JPH08214608A - Weeding blade for cultivator and supporting apparatus for it - Google Patents

Abstract

PURPOSE: To enable the weed cutting between rows or stumps following the irregularity of ground surface. CONSTITUTION: A parallelogram-link mechanism 1, whose lower link comprises a sleigh 2, stands in a freely resiliently swingable manner in the longitudinal direction of a machine body. A pair of the link mechanisms 1 are laterally placed faceing to each other and holding a raw of plants between them. Right and left upper links 3, 3 are connected with a metal frame 6. Long-spring tine-attached sickle blades 19, 20 and short-spring tine-attached sickle blades 25, 26, both curved in a bow-shape, are each fixed on a tine fixing member 16 at a front spot and a middle spot of the sleigh 2, respectively, in which the fixation is achieved with the front end of each sickle blades. They are placed inside the sleighs 2 in a symmetrical state against the center line between the sleighs 2. The rear end of each of the long-spring tine-attached sickle blades 19, 20 has a sickle blade 24. The base parts of the right and left sickle blades 24 are faced to each other having a narrow space between them. Sickle blades 28 of the rear end of the short-spring tine-attached sickle blades 25, 26 are each placed at an out-and-front-side of the sickle blades 24. Every blade is placed on a sleigh 2 directing a back-and-low-side with its edge directing a front-and-obliquely down-side. The blades are arranged in a truncated chevron in terms of the proceeding direction. A vertical rod 13 standing on the metal frame 6 is attached on the main body of the cultivator through a holding member.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeding blade used in a cultivator and a holding device therefor, and more particularly to a weeding blade capable of weeding between plants.

[0002]

2. Description of the Related Art Conventionally, it has been said that weeding between strains cannot be performed because weeding between plants with a cultivator damages crops. There is a proposal of "cultivator spring beach", which is described in Japanese Utility Model Publication No. 60-36002, which enables weeding between plants. According to the above-mentioned invention, a plurality of left and right spring ledges are stacked in the rear part of the cultivator body with appropriate gaps, and several rear end portions of the spring ledges are extended to be bent inward in a dogleg shape. The springs are arranged so as to face each other. This spring beach is used by being pressed against the ground in a slanting manner while sandwiching the stock base in the form of <<< with the outside bent in a dogleg shape.

[0003] The spring shore thus installed adapts to the unevenness of the ground surface by the action of the spring shore which slides shallowly in the soil to freely bounce and move at the same time as the cultivator progresses, tilling the soil between the ridges. , Rubbing the roots of crops to remove weeds and giving proper physical stimulation without cutting the roots of crops to improve the growth. In addition, since the weeds that have been pulled out are folded back into the ridges at the portion bent into a dogleg shape, the weeds die and die, so that an excellent effect of weeding between the ridges and the plants is exhibited.

[0004]

The spring beach described above has no problem with respect to weeds at the time of germination. However, when weeds grow large, for example, when the tractor cannot be put in the field due to long rain, even if the weeds are pulled out by the spring beach, they may have roots or they may be knocked down. , There were quite a few things to play. The removal of this regenerated weed had to rely on manual weeding, which was a very laborious task. In order not to regenerate the weeds, the weeds should be cut at the root. However, it was necessary to solve the difficult problem of cutting the weeds at the root without cutting the crops among the plants.

In addition, depending on the soil condition and the soil condition, the spring bollard may not be able to adapt to the unevenness of the ground surface, resulting in weeds that cannot be pulled out. Furthermore, there have been cases where the spring beach is deformed or broken by the impact of abruptly lowering the spring beach to the ground.

The present invention adapts well to unevenness of the ground surface along the row of crops, not only between the ridges but also between the stocks, and without cutting the crops, cuts even large weeds at the roots, We provide a weed blade for cultivator and its holding device that can crush the soil around ridges and stocks to level the ground and reduce the impact caused by a rapid drop to the ground to prevent deformation and breakage. The purpose is to do.

[0007]

In order to achieve the above object, in the weed cutter for cultivator of the present invention, a parallelogram linkage having a sled as a lower link is erected at the rear of the sled. A tension coil spring stretched between the upper end of the long protrusion and the upper link of the parallelogram link mechanism is erected upright, and the tension coil springs are juxtaposed left and right opposite to each other with an appropriate space between the left and right upper links. Frame the frame horizontally and connect it.
A vertical rod is erected vertically on the upper surface of the frame. The left and right sleds are provided with tine stoppers on the upper surfaces of the front part and the middle part so as to face each other.

[0008] The left side of the arched curve with a sickle blade protruding from one side of the rear end,
The right long spring tine sickle blade and the rear end of the bow-shaped curved left and right short spring tine sickle blades with a sickle blade protruding from one side, the front end to the tine stop of the front and middle of the sled, respectively. Installation, symmetrically arranged on the inside of the left and right sledges with respect to the center line of the inner facing interval, the bases of the sickle blades with long spring tines face each other with a small gap, and The sickle blade is located outside the sickle blade of the sickle blade with the long spring tines, and is arranged in a V shape backward and lower than the left and right sledges in a diagonally downward direction with respect to the forward direction. It is a body.

Further, the left and right long spring tine sickle blades and short spring tine sickle blades are formed on the front end horizontal portions with the front end upper surfaces being flat, and the tine stoppers are
A female screw piece provided with a tine insertion hole for obliquely outwardly inserting the front end horizontal portion at an intermediate portion is projectingly provided on the upper surface of the sled, and a set screw is screwed downward from the center of the top of the female screw piece. did.

Further, the sickle blade with long spring tine and the sickle blade with short spring tine have front ends formed in a ring portion, and screw rods vertically project from the front and middle portions of the left and right sleds. The ring portion and the spring washer may be externally fitted to the threaded rod between the upper and lower nuts, and fixed to the threaded rod by a tine stopper in which a nut is screwed up and down on the threaded rod.

A pipe for holding the weeding blade body on the cultivator main body is externally fitted to a vertical rod standing upright on the upper surface of the frame so as to be vertically movable, and a horizontal rod is horizontally projected at one end. An elevating bracket having a structure in which the horizontal rod is parallel to the frame metal when fixed with set screws screwed to the upper and lower ends of the pipe,
A traverse that is externally fitted to the transverse rod and has a vertical rod vertically erected on the upper surface of the central portion of the pipe, and is fixed to the transverse rod of the elevating bracket through set screws screwed at both ends of the pipe. Composed of brackets and.

Further, in order to enhance the fixing action of the set screw, the set screw is screwed to nuts fixed to the inner peripheral surfaces of both ends of the pipe of the lifting bracket and the pipe of the traverse bracket, respectively, and the axial center line of the pipe is attached. It is effective to have a small intersection with the pipe axis and to be orthogonal to the pipe axis when viewed from the front.

[0013]

With the weed cutting blade for cultivator constructed as described above, the pipe of the raising / lowering bracket is fitted onto the vertical rod standing upright on the frame metal, and the pipe of the traverse bracket is attached to the horizontal rod of the raising / lowering bracket. Fit the vertical rods of the traverse brackets to the appropriate tool bar mounting brackets of the cultivator body so that they can be moved up and down, ground the left and right sleds on both sides of the crop row, and fix the vertical rods of the traverse brackets to the tool bar mounting brackets.

Then, the pipe of the traverse bracket is slid to the left and right with respect to the traverse rod of the elevating bracket, the center lines of the opposing intervals of the left and right sleds are aligned with the crop row, and the elevating bracket and the traverse bracket are respectively arranged vertically on the frame. Secure with a set screw to the rod and the horizontal rod of the lifting bracket. At this time, the lifting bracket and the traverse bracket enable fine adjustment of the vertical and horizontal positions of the weeding blade.

When the cultivator body is advanced, the left and right sleds slide on the ground surface on both sides of the crop. The sliding resistance of the sled against the ground surface during sliding is opposite to the traveling direction of the cultivator and causes the parallelogram linkage mechanism to always swing forward, but the tension coil spring causes the rear end of the sled to move. Using the long protrusion as a fixed point, pull the upper link backward and raise the parallelogram link mechanism to ground the sled to the ground surface.

Then, for example, as shown in FIG.
From the state of gliding on the ground surface GL indicated by the one-dot chain line,
When approaching a convex portion on the ground surface, the front link and the rear link tilt forward in parallel against the tension of the tension coil spring, the sled automatically rises to the position of the solid line, and slides on the convex portion of the ground surface. Like When the sled approaches a recess in the surface of the earth, the tension in the tension coil spring raises the parallelogram linkage, causing the sled to descend into the recess. This operation is performed individually by the left and right parallelogram link mechanisms, and the left and right sleds are slid respectively in conformity with the unevenness of the ground surface on both sides of the crop row, and the long end with the front end attached to the sled. Adapt the sickle blade with spring tine and the sickle blade with short spring tine to the unevenness of the ground surface.

Further, when the cultivator is rapidly lowered to the ground, the parallelogram link mechanism rapidly swings forward, and the weeding blade and the weeding blade holding device receive an impact from the ground. The tension coil spring absorbs an impact by its tension.

The front end horizontal part is fixed to the tine stopper projecting on the front part of the sled, and the left and right long spring tines with a sickle blade and short spring tine with a sickle blade arranged in a V shape at the end in the forward direction The sickle blade moves forward as the left and right sleds advance, cutting forward into the soil below the sled with a downward blade. The left and right long spring tine sickle blades cut into the soil receive cutting resistances R1 and R2 at the resistance center points, respectively, as shown in FIG. This cutting resistance R1 and R
2 generates component forces P1 and P3 orthogonal to the forward direction and component forces P2 and P4 along the forward direction. The component forces P1 and P3 become inward forces against each other, and the sickle blades with long spring tines on the left and right are displaced inwardly against each other against the elastic force of the tines, with the tine stoppers as fixed points, and the sickles facing each other on the left and right sides. Bring the back surface of the blade base close or in contact.

Therefore, the bases of the left and right sickles enter near the base of the plant, and the left and right sickles cut the weeds from the roots. When the ends of the sickle blades with long spring tines on the left and right pass through the root of the crop, contact with the root causes the ends to open outward and allow the crop to pass. At this time, the crop is placed between the left and right backs of the sickle blades and is not cut by the sickle blades.
That is, weeding between plants is possible without cutting the crop. In addition, the sickle blade with a long spring tine with a shallow cutting depth
The back side of the sickle blade rubs the lateral roots of the crop, providing a suitable physical stimulus and promoting crop growth. When the bases of the left and right sickle blades pass through the crop, the bases closed due to the cutting resistance of the sickle blades come in near the roots again and cut the weeds between the roots near the roots.

Further, the sickle blade with short spring tines cuts the weeds from near the root while advancing in the soil in the lower rear of the left and right sleds. In addition, the soil progresses to soften and prevent the soil from solidifying due to the pressure on the sled.

The front end horizontal portions of the left and right sickle blades with long spring tines and sickle blades with short spring tines are shown in FIG.
As shown by the arrow in 3), if you insert it deeply into the tine insertion hole of the tine stopper and fix it, the dimension from the tine stopper to the rear end of the long and short spring tines will be shortened and the elasticity of the spring tine will be strong and the rear end Clearance C
Becomes wider. Further, when the tine insertion hole is shallowly inserted and fixed, the dimension from the tine stopper to the spring tine rear end becomes long, the elasticity is weakened, and the clearance at the rear end is narrowed. When the front end horizontal part with the top surface flat is fixed with the tip of the setscrew, the front end horizontal part does not rotate in the tine insertion hole, and the long spring tine sickle blade and the short spring tine sickle blade are used. Stabilizes the cutting depth of.

The left and right sickle blades with long spring tines and sickle blades with short spring tines have the front end portions as ring portions, and the ring portion and the spring washer are attached to the tine stoppers by screwing nuts on screw rods up and down. When the nut is fitted over the upper and lower nuts and fixed by the nut, loosen the upper nut and rotate the sickle blade around the screw rod as shown in FIG. You can change the relative position of the sickle blade. Also, by moving the lower nut up and down with respect to the threaded rod, it is possible to adjust the mounting height of the ring portion with respect to the sled, and as a result, it is possible to adjust the cutting depth of the sickle blade.

In the elevating bracket and the traverse bracket, a set screw is screwed to a nut fixed to the inner peripheral surface of the pipe and slightly intersects with the axial line of the pipe, and is also provided orthogonally to the axial line of the pipe when viewed from the front. Enables the pipes of the elevating bracket and the traverse bracket to be fixed to the vertical rod and the horizontal rod of the elevating bracket that are erected on the frame without rotating, by intersecting the screwing directions.

[0024]

EXAMPLES Examples will be described with reference to the drawings. In the figure, arrow F indicates the forward direction, and the left and right are displayed facing the forward direction. In FIGS. 1 and 2, the sled 2 is molded with a flat steel plate having a width of about 6 cm and a length of about 30 cm and an appropriate thickness, with its front portion concavely curved. A short projecting piece 7 projecting from the middle part of the sled 2 and a long projecting piece 8 standing upright obliquely rearward at the rear end part are arranged side by side in a vertical line with the same thickness.

The upper end and the lower end of the front link 4 are pivotally attached 11 to the upper end of the short projecting piece 7 and the front end of the upper link 3, respectively, and the rear end of the upper link 3 and the long projecting piece 8 are attached. The upper end and the lower end of the rear link 5 are pivotally connected to the lower end of the
Parallelogram link mechanism 1 with sled 2 as lower link
Is configured. The upper link 3 has an inverted T shape,
If the links 4 and 5 at the front and rear are elongated, they may be rectangular plates. The pivot 11 is a bolt / nut.

Parallelogram Link Mechanism In order to prevent the lateral 1 from rolling, the front link 4 and the rear link 5 are made of synthetic resin on both side surfaces of the upper link 3, the short projecting piece 7 and the long projecting piece 8, respectively. One by one is arranged through the anti-friction seat plate 12 (see FIG. 4). The front link 4 and the rear link 5 can be rocked back and forth around the bolts by the anti-friction seat plate 12 even when the nuts are tightened on the bolts of the pivotally attached 11.

Next, the upper end of the long protrusion 8 and the upper link 3
A tension coil spring 10 is stretched between the above and the upper link 3 is pulled by using the long projecting piece 8 as a fixed point to erect the parallelogram link mechanism 1. The long protrusion 8 also serves as the pivotal attachment 11 at the lower end of the rear link 5, but may be provided with only the tension coil spring 10. In that case, another short projection piece 7 is provided in front of the long projection piece 8 to form the parallelogram link mechanism 1. The parallelogram link mechanisms 1 that have stood upright are placed side by side opposite to each other with an appropriate interval, and a frame metal 6 is laterally connected to the upper portions of the left and right upper links 3. The left and right upper links 3 and the frame 6 are
It may be integrally formed.

The suitable distance is about 25 cm between the inner edges of the sleds 2 and 2 so that the sleds 2 and 2 can slide on both sides of the crop. The height from the bottom surface of the frame member 6 to the bottom surface of the sled 2 is about 2 when the parallelogram link mechanism 1 is in the upright state.
At 8 cm, the frame 6 is high enough for the sleds 2 and 2 to slide on both sides of the crop.

Reference numeral 13 is a vertical rod for attaching the left and right parallelogram link mechanisms 1 to the cultivator main body, and the base is fixed to the upper surface of the frame 6 by bolts and nuts 14 to stand vertically. The frame 6 is provided with an adjusting hole 15 and is provided with a vertical rod 13
The position of can be changed left and right. 9 are projections provided on both sides of the middle portion of the long protrusion 8 (see FIG. 4), and the rear link 5
It contacts the back end face of the parallelogram linkage mechanism 1 and limits the rearward swing of the parallelogram linkage mechanism 1. The rearward swing of the parallelogram link mechanism 1 can be limited by contact between the rear end surface of the upper link 3 and the front end surface of the long projecting piece 8, and the projection 9 is not always necessary.

Referring also to FIG. 3, tine stoppers 16 are provided on the upper surfaces of the sleds 2 and 2 so as to project from the front and middle portions of the sleds 2, and the sleds 2 and 2 are opposed to each other in the left and right directions. The tine stopper 16 includes a female screw piece 17 having an insertion hole A formed obliquely outward with respect to the longitudinal centerline of the sled 2 in the middle portion thereof. As shown in FIG. Is screwed in until it reaches below the insertion hole A.

Reference numerals 19, 20 and 25, 26 denote left and right sickle blades with a long spring tine and a sickle blade with a short spring tine, respectively, which are curved arcuately in a plan view and from the front end horizontal portions 21 and 27 in a side view. At the ends of the long spring tine and the short spring tine extending downwardly and gently downward, the blades are inclined forward and downward, and the sickle blades 24 and 2 respectively.
Reference numeral 8 is one-sided projecting obliquely receding toward the concave curved side of the bow. The left and right sickle blades 19 and 20 with long spring tines and the sickle blades 25 and 26 with short spring tines are symmetrical with each other. The front end horizontal portions 21 and 27 are straight rods having a length of about 9 cm.

Then, the left and right sickle blades with long spring tines 19 and 20 are inserted into the tine insertion holes A of the front tine stopper 16 through the front end horizontal portion 21, and the left and right sickle blades with short spring tines are inserted. Similarly, insert the front end horizontal portion 27 into the tine stopper 16 of the intermediate portion by inserting 25 and 26 into the tine stopper 16.
8 and the left and right sleds 2, 2 are arranged symmetrically with respect to the center line of the facing interval, and the bases of the left and right long sickle blades 24 of the sickle blades are made to face each other with a small gap,
The sickle blade 28 of the sickle blade with a short spring tine is placed outside the front of the sickle blade 24 of the sickle blade with a long spring tine, and the respective sickle blades 24, 28 are arranged in the shape of a letter "H" in the forward lower direction of the sled. are doing. Since the tine stoppers 16 are provided on the front and middle portions of the sled 2, the sickle blades 25 and 26 with short spring tines are arranged outside the sickle blades 19 and 20 with long spring tines as shown in FIG. While being provided, the forward trajectories of the base end of the blade 28 and the tip of the sickle blade 24 overlap.

The sickle blade 24 has a blade length of about 16 cm and a width of 2 cm,
The whole is shallowly concave and curved, and when it goes under the surface shallowly, it passes above the roots of the crops and does not damage the crops.
Further, in order to penetrate into the ground, the blade of the sickle blade 24 is directed obliquely downward and forward, but as shown in FIG. 8, the penetration angle α with respect to the horizontal plane HL is 15 to 20 degrees. Sickle blade 28
Has a width of 2 cm and a blade length of about 18 cm, and is shallowly concavely curved, and the penetration angle is the same as that of the sickle blade 24.

The sickle blades 24, 28 may be at the same position (being the depth from the ground surface) in the lower rear part of the sled 2, but usually the soil surface lowers as the ground surface moves away from the plant base of the crop due to soil gathering. Therefore, the sickle blade 28 is set lower than the sickle blade 24. When the cutting depth d from the ground surface GL on which the sled 2 travels is set to about 1 cm (see FIG. 2), the sickle blade 24 does not damage the lateral roots of the crop. Since the sickle blade 28 does not cut the crop by advancing to a position away from the plant base, it does not matter if the depth of soil cutting is a little deep. Generally, it should be about 4 cm lower than the sickle blade 24.

Sickle blades 19 and 2 with long spring tines
The sickle blades 25 and 26 with zero spring tine and short spring tine respectively form the long spring tine and the short spring tine with a wire material having a suitable thickness such as a piano wire that is hard and elastic. Long spring tine has a wire diameter of 4 m
m, the linear dimension from the front end to the terminal is about 36 cm.
The short spring tine has a wire diameter of 4 mm or 5 mm and a linear dimension from the front end to the terminal of about 16 cm.

As described above, the sickle blades 19 and 20 with the left and right long spring tines have the sickle blades 24 inwardly moved toward each other by the cutting resistance in the soil and enter between the plants to cut the weeds from the roots. The fact that the crop is not cut because it is inside the sickle blade 24 is the technique by which the weeding blade of the present invention enables inter-plant weeding. Therefore, the magnitude of the elastic value (spring constant) of the long spring tines is important. The wire diameter and length of the long spring tine described above were suitable as a result of various experiments. The right and left sickle blades 28 of the short blades 25 and 26 with spring tines are not related to weeding between plants, so that a large spring constant does not matter.

As shown in FIG. 9, the front end horizontal portions 21 and 27 have their upper surfaces cut into a plane a so that they do not rotate around the center of the cross section of the wire when they are fixed by the setscrews 18. desirable. This is because the sickle blades 24 and 28 located at the rear are caused by the slight rotation of the front end horizontal portions 21 and 27.
This is because the cutting depth in soil changes significantly.

FIG. 13 shows a sickle blade 1 with a long spring tine.
9 and 20 and sickle blades 25 and 26 with short spring tines The front end horizontal portions 21 and 27 are inserted into the tine insertion holes A of the tine stopper 16 and slid diagonally outward as shown by the arrows. It shows that the clearance C between the back surfaces of the bases becomes large. Clearance between the rear surfaces of the bases of the sickles 28, 28 is similarly increased. Although illustration is omitted, the clearance C is reduced by sliding in the direction opposite to the arrow.

Next, reference numerals 31 and 32 shown in FIG. 7 are long spring tines, and sickle blades 19 and 20 with long spring tines.
The sickle blade 24 part is formed into the outward bending part 33 with the wire material of the spring tine as it is. As shown in FIG. 10, the outward bent portion 33 is formed by cutting the upper and lower surfaces of the piano wire rod so that the wedge angle γ is about 15 degrees with respect to the front and fixing the front end horizontal portions 21 and 27 to the tine stopper 16 so as to be horizontal. On the other hand, the downward tilt angle β is about 30 degrees and the front surface is directed forward. This is suitable for early weeding in the germination stage, and the weeding action is the same as that of the above-mentioned known spring beach, except that the outward bent portion 33 is provided with a wedge angle which is a kind of blade.

14 and 15 show a sickle blade with a long spring tine 22 and a sickle with a short spring tine in which the front end portions of the sickle blade 19 with a long spring tine and the sickle blade 25 with a short spring tine described above are ring portions 34, respectively. Blade 2
9 is shown. Although not shown, the sickle blade 20 with long spring tine and the sickle blade 2 with short spring tine described above
The front end portion of 6 is also made into a ring portion 34, respectively, and a sickle blade 23 with a long spring tine and a sickle blade 30 with a short spring tine 30
To form. As shown in FIG. 16, these are attached and fixed by the tine stoppers 35 protruding from the upper surface of the sled 2. The position of the tine stopper 35 is the same as that of the tine stopper 16 described above.

As shown in FIG. 17, the tine stopper 35 is obtained by vertically screwing a nut 37 to a screw rod 36 protruding vertically from the upper surface of the sled 2, and connecting the ring portion 34 together with a spring washer 38. The screw rod 36 is externally fitted between the upper and lower nuts 37, and the upper and lower nuts 37 are fixed as lock nuts. That is, the ring portion 34 is attached to the upper and lower nuts 37, 3
The structure is such that it can be firmly tightened with 7, and can be tightly fixed by the action of the return elastic force of the spring washer 38.

The upper nut 37 is loosened, and the sickle blade 22 with a long spring tine and the sickle blade 29 with a short spring tine 29 are attached.
Is swung around the threaded rod 36 via the ring portion 34, the sickle blades 24, 28 are brought to desired positions as shown in FIG.
Fix again with nuts 37, 37, and the sickle blade 24 with the long spring tine sickle blade 22 and the short spring tine sickle blade 29,
The mounting-related positions of 28 can be changed. Further, the position of the lower nut 37 can be moved up and down in advance to adjust the mounting height of the front ends of the sickle blades 22 and 23 with spring tines and the sickle blades 29 and 30 with short spring tines. There is. The cutting depth of the sickle blades 24, 28 can be adjusted by adjusting the mounting height of the front end portion.

Next, a device for holding the weeding blade body on the cultivator main body will be described. In FIG. 1, the raising / lowering bracket 39 is fitted on the vertical rod 13 so that the pipe 4 can be fitted up and down freely.
When the pipe 40 is fixed to the vertical rod 13 with setscrews 42, 42 screwed to the upper and lower end portions of 0, the horizontal rod 43 horizontally projected on the pipe 43 is vertically moved with the frame 6 at an appropriate interval. It is configured to be parallel. Also, the transverse bracket 44
Is a set screw 42, 42 screwed onto the center line of the upper surface of the pipe 46 which is fitted onto the horizontal rod 43 so as to traverse freely.
When 6 is fixed to the horizontal rod 43, the vertical rod 45 standing on the upper surface of the pipe 46 is configured to be perpendicular to the horizontal rod 43.

As shown in FIG. 4, the set screws 42, 42 are screwed to nuts 43, 43 fixed to the inner peripheral surfaces of both ends of the pipe 40, respectively.
It intersects slightly with the axis of the pipe, and is juxtaposed perpendicularly to the pipe axis when viewed from the front. The pipe 46
Set screws 42, 42 are also provided in the same manner.

In FIG. 1, reference numeral 47 is a known tool bar mounting member consisting of a main body 48, a pad 51 and a tightening screw / nut 52, and the main body 48 is provided with a socket portion 49 provided with a set screw 50. Toolbar mounting bracket 4
As shown in FIG. 1, 7 is attached to the tool bar 54, but if the form of the tool bar changes, an appropriate tool having a socket portion is selected.

FIG. 6 is a partially omitted plan view showing a state in which the weeding blade is held and used by the tractor cultivator. In the figure, T is a tractor, 53 is a cultivator main body, and is connected to the tractor T via a three-point link hitch mechanism 55. Reference numeral 54 is a toolbar, 56 is a ruler wheel, and 57 is a beam for mounting the middle tillage claw 58 on the toolbar 54.

In order to hold the weeding blade on the cultivator main body 53, the pipe 40 of the lifting bracket 39 is externally fitted to the vertical rod 13 of the frame 6 and fixed with the set screw 42, and then the transverse bracket 44 is lifted. It is externally fitted to the horizontal rod 41 of 39 and is fixed with a set screw 42. And the transverse bracket 4
Insert the vertical rod 45 of No. 4 into the socket portion 49 of the tool bar mounting bracket 47 attached to the tool bar 54 from below,
Secure with set screw 50.

For use in the field, the cultivator main body holding the weeding blade as described above is connected to the tractor T via the three-point link hitch mechanism 55. Then, slide the toolbar mounting bracket 47 to the left or right with respect to the toolbar 54,
The left and right sleds 2 are fixed so that the center lines of the facing intervals are substantially along the row of the crop S. At this time, when the tool bar mounting bracket 47 cannot be slid to an appropriate position due to the structure of the tool bar 54, the traverse bracket 46 is moved up and down.
Slide it to the horizontal rod 41 and put it in an appropriate position. On the other hand, the ruler wheel 56 traveling between the ridges is used to drive the cultivator body 53.
Is supported substantially horizontally with the ground surface, and the vertical rod 45 of the transverse bracket 44 is moved up and down with respect to the tool bar mounting bracket 47.
The elevating bracket 39 is moved up and down with respect to the vertical rod 13, the left and right sleds 2 are grounded, and the vertical rod 45 and the elevating bracket 39
Are fixed to the tool bar mounting bracket 47 and the vertical rod 13, respectively.

Then, when the tractor T is advanced, the left and right sleds 2 are advanced by the action of the parallelogram link mechanism 1 while individually adapting to the unevenness of the ground surface on both sides of the crop row. Along with this forward movement, the sickle blades 24, 24 of the long sickle blades 19 and 20 provided on the left and right sleds 2 enter between the plants and cut the weed w near the root without damaging the crops. As described above, the sickle blades 28, 28 of the sickle blades 25, 26 also cut the weeds w at positions away from the stock.

[0050]

Since the present invention has the above-described structure, it has the following effects.

A parallelogram link mechanism is constructed by using the sled as a lower link, and this is erected by a tension coil spring stretched between the upper end of a long projecting piece standing at the rear of the sled and the upper link. The left and right sleds are individually adapted to slide on the unevenness of the ground surface on both sides of the crop row by the function of the tension coil springs, which are installed side by side opposite to each other and are connected by the frame metal that is laid between the upper links. be able to. After that, the sickle blades with long spring tines and sickle blades with short spring tines, which were installed between the insides of the sleds by attaching the front ends to the left and right sleds, adapt well to the unevenness of the ground surface and cut into the soil, Can be cut. In addition, even if the sled touches the ground rapidly, the tension coil springs absorb the impact,
It is possible to prevent damage to the weeding blade.

In particular, the sickle blades with long spring tines in which the front end portions are attached to the front tine stoppers of the left and right sledges, and the sickle blades at the end portions are placed at the lower rear of the sledges in a V shape in the forward direction, , If the crop rows are placed along the opposite center lines of the left and right sleds, they are displaced inward by the cutting resistance of the sickle blade as described above, and the left and right facing sickle blades enter between the plants, Weeds can be cut. Also, when the base of the sickle blade passes through the plant base, the back surface of the base of the sickle blade opens outward due to contact with the plant base, allowing the crop to pass through. At this time,
The crop is between the left and right sickle blade bases and is not cut by the sickle blade. That is, weeding between plants can be performed without damaging the crop.

Further, the sickle blade with a short spring tine, whose front end is fixed to the tine stoppers protruding from the middle portion of the left and right sleds, is arranged in front of and outside the sickle blade with a long spring tine. Weeds at locations away from the root can be cut off near the root and weeded. Further, the sickle blade with a short spring tine swells the soil behind the sled by cutting in the soil, so that the soil can be prevented from being compacted.

The tine stopper projecting on the sled is provided with a tine insertion hole obliquely outward in the middle of the female screw piece, and the set screw is screwed from the top surface to below the tine insertion hole. By fixing the sickle blade and the sickle blade with short spring tines so that the upper surface of the front end horizontal part is a flat surface and is fixed in the insertion hole of the tine stopper so that the front end part can rotate around the tine axis in the tine insertion hole. It can be static. Therefore, it is possible to prevent the sickle blade from rotating around the tine axis and obstructing the cutting of weeds. Also, by pushing the front end part out of the tine stopper and fixing it, it is possible to change the elasticity of the sickle blade with long spring tines, the sickle blade with short spring tines, and the opposite clearance on the back surface of the base of the sickle blades, so it can be used in field conditions. Correspondingly, the elasticity and the clearance can be adjusted to the appropriate ones.

Further, the sickle blades with long spring tines and sickle blades with short spring tines have the front end portions as ring portions, and the tine stoppers are screwed vertically on the upper surface of the sled, and nuts are screwed up and down. When the ring portion is fitted together with the spring washer on the screw rod between the upper and lower nuts and fixed by the upper and lower nuts, loosen the upper nut and rotate the ring portion around the screw rod, By fixing the nuts again, the relative positions of the left and right sickle blades can be changed. Furthermore, the height of the attachment position of the ring portion can be adjusted by moving the lower nut up and down. In other words, the relative position of the sickle blade with long spring tines and the sickle blade with short spring tines, and the cutting depth of the sickle blade can be adjusted appropriately according to the field conditions.

The holding and mounting of the weeding blade can be fixed to the vertical girder of the weeding blade so that it can be lifted and lowered, and it can be fixed to the horizontal rod of this lifting bracket so that it can traverse, and it can be attached to the main body of the cultivator as a tool bar attachment. Since it is composed of a traverse bracket having a vertical rod to be inserted, it is possible to finely adjust the horizontal position and the vertical position with respect to the cultivator body. Further, even if the toolbar mounting bracket cannot be mounted at an appropriate position due to the structure of the toolbar, the horizontal bracket can be used to adjust the left and right positions. That is, it is possible to provide a holding device that can be widely applied to cultivator bodies of different types.

The set screws provided at both ends of the pipe of the lifting bracket and the traverse bracket are screwed onto the welded nut on the inner peripheral surface of the pipe to intersect with the pipe axis, so that the vertical rod and the horizontal rod are externally fitted. The pipe can be fixed without rotating due to the pressing force that intersects. Further, since the nut is welded to the inner peripheral surface, the screwing force of the set screw works so as to press the upper surface of the nut against the inner peripheral surface of the pipe, and therefore the welding of the nut does not peel off from the inner peripheral surface of the pipe.

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention.

FIG. 2 is a right side view of a main part of the embodiment shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a front view of a vertical section taken along the line BB of FIG.

5 is an enlarged sectional view taken along the line CC of FIG.

FIG. 6 is a partially omitted plan view showing a usage state of the tractor cultivator.

FIG. 7 is a plan view of a main part to which a long spring tine according to another embodiment is attached.

FIG. 8 is an enlarged end view taken along the line D-D in FIG.

9 is an enlarged vertical sectional view taken along the line EE of FIG.

FIG. 10 is an enlarged end view of the FF line vertical section of FIG.

FIG. 11 is a right side view of a main part for explaining the operation of the sled.

FIG. 12 is a plan view of relevant parts for schematically explaining the operation of the sickle blade with long spring tines.

FIG. 13 is a plan view of a main part showing the attachment adjustment of the long blade sickle blade and the short blade sickle blade.

FIG. 14 is a plan view of another example of a sickle blade with long spring tines.

FIG. 15 is a plan view of another example of a sickle blade with another short spring tine.

FIG. 16 is a plan view of a main part showing the attachment adjustment of the sickle blade with a long spring tine and the sickle blade with a short spring tine according to another embodiment.

FIG. 17 is a vertical cross-sectional view of the main part of FIG. 16G-G line.

[Explanation of symbols]

 1 parallelogram link mechanism 2 sled 3 upper link 6 frame metal 8 long protruding piece 10 tension coil spring 13 vertical rod 16, 35 tine stopper 17 female screw piece A tine insertion hole 18, 42 set screw 19, 20, 22, 23 length Sickle blade with spring tine 21,27 Front end horizontal part 24,28 Sickle blade 25,26,29,30 Short sickle blade with spring tine 34 Ring part 36 Screw rod 37, Nut 38 Spring washer 39 Lifting bracket 40,46 Pipe 41 Horizontal Rod 43 Nut 44 Traverse bracket 45 Vertical rod

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[Procedure amendment]

[Submission date] November 25, 1995

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] Full text

[Correction method] Change

[Correction content]

[Document name] Statement

Title: Weeding blade for cultivator and holding device thereof

[Claims]

4. Left and right long spring tines (31, 3)
2), the left and right sickle blades with long spring tines (1
The sickle blade (24) of 9, 20) is attached to the wire end of the spring tine.
The end portion is formed as an outward bent portion (33).
The weeding blade for cultivator according to 1.

5. The sled (2) is used as a lower link and elastically
Parallelogram link machine that can stand up and down freely
併 a configuration (1), the left and right opposed through a suitable interval to sandwich the crop row
Installed on the left and right parallelogram link mechanisms (1, 1)
On the upper surface of the frame metal (6) fixed horizontally across the link (3)
Weeding for cultivator with vertical rods (13) installed vertically
In the blade, externally fitted vertically movably in the Tate杆(13),
A pipe (4) having a horizontal rod (41) horizontally projected on one end side surface.
0) is fixed to the vertical rod (13) with setscrews (42) screwed to the upper and lower ends of the pipe (40), respectively.
The horizontal rod (41) is located above the frame (6) and is located above the frame (6).
Lifting bracket (39) configured to be parallel to
And, a pipe (46) which is fitted to the horizontal rod (41) so as to traverse freely and has a vertical rod (45) vertically erected on the upper surface of the central portion is screwed to both ends of the pipe (46), respectively. A horizontal rod (4) of the lifting bracket (39) is attached via a set screw (42).
1) A holding device for a cultivator weeding blade, which comprises a transverse bracket (44) fixed to (1).

Wherein said set screw (42, 42) the pipe of the lift bracket (39) (40), each secured to a nut at both ends in the circumferential surface of the pipe (46) of the transverse brackets (44) (43, screwed to 43), crossed with each other with respect to the axial line of the pipe respectively Rutotomoni, front view of a pipe axis and the holding device of the cultivators beta for herbicidal blade according to claim 5, wherein those features orthogonally.

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a weeding blade used for a cultivator and a holding device for the weeding blade, and more particularly to a weeding blade capable of weeding between plants.

[0002]

2. Description of the Related Art A conventional from the strains in the Cultivators beta herbicides
As to possible, for example, Japanese Utility Model 60-360
02 Patent Publication No. "Cultivators beta of spring broom" of Shosai
It is known . According to the above-mentioned invention, a plurality of left and right spring ledges are stacked in the rear part of the cultivator body with appropriate gaps, and several rear end portions of the spring ledges are extended to be bent inward in a dogleg shape. The springs are arranged so as to face each other. This spring beach is used by being pressed against the ground in a slanting manner while sandwiching the stock base in the form of <<< with the outside bent in a dogleg shape.

[0003] The spring shore thus attached adjusts to the unevenness of the ground surface by the action of the spring shore which slides shallowly in the soil to freely bounce and move while simultaneously cultivating the soil between the ridges as the cultivator progresses. , Rubbing the roots of crops to remove weeds and giving proper physical stimulation without cutting the roots of crops to improve the growth. In addition, since the weeds that have been pulled out are folded back into the ridges at the portion bent into a dogleg shape, the weeds die and die, so that an excellent effect of weeding between the ridges and the plants is exhibited.

[0004]

[Problems to be Solved by the Invention] The above-mentioned spring beach has no problem with regard to weeds at the time of germination. However, for example, when weeds grow large due to the inability to put cultivators in the field due to long rain,
Even if the weeds were pulled out by the spring beach, there were many things to regenerate, because they had roots or were just knocked down. The removal of this regenerated weed had to rely on manual weeding, which was a very laborious task. In order not to regenerate the weeds, the weeds should be cut at the root. However, it was necessary to solve the difficult problem of cutting the weeds at the root without cutting the crops among the plants.

[0005] In addition, depending on the soil and soil condition, the only work in which the spring broom bouncing to not completely conform to the surface of the irregularities, weeds that are not pulled out there was also cause Turkey. further,
By the impact of suddenly dropping the spring beach to the ground,
There were also cases where the spring beach was deformed or damaged.

The present invention adapts well to unevenness of the ground surface not only between the ridges but also between the plants along the row of crops, so that even large weeds can be cut at the roots without cutting the crops, and the ridges can be cut. Weed cutter blade for cultivator and its holding device that can crush the soil in the space and around the plant to level the ground and reduce the impact caused by a rapid drop to the ground to prevent deformation and breakage. Is intended.

[0007]

In order to achieve the above object, in the weed cutter for cultivator of the present invention, the sled serves as a lower link and elastically stands up back and forth so as to be swingable.
The parallelogram link mechanism that was made into one is installed side by side opposite to each other with an appropriate interval sandwiching the crop row, and the parallel
Frame frame is horizontally installed and connected to the upper link of the quadrilateral link mechanism
And, the stringers vertically erected on the upper surface of the Wakukin. The left and right sleds are provided with tine stoppers on the upper surfaces of the front part and the intermediate part so as to face each other .

[0008] Then, the left and right long spring tines of a bow curve with a sickle blade protruding on one side of the rear end and the left and right short spring tines of a bow curve with a sickle blade protruding on one side of the rear end. Attach the sickle blades to the tine stoppers at the front and middle of the sled, and attach the front ends to the insides of the left and right sleds symmetrically with respect to the center line of the inner facing distance. the sickle blade base of the blade is opposed via a small gap, the sickle blade short spring tine sickle blade before position outward of the sickle blade of the long spring tine with sickle blade, which
La Place blade for each <br/> forward Oite rearward and lower in the obliquely downward V-shape than the left and right warp is obtained by the cultivators beta for herbicide blade.

Further, the left and right sickle blades with long spring tines and sickle blades with short spring tines are formed in the front end horizontal portion where the upper surface of the front end portion is a flat surface, and the tine stopper is provided in the middle portion with the front end horizontal portion. A female screw piece provided with a tine insertion hole that is inserted obliquely outwardly is provided on the upper surface of the sled so that a set screw is screwed downward from the center of the top of the female screw piece.

Further, the sickle blade with long spring tine and the sickle blade with short spring tine have front end portions formed in a ring portion, and screw rods vertically project from the front and middle portions of the left and right sleds. The ring portion and the spring washer may be externally fitted to the threaded rod between the upper and lower nuts, and fixed to the threaded rod by a tine stopper in which a nut is screwed up and down on the threaded rod. In addition, the left and right long spring tines
Fold the attached sickle blade outward at the end of the wire rod of the spring tine.
Use a long spring tine on the left and right for the curved part.
You can also do it .

A pipe for holding a weeding blade body on a cultivator main body is vertically fitted on a vertical rod vertically erected on the upper surface of the frame metal, and a horizontal rod is horizontally projected on one side of one end. a set screw which is screwed onto the lower end portion of the pipe the girder
When fixed to, the horizontal rod is a lifting bracket configured to be parallel to the frame metal, and a pipe having a vertical rod vertically erected on the upper surface of the central portion which is externally fitted to the horizontal rod so as to traverse. The horizontal bracket is fixed to the horizontal rod of the elevating bracket through set screws respectively screwed to both ends.

Further, in order to enhance the fixing action of the set screw, the set screw is screwed to nuts fixed to the inner peripheral surfaces of both ends of the pipe of the elevating bracket and the pipe of the traverse bracket, respectively, and the axial center line of the pipe is attached. On the other hand, it is effective to have them intersect with each other and be installed perpendicularly to the pipe axis in a front view.

[0013]

With the weed cutting blade for cultivator configured as described above, the pipe of the raising / lowering bracket is fitted onto the vertical rod standing upright on the frame metal, and the pipe of the traverse bracket is attached to the horizontal rod of the raising / lowering bracket. Fit the vertical rods of the traverse brackets to the appropriate tool bar mounting brackets of the cultivator body so that they can be moved up and down, ground the left and right sleds on both sides of the crop row, and fix the vertical rods of the traverse brackets to the tool bar mounting brackets.

Then, the pipe of the traverse bracket is slid to the left and right with respect to the traverse rod of the elevating bracket, the center lines of the facing intervals of the left and right sleds are aligned with the crop row, and the elevating bracket and the traverse bracket are respectively attached to the vertical frame of the frame. Secure with a set screw to the rod and the horizontal rod of the lifting bracket. At this time,
The lifting bracket and the traverse bracket allow fine adjustment of the vertical and horizontal positions of the weeding blade.

Then, when the cultivator body is advanced, the left and right sleds slide on the ground surface on both sides of the crop. Sliding resistance between the surface of the sled during planing acts opposite to the traveling direction of row crop beta, but results acts to swing the parallelogram link mechanism to always forward parallelogram linkage
The elastic rising action of the lower grounds the sled that is the lower link to the ground surface.

Then, for example, as shown in FIG. 11, when the sled slides on the ground surface GL indicated by the alternate long and short dash line and approaches a convex portion of the ground surface, the front link and the rear link are elastically moved. manner parallel to inclined forward, sled automatically rises to the position indicated by the solid line, so that sliding on the ground surface of the convex portion.
When the warp comes to the surface of the recess, flat ascending quadrilateral link mechanism is TatsuOkoshi, lowering the sled in the recess. This operation is
The left and right parallelogram linkages are individually performed, and the left and right sleds are slid individually in conformity with the unevenness of the ground surface on both sides of the crop row, and the long spring tine sickle blade with the front end attached to the sled. And adapt the sickle blade with short spring tines to the unevenness of the ground surface.

When the cultivator is rapidly lowered to the ground, the parallelogram link mechanism rapidly swings forward and the weeding blade and the weeding blade holding device receive an impact from the ground. Elastic rocking cushions the shock.

[0018] Left and right long spring tines with sickle blades and short spring tines with the front end horizontal part fixed to the tine stopper protruding from the front part of the sled The sickle blade moves forward as the left and right sleds advance, cutting forward into the soil below the sled with a downward blade. The left and right long spring tine sickle blades cut into the soil receive cutting resistances R1 and R2 at the resistance center points, respectively, as shown in FIG. This cutting resistance R1 and R
2 generates component forces P1 and P3 orthogonal to the forward direction and component forces P2 and P4 along the forward direction. The component forces P1 and P3 become inward forces against each other, and the sickle blades with long spring tines on the left and right are displaced inwardly against each other against the elastic force of the tines, with the tine stoppers as fixed points, and the sickles facing each other on the left and right sides. Bring the back surface of the blade base close or in contact.

Therefore, the bases of the left and right sickles enter near the base of the plant, and the left and right sickles cut the weeds from the roots. When the terminal portions of the left and right of the long spring tine with sickle blade passes strain base crop, the terminal portion is opened outward by contact with a strain base, passing crop. At this time, the crop is placed between the left and right backs of the sickle blades and is not cut by the sickle blades. That is, weeding between plants is possible without cutting the crop. In addition, the sickle blade with a long spring tine with a shallow cutting depth rubs the lateral roots of the crop with the back surface of the sickle blade and gives an appropriate physical stimulus to promote the growth of the crop. When the base of the left and right sickle blade passes through the crop enters the base closed by the cutting resistance of the sickle blade close again strain base, the base near the weeds between strains
In disconnecting.

Further, the sickle blade with short spring tines cuts weeds from near the root while advancing in the soil at the lower rear of the left and right sleds. In addition, the soil progresses to soften and prevent the soil from solidifying due to the pressure on the sled.

When the front horizontal parts of the left and right long spring tine sickle blades and short spring tine sickle blades are deeply inserted and fixed in the tine insertion holes of the tine stopper, for example, as shown by arrows in FIG. To the rear end of the long and short spring tines are shortened, the elasticity of the spring tines is increased, and the clearance C at the rear end is widened. If the tine is inserted into the tine insertion hole shallowly and fixed, the dimension from the tine stop to the rear end of the spring tine becomes long, the elasticity becomes weak, and the clearance at the rear end becomes narrow. The front horizontal portion in which the upper surface plane, when secured with set screw tip, to those that do not rotate the front horizontal portion in the tine insertion hole, sickle sickle blade Contact good beauty short spring-tine with long spring tine Stabilizes the cutting depth of the blade.

The left and right sickle blades with long spring tines and sickle blades with short spring tines have the front end portions as ring portions, and the ring portion and the spring washer are attached to the tine stoppers by screwing nuts on screw rods up and down. When the nut is fitted over the upper and lower nuts and fixed by the nut, loosen the upper nut and rotate the sickle blade around the screw rod as shown in FIG. You can change the relative position of the sickle blade. Also, by moving the lower nut up and down with respect to the threaded rod, it is possible to adjust the mounting height of the ring portion with respect to the sled, and as a result, it is possible to adjust the cutting depth of the sickle blade.

[0023] In the lift bracket and transverse bracket set screw screwed into a nut fixed to the inner circumferential surface of the pipe, the crossing each other with respect to the axial line of the pipe, and parallel in perpendicular to the pipe axis in the front view Enables the pipes of the elevating bracket and the traverse bracket to be fixed to the vertical rod and the horizontal rod of the elevating bracket that are erected on the frame without rotating, by intersecting the screwing directions.

[0024]

EXAMPLES Examples will be described with reference to the drawings.
In the figure, arrow F indicates the forward direction, and the left and right are displayed facing the forward direction. In FIGS. 1 and 2, the sled 2 is molded with a flat steel plate having a width of about 6 cm and a length of about 30 cm and an appropriate thickness, with its front portion concavely curved. A short projecting piece 7 projecting from the middle part of the sled 2 and a long projecting piece 8 standing upright obliquely rearward at the rear end part,
They are arranged in a line vertically with the same thickness.

The upper end portion of the short projecting piece 7 and the upper link 3
The upper end and the lower end of the front link 4 are pivotally attached 11 to the front end of the rear link 5, and the upper end and the lower end of the rear link 5 are respectively attached to the rear end of the upper link 3 and the lower end of the long protrusion 8. Pivot 11
Parallelogram link mechanism 1 with sled 2 as lower link
That make up the. The pivot 11 is a bolt / nut.

[0026] To prevent the roll of the parallelogram link Organization 1, front link 4 and the rear link 5, respectively upper link 3, on both sides of the short flange 7 and long protruding piece 8, made of a synthetic resin One by one is arranged through the anti-friction seat plate 12 (see FIG. 4). The front link 4 and the rear link 5 can be rocked back and forth around the bolts by the anti-friction seat plate 12 even when the nuts are tightened on the bolts of the pivotally attached 11.

Next, a tension coil spring 10 is stretched between the upper end of the long protruding piece 8 and the upper link 3, and the upper link 3 is pulled by using the long protruding piece 8 as a fixed point to pull the parallelogram linkage mechanism. Stand up 1. The long protrusion 8 also serves as the pivotal attachment 11 at the lower end of the rear link 5, but may be provided with only the tension coil spring 10. In that case, another short projection piece 7 is provided in front of the long projection piece 8 to form the parallelogram link mechanism 1. The upright parallelogram link mechanism 1 is inserted across the crop row.
The frame members 6 are horizontally installed on the left and right upper links 3 and are connected to each other with an appropriate interval. Left and right upper link 3 and Wakukin 6 may be integrally formed.

The suitable distance is about 25 cm between the inner edges of the sleds 2 and 2 so that the sleds 2 and 2 can slide on both sides of the crop. The height from the bottom surface of the frame 6 to the bottom surface of the sled 2 is about 28 cm in the standing state of the parallelogram link mechanism 1, and when the sleds 2 and 2 slide on both sides of the crop,
The frame 6 has such a height that it can pass above the crop.

Reference numeral 13 denotes a left and right parallelogram link mechanism 1
Is a vertical rod for attaching to the main body of the cultivator, and the base is fixed to the upper surface of the frame 6 by bolts and nuts 14, 14 and is erected vertically. The frame 6 is provided with an adjusting hole 15 so that the vertical rod 1
The position of 3 can be changed left and right. 9 is a long protruding piece 8
The projections provided on both sides of the intermediate portion (see FIG. 4) contact the back end surface of the rear link 5 to limit the rearward swing of the parallelogram link mechanism 1. The rear swing of the parallelogram link mechanism 1 restrictions, Ru also der in contact with the rear end face and the long front face of the protrusion 8 of the upper link 3.

Referring also to FIG. 3, the sleds 2, 2
The tine stoppers 16 are provided on the upper surface of the sled 2 so as to project from the front and middle portions of the sled 2, and the sleds 2 and 2 are opposed to each other in the left and right directions. The tine stopper 16 includes a female screw piece 17 having an insertion hole A formed obliquely outward with respect to the longitudinal centerline of the sled 2 in the middle portion thereof. As shown in FIG. Is screwed in until it reaches below the insertion hole A.

Reference numerals 19, 20 and 25, 26 denote left and right sickle blades with a long spring tine and a sickle blade with a short spring tine, respectively, which are curved in an arc shape in a plan view and from the front end horizontal portions 21 and 27 in a side view. At the ends of the long spring tines and the short spring tines that extend downwardly and gently downward, the blades are directed diagonally downward and the sickle blades 24 and 28 are respectively projected to one side in an obliquely backward shape toward the concave curved side of the bow. Left, the long spring tine with sickle blade 19 of the right and 20 and a short spring tine with sickle blade 25 and 26, their respective anti
It has the same shape as the opponent . Front end horizontal portions 21 and 27
Is a straight rod having a length of about 9 cm.

Then, the left and right sickle blades with long spring tines 19 and 20 are inserted into the tine insertion holes A of the front tine stopper 16 through the front end horizontal portion 21, and the left and right sickle blades with short spring tines are inserted. Similarly, insert the front end horizontal portion 27 into the tine stopper 16 of the intermediate portion by inserting 25 and 26 into the tine stopper 16.
8 and the left and right sleds 2, 2 are arranged symmetrically with respect to the center line of the facing interval, and the bases of the left and right long sickle blades 24 of the sickle blades are made to face each other with a small gap,
The sickle blade 28 of the sickle blade with a short spring tine is placed outside the front of the sickle blade 24 of the sickle blade with a long spring tine, and the respective sickle blades 24, 28 are arranged in the shape of a letter "H" in the forward lower direction of the sled. are doing. Since the tine stoppers 16 are provided on the front and middle portions of the sled 2, the sickle blades 25 and 26 with short spring tines are arranged outside the sickle blades 19 and 20 with long spring tines as shown in FIG. while being set, advancing locus of the tip of the proximal end and Kamaha 24 of sickle blade 28 is adapted duplicate.

The sickle blade 24 has a blade length of about 16 cm and a width of 2 c
m, the whole is shallowly concavely curved, and when passing under the surface of the ground, it passes above the roots of the crops and does not damage the crops. Further, the sickle blade 24 has its blade directed obliquely downward and downward in order to penetrate into the ground, but as shown in FIG.
The penetration angle α is 15 ° to 20 °. Sickle blade 2
No. 8 has a width of 2 cm and a blade length of about 18 cm, the whole is shallowly concavely curved, and the penetration angle is the same as that of the sickle blade 24.

The sickle blades 24, 28 may be at the same position (being the depth from the ground surface) in the lower rear part of the sled 2, but usually the soil surface lowers as the ground surface moves away from the plant base of the crop. Therefore, the sickle blade 28 is set lower than the sickle blade 24. When the cutting depth d from the ground surface GL on which the sled 2 travels is set to about 1 cm (see FIG. 2), the sickle blade 24 does not damage the lateral roots of the crop. Since the sickle blade 28 does not cut the crop by advancing to a position away from the plant base, it does not matter if the soil cutting depth is deeper than the sickle blade 24 .
Generally it is sufficient to approximately 4 cm lower position than Kamaha 24.

The sickle blades 19 and 20 with long spring tines and the sickle blades 25 and 26 with short spring tine respectively have long spring tine and short spring tine portions of a suitable thickness that is hard and elastic, such as a piano wire. It is made of wire. Long spring tine has a wire diameter of 4 m
m, the linear dimension from the front end to the terminal is about 36 cm.
The short spring tine has a wire diameter of 4 mm or 5 mm and a linear dimension from the front end to the terminal of about 16 cm.

As described above, the left and right long spring tine-equipped sickle blades 19 and 20 have the sickle blades 24 moved toward each other inward by the cutting resistance in the soil to enter between the plants and cut the weeds from the roots. The fact that the crop is not cut because it is inside the sickle blade 24 is the technique by which the weeding blade of the present invention enables inter-plant weeding. Therefore, the magnitude of the elastic value (spring constant) of the long spring tines is important. The wire diameter and length of the long spring tine described above were suitable as a result of various experiments. The right and left sickle blades 28 of the short blades 25 and 26 with spring tines are not related to weeding between plants, so that a large spring constant does not matter.

As shown in FIG. 9, the front end horizontal portions 21 and 27 have their upper surfaces cut into a plane a so that they do not rotate around the center of the cross section of the wire when they are fixed with set screws 18. desirable. This is due to the slight rotation of the front end horizontal portions 21 and 27, which causes the sickle blades 24 and 2 located at the rear.
This is because the underground cutting depth of No. 8 changes greatly.

FIG. 13 is a sickle blade 1 with a long spring tine.
9, 20 and the sickle blades 25 , 26 with short spring tines, the front end horizontal portions 21 and 27 are inserted into the tine insertion holes A of the tine stopper 16 and slid outward as indicated by the arrow. It is shown that the clearance C between the back surfaces of the bases of the blades 24, 24 is increased. Similarly, sickle blade 28, 2
8 Clearance also large Kikunaru between the base rear of. Although illustration is omitted, the clearance C is reduced by sliding in the direction opposite to the arrow.

Next, reference numerals 31 and 32 shown in FIG. 7 are long spring tines, and sickle blades 19 and 2 with long spring tines are provided.
The sickle blade 24 of No. 0 is used as the outward bending portion 33 with the wire material of the spring tine as it is. As shown in FIG. 10, the outward bent portion 33 is formed by cutting the upper and lower surfaces of the piano wire rod to form a wedge angle γ with respect to the front.
Set it to about 15 degrees and fix the front horizontal parts 21 and 27 with tine 16
When fixed to, the downward tilt angle β about 30 with respect to the horizontal plane HL
It turns to the front in degrees. This is suitable for early weeding in the germination stage, and the weeding action is the same as that of the above-mentioned known spring beach, except that the outward bent portion 33 is provided with a wedge angle which is a kind of blade.

FIG. 14 and FIG. 15 respectively show a sickle blade with long spring tine 22 and a sickle with short spring tine in which the front ends of the sickle blade 19 with long spring tine and the sickle blade 25 with short spring tine are ring portions 34, respectively. The blade 29 is shown. Although not shown, the front ends of the sickle blades 20 with long spring tines and the sickle blades 26 with short spring tines are also made into ring portions 34, respectively, and the sickle blades 23 with long spring tines and the sickle blades 3 with short spring tine 3 are provided.
Form 0. As shown in FIG. 16, these are attached and fixed to the sled 2 by tine stoppers 35 provided on the upper surface of the sled 2. The position of the tine stopper 35 is the same as that of the tine stopper 16 described above.

As shown in FIG. 17, the tine stopper 35 includes a nut 37 and a screw rod 36 vertically protruding from the upper surface of the sled 2.
Is screwed up and down, and the ring portion 34 is externally fitted together with the spring washer 38 to the screw rod 36 between the upper and lower nuts 37, and the upper and lower nuts 37 are fixed as lock nuts. That is, the ring portion 34 is attached to the upper and lower nuts 37, 3
The structure is such that it can be firmly tightened with 7, and can be tightly fixed by the action of the return elastic force of the spring washer 38.

In addition, the nut 37 on the upper side is loosened, and the sickle blade 22 with long spring tine and the sickle blade 2 with short spring tine 2 are attached.
When 9 is swung around the threaded rod 36 via the ring portion 34,
As shown in FIG. 16, the sickle blades 24 and 28 are set to desired positions, fixed again with the nuts 37 and 37, and the sickle blade 2 of the long spring tine-attached sickle blade 22 and the short spring tine-attached sickle blade 29 is attached.
It is possible to change the mounting relation positions of 4, 28. Further, the position of the lower nut 37 can be moved up and down in advance to adjust the mounting height of the front ends of the sickle blades 22 and 23 with spring tines and the sickle blades 29 and 30 with short spring tines. There is. That is, the cutting depth of the sickle blades 24, 28 can be adjusted by adjusting the mounting height of the front end portion.

Next, a device for holding the weeding blade body to the cultivator main body will be described. In FIG. 1, the lifting bracket 39 is screwed to the upper and lower ends of a pipe 40 which is fitted on the vertical rod 13 so as to be lifted and lowered. When the pipe 40 is fixed to the vertical rod 13 with the set screws 42, 42, one end of the pipe 40
The horizontal rod 41 horizontally protruding from the side surface is provided above the frame metal 6
It is configured to be parallel to 6 . Further, the transverse bracket 44 is provided with a set screw 42 screwed to both ends on the center line of the upper surface of the pipe 46 which is fitted onto the transverse rod 41 so as to traverse.
When the pipe 46 is fixed to the horizontal rod 41 at 42, the pipe 4
A vertical rod 45 erected on the upper surface of 6 is configured to be perpendicular to the horizontal rod 41 .

As shown in FIG. 4, the set screws 42, 42 are screwed into nuts 43, 43 fixed to the inner peripheral surfaces of both ends of the pipe 40, respectively.
They intersect each other with respect to the axis 0 of 0, and are juxtaposed perpendicularly to the axis of the pipe in a front view. The pipe 46
Set screws 42, 42 are also provided in the same manner.

In FIG. 1, reference numeral 47 is a known tool bar mounting member consisting of a main body 48, a pad 51 and a tightening screw / nut 52, and the main body 48 is provided with a socket portion 49 provided with a set screw 50. Toolbar mounting bracket 4
As shown in FIG. 1, 7 is attached to the tool bar 54, but if the form of the tool bar changes, an appropriate tool having a socket portion is selected.

FIG. 6 is a partially omitted plan view showing a state in which the weeding blade body is held and used in the tractor cultivator. In the figure, T is a tractor, 53 is a cultivator main body, and is connected to the tractor T via a three-point link hitch mechanism 55. Reference numeral 54 is a toolbar, 56 is a ruler wheel, and 57 is a beam for mounting the middle tillage claw 58 on the toolbar 54.

In order to hold the weeding blade on the cultivator main body 53, an elevating bracket 39 is attached to the vertical rod 13 of the frame 6.
The pipe 40 is externally fitted and fixed with a set screw 42, and then the transverse bracket 44 is externally fitted to the horizontal rod 41 of the elevating bracket 39 and fixed with the set screw 42. Then, the vertical rod 45 of the transverse bracket 44 is inserted from below into the socket portion 49 of the toolbar mounting bracket 47 mounted on the toolbar 54, and is fixed with the set screw 50.

For use in the field, the cultivator main body holding the weeding blade as described above is connected to the tractor T via the three-point link hitch mechanism 55. Then, the tool bar mounting bracket 47 is slid to the left and right with respect to the tool bar 54, and the center lines of the facing intervals of the left and right sleds 2 are fixed along the row of the crop S. At this time, when the tool bar mounting bracket 47 cannot be slid to an appropriate position due to the structure of the tool bar 54, the traverse bracket 46 is slid with respect to the traverse rod 41 of the elevating bracket 39 to bring it to an appropriate position.
On the other hand, the cultivator main body 5 is moved by the ruler wheel 56 that runs between the ridges.
3, the vertical rod 45 of the traverse bracket 44 is moved up and down with respect to the tool bar mounting bracket 47, and the raising and lowering bracket 39 is raised and lowered with respect to the vertical rod 13 to ground the left and right sleds 2 and the vertical rod. 45 and lifting bracket 3
9. Toolbar mounting bracket 47 and vertical rod 13 respectively
Fixed to.

Next, when the tractor T is moved forward, the left and right sleds 2 are moved by the parallelogram link mechanism 1 while individually adapting to the unevenness of the ground surface on both sides of the crop row. Along with this forward movement, the sickle blades 24, 24 of the long sickle blades 19 and 20 provided on the left and right sleds 2 enter between the plants and cut the weed w near the root without damaging the crops. As described above, the sickle blades 28, 28 of the sickle blades 25, 26 also cut the weeds w at positions away from the stock.

[0050]

EFFECTS OF THE INVENTION Since the present invention has the configuration described above, it has the following effects.

A parallelogram link mechanism is constructed by using the sled as a lower link, and this is elastically stretched by a tension coil spring stretched between the upper end of a long projecting piece standing upright at the rear of the sled and the upper link. By standing upright and juxtaposed to each other on the left and right side, and connecting them with a frame frame that was laid horizontally between the upper links, the left and right sleds are individually adapted to the unevenness of the ground surface on both sides of the crop row by the action of the tension coil spring. You can slide it. Te was therefore <br/>, long spring tine with sickle blade and the short spring tine with sickle blade which is provided between the inner sled mounted to a front end portion to the left and right of the warp, and adapt well to the surface of the uneven Weeds can be cut into the soil to cut weeds. Further, even if the sled is rapidly grounded on the ground surface, the tension coil spring absorbs the impact, so that damage to the weeding blade can be prevented.

In particular, the sickle blades with long spring tines in which the front end portions are attached to the tine stoppers on the front portions of the left and right sleds, and the sickle blades at the end portions are set to the lower rear of the sleds and arranged in a V shape in the forward direction, , If the crop rows are placed along the opposite center lines of the left and right sleds, as mentioned above, the cutting resistance of the sickle blades causes them to be displaced inward, and the left and right opposite sickle blades enter between the plants.
Weeds between plants can be cut. Also, when the base of the sickle blade passes through the plant base, the back surface of the base of the sickle blade opens outward due to contact with the plant base, allowing the crop to pass through. At this time, the crop is between the left and right sickle blade bases and is not cut by the sickle blade. That is, weeding between plants can be performed without damaging the crop.

In addition, the sickle blade with short spring tines, whose front end is fixed to the tine stoppers protruding from the middle of the left and right sleds, is arranged in front of and outside the sickle blade with long spring tines. Weeds at locations away from the root can be cut off near the root and weeded. Further, the sickle blade with a short spring tine swells the soil behind the sled by cutting in the soil, so that the soil can be prevented from being compacted.

The tine stopper projecting on the sled is provided with a tine insertion hole obliquely outward in the middle part of the female screw piece, and the set screw is screwed from the top surface to below the tine insertion hole,
By fixing the sickle blade with long spring tine and the sickle blade with short spring tine so that the upper surface of the front end horizontal part is flat and fixed in the insertion hole of the tine stopper so that the front end part can be retracted within the tine insertion hole. It can be made to not rotate around the heart. Therefore, it is possible to prevent the sickle blade from rotating around the tine axis and obstructing the cutting of weeds.
Also, by pushing the front end part out of the tine stopper and fixing it, it is possible to change the elasticity of the sickle blade with long spring tines, the sickle blade with short spring tines, and the opposite clearance on the back surface of the base of the sickle blades, so it can be used in field conditions. Correspondingly, the elasticity and the clearance can be adjusted to the appropriate ones.

Further, the front end of the sickle blade with long spring tines and the sickle blade with short spring tines is made into a ring portion, and a tine stopper is vertically screwed on the upper surface of the sled, and nuts are screwed up and down on the threaded rod. When the ring portion is fitted together with the spring washer on the screw rod between the upper and lower nuts and fixed by the upper and lower nuts, loosen the upper nut and rotate the ring portion around the screw rod, By fixing the nuts again, the relative positions of the left and right sickle blades can be changed. Furthermore, the height of the attachment position of the ring portion can be adjusted by moving the lower nut up and down. In other words, the relative position of the sickle blade with long spring tines and the sickle blade with short spring tines, and the cutting depth of the sickle blade can be adjusted appropriately according to the field conditions. Long sp
The sickle edge of the sickle blade with ring tines is the spring tine line
When the material end part is formed as an outward bent part,
We can provide a suitable product for early weeding in the germination stage.
It

[0056] The holding mounting herbicidal blade, a lift bracket vertically movable can be fixed to the longitudinal girder of the herbicide blade, it is possible to traverse securable next rod of the lift bracket, to install them toolbars mounting bracket to Calci beta body since those consisting of transverse bracket having a Tate杆inserted through the, preferred herbicidal action herbicidal blade to cultivators beta body
The left and right and up and down positions can be finely adjusted so that Further, even if the toolbar mounting bracket cannot be mounted at an appropriate position due to the structure of the toolbar, the horizontal bracket can be used to adjust the left and right positions. That is, it is possible to provide a holding device that can be widely applied to cultivator bodies of different types.

The set screws provided at both ends of the lifting bracket and the traverse bracket of the pipe are screwed onto the welded nut on the inner peripheral surface of the pipe to intersect the pipe axis, so that the vertical rod and the horizontal rod are fitted externally. Stop crossing the pipe
It can be fixed without rotating due to the pressing force of the screw . Also, since the nut is welded to the inner peripheral surface of the pipe, the screwing force of the set screw works so as to press the upper surface of the nut against the inner peripheral surface of the pipe, so that the welding of the nut does not peel off from the inner peripheral surface of the pipe. .

[Brief description of drawings]

FIG. 1 is a perspective view showing the structure of an embodiment of the present invention.

FIG. 2 is a right side view of a main part of the embodiment shown in FIG.

3 is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a front view of a vertical section taken along the line BB of FIG.

5 is an enlarged sectional view taken along the line CC of FIG.

FIG. 6 is a partially omitted plan view showing a usage state of the tractor cultivator.

FIG. 7 is a plan view of a main part to which a long spring tine according to another embodiment is attached.

FIG. 8 is an enlarged end view taken along the line D-D in FIG.

9 is an enlarged vertical sectional view taken along the line EE of FIG.

10 is an enlarged end view of the FF line vertical section of FIG. 7. FIG.

FIG. 11 is a right side view of a main part for explaining the operation of the sled.

FIG. 12 is a plan view of relevant parts for schematically explaining the operation of the sickle blade with long spring tines.

FIG. 13 is a plan view of a main part showing adjustment of a mounting state of a sickle blade with a long spring tine and a sickle blade with a short spring tine.

FIG. 14 is a plan view of another example of a sickle blade with long spring tines.

FIG. 15 is a plan view of another example of a sickle blade with a short spring tine.

FIG. 16 is a sickle blade with a long spring tine according to another embodiment,
The principal part top view which shows adjustment of the attachment state of the sickle blade with a short spring tine.

FIG. 17 is a vertical cross-sectional view of the main part of FIG. 16G-G line.

[Explanation of reference numerals] 1 parallelogram link mechanism 2 sled 3 upper link 6 frame metal 8 long protruding piece 10 tension coil spring 13 vertical rod 16, 35 tine stop 17 female screw piece A tine insertion hole 18, 42 set screw 19, 20 , 22, 23 Sickle blade with long spring tine 21, 27 Front horizontal part 24, 28 Sickle blade 25, 26, 29 , 30 Sickle blade with short spring tine 31 , 32 Long spring tine 34 Ring portion 36 Screw rod 37 Nut 38 Spring Washer 39 Lifting bracket 40, 46 Pipe 41 Horizontal rod 43 Nut 44 Traverse bracket 45 Vertical rod

[Procedure amendment 4]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

FIG.

[Procedure Amendment 5]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 3

[Correction method] Change

[Correction content]

[Figure 3]

Claims (5)

[Claims] 1. A parallelogram link mechanism (1) having a sled (2) as a lower link, the upper end of a long projecting piece (8) erected on the rear part of the sled (2), and the parallelogram link. Between the upper link (3) of the mechanism (1) and the tension coil spring (1
0) is stretched to stand upright, and these are juxtaposed laterally opposite each other with an appropriate interval, and a frame metal (6) is horizontally connected between the left and right upper links (3) to connect the frame metal ( The vertical rod (1
3) is erected vertically, and tine stoppers (16, 16) protruding from the upper surfaces of the front and middle portions of the sled (2, 2) are made to face each other, and the sickle blade (24) is provided on one side of the rear end. The left side of the arcuate curve that protrudes, the right sickle blade with long spring tines (19, 20) and the left side of the arcuate curve that protrudes the sickle blade (28) on one side of the rear end,
Attach the right short spring tine sickle blades (25, 26) to the front and middle tine stoppers (16) of the sleds (2, 2) with their front ends attached to the left and right sleds (2, 2).
2) are arranged symmetrically with respect to the center line of the inner facing interval, and the bases of the left and right sickle blades (24) of the sickle blades with long spring tines are opposed to each other with a small gap between them.
Set the right short spring tine sickle blade (28) to the front of the sickle blade (24) with the long spring tine.
A weeding blade for a cultivator in which the blades are arranged diagonally downward with respect to the forward direction behind the left and right sleds (2, 2) and arranged in a V shape. 2. A sickle blade (1 with left and right long spring tines)
9 and 20) and a sickle blade with short spring tines (25, 2)
6) forms the front end into front end horizontal portions (21) and (27) having a flat upper surface, and the tine stopper (16) is an intermediate portion of the female screw piece (17) projecting from the upper surface of the sled (2). A tine insertion hole (A) through which the front end horizontal parts (21) and (27) are inserted obliquely outwardly is provided in the part, and a set screw (18) is screwed downward from the center of the top of the female screw piece (17). The herbicidal blade for a cultivator according to claim 1, which is obtained by 3. Left and right long sickle blades with spring tines (2
2, 23) and sickle blade with short spring tines (29, 3)
0) has a front end portion formed in a ring portion (34), and a nut (37) is screwed up and down on a screw rod (36) vertically projecting from the front portion and the middle portion of the sled (2). The ring portion (34) and the spring washer (38) are externally fitted to the threaded rod (36) between the upper and lower nuts (37) of the tine stopper (35) which is attached to the upper and lower nuts (37). The herbicidal blade for a cultivator according to claim 1, which is fixed by. 4. A pipe (40) having a vertical rod (13) vertically erected on the upper surface of the frame (6), which is externally fitted to the vertical rod (13) so as to be vertically movable and has a horizontal rod (41) horizontally projected at one end thereof. , A lifting bracket (39) configured such that the horizontal rod (41) becomes parallel to the frame (6) when fixed by set screws (42) respectively screwed to the upper and lower ends of the pipe (40). , The horizontal rod (4
1) A pipe (46) having a vertical rod (45) vertically erected on the upper surface of a central portion, which is fitted to the pipe (46) in a transversely freely manner.
And a traverse bracket (44) fixed to the horizontal rod (41) of the elevating bracket (39) via set screws (42) screwed to both ends of the cultivator, respectively. 5. Nuts (43, 42) having the set screws (42, 42) fixed to the inner peripheral surfaces of both ends of the pipe (40) of the elevating bracket (39) and the pipe (46) of the traverse bracket (44), respectively. 43) The holding device for a cultivator herbicidal blade according to claim 4, which is screwed to the pipe 43 and slightly intersects with the axis of the pipe, respectively, and is arranged side by side orthogonal to the axis of the pipe in a front view.