JP2004267170A - Weeder for space around root of crop plant to be attached to cultivator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a weeder that can mechanically cut off the weeds on the spaces between crop roots and the space around the roots of crop plants in high efficiency without damage to the crop plants. <P>SOLUTION: In order to kill the weeds on the spaces Da around the roots of crop plants, while a cultivator moves on the spaces K between levees of the crop plant D, this weeder A<SB>1</SB>for cutting the spaces around crop roots is attached to the back face of the outermost intertillage nail N<SB>2</SB>so that it may turn back side among a plurality of intertillage nails N<SB>1</SB>, N<SB>2</SB>, N<SB>3</SB>set to the cultivator B. This weeder A<SB>1</SB>for cutting the spaces around crop roots is further equipped with a horizontal weeding blade 39 having prescribed sweepback angle (θ) and rake angle (α) and arranged in the cantilever style on the further outside of the outside intertillage nail N<SB>2</SB>on the upper site of the action part in the soil by the outer intertillage nail N<SB>2</SB>, with a supporting plate 40 arranged almost horizontally toward the backside on the upper site and with the elastic spring weeders 42, 43 arranged so that they may cut the weeds in the space Da around the crop plant. These elastic spring weeders 42, 43 are fixed to the support plate 40 in the cantilever style form and the length of the cantilever is defined so that it may extend to more outerside with a prescribed sweepback angle (θ) and a top of the lever is arranged more outside than the top of the horizontal blade 39. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention is directed to the rear of the outermost middle tillage nail among a plurality of middle tillage nails attached to a cultivator, in order to weed the weeds of the root of the plant while traveling in the furrow of the crop. The present invention relates to a stock weeding device to be mounted.
[0002]
[Prior art]
2. Description of the Related Art As an apparatus for weeding in a field, an apparatus mounted on a cultivator and performing weeding simultaneously with medium tilling is known. For example, a weeding rod made of a thin spring is arranged in a rake shape and towed to perform weeding at the base of the stock (for example, Patent Document 1), or a weeding rod is attached to the entire circumference of a rotating wheel, and the rotating wheel is mounted. There is known an apparatus for rotating a root around an inclined axis for weeding (for example, Patent Document 2).
[0003]
[Patent Document 1]
Japanese Patent No. 3370080 [Patent Document 2]
JP-A-2002-305905
However, in each of the above-mentioned traction type or tilt-rotation type weeding devices, the weeding action depth is shallow, and there is a possibility that the crop may be damaged by the contact of the weeding rod, and the locus of movement of the weeding rod is the entire topsoil. However, there was a problem that the portion where the weeding rod did not act remained, and the entire topsoil could not be stirred, so that the unweeded portion remained and the weeding was incomplete. In each of the conventional weeding devices, the soil is largely scattered by the weeding rod at the time of weeding, and it looks as if the weeds were finely removed by the scattered state.In reality, however, the weeding effect is insufficient for the above-mentioned reason. there were.
[0005]
[Problems to be solved by the invention]
SUMMARY OF THE INVENTION An object of the present invention is to mechanically and efficiently perform a weeding operation between crop plants and between plants without damaging the crops in view of the above-mentioned problems of the conventional weeding device.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 for solving the above-mentioned problem is that, while traveling in a furrow of a crop, in order to weed the weeds of the root of the crop, among the plurality of middle tillage claws attached to the cultivators, A root weeding device attached rearward to the back of an outer middle tillage nail, wherein the outer middle tillage claw has a predetermined receding angle and a rake angle at an upper position of a soil action part, and the outer middle tillage has a predetermined rake angle. A horizontal weeding blade disposed in a cantilever shape further outward of the claw, a support tool disposed substantially horizontally toward the rear at the upper position of the outer middle plow, and immediately after the horizontal weeding blade And an elastic spring weeding body arranged to enable weeding of the base of the stock, and the elastic spring weeding body is in a cantilever state with its base end fixed to the support. The predetermined receding angle and the length of which the tip is located further outside than the tip of the horizontal weeding blade. It is characterized by having.
[0007]
When the weeding device is driven by the cultivators and runs through the furrow of the crop, the horizontal weeding blades that make up the shallow soil shallowly cut the soil almost horizontally to the outside of the outermost middle plow near the root of the crop. Thus, the continuity between the topsoil and the lower soil below it is completely cut off, and the shallow topsoil is crushed by the rake angle of the horizontal weeding blade. As a result, the rise of water from the subsoil is prevented, so that the crushed topsoil is immediately dried, and all the weeds in this portion die.
[0008]
Also, behind the horizontal weeding blade that cuts the topsoil, an elastic spring weeding body having a predetermined receding angle is arranged in a cantilever state with its base end fixed to a support. The elastic spring weeding body cuts off the soil near the root of the crop or the soil between the plants without contacting the crop and elastically deforms the crop without damaging the crop, and separates the topsoil from the subsoil. Since the topsoil separated from the subsoil is thin in this way, it is crushed by the movement of the soil. As a result, the rise of water from the subsoil is prevented, the topsoil becomes dry in a short time, and even the weeds near the plant base of the crop are completely killed. high.
[0009]
In addition, the horizontal weeding blades with different lengths of lateral protrusion of the outer middle tillage and the elastic spring weeding body eliminate the entire width of the weeding area from the outer middle tillage to the root of the crop, so that weeding remains. Complete weeding is possible. Further, in the weeding apparatus according to the first aspect of the present invention, most of the horizontal weeding blade and the elastic spring weeding body constituting the same are penetrated into the soil during weeding. The rear supporting pole of the outer middle till, which is equipped with a sword, is far from the crop, so even if the crop grows to some extent and extends to the ground, or if it spreads to the side, the influence of the crop that has grown on the ground is not affected. There is an advantage that weeding work can be performed with almost no reception.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, only a plurality of the elastic spring weed bodies are disposed one after another, and the two elastic spring weed bodies are arranged one after the other. The front end is disposed outside the front end of the front one.
[0011]
According to the second aspect of the present invention, the assigned weeding range of each of the plurality of elastic spring weeding bodies arranged one after another is narrowed. That is, the elastic spring weeding body immediately after the horizontal weeding blade is in charge of weeding from the tip of the horizontal weeding blade to the tip of the elastic spring weeding body. The spring weeding body will be responsible for weeding between the tips of both weeding bodies. In addition, since the force for cutting the soil is distributed to the plurality of elastic spring weed bodies, and the rear elastic spring weed body works effectively, the weeding effect is enhanced.
[0012]
According to a third aspect of the present invention, in the invention of the second aspect, the two elastic spring weeding bodies arranged one after the other are deformed so that the rear one closer to the root of the crop has higher flexibility than the front one. It is characterized by being easy to do.
[0013]
According to the third aspect of the present invention, it is possible to minimize the damage to the plant base of the crop due to the contact of the elastic spring weeding body, and eliminate the remaining weeds, thereby enabling weeding of the plant base of the crop.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in more detail with reference to a plurality of embodiments. FIG. 1 is an overall perspective view of a two-row cultivator B provided with a stock root weeding device A ₁ , A ₁ ′ of the first embodiment of the present invention, and FIG. 2 is a plan view of the same. is also a left side view, FIG. 4 is a perspective view showing a mounting structure of intertillage nail N ₁ front with respect to the crossbeam 19, FIG. 5, the side after being placed in the outermost intertillage nail N ₂ is a perspective view of the mounted strain based herbicide device a ₁ to the back of FIG. 6 is a similarly exploded perspective view, FIG. 7 is a longitudinal sectional view of a portion of the support plate 40 of the stock based herbicide device a ₁ is there.
[0015]
The cultivator B shown in FIGS. 1 to 3 is for two ridges, and includes a pair of middle tillage working machines M symmetrically arranged with respect to the left and right center lines C. _On the rear surface of a pair of middle plows N2 on the rear side arranged on the outermost side of M, stock source weeding devices A ₁ and A ₁ ′ are respectively mounted substantially symmetrically toward the rear. The cultivator B is connected to a fixture 2 having a U-shaped cross section (side surface) fixed to the rear end of the machine frame 1 of the walking type two-wheel tractor T. A vertical shaft insertion hole 3 is formed in each of the upper and lower plate portions 2a constituting the mounting tool 2, and a vertical pin insertion hole is formed in the connecting portion 4a at the tip of the hitch fitting 4. 5, a connecting portion 4a at the tip of the hitch fitting 4 is inserted between upper and lower plate portions 2a constituting the mounting fixture 2, and the respective pin insertion holes 3 formed therein are formed. When the connecting pin 6 is inserted through each of the pin insertion holes 3 and 5, the hitch fitting 4 is connected to the fixture 2 fixed to the rear end of the machine frame 1 via the connecting pin 6. Connected.
[0016]
A square hole 7 is formed at the rear end of the hitch fitting 4 along the vertical direction. At the center of the toolbar 8 arranged in the horizontal direction at the front of the cultivator B, a stringer 9 is fixed substantially horizontally toward the front and fixed at the front end of the stringer 9. The mounting rod 11 extends upward at a right angle and is integrally extended. The mounting rod 11 is inserted from below into the square hole 7 at the rear end of the hitch fitting 4, and the mounting rod 11 is pushed by a push bolt 12. Is pressed against the inner surface of the square hole 7, and the cultivator B is connected to the attachment 2 at the rear end of the machine frame 1 of the walking type two-wheel tractor T via the hitch fitting 4. Thus, behind the walking two-wheel tractor T, the toolbar 8 to the cultivator connected to the tractor T is disposed substantially horizontally with respect to the traveling direction P.
[0017]
In addition, box-shaped (square tube-shaped) work implement fixtures 13 are fitted into both ends of the toolbar 8, respectively, and each work implement fixture 13 has a push bolt screwed to its upper plate. The tool bar 8 is fixed at predetermined positions on both ends of the toolbar 8. On the back side of the work implement fixture 13, a box metal 15 having a square hole formed in the vertical direction is integrally fixed. At the front ends of a pair of main girders 16 arranged on the back side of each work implement fixture 13 along the traveling direction P of the cultivator B, a mounting rod 17 is fixed integrally at a right angle upward. Have been. The main girder 16 has a configuration in which the long sides of the flat steel are vertically arranged, and the mounting rod 17 at the front end thereof is inserted from below into the square hole of the box metal 15 and screwed to the side plate. It is fixed to the box metal 15 by the provided push bolt 18.
[0018]
The horizontal girder 19 is composed of a pair of upper and lower flat girder members 19a made of flat steel, and the main girder 16 is vertically attached to the front end of the main girder 16 on which the long sides of the flat steel are vertically arranged. A pair of cross beams 19a are horizontally arranged and fixed in a horizontal direction (a direction parallel to the toolbar 8) so as to be sandwiched therebetween. As shown in FIGS. 1 and 4, in each of the middle tillage working machines M, a pair of front middle tillage claws N <b> ₁ are arranged symmetrically with respect to the main girder 16, and the back of the horizontal girder 19. It is detachably attached to the front surface of a substantially lower half portion of the front claw support rod 21 arranged vertically in contact with the front claw. The front claw support rod 21 has a lower half curved in a side view, and an upper part thereof is inserted into a box-shaped mounting tool 22, and a fixing bolt 23 is provided on a front end surface of the mounting tool 22. It is attached integrally toward the front. The fixing bolt 23 is also inserted into a fixing plate portion 24a of a box metal 25 and a side girder 24, which will be described later, applied to the front surface of the cross beam 19, and the front end thereof is fixed to a fixing plate portion of the box metal 25 and the side girder 24. 24a, the nut 27 is screwed into this projection and tightened to form a front claw support rod 21 disposed on the back side and the front side of the cross beam 19; The fixing plate portion 24a of the girder 24 is integrally fixed.
[0019]
Further, in each of the tillage working machines M, the pair of side girders 24 are arranged symmetrically with respect to the main girder 16, and are slightly rearwardly opened outside the pair of front claw supporting rods 21. ing. The front ends of the pair of side girders 24 are each bent inward to form fixed plate portions 24a. The box metal 25 having a U-shaped cross section is disposed on the front side of the cross beam 19 so as to sandwich the cross beam 19 from above and below (see FIGS. 1 and 4). Bolt insertion holes 26a and 26b for changing the claw pitch are provided in the fixed plate portion 24a of the side beam 24 and the front plate portion 25a of the box metal 25 at predetermined intervals in the horizontal direction, respectively. The structure in which the front claw support rod 21 and the side beam 24 are integrally fixed to the horizontal beam 19 simultaneously by screwing the fixing bolt 23 and the nut 27 inserted into the bolt insertion holes 26a and 26b is described above. It is as expected.
[0020]
Further, in each of the tillage working machines M, a box metal 28 having a square hole formed vertically is fixed to the rear end of each side girder 24 arranged in the front-rear direction. The upper portion of the claw support rod 29 is inserted from below, and a push bolt 31 is screwed into a bolt screw hole 30 formed in the back plate portion of the box metal 28, and the rear claw support rod 29 is inserted into the square hole. The upper end of the rear claw support rod 29 is fixed to the box metal 28 by being pressed against the inner surface. Intertillage nail N ₂ of the rear to the front of the right and left pair of rear claws support rod 29 is fixedly provided in a symmetrical. Thus, after the pair of side Intertillage nail N ₂ is a pair of the rear Intertillage nail N ₁ of the front, yet because it is located outside, when based on the pair of intertillage nail N _1, the outer It is arranged obliquely rearward.
[0021]
Further, as shown in FIGS. 5 and 6, on the rear side of the pair of left and right Intertillage nail N ₂ of the rear, Ltd. based herbicide device A _{1, respectively,} A 1 _'is mounted, respectively. That is, a back side of Intertillage nail N ₂ the rear, in a substantially central portion in the longitudinal direction, the bolt 33 is fixed integrally toward the obliquely downward at a small angle, the rear claw support rod At a position corresponding to the bolt 33 at the lower end of the bolt 29, a bolt insertion hole 34 is formed. On the other hand, at the front end of the stock weeding device A ₁ , A ₁ ′, there is provided a mounting plate 35 having a rearwardly inclined posture corresponding to the inclined shape of the lower end of the rear claw support rod 29. Is formed with a bolt insertion hole 36 which is oblong in the oblique vertical direction. The bolt insertion holes 34, 36 of each of the rear claw support rod 29 and the mounting plate 35, a bolt 33 which is fixed to the back of Intertillage nail N ₂ on the rear side is inserted, protruding on the rear side of the mounting plate 35 the bolt 33 and is screwed a nut 37, by firmly clamping the rear claw support rod 29 by intertillage nail N ₂ and the mounting plate 35 of the rear, the pair of left and right rear side of each intertillage nail N ₂ At the back, weed stockers A ₁ , A ₁ ′ are mounted, respectively.
[0022]
Next, the stock source weeding apparatuses A ₁ and A ₁ ′ will be described in detail. Incidentally, lines of the original herbicide device A ₁ and the A _{1 'is} only mounting position along the longitudinal direction of the elastic spring herbicidal body 43 constituting this is different, its structure is the same. This strain based herbicide device A ₁ is a flat plate-shaped support plate 40 disposed substantially horizontally toward the rear, base end portion is fixed with a predetermined sweep angle at the front end portion of the support plate 40 It has a horizontal weeding blade 39 and two elastic spring weeding bodies 42 and 43 disposed immediately behind and in parallel with the horizontal weeding blade 39. A substrate 38 is fixed on the inner end surface of the support plate 40 so as to be substantially vertical, and a front end of the substrate 38 is integrally fixed to a side end surface of the mounting plate 35. A horizontal weeding blade 39 having a predetermined receding angle (θ) at the front end of the support plate 40 (see FIG. 1), the whole of which is substantially horizontal, and the base end is fixed, is cut into the soil surface. In order to ensure a predetermined rake angle (α) (see FIG. 7).
[0023]
Immediately behind the horizontal weeding blade 39, the elastic spring weeding body 42 is disposed substantially parallel to the horizontal weeding blade 39 (ie, with a predetermined receding angle (θ)). Immediately behind the body 42, another elastic spring weeding body 43 is disposed substantially parallel to the horizontal weeding blade 39. The elastic spring weeding bodies 42 and 43 have the same configuration and the same mounting structure except for the overall length. That is, each of the elastic spring weeds 42 and 43 is formed of a flexible spring steel wire that does not damage the crop D even when it comes into contact, and a portion near the base end thereof increases the flexibility. The coil is wound several times to form the coil winding portions 42a and 43a, and the leading end thereof is arranged in the front-rear direction (the traveling direction) in order to reduce damage to the stock when contacting the stock. ) It is bent substantially parallel to P or inward. Further, two bolt insertion holes 41 are formed in the support plate 40 in the front-rear direction, and the base ends of the elastic spring weeding bodies 42 and 43 are such that the main body of the bolt 45 is inserted. The base ends of the elastic spring weed bodies 42 and 43 are arranged on the back side of the support plate 40, and are further lower than the base ends of the elastic spring weed bodies 42 and 43. The bolt 45 is inserted from below the washer 44, passes through the bolt insertion hole 41 of the support plate 40, and is screwed with a bolt 45 and a nut 46 projecting from the upper surface thereof. The support plate 40, the base ends of the elastic spring weed bodies 42 and 43, and the washer 44 are firmly tightened by the head and the nut 46, so that each elastic spring weed body is supported on the support plate 40. The base ends of 42 and 43 are fixed.
[0024]
Then, the supporting plate 40 constituting the strain based herbicide device A ₁ in the state where the horizontal herbicidal blades 39 and two elastic spring herbicidal bodies 42, 43 mounted, as shown in Figure 8, the horizontal herbicidal blade 39 the tip of the elastic spring herbicidal body 42 immediately after the lateral is protruded outward by W ₁ along the widthwise direction with respect to the horizontal herbicides blade 39, behind the elastic spring herbicidal body 43, the elastic spring of the tip forward only W ₂ in the width direction with respect to the distal end of the herbicidal body 42 protrudes outward. Further, the rear elastic spring weed body 43 that is easily in contact with the crop D is more flexible than the front elastic spring weed body 42, and prevents damage to the crop D due to contact.
[0025]
With this configuration, as shown in FIGS. 8 and 9, the soil surface of the portion near the plant root Da of the crop D is not the horizontal weeding blade 39 but two elastic spring weeding bodies disposed behind it. Even if the tip of each elastic spring weeding body 42, 43 comes into contact with the root Da of the crop D, as shown by a two-dot chain line in FIG. Since the portion is elastically deformed, the damage of the root Da of the crop D is almost eliminated. In addition, each of the elastic spring weeding bodies 42 and 43 only needs to cut only the protruding widths W ₁ and W _{2 on} the soil surface, and the assigned weeding range is narrowed. Moreover, the rear elastic spring weed body 43, which has a lot of contact with the stock Da of the crop D, is more flexible than the front elastic spring weed body 42, so that the damage of the stock Da of the crop D is increased. Disappears or decreases.
[0026]
Further, cultivators beta B having a strain based herbicide device A ₁ of the first embodiment, the in intertillage working machine M of duplicate is being arranged symmetrically with respect to the left and right of the center line, each intertillage working machine M is , Traveling between adjacent furrows. In this case, each strain based herbicide device A ₁ adjacent phases are disposed inwardly of the Intertillage working machine M, in order to cut the sides of the soil surface of the crop-root Da crops D of the same ridge, Ltd. based Da Alternatively, regarding the elastic spring weeding bodies 42 and 43 whose tips reach the portions close thereto, the tips may interfere with each other. Therefore, as shown in FIGS. 8 and 9, in each middle tillage working machine M, each elastic spring weeding body 42, 43 of each adjacent stock source weeding device A ₁ , A ₁ ′ moves the cultivator B forward. It is arranged slightly shifted along the direction P to prevent the interference.
[0027]
As shown in FIGS. 1 to 3, in each of the tillage working machines M, a central claw support rod 47 is fixed to the side surface of the rear end of the main girder 16 via a bolt 48, the front surface of the lower half of the pawl support rod 47, the center of intertillage nail N ₃ is attached. Central Intertillage nail N ₃ is a center in the width direction in Intertillage working machine M, yet more disposed to the rear than Intertillage nail N ₂ on the rear side of the pair along the traveling direction (longitudinal direction) P of cultivators beta Have been. On the side surface of the front end of the main girder 16, a grounding wheel support girder 49 is attached substantially horizontally toward the front, and a box metal 51 having a square hole in the up-down direction is integrally fixed at the tip. Have been. A support arm 53 that supports the grounding wheel 52 is disposed obliquely rearward, and a support bar 54 is attached to the upper end of the support arm 53 in a vertical direction. And is fixed by bolts 55 from below. As a result, the cultivator B has a form in which a pair of grounding wheels 52 are disposed in front of both ends of the toolbar 8 which is disposed laterally in front of the cultivator B.
[0028]
Then, as shown in FIGS. 8 and 9, when a pair of left and right middle tillage working machines M of the cultivator B are arranged in the furrow K and are towed by the walking type two-wheel tractor T, in the furrow K, The topsoil in the furrow K is plowed by a large number of middle plows N ₁ , N ₂ , N ₃ arranged at predetermined intervals in both the width direction and the traveling direction (front-back direction) P, and weeding is performed. You. In each intertillage working machine M, the most after the pair which is located outside the rear of Intertillage nail N ₂ side, the herbicidal devices arranged substantially symmetrically with respect to left-right symmetry line C of Intertillage working machine M A ₁ When but traveling in the vicinity of the crop-root Da crop D, the horizontal herbicidal blade 39 constituting this is cut outermost an outer intertillage nail N ₂ until Ltd. original Da nearby crops D, substantially horizontally shallow soil As a result, the continuity between the top soil and the lower soil below the top soil is completely cut off, and the shallow top soil is crushed by the rake angle (α) of the horizontal weeding blade 39 (see FIG. 10). As a result, the rise of water from the subsoil is prevented, so that the crushed topsoil is immediately dried, and all the weeds in this portion die. In FIG. 10, S indicates the surface of the topsoil.
[0029]
Behind the horizontal weeding blade 39 for cutting the topsoil, two elastic spring weeding bodies 42 and 43 having a predetermined receding angle (θ) and having different lengths are provided. When the tip of each elastic spring weeding body 42, 43 comes in contact with the root D of the crop D, the tip elastically deforms and damages the crop D. Without doing this, the soil near the root of the crop D or the soil between the plants is cut off, and the topsoil is separated from the subsoil. In this way, the topsoil separated from the subsoil is thin and is crushed by the movement of the soil. As a result, the rise of water from the subsoil is prevented, the topsoil becomes dry in a short time, and even the weeds near the plant base of the crop are completely killed. high.
[0030]
Further, FIGS. 11 and 12 show stock source weeding apparatuses A ₂ and A _{3 of} another embodiment. Strains based herbicide device A ₂ as shown in FIG. 11, the projection of the whole of the elastic spring herbicidal body 56 having a base end portion fixed to the support plate 40 have become wavy, to the side (outside) of the strains based on Da The three protrusions 56a, 56b, 56c are formed, and the longer the protrusions of the successive protrusions 56a, 56b, 56c are disposed rearward, the longer the protrusions sequentially, and the longer the protrusions toward the inside. The coil windings 56d and 56e are formed, and the projections 56a, 56b and 56c are more flexible and elastically deformed toward the rear in order to prevent damage to the crop D due to contact. . Elastic spring herbicidal body 57 constituting the strain based herbicide device _{A 3,} the coil winding portion 56d at the resilient spring herbicidal body 56 of the stock based herbicidal device _{A 2,} by missing 56e, each protrusion 57a of the outward, 57 b , 57c. In this elastic spring weeding body 57 as well, the protruding portions 57a, 57b, and 57c have higher flexibility and are more easily elastically deformed toward the rear.
[0031]
In FIG. 4, while the positions of the box metal 25 and the side girders 24 with respect to the cross girders 19 are fixed, the bolt insertion holes 26a and 26b for inserting the bolts 23 are changed, as shown in FIG. pitch to Q ₁ intertillage nail N ₁ of the pair of front side _'with is changed to the pitch Q ₂ of intertillage nail N ₂ of the pair of rear side is the Q _2' the Q ₁ is changed to. On the other hand, a bolt insertion hole 26a for inserting the bolt 23, without changing the 26b, when changing the position of Hakokin 25 and Gawaketa 24 for cross beams 19, the pitch _{Q 2} of Intertillage nail _{N 2} of the pair of rear is unchanged, the pitch to Q ₁ intertillage nail N ₁ of the pair of front side is changed to the Q _{1 ''.} In addition, when the above-described two types of change of the nail pitch are combined, the change range of the nail pitch is further widened.
[0032]
Moreover, although the middle tillage working machine M of the above-mentioned embodiment is provided with a total of five middle tillage nails N ₁ , N ₂ , and N ₃ , the width of the ridge is narrow and the front pair of middle tillage nails N ₁ is unnecessary. May be used by removing it. Further, by cutting open portion of the soil near the plant D, the to the root portion is prevented from being damaged, most respect to the outside after the pair arranged side Intertillage nail N _2, strain base remove this or using only the herbicide device a ₁ to a _3, or may be shallow soil working portion of the intertillage nail N _2.
[0033]
In the above-described embodiment, the present invention is applied to a cultivator provided with two middle cultivating machines M. However, the present invention is applied to a cultivator provided with three or more multiple cultivating machines M. It is also possible to carry out. In addition, the stock root weeding device according to the present invention is not limited to a cultivator that performs medium tillage weeding, and may be any traction type working machine.
[0034]
【The invention's effect】
When the root weeding device according to the present invention is attached rearward to the back of the outermost middle tillage nail among a plurality of middle tillage nails attached to the cultivator, and the middle cultivation work of the furrow is performed, the crop is harvested. It is possible to mechanically and efficiently perform the root of the crop and the weeding between the plants without damaging the crop.
[Brief description of the drawings]
FIG. 1 is an overall perspective view of a two-row cultivator B including a stock root weeding device A ₁ , A ₁ ′ according to a first embodiment of the present invention.
FIG. 2 is a plan view of the same.
FIG. 3 is a left side view of the same.
4 is a perspective view showing a mounting structure of Intertillage nail N ₁ of the front against the crossbeam 19.
5 is a perspective view of most of the side after being placed on the outside Intertillage nail N lines based herbicide device A ₁ mounted on the back of _2.
FIG. 6 is an exploded perspective view of the same.
7 is a longitudinal sectional view of a portion of the support plate 40 of the stock based herbicide device A _1.
FIG. 8 is a schematic plan view of the cultivator B in which the middle cultivator M is arranged in a furrow K.
FIG. 9 is a partially enlarged view of FIG. 8;
FIG. 10 is a view of the herbicidal weeding devices A ₁ and A ₁ ′ arranged on both sides of the crop D as viewed from the front.
11 is a plan view of the strain based herbicide device A _2.
Is a plan view of FIG. 12 strains based herbicide device A _3.
FIG. 13 is a plan view showing a change in a claw pitch.
[Explanation of symbols]
A _{1 to} A ₃ : Stock root weeding apparatus B: Cultivator D: Crop Da: Crop root K: Row N ₁ : Front middle plow N ₂ : Rear middle plow (outside middle plow)
N ₃ : Central plow α: Rake angle of horizontal weeding blade θ: Retraction angle of horizontal weeding blade 39: Horizontal weeding blade 40: Support plate (supporting tool)
42, 43, 56, 57: elastic spring weeding body

Claims (3)

While running in the furrow of the crop, it is attached to the back of the outermost middle plow out of the plurality of middle plows attached to the cultivator, in order to weed the weeds of the root of the plant, toward the rear. A source weeder,
A horizontal weeding blade having a predetermined receding angle and a rake angle at an upper position of a soil action portion of the outer middle tillage nail and disposed in a cantilever manner further outwardly of the outer middle tillage nail; A support tool disposed substantially horizontally rearward at the upper position of the claw, and an elastic spring weeding body disposed so as to be capable of weeding the weeds of the plant immediately behind the horizontal weeding blade. With
The elastic spring weeding body is in a cantilever state in which the base end is fixed to the support, and has a predetermined receding angle and a length such that the tip is disposed further outside than the tip of the horizontal weeding blade. A herbicide for a cultivator attached to a cultivator, comprising: The elastic spring weed bodies are arranged only in plurals one behind the other, and the two elastic spring weed bodies in front and back are arranged such that the tip of the rear one is located outside the tip of the front one. A plant herbicide mounted on a cultivator according to claim 1. 3. The two elastic spring weeding bodies in front of and behind each other, the rear one being closer to the root of the crop being made more flexible and being more easily deformed than the front one. Weeding equipment installed on cultivators in Japan.

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