Weeding machine

Abstract

To provide a weeding machine that can reduce the weight and vibration of the main body. [Solution] The weeding machine 1 has a main body 20 in which the drive mechanism is housed inside the housing 21, and a weeding blade 10 that vibrates by the drive mechanism is attached to the main body 20. The weeding blade 10 has a blade portion 11 in which a saw-shaped blade 11A is formed, and a main body mounting portion 12 for attaching the blade portion 11 to the main body 20, and a bent portion 11C is formed on at least a part of the blade portion 11 that extends at an angle θ of 20° to 90° with respect to the extending direction of the main body mounting portion 12. In addition, the main body 20 is provided with a support portion 30 whose lower end is in contact with the ground to support the main body 20.

Description

Technical Field

[0001] The present invention relates to a grass cutter in which a driving means is housed inside a main body, and a grass cutting blade vibrated by the driving means is attached thereto.

Background Art

[0002] As has been said since ancient times that farming is a battle against grass, grass cutting is a serious problem. Weeds germinate only from a mere 1 cm between about 0.5 cm and 1.5 cm below the ground surface. Seeds existing above about 0.5 cm below the ground surface cannot withstand sunlight and natural conditions and wither or go dormant, and seeds existing deeper than about 1.5 cm below the ground surface wither or go dormant even if they germinate due to soil pressure because they do not have the power to grow to the ground surface. That is, if the roots of grass within this mere 1 cm are cut, the grass can be knocked down. However, the state of the soil varies, being soft at times and hard at times. When trying to pull out grass in a hard state, if pulled, the grass will break in the middle and the roots will remain in the ground. Even metal cutting tools such as sickles and grass shears cannot cut through hard soil.

[0003] In addition, if an electric grass cutter developed in recent years is used, the grass cutting blade can be finely moved more than 2,000 times per minute, so it is possible to easily enter even hard soil. However, when the grass cutting blade is linearly extended from the main body in which the driving means is housed, when trying to insert the grass cutting blade parallel to the ground at a position 1.5 cm to 2 cm from the ground surface and vibrate it, the main body also has to be put into the soil, and the main body becomes covered with soil, and soil enters the inside of the main body and causes a failure. Therefore, a grass cutter has been developed in which a blade part having a saw-shaped blade and a connecting part for connecting the blade part to the main body are provided on the grass cutting blade, and the blade part is bent with respect to the connecting part so that their extending directions have an angle of 20° or more and 40° or less (for example, see Patent Document 1).

[0004] This design allows the main body to be raised above the ground surface, preventing damage from soil and debris. Furthermore, because the main body is suspended in mid-air, it can be freely moved by hand, allowing the blade to be moved 1.5 to 2 cm below the ground surface to cut grass roots. However, in actual use, the main body contains an electric motor, making it heavy despite its small size. Moreover, it vibrates approximately 2000 times per minute, and suspending the main body in mid-air while moving the blade 1.5 to 2 cm below the ground surface is extremely hard work. Therefore, even with short usage times, it is not good for one's health and could cause tendinitis. Thus, there was a need to alleviate the weight and vibration of the main body. [Prior art documents] [Patent Documents]

[0005] [Patent Document 1] Patent No. 7599604 [Overview of the project] [Problems that the invention aims to solve]

[0006] This invention was made based on these problems, and aims to provide a weeding machine that can alleviate the weight and vibration of the main body. [Means for solving the problem]

[0007] The weeding machine of the present invention has a main body in which the drive mechanism is housed inside the casing, and a weeding blade that vibrates by the drive mechanism is attached to the main body. The weeding blade has a blade portion in which a saw-like blade is formed and a main body mounting portion for attaching the blade portion to the main body. At least a part of the blade portion has a bent portion that extends at an angle of 20° to 90° with respect to the extending direction of the main body mounting portion, and the main body is provided with a support portion whose lower end contacts the ground to support the main body. [Effects of the Invention]

[0008] According to this invention, a support part is provided on the main body, the lower end of which contacts the ground to support the main body. By supporting the main body with the support part, the weight and vibration of the main body can be mitigated. Furthermore, by moving the support part in contact with the ground, the bent part of the blade can be easily moved to a position of about 1.5 cm to 2 cm below the ground surface. Therefore, weeding can be done easily. [Brief explanation of the drawing]

[0009] [Figure 1] This is a diagram showing the configuration of a weeding machine according to the first embodiment of the present invention. [Figure 2] Figure 1 shows the configuration of the weeding blades of the weeding machine. [Figure 3] This is another diagram showing the configuration of the weeding blades of the weeding machine shown in Figure 1. [Figure 4] This is a diagram showing the configuration of a weeding machine according to a second embodiment of the present invention. [Figure 5] This is a diagram showing the configuration of a weeding machine according to a third embodiment of the present invention. [Figure 6] This is a diagram illustrating a modified weeding blade. [Modes for carrying out the invention]

[0010] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0011] (First Embodiment) Figure 1 shows the configuration of a weeding machine 1 according to the first embodiment of the present invention. Figures 2 and 3 show the configuration of the weeding blade 10 of the weeding machine 1, with Figure 2 showing a disassembled view of the configuration from the side and Figure 3 showing a disassembled view of the configuration from above. In this weeding machine 1, a weeding blade 10 that vibrates by the driving means is attached to a main body 20 in which a driving means (not shown) is housed inside a housing 21.

[0012] The drive mechanism includes, for example, a motor that serves as a power source and a conversion mechanism that converts the rotational driving force of the motor into reciprocating driving force in the forward and backward directions. From the front of the housing 21, for example, a blade mounting portion 22 for attaching the weeding blade 10 is provided, protruding in the direction of vibration. At the tip of the blade mounting portion 22, for example, an insertion portion is provided for inserting the main body joint portion 12C of the weeding blade 10, which will be described later. The weeding blade 10 can be attached by inserting the rear end of the main body joint portion 12C and fixing it with a screw 23. The blade mounting portion 22 is connected to the drive mechanism and transmits the driving force of the drive mechanism to the weeding blade 10. From the rear of the housing 21, for example, an electrical cord 24 for supplying power to the drive mechanism is provided. On the upper side of the housing 21, for example, a gripping portion 25 for the operator to hold is provided.

[0013] The weeding blade 10 has, for example, a blade portion 11 with saw-shaped blades 11A formed on both sides, and a body mounting portion 12 for attaching the blade portion 11 to the body portion 20. The blade portion 11 and the body mounting portion 12 are preferably made of a metal material such as iron or stainless steel, because sufficient strength can be obtained.

[0014] The blade portion 11 is preferably flat and rectangular, with the tip having a triangular, pointed shape to facilitate insertion into the soil. The blade portion 11 is preferably flat, with a length of approximately 15 cm to 20 cm, a width of approximately 1 cm to 3 cm, and a thickness of approximately 0.15 cm to 0.3 cm. The length of the pointed portion at the tip of the blade portion 11 is preferably approximately 1 cm to 3 cm. The rear end of the blade portion 11 is provided with a screw hole 11B for fixing the main body mounting portion 12. The saw-like blades 11A are preferably provided on both sides of the long side of the blade portion 11. The saw-like blades 11A are preferably isosceles triangular peaks with a cutting depth of approximately 0.2 cm to 0.4 cm and spacing of approximately 0.2 cm to 0.4 cm.

[0015] The main body mounting section 12 includes, for example, an extension section 12A extending in the direction of vibration, a blade joint section 12B provided at one end of the extension section 12A for joining the blade section 11 to the extension section 12A, and a main body joint section 12C provided at the other end of the extension section 12A for attaching the extension section 12A to the main body section 20. The extension section 12A is preferably formed in the shape of a round bar. This is because when the blade section 11 is inserted into the soil and vibrated, soil, roots, and debris are less likely to adhere to it, and even if they do adhere, they can be easily shaken off. The length of the extension section 12A is preferably about 2 cm to 4 cm. The blade joint section 12B is, for example, formed in the shape of a flat plate so as to abut the blade section 11, and a screw hole 12D is provided corresponding to the screw hole 11B of the blade section 11. The blade section 11 and the blade joint section 12B are fixed together by a screw 12E.

[0016] A bent portion 11C is formed on at least a part of the blade portion 11, extending at an angle θ of 20° to 90° with respect to the extending direction of the main body mounting portion 12. In this embodiment, the entire blade portion 11 is the bent portion 11C. The extending direction of the main body mounting portion 12 is, for example, the extending direction of the extension portion 12A, i.e., the vibration direction of the main body mounting portion 12. With this configuration, the blade portion 11 can be easily moved parallel to the ground surface at a depth of 1.5 cm to 2 cm below the ground surface.

[0017] The main body 20 is provided with a support portion 30 whose lower end contacts the ground to support the main body 20. The support portion 30 is disposed, for example, at the bottom of the main body 20. The support portion 30 has, for example, a holding cover body 31 that covers a part of the main body and supports the main body 20 such that the rear side of the main body 20 is positioned above the front side where the grass cutting blade 10 of the main body 20 is attached when the lower end contacts the ground. By disposing the holding cover body 31 on the main body 20 in this way, the holding cover body 31 can be brought into contact with the ground and slid to move, and the main body 20 can be stably supported. The shape of the support portion 30 may be any shape as long as the lower end can contact the ground to support the main body 20, and it can be arbitrarily designed according to the angle θ between the extending direction of the main body attachment portion 12 of the grass cutting blade 10 and the extending direction of the bent portion 11C. The height of the support portion 30 is preferably set, for example, such that in a state where the support portion 30, specifically the holding cover body 31, contacts the ground to support the main body 20, the blade portion 11 is hidden horizontally in the soil at a position 1.5 cm to 2 cm from the ground surface. This is because by sliding the holding cover body 31 on the ground, the bent portion 11C of the blade portion 11 can be easily moved to a position 1.5 cm to 2 cm below the ground surface from the ground surface.

[0018] The holding cover body 31 is preferably disposed so as to cover the entire bottom of the main body 20, and for example, it is preferably shaped like the lower part of a hollow semi-oval shape. The inside of the holding cover body 31 may remain hollow, but for example, it may be configured to store a battery and be cordless. The material constituting the holding cover body 31 is preferably, for example, a synthetic resin. In particular, a material that does not crack or deform during operation, slides well on the ground surface, is not easily damaged even when it slides, and can further protect the battery or the like stored inside is preferred. For example, materials constituting helmets such as fiber-reinforced plastics and ABS resins are preferably mentioned. It is preferable to provide a flat portion at the bottom of the holding cover body 31 so that the main body 20 can be stably supported.

[0019] This weeding machine 1 is used as follows, for example. The operator drives the main body 20 to vibrate the weeding blade 10, inserts the blade part 11 into the root of the weeds, and makes the holding cover body 31 contact the ground and slide it to move. As a result, the operator can stably hold and move the weeding machine 1, and can easily move the bent part 11C of the blade part 11 at a position 1.5 cm to 2 cm below the ground surface from the ground surface.

[0020] As described above, according to this embodiment, since the support part 30 that supports the main body part 20 with its lower end contacting the ground is disposed at the bottom of the main body part 20, by supporting the main body part 20 with the support part 30, the weight and vibration of the main body part 20 can be alleviated. Further, by making the support part 20 contact the ground and move, the bent part 11C of the blade part 11 can be easily moved at a position about 1.5 cm to 2 cm below the ground surface from the ground surface. Therefore, weeding can be easily performed.

[0021] (Second Embodiment) FIG. 4 shows the configuration of the weeding machine 2 according to the second embodiment of the present invention. This weeding machine 2 has the same configuration as that of the first embodiment except that the configuration of the support part 30 is different. Therefore, the same reference numerals are given to the same or corresponding components as those in the first embodiment, and the detailed description thereof is omitted.

[0022] The support part 30 has, for example, instead of the holding cover body 31 described in the first embodiment, a support column 32 that supports the rear side of the main body part 20 so that the rear side is positioned above the front side where the weeding blade 10 of the main body part 20 is attached, and a tray 33 provided at the lower end of the support column 32 and contacting the ground. The height of the support part 30 is preferably set such that, for example, in a state where the support part 30, specifically the tray 33, contacts the ground and the main body part 20 is positioned thereon, the blade part 11 is horizontally hidden in the soil at a position 1.5 cm to 2 cm from the ground surface.

[0023] The support post 32 can be made of, for example, a metal rod-shaped member, and may be fixed by screwing the threaded portion at the tip of the support post 32 into a threaded hole formed in the bottom of the main body 20. In this weeding machine 2, the support post 32 may be moved by holding it rather than the gripping portion 25 provided on the main body 20. For this reason, the support post 32 may be finished with a material that feels good to the touch, rather than being left as bare metal. The receiving tray 33 is, for example, to prevent the support post 32 from sinking into the ground due to pressure from the main body 20. The receiving tray 33 is preferably a circular flat plate with a diameter of about 6 cm to 8 cm. The receiving tray 33 may be attached to the support post 32 by welding, screws, etc. The receiving tray 33 may be made of, for example, metal, or synthetic resin.

[0024] According to this embodiment, even if the support portion 30 is configured as described above, it can be used in the same way as in the first embodiment, and the same effects can be obtained.

[0025] (Third embodiment) Figure 5 shows the configuration of a weeding machine 3 according to a third embodiment of the present invention. This weeding machine 3 has the same configuration as the first embodiment, except that the configuration of the support part 30 is different. Therefore, the same reference numerals are used for components that are the same as or corresponding to those in the first embodiment, and their detailed descriptions are omitted.

[0026] The support section 30, for example, instead of the retaining cover body 31 described in the first embodiment, has casters 34 provided on the rear side of the main body 20 such that the rear side of the main body 20 is positioned above the front side of the main body 20 to which the weeding blade 10 is attached. The casters 34 are provided, for example, on the rear bottom of the main body 20, and there may be multiple casters. The height of the support section 30 is preferably set to such a height that, for example, when the support section 30, specifically the casters 34, is in contact with the ground and the main body 20 is positioned on it, the blade 11 is horizontally hidden in the soil at a position 1.5 cm to 2 cm above the ground surface. Any type of caster 34 may be used. It is preferable that the casters 34 be configured so that the center line of the caster rotation axis and the center point of the rotating part of the wheel are in a straight line. This is because if they are not in a straight line, direction correction will be necessary each time force is applied to the work.

[0027] According to this embodiment, even if the support portion 30 is configured as described above, it can be used in the same way as in the first embodiment, and the same effects can be obtained.

[0028] (modified version) Figure 6 shows a modified example of the weeding blade 10. In the embodiments described above, the case in which the entire blade portion 11 of the weeding blade 10 is a bent portion 11C was explained, but the bent portion 11C may be formed on only a part of the blade portion 11. In the following description, the same reference numerals are used to denote components that are the same as or corresponding to those in the first embodiment.

[0029] The weeding blade 10 has, for example, a blade portion 11 with saw-shaped blades 11A formed on both sides, and a body mounting portion 12 for attaching the blade portion 11 to the body portion 20, similar to the first embodiment. The blade portion 11 has, for example, a bent portion 11C that extends in one direction and has saw-shaped blades 11A formed on both sides, and an insertion portion 11D provided between the bent portion 11C and the body mounting portion 12 and having saw-shaped blades 11A formed on both sides. The configuration of the bent portion 11C is the same as the bent portion 11C described in the first embodiment. The insertion portion 11D is, for example, provided bent at an angle θ of 20° to 90° on the upper surface side of the bent portion 11C from the direction in which the bent portion 11C extends. The body mounting portion 12 is, for example, flat and is provided on the opposite side of the insertion portion 11D from the bent portion 11C, extending in the same direction as the insertion portion 11D. The main body mounting portion 12 is provided with a screw hole 12D for fixing to the blade mounting portion 22 of the main body portion 20 with a screw 23. That is, the bent portion 11C extends at an angle θ of 20° to 90° with respect to the extending direction of the main body mounting portion 12. The extending direction of the main body mounting portion 12 is, for example, the vibration direction of the main body mounting portion 12.

[0030] The present invention has been described above with reference to embodiments, but the present invention is not limited to the above embodiments and can be modified in various ways. For example, although each component was described in detail in the above embodiments, it is not necessary to have all components, and other components may be included. Furthermore, the specific details of each component may differ. [Explanation of Symbols]

[0031] 1,2,3...Weeding machine, 10...Weeding blade, 11...Blade section, 11A...Sawtooth blade, 11B...Screw hole, 11C...Bend section, 11D...Insertion section, 12...Main body mounting section, 12A...Extension section, 12B...Blade joint section, 12C...Main body joint section, 12D...Screw hole, 12E...Screw, 20...Main body section, 21...Housing, 22...Blade mounting section, 23...Screw, 24...Electrical cord, 25...Grip section, 30...Support section, 31...Holding cover, 32...Support column, 33...Receiving tray, 34...Caster

Claims

1. A weeding machine having a main body in which a drive mechanism is housed inside the casing, and a weeding blade that vibrates by the drive mechanism attached to the main body, The weeding blade has a blade portion on which a saw-shaped blade is formed, and a body mounting portion for attaching the blade portion to the body portion, and at least a part of the blade portion has a bent portion that extends at an angle of 20° to 90° with respect to the extending direction of the body mounting portion. The main body is provided with a support portion whose lower end is in contact with the ground to support the main body. A weeding machine characterized by the following features.

2. The weeding machine according to claim 1, characterized in that the support portion has a holding cover body that covers a part of the main body and whose lower end is in contact with the ground, so that the rear side of the main body is positioned above the front side of the main body to which the weeding blade is attached.

3. The weeding machine according to claim 1, characterized in that the support part includes a support column that supports the rear side of the main body such that the rear side of the main body is positioned above the front side of the main body to which the weeding blade is attached, and a receiving tray provided at the lower end of the support column that contacts the ground.

4. The weeding machine according to claim 1, characterized in that the support part has a caster provided on the rear side of the main body such that the rear side of the main body is positioned above the front side of the main body to which the weeding blade is attached.

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