeding in a plan view, as shown in Figure 7, if the blade can be tilted at a certain angle or more with respect to the weeding direction 55 to scrape the ground, the weeding width will be narrower, but it will be easier to scrape the ground when weeding on somewhat hard ground or with roots. Although it has the advantage of making it easier to scrape off weeds that have spread, it seems that no conventional weeding tools are intended to have this effect.

The problems with the weeding tools of the above patent documents have been described above, but furthermore, the weeding tools of Patent Documents 1 to 4 and Patent Documents 6 and 7 are all weeding methods that use the entire arm to operate, so they can be quickly removed. It has the disadvantage that weeding operations cannot be performed and the repetition cycle of weeding operations is long. The weeding tools disclosed in Patent Documents 5 and 7 have high gripping portions, have problems in operability, and are unsuitable for weeding operations that are repeated at short intervals.

There are various known weeding tools that remove weeds by scraping the ground, but all of them remove weeds by scraping the ground uniformly and thinly in an approximately constant width, and instantly remove weeds from the ground surrounding weeds. There seems to be no weed control method that can be used in conjunction with a weed control method that removes weeds by scraping small concave surfaces.
If you look at it from the perspective of a weeding worker, when scraping off small scattered weeds,
You only need to scrape the ground around the weeds with a narrow scraping width, and there is no need to scrape widely. It would be easier to use if there were a weeding tool that could do two types of scraping: one that scrapes the ground thinly over a wide area to kill multiple weeds at the same time, and the other that instantly scrapes a small area around the weeds. It's convenient.
If the blade plate and the grip are adjacent to each other, the height of the grip is low, and the weed remover can remove weeds from left and right, and if these two types of weeding tools can be used, the weeding operation can be repeated in a short period of time, making it easier to use. good. It would be even easier to use if these two types of scraping could be done in the same weeding direction.

In addition to the shape of the blade and the method of operation, the size and shape of the handle are also important factors in determining the operability of weeding tools. The handle is the contact point that transmits the force of your arm to the blade and weeding claw, and it fits comfortably in your hand and can be gripped firmly without discomfort, causing less arm fatigue, less slipping, and less loss of transmitted force, allowing you to weed for a long time. It is desirable to be able to work.
Many commercially available weeding tools that can be operated with one hand have a handle with a circumference of 80 mm to 90 mm, and some are equipped with a flat handle with a circumference of 60 mm.
A handle with a short circumference of the gripping portion has a small contact area with the palm or fingers of the gripping portion, making it difficult to obtain sufficient gripping force and making it unsuitable for long-term work. It is desirable to have a handle that is as thick as possible.
When we tried making two prototypes of the same blade, one with a thick handle and one with a thin handle, and compared them, the difference in ease of use was obvious. The usability is completely different depending on the quality of the handle, and the size and shape of the handle greatly influences the ease of use in practical terms.
(Explanation of the main points of the weeding tool of the present invention)

To summarize the weeding tool of the present invention in general, it has an extremely high weeding speed that is not found in other weeding tools, is small and lightweight, and has a simple structure, yet is capable of a wide variety of weeding methods.
The common shape of the weeding tool of the present invention is that the blade body is composed of a blade plate, a rising part, and a mounting part.
It is attached to the front part of the rod-shaped handle, and the mutual positional relationship between the blade plate and the handle is as described in (Explanation of Terms) below. The blade protrudes forward, and the rear end of the blade plate is positioned below the lower surface of the front end of the handle.
The weeding tool of the present invention has the synergistic effect of this common shape, the shape of the handle, and the blades of various shapes, making it easy to use and capable of high-speed weeding, which is not possible with conventional weeding tools.
In addition to flat blade shapes, there are also curved blade plates, the weeding tool shown in Figure 25 with the side edges of the straight blade bent slightly diagonally downward as shown in Figures 26 and 27, There are those with a twisted blade plate, and those with a blade plate shaped like a spoon upside down. The shape of the edge of the blade plate can be straight, arcuate, obtuse, or pointed at the front.
The blade plates having these shapes are modifications of the blade plate based on the weeding tool of Example 1 and the blade plate shape of FIG. 1, which are typical shapes of the present invention.
A unique feature that other weeding tools do not have is that the handle has a thinner front and rear part, making it possible to remove weeds by turning the blade over and making it extremely easy to use.
By installing blades of different shapes on the left edge, right edge, front edge, or the same side edge of the blade plate, you can frequently select and use multiple blade shapes during weeding, making it easier to use. The goal is to eliminate weeds in a shorter time, and its main functional features are as described in (a) to (n) below.
(stomach)

Small and lightweight, weeding speed is fast and work time can be shortened.
There is a blade just in front of the handle, so you can grip the handle at a low position close to the ground as shown in Figure 5, and since the grip is adjacent to the blade plate, you can efficiently transmit the force of your arm to the blade plate. The shape is suitable for swinging the weeding tool to the left or right and scraping the ground with the blades on the side edges, and this weeding method allows weeding operations to be repeated in short cycles.
This method of weeding, in which the weeding tool is swung from side to side to scrape the ground, has the advantage of being able to repeat the weeding operation at high speed, compared to the method of scraping the ground by pulling the handle toward you. Weeding operations by shaking the tip from the elbow to the left and right can be repeated about 2 to 3 times per second, and weeding operations by shaking the tip from the wrist to the left and right can be repeated about 3 to 4 times per second. A weeding tool capable of repeating weeding operations at such high speeds has not been found in conventional weeding tools. If the method shown in FIG. 9 is used, the point of effort and the point of action will be closer together, making weeding easier.
The weeding tool disclosed in Patent Document 5 uses a blade on the side edge to scrape off weeds, but because the grip is located at a high position, when a load is applied to the blade, the entire weeding tool tilts toward the weeding side. ,
Weeds targeted for weeding are limited to small, shallow-rooted weeds that can be weeded with the blade in close contact with the ground. Since the grip is located at a high position, it is difficult to operate, making it unsuitable for repeatedly scraping the ground at high speed.
(B)

By scraping the ground in a direction that is not perpendicular to the blade in a plan view when weeding, it is possible to remove ground that is difficult to scrape,
It can also be used to deal with weeds that have established roots.
While conventional weed killers that scrape off weeds scrape in a direction that is almost perpendicular to the blade, the weed killer of the present invention mainly scrapes in a direction that is not orthogonal to the blade, and can also scrape in a direction perpendicular to the blade. be.
In Patent Document 5 and Patent Document 7, although the linear blade on the side edge is not perpendicular to the weeding direction, the angle of the blade with respect to the weeding direction is close to 90 degrees, and the effect of slanting the blade is small.
This operation is similar to the operation of scraping the ground with a blade whose direction as seen from the top when weeding is inclined with respect to the weeding direction 55 shown in Fig. 7, or the operation of stroking the ground with an arcuate blade while rotating as shown in Fig. 12. You can feel the difference in how easy it is to scrape the ground compared to forcefully scraping in a direction perpendicular to the blade. Similarly, it is easier to cut by sliding the blade of a knife compared to cutting in a direction perpendicular to the blade.
In the case of the blade tilted in the weeding direction shown in Figure 7, as the degree of inclination increases, the blade protrudes more to the side of the handle, resulting in a poor balance between the left and right sides of the blade plate, but this defect can be corrected by shifting the blade plate. can.
What is particularly noteworthy about this weeding method in which the weeding method involves scraping with a blade that is inclined with respect to the weeding direction is the method of scraping the ground in the Y direction or toward the Y direction in FIG. 10 . Although the width of weeding is narrow, it can scrape the ground easily, it is really easy to use, and you can feel the difference in sharpness. The details are as described in the explanation of how to use the herbicide in Example 1.
Special point 2 is that in the weeding position shown in Figure 18, the blade plate is at an angle of about 60 degrees to the ground, and the handle is pushed in direction b, which is slightly diagonally forward of the blade tip direction, to create a convex arcuate blade. This is a weed control method that removes weeds. This method is effective even on relatively hard ground, and the cutting width is narrow, but
It is an excellent weeding method that allows for easy scraping.
In addition, a method of scraping by moving the bow-shaped blade in an arc is also easier to scrape; swinging from side to side is suitable for high-speed weeding of small weeds, and rotating scraping is suitable for scraping weeds with roots.
(c)

By adopting a handle with a thinner front part, it is possible to avoid interference between the front part of the handle and the ground, and even if the length of the blade is relatively short, the handle can be moved forward and downward with the blade turned upside down. Several types of easy-to-use weeding methods are possible, such as pushing the blade against the weeds, and many types of weeding methods can be used by properly using both sides of the blade plate.
In FIG. 3, which is a front view of Embodiment 1 of the weeding implement of the present invention, the blade plate is inclined with respect to the center line of the handle. In a similar weeding position, it is easy to press the handle to scrape the ground, cut down the ground, dig up the ground, and weed hard ground or ground mixed with pebbles. It has an ease of use that other weeding tools do not have.
Each weeding method involves flipping the blade over and pushing the handle to scrape off weeds.The blade and handle are at the optimal angle to the ground, making it extremely easy to use. This is the most characteristic part of the weeding tool of the present invention, which greatly improves operability and further increases the options for weeding methods.
It is difficult to express in writing the ease of use of this weeding method, but the ability to weed lightly, smoothly, and in a childish manner with the appropriate angle of the handle to the ground that is easy to work with is a great benefit for the worker's mental health. It can reduce arm fatigue during long hours of work. The details of the usage are as described in the usage of the herbicide in each example.
(d)

By providing a convex-shaped blade on the side edge, a wide variety of weeding methods can be used.
It has a shape common to all of the present invention, and has a handle with a thinner front part as shown in FIG.
Or, when viewed from the back, a weeding tool whose side edge of the blade plate is inclined with respect to the center line of the handle has a convex-shaped blade on the side edge of the blade plate that can be used for weeding with the blade plate turned upside down. It is a convenient and easy-to-use blade that can be used for multiple purposes such as stroking, pushing, concave scraping, turning scraping, and weeding methods that break up the ground.Details are described in the explanation of how to use the weeding tool in Example 1. It is as follows.
The weeder of Patent Document 4 does not clearly have a blade on the convex arc-shaped edge of the front half of the blade plate, but even if a blade is formed, the blade that can be formed is about half the length of the edge, and the blade can be formed on the left and right sides. In the operation of scraping the ground or scooping the ground, the lower part of the standing edge of the rear part interferes with the ground and becomes an obstacle to weeding.
(E)

By forming blades of different shapes on the left edge, right edge, and front edge of the blade plate, it is possible to have the functions of a plurality of weeding tools.
In the weeding tool disclosed in Patent Document 2, which scrapes weeds by pulling the handle forward, there is only one edge forming a blade, but in the weeding tool of the present invention, in addition to the left and right edges, there are also different front edges. It can form a shaped blade and can be used even with the blade plate turned upside down, making it suitable for a wider variety of weeding methods.
The straight blade formed on the side edge is for flat surface scraping, and is suitable for scraping multiple weeds in one weeding operation, while the convex arcuate blade is suitable for scraping a single weed, and can be used for many different weeding methods. It is possible.
The leading edge blade is suitable for cutting.
By providing blades of a plurality of shapes in this way, it is possible to have the functions of a plurality of weeding tools, and there is an advantage that blades of different shapes can be used properly.
A blade plate with a symmetrical blade shape that has the same blade shape on the left and right edges can scrape the ground in both left and right directions under the same conditions, and has the advantage that it can be used equally well whether you are left or right handed. be.
When the blade on one side becomes worn, the blade on the other side can be used as a spare blade.
(F)

The direction in which the blade is pressed against the ground and the direction in which the ground is scraped are the same.
The weeding operation of the weeding tools in Patent Document 2 and Patent Document 6 is to remove weeds by scraping the ground.
The direction in which the blade is pressed and the direction in which it scrapes are different, and it is necessary to press the blade against the ground and pull the handle toward you at the same time.
With the weeding tool of the present invention, the direction in which the blade is pressed and the direction in which the ground is scraped are the same in both the operation of scraping the ground in the left and right directions, and the operation of pushing the handle forward and using both sides of the blade plate to scrape the ground with the blade on the leading edge. The feature is that the blades can be moved at the same time by pressing the blades, making it extremely easy to operate. In the weeding position shown in Figure 5, the handle can be gripped at a low position close to the ground, so the blade plate is less likely to wobble, and the weeding operation can be repeated in short cycles by swinging from side to side with the blade being held down well.
In the straight blades of Patent Document 5 and Patent Document 7, the direction in which the blade is pressed and the direction in which it scrapes the ground are the same, but the height of the gripping part is high, making it difficult to operate, and the handle may bend when a load is applied. There is a drawback that the weeding tool tends to tilt as it rotates, making it unsuitable for applications where weeding operations are repeated at high speed.
(to)

By forming blades on the front edge and the left and right edges, weeding can be done to the left, right, front, back, and diagonally.
The weeding tool of Patent Document 2, in which the handle is pulled forward to scrape the ground, can weed in only one direction, but the weeding tool with the above blade can be used in the left-right direction, forward direction, diagonally forward direction, and diagonally forward direction. You can weed backwards. For those equipped with a linear blade with a blade angle of less than 90 degrees, the weeding direction can be selected as shown in Figure 10, and in the operation of scraping in the Y direction, the scraping width is Y1 in Figure 11, so the scraping width is narrow. It has the advantage of being able to remove weeds easily, and can be used on surfaces that are difficult to scrape.
(blood)

With the type 1 bending blade and the type 2 bending blade shown in FIGS. 30 to 33, plane cutting and concave cutting become easier. The details are as described for the weeding tool in Example 7.
(li)

The one in Figure 37 with a twisted blade plate has multiple blades formed on the edge of the same twisted side on the left or right side, which can be selected by simply rotating the handle. The angle between the handle and the ground,
It has the advantage of being able to weed using multiple blades in the same weeding direction, which is easy to use and has a suitable angle between the blade plate and the ground. The details are as described in the description of the weeding tool in Example 8.
(nu)

The weeding tool shown in Figures 40 to 42, which has a blade plate in the shape of a spoon turned upside down, can be used to weed twice in one reciprocation by swinging the blade from side to side with the blade pressed against the ground. Can be used for any purpose.
The details are as described in the description of the weeding tool in Example 9.

A common problem with all conventional weeding tools that can be operated with one hand is that they have a slow weeding speed. In order to solve this problem, the weeding tool of the present invention improves operability and weeding speed by improving the structure of the weeding tool body, the shape of the blade, the shape of the handle, and the weeding method.
In contrast to single-function weeding tools that remove weeds by repeating a single weeding method, the small and lightweight weeding tool of the present invention, which can remove weeds while using multiple weeding methods, offers ease of use that conventional weeding tools do not have. We are prepared.
While many conventional weeding tools have a single function, the weeding tool of the present invention can have blades of different shapes on the left edge, right edge, and front edge of the blade plate. The most suitable blade and weeding method can be instantly selected and used for each blade, and although it has a simple structure, it has the feature of being able to use a wide variety of weeding methods to remove weeds at high speed. Those equipped with a handle with a thinner front part can weed with the blade turned upside down, even if the blade is relatively short, giving a wider range of weeding options.
By making weeding possible with the blade plate turned upside down, both sides of the blade plate can be used, making it possible to realize a weeding tool that is both easy to use and has high weeding ability.
In addition, a model with two types of blades formed on the same edge is more convenient to use than one with one type of blade formed on the left and right edges, and two types of blades can be used in the same weeding direction. It has the advantage of being able to use different blades.

In the weeding method, the method of pulling out weeds one by one is an extremely inefficient weeding method that takes time to remove weeds no matter how good a weeding tool is used.
On the other hand, weeding methods that scrape weeds from the ground can cut the roots and separate weeds from the ground at the same time, and are faster at weeding than weeding methods that remove weeds, removing a large number of weeds. Suitable for use.
The weeding tool of the present invention enables efficient weeding work by scraping weeds in the left-right direction, forward direction, diagonally forward direction, diagonally backward direction, and backward direction.

The weeding tool of the present invention is basically operated with one hand, and a small rake held in the other hand is used to remove weeds while weeding in parallel, thereby eliminating weeding. It is easy to understand and weeding work can be done efficiently.

In order to solve the problems of conventional weeding tools, the weeding tool of the present invention is a small and lightweight weeding tool that has a low weeding posture and is swung from side to side. The blade has a shape suitable for scraping the ground, and the weeding operation can be repeated in short cycles, reducing the time required for weeding.
In order to enable high-speed weeding, it is essential that the height of the rising part of the blade is low, which is the basic shape of the present invention, and that the blade plate is located just in front of the handle. be.
The operation of scraping the ground from side to side with a weeding tool with a short handle has the advantage that it can be repeated in a shorter period of time and can remove weeds at higher speeds, compared to a weeding tool that scrapes the ground by pulling the handle toward you. By forming blades on the left and right edges of the blade plate, high-speed weeding is possible in either the left or right direction.
In the weeding tool of the present invention, the direction in which the blade is pressed and the weeding direction are the same in both the weeding operation in which the weeding tool is swung from side to side to scrape weeds and the weeding operation in which the handle is pushed forward to scrape off the weeds. Compared to weeding tools with different blades, weeds can be removed simply by reciprocating the blade, allowing for quick repeated operations.
The weeding tool, which is the common shape of the present invention, has a handle that can be held at a low position close to the ground as shown in Figure 5, so it is suitable for weeding operations in which weeds are scraped to the left or right with the blade on the side edge. A weeding tool that can repeat weeding operations at high speed by swinging the weeding tool from side to side using the wrist or elbow as a fulcrum is something that has not been seen in conventional weeding tools.
By placing the blade plate and the gripping part next to each other, and bringing the point of force and the point of action close together, it is possible to grip near the blade plate,
The shape allows the force of the arm to be efficiently transmitted to the blade plate when pressing the blade against the ground or swinging the weeding tool from side to side.
If you operate it by placing your index finger on the front upper surface or front right side of the handle as shown in Figures 8 and 9,
Furthermore, it is possible to promote the force of pressing the blade against the ground and the force of pushing the blade to the left. When weeding with the blade on the right edge, you can place your thumb on the front left side of the handle to help push the blade to the right.
This operation, in which the point of force is brought close to the blade and the force used to push the blade in the weeding direction with the index finger or thumb, is made possible by placing the blade plate and handle adjacent to each other, making it an extremely easy-to-use weeding tool. It is easier to weed by swinging the weed from side to side at high speed, and it is an excellent method of use that allows you to feel the difference in operability. From the X direction to the Y direction in FIG. 10, place your index finger as shown in FIG.
The operation of removing weeds in any direction is a method that is easier to use because it makes it easier to scrape the ground.
However, weeding tools with a large step in the rising part and those with a shape in which the distance between the blade plate and the front end of the handle are far apart are unsuitable for this operation because the point of force and the point of action are far apart.
In the weeding tool described in the above-mentioned patent document, which is operated using the entire arm, when weeding operations are performed continuously, the number of repetitions is approximately once per second, and it is difficult to perform two operations per second in succession. It is.
On the other hand, with the method of swinging the weed killer of the present invention to the left or right and scraping off weeds along with the ground using the blades on the side edges, there is no need to move the entire arm, and you can simply swing the weeding tool from the elbow or wrist to the left or right. Since it can remove weeds, it is possible to perform continuous weeding operations about 2 to 4 times per second, which has the advantage of shortening the time required for weeding. In the weeding method shown in Figure 15, in which weeds are scraped with the blade on the front edge of the blade plate by pushing the handle, small weeds are removed by placing the blade on the front edge against the base of the weed and pushing the handle 20 to 30 mm forward. Since one weed can be removed, weeding operations can be performed 2 to 3 times per second.

As a second means of solving the problem, by scraping with a blade that is oblique to the weeding direction 55 as shown in Figure 7, the ground can be scraped more easily than when scraping in a direction perpendicular to the blade. That's what I did. The straight blade 6 of the weeding tool shown in FIG. 2 is an example of an obliquely inclined blade.
A beveled blade at an obtuse angle with respect to the weeding direction has the same effect, but compared to an acute-angled blade, when the blade wears and becomes dull, it is more likely to slip and escape.
Similar to a peeler with a blade attached diagonally, by moving the pressed blade diagonally, you can scrape the ground more easily. When pruning a garden tree, when using scissors to cut a thick branch, it is difficult to cut in the direction perpendicular to the branch, but it is easier to cut if the blade is oriented diagonally. The slanted blade is effective against difficult-to-cut ground and weeds with stubborn roots.
When swinging the weeding tool from side to side using your wrist or elbow as a fulcrum, the trajectory of the blade will be arched, so
A similar weeding method has the same effect, in which when a blade with an arched side edge is swung to the left or right, the blade moves in an arched manner, scraping the ground with the blade that rotates as if stroking.
However, when using a blade that is inclined with respect to the weeding direction 55 in FIG. The balance will be poor, but this can be corrected by shifting the blade plate. In Figures 2 and 7,
The balance was corrected by shifting the blade plate to the right.
In FIG. 2, as the angle 20 of the blade becomes smaller, the width of the scraping in the left direction becomes narrower, but since the scraping method is like stroking the ground, it has the advantage of being easier to scrape.
As shown in FIG. 10, the linear blade 6 in FIG.
The weeding direction can be arbitrarily selected, and the weeding width is the maximum at Z1 in the Z direction and the minimum at Y1 in the Y direction in FIGS. 10 and 11. In the Y direction, the angle of the blade is 150 degrees with respect to the weeding direction, so the width of weeding is 50% compared to the Z direction, which is perpendicular to the weeding direction, but the weeding can be done easily with less force. There is a feeling of improved sharpness.
This operation of scraping the ground by pulling the handle in the Y direction or closer to the Y direction is a technique that is very easy to scrape and is one that you will want to use often.
The operation of scraping in the X direction can be performed by shaking the weeding tool left and right, so it has the advantage of being able to remove weeds at high speed with a shorter repetition cycle than in the Y direction. In FIGS. 10 and 11, the weeding width in the X direction is 86% of the width in the Z direction.
By selecting the weeding direction, the ground that is easy to remove is removed with the maximum width, and the ground that is difficult to remove is removed with the minimum width, making it possible to weed the ground that is difficult to remove and weeds with roots, making it easier to remove weeds.
Compared to a blade that is perpendicular to the weeding direction, a slanted blade has a narrower cutting width, but the angle of the blade plate relative to the ground is stable, less likely to wobble, and there is less variation in the depth of cutting the ground, allowing the blade to touch the ground more easily. It has the effect of inhibiting deep penetration.
In FIG. 3, when the height difference of the rising part 2 increases, the weeding tool tends to tilt in the weeding direction when a load is applied, but the linear blade tilted with respect to the weeding direction in FIG.
Compared to those where the angle is around 90 degrees, there is an advantage that the larger the angle difference from 90 degrees, the harder it is to tilt. A blade tilted in the opposite direction to the weeding direction has a similar effect.
In the weeding tool of the present invention, most of the weeding operations in which the ground is scraped with a linear blade are performed in a weeding method in which the blades are scraped at an angle with respect to the weeding direction.

The third means to solve the problem is to employ a convex-shaped blade in which the blade is formed on the arched edge of the blade plate. The blade 7 on the right edge of the weeding implement shown in FIG. 1 is an embodiment in which the blade 7 is in the shape of a convex bow, and this shaped blade has the advantage that both sides of the blade plate can be used for weeding, and can be used for a variety of purposes.
In the weeding tool shown in Figure 3, which has a handle whose blade plate is inclined with respect to the center line of the handle and whose front part is thinner, the convex-shaped blade formed on the side edge of the blade plate is pressed. It can be used for a variety of purposes such as stroking, concave scraping, turning scraping, weeding methods that break up the ground, crescent-shaped scraping, etc., and can be used in conjunction with many different weeding methods to remove weeds, making it extremely valuable. Details of the various weeding methods are as described in the explanation of how to use the weeding tool in Example 1.
The convex-shaped blade formed on the side edge is suitable for weeding in concave ground, which is difficult to remove with straight blades.
It is also effective in removing weeds that grow close to the sides of stones and walls.

As a fourth problem-solving means, Example 7, FIGS. 30 to 32, is a weeding tool equipped with a type 1 bending blade on the left edge and a type 2 bending blade on the right edge. The type 1 bent blade makes it easier to cut a flat surface, and the type 2 bent blade makes it easier to cut a concave shape. Details are as described in the description of each blade and the description of Example 7.

As a fifth problem-solving means, Example 8, FIG. 37, is a weeding tool equipped with a twisted blade. For the twisted blade, you can select one of the multiple blades formed on the edge of the side with the left or right twisted blade by simply rotating the handle. The angle with the ground is a moderate angle that is easy to use, and it has the advantage of being able to use multiple blades to weed in the same weeding direction, which is easy to use. The details are as described in the description of the weeding tool in Example 8.

As a sixth problem-solving means, Embodiment 9, FIGS. 40 to 42, is a weeding tool equipped with a blade plate in the shape of a spoon turned upside down. The feature of this weeding tool is that the blades on the left and right edges touch the horizontal surface at the same time at a moderate angle of inclination, so when you swing the weeding tool from side to side, you can scrape the ground once in both directions in one reciprocation. Therefore, efficient work is possible. This blade-shaped weeding tool can be used for other purposes as well.

The seventh solution to the problem was to improve the shape and thickness of the handle.
The first improvement is that the thickness of the front part of the handle is thinner than the thickness of the handle. Figure 3
32 is a thinner part by cutting off the upper surface of the front part of the handle.
Unlike a simple chamfer, this shape prevents the front part of the handle from interfering with the ground in the weeding position with the blade upside down as shown in Figure 15, even if the blade length is relatively short. A very easy-to-use method of weeding can be achieved by pressing the handle in this position and scraping the ground with the blade on the front edge.
The weeding tool shown in Fig. 1, which has a convex arc-shaped blade from the front edge to the side edge and a handle with this shape, and whose blade plate is inclined with respect to the center line of the handle, is a weeding tool similar to that shown in Fig. 15. In terms of posture, weeding methods that cut down the ground, stroking, crescent-shaped scraping, weeding methods that dig up weeds, weeding methods on hardened ground or ground mixed with pebbles are now possible, and both sides of the blade plate can be used. The weeding function has been expanded. Details of these weeding methods are as described in the explanation of how to use the weeding tool in Example 1.
The second improvement is that in the weeding method shown in Figure 15, in which the thickness of the rear part of the handle is made thinner, the blade plate is turned over, the rear part of the handle is gripped with the palm of the hand, and the handle is pressed to remove weeds, the rear part of the handle is in the palm of the hand. Because the handle fits tightly against the palm of the hand, the rear corner of the handle does not feel uncomfortable against the palm of the hand, and the shape is easy to grip and press.
Reference numeral 33 in Fig. 3 is the cut-off part at the rear of the handle, and this shape of the handle has the advantage that it is really easy to grip with the blade plate turned over, there is no slippage, and it is easy to push the handle to remove weeds.
The third improvement is that the front, upper and side surfaces of the handle are made flat. In Figures 8 and 9, pressing the blade plate and pushing the blade plate to the left or right is facilitated by placing your index finger on the top or side of the front of the handle, or placing your thumb on the left side of the front of the handle. When weeding, it is easier to place your fingertips on it compared to a cylindrical round handle, making it easier to assist in weeding operations.
The fourth improvement is simply making the handle thicker and making the cross-sectional shape oval.
The contact area between the fingers and palm of the hand is widened, making it difficult to slip and improving grip strength when pushing, pulling, rotating, and shaking the handle from side to side, making it suitable for long hours of work. ,
It's really easy to use.
In weeding operations by rotating the handle, a thicker handle can be rotated with less force, and a handle with an elliptical cross section has the advantage of being less slippery than a handle with a circular cross section. The thickness of the handle, that is, the circumference of the grip part is 9
It is desirable that the length be approximately 0 mm to 130 mm. This is because each person's hand size is different, so it is impossible to match the thickness of the handle to the person using it, but as long as it can be held without feeling uncomfortable,
It is desirable to have a handle that is as thick as possible.
(Explanation of terms)

Below, we will explain the basic posture of the weeding tool of the present invention, the positional relationship between the blade plate and the handle, up to the "effects of the invention".
The shape that provides the best operability and the terms used are explained in the following order of arrangement.
(1) Basic position of the weeding tool (2) Basic positional relationship between the blade plate and handle (3) Shape for best operability (4) Blade body, blade plate, rising part, attachment part (5) Center line of handle (6) Handle width center line (7) Flat blade (8) Flat blade plate, side edge is flat (9) Deviation, deviation ratio (10) Straight blade (11) Convex arch blade, convex arch shaped blade Blade, obtuse-angled blade (12) Concave arch-shaped blade, concave arch-shaped blade (13) Bent blade (14) Type 1 bent blade (15) Type 2 bent blade (16) Twisted blade (17) Spoon-shaped blade plate , blade plate shaped like a spoon facing down (18) Blade angle reference line (19) Blade angle (20) Blade angle of straight blade (21) Blade angle of convex arcuate blade (22) Concave arcuate Blade angle (23) Handle inclination angle (24) Handle thickness (25) Handle with thinner front and thinner back (26) Shift of blade plate (27) Weeding implement Front and rear, left and right,
(28) Blade tip, blade plate front edge (29) Side edge rear edge, blade plate rear edge (30) Left edge, right edge, side edge, front edge, front edge (31) Rotation of the handle, rotation of the handle Swirling (32) Plane shaving, stroking shaving (33) Concave shaving, concave shaving (34) Swirling shaving, gouging weeding method (35) Pressing shaving (36) Weeding method that cuts down the ground

The basic posture of the weeding tool is the basic posture of the weeding tool for explanation, and the following two items represent the state of the weeding tool in the basic posture.
- Basic positional relationship between blade plate and handle - Rear end of side edge Details are described in the explanation of rear end of side edge The basic position of each shape of weeding tool is as follows.
1 to 3 are perspective views of a weeding tool with a flat blade plate and a stepped portion of the rising part 2 of the blade body, which is a typical shape of the weeding tool of the present invention, and the blade plate of FIG. The basic posture is one in which the lower surface is in close contact with the horizontal surface.
Even if the blade plate is not flat, if the side edges are flat, the basic posture is a posture in which the lower surface of each side edge is in close contact with the horizontal surface.
In the case of a blade whose side edge is not flat but curved so as to protrude downward, in Fig. 45,
The angle 135 between the horizontal plane 45 and the center line 36 of the handle is 20 degrees, and the rear end 125 of the side edge is the horizontal plane 45.
The basic posture is the posture in which the projected area from the light source directly above the blade plate onto the horizontal plane of the blade plate is maximized.
If the bent shapes of the left and right edges are not the same, the basic posture is a posture in which the rear end of each side edge is in contact with the horizontal plane in the above posture.
In the case of a blade plate shape that has the above-mentioned curved blade and a flat blade with a length of 20 mm or more on the same side edge on the left or right side, the basic rule applies to the blade on the rear side of that side edge. This position is the basic position of the weeding tool. In other words, if the blade has a flat rear side edge, the lower surface will be in close contact with the horizontal surface,
In the case of a blade whose rear side edge is curved as shown in Figure 45, the angle between the horizontal plane and the center line of the handle is 20 degrees.
This is the posture in which the rear side edge of the curved portion touches the horizontal plane, and the projected area of the blade plate onto the horizontal plane from the light source directly above the blade plate is maximized.
The basic position of a weeding tool in the shape of a blade with a spoon facing down is with the blade facing down on a horizontal surface.

Next, the positional relationship between the blade plate and handle of the weeding tool of the present invention will be explained. This is the mutual positional relationship between the blade plate and the handle in the basic posture of the weeding tool of the present invention, and is common to the present invention as a whole.
In FIG. 3, which is a front view of the weeding tool of Example 1 in its basic position, the front end 24 of the blade plate protrudes in front of the front end 12 of the handle, and the rear end 27 of the side edge is lower than the lower surface 28 of the front end of the handle. positioned.
This positional relationship is the same in the rear view of the basic posture.
This is the positional relationship between the blade plate and the handle in the front view or rear view of the basic position, which is common to all the weeding tools of the present invention, and this positional relationship is called the basic positional relationship between the blade plate and the handle. This positional relationship is the same for weeding tools having shapes other than those shown in FIG.
A weeding tool with this shape has a blade just in front of the handle, and as shown in Figure 5, the height of the front part of the handle is low relative to the ground 50, so that the weeding tool can be gripped at a low position close to the ground. Suitable for weeding methods in which the blades are swung from side to side to scrape the ground with the blades formed on the side edges of the blade plate.
Although the figures of each embodiment show a shape in which the attachment portion of the blade is attached to the lower front surface of the handle, the shape is not limited to the shape in which the attachment portion of the blade is attached to the lower surface of the handle. In each embodiment, the rising portion and the mounting portion are plate-shaped, but they may also have a structure in which a rod-shaped material is joined to the blade plate by a method such as welding.

As shown in Figure 5, you can grasp the handle and swing the weeding tool from side to side to scrape off weeds, use the convex arcuate blade to scoop up the ground at the base of the weeds, or push the handle as shown in Figures 14 and 15 to remove the weeds from the front edge. For weeding tools that remove weeds by scraping the ground with a blade, the shape that provides the best operability is as follows.
When weeding by swinging the weeding implement from side to side, the blade formed on the side edge of the blade plate is tilted slightly to the ground to scrape the ground, so the blade plate is placed just in front of the handle and the blade rises up. It is desirable that the height of the part is low and that the shape allows the user to grasp the handle adjacent to the blade plate and swing it from side to side while holding the blade plate effectively. A shape in which the point of force and the point of action are adjacent is desirable, and a shape in which the distance between the grip portion and the blade plate is long is unsuitable.
A device with a high rising portion has the disadvantage that when a load is applied during the operation of scraping weeds in the left-right direction, the handle rotates and the weeding tool tends to tilt in the weeding direction.
When weeding, the distance between the bottom of the handle and the ground must be such that the fingers holding the handle do not interfere with the ground. Considering that the blade plate is operated with a slight inclination to the ground, the height from the blade plate to the lower surface of the handle must be 35 mm or more to avoid interference with the ground. It is not suitable for long hours of work as the weeding operation must be done with the wrists bent upward.
The attitude of the weeding tool during weeding is preferably such that the angle of the center line of the handle with respect to the ground is within the range of 15 degrees to 30 degrees. If the height of the rising part of the blade is about 15 mm and the shape allows weeding operations with the center line of the handle at an angle of 20 to 25 degrees to the ground, interference between the fingers holding the handle and the ground will be avoided. It can be operated with almost no bending of the wrist, which is advantageous when working for long periods of time.
In FIG. 3, if the height of the rising part 2 of the blade is approximately 15 mm, and a straight line 29 parallel to the center line of the handle passing through the lower surface of the grip of the handle intersects with the blade plate, operability will be improved. Even in the weeding posture shown in FIG. 15 with the blade plate turned over, the weeding operation can be performed at an easy-to-use angle between the ground and the blade plate, and an easy-to-use angle between the ground and the handle.
In FIG. 3, the blade plate is positioned so as to intersect with any straight line parallel to the center line of the handle, such as the straight line 29, which passes within 50 mm below the center line 36 of the handle. It is desirable that
The shape of the handle is preferably the shape shown in Figures 1 to 3. A handle with a thinner front part avoids interference between the front part of the handle and the ground, even if the length of the blade plate is relatively short. This allows for the weeding method of turning the blade plate in Figure 15 and several similar easy-to-use weeding methods, and the thinner handle at the rear makes these weeding methods even easier to use.

The blade body is a general term for the blade plate, the rising part, and the mounting part, and in FIG. 1, 1 is the blade plate, 2 is the rising part, 3 is the mounting part, and 4 is the blade body.
The blade plate is the edge forming the blade, the part of the plate with the same plane or curved surface as the edge, other than the rising part and the mounting part. For blade plates with a wide shape or area, holes can be made to reduce weight. The total length of the blade plate refers to the length from the tip of the blade plate to the rear part of the blade plate, which is the longest length.
The rising part is an intermediate support between the blade plate and the mounting part, and when viewed from the front in the basic posture,
Or, when viewed from the back, it is the height difference between the rear end of the side edge in contact with the horizontal plane and the lower surface of the front end of the handle. In FIG. 3, this is the portion from the rear end 27 of the side edge to the lower surface 28 of the front end of the handle.
For blade plates with a rising part located midway between the front end and the rear end of the blade plate, or with a rod-shaped rising part, a blade cannot be formed on the rising part, but the rear side edge can be bent upward in an arched shape. Since a blade can be formed in this bent portion, the blade formed in this bent portion is treated as a blade formed in the rising portion.
For blade plate shapes that have a curved blade and a flat blade with a length of 20 mm or more on the same side edge, the blade on the rear side of the edge should have a front view or a rear view in its basic position. The height difference between the horizontal plane where the rear end of the side edge touches and the lower surface of the front end of the handle is defined as the rising part.
Figure 3 shows a blade shape that is bent from the top of the rising part to the mounting part, but the inclination angle of the rising part is about 15 to 30 degrees with respect to the horizontal plane, so there is no bending part at the top of the rising part, and the blade shape is curved from the top of the rising part to the mounting part. It is also possible to simply form a blade shape in which only the lower part is bent into a dogleg shape or an arch shape.
In this shape, when viewed from the front or back in the basic position, the height is from the horizontal plane where the rear end of the side edge touches to the lower surface of the front end of the handle attached to the inclined part of the blade, which serves as both the rising part and the mounting part. Let the difference be the rising part.
The step in the rising part is a shape in which the upper and lower parts of the rising part are bent, as shown in Figure 3.
8. A weeding tool with a raised part in the middle of the front and rear ends of the blade plate as shown in Figure 29, or a weeding tool with only the lower part of the raised part bent, or a weeding tool with a rod-shaped raised part. This refers to the difference in height from the rear end of the side edge to the lower surface of the front end of the handle in the basic position of the tool.
The blade formed in the rising part belongs to the rising part. If the lower part of the rising part is made into a rounded bent shape and the blade is formed in this part as shown in Fig. 3, this arch-shaped curved blade,
You can use the blades at the rear of the side edges to remove weeds from the ground. In FIG. 2, if the blade 16 in this portion is shaped so as to protrude to the right side of the handle with respect to the right side surface of the handle, this weeding operation will be easier.
In Fig. 3, the height difference from the horizontal surface 45 to the lower surface 28 of the front end of the handle is the rising part, and this height difference and the slanted handle move the fingers gripping the handle away from the ground as shown in Fig. 5. The handle can be grasped at a low position close to the ground, avoiding interference.
In order to ensure a distance between the fingers gripping the handle and the ground, and to weed by grasping the handle at a low position close to the ground, the height of the rising part is preferably about 15 mm. In the weeding implement with the shape shown in Fig. 1, if the difference in height of the rising part becomes large, the front part of the handle will interfere with the ground in the weeding method shown in Fig. 15.
This easy-to-use method of weeding becomes impossible.

The center line of the handle refers to the straight line connecting the center of the thickness of each cross section at both ends of the 50 mm central section of the length of the handle, and its extension. In FIG. 3, 36 is the center line of the handle.
For a handle with a total length exceeding 170 mm, the above-mentioned straight line and its extension line shall be the center line of the handle in a 50 mm section of the central portion of the length 170 mm from the tip.

The handle width center line is a straight line that serves as a reference for drawing the angle reference line of the blade.
With the top of the blade facing upward and the handle horizontal, mark the positions of both ends of the 50mm section at the center of the length of the handle on the top of the handle, and from the light source directly above the blade to the horizontal surface of the blade. This is a straight line connecting the centers of the handle widths at both end positions of the 50 mm section, and its extension line, in a plan view of the posture in which the projected area is maximum. In FIG. 2, 18 is the handle width center line.
For a handle with a total length exceeding 170 mm, the above straight line and its extension line shall be the handle width center line in a 50 mm section at the center of the 170 mm length from the tip.

A flat blade is a blade with a length of 20 mm or more formed on the flat edge of the blade plate or an edge close to the flat surface, and with a deviation ratio of less than 5% due to blade bending. , a concave arcuate blade, or an obtuse-angled blade.
Flat blades also include blades that are formed with curved edges that protrude downward from the flat surface, and whose deviation ratio due to blade bending is less than 5%. Blades whose side edges are slightly bent upward and whose deviation ratio due to blade bending is less than 2% also belong to flat blades.

A flat plate means a plate in which the entire blade plate or the left or right edge of the blade plate is flat or nearly flat. Here, it is used to mean a plate, including a flat plate, whose side edges are bent in a shape that gently protrudes downward, and whose deviation ratio due to blade bending is less than 5%. A blade that is slightly bent upward and has a deviation ratio of less than 2% due to the bending of the blade is also treated as a flat plate. A blade plate of the above shape with holes drilled in it to reduce weight is treated as a flat plate.
When referring to the entire blade plate, the flat blade plate mentioned above or a blade plate close to the flat plane is the flat blade plate, and when referring only to the side edge part, the blade plate is the part of the plate 10 mm wide from the edge of each left and right edge. A length of 70% or more of the total length of the side edge of the blade plate, including the part where no If the edges are flat, the side edges are said to be flat.
This means that if 70% or more of the length of the left or right edge in plan view is a flat plate,
This is because it can be determined that it is possible to form a blade with almost the same function as a blade plate whose entire edge is a flat plate.

The deviation will be explained with reference to FIGS. 43 to 45. FIG. 43 is a plan view of a weeding tool equipped with a convex-shaped blade 100 on the left edge of the blade plate, and FIG. 44 is a plan view of a weeding tool equipped with a concave-shaped blade 110 on the left edge of the blade plate. Although the shapes and sizes of the blade plates are different, each front view has the same shape as in FIG. 3.
The distance 103 from the point where the cutting edge is furthest from the straight line 101, 111 connecting both ends of the convex-bow-shaped blade and the concave-bow-shaped blade is the deviation of the convex-bow-shaped blade, and 113 is the concave-bow-shaped blade. deviation, expressed in millimeters.
The ratio of deviation is the ratio of deviation 103 to the length 102 of the straight line connecting both ends of the blade,
Similarly, the ratio of the deviation 113 to the straight line length 112 is expressed as a percentage of the deviation. In FIG. 43, it is about 26%, and in FIG. 44, it is about 6%.
In a plan view of the posture where the projected area from the light source directly above the blade plate onto the horizontal plane of the blade plate is maximum,
The deviation and deviation ratio of a flat blade plate whose edge protrudes at an obtuse angle of 120 degrees or more, or is concave at an obtuse angle of 120 degrees or more, and the deviation ratio are the same as for the convex-bow-shaped blade and concave-bow-shaped blade described above. Expressed in
The deviation due to the bending of the blade and the ratio of deviation due to the bending of the blade with respect to the plane are similarly expressed as follows.
FIG. 45 is a front view of the basic posture of a weeding tool equipped with a blade curved in such a way that the side edge protrudes downward. In a state in which the end 125 is in contact with the horizontal surface 45, the projected area of the blade plate from the light source directly above the blade plate onto the horizontal plane is maximized. However, in this figure, the side edge blades are formed on the upper edge of the blade plate.
In FIG. 45, the rear end 125 of the side edge and the front end 126 of the blade on the side edge are connected by a straight line 127,
The distance 129 from the farthest part of the blade from this straight line is the deviation due to the bending of the blade, and the ratio of the deviation 129 due to the bending of the blade to the length 128 of this straight line is the deviation due to the bending of the blade. Let it be a ratio. In this figure, the ratio of deviation due to blade bending is approximately 10%.
The ratio of deviation due to blade bending is also expressed in the same way for a blade whose portion in front of the rear end of the side edge is bent not in an arch shape but in an obtuse angle shape of 120 degrees or more and protrudes downward.
If the blade plate has a shape in which the front part of the side edge is bent back, the bent back part will be excluded from the judgment.

A linear blade is a blade that is 20 mm or more in length and formed on a straight edge when viewed from above in a position where the projected area of the blade plate on the horizontal plane is maximized from the light source directly above the blade plate. A convex-shaped blade with a deviation ratio of less than 5% is also referred to as a concave-shaped blade. A blade with a deviation ratio of less than 5%, which is formed with an obtuse-angled protruding edge or an obtuse-angled concave edge with each edge having a length of 10 mm or more, is also treated as a straight edge.
However, if the length of the blade is less than 20 mm, the expression "straight blade" is used.
For both blades, the ratio of deviation due to blade bending is less than 5%.
It is also possible to form two consecutive straight blades at a certain angle on the same edge, and with this shape, in addition to being able to use each straight blade alone, it is also possible to form two straight blades in succession at a certain angle. The apex where the two intersect can be used to scoop up the ground at the base of the weed, or to dig it up by stabbing into the base of the weed.
The blade 6 on the left edge of FIG. 1 is an example of a straight blade, and is suitable for use in simultaneously scraping a plurality of weeds using the entire width of the blade.
A linear blade formed on the front edge of the blade plate with an angle of 120 degrees or more and 180 degrees or less relative to the blade angle reference line, and if the width of the blade is narrow from side to side, the weeds are scraped one by one using a push cutter. It can be used to dig up weeds by stabbing them at the base of weeds, and those with wide left and right blades can be used to scrape off multiple weeds at the same time.
In the case of a blade having a plurality of shapes on the same side edge, such as the right edge in FIG. 43, each blade is treated as a linear blade and a convex arcuate blade in this figure. The obtuse-angled protruding portion 105 is treated as an obtuse-angled blade.

A convex arcuate blade is one in which the length of the blade is 20 mm or more, the edge of the blade plate is formed in an arch shape with a diameter of 10 mm or more, and the edge of the plate protrudes outward, and the deviation ratio is 5. % or more, and the deviation ratio due to blade bending is less than 5%. The blade 7 on the right edge of FIG. 1 is an example of a convex arcuate blade.
This shaped blade is suitable for scooping the ground at the base of weeds in a concave shape and for scraping the ground at the base of weeds by rotating the blade, and can be used for the various purposes described in the description of the weeding tool in Example 1. It is.
Disc-shaped or elliptical plate-shaped blade plates, blade plates in the shape of a part of a disc-shaped or elliptical plate, straight blades, or continuous blades that are close to a straight line, similar to a polygonal shape. A blade that is formed with a convex-arch edge and satisfies the above conditions is also a convex-arch blade.
The convex-bow-shaped blade is a convex-arch-shaped blade and a blade formed on the edge of a plate that protrudes outward in an arched shape,
The deviation ratio is less than 5%, which does not apply to the above convex arcuate blade, and the deviation ratio due to blade bending is 5%.
This is a general term for blades with a length of 20 mm or more, including blades with a length of less than 20 mm.
It is also possible to provide a plurality of convex-shaped blades with different arc sizes on the same side edge.
The convex-shaped blade placed on the front edge of the blade plate can be used to scrape the ground into a concave or concave shape.
The convex-shaped blade disposed at the front edge of the blade plate can also have a fan-shaped blade shape, if the blade plate has a blade shape that is wider at the front than the base of the blade plate. The convex-shaped blade formed on the front edge of the fan-shaped blade plate is
Compared to a convex-shaped blade formed on the side edge, it is easier to press the blade and turn the handle left and right multiple times, and it is possible to weed by penetrating the blade over a wide width.
An obtuse-angled blade is a blade formed on an obtuse-shaped protruding edge that falls within the angle range of the obtuse angle, and the length of each edge constituting the obtuse-angled blade is 10 mm or more. The obtuse-angled blade formed on the side edge is
Similar to the convex-shaped blade, it is possible to perform weeding operations by scooping up weeds from the ground, and in addition, it is possible to weed by pressing the obtuse-angled blade and turning to scrape and break up the ground. The angle of the obtuse-angled blade on the leading edge is 12
Items with a temperature of 0 degrees or more can be pressed and shaved with individual linear blades by using the front and back sides of the blade plate.
If the two blades constituting the obtuse-angled blade satisfy the above-mentioned conditions for a straight blade or a convex arcuate blade, each blade is treated as an independent linear blade or a convex arcuate blade. The edge of the obtuse edge, which is composed of two blades including a straight edge, is also an edge with a straight edge.
Blades with an obtuse angle whose apex has a rounded shape less than an arc with a diameter of 10 mm and a blade length of 20 mm or more are included in obtuse angle blades.
Obtuse-angled protruding portion 1 of the front part of the blade plate in FIG. 24, the front part of the blade plate in FIG. 43, and the blade on the right edge.
05 is an example of an obtuse-angled blade.

The concave-arch shaped blade refers to a blade formed with an edge arched inward from a straight line 111 connecting both ends of the blade, such as the blade 110 on the left edge in FIG. The ratio of deviation due to blade bending shall be less than 5%. If the deviation ratio is limited to 5% or more, the expression "concave arcuate blade" is used.
Using the concave-shaped blade formed on the left edge, with the blade in close contact with the ground, swing the weeding tool to the left to scrape the ground, and the concave-shaped blade will rotate in a convex shape. Because it moves and scrapes the ground in a stroking motion, it is easier to scrape than a straight blade, and it is possible to scrape the ground very thinly, making it suitable for scraping small weeds with shallow roots that are densely grown.
However, if the blade plate is tilted with respect to the ground, the central blade will float above the ground, so it is unsuitable for applications that cut the ground somewhat deeply, unless the deviation ratio is small.

The bent blade is a blade whose side edge of the blade plate is bent in a shape such that it protrudes downward as shown in FIG. 45. In FIG. 45, the angle 135 between the horizontal plane 45 and the center line 36 of the handle is 20 degrees, and the side edge rear end 12
5 is in contact with a horizontal plane and the blade has a deviation ratio of 5% or more due to blade bending in the basic position where the projected area of the blade plate onto the horizontal plane from the light source directly above the blade plate is maximum. A blade with a deviation ratio of less than 5% due to blade bending and a length of 20 mm or more is treated as a flat blade.
If the front part of the side edge is bent back, the bent back portion is excluded to determine whether or not it is a bent edge. The blade is bent at an obtuse angle between the rear end of the side edge and the front end of the side edge to protrude downward, and the deviation ratio due to the bending of the blade is 5% or more, and the length of each edge of the obtuse-angled part is 10 mm or more. The blade is treated as a bent blade.
30 to 32 are examples of a weeding tool having a type 1 bending blade on the left edge and a type 2 bending blade on the right edge.

A type 1 bent blade is one in which the side edge of the concave arch-shaped blade of a flat blade plate is bent into a shape that protrudes downward in an arched manner as shown in Fig. 31, and satisfies the above-mentioned conditions for a bent blade. As for the blade, the blade 77 on the left edge of the weeding tool shown in FIGS. 30 and 32 is an example of a type 1 bent blade. A blade in which a plurality of straight blades are connected in series to form a similar concave arch shape is bent into a shape that protrudes downward in an arch shape, and a blade that satisfies the above-mentioned conditions for a bent blade also belongs to type 1 bent blade.
In the type 1 bent blade, in the weeding posture shown in Figure 32, the entire side edge of the blade touches the ground at a nearly constant angle, so the blade plate is in contact with the ground at a substantially constant angle, compared to a straight blade formed on a straight edge. Hard to wobble,
It has the advantage of being easy to maintain a constant angle.
In Figure 32, the blade plate is moderately inclined with respect to the ground. When you swing the weeding tool in the direction of the arrow,
The blade, which is moderately inclined to the ground with the entire cutting edge in contact with the ground in a concave arc shape, moves in an arcuate manner as if stroking while turning, so it has the advantage of being easier to scrape than a straight blade. Suitable for removing multiple weeds at the same time.

A type 2 bent blade is a straight side edge of a flat blade plate, a side edge that protrudes outward in a convex shape, or
A blade that satisfies the above-mentioned conditions for a bent blade, in which the side edge protruding outward in an obtuse-angled or trapezoidal shape is bent into a shape protruding toward the lower surface of the blade plate as shown in FIG. 31, Example 7, FIGS. 30 to 32 is a weeding tool equipped with a type 2 bent blade 78 on the right edge.
Compared to a flat, convex-shaped blade, the type 2 bent blade can more easily scoop up weeds from the ground.
Type 2 bent blades can be installed alongside the flat blade on the same side edge by bending only a portion of the side edge of the flat blade into a shape that protrudes downward. It has the advantage of being able to use two types of blades.
A blade plate with the shape of a rounded spoon with a blade formed on the edge, and a blade plate with the same shape without a bottom,
Included in type 2 bending blade. The weeding operation of scooping the ground with the blade formed on the edge of this spoon-shaped blade plate and the weeding operation of scraping the ground are similar to weeding with the blade 78 on the right edge of FIGS. 30 to 32. .

Blades 80 and 83 on the left edge of FIG. 37 are examples of twisting blades. Twisted blades are made by twisting the side edges and using different sections of the blades on the same left or right edge without changing the angle between the ground and the handle.
It is designed so that it can be selectively used simply by rotating the handle.
A blade whose side edge is partially twisted will inevitably have a curved shape, so the edge on the same side will have blades with a plurality of shapes. Blades whose side edges are bent in diagonal directions also belong to twisted blades.
The twisted blade keeps the angle between the ground and the handle constant, keeping the angle of the handle at a suitable angle for ease of use, and by rotating the handle, multiple blades on the edge of the same side can be selectively used, making it easy to use in the same weeding direction. It has the advantage of being able to remove weeds with blades of multiple shapes.
FIG. 36 is a plan view of the weeding tool of Example 8 with the handle in a horizontal position, and FIG. 37 is a front view thereof. FIG. 38 shows a posture in which the handle is grasped and the angle between the horizontal plane and the center line of the handle is 25 degrees.
From the posture shown in Fig. 38, the handle is rotated slightly to the left, and the bent blade 83 is used to scoop up the ground at the base of the weed, and when the handle is further rotated to the left to take the position shown in Fig. 39, the bent blade 83 is away from the ground, the entire area of the linear blade 80 is in contact with the ground, the blade is inclined in the weeding direction, the blade plate is at an appropriate inclination angle to the ground, and the weeding tool is swung to the left to scrape the surface. It is possible.

A weeding tool with a spoon-shaped blade plate is a blade with a blade formed on the edge of a blade plate similar in shape to a rounded spoon, which is attached to the front part of the handle. The operation of scraping the ground is as if scooping the ground left and right with a spoon, and the function is the same even without the bottom part of the spoon.
The spoon-shaped blade plate can be used not only for weeding operations such as scooping up the ground, but also when the blade plate is turned upside down.
It can perform operations such as cutting down the ground, pushing and scraping with the front blade, and weeding relatively hard ground. It can be considered as a type 2 bent blade, which has convex arch-shaped blades formed on the left and right edges of a flat blade plate bent toward the bottom side, and is classified according to the shape of the blade as a type 2 bent blade. It will be done.
Embodiment 9, FIGS. 40 to 42, shows a weeding tool equipped with a blade plate in the shape of an upside-down spoon, which is functionally different from a weeding tool equipped with a spoon-shaped blade plate. Even if there is no part corresponding to the bottom of the spoon, it is functionally the same.
This weeding tool has a shape similar to that of a small shovel that can be operated with one hand, but it differs from a shovel in that the blade plate and handle have a stepped shape in the front view, Figure 41.
The distance between the handle and the ground is ensured to make it easier to grasp the handle, and the blade plate can be swung from side to side to remove weeds while being held firmly in place.
In the posture shown in Figure 41, when the blades on the left and right edges are at an appropriate inclination to the ground and are in contact with the ground at the same time and swung left and right, it is possible to weed twice in one reciprocation, and it can also be used for many other purposes. It can be used for.
The type 1 bending blade 77 shown in FIG. 30 has a concave arcuate side edge of a flat plate bent to protrude downward as shown in FIG. 31, whereas the weeding blade 77 shown in FIGS. The tool is characterized by having edges on the left and right sides of the blade plate that are similar in shape to the convex arch-shaped side edges of a flat plate bent into a shape that projects upward.
If the side edges of the blade plate are made into a shape with angular edges, the side edge blades will have a straight blade or a shape close to a straight blade, so when the blade is in a weeding position with the blade facing down, the left and right edges will be on the ground. On the other hand, the slanted linear blade can be used for planing in both left and right directions, and the leading edge blade can be used for push cutting.
The right edge, left edge, and front edge can also have different shapes.
Blades with similar blade shapes to the weeding tools shown in Figures 40 to 42 include fan-shaped, trapezoidal, inverted trapezoidal,
A rectangular, flat blade plate with a central part protruding upward from the left and right edges, i.e. a conical cylinder, a blade plate shape in which a part of a cylinder is cut out, and a roof. The shape of the blade also allows the left and right edges to touch the horizontal surface at the same time while being slanted, so if you swing it left and right, you can weed twice in one reciprocation. By flipping it over and pushing the handle, you can scrape the ground into a concave or shallow valley.
Similar to the roof shape, when the cross-sectional shape is bent into a square shape, the blade on the left edge and the blade on the right edge can be used as blades with different angles to the ground. The bent shape of the cross section can also be made into a trapezoidal shape. Blade plates with these shapes also belong to blade plates with the shape of a spoon turned upside down.

The blade angle reference line is a straight line that is perpendicular to the center line of the handle width, and serves as a reference for expressing the angle of a blade whose side edge is a flat blade. In FIG. 2, a straight line 19 perpendicular to the handle width center line 18 is the angle reference line of the blade.

The angle of the blade refers to the straight blade formed on the blade plate, the convex-shaped blade with a deviation ratio of less than 10%,
Similarly, regarding the concave arch-shaped blade, the angle with respect to the angle reference line 19 of the blade is expressed in the range of 0 degrees to less than 180 degrees when viewed from above in the basic posture. The straight edge formed on the leading edge may also have a 180 degree edge.
When weeding by scraping the ground with a straight blade formed on the side edge, the blade inclined with respect to the weeding direction 55 in FIG. 7 has the advantages described in "Means for Solving the Problem".
As a measure of the degree of inclination of a blade that has this advantage, the following is used for a straight blade, a convex blade with a deviation ratio of less than 10% that is close to a straight blade, and a concave blade. Represents the angle of the blade.

The blade angle of the linear blade represents the degree of inclination of the linear blade with respect to the blade angle reference line.
In order to express the blade angle of a straight blade, it is necessary that the blade is a straight line in a plan view.If the blade corresponds to a straight blade but is not straight, it will be a straight blade in a plan view of the basic posture. The straight line connecting both ends of is regarded as the blade, and the angle between this straight line and the blade angle reference line is expressed.
In FIG. 2, a blade angle reference line 19 perpendicular to the handle width center line 18 is drawn, and the angle 20 between this blade angle reference line and the linear blade 6 is the blade angle of the linear blade.
The angle reference line of the blade is 0 degrees, and the angle value increases clockwise for a straight blade on the left edge and counterclockwise for a straight blade on the right edge in the range from 0 degrees to less than 180 degrees. represent. However, the straight edge formed on the leading edge may also have a 180 degree edge.
If the blade plate has a shape in which straight blades and blades of other shapes coexist on the same side edge, the straight line connecting both ends of the longest section corresponding to the straight blade and the blade in plan view in the basic posture. The angle with the angle reference line is the blade angle of the straight blade.

The blade angle of a convex arch-shaped blade represents the average inclination of the convex-arch blade with respect to the blade angle reference line in a blade in which the deviation ratio of the convex arch-shaped blade is less than 10%.
Connecting both ends of the convex arcuate blade with a deviation ratio of less than 10% in a planar view in the basic posture with a straight line,
The angle between this straight line and the blade angle reference line is expressed as the blade angle of a convex arcuate blade in the same way as the blade angle of a straight blade.
Convex arcuate blades are versatile blades, with a range of blade angles suitable for each specific application.
For blades with a deviation ratio of 10% or more over the entire convex arcuate blade, the section is divided and partial blade angles suitable for each application are expressed as follows.
A straight line with a length of 10 mm connects any section of the convex arcuate blade, and for the section divided into blades where the deviation ratio of that section is less than 10%, the relationship between that straight line and the blade angle reference line 19. The angle is expressed for each divided interval.
When expressing a partial angle of this 10 mm section, the expression "section angle" is used. The blades in each section have different suitability depending on the angle, so this will be explained below.
As an example, for the edge of the semicircular convex arcuate blade on the left half of a weeding tool with a circular and flat blade plate with a diameter of 70 mm, any section can be drawn using the above-mentioned straight line with a length of 10 mm. If we divide the sections by connecting them and express the section angle between the straight line and the blade angle reference line, the approximate range of section angles suitable for each application will be as follows.
Blades with an angle of 40 degrees to 150 degrees are used for plane shaving and concave shavings, blades with an angle of 60 degrees or more are used for turning and stroking, and blades between 90 degrees and 150 degrees are used for weeding by cutting down the ground. 130
Blades with a range of 100° or higher are suitable for press cutting. The blade in the section below 70 degrees can be operated to scrape the ground diagonally backward. A convex arcuate blade with a wide range of section angles, such as in this example, can be used for many types of weeding methods. It is also possible to form convex-shaped blades with partially different arc sizes within the same side edge.

The blade angle of a concave arcuate blade is a concave arch blade with a deviation ratio of less than 10%, when viewed from above in the basic position, the concave arch with respect to the blade angle reference line in the same way as a straight blade. It represents the average inclination of the shaped blade.
Both ends of the concave arcuate blade with a deviation ratio of less than 10% are connected with a straight line, and the angle between this straight line and the blade angle reference line is defined as the blade angle of the concave arcuate blade.

The angle of inclination of the handle refers to the angle of inclination of the handle, when viewed from the front or from the back in the basic position of a weeding tool that has a stepped part at the rising part and the side edge of the blade plate is flat, relative to the horizontal plane to which the lower surface of the side edge is in close contact. It represents the degree of inclination of the center line of the pattern.
In FIG. 3, the angle 40 between the horizontal plane 45 to which the lower surface of the blade plate is in close contact and the center line 36 of the handle is the inclination angle of the handle.
When viewed from the front or from the back with the lower side edge in close contact with the horizontal surface, 0 degrees is when the horizontal surface and the center line of the handle are parallel, and the rear end of the handle is lower than the front end of the handle. If it is low,
It is expressed by adding a minus sign (-) to the angle value.
If the height of the handle has a stepped part at the rising part and the angle of inclination is around 0 degrees, if the height of the rising part is low, the fingers gripping the handle will interfere with the ground, so this height should be set to 35 mm or more. There is a need to. As the distance between the lower surface of the handle and the ground becomes wider, a straight blade with a blade angle of around 90 degrees,
The drawback is that when swinging from side to side to scrape the ground, the weeding tool tends to tilt in the weeding direction the moment a load is applied to the blade. If the angle of inclination of the handle is around 0 degrees, when weeding a plane, the handle will have to be in a horizontal or nearly horizontal position when weeding, so you will need to bend your wrist upwards, making it difficult to work for long periods of time. Not suitable.
In Figure 3, the inclination angle 40 of the handle is 25 degrees, and even if the height of the rising part is low, the front part of the handle can be grasped without interference between the ground and the fingers as shown in Figure 5, and the handle can be held at a low position. can be grasped.
Weeding can be performed by swinging from side to side without bending the wrist, and even when the blade is in the weeding position with the blade turned over, it is possible to perform weeding at an appropriate handle angle, making it easy to use one with an angle of around 20 to 25 degrees.
Although the blade plate shown in FIG. 3 is flat, the side edges of the handle are inclined so that a straight line 29 passing through the gripping lower surface of the handle and parallel to the center line of the handle intersects with the blade plate. Even when using a weeding tool with a curved blade, the handle can be operated at an appropriate angle to the ground, and even in a weeding position with the blade turned over, the weeding tool can be operated at an appropriate angle to the ground. Can be done.

The thickness of the handle is 50 mm at the center of the length of the handle when viewed from the front, with the upper surface of the blade facing upward and the projected area from the light source directly above the blade to the horizontal plane of the blade being maximized. of the section,
The maximum thickness from the bottom of the handle to the top of the handle. In FIG. 3, 37 is the thickness of the handle.
For handles with a length exceeding 170 mm, the procedure is as described above in the 50 mm section of the central portion, which is 170 mm in length from the tip.

In Fig. 3, a handle with a thinner front part means that the upper front surface or the lower front surface of the handle is removed over an area of 15 mm or more from the front end of the handle, and the thickness of the front end is the same as the thickness of the handle ( 37) 80%
Refers to a pattern that is: However, this section of 15 mm or more is the distance from the front end of the handle on a straight line parallel to the center line of the handle. In FIG. 3, numeral 32 indicates the cut-out portion of the front part of the handle.
Figure 3 shows a shape with the front upper surface of the handle removed, but even if the front lower surface is removed, the angle between the blade plate and the center line of the handle can be kept the same by changing the inclination angle of the attachment part 3 of the blade body. Since it can be made into an angle, it is possible to make it functionally equivalent.
This shaped handle prevents interference between the front part of the handle and the ground, even if the length of the blade is relatively short, in the weeding method shown in Figure 15, in which the blade is turned over and the handle is pushed forward and downward to kill weeds. This allows for several easy-to-use weeding methods that can be avoided and weeded in similar positions.
In the weeding posture shown in Figure 6, even if you grasp the front part of the handle, the concave part between your thumb and index finger does not touch the resected part, so the circumference of the front part of the handle becomes shorter due to the resection, but the fingers gripping the handle , the contact area with the palm is not reduced.
A handle with a thinner rear part means that the lower surface of the rear part of the handle is removed, and the thickness of the rear part is made thinner than the thickness of the handle over a length of 15 mm or more from the rear end. The thickness is the thickness of the handle 37
A pattern that is 80% or less of
Reference numeral 33 in FIG. 3 is a cut out portion of the lower rear surface of the handle. In the weeding method shown in Figure 15, in which the blade plate is turned over and the handle is pressed to remove weeds, when the rear corner of the handle is gripped with the palm of the hand and pushed forward and downward to weed, the rear corner of the handle hits the palm of the hand, causing an uncomfortable feeling. It has a shape that fits your hand and is easy to hold and press. This shape makes the weeding method shown in FIG. 15 and the weeding method in which the handle is pushed in a similar posture to be operated very convenient.

Shifting of the blade plate will be explained with reference to FIG. 22.
As the blade angle 20 of the linear blade approaches 0 degrees from 90 degrees, the blade plate becomes shaped to protrude more to the side of the handle. The blade angle 20 of the linear blade of the weeding tool shown in FIG. 22 is 45 degrees, and if there is no shift of the blade plate, the blade will protrude to the left side of the handle as shown by the two-dot chain line, resulting in poor left-right balance.
Weeding by scraping the ground with the straight blade on the left edge is different from cutting weeds with a sickle.
Regardless of whether the weeding direction is to the left, rear left, or backward, it is necessary to firmly press the blade edge across the blade width into the ground.
However, in the blade shown by the two-dot chain line, the straight edge on the left edge has the entire blade protruding to the left side of the handle.
As you get closer to the tip of the blade, the distance from the handle width center line 18 increases and the distance from the point of force increases.
The force to press the blade against the ground becomes weaker.
In order to firmly press the blade to the ground at the tip of the left edge, it is necessary to apply force to rotate the handle to the left while pressing the handle downward, which causes a lot of arm fatigue and reduces operability. Put it away.
In FIG. 22, the left and right balance of the blade plate with respect to the handle width center line 18 is corrected by shifting the blade plate portion indicated by the two-dot chain line to the right. The amount of lateral protrusion of the handle of the linear blade is reduced to make it easier to press the entire area of the linear blade against the ground, and the balance between the left and right sides of the blade plate is corrected.
Shifting the blade plate refers to shifting the blade plate to the right or left with respect to the center line of the handle width to correct the balance between the left and right sides of the blade plate.
The amount of shift of the blade plate will be explained. In FIG. 22, as a result of moving the blade plate to the right to correct the left-right balance, the center 61 of the left-right width 60 of the blade plate at the bottom of the rising part and the handle width center line 18
This deviation distance 62 is the amount of shift of the blade plate and is expressed in millimeters.
Unless the blade plate has a shape with good left and right balance, it is desirable to correct the balance by shifting the blade plate and improve operability.

The front and back of the weeding tool refer to the front and back when the front end of the handle is the front and the rear end is the back. The left and right sides of the weeding tool are the left side in plan view with the top of the blade facing upwards and the front end of the handle facing forward.
Say right.

The tip of the blade plate is the intersection point with a straight line 21 drawn at the front end of the handle and perpendicular to the handle width center line 18 in FIG. For 22,
23 is the tip of the blade plate, which is the end of the blade that protrudes most forward or diagonally forward of the handle.
The front end of the blade plate is the edge of the blade plate that protrudes most forward with respect to the straight line 21 in FIG.
is the front edge of the blade plate. The front end of the blade plate and the tip of the blade plate are not necessarily the same.
For other shapes, the tip of the blade plate and the front end of the blade plate are the same as above when viewed from above in the basic position.
For a blade plate with a straight blade with a blade angle of 180 degrees at the forefront of the blade plate, the entire area of this straight blade is the front end, and if both ends of the straight blade are equidistant from the intersection 22 above, then , intersection point 2 with the side edge
This point will be the tip of the blade. Those with a concave front edge may have two tips.

The rear end of the side edge is the rearmost part of the side edge in contact with the horizontal plane when viewed from the front or from the back in the basic posture, and there is a rear end of the side edge on each of the left and right side edges. 27 in FIG. 3 and 125 in FIG. 45 are the rear ends of the side edges. In the case of the shape shown in FIG. 28, the rear ends of the left and right side edges are the same.
The rear end of the blade plate refers to the rearmost end of either the left or right side edge of the blade plate.

The left edge, right edge, side edge, front edge, and front edge are as explained below.
The blade on the left side of the blade plate when viewed from above with the front end of the handle facing forward and the top surface of the blade plate facing upward, with the light source directly above the blade plate maximizing the projected area of the blade plate on the horizontal plane. The edge to the front edge of the board is the left edge,
The edge on the right side of the blade plate up to the front edge of the blade plate is called the right edge. The left edge and right edge are called the lateral edge.
The front edge is located in front of half of the length of the blade plate in the front-rear direction in the above plan view,
An edge that faces forward or diagonally forward.
The leading edge is the edge at the forefront of the blade plate that faces forward or diagonally forward, and the blade shapes include a convex blade, a straight blade, a concave blade, and two straight blades. It refers to either edge of a blade whose shape is similar to the two sides of the triangle consisting of.
If the leading edge has a convex shape or a shape similar to the two sides of a protruding triangle, the left and right edges of the front end of the leading edge are part of the left edge or right edge. The edge blade is mainly used for weeding by pushing the handle, and the side edge blade on the back side of the front edge is mainly used for weeding by shaking the handle from side to side, so the front edge and side edge are written together. In this case, the side edge refers to the section excluding the leading edge.

Rotating the handle is an operation of turning the handle around its center line, and is mainly an operation for weeding by twisting the gripped handle to the left or right. Rotation of the handle means clockwise, in plan view when weeding.
Or the operation of rotating the handle counterclockwise.

Plane shavings are other than push shavings, in which the blades on the side edges are used to cut left and right, diagonally forward, diagonally backward, and backwards.
A weeding operation that scrapes the ground into thin layers. Plane scraping also includes scraping the ground by shaking the weeding tool from side to side.
Stroking is a weeding method that scrapes the ground while sliding the blade as if stroking the ground.
Compared to cutting in the direction perpendicular to the blade, the cutting width is narrower, but it is easier to cut and is also suitable for weeding damp ground. Convex bow shaped blade, concave bow shaped blade, type 1 bent blade, the operation of swinging the spoon shaped blade from side to side to scrape the ground is to scrape the ground while moving in an arched shape as if the bowed blade were stroking it. Therefore, it has the advantage of being easier to sharpen than a straight blade, just as a curved sword can cut better than a straight sword, similar to the operation of sliding a kitchen knife.
In the operation of scraping the ground in the Y direction in FIG. 10, the linear blade is greatly inclined with respect to the weeding direction and the ground is scraped in a caressing manner, so although the scraping width is narrow, it is an excellent method that is really easy to scrape.
In Figure 18, an explanatory diagram of weeding operation in which the ground is cut down with a convex arcuate blade, the angle of the blade plate to the ground is set to 60
As a degree, it is also possible to scrape by pushing the handle in direction b, slightly diagonally forward of the direction of the tip of the blade.This method is suitable for weeding dry and hard ground, and although the scraping width is narrow, This is a really easy weeding method.
Just as when cutting soft materials with a knife, it is easier to cut by sliding the blade, a long blade is advantageous for stroking and scraping, and is also suitable for weeding damp ground.
The arcuate edge of the blade plate can form a longer blade than a straight edge, and when the tip of the blade is swung left and right from the elbow or wrist to scrape the ground, the movement of the blade becomes arcuate, so it is called a bow. The shaped blade moves in an arched manner, making it suitable for shaving. Weeding by shaking only the tip of the weed from the wrist enables weeding in a shorter repetition cycle than shaking the weed from the elbow, and is suitable for weeding small, densely grown weeds.

Concave shaving refers to a convex-shaped blade or a blade curved in a shape that protrudes from the bottom side.
Place it next to the weed and scoop out the ground at the base of the weed until it is 1mm deep.
This is a weeding method in which the weeds are scraped into a concave shape of approximately 5 mm.
Since the ground around the weeds can be scraped off into small pieces instantly, it is suitable for scraping off scattered weeds one by one, and it is possible to reduce the degree to which the ground is scraped more than the required width. 2 per second
It is possible to repeat the operation relatively quickly, about 3 times.
Concave shaving refers to the operation of shaving the ground into a shallow bow-shaped or shallow V-shaped groove with the above-mentioned blade.
If you scoop it up, it will be a concave shaving, and if you continue shaving it, it will be a concave shaving.
The convex-shaped blade formed on the front edge of the blade plate can also be shaved into a concave shape by pressing the handle.

Swivel shaving is a weeding process in which a convex-shaped blade or a blade curved to protrude downward is pressed against the side or front of the weed as shown in Figure 13, and the handle is rotated counterclockwise to scrape the weed. With this method, the blade moves around the weeds in a sweeping motion, making them easy to scrape and suitable for removing rooted weeds. When turning and scraping with a weeding tool that has a blade of the above shape on the left edge, the direction of rotation of the handle is clockwise.
A fan-shaped blade plate with a convex-shaped blade arranged on the front edge of the blade plate makes it easy to press the blade and turn the handle left and right multiple times, allowing the blade to penetrate in a wide range.
The weed removal method by gouging is a method in which the blade plate is inserted a certain depth into the ground and the handle is rotated or pivoted to cut the roots, which is slightly different from rotary weeding. When performing this operation with a weeding tool that has a straight blade on one side edge and a convex blade on the other side, it is easier to cut by rotating or pivoting the handle toward the side of the convex blade. .
Weeding methods such as whirling and gouging are both effective in removing rooted weeds.

Oshikiri is a weeding method in which the handle is pushed forward or forward and downward to scrape away weeds along with the ground using the blade at the front edge.Weeds can be removed by using both sides of the blade plate as shown in Figures 14 and 15. Since the direction in which the blade is pressed and the direction in which it is scraped are the same, weeding can be done by simply pushing the handle in a straight line.It is an extremely operable and easy-to-use weeding method, and weeding operations can be performed 2 to 3 times per second.
In the push-cutting method shown in Fig. 15, in which the ground is scraped by turning the blade plate upside down, the center line 36 of the handle is inclined with respect to the blade plate, so that the blade plate is at an appropriate angle to the ground. The feature is that the blade is pressed against the ground and moved at the same time by pushing the handle in a straight line. It is a very easy to use and excellent weeding method as it can be used to remove weeds by cutting deep. In the weeding tool shown in Figure 17, in which the center lines of the blade plate and handle are parallel, the direction in which the handle is pushed and the direction of the blade tip are the same, so the blade tends to go straight deep into the ground, making it unsuitable for scraping the ground. be.
By adopting a handle with a thinner rear part, weeding with the blade turned upside down is possible.
Rather than grasping around the periphery of the handle, it is better to wrap around the back of the handle to avoid slipping, and since the back of the handle is in close contact with the palm of your hand, it fits your hand better and is easier to press, making this weeding method easier to use. There is.
In plan view, if you press and scrape with a blade that is inclined with respect to the direction in which you press the handle, it will be the same scraping method as stroking. When weeding by pushing the handle, the blade is tilted to the direction of weeding.
It has the advantage of being easier to cut than a blade that is perpendicular to the weeding direction.

As shown in Figure 18, the weeding method of cutting down the ground involves applying a convex arcuate blade to the side of the weeds, positioning the surface of the blade plate at a steep angle to the ground, and cutting it diagonally downward in the direction of the tip of the blade plate. By pushing the handle in the direction a, a cut is made in the ground and the ground is broken down to remove weeds.It is easier to cut down the ground by twisting the handle left and right. The convex arcuate blade penetrates into the ground as shown by the two-dot chain line in Fig. 19, and is capable of weeding weeds with deep roots that are difficult to weed by plane scraping, as well as weeding relatively hard ground.
This weeding method concentrates the pushing force on the ground where only a portion of the convex arcuate blade is in contact, causing the convex arcuate blade to slide into the ground, which is impossible with a straight blade with a long blade width that contacts the ground. be.
Weeding operations in which the ground is scraped in a crescent shape or stroked in a similar posture to this weeding posture are also possible, and the details are as described in the explanation of how to use the weeding tool in Example 1.

Weeding operations can be repeated in short cycles, resulting in faster weeding speed and reduced time required for weeding work.Although it is small, lightweight, and has a simple structure, it is characterized by the ability to use the same weeding tool to remove weeds using multiple types of weeding methods. Therefore, it is possible to provide a weeding tool with good operability and high utility value.

FIG. 1 is a perspective view of the weeding tool of Example 1. FIG. 2 is a plan view of the weeding tool of Example 1. FIG. 3 is a front view of the weeding tool of Example 1. FIG. 4 is an enlarged cross-sectional view taken along line AA of the weeding tool of Example 1. FIG. 5 shows the weeding tool of Example 1 in a position where the lower surface of the blade plate is in close contact with the ground and the handle is gripped. FIG. 6 is an explanatory diagram of plane shaving with a linear blade of the weeding tool of Example 1. FIG. 7 is an explanatory diagram of weeding using a linear blade inclined with respect to the weeding direction. FIG. 8 is an explanatory diagram showing how to increase the force of pressing the blade plate with the index finger. FIG. 9 is an explanatory diagram showing how to encourage horizontal pushing of the blade plate with the index finger. FIG. 10 is an explanatory diagram of the weeding direction of the inclined linear blade. FIG. 11 is an explanatory diagram of the weeding width in relation to the weeding direction in FIG. 10. FIG. 12 is an explanatory diagram of stroking and scraping with a convex arcuate blade. FIG. 13 is an explanatory diagram of shaving a concave surface with a convex arcuate blade. FIG. 14 is an explanatory diagram of the upper surface of the blade plate facing upward and the front edge of the blade for pressing and shaving. FIG. 15 is an explanatory view of the lower surface of the blade plate facing upward and the blade at the front edge being pressed and scraped. FIG. 16 is a plan view of FIG. 15. FIG. 17 is an explanatory diagram showing that the weeding method of FIG. 15 is impossible with a weeding tool in which the center lines of the blade plate and handle are parallel. FIG. 18 is an explanatory diagram of cutting and scraping the ground by setting the blade plate at a steep angle with respect to the ground. FIG. 19 is an explanatory diagram of the movement of the blade in the operation of cutting down the ground in FIG. 18. FIG. 20 is an explanatory diagram of digging up weeds with the upper surface of the blade plate facing upward. FIG. 21 is an explanatory diagram of digging up weeds with the lower surface of the blade plate facing upward. FIG. 22 is a plan view of the weeding tool of Example 2. FIG. 23 is a plan view of the weeding tool of Example 3. FIG. 24 is a plan view of the weeding tool of Example 4. FIG. 25 is a plan view of the weeding tool of Example 5. FIG. 26 is a front view of the weeding tool of Example 5. FIG. 27 is an enlarged sectional view taken along line BB of the weeding tool of Example 5. FIG. 28 is a plan view of the weeding tool of Example 6. FIG. 29 is a front view of the weeding tool of Example 6. FIG. 30 is a plan view of the weeding tool of Example 7 with the handle in a horizontal position. FIG. 31 is a front view of the weeding tool of Example 7 with the handle in a horizontal position. FIG. 32 is a perspective view of the weeding tool of Example 7 in a position in which a flat surface is scraped with a type 1 bending blade. FIG. 33 is a perspective view of the weeding tool of Example 7 in a posture in which a concave shape is shaved with a two-shaped bent blade. FIG. 34 is an explanatory view of the weeding tool of Example 7 in a posture in which the blade plate is turned over and the blade at the front edge is used to push and scrape. FIG. 35 is a perspective view of the weeding tool of Example 7 in a position where the blade plate is turned over and a part of the type 2 bent blade is used for stroking. FIG. 36 is a plan view of the weeding tool of Example 8, with the handle in a horizontal position. FIG. 37 is a front view of the weeding tool of Example 8, with the handle in a horizontal position. FIG. 38 is a front view of the handle from the posture shown in FIG. 37, with the handle held at an angle of 25 degrees with respect to the horizontal plane. FIG. 39 is a perspective view of a plane shaving position in which the handle is rotated counterclockwise from the position shown in FIG. 38 so that the entire linear blade is in contact with a horizontal surface. FIG. 40 is a plan view of the weeding tool of Example 9. FIG. 41 is a front view of the weeding tool of Example 9. FIG. 42 is an enlarged cross-sectional view of the weeding tool of Example 9 taken along line CC. FIG. 43 is an explanatory diagram of a convex arch-shaped blade and an obtuse-angled blade. FIG. 44 is an explanatory diagram of a concave arcuate blade. FIG. 45 is an explanatory diagram of the bending blade.

In the present invention, a large number of embodiments are shown, and the contents of the specification are wide-ranging. The main points are explained for each section.

Blade plates with different shapes on the left and right edges are different in usability depending on whether the worker's dominant hand is on the right or left. It may be easier to use a blade whose shape is opposite from the left and right sides of the figure in the embodiment.
Only the weeding tool shown in Example 6 and Figure 28 has an exceptionally long blade plate in order to widen the cutting width, but other shapes of weeding tools have a long blade plate from the viewpoint of operability. It is easy to use one with a diameter of around 60mm.

Examples 1 to 4, Fig. 1, and Fig. 22 to Fig. 24 differ in the shape, size, and shape of the blade plate, but the outline shape of the blade body and the shape of the blade plate and handle when viewed from the front are different. The angle and the positional relationship between the blade plate and handle are the same as in FIG. 3, which is a front view of the weeding tool of Example 1, and the cross-sectional shape of the blade plate is the same as in FIG. 22 to 24 are only plan views.

The shape of the handle is the same as that of the weeding tool of Example 1, FIGS. 1 and 3 in both the drawings and explanatory drawings of each example, and the shape of the handle is the same as that of the weeding tool of Example 1, FIG. 1, and FIG. This part is omitted.

EMBODIMENT OF THE INVENTION Hereinafter, the weeding tool of this invention will be demonstrated about Example 1 to Example 9 with reference to FIGS. 1-42. However, FIGS. 1 to 21 relate to the shape and usage of the weeding tool of Example 1.
In each example, except when weeding by holding the handle with both hands, weeding was carried out in parallel by using a small rake held in the other hand to perform weeding operations and expulsion of the weeded weeds in parallel. Leakage is easy to detect and weeding work can be done efficiently. A small, lightweight metal rake with a handle length of about 35 cm is suitable for removing scraped weeds, gathering weeds, and tapping weeds with the back of the rake to remove soil attached to the roots. There is.

FIG. 1 is a perspective view of the weeding tool of Example 1, FIG. 2 is a plan view of the same, FIG. 3 is a front view of the same, and FIG.
It is an enlarged view of A section.
In FIG. 1, the attachment part 3 of the blade body 4 is attached to the lower front surface of the handle 11, the raised part 2 is located at the lower part of the front end 12 of the handle, and the blade plate 1 is located on the front side thereof.
A linear blade 6 is formed on the left edge of the blade plate 1, a convex arcuate blade 7 is formed on the right edge, and the tip of the blade plate has a sharp shape. In FIG. 3, the rising portion 2 has a stepped portion formed by bending the upper and lower portions, and a blade is formed up to a position near the middle of the height of the stepped portion.
This embodiment has a linear blade placed on the left edge, and is a blade that gives priority to right-handed people who use the linear blade to scrape the ground from the right to the left, back left, and back to weed. The layout is as follows. Due to the relationship between handedness and weeding direction, if a left-handed person weeds from left to right with a straight blade, or if a right-handed person uses a convex arcuate blade to weed from right to left, It is slightly easier to use if the shape of the edge of the blade plate is opposite to that shown in Fig. 2. In the weeding method in which weeds are removed by pushing the handle forward and downward, there is almost no difference in operability whether the user is left or right handed.

In FIG. 2, since the shape of the blade plate is left-right asymmetrical, the blade shape is shifted to the right with respect to the handle width center line 18 in order to correct the left-right balance of the blade plate.
The blade angle 20 of the linear blade is 60 degrees, and in plan view during weeding, the blade moves in an inclined state with respect to the weeding direction 55 as shown in FIG. , in FIG.
It is possible to perform a cutting operation in any direction from the X direction to the Y direction.

In FIG. 3, the handle 11 is inclined with respect to the blade plate, and the inclination angle 40 of the handle is set to 25 degrees. By tilting the handle, even if the difference in height of the rising part 2 is small, interference between the fingers gripping the handle and the ground can be avoided as shown in Figure 5, and operation can be done with almost no bending of the wrist, allowing long hours of work. 15 and similar weeding methods in which the blade plate is turned over to weed, there is an advantage that the handle can be operated at an appropriate angle with respect to the ground.
The blade formed in the rising portion 2 serves to cut the ground when the blade penetrates a little deeper to scrape the ground.
The rising part and the slanted handle are designed to keep the fingers gripping the handle away from the ground 50 as shown in Fig. 5 to avoid interference, and to bring the point of force closer to the blade plate by gripping at a position close to the ground near the front end of the handle. You can remove weeds by scraping the ground from side to side while keeping the blade firmly in place.
Furthermore, when weeding operations are repeated at high speed, the closer the gripping portion is to the blade plate, the more advantageous it is in order to instantly and accurately move the blade to the constantly moving weeding start position.
This rising part and sloping handle are useful when weeding weeds that have grown next to stone or concrete walls.
You can avoid interference by moving your fingers holding the handle away from the side of the stone or wall.
A weeding tool whose blade plate and the center line of the handle are parallel has a handle that is almost horizontal in the weeding position shown in Figure 5, which means that the wrist remains bent upwards, so it can be used for long periods of weeding. Not suitable for work. In addition, in the weeding method shown in Figure 15, in which the blade plate is turned over and pressed, the direction in which the handle is pressed and the direction of the blade tip match, as shown in Figure 17, making it easier for the blade to go straight deep into the ground, allowing the weeding operation to scrape the ground thinly. It is unsuitable for

The thicker handle increases the contact area between the fingers and palm of the handle, allowing for a firmer grip, and the slightly oval cross-sectional shape makes it easier to weed by rotating the handle than with a handle with a circular cross-section. The non-slip, thick handle has the advantage of being able to rotate with less force, making it really easy to use.
In Fig. 3, the handle with a thinner front part avoids interference between the front part of the handle and the ground as shown in Figs. Several types of easy-to-use weeding methods can be performed in this position. A handle with a thinner rear part is used in various weeding methods in which the blade is turned over and held so that the rear part of the handle is in contact with the palm of the hand, and the rear part of the handle is pressed against the palm of the hand. Since it fits tightly, there is no discomfort when the rear corner of the handle touches the palm of the hand, and it has the advantage of fitting into the palm of the hand, making it easy to grip and press.

The weeding tool of Example 1 can be used for about 10 types of weeding methods, and the usage will be described below.
This will be explained sequentially with reference to FIGS. 1 to 21.

The first method is to remove weeds by scraping the surface to the left using the slanted linear blade on the left edge of the blade plate.
As shown in FIG. 5, grip the handle and touch the lower surface of the blade plate to the ground 50. Rotate the handle slightly to the left so that the blade plate is slightly inclined to the ground, swing the weeding tool from right to left as shown in Figure 6, and use the blade tilted with respect to the weeding direction 55 as shown in Figure 7. You can scrape the ground and remove multiple weeds at the same time.
As shown in Fig. 5, this weeding tool has a grip at a low position close to the ground, and the thick handle with an oval cross section can be firmly grasped, which is a problem with the weeding tool of Patent Document 5 mentioned above. When scraping the ground with the blades on the side edges, there is no drawback that the entire weeding tool tilts in the weeding direction the moment a load is applied to the blades, and it is also possible to scrape the ground a little deeper.
When the weeding tool is swung from right to left to scrape the ground, the trajectory of the blade becomes arcuate as shown in Figure 6. If you move the weeding implement in a straight line from right to left, you will have to use your whole arm to operate it, making it somewhat less maneuverable and requiring a longer repetition cycle. The operation of swinging from side to side has a short repetition period and is easy to use with good operability.
Depending on the distribution of weeds, you may be able to weed by shaking the weed from your elbow, or shake it from your wrist only.
Weeding may be done in small increments, but it is possible to weed 2 to 4 times per second.
The method shown in Figure 9, in which the index finger is placed on the front right side of the handle, moves the point of effort closer to the blade plate and facilitates the operation of pushing the blade to the left, making weeding operations easier and easier to scrape the ground. This is an excellent operating method that conventional weeding tools do not have.
The weeding method by shaking the weeding implement from side to side is ideal for scraping off many small weeds. After repeating this weeding operation about 5 to 20 times, use a small rake held in the other hand to remove the weeds. Weeding can be done more efficiently by repeating the weeding pattern of removing weeds and scraping the remaining weeds again.

The linear blade of this weeding tool inclined in the weeding direction can select any weeding direction in a 90 degree section from the X direction to the Y direction, as shown in FIG.
In Figures 10 and 11, the width to scrape the ground is X1 when scraping in the X direction, Y1 in the Y direction,
In the Z direction, Z1 is the maximum and Y1 is the minimum.
In this example, when weeding width Z1 is 100%, X1 is 86% and Y1 is 50%.
Weeding can be done with maximum width in the Z direction, but since the blade is perpendicular to the weeding direction, the load on the arm is maximum. The cutting width is the smallest in the Y direction, but the load on the arm is the lightest, and it is possible to weed dry, slightly hard ground that is difficult to weed in the Z direction, as well as weeding weeds with stubborn roots. It is characterized by being easier to scrape and can scrape the ground more easily compared to conventional weeding.It is also suitable for weeding wet ground, and is an excellent weeding method with improved sharpness and usability.
When operating this weeding tool with your left hand and scraping in the Y direction, it is easier to scrape by turning the handle sideways and scraping from right to left than by pulling the handle towards you.
The ease of scraping varies greatly depending on the geology and dryness of the ground, so by using different weeding directions, you can scrape at the maximum width for the ground that is easy to scrape, and narrow the width for hard ground that is difficult to scrape or for weeds with strong roots. Easy to remove when weeding.
Since the blade plate and the handle are adjacent to each other, when weeding in the Y direction, if you press the front end of the handle with your index finger as shown in Figure 8, you can use both hands to remove the blade of the weeding tool of Patent Document 2 mentioned above. You can perform a similar operation with one hand to weeding by pressing the handle against the ground and pulling the handle towards you. Since the blade is highly slanted with respect to the weeding direction, it is possible to scrape the ground with ease, and the shape of the blade plate shifted to the right makes this operation easier.

In the ground where there are many weeds, there will always be some weeding leakage even if you intend to scrape them off. For this scraping, a convex arcuate blade with a narrower cutting width than a straight blade is suitable, and a convex arcuate blade as shown in Figure 13 You can remove weeds instantly by applying it to the root of the weed and twisting your wrist to scoop out the weed. Figure 1
The weeding method of 5, which involves pressing and scraping, is also suitable for scraping off weeds that have not been weeded.

Figures 8 and 9 show how the blade is used with the point of force closer to the blade plate. The blade plate is located just in front of the grip, so by pressing the top of the front part of the handle with your index finger as shown in Figure 8, you can help press the blade against the ground, and as shown in Figure 9, press your index finger against the handle. By applying it to the front right side of the blade, you can help push the blade to the left.

The second method is to remove weeds by scraping with the convex arcuate blade on the right edge of the blade plate.
This weeding method involves swinging the weeding implement to the right as shown in Figure 12, and scraping the ground with a stroke while the convex-arch blade moves in a convex-arch shape.
If you operate the blade by placing your thumb on the front left side of the handle in a manner similar to that shown in Figure 9, the point of effort will move closer to the blade plate, facilitating the operation of pushing the blade to the right, making it easier to shave.
When you swing the weeding tool to the right using your wrist or elbow as a fulcrum, the blade will move in an arcuate manner. Since the convex arcuate blade moves in an arc and scrapes the ground in a stroking motion, the width of the ground scraped is narrow, but it has the advantage of being able to remove weeds with a small amount of force. It is similar to the way that a curved sword cuts better than a straight sword.
In the operation of weeding by swinging the right hand to the right in Fig. 12, it is more convenient to use the operation described below, which involves swinging the tip of the wrist to the right, than by swinging the right arm to remove weeds.
Weeds with shallow roots can be easily scraped by shaking only the tip of the wrist and stroking it, allowing for quick repeated operations.The operation is as follows.
Since this example has a convex arc-shaped blade on the right edge, due to the movable angle of the wrist joint, when operating with the right hand, from the left front to the right front, relative to the direction the operator is facing, the left hand will operate. If so, it is easier to remove weeds by weeding from the left front direction to the right front direction.
Small weeds with shallow roots can be scraped off by placing the convex arcuate blade against the base of the weed and swinging the tip from the wrist about 45 to 60 degrees to the right, allowing repeated weeding operations in short cycles.

The third usage is a weeding method in which the convex arcuate blade is used to scrape the ground in a concave shape. Plane shaving with a straight blade distributes the force of the arm over the entire length of the blade, whereas concave shaving uses a portion of the convex arched edge to scoop only the ground where there are weeds. Since the blade concentrates the force of the arm on this part, it is suitable for weeding single weeds, and the cutting force is stronger than that of a straight blade.
When weeding single weeds that have grown sparsely, a straight blade on the left edge uses the entire width of the blade to scrape the ground, resulting in more ground than necessary, whereas a convex arcuate blade scrapes the ground. The weeding method uses a portion of the weed to scrape the ground into a concave shape, making it possible to scrape only the necessary ground around the weeds.
As shown in Figure 13, you can instantly remove weeds by placing the convex blade on the side of the weeds, twisting your wrist, and scooping the weeds forward to the right. You can also operate the convex arcuate blade by placing it in front of the weed and scooping it out to the other side. This weeding method can also weed weeds on depressed ground that is difficult to remove with a straight blade.
This weeding method involves scraping the ground around the weeds in a shallow concave shape, and it is possible to weed 2 to 3 times per second.By placing your thumb on the left side of the front end of the handle, you can use the convex arcuate blade to remove weeds. It is easier to cut because it can help push the material in the same direction.

This weeding method, which involves scooping the ground with a convex arcuate blade, is also suitable for removing small weeds that grow closely next to stones or concrete structures.
If the height of the stone or concrete structure is high, hold the handle with your left hand and point the convex arcuate blade downward.
Place the underside of the blade along the side of a stone or concrete structure, insert the center of the convex arcuate blade perpendicularly into the ground, and rotate the handle counterclockwise to remove weeds.
In this embodiment, the convex arcuate blade is on the right edge, so when weeding the side of a high wall with the convex arcuate blade facing downward, the right hand will be on the far side from the wall, making it difficult to operate with the right hand, and with the left hand. The operation is as follows.
If the wall or stone is low, you can operate it from above with your right hand.
In the above operation, the handle is oriented diagonally to the ground and the central part of the convex arc blade is used to remove weeds, whereas the handle is oriented vertically and the front part of the blade plate is oriented along the wall surface to infiltrate from above. If you use the method of digging by rotating the handle after digging, you can operate it with your right hand even if the wall is high.
The rising part and the handle that is inclined with respect to the blade plate can keep the fingers gripping the handle away from the wall and avoid interference with the wall.

The fourth method of use is weeding by rotary scraping. In the concave cutting posture shown in Fig. 13,
With the convex arcuate blade pressed against the base of the weed, turn the handle counterclockwise from 60 degrees to 1 degree when viewed from above.
This is a similar technique to stroking and shaving, which involves turning the blade about 20 degrees to the right. The convex arc-shaped blade moves around the weeds, making it easy to scrape them, and it is also possible to weed weeds with wide roots that are difficult to scrape off the surface or scoop up the ground with the convex arc-shaped blade.
This operation can be repeated in a relatively short cycle by rotating the handle using only the tip of the wrist, and the ground around the weeds can be scraped off to a small size.
By placing your thumb on the front left side of the handle, you can increase the force of pressing the convex arcuate blade against the ground, making it easier to shave.
Gripping the handle with both hands and rotating the handle while pressing the convex arcuate blade makes it easier to scrape, and this method is suitable for weeding weeds with wide roots and weeds with rather large plants.

The fifth method of use is a weeding method in which the upper surface 25 of the blade plate faces upward as shown in FIG. 14, and the blade 8 on the front edge of FIG. 1 is used to push and scrape.
In Fig. 14, by applying the cutting edge of the front part of the convex arcuate blade to the ground in front of the weeds and pushing the handle forward, the ground can be scraped thinly to instantly remove weeds. In FIG. 3, the blade plate is inclined so that the angle of the blade plate to the ground becomes shallow with respect to the center line 36 of the handle, so this weeding method is suitable for scraping off shallow-rooted weeds and liverwort. If you press the blade on the front edge and turn the handle multiple times to the left and right, the blade will be able to penetrate more easily and scrape off a slightly wider area.
Weeds with strong roots can be weeded easily by twisting the handle about 15 degrees to the left and right and pressing the front edge of the blade against it, as the blade will penetrate the ground more easily.
For this weeding operation, twist the handle once or twice to the left and right to cause the blade to penetrate the ground, so turn the weeding tool to the left,
It is also effective for weeding weeds with stubborn roots that are difficult to remove with the weeding method of shaking to the right and scraping flat surfaces, and weeding on slightly hard ground. If you hold the handle with both hands, you can press the blade harder, making it easier to weed.

The sixth method is to use the leading edge blade 8 in Figure 1 to turn over the blade plate in Figure 15 and scrape it, which is a unique weeding method for this weeding tool. Ideal for scraping off pieces. This weeding method, in which weeds are scraped by turning the blade over, is a feature not found in conventional weeding tools, and making this possible greatly contributes to improving the ease of use of this weeding tool.
In FIG. 3, this weeding method is made possible by adopting a handle in which the blade plate is inclined with respect to the center line of the handle and the thickness of the front part is reduced. The thinner handle at the back makes this method of weeding easier to use.
In Figure 15, the thickness of the front part of the handle is made thinner to avoid the front part of the handle from interfering with the ground, and the handle is appropriately inclined with respect to the blade plate. The weeding method also has a suitable angle to the ground, making this weeding method really easy to use. It is an excellent weeding method that is frequently used when weeding individual weeds.
In the front view of this embodiment, FIG. 3, a straight line 29 passing through the gripping lower surface of the handle and parallel to the center line of the handle.
By making the shape intersect with the blade plate, the blade plate has an appropriate inclination angle with respect to the ground also in the weeding method shown in FIG. 15.
FIG. 15 is a front view of a weeding tool in a weeding position according to this weeding method, and FIG. 16 is a plan view.
As shown in the picture, by flipping the blade over and gripping the back of the handle with your palm, you can instantly scrape off weeds by pushing the handle. This weeding method uses part of the front edge of the convex arcuate blade to remove weeds, so the width of the weed is narrower than when weeding with a straight blade on the left edge, making it suitable for weeding single weeds. ing.
In Figure 15, miso has a blade plate that is inclined diagonally forward and downward with respect to the center line 36 of the handle.
By pushing the handle in a straight line, the difference in angle between the direction in which the handle is pushed and the direction in which the blade on the front edge of the blade is facing is balanced, allowing you to remove weeds by scraping the ground thinly to a nearly constant depth. It is a characteristic.
In the above-mentioned weeding tool of Patent Document 2, the direction in which the blade is pressed and the direction in which it scrapes are different, so the operation of pressing the blade against the ground and the operation of pulling the handle to scrape the ground are performed simultaneously with both hands. The weeding method involves simply pushing the handle in a straight line, and the blade is pressed against the ground and moved at the same time, making it possible to scrape the ground to a nearly constant depth, making it extremely easy to operate. It is possible to perform weeding operations 2 to 3 times per second.
In this weeding method, it is effective to twist the handle from side to side while pressing the leading edge of the blade against weeds with stubborn roots. This method can also weed hard ground, and by twisting the handle and pressing the blade against it, you can continuously weed the ground in front of the blade from the front side to the front.
In the weeding tool shown in Fig. 17, which has a blade plate parallel to the center line 36 of the handle, the direction in which the blade on the front edge of the blade plate is facing matches the direction in which the handle is pushed, so the blade plate can easily go straight deep into the ground. It is not suitable for scraping weeds by pressing the handle.

The seventh usage is a weeding method in which the convex arcuate blade is tilted at a steep angle to the ground and the handle is pushed to cut down and weed the ground, which is suitable for weeding relatively hard ground. FIG. 18 is an explanatory diagram of this weeding method.
In this weeding method, the convex arcuate blade is set at a steep angle to the ground, and the handle is pushed in the direction the front end of the blade is facing, i.e. in the direction a in Figure 18, to cut down and weed the ground. This is a really effective weed control method on hard ground.
With this weeding method, it is difficult to penetrate the ground with a straight blade because the width of the blade that touches the ground is wide, but with the protruding edge of a convex arcuate blade, only a part of the blade touches the ground. By pressing the handle diagonally downward in the direction of the front end of the blade plate, the blade slides against the resistance of the ground and penetrates, cutting down the ground and weeding.
If you place the convex arcuate blade perpendicular to the ground and press the handle, only a cut will be made in the ground,
By tilting the blade slightly or twisting the handle from side to side, you can cut into the ground and remove weeds.
In the weeding method shown in Fig. 15 described above, the ground is scraped thinly to remove weeds, whereas in this weeding method, the blade plate is set at a steep angle, the convex arcuate blade penetrates slightly deeply into the ground, and the ground is broken down to remove weeds. The points are different.
In Figure 18, grip the rear part of the handle with your palm, tilt the convex arcuate blade at a steep angle to the ground, press the front edge against the ground in front of the right hand of the weed, and push the handle in direction a. .
In FIG. 19, when the handle is pressed, the convex arcuate blade moves forward as shown by the chain double-dashed line and penetrates into the ground, cutting down the ground and weeding. You can weed more easily by using both hands.
This weeding method is also suitable for weeding dry, relatively hard ground that is difficult to scrape with a flat surface.By twisting the handle from side to side while pushing, the blade will penetrate more easily and the ground will be more easily cut.

This weeding method can also be used to remove weeds by scraping the ground in a crescent shape. If you tilt the blade plate a little to the right compared to Figure 18, loosely grasp the rear part of the handle, and press the handle, the convex arcuate blade will have a rounded shape, Figure 3
As the blade plate is inclined with respect to the center line of the handle, the convex arcuate blade penetrates into the ground by turning slightly to the right, and after scraping the ground in the weed area, the force that pushes the handle is generated. If you weaken it, the blade will come out above the ground.
It can scrape the ground into a crescent shape with a V-shaped cross section, shallow at both ends and wide and deep at the center.
Can be used to weed single weeds with deep roots.

In Fig. 18, as the angle between the blade plate and the ground is made gradually smaller from a steep angle,
The cutting method is similar to the press cutting shown in Fig. 15.
A weeding method will be described in which the angle between the blade plate and the ground is about 60 degrees in FIG. 18, and the handle is pressed in the direction b, which is between this cutting down of the ground and the pushing and scraping shown in FIG. 15.
In this weeding method, the pushing force is concentrated on a part of the edge of the convex arcuate blade in contact with the ground, the width of the ground is narrow, and the blade moves diagonally forward to the right, resulting in a stroking process, even on relatively hard ground. It can be scraped off with ease, it is really easy to scrape off, and it is operated using an effective method as follows.
By pushing the handle in the b direction, which is slightly diagonally forward of the direction the tip of the blade is facing, the shaving width is narrow but the shaving force is strong, and single weeds can be easily scraped off 2 to 3 times per second. Iterative operations are possible. This is one of the excellent weeding methods of this weeding tool.

The eighth method of use is to cut weed roots and dig them up into the ground. Patent document 1
With this weeding tool, the operation of stabbing the forked tip into the ground is a preparatory operation for pulling out weeds, whereas with this weeding tool, the tip of the blade is inserted into the ground to a certain depth, and then The difference is that the roots are cut by the edge blade, and the root cutting is already almost completed. This weeding method includes surface scraping,
It is also suitable for weeds with slightly deeper roots than weeds that are removed by pressing and scraping.
Compared to the weeding tool disclosed in Patent Document 1, in which a sharp weeding claw is inserted into the ground and the entire root is pulled out, it is easier to dig up the weeding tool since the root cutting is almost completed.
FIG. 20 shows digging with the top surface of the blade facing upward, and FIG. 21 shows digging with the bottom surface of the blade facing upward. In FIG. 21, if you grip the rear part of the handle with your palm, it will not slip even if you grip it loosely, and it will be easy to push the handle and insert the blade.
In the weeding tool of Patent Document 1, weeds are pulled out by pushing down on the rear part of the handle, but in this weeding method, the root cutting is almost completed when the blade plate is inserted into the ground, so the handle is pulled out using the convex arcuate blade as a fulcrum. By rotating the , you can dig up the ground above the blade plate that has penetrated into the ground, including the weeds.
In the operation of rotating the handle, a handle with a thick elliptical cross section is suitable for this operation because it can be rotated with less force and is less slippery than one with a circular cross section. The weeding method shown in Fig. 21 has good operability, and the series of operations of stabbing the front part of the blade plate into the base of the weed and digging up the thick oval-shaped handle by rotating the handle clockwise is compared to the weeding tool of Patent Document 1. It can be repeated in short cycles, and weeding operations can be performed approximately twice per second.
As shown in Figures 20 and 21, insert the blade diagonally downward in front of the root of the weed, and then
Now, dig up the weeds by rotating the handle or pushing down on the back of the handle. In FIG. 21, the handle is rotated and dug.
Digging by rotating the handle is easier to operate and allows for faster repeated operations. The protruding edge of the convex arcuate blade can be used as a fulcrum when rotating the handle and digging.
Fig. 20 is suitable for removing weeds with shallow roots, and Fig. 21 is suitable for removing weeds with slightly deep roots. By using the upper and lower surfaces of the blade depending on the weeds to be weeded, the depth of digging and the angle of penetration of the blade into the ground can be selected.
The weeding operation performed by turning the blade plate upside down in Figure 21 is effective even against small weeds that are difficult to scrape off.
A series of operations in which the front part of the blade plate is inserted into the base of the weed and the handle is rotated to dig up the sparsely grown weeds.
It is suitable for removing a large number of weeds with slightly established roots, and the operation can be repeated approximately twice per second.
If the blade plate is set at a steep angle in FIG. 20, deeper digging is possible. This weeding operation is also suitable for removing oxalis bulbs, a troublesome weed that cannot be removed by ground-scraping weeding methods.

The ninth method of use is a weeding method in which the roots of weeds are scooped out by cutting the roots, which is effective for weeding single weeds with widely spread roots. In the posture shown in Figure 20, insert the blade plate deeply diagonally downward from the front of the weed's root, and turn the handle to the right to cut the root and weed. When used in conjunction with the rotation of the handle, small gouges can be made. Larger weeds can be removed more easily by holding the handle with both hands.

The tenth usage is for weeding dry and hardened ground or ground mixed with pebbles. It is difficult to remove weeds by scraping on such ground, and this weeding method concentrates the pushing force on the narrow blade width part where the tip of the blade plate touches the ground, and twists the handle from side to side to remove weeds from the tip of the blade plate. This is an effective method of weeding on hard ground, as it presses the weeds against the roots of the weeds.
In the same position as in Figure 15, with the lower surface of the blade facing upward, place the tip of the blade against the ground in front of the roots of the weeds.
By twisting the handle slightly to the left and right and pressing the blade against it, the tip penetrates into the ground, making it easier to remove weeds. This weeding method is effective on hard ground, as it can be removed by pressing the tip of the blade and twisting the handle once or twice.
Similarly, even on ground mixed with pebbles, by slightly twisting the handle left and right and pressing against the tip of the blade plate, the tip of the blade moves through the pebbles and weeds can be easily removed.
This weeding method is also effective for weeding weeds with stubborn roots, and by twisting the handle and pressing the tip of the blade plate, the blade can easily penetrate, and is used to remove weeds that are difficult to scrape off. This is the best method for

The eleventh usage is a weeding method in which the ground around weeds is scraped into small concave shapes using a curved blade formed at the lower part of the rising part from the rear of the convex arcuate blade.
Place the rear blade of the convex arc-shaped blade and the curved blade formed at the bottom of the rising part in part 16 in Figure 2 on the ground in front of the left side of the weed, and twist your wrist so as to scoop it diagonally forward to the right. , the ground around the weeds can be scraped off to a small size in an instant. When operating with your left hand, place the blade at section 16 on the left front part of the weed and scrape it towards the right front.
In this embodiment, the lower part of the part that rises from the rear of the side edge is shaped to protrude to the right side of the handle, so it is easy to perform weeding operations by scooping up small pieces of the ground at the base of weeds with the curved blade at section 16.
If you use your thumb when operating with your right hand, or your index finger when operating with your left hand, on the left side of the front end of the handle, you can help push the blade to the right, making it easier to shave.

FIG. 22 is a plan view of the weeding tool of Example 2. A blade plate with a similar shape to the weeding tool of Example 1,
The blade angle 20 of the linear blade is 45 degrees, and in the operation of scraping the ground to the left, the weeding width is narrower than that of the weeding tool of Example 1, making it easier to scrape the ground.
10 and 11, in the weeding tool of Example 1, the weeding width X1 when cutting in the X direction is 86% of the weeding width Z1 in the Z direction perpendicular to the blade. In the weeding tool of this embodiment, the weeding width in both the X direction and the Y direction is about 70% of the maximum weeding width. Although the weeding width is the same in the X direction and the Y direction, the weeding operation in the X direction has the advantage of allowing quick repeated operations by swinging the elbow and wrist from side to side.
If you scrape in the direction perpendicular to the straight blade, you can remove weeds at the maximum width, and depending on the dryness of the ground, how easy it is to scrape the ground and weeds, and whether there are obstacles on the left or right, you can either scrape left or right or diagonally backward. ,
You can choose to pull the handle and shave backwards.
The use of the convex arc-shaped blade is the same as that of the weeding tool in Example 1, and the front arcuate edge of the blade has a wider left and right width, making it suitable for pressing and turning. Because it is long, it is easy to use in applications where convex arcuate blades are frequently used.

Example 3, FIG. 23, is a weeding tool in which the weeding tool of Example 1 has a thinner blade plate. Although the rigidity is reduced, it is light in weight, so it is ideal for applications where the operation of swinging to the left and scraping the ground with a linear blade is repeated at high speed, allowing you to scrape the ground continuously and lightly. By using the method shown in Figure 9, which promotes the force of pushing the blade in the direction of weeding, it is easier to use and reduces arm fatigue.
Since the width of the blade plate is narrow, it has the advantage that soil is less likely to adhere to the blade plate when weeding on damp ground compared to the weeding tool of Example 1.
It has a linear blade on the left edge and a convex arcuate blade on the right edge, and can perform weeding operations almost the same as the weeding tool of Example 1 in terms of functionality.
In the weed control method, which involves gouging out the ground around weeds, a wide blade plate creates more frictional resistance when the blade plate is rotated underground, and the deeper the blade is penetrated into the ground, the more the blade is cut. The movement of the plate is restricted, making it difficult to gouge small diameters.
The slender blade plate is easier to penetrate into the ground, giving more freedom when rotating the blade underground.
It has low frictional resistance and a small diameter, making it suitable for making rather deep gouges. It is similar to using a slender saw to cut a circular shape out of a wooden board. In the scooping operation, it is easier to scrape the weed by inserting the blade plate into the base of the weed and then rotating or pivoting the handle toward the convex-shaped blade.
This weeding tool has a narrow blade and a sharp blade shape, making it suitable for weeding in narrow spaces and ideal for removing weeds growing at the base of small flowering trees. Since the blade width is narrow, it is easy to use for removing weeds that grow between crops in the field.
Small weeds growing on soft ground can be removed by ladle-like operation with the front part of the linear blade, and larger weeds can be easily removed by pinching the stem with the other hand. For weeding weeds that grow between the ridges of a field, a convex arcuate blade is better suited for this purpose than a straight blade because it allows for more scooping operations.
The method of turning the blade over and pressing the tip against the base of the weed while twisting the handle from side to side is suitable for weeding hard ground, and even on ground mixed with pebbles, the sharp edge of the blade penetrates through the pebbles, making it easy to weed.
It is also possible to dig up weeds, and since the blade plate is tilted to the left, when the front part of the blade plate is stuck into the base of the weed, the left and right width of the blade plate below the ground is slightly wider, and the handle can be rotated. You can use it to dig it up.
On relatively hard ground, the series of operations of turning the blade over, stabbing the front part into the base of the weed, and rotating the handle to dig it up is easy to use and can be repeated about two times per second.

Embodiment 4, Fig. 24, is a weeding tool with a blade plate shape that is symmetrical in the shape of a wide leaf, and has a convex arcuate blade on both the left and right side edges, and a blade angle of about 70 degrees. It has a 140 degree straight blade. Since it has a convex arcuate blade and a straight blade on the same side edge, it is possible to use two types of blades in the same weeding direction, and it can be used equally well whether your dominant hand is right or left.
The blade on the front edge is for scraping, root cutting, and digging, and by turning the blade over, pressing the tip against the base of the weed, and twisting the handle from side to side, it is possible to weed on hard ground. It can also be used to dig up weeds by inserting the front part of the blade into the base of the weed.
The front edge of the straight blades on both sides of the pointed part is used for pressing and scraping, using the front and back sides of each blade. The straight blades at the rear of the left and right edges are used for flattening, and the convex arcuate blades can be used for a variety of purposes, similar to the weeding tool of Example 1.
It is also possible to cut the roots of weeds that are relatively large and have many stems, and can be used in the following manner.
In the same position as in Figure 20, hold the handle with both hands, angle the blade plate at 30 to 60 degrees to the ground, and place the front edge of the blade plate against the ground in front of the weeds. By tilting the upper body forward and downward, the entire blade plate penetrates into the ground under the weight of the blade, making it easier to cut roots.
This weeding method uses body weight to cut the roots of relatively large weeds without using physical strength. Even weeds with many stems and a base diameter of about 50 to 60 mm can be removed by shifting the position of the blade and repeating this operation about twice. This weed control method is possible because the ground where weeds grow is relatively soft.

25 is a plan view of the weeding tool of Example 5, FIG. 26 is a front view of the weeding tool in a posture in which the lower surface of the blade plate other than the linear blade portion on the left edge is in close contact with the horizontal surface 45, and FIG. 27 is a front view of the weeding tool according to the fifth embodiment It is an enlarged cross-sectional view.
In this embodiment, as shown in FIGS. 26 and 27, the left edge of the straight blade is bent slightly diagonally downward with respect to the blade plate.
With this shape, when pressing the blade plate against the ground and scraping the ground to the left, there is no wobble of the blade plate, and the cutting edge of the straight blade is slightly Since it protrudes diagonally downward, it is easier to scrape the ground thinly, making it suitable for simultaneously scraping multiple weeds with heights ranging from several mm to about 40 mm.
With the lower surface of the blade plate in close contact with the ground and the blade plate pressed against the ground, move from the X direction to the Y direction in Figure 10.
By scraping in the direction, you can scrape off the ground thinly. Pressing the top of the front part of the handle with your index finger can help push the blade into the ground.
If the blade plate is not brought into close contact with the ground but is tilted appropriately, it can be used in the same way as the straight blade of the weeding tool shown in Fig. 1. The convex arcuate blade on the right edge can be used for multiple purposes, similar to the weeding tool of Example 1.

Embodiment 6, FIGS. 28 and 29, show weeding tools in which a rising portion 67 is provided at an intermediate position between the front end and the rear end of the blade plate, and FIG. 28 is a plan view, and FIG. 29 is a front view.
By providing the rising portion at an intermediate position in the length of the blade plate, it is possible to avoid increasing the distance from the lower part of the rising portion to the front end of the blade plate, and this shape is advantageous for weeding tools with long blade plates.
The blade plate is shifted to the right in consideration of left and right balance and is joined with rivets.
Since this embodiment has a long linear blade, it is advantageous for stroking and is suitable for use in planar shaving with a wide shaving width. The convex arc-shaped blade on the right edge is used for stroking, concave shaving, and pressing, and the sharp tip is used for digging out weeds by stabbing them at the base of the weeds.

Embodiment 7, FIGS. 30 and 31 show a weeding tool with a type 1 bent blade on the left edge of the blade plate and a type 2 bent blade on the right edge, and FIG. 30 is a plan view of the handle in a horizontal position. FIG. 31 is a front view. A flat blade plate with a concave arch shape on the left edge and a convex arch shape on the right edge is bent into a shape that gently protrudes downward as shown in Fig. 31, and the left edge 77 is bent in a 1-type shape. The right edge 78 of the blade has a 2-shaped bend.
The blade 77 on the left edge of this weeding tool is unique because it cuts a flat surface by rotating the curved blade. The blade 78 on the right edge is a curved blade that is used for shaving a concave surface, making it easier to scrape the ground as compared to a flat convex arc-shaped blade. The method of using this weed killer is as follows.

The first method is to remove weeds by scraping the surface with the Type 1 bending blade 77 on the left edge. In the weeding posture shown in Fig. 32, the entire blade area of the type 1 bent blade 77 is in contact with the ground in an arcuate manner, the type 2 bent blade on the right edge is floating above the ground, and the blade plate has an appropriate inclination angle with respect to the ground. There is.
Since the blade contacts the ground in an arcuate manner, it is less likely to wobble compared to a straight blade, and when the weeding tool is swung in the direction of the arrow, it contacts the ground in a concave arc shape and slopes moderately to the ground, removing weeds. The blade is slanted to the direction of the blade, and it moves in a convex arch shape while stroking the ground, making it extremely easy to scrape the ground. It is.
This weeding operation takes advantage of the fact that by swinging the weeding tool from side to side, the path of the blade becomes arched, and by moving the arched blade in an arched manner at an appropriate angle to the ground. Weeds are removed by scraping.

The second method is to remove weeds by scraping the ground at the base of weeds in a concave shape using the type 2 bending blade 78 on the right edge. As shown in Figure 33, the blade is placed on the side of the weed and scooped up to the front right to remove weeds, and weeding operations can be performed two to three times per second. A curved blade makes it easier to scrape concave surfaces than a flat convex blade, and can also scrape off weeds that grow on concave ground.

The third weeding method is a weeding method in which a type 2 bending blade 78 on the right edge is used to rotate and scrape.
In FIG. 30, the type 2 bending blade on the right edge is curved from the rear right to the front left.
As shown in Figure 33, place the blade against the side of the weed and rotate the handle counterclockwise in plan view.
When the ground around the weeds is scraped, the blade at the rear of the right edge enters the ground when turning and scraping starts, and then the part of the blade that scrapes the ground slides from the rear of the right edge and gradually moves to the front of the right edge. Move and finish turning. It is a method of stroking and scraping with a curved blade.
This weeding method uses a curved blade that moves around the side of the weed, making it easy to scrape and is suitable for weeding small weeds with widely spread roots. When used in conjunction with the rotation of the handle, it is possible to scrape off small pieces.

The fourth weeding method, as shown in Figure 34, is to turn the blade over and use the leading edge of the blade to scrape the blade, which, like Figure 15, is suitable for removing individual weeds and is really easy to use. It is a method. By placing the front edge of the blade on the base of the weed and pressing the handle, you can instantly scrape and remove weeds.
By twisting the handle left and right in this position and pressing the blade against it, it is possible to weed even hardened ground.

The fifth weeding method is to use the weeding posture shown in Figure 35, with the blade from the front to the center of the Type 2 bent blade at an angle of about 60 degrees to the ground, and the handle facing toward the edge of the blade. This is a weeding method in which the weeds are pushed slightly forward and scraped off one by one. This weeding method involves scraping the blade at a steep angle to the ground. Although the cutting width is narrow, the cutting power is strong, making it suitable for weeding relatively hard ground. This is similar to the operation of pushing the handle in the b direction in FIG. 18.

36 and 37 are a plan view and a front view of the weeding tool of Example 8, with the handle horizontal and the rear portions of the left and right edges in contact with the horizontal plane. FIG. 38 shows a posture in which the handle is gripped and the angle between the horizontal plane 45 and the center line of the handle is 25 degrees from the front view. This embodiment is characterized by having a twisted blade in which the blade plate is twisted.
The blade plate has a twisted shape, with a straight blade 80 on the left edge and a type 2 bent blade 82 on the right edge.
A curved blade 83 is provided at the lower part of the portion rising from the rear of the left edge. A blade is also formed on the curved edge at the bottom rising from the rear of the right edge.
From the position shown in Figure 38, the handle is slightly rotated to the left so that the curved blade 83 at the bottom of the rising part touches the ground from the rear of the left edge, and the weeding operation can be performed by scooping up the ground at the base of the weed with this curved blade. .
When the handle is further rotated to the left to take the position shown in Fig. 39, the curved blade 83 leaves the ground, the entire straight blade 80 contacts the ground in an attitude tilted to the left, and the straight blade part of the blade plate touches the ground. The angle of inclination is moderate. By swinging the weeding tool to the left, you can scrape a flat surface with the linear blade slanted to the weeding direction.
By adding a twist, the angle between the horizontal plane and the handle is kept constant, and the handle is rotated to the left in two steps from the posture shown in Figure 38, keeping the handle at an angle that is easy to use. Its feature is that it can perform concave and flat cuts by selecting the blade.
Compared to Fig. 38, in the case of a blade plate shape without twisting, in order to remove weeds with a straight blade, it is necessary to raise the rear part of the handle until the entire straight blade touches the horizontal plane, and the horizontal plane and handle are Since the angle is steep, operability deteriorates. If the handle is rotated to the left while maintaining the angle between the horizontal plane and the handle so that the entire straight blade is in contact with the horizontal plane, the straight blade will be at a steep angle with respect to the horizontal plane.
The twisted blade of this example allows you to select from two types of blades on the left edge by simply rotating the handle, and each blade can be adjusted so that the angle between the ground and the blade and the angle between the ground and the handle are optimal. It can be used at any angle and can perform flat and concave shavings in the same weeding direction, making it really easy to use. The usage of the type 2 bent blade on the right edge is the same as that of the weeding tool of Example 7.

40 to 42 show the weeding tool of Example 9, in which FIG. 40 is a plan view, FIG. 41 is a front view, and FIG.
is an enlarged cross-sectional view taken along line CC. This embodiment is a weeding tool in the shape of a blade plate with a shallow spoon turned upside down.
A bottomless spoon shaped like an upside-down spoon is functionally similar.
In the figure, the blade is formed on the lower surface side of the blade plate, but it may be formed on the upper surface side.
In the posture shown in Figure 41, the blades on the left and right edges are inclined at the same angle to the horizontal plane and are in contact with it at the same time, so there is no wobbling of the blade plate, and the weeding tool can be swung from side to side while keeping the blade plate pressed against the ground. You can weed in both directions.
By swinging the handle from side to side, the convex-arch blade, which is moderately inclined to the ground, moves in an arc-like stroke, allowing for two weeding operations in one reciprocation. Using either the right or left edge blade,
You can also make a slightly deeper cut by increasing the angle of the blade relative to the ground. When the blade plate is turned over, concave shaving, turning shaving, and weeding methods that break down the ground are possible.
In plan view during weeding, if weeding is done by tilting the weeding tool to the right when weeding to the left, and by tilting the weeding tool to the left when weeding to the right, the weeding width will be narrower, but weeding will be easier.
Embodiment 4 The weeding tool shown in Fig. 24 has a flat blade plate, so when weeding in both left and right directions, the weeding direction is left and right, and the angle of the edge blade to the ground is set for each operation. However, in the weeding tool of this example, the blades on the left and right edges are always in contact with the ground at a moderate slope.
There is no need for this, and it can be used whether your dominant hand is left or right.
This weeding tool can be used on both sides of the blade plate, such as stroking, concave scraping, turning scraping, weeding methods that cut down the ground, and weeding of hardened ground by pushing and scraping with the front blade, pressing and twisting the handle. Can be done.

1 Blade plate 2 Standing part 3 Mounting part 4 Blade body 6 Straight blade 7 Convex bow-shaped blade 8 Front edge blade 11 Handle 12 Front end of handle 13 Rear end of handle 14 Grip part 16 Bent part formed at the bottom of the rise part Rear part of the blade and convex arcuate blade 17 Handle width 18 Handle width center line 19 Blade angle reference line 20 Blade angle of straight blade 21 Straight line perpendicular to the handle width center line drawn at the front end of the handle 22 Front end of the handle Intersection of the straight line perpendicular to the center line of the handle width drawn at the position and the center line of the handle width 23 Tip of the blade plate 24 Front end of the blade plate 25 Upper surface of the blade plate 26 Lower surface of the blade plate 27 Rear end of the side edge 28 Lower surface of the front end of the handle 29 In front view A straight line parallel to the center line of the handle passing through the gripping lower surface of the handle 32 Removal part at the front of the handle 33 Removal part at the rear of the handle 36 Center line of the handle 37 Thickness of the handle 40 Inclination angle of the handle 45 Horizontal plane 50 Ground 55 Weeding direction 60 Left-right width of the blade plate at the bottom of the rising part 61 Center of the left-right width of the blade plate at the bottom of the rising part 62 Shift amount of the blade plate 67 Standing part 77 Type 1 bent blade 78 Type 2 bent blade 80 Straight blade 82 Type 2 bent blade 83 Bent Convex blade 100 Convex blade 101 Straight line connecting both ends of convex blade 102 Length of straight line connecting both ends of convex blade 103 Discrepancy of convex blade 105 Obtuse blade 110 Concave bow Shape of the blade 111 Straight line connecting both ends of the concave arch-shaped blade 112 Length of the straight line connecting both ends of the concave arch-shaped blade 113 Discrepancy of the concave arch-shaped blade 125 Side edge rear end 126 Front end of the side edge blade 127 A straight line connecting the rear end of the side edge and the front end of the blade on that side edge 128 Length of the straight line 127 129 Discrepancy due to bending of the blade 135 Angle between the horizontal plane and the handle X Weeding direction perpendicular to the handle X1 Weeding in the weeding direction X Width Y Weeding direction Y1 parallel to the handle Weeding width in the weeding direction Y Z Weeding direction Z1 perpendicular to the straight blade Weeding width a in the weeding direction Z Weeding direction b that cuts the ground Weeding direction that scrapes the ground (Explanation of main points of the claim )

The present invention has a structure in which a blade body consisting of a blade plate, a rising part, and a mounting part is attached to the front part of a rod-shaped handle, and the blade plate is located just in front of the handle, and the positional relationship between the blade plate and the handle is , In the front view of the basic position of the blade plate and handle described in the explanation of terms, that is, the basic position where the lower surface of the blade plate is in contact with the horizontal plane, the front end of the blade plate protrudes forward of the handle, and the rear end of the blade plate is in contact with the handle. This weeding tool has a common shape for all weeding tools, which is that it is located below the lower surface of the front end of the weeding tool, and the shape of the blade and handle have been devised.
FIG. 3 is a front view of a weeding tool which is a typical shape of the weeding tool of the present invention, and each of the weeding tools in each claim has a blade that is composed of a blade plate, a raised body part, and a mounting part. The positional relationship between the blade plate and the handle is similar to that shown in FIG. 3, with the front end of the blade protruding forward of the handle, and the rear end of the side edge located below the lower surface of the front end of the handle. The shape of the blade plate differs depending on the weeding tool.
If any weeding tool has a handle with a thinner front part, both the front and back sides of the blade plate can be used.
By using a wide variety of weeding methods, you can frequently select a different weeding method for each weed.It is small and lightweight, and can perform high-speed weeding.It is easy to use and has a variety of weeding methods that conventional weeding tools do not have. It has the feature that it can be used in combination with
The thinner front part of the handle greatly contributes to improved functionality.

These weeding tools with a common shape have the same shape as the main parts, that is, the mutual positional relationship between the blade plate and the handle. Weeds are removed by pushing the weeding tool forward and downward.The common problem with conventional weeding tools is that the weeding speed is slow, but the shape allows repeated weeding operations in short cycles, improving operability. This is what I did.
The shape of the blade plate surface can be a flat blade shape, a curved blade shape, a twisted blade shape,
There is one that looks like a spoon upside down. By increasing the width of the blade plate to some extent, one of the side edges can be made into a flat blade and the other side edge can be made into a bent blade or a twisted blade.
The basic blade shapes are straight, convex, concave, and obtuse.
Some have a twist, and others have a pointed front blade.

With this common-shaped weeding tool, the point of force and the point of action are adjacent to each other, so the force of the arm can be efficiently transmitted to the blade plate, and the weeding tool can be swung from side to side at high speed by grasping the handle adjacent to the blade plate. , Suitable for weeding by scraping the ground with the blade on the side edge, reducing the time required for weeding work compared to conventional weeding tools.
Improved efficiency is a common feature of the weeding tools of the present invention.
As shown in Figures 8 and 9, place your index finger on the top or side of the tip of the handle, or place your thumb on the left side of the tip of the weeding tool with the common shape mentioned above, where the blade plate and handle are adjacent to each other. The method brings the point of force closer to the point of action, which helps hold the blade plate and push the blade in the weeding direction, making weeding operations easier and more pleasant and light, which is not possible with conventional weeding tools. This is an excellent use. This encouraging operation is not possible with a weeding tool in which the grip portion and the blade plate are not adjacent to each other, or with a weeding tool in which the height of the rising portion is high.
By having blades of multiple shapes, the deficiencies of one blade can be compensated for by blades of other shapes.
A blade plate with a symmetrical blade shape has the advantage that it can be used equally well by either the left or right hand.
If the blades have the same shape on the left and right edges, the other blade can be used as a spare blade when the normally used blade becomes less sharp, so you can sharpen the blades when the blades on both sides become less sharp. You can lengthen the cycle of this work. Blade wear is unavoidable in weeding work where the ground is scraped, and the advantage is that the frequency of sharpening the blade is roughly halved.

Due to the synergistic effect of the above-mentioned common shape, combined blade shape, and handle shape, the weeding tool of the present invention has a simple structure, but can perform high-speed weeding that is impossible with conventional weeding tools, and can be used in a wide variety of weeding methods. This allows for both functions to be used frequently.
The weeding operation is made easier because the direction in which the blade is pressed and the direction in which the blade is scraped are the same. By providing blades of different shapes on each edge of one blade plate, there is an advantage that a wider variety of weeding methods can be applied without substantially increasing the area of the blade plate.
In addition to being able to weed by using the blades formed on the left edge, right edge, and front edge of the blade plate, the length of the blade plate is relatively short in the weeding position shown in Figure 15 by adopting a handle with a thinner front part. Even with a short blade, it is possible to avoid interference between the front part of the handle and the ground, and it is possible to perform several easy-to-use weeding methods such as flipping the blade plate over and pushing the handle to remove weeds. The feature is that you can instantly select and use any one of them.
This common-shaped weeding tool can be gripped by the blade plate and the adjacent handle at a low position close to the ground, as shown in Figure 5, and the force of the arm can be efficiently transmitted to the blade, allowing it to sweep the ground horizontally in short cycles. Suitable for weeding methods that involve repeated weeding operations.

In order to scrape the ground by swinging the weeding tool from side to side at high speed, it is important that the front part of the handle adjacent to the blade plate be shaped so that it can be grasped at a low position close to the ground. These have common features that greatly contribute to high-speed weeding operations and improved operability.
Therefore, in the case of the blades with a high riser height as shown in Patent Document 5 and Patent Document 7, the position of the grip part is high, resulting in poor operability, and when a load is applied to the blade, the handle rotates and the blade plate is used for weeding. They have the disadvantage that they tend to tilt in one direction, and if the blade plate and the grip are not adjacent to each other, the force of the arm cannot be efficiently transmitted to the blade plate, so all of them are unsuitable for high-speed weeding operations that scrape the ground left and right. .
In the weeding tool of the present invention, compared to Patent Document 5 and Patent Document 7, there is a weeding method in which the ground is scraped by swinging a linear blade that is largely inclined in the weeding direction from side to side, and a weeding method in which the ground is scraped by swinging the arcuate blade from side to side. All weeding methods involve scraping the ground by rotating the blade in a circular motion, which reduces the load on the blade, and combined with the low height of the rising part, makes the blade plate more difficult to tilt, allowing continuous high-speed cutting. It is easy to carry out weeding operations.

Equipped with a handle with a thinner front part, 50mm below the center line of the handle when viewed from the front in the basic position.
Weeding tools that have a shape where one of the straight lines parallel to the center line of the handle intersect with the blade plate through the section can be used to swing from side to side to scrape the ground, and even if the blade length of the blade is relatively short, In a weeding position similar to that shown in Figure 15 with the blade plate turned over, interference between the front part of the handle and the ground can be avoided, making it easier to perform weeding operations by pushing the handle in this position, and making the rear part thinner. The handle makes this weeding operation easier.
In the weeding position shown in Figure 5, since the handle is inclined with respect to the ground, the height of the rising part is relatively low, about 15 mm, and it is possible to avoid interference between the fingers holding the handle and the ground, and it is close to the ground. Since you can hold the handle from a low position, you can weed while keeping the blade firmly in place.
In the weeding tool of the present invention, the handle is gripped at a low position close to the ground, the handle is tilted to the ground, and the weeding tool can be used for weeding operations. The ability to use both sides, combined with the thinner handle at the rear, significantly improves functionality and operability compared to weeding tools that remove weeds in a weeding position with the handle almost parallel to the ground. .
The weeding method of weeding with the blade in an upside-down position is frequently used, and the ability to use this weeding method is the most distinctive feature of the weeding tool of the present invention, which greatly improves the usability of the weeding tool. are doing.

Each claim, with its contents, enables something that cannot be done with conventional weeding tools, or makes weeding operations easier.
The main points of each claim will be explained below. The numbers in [ ] correspond to the claim numbers.
Claims 9 to 15 are a weeding tool that is equipped with a uniquely shaped blade not found in conventional weeding tools, or a linear blade with a blade angle of 25 degrees to 85 degrees, a convex-shaped blade, or a concave-shaped blade. It is equipped with a blade of any shape, and the blade plate is shifted to correct the left and right balance of the blade plate to further improve the ease of scraping the ground. Conditions with thinned handles are excluded.
According to a nineteenth aspect of the present invention, the shape of the rear part of the handle is improved to improve the operability of weeding by pushing the handle with the blade plate turned upside down.
[1]

The weeding tool according to claim 1 has a handle with a thinner front part, so that the weeding tool can be swung from side to side using the blades on the left and right side edges of the blade plate, and the handle can be moved forward and downward. In addition to pressing the blade, if the blade is tilted to the center line of the handle when viewed from the front, even if the length of the blade is relatively short, you can turn the blade over and push the handle forward and downward. It is easy to use and enables several types of weeding methods, something that conventional weeding tools do not have.
In the weeding positions shown in Figures 6 and 12, in which the top surface of the blade faces upward, the weeding tool is swung from side to side, and in the weeding position shown in Figure 14, the ground is scraped by pushing the handle, and the bottom surface of the blade faces upward. Figure 1
5. In the weeding position shown in FIG. 18, it is possible to avoid interference between the front part of the handle and the ground, and to scrape the ground by pushing the handle, making it possible to perform an easy-to-use weeding method. In any weeding position, the center line of the handle is at a suitable angle to the ground, so weeding can be done with almost no bending of the wrist, reducing arm fatigue even during long weeding work, and improving operability. It has a good shape and is easy to use.
Although the shape of each individual blade itself is not particularly distinctive, the above common-shaped weeding tool with a handle with a thinner front part has two types of blades: a straight blade and a convex blade. By doing so, it is possible to perform many types of weeding methods as described in the explanation of the weeding tool in Example 1, and it is possible to incorporate many functions in weeding small weeds despite the simple shape. Among these, there is a weeding method in which the weeds are scraped by turning the blade plate upside down as shown in FIG. 15, a weeding method in which weeds are scraped in the Y direction as shown in FIG. The weeding method of pressing the handle in direction b, which is slightly forward of the front edge of the blade plate, is a feature not found in conventional weeding tools, making it extremely easy to use.
It is frequently used.
Since there is a blade plate just in front of the handle, it is possible to bring the point of force even closer to the blade plate, so you can press the top of the handle with your index finger and press the blade plate against the ground as shown in Figure 8, or press your index finger against the handle as shown in Figure 9. It is easier to press the blade plate to the left by placing it on the right side of the front end of the handle, and to push the blade plate to the right to scrape the ground by placing your thumb on the left side of the front end of the handle.
By using these methods, the burden on the worker can be reduced and weeds can be scraped more easily, and the effect is clearly felt.

Although the weeding tool shown in Figure 1, which has a handle with a thinner front part, has a simple shape, it is capable of about 10 different weeding methods as described in the explanation of how to use the weeding tool in Example 1. You can instantly select the best weeding method for the weeds you want to remove, and frequently use a variety of weeding methods to remove weeds.
On ground with a high density of weeds, the straight blade cuts multiple weeds at the same time, and on ground where the weed spacing is a little wide, the convex blade is used to remove weeds one by one using push scraping, concave scraping, and rotating scraping. By doing so, it is possible to reduce the degree to which the ground is scraped more than the necessary width.
By placing the blade plate just in front of the handle and gripping the handle adjacent to the blade plate at a low position close to the ground, you can swing the weeding tool from side to side while holding the blade well and perform high-speed weeding. be.
Among them, the one with the shape shown in Example 3 and Figure 23 is light in weight and is ideal for high-speed weeding in which weeding is done by swinging it from side to side.Since the blade width is narrow, it is also suitable for weeding in narrow spaces, and is suitable for weeding on damp ground. Sometimes, it has the advantage that soil is less likely to adhere to the blade plate.
The linear blade slanted in the weeding direction can select the weeding direction as shown in Figure 10 and change the weeding width as shown in Figure 11. Ground that is easy to scrape is scraped with the maximum width, and ground that is difficult to scrape with the minimum width. This makes it possible to weed the ground that is difficult to remove and weeds that are difficult to remove. The operation of weeding in the Y direction in Fig. 10 and the weeding method of pushing the handle in the b direction in Fig. 18 allow weeds to be easily scraped off and are really easy to use, a feature not found in other weeding tools.
[2]

This weeding tool has convex-shaped blades on the left and right side edges of a blade plate with flat side edges. The convex-shaped blade provided on the side edge can be used for a variety of purposes, as described in the usage of the weeding tool in Example 1.
A blade with a convex arc shape with a small deviation ratio on one side edge and a convex arc blade with a large deviation ratio on the other side edge, the blade with a small deviation ratio is similar to a straight blade. It is capable of flat surface shaving, allowing you to use the entire width of the blade to scrape off multiple weeds at the same time. A convex arcuate blade with a large deviation ratio can be used with a variety of weeding methods to remove individual weeds.
In other words, by installing convex-arch shaped blades with different ratios of deviation on the left and right edges, the weeding tool has the same function as a weeding tool with a convex-arch blade on one edge and a straight blade on the other edge. You can also do it.
It is also possible to provide a convex-shaped blade with partially different arc sizes on the same side edge to create a blade capable of both flat and concave shavings.
The blade with a convex bow shape on the side edge is symmetrical, allowing the right and left edges to be used under the same conditions.
It can be used equally well whether your dominant hand is left or right. Additionally, when one blade loses its sharpness due to blade wear, the other blade can be used as a spare blade.

Various deviations, deviation ratios, blade angles, and blade section angles of the convex-shaped blade can be formed, and there are many types of overall blade plate shapes that combine these. become.
Depending on the shape of the front part of the arcuate blades formed on the left and right side edges, the front end or tip of the blade plate can be either pointed or arched.
The blade with a sharp front can weed hardened ground or ground mixed with pebbles by pushing the sharp blade against it and twisting the handle, and can be used to dig up roots by stabbing into the base of weeds. can also be used. Wider blades can be used for pushing and cutting roots using your body weight.
If the front end of the blade plate is arched, it can be used for weeding by pressing against the base of weeds and rotating the handle from side to side.
The thinner handle at the front makes it possible to remove weeds by turning the blade over, which greatly contributes to improved operability.
[3]

This claim provides a weeding tool having a convex-arch shaped blade on one side edge and a concave-arch shaped blade with a deviation ratio of 20% or less on the other side edge. A blade with a concave arch-shaped blade with a small deviation ratio can perform surface cutting in the same way as a straight blade.
The operation of scraping weeds by keeping the concave-shaped blade in close contact with the ground and swinging the weeding tool left and right causes the concave-shaped blade to move while rotating in a convex shape, resulting in a dense growth of small weeds. Suitable for scraping the ground very thinly. The convex-shaped blade on the other edge can be used for multiple purposes.
The thinner handle at the front makes it possible to remove weeds by turning the blade over, which greatly contributes to improved operability.
[4]

The obtuse-angled blade on the side edge is in a weeding position with the upper surface facing upward, and one of the two blades that make up the obtuse-angled blade is used to scrape the surface, and the obtuse-angled blade is used to scrape the ground at the base of the weed. It is a versatile blade that can be used for scooping and weeding, and by pressing the obtuse-angled blade and rotating the handle, it can scrape off rooted weeds.
By adopting a handle with a thin front part, the weeding method can be used to cut down the ground similar to the weeding operation in the a direction in Figure 18, with the blade plate turned over, and the weeding width can be narrowed, similar to the weeding operation in the b direction. It is possible to easily scrape away weeds.
Of the two blades that make up the obtuse-angled blade on the side edge, the blade angle of the straight blade located on the front side is 1.
For those with a blade of 20 degrees or more, it is possible to press and shave by using the front and back sides of the blade plate.
The individual blades that make up the obtuse-angled blade can be either straight blades or convex-shaped blades with small deviation.
Can be used alone. It is also possible to form a plurality of obtuse edges on the same side edge.
The blade has a sharp shape at the front of the blade plate, which is the point of intersection with the blade formed on the other side, and is used to dig up weeds by stabbing it into the root of the weed. It can be used for weeding hardened ground or ground mixed with pebbles.
If you install an obtuse-angled blade, a straight blade, a convex-shaped blade, a concave-shaped blade, or a type 2 bent blade on the other side edge, the options for weeding methods will further increase. By frequently using the blade and the front blade of the blade plate, it can be used for many types of weeding methods, such as plane shaving and removing individual weeds.
The advantage of having multiple obtuse-angled blades on the same side edge is that the degree of freedom in the shape of the edge is greater, and the degree of freedom in the angle of the individual straight blades that make up the obtuse-angled blades is also greater. There is.
The thinner handle at the front makes it possible to weed by turning the blade over and weeding, and the combined use of the blade on the front edge or the blade on the other side greatly contributes to improved operability.
[5]

In Figure 1, the weeding tool with a straight blade on one of the left and right edges and a convex blade on the other edge is shown on the left.
Alternatively, when weeding by swinging to the right, the weeding direction is reversed depending on the blade used, so the ease of weeding is slightly different between the left and right directions. By providing a convex arcuate blade and a linear blade on the same side edge, it is possible to use the two types of blades in the same weeding direction, which is easy to use.
In Fig. 24, both the left edge and the right edge have both a convex arcuate blade and a straight blade,
There is an advantage that the convex arcuate blade and the straight blade can be used in the same weeding direction regardless of whether you are left or right handed.
The leading edge blade can be used for scraping, weeding hard ground, gravelly ground, and weeding using body weight.
The weeding tool shown in Fig. 24 has a symmetrical shape, and each side edge has a convex arcuate blade at the center of the side edge, a linear blade at the front of the side edge, and a straight blade at the rear of the side edge. When the sharpness of the blade on the edge that is used regularly decreases, the blade on the other edge can be used as a spare blade. The obtuse-angled leading edge blade can be used for weeding hard ground or weeds with stubborn roots by using your body weight for weeding, or by pressing the tip of the blade and twisting the handle. It is also possible to remove weeds by turning the blade over and using each linear blade on the front edge to scrape the weeds. The left edge and right edge can also be made asymmetrical.
The thinner handle at the front makes it possible to remove weeds by turning the blade over, which greatly contributes to improved operability.
[6]

This weeding tool has straight blades on the left and right side edges, and a convex-shaped blade on the front edge of the blade plate.
Convex-bow shaped blades include many types of blades that protrude into an arched shape, from blades with a shape close to a straight blade with a small deviation ratio to semicircular blades with a large deviation ratio.
Straight blades include convex-shaped blades with a deviation ratio of less than 5%, concave-shaped blades, and similar blades.
Since it also includes an obtuse-angled blade, in addition to the function of a straight blade, it also includes the function of a slightly arched, obtuse-angled, protruding, or recessed blade.
The blade angle of the straight blade on the side edge can be formed at any angle within the range of 25 degrees to 160 degrees.
The blade plate shape can be fan-shaped, rectangular, trapezoidal, or asymmetrical.
The main use of the straight blades on the side edges of the blade plate is for plane scraping, and by swinging from side to side, the entire length of the blade can be used to scrape off multiple weeds at the same time, and weeding operations can be repeated in short cycles. It is possible.
The straight edge blades on the left and right edges are capable of planing in both left and right directions, and the blades with a symmetrical blade shape are
It can be used in the same way whether your dominant hand is left or right. When one straight blade loses its sharpness, the other straight blade can be used as a spare blade.
Types with linear blades that have different blade angles on the left and right edges allow you to change the weeding width depending on whether the weeding direction is to the left or right, and the blade with a wide angle can cut weeds on surfaces that are easy to scrape. , you can choose a blade with a narrower angle for weeding on difficult-to-cut surfaces.

As shown in Figure 5, the handle can be grasped at a low position close to the ground, and by grasping the handle adjacent to the blade plate, the blade can be held down well and the weeding tool can be moved to the left or right without the blade wobbling. Shake it,
It is possible to perform surface cutting at high speed.
The linear blade slanted in the weeding direction can be operated by selecting the weeding direction shown in Figures 10 and 11 and changing the weeding width. By cutting the ground that is easy to remove with the maximum width and the ground that is difficult to remove with the minimum width, Can handle weeding on ground of various hardness.

The convex-shaped blade provided at the front edge of the blade plate can have either a symmetrical shape or an asymmetrical shape in plan view.
It is also possible to change the lengths of the straight blades on the left and right edges so that the convex blade on the front edge is inclined diagonally forward. With this shape, as shown in Figure 3, the center line of the handle is inclined with respect to the blade plate, and the handle has a thinner front part. It is possible to scrape, cut down the ground, and scrape.
The convex-shaped blade on the front edge can be used to remove weeds by turning the blade plate (Fig. It is easy to use for scraping weeds, and by turning the blade over and twisting the handle while pushing and scraping, you can continuously scrape the ground in front of the blade, even on somewhat hard ground.
When the blade plate has a fan-like shape, it is easy to press the convex-shaped blade on the front edge and turn the handle left and right multiple times, and weeding operations can be performed by making the blade plate penetrate widely. The fan-shaped blade plate has linear blades on the left and right side edges that are sloped in the weeding direction, so either the left or right linear blades can
The weeding operation shown in FIGS. 10 and 11 can be performed by selecting the weeding direction and changing the weeding width.
To scrape off multiple weeds at the same time, swing the straight blade to the left or right, scrape diagonally backwards, pull the handle toward you and scrape backwards, or use a convex blade to scrape off one by one. The front and back sides of the blade can be used for pressing and scraping, and the straight and convex blades can be used frequently for weeding work.

If the blade plate has a fan-shaped shape, and the straight blade on the side edge and the convex blade on the front edge intersect at an acute angle, insert the blade at the acute angle into the base of the weed and remove the handle. By rotating, you can scrape away rooted weeds.
A fan-shaped blade or a similar shape with an obtuse-angled blade where the convex-arch shaped blade on the front edge and the linear blade on the side edge are obtuse-angled blades that can be used to scoop up the ground at the base of weeds. can.

The front edge of the convex-shaped blade has a small deviation ratio, with a width of about 30 mm from side to side, and a symmetrical blade shape where the front edge and side edges intersect at an angle of about 85 degrees, and the length of the blade is About 50mm,
Because the blade width is narrow, it is light in weight, and the leading edge blade is suitable for scraping weeds one by one by using the front and back sides of the blade plate.Since the left and right width of the blade plate is narrow, the straight blades on the left and right side edges are suitable for scraping weeds one by one. It is also possible to rotate the handle slightly to the left and right, alternately tilting the blades on the left and right edges moderately to the ground, and scraping alternately to the left and right.
The thinner handle at the front makes it possible to remove weeds by turning the blade over, greatly contributing to improved operability.
[7]

It has straight blades on the left and right side edges, and has two straight blades on the front edge, with an angle of 8 at the apex.
This weeding tool has a blade with a shape similar to the two sides of a triangle, with an angle of 0 degrees or more and less than 180 degrees. If the angle of the apex part is extremely close to 180 degrees, it is equivalent to one straight blade.
That is, if the weeding tool has a pentagonal blade plate and the angle at the vertex is extremely close to 180 degrees, the blade plate will have an inverted trapezoidal shape, a rectangular shape, or a trapezoidal shape.
If the blade angle of the linear blade on the side edge is less than 90 degrees, the weeding width shown in FIGS. 10 and 11 can be selected and removed.
Blades with an angle of 80 degrees or more and less than 120 degrees at the apex of the leading edge can be used for weeding hardened ground or ground mixed with pebbles, digging up weeds, and using body weight by pressing the front end and twisting the handle. For root cutting, blades with an angle of 120 degrees or more at the apex are used to scrape the ground of weeds into a shallow V-shape with the blade at the apex, A straight blade can be used for pressing and cutting by using the front and back sides of the blade plate.
The blade plate shape is trapezoidal or rectangular in shape, and the front and back sides of the blade plate are used for pushing and cutting with the blade on the leading edge, and the left and right ends of the leading edge and the straight front edge of the side edge are used together. It can be used to scoop up the ground at the base of weeds with a blade shaped like the two sides of a triangle. A blade plate with a narrow front edge can be used to scrape off weeds one by one by pressing, or to dig up weeds by stabbing them at the base.
The straight blade on the side edge behind the front edge is for plane shaving, and those with a blade angle of less than 90 degrees are
By selecting the weeding direction shown in Figs. 10 and 11 and changing the weeding width, it is possible to cope with difficult-to-move ground.
The thinner handle at the front makes it possible to remove weeds by turning the blade over, which greatly contributes to improved operability.
[8]

It is a weeding tool with straight blades on the left and right side edges and a straight blade on the front edge, and the blade plate is rectangular in shape.
There are trapezoidal, inverted trapezoidal, and parallelogram-like shapes. The narrow linear blade on the front edge is suitable for scraping weeds one by one, and can also be used to dig up weeds by stabbing them at the base. The wide straight blade on the front edge allows you to scrape off multiple weeds at the same time.
When the blade plate shape is close to a parallelogram, one of the straight blades on the side edge is inclined in the weeding direction. If the tip of the blade plate is narrow and sharp, the left-right balance of the blade plate will be poor, but by shifting the blade plate, the left-right balance can be corrected, and this shape of blade can be used in narrow spaces. It also has the advantage of being easy to use for weeding.
The thinner handle at the front makes it possible to remove weeds by turning the blade over, which greatly contributes to improved operability.
[9]

The operation of pressing the lower surface of the blade plate against the ground and scraping the ground to the left of the weeding tools shown in Figures 25 to 27 is based on the reference plane of the ground where the blade plate does not wobble and the lower surface of the blade plate is in close contact with, and then diagonally downward. The approach angle of the linear blade is fixed, and the linear blade can maintain a shallow approach angle to the surface to be shaved, making it easy to shave the ground thinly. It is easy to scrape off small weeds, and the weeding width can be changed as shown in Figures 10 and 11.
A weed remover with a straight blade in this shape is easy to use for shaving the ground thinly.If the blade plate is tilted moderately without touching the ground, it is possible to cut the weeding tool slightly deeper. It can be used in the same way as a straight blade formed on the side edge. By using the blade formed on the other side edge, you can frequently use blades of multiple shapes to remove weeds.
[10]

This weeding tool is characterized by having a linear blade inclined in the weeding direction with a blade angle of 25 degrees or more and 85 degrees or less on the side edge of the blade plate, and in which the blade plate is shifted by 2 mm or more.
Weeding tools that have a linear blade on one side edge of the blade plate that is slanted in the weeding direction and have an asymmetrical blade on the other side edge may cause the left and right balance of the blade plate to be poor. Balance can be corrected by shifting the blade plate.
By providing the side edges with linear blades that are inclined in the weeding direction, there is an advantage that even if the blade plate has a narrow front plate width, the shape allows a convex-shaped blade to be easily arranged on the front edge.
Compared to weeding tools that have a straight blade with a blade angle of around 90 degrees on the side edge, a convex-shaped blade can be formed on the front edge even if the area of the blade plate is small, which reduces the weight of the blade plate. This will lead to the reduction of
Those with a convex blade on the front edge are easy to perform shallow concave or concave shavings by pushing the handle forward and downward, and can be repeated 2 to 3 times per second. Suitable for scraping weeds one by one.
The operation of swinging the linear blade slanted in the weeding direction left and right in a weeding tool in which the blade plate is located just in front of the handle, and the front part of the handle is gripped and swung left and right to scrape the ground with the blades on the side edges. When viewed from above, it is inevitable that the operator will apply the blade diagonally to the weeds and scrape them off without being conscious of it.
Compared to cutting in the direction perpendicular to the weed, the cutting width is narrower, but it has the advantage of being easier to cut.
In conventional weeding tools that scrape off weeds along with the ground, the weeds are scraped in a direction that is almost perpendicular to the blade, whereas in the present claim, by swinging the weeding tool from side to side, weeds are necessarily scraped in a direction that is not perpendicular to the blade. This requires a cutting operation, and cutting in the orthogonal direction is also possible.
Depending on the difficulty of weeding, such as the hardness of the ground or the tenacity of weed roots, there is the advantage that the weeding direction closer to the Y direction in FIGS. 10 and 11 can be selected to narrow the weeding width. Weeding in the Y direction requires less force than weeding in the orthogonal direction, and can reduce arm fatigue when weeding a relatively large area of ground.

As an example of how to remove weeds in the Y direction, when using the weed remover shown in Figure 1 to uniformly scrape off weeds on the ground with a width of several meters from side to side, the width of the scraping in the front and back direction should be approximately 30 cm, and a rake should be used in combination. The weeding mode in which the weeding operation is performed continuously in the Y direction in FIG. 11 and weeded while moving in the lateral direction reduces arm fatigue and allows for easy weeding. By repeating this weeding pattern, it is possible to weed a relatively wide area, making it suitable for weeding parks and the like.
For fields that are soft and difficult to scrape off weeds from, such as fields, the slender blade plate shown in Figure 23 is suitable. This method of weeding is effective, and a straight blade slanted in the weeding direction is optimal.
The linear blade with a blade angle of 30 degrees is suitable for weeding in the Y direction in Figure 10, i.e., in the weeding direction when swinging the weeding tool from side to side and scraping the ground with the blades on the side edges. The blade has the same effect as pulling a blade at a 150 degree angle toward you and scraping, so you can scrape the ground easily, and the weeding operation is faster than pulling the handle toward you to scrape. It has the advantage of being repeatable.
In a weeding method in which the weeding implement is swung from side to side to scrape the ground, a straight blade that is inclined with respect to the weeding direction has a lower angle to the ground than a straight blade that is at a 90 degree angle to the blade angle reference line. This prevents the blade from wobbling and prevents the blade from penetrating deeply.Although the weeding width is narrower, it has the advantage of being easier to scrape.
As the angle difference between the blade angle and 90 degrees increases, the cutting width becomes narrower when swinging from side to side to scrape the ground, but it is easier to scrape, and the blade plate is less likely to tilt when a load is applied to the blade. , the effect of suppressing the deep penetration of the blade becomes greater. Although the weeding width is narrow, the function of the straight blade has been improved to make it easier to cut.
[11]

Instead of the linear blade of the weeding tool according to claim 10, the angle of the blade is 25 degrees or more and 85 degrees or less,
This weeding tool is equipped with a convex-shaped blade with a deviation ratio of less than 10%, and the blade plate is shifted by 2 mm or more.
A convex-shaped blade with a small deviation ratio is functionally almost equivalent to a straight blade.
[12]

Instead of the linear blade of the weeding tool according to claim 10, the angle of the blade is 25 degrees or more and 85 degrees or less,
This weeding tool is equipped with a concave-shaped blade with a deviation ratio of less than 10%, and the blade plate is shifted by 2 mm or more.
A concave arch-shaped blade with a small deviation ratio is functionally almost equivalent to a straight blade.
[13]

As shown in Fig. 32, the type 1 bent blade has an arcuate blade 77 that is moderately inclined to the ground, and the entire area of the blade touches the ground in a concave arc shape, so the blade plate wobbles more than a straight blade. This has the advantage of making it easy to maintain the blade plate at a constant angle with respect to the ground.
When the weeding tool is swung in the direction of the arrow in the posture shown in Figure 32, the blade, which touches the ground in a concave arc, rotates in a convex arc at an appropriate angle to the ground, scraping the ground in a stroking motion to remove weeds. Therefore, it has the advantage of being easier to cut a plane than a straight blade. Since the entire width of the blade is used to remove weeds, it is suitable for removing multiple weeds at the same time.
The weeding tool shown in FIGS. 30 to 32 has a type 1 bent blade suitable for simultaneously scraping multiple weeds and a multi-function suitable for removing a single weed, as described in the explanation of Example 7. Equipped with two types of bent blades, which can be used frequently for efficient weeding work.
[14]

A twisted blade with a twist on the side edge has multiple shapes formed on the edge of the section of the twisted side edge from the bottom of the rising part to the tip of the side edge without changing the angle between the ground and the handle. It has the advantage of being easy to operate and allows you to select and use the handle at an optimal angle by simply rotating the handle.
The blade on the left edge of Figure 37 is an example of a twisted blade, and this weeding tool can be used by rotating the handle to the left without changing the angle between the center line of the handle and the ground. By selecting a straight edge edge blade or a type 2 bent edge edge, you can perform flat and concave shavings in the same weeding direction. The type 2 bending blade on the right edge has a larger bending diameter and can be used for a variety of purposes like the type 2 bending blade of Example 7.
Compared to using the blades on the left and right edges for weeding, the twisting blade has the same weeding direction that is easy to operate, the same angle of the handle to the ground, and the appropriate angle of the blade to the ground. It is characterized by the fact that you can select and use the multiple blades on the side edge by simply rotating the handle, making it extremely easy to use.
[15]

The blade plate, which is shaped like a spoon face down, has blades on both sides that are moderately inclined to the horizontal surface and are in contact with it at the same time, so you can scrape the ground in both left and right directions while keeping the blade pressed against the ground.
It is possible to weed twice in a round trip, allowing for efficient weeding work. This weeding tool can remove weeds by using the front and back sides of the blade plate. 40 to 42 show this embodiment, which can be used for a variety of purposes. In the posture shown in Figure 41, the operation of swinging from side to side to scrape the ground and weed with the blades on the side edges,
You can perform weeding operations such as pressing forward and downward to scrape weeds with the blade on the front edge, pushing the blade on the front edge and twisting the handle, and when the blade is turned over, you can perform weeding methods such as concave shaving, turning shaving, and cutting down the ground. It is possible. A blade with a pointed front makes it easier to weed by pressing the front of the blade against the base of the weed and twisting the handle, making it suitable for weeding hard ground or ground mixed with pebbles. The shapes of the left and right edges can also be made asymmetrical.
[16]

By providing the convex-shaped blade, many types of weeding methods using this shaped blade are possible, as described in the description of the weeding tool in Example 1.
[17]

In addition to the shape in which the type 2 bending blade is formed over the entire side edge, it is also possible to bend only a part of the side edge of the flat blade and provide a smaller type 2 bending blade.
The addition of a type 2 bending blade makes it easier to scrape the ground around weeds into a concave shape. When the entire side edge has a type 2 bent blade, several types of weeding methods described in the explanation of Example 7 are possible.
[18]

By shifting the blade plate, the left and right balance of the blade plate can be corrected, making it easier to press the entire area of the blade on the left or right edge against the ground, thereby improving operability. Even in blades whose left and right side edge shapes are greatly different in shape, the weight balance between the left and right sides of the blade plate can be corrected by shifting, so there is an advantage that the degree of freedom in the left and right side edge shapes is widened.
[19]

The handle with a thinner rear part is used in weeding methods where the handle is pressed with the blade turned over to remove weeds.
There is no discomfort when the rear corner of the handle hits the palm of your hand, and the shape of the handle is easy to grip because the rear part of the handle comes into close contact with the palm of your hand, which wraps around the rear of the handle, so there is no slippage, and the operability of weeding by pushing the handle is greatly improved. can be done.
[20]

This claim brings about the following three effects. In the figures of each embodiment, the attachment part of the blade is inclined with respect to the blade plate, and the blade is attached to the lower front surface of the handle parallel to the center line of the handle.
Similar to the shape 32 of the removed portion of the front upper surface of the handle in Fig. 3, a handle with the front lower surface of the handle removed is adopted, and the blade shape is such that the attachment part of the blade body and the blade plate are parallel to each other. Even if it is attached to the front lower surface of the handle, the same effect can be obtained because the blade plate can be tilted with respect to the center line of the handle.
The first effect is that when weeding is done by swinging the weeding implement from side to side to scrape the ground, the weeding operation can be performed with the center line of the handle inclined to the ground, so the height of the rising part of the blade can be reduced. Even with a low weeding tool, interference between the fingers gripping the handle and the ground can be avoided in the weeding postures shown in FIG. 5, FIGS. 8 and 9, in which weeding is performed by gripping the front end of the handle. Since it is possible to grip the handle from a low position close to the ground, the point of effort is closer to the blade plate, and weeding can be done while the blade plate is held down effectively and the blade plate is difficult to wobble. The weeding operation can be done without bending the wrist, which has the advantage of reducing arm fatigue during long hours of work.
The second effect is that in the weeding position shown in Figure 15, in which the blade is turned over and weeded, the leading edge of the blade forms an appropriate angle to the ground, so the length of the blade is relatively short and the blade is easy to use. In the case of blades, in combination with the adoption of a handle with a thinner front part, it is possible to scrape the ground by pressing as described below, and it is possible to press the front end of the blade plate against the base of weeds on hard ground. It is easy to twist the handle.
This weeding method involves flipping the blade over and scraping the weeds off the ground by pressing and scraping. Simply pushing the handle in a straight line presses the blade against the ground and moves the blade at the same time. This is a characteristic feature of the weeding tool of the present invention, which is capable of scraping the ground to a nearly constant depth in which the ground angle and the angle of the front blade of the blade relative to the ground are balanced, and the weeding tool can perform weeding operations approximately 3 times per second. It is really easy to use and allows you to easily scrape away weeds. In Figure 17, the center line of the blade on the front edge of the blade plate and the handle is
A nearly parallel weeding tool is unsuitable for this weeding method because the cutting edge tends to go straight deep into the ground.
The third effect is that in the weeding method of digging up weeds (Figures 20 and 21), the front and back sides of the blade plate are used differently, and the angle of approach of the blade plate into the ground can be selected by keeping the handle at approximately the same angle with respect to the ground. It is possible. Therefore, without changing the angle of the handle to the ground, within the range of the angle of the handle that is easy to operate,
By using the front and back sides of the blade plate, you can select the angle at which the blade plate approaches the ground.

Claims (4)

A rod-shaped rod whose thickness between the top and bottom surfaces of the handle is thinner than the handle thickness (37) over a length of 15 mm or more from the front end of the handle, and the thickness at the front end is 80% or less of the handle thickness (37). A blade body (4) comprising a blade plate (1), a rising part (2), and a mounting part (3) is attached to the front part of the handle, and the blade plate is attached to the front part of the handle. The left and right side edges of the blade plate are flat plates, and when viewed from the front in a position where the projected area of the blade plate onto the horizontal plane is maximized from the light source directly above the blade plate, the front edge of the blade plate is located at the top of the handle. A weeding tool that protrudes forward, the rear end of the blade plate is located below the lower surface of the front end of the handle, and the total length of the blade plate is 150 mm or less, with a straight blade on one side edge of the blade plate and a straight blade on the other side. A weeding tool characterized by having a convex-shaped blade on the side edge. 2. The weeding tool according to claim 1, further comprising a convex blade in place of the linear blade. The weeding tool according to claim 1, wherein the curved blade is provided with a concave arc-shaped blade instead of the linear blade, and the side edge of the concave arc-shaped blade is bent into a shape that protrudes in an arch shape toward the lower surface side. A weeding tool characterized by: 2. The weeding tool according to claim 1, further comprising a twisted blade in the shape of a twisted blade plate in which the blade plate is twisted so that the side edges thereof protrude downward.