Weeder

Abstract

To provide a weeder capable of properly burying weeds in soil and withering the weeded weeds.SOLUTION: This weeder 1 for weeding weeds on the ground surface or in the ground is equipped with a slender handle part 2 and a V-shaped wire material 3 attached to one end side of the handle part 2 and expanded at a prescribed angle around the handle part 2. Weeding is carried out by horizontally moving the wire rods 3 in the ground in a state in which the expanded side of the wire rods 3 is horizontally directed to the rear side in the advancing direction.SELECTED DRAWING: Figure 1A

Description

[Technical Field]

[0001] The present invention relates to a herbicide for controlling weeds growing on or below ground in fields of leafy vegetables planted at close intervals, such as 15 cm between rows. [Background technology]

[0002] A known technology for this type of weeder is described in Patent Document 1. Patent Document 1 describes a weeder as follows: "The weeding blade body 1 is formed into a roughly triangular frame body with flat steel blade 3 having arcuate corners on both sides of one side and steel wires continuing to both ends of the flat steel blade 3, which is concavely curved and inclined diagonally downward toward the inside of the frame body. The flat steel blade 3 is formed with an inner cutting edge 4 and an outer cutting edge 5, and both sides of the frame body are successively formed with an outward bulge 6 that moves the crop outward from the outside of the flat steel blade and a diagonally upward concave portion 7 that gives the handle 2 an appropriate handle angle. A handle attachment piece 9 protrudes diagonally upward from the apex 8 of the triangle of the frame body. The handle 2 is provided with a handle attachment piece connecting part 10 on its front end surface, to which the handle attachment piece 9 is attached, and the weeding blade body 1 protrudes from the front end surface of the handle 2 to form a weeder."

[0003] The weeding tool described in Patent Document 1 is configured to "enable weeding without damaging stems, leaves, roots, etc., even when brought close to crops." [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Publication No. 7-24001 Summary of the Invention [Problem to be solved by the invention]

[0005] Weeds have a negative impact on crop growth and interfere with harvesting, so proper weeding is essential in agricultural production. Physical weeding methods include cutting, pulling out, and burying the weeds in the soil.

[0006] However, the weeder described in Patent Document 1 is designed to cut weeds from the roots by holding the handle 2 with both hands and cutting the flat steel blades 3, 14 diagonally downward into the ground, cutting the soil below the surface. It is designed to "cut" and "pull out" weeds, but not to "bury" them in the soil. Furthermore, its shape is unsuitable for weeding in narrow spaces, such as 15 cm between rows of leafy vegetables.

[0007] The present invention seeks to develop a weeding method that differs from the above-mentioned weeding tools, and aims to provide a weeding tool that is suitable for "burying" weeds that grow on or underground in fields of leafy vegetables grown with narrow row spacing, such as 15 cm between rows. [Means for solving the problem]

[0008] The weeding tool of the present invention is a weeding tool for removing weeds on the surface or underground, and is characterized by comprising an elongated handle and an elastically deformable V-shaped wire attached to one end of the handle and expanded at a predetermined angle around the handle, and is configured to remove weeds by moving the wire horizontally underground with the expanded side of the wire facing horizontally backward in the direction of travel. [Effects of the Invention]

[0009] The weed killer according to the present invention can properly bury weeds in the soil, preferably kill the weeds, or at least suppress the growth of the weeds. [Brief explanation of the drawings]

[0010] [Figure 1A] 1 is a perspective view showing a weeding tool according to a first embodiment of the present invention. [Figure 1B] FIG. 2 is a left side view showing the weeding tool. [Figure 1C] FIG. [Figure 2] FIG. 2 is an explanatory diagram showing the weeding tool in use. [Figure 3]FIG. 2 is an explanatory diagram showing the weeding tool in use. [Figure 4A] FIG. 10 is a perspective view showing a weeder according to a second embodiment of the present invention. [Figure 4B] FIG. 2 is a left side view showing the weeding tool. [Figure 4C] FIG. 2 is a perspective view showing a part of the weeding tool. [Figure 4D] FIG. 2 is a left side view showing a part of the weeding tool. [Figure 5A] FIG. 10 is a perspective view showing a weeder according to a third embodiment of the present invention. [Figure 5B] FIG. 2 is a left side view showing the weeding tool. [Figure 5C] FIG. 2 is a perspective view showing a part of the weeding tool. [Figure 5D] FIG. 2 is a left side view showing a part of the weeding tool. [Figure 6A] FIG. 10 is a perspective view showing a weeder according to a fourth embodiment of the present invention. [Figure 6B] FIG. 2 is a left side view showing the weeding tool. [Figure 7A] FIG. 10 is a perspective view showing a weeder according to a fifth embodiment of the present invention. [Figure 7B] FIG. 2 is a left side view showing the weeding tool. [Figure 7C] FIG. 2 is a perspective view showing a part of the weeding tool. [Figure 7D] FIG. 2 is a left side view showing a part of the weeding tool. [Figure 8A] FIG. 10 is a perspective view showing a weeder according to a sixth embodiment of the present invention. [Figure 8B] FIG. 2 is a left side view showing the weeding tool. [Figure 9A] FIG. 10 is a perspective view showing a weeder according to a seventh embodiment of the present invention. [Figure 9B] FIG. 2 is a left side view showing the weeding tool. [Figure 10A] FIG. 13 is a perspective view showing a weeder according to an eighth embodiment of the present invention. [Figure 10B] FIG. 2 is a left side view showing the weeding tool. [Figure 10C] FIG. [Figure 11A] FIG. 13 is a perspective view showing a weeder according to a ninth embodiment of the present invention. [Figure 11B] FIG. 2 is a left side view showing the weeding tool. [Figure 11C] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0011] A first embodiment of the present invention will be described below with reference to the drawings.

[0012] <Overall structure> A weeding tool 1 according to a first embodiment of the present invention is a weeding tool suitable for "burying" weeds growing on or underground in fields of leafy vegetables grown at close row spacings, such as 15 cm apart, and is equipped with a long, slender handle 2, as shown in Figures 1A to 1C. The handle 2 is a support material made of, for example, a long, slender, flat plate or rod, and one end, or lower end, of the handle 2 is formed into a tapered, triangular tip 2a. An elastic wire 3 made of, for example, wire is attached to the tip 2a of the handle 2 by welding or the like at its longitudinal center.

[0013] The wire 3 is made of an elastically deformable and bendable steel material or the like. The longitudinal center of the wire 3 is fixed to the tip 2a of the handle 2, and both base ends 3a protruding from both sides of the tip 2a are bent toward one side (rear side) in the width direction of the handle 2. The two ends of the bent wire 3 on the tip side of the base end 3a form a pair of weeding pieces 3c, 3d. Each of the pair of weeding pieces 3c, 3d is linear and V-shaped, opening at a predetermined angle, for example, 60°. In other words, the pair of weeding pieces 3c, 3d are attached so that each of them is inclined toward the rear of the handle 2, for example, at an angle of 30°, with the width direction of the handle 2 as the reference (center).

[0014] Furthermore, at the other longitudinal end, or upper end, of the handle 2, there are provided a plurality of, for example, two, screw insertion holes 2b penetrating in the thickness direction of the handle 2, spaced apart in the longitudinal direction of the handle 2. These screw insertion holes 2b are provided for fixing a thin, rod-shaped handle (not shown) or the like to the upper end side of the handle 2.

[0015] <How to use> Next, weeding work (method of use) using the weeding tool 1 configured as described above will be described with reference to FIGS.

[0016] First, the condition of weeds growing between rows (approximately 15 cm) of a crop C of leafy vegetables such as spinach growing in the field (field) to be worked on is checked. Next, a space between rows where weeds P that have just germinated and are in a relatively small growth stage are growing is found, and to remove the weeds P growing between the rows, in other words, to weed them, the operator grasps the handle 2 of the weed cutter 1 and inserts the lower end of the handle 2 of the weed cutter 1 into the space between the rows in the field with each of the pair of weed cutting blades 3c, 3d of the weed cutter 1 facing backward, as shown in Figures 2 and 3.

[0017] In this state, the handle 2 is grasped and moved horizontally, with the front of the handle 2 in the lead, as if dragging it, so that each of the weeding blades 3c, 3d advances while burrowing into the ground. At this time, as the handle 2 advances underground, each of the pair of weeding blades 3c, 3d also advances, and because these pair of weeding blades 3c, 3d are spread apart in a V shape, the soil on the surface of the field is pushed into a flat surface around the handle 2 as the pair of weeding blades 3c, 3d advance and breaks down.

[0018] At the same time, relatively small underground weeds P that have just germinated or are about to germinate on the surface and are growing between the rows have their leaves and roots entangled in the pair of weed-killing pieces 3c, 3d and are dragged into the ground and buried.

[0019] At this time, because the pair of weeding pieces 3c, 3d have a V-shaped inclined structure, the weeds P entangled in one of the weeding pieces 3c, 3d gradually move from a position near the base end 3a to the tip of each weeding piece 3c, 3d as the weeding pieces 3c, 3d continue to move horizontally underground, and are then released from the tip of the weeding piece 3c, 3d into the ground and buried.

[0020] Furthermore, if either of the weeding pieces 3c, 3d comes into contact with the area near the base of the crop C during the weeding operation, the repulsive force received from the area near the base of the crop C causes the weeding pieces 3c, 3d to elastically deform so as to escape, thereby suppressing damage to the area near the base of the crop C.

[0021] Furthermore, when weeding by inserting each of the weeding blades 3c, 3d of the weeding tool 1 into the ground between the rows of crop C and moving it horizontally through the soil, as shown in Figure 3, the handle 2 of the weeding tool 1 moves along the center of the inter-row space of crop C. Therefore, even when weeding between the rows of leafy vegetables such as spinach that have grown large, the weeding blades 3c, 3d do not come into contact with the leaves of the leafy vegetables, and the handle 2 is unlikely to come into contact with them either, so there is very little chance that the leaves of the leafy vegetables will be damaged.

[0022] <Action and effect> As described above, the weeding tool 1 according to the first embodiment is configured such that the wire 3 having a pair of V-shaped weeding blades 3c, 3d is attached to the lower end of the handle 2. Therefore, as shown in FIG. 2 , the lower end of the handle 2 is inserted between rows of weeds in the field to be worked on, and the pair of weeding blades 3c, 3d are advanced horizontally backward in the ground, causing the pair of weeding blades 3c, 3d to move horizontally in the ground with their V-shaped openings. As a result, relatively small weeds P that have just germinated or are about to germinate from the ground can be entangled in the pair of weeding blades 3c, 3d and buried in the ground. The weeds P buried in the ground will later die and be decomposed by microorganisms.

[0023] Therefore, by using the above-mentioned weeding tool 1, weeds can be properly buried in the soil, preferably killed, or at least their growth can be suppressed, making inter-row weeding easy. This reduces the risk of poor inter-row ventilation caused by the growth of weeds P, affecting the growth of crops C, or causing disease, allowing crops C grown in the field to grow (cultivate) appropriately.

[0024] Furthermore, because the pair of weeding pieces 3c, 3d have a V-shaped inclined structure, when these weeding pieces 3c, 3d move horizontally underground, the weeds P entangled in one of the weeding pieces 3c, 3d gradually move from a position near the base end 3a to the tip of each weeding piece 3c, 3d, and are gradually released (released) into the ground from the tip of each weeding piece 3c, 3d and buried. This makes it possible to effectively prevent entanglement and accumulation of entangled weeds P in the weeding pieces 3c, 3d with a simple structure.

[0025] Furthermore, when the pair of weeding pieces 3c, 3d are moved horizontally underground with the handle 2 at the front, as long as the straightness of this movement is ensured, the pair of weeding pieces 3c, 3d will not move horizontally (sideways), and the pair of weeding pieces 3c, 3d will not open towards the crop C.

[0026] In other words, because the pair of weeding pieces 3c, 3d are configured in a V-shape using the elastic wire 3, when the pair of weeding pieces 3c, 3d are inserted into the ground and moved horizontally to perform weeding, even if one of the weeding pieces 3c, 3d comes into contact with the vicinity of the base of the crop C, the weeding piece 3c, 3d is elastically deformed so as to be pushed away by the repulsive force that the weeding piece 3c, 3d receives from the vicinity of the base of the crop C. Therefore, even if the weeding pieces 3c, 3d come into contact with the vicinity of the base of the crop C during weeding, the vicinity of the base of the crop C is unlikely to be damaged, and damage to the crop C can be suppressed (minimized). This allows weeding to be performed right up to the vicinity of the base of the crop C, making it possible to perform more appropriate weeding easily and effectively.

[0027] The opening angle (degree) of the pair of weeding blades 3c, 3d is adjustable, so that the opening angle of the pair of weeding blades 3c, 3d can be adjusted to match the spacing between the rows of the crop C to be weeded or the growth conditions of the crop C, thereby enabling appropriate and easy weeding between the rows of the crop C. Furthermore, at least one of the pair of weeding blades 3c, 3d can be bent or curved as needed to fit, for example, the shape of a field, thereby widening or narrowing the distance between the pair of weeding blades 3c, 3d and adjusting the attachment angle of the weeding blades 3c, 3d. Specifically, when weeding a sloped portion of a ridge, the weeding blade 3c, 3d on the sloped side can be bent downward to match the slope angle and shape of the ridge, allowing the pair of weeding blades 3c, 3d to entangle and weed the weeds P even in special locations such as sloped ridges.

[0028] <Other> It should be noted that the present invention is not limited to the above-described embodiment, and includes various modifications. For example, the above-described embodiment has been described to clearly explain the present invention, and the present invention is not necessarily limited to an embodiment having all of the described configurations.

[0029] In particular, by appropriately changing the size (thickness, length, etc.) of each weeding piece 3c, 3d of the weeding tool 1, it is possible to configure the tool to be able to weed in areas other than the typical row spacing of about 15 cm for spinach, such as narrower row spacing, wider row spacing, or furrow spacing (about 30 cm).

[0030] Furthermore, as in the weeding tool 1A according to the second embodiment shown in Figures 4A to 4D, the angle θ between the wire 3 and the handle 2 at the tip 2a of the elongated, flat handle 2, which is longer in the longitudinal direction, can be set to, for example, 110° or 140° in a horizontal side view, so that the handle 2 can be held at an optimal angle for effective weeding. A elongated, rod-shaped handle 5 is attached concentrically to the upper end of the handle 2. A notch 5c is provided at the lower end of the handle 5, extending from the lower end surface along the axial direction.

[0031] The notch 5c has a width substantially equal to the thickness of the handle 2 so that the upper end of the handle 2 can be inserted therein. The lower end of the handle 5 is provided with a threaded hole (not shown) that penetrates the width of the notch 5c. These threaded holes are provided at positions that communicate with the screw insertion holes 2b of the handle 2 when the upper end of the handle 2 is inserted horizontally from the lower end of the handle 5 into the notch 5c of the handle 5. As shown in FIGS. 4A and 4B , the upper end of the handle 2 is inserted into the notch 5c of the handle 5, the threaded portions of the bolts 5a are inserted into the threaded holes, and the weed cutter 1 is fixed to the lower end of the handle 5 by fastening the weed cutter 1 to the lower end of the handle 5. The handle 5 may be made of, for example, a wooden or metal pipe.

[0032] Furthermore, as in the weeding tool 1B according to a third embodiment shown in Figures 5A to 5D, a configuration can be adopted in which a plurality of, for example, six screw insertion holes 2b are provided at equal intervals in the longitudinal direction on the upper ends of a plurality of, for example, three handles 2 (2A, 2B, 2C), and a plurality of, for example, three weeding tools 1 are arranged in series in the front-to-rear direction. In this case, the handles 2 are connected at equal intervals by a horizontally installed, elongated, flat connecting plate 6. This connecting plate 6 is provided with a plurality of, for example, two screw insertion holes 6a at intervals in the up-down direction at both longitudinal ends and the center. The widthwise spacing of these screw insertion holes 6a is set equal to the longitudinal spacing of the screw insertion holes 2b provided in each handle 2.

[0033] Of these handles 2, handle 2A, which is attached to one longitudinal end (front end) of connecting plate 6, is attached so as to protrude the most upward. Another handle 2B is attached to the longitudinal center of connecting plate 6, with one screw insertion hole 2b shifted downward from handle 2A. Another handle 2C is attached to the other longitudinal end (rear end) of connecting plate 6, with one screw insertion hole 2b shifted downward from handle 2B. In short, these three handles 2 (2A, 2B, 2C) are attached to connecting plate 6 with the height positions of the wires 3 fixed to these handles 2 changed in stages so that they protrude more downward from the front end to the rear end with respect to connecting plate 6.

[0034] In other words, the handle 2A attached to the front end of the connecting plate 6 is longer in the longitudinal direction than the other handles 2B and 2C, and the upper end of this handle 2A is also provided with screw insertion holes 2b spaced apart in the longitudinal direction. These screw insertion holes 2b are provided for attaching the handle 5 to the upper end of the handle 2A. In other words, the handle 2A is fixed to the lower end of the handle 5 by inserting the upper end of the handle 2A into the notched portion 5c of the handle 5 and fastening it with a bolt 5a and a nut (not shown). Thus, this weeder 1B is configured such that multiple (e.g., three) wires 3 are attached to the connecting plate 6 at different height positions in stages, making it possible to weed a variety of weeds located at different depths in the soil, thereby making weeding more effective and easier.

[0035] As in the weeding tool 1C according to the fourth embodiment shown in Figures 6A and 6B, a configuration in which a plurality of weeding tools 1B shown in Figures 5A and 5B are connected in rows, for example, three rows, to match the row spacing in the field to be weeded. In this case, a connecting hole 6b is provided through the thickness of each of a plurality of connecting plates 6, for example, three, between a screw insertion hole 6a provided at one longitudinal end of each of the connecting plates 6 and a screw insertion hole 6a provided at the longitudinal center of each of the connecting plates 6. Another connecting hole 6b is also provided between a screw insertion hole 6a provided at the other longitudinal end of each of the connecting plates 6 and a screw insertion hole 6b provided at the longitudinal center of each of the connecting plates 6.

[0036] These multiple (e.g., three) connecting plates 6 are arranged in parallel to match the spacing between rows in the field to be weeded, and in this state, connecting rods 7, which serve as elongated connecting members, are inserted into connecting holes 6b provided in the connecting plates 6 and fixed by bolts or the like. As a result, the weeder 1C is configured so that each handle 2 is attached in parallel to match the spacing between rows. Furthermore, a handle 5 is attached to the upper end of the handle at the front end of the connecting plate 6 attached at the center in the width direction of the connecting plates 6 connected by the connecting rods 7. Therefore, this weeder 1C can weed multiple (e.g., three) rows of rows at once by aligning each handle 2 with the center of the row spacing, inserting each wire 3 into the ground, and gripping the handle 5 to perform weeding, thereby making weeding between rows more effective and easier.

[0037] Furthermore, since the connecting rods 7 are fixed to each connecting plate 6 by bolting, the spacing between the connecting plates 6 can be changed to match the spacing between the rows to be weeded by changing the position of the bolts.

[0038] Furthermore, as shown in a fifth embodiment in Figures 7A to 7D, a weeding device 11 can be formed by attaching a plurality of weeders 1D, for example, seven weeders 1D, lined up in the width direction. This weeding device 11 is a weeding device for a weeding implement (a working device for an agricultural implement) to be attached to an agricultural implement (not shown), such as a cultivator or a tractor. This weeding device 11 has a first shaft 12 installed with its longitudinal direction aligned with the width direction of the agricultural implement, that is, the left-right direction (width direction), and a second shaft 13 installed in front of and parallel to the first shaft 12. Here, the first shaft 12 and the second shaft 13 are each made of a rectangular pipe with a square cross section.

[0039] Furthermore, rectangular pillar-shaped support members 14 that protrude forward of the first shaft 12 are attached to both longitudinal ends of the first shaft 12. Cylindrical screw members 15 that serve as lift bolts are threadedly fixed to the tips of the support members 14, penetrating vertically and rotatably. Thread grooves are formed on the circumferential surfaces of the screw members 15. Furthermore, adjustment levers 16 that rotate the screw members in the circumferential direction are attached to the upper ends of the screw members 15, respectively.

[0040] Furthermore, through-holes (not shown) penetrating vertically are provided at both longitudinal ends of the second shaft 13. Annular connecting members 17 with square cross sections are attached to both longitudinal ends of the second shaft 13. These connecting members 17 also have insertion holes (not shown) penetrating vertically, and nut bodies 18 are fixed by welding or the like, communicating with the upper insertion holes of the connecting members 17. The lower ends of the threaded members 15 are screwed to the nut bodies 18, penetrate the connecting members 17 and the second shaft 13, and protrude downward from the lower through-holes of the second shaft 13. Therefore, by rotating the threaded members 15 by rotating the adjustment levers 16, the threaded members 15 rotate relative to the nut bodies 18, thereby vertically raising and lowering the second shaft 13 relative to the first shaft 12.

[0041] Additionally, multiple (e.g., seven) rectangular cylindrical holders 21 with square cross sections are attached to the second shaft 13, inserted longitudinally at predetermined intervals, e.g., the spacing between rows in the target field, allowing for lateral movement. A mounting member 22 having a vertically extending mounting hole 22a is attached to the front of each holder 21. A bolt 23 is screwed to the front of each mounting member 22. Each mounting member 22 is attached with a flat elastic connecting plate 24 that can bend (elastically deform) only in the thickness direction. The elastic connecting plates 24 are inserted into the mounting holes 22a of the mounting members 22, and the bolts 23 are screwed to the mounting members 22, thereby fixing the vertical mounting positions of the elastic connecting plates 24, i.e., the cantilever lengths of the elastic connecting plates 24. Therefore, these elastic connecting plates 24 extend vertically downward like cantilevers with the second shaft 13 as a fixed end, and are attached so that these elastic connecting plates 24 curve only in the front-to-rear direction. Furthermore, a fixing nut 25 is fixed to the rear side of each mounting member 22 by welding or the like, and a fixing bolt (not shown) is screwed into this fixing nut 25. By tightening these fixing bolts into the fixing nuts 25, the mounting position of each mounting member 22 relative to the second shaft 13 in the width direction is fixed.

[0042] A weed cutter 1D is attached to the lower end, or free end, of each elastic connecting plate 24. The tips of the V-shaped wires 3 of these weed cutters 1D are facing forward, and one longitudinal end of a thin, flat connecting member 4 is connected to the upper end of the handle 2 of each weed cutter 1D, perpendicular to the width direction, and is attached, for example, by welding. The other longitudinal end of the connecting member 4 is provided with a plurality of, for example, two, screw insertion holes 4a. The screw insertion holes 4a of the connecting member 4 of each weed cutter 1D are connected to screw insertion holes 24a spaced apart in the vertical direction at the lower end of each elastic connecting plate 24, and these connected screw insertion holes 4a, 24a are fastened with bolts or the like. Each elastic connecting plate 24 is made of a flexible, elongated plate material such as stainless steel or fiber-reinforced plastic (FRP). The weeding tool 1D attached to the lower end of the elastic connecting plate 24 can have its attachment position adjusted according to the soil conditions of the field to be worked on, the type of crop planted, and the like.

[0043] Furthermore, as in a weeding device 11A according to a sixth embodiment shown in Figures 8A and 8B, a third shaft 19 is attached to the first shaft 12 so that it can be raised and lowered, and a weed cutter 1D can be attached to the lower end of multiple elastic connecting plates 24 attached at intervals to the third shaft 19. Here, the third shaft 19 is attached to the rear of the first shaft 12 and, like the second shaft 13, is attached to the first shaft 12 via a support member 14, a screw member 15, and a connecting member 17. An adjustment lever 16 is attached to the upper end of each screw member 15. Here, these support members 14, screw members 15, adjustment levers 16, and connecting members 17 have the same configuration as the support member 14, screw member 15, adjustment lever 16, and connecting member 17 that support the second shaft 13, and therefore a description thereof will be omitted.

[0044] A holder 21, an attachment member 22, and an elastic connecting plate 24 are attached to the third shaft 19. These holders 21, attachment member 22, and elastic connecting plate 24 are similar in configuration to the holders 21, attachment member 22, and elastic connecting plate 24 attached to the second shaft 13, and therefore will not be described here. A weeding tool 1D is also attached to the lower end of each of these elastic connecting plates 24. As shown in FIG. 8B , the weeding tool 1D attached to the third shaft 19 has a longer cantilever length than the weeding tool 1D attached to the second shaft 13, and is therefore fixed in a state where it protrudes further downward. As a result, weeding can be performed using the weeding tools 1D attached to the second shaft 13 and the third shaft 19, making it possible to remove various weeds at different depths in the soil, thereby making weeding more effective and easier.

[0045] Furthermore, as in the weeding device 11B according to the seventh embodiment shown in Figures 9A and 9B, the weeding tool 1D attached to the second shaft 13 located at the front side can be replaced with a furrow-cutting tool (weeding tool) 31 capable of loosening compacted soil. These tools 31 are attached by orthogonally attaching a connecting member 4 to the upper end of a long, narrow, flat furrow-cutting plate 31a, the width of which faces the front-rear direction. The screw insertion holes 4a of the connecting member 4 communicate with the screw insertion holes 24a of the elastic connecting plate 24, and are secured with bolts or the like. Thus, these tools 31 are also configured to be raised and lowered by rotating the adjustment lever 16 to rotate the screw member 15 and raise and lower the second shaft 13 in the vertical direction.

[0046] Alternatively, as in the weed cutter 1E according to the eighth embodiment shown in Figures 10A to 10C, the weed cutter 1E may have a curved, arc-shaped handle 41, V-shaped blades 42 protruding in the left-right direction from the lower end of the handle 41, and weed cutting blades 3c, 3d attached to the respective base ends of the V-shaped blades 42. Specifically, the handle 41 of this weed cutter 1E has a curved, arc-shaped handle 41 extending rearward, and a sickle-shaped blade 41a is formed at the front end of the handle 41. Furthermore, a sickle-shaped blade 42a is also formed at the front end of the V-shaped blade 42. The tips of the weed cutting blades 3c, 3d are each curved rearward.

[0047] As a result, by burying this weeding tool 1E in the ground in the center of a furrow in a field where a mulch sheet has been laid and moving it horizontally forward, weeds can be removed by cutting through the compacted ground in the center of the furrow with blade portions 41a, 42a, and weeding can be done with weeding pieces 3c, 3d in the soft, uncompacted ground at both ends of the furrow near the mulch sheet. Also, because the tips of weeding pieces 3c, 3d are curved backward, even when weeding is done by bringing weeding pieces 3c, 3d of wire 3 up close to the edge of the mulch sheet, the tips of weeding pieces 3c, 3d will not get caught on the mulch sheet and cause damage, so weeding can be done up to the edge of the mulch sheet.

[0048] 11A to 11C, a weeder 1F according to a ninth embodiment may have a cylindrical handle 51, a V-shaped, flat blade 52 attached horizontally to the lower end of the handle 51, and weeding blades 3c and 3d attached to the tips of both sides of the blade 52. Specifically, a blade 52a is formed on the surface of the V-shaped tip of the blade 52 of this weeder 1F, and weeding blades 3c and 3d are attached to the rear ends of the V-shaped blade 52, with the tips of each weeding blade 3c and 3d curved backward. Thus, by burying this weeder 1F in the ground in the center of a furrow in a field where a mulch sheet has been laid and moving it horizontally forward, it is possible to weed the furrows from the center to the very edge of the mulch sheet, just like the weeder 1E. [Explanation of symbols]

[0049] 1,1A,1B,1C,1D,1E,1F Weeding tools 2,2A,2B,2C Handle 2a Insertion hole 2b Screw insertion hole 3 wire rod 3a Proximal end 3c,3d Weeding piece part 4 Connecting members 4a Screw insertion hole 5 Handle 5a bolt 5b Nut 5c Notch 6 Connecting plate 6a Screw insertion hole 6b Connection hole 7 Connecting rod 11,11A,11B Weeding device (weeding tool) 12 First Shaft 13 Second shaft 14 Support member 15 Screw material 16 Adjustment lever 17 Connecting member 18 Nut body 19 Third Shaft 21 Holding body 22 Mounting material 22a mounting hole 23 volts 24 Elastic connecting plate 24a Screw insertion hole 25 Fixing nut 31 Work tools (weeding tools) 31a Grooving plate 41 Handle 41a Blade part 42 Blade part 42a Blade part 51 Handle 52 Blade part 52a Blade part C crops P weeds θ angle

Claims

1. A herbicide for removing weeds on the ground or underground, A slender handle portion, an elastically deformable V-shaped wire attached to one end of the handle and expanding at a predetermined angle around the handle, The wire is moved horizontally underground with the expanded side of the wire facing horizontally backward in the direction of travel to remove weeds. A weeding tool characterized by:

2. The wire is attached perpendicular to the longitudinal direction of the handle.

2. The weeding tool according to claim 1.

3. At least the tip of the wire is elastic.

2. The weeding tool according to claim 1.

4. The wire is configured to be bendable.

2. The weeding tool according to claim 1.

Images