JP3856757B2 - Cultivator knife type weeding device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cultivator knife-type weeding apparatus for providing a cultivator with an underground cutting knife and a surface cutting knife, and particularly for weeding a plant that naturally grows without seeding.
[0002]
[Prior art]
For weeding work in field crops, it has been widely practiced to attach single and double wing weed blades called triangular blades to cultivators. The inventor of the present application has also devised a practical weeding blade 6-7029 (utility model registration No. 30144532) weeding blade. In this weeding blade body, a sickle blade is disposed outwardly through a desired gap at the lower end of the spring tine facing left and right, and the spring tine bends inward with advance, and the sickle blade is It enables root weeding. These conventional weeding blades are for weeding by cutting the topsoil shallow and horizontally, and not for cutting by underground cutting.
[0003]
[Problems to be solved by the invention]
When the previous crop is made in the field of potatoes, such as red beans, the field shoots of the potatoes before the germination of beans (Norabayae. A plant that grows naturally without seeding. Shogakuen, published in October 2001. (See Dictionary 2nd Edition, p868). The occurrence of this wild shoot grows in the fall of the previous year when a small potato falls to the ground with the soil from the gap between the lifting link rod conveyors of the potato harvester, and is covered with the soil over the years. Some of them are crushed, but many remain in the ground and germinate as wild seedlings.
[0004]
Stray shoots grow faster than beans and are taller. Therefore, it absorbs the nutrients and harms the sunshine, thus delaying the growth of the beans. The potato field growers can only be found after their leaves and leaves, and cannot be removed before they appear. In the past, there was no method other than removing the sprouted wild shoots by digging them with firewood or pulling them out manually, and removing this took a lot of time and effort.
[0005]
In view of the above circumstances, the present invention provides a cultivator knife-type weeding apparatus that can cut a stalk with a knife together with a cultivator's plowing work, and kill a common wild grower, such as a potato field grower. Providing is an issue to be solved.
[0006]
[Means for Solving the Problems]
The invention of claim 1 is a cultivator in which shanks equipped with middle tillers at the lower end are arranged in parallel on the left and right sides. A shank mounting body that moves forward and backward on the front and rear protrusions of the horizontal bars on the left and right sides and is fixed so that they can be freely fixed, and a cylindrical body with a set screw is fixed vertically to the side surface. A set screw in which the center line of the parallel opposite side of the octagonal steel shank and the longitudinal centerline thereof are orthogonal to the outer end of a rectangular flat plate fixed horizontally to the lower end surface of the octagonal steel shank that is pivotably inserted around the vertical centerline A weeding knife mounting body with a cylindrical body attached horizontally.
[0007]
The left and right sides are provided with heights that extend obliquely downward from the curved portion connected to the front lower portion of the upper horizontal portion and have a height that passes below the root portion of the grape crop when the blade portion is formed in the forward direction. The underground cutting knife is fixed by inserting the upper horizontal portion into a cylindrical body with a set screw of the weeding knife mounting body and obliquely moving backward.
[0008]
According to a second aspect of the present invention, the weeding knife attachment body is attached to the front and rear protrusions of the left and right horizontal bars, respectively, and the left side underground cutting is attached to the left front or rear weeding knife attachment body. Attach the knife, attach the right ground cutting knife to the right front or rear weeding knife attachment body, extend obliquely downward from the curved part connected to the front lower part of the upper horizontal part, each lower end part diagonally left Bends horizontally on the outside rear and diagonally right outside rear, with the front edge as the blade, and on the back, the left rear bent part and the right outer rear bent part projecting the vertical blade vertically along the forward direction The left-side surface cutting knife and the right-side surface cutting knife are slanted to the set screw cylindrical body of the weeding knife mounting body of the left side and right side horizontal bar to which the ground cutting knife is not mounted, and the horizontal bent portion at the lower end is slanted. And obliquely backward it is obtained by fixing inserting each said upper horizontal portion.
[0009]
【Example】
Embodiments of the present invention will be described below with reference to the drawings. In the following description, the left and right sides are displayed as viewed in the forward direction, GL in the figure is the ground surface, and arrow F is the display in the forward direction.
[0010]
FIG. 1 is a rear perspective view of a right main part of a cultivator 1 equipped with a first embodiment of the present invention. A tool bar 3 having a mast 2 connected to a hydraulic three-point support device of a tractor is attached to a tool bar 3 on the front side. A bracket 5 protrudes rearward through the metal fitting 4. A known automatic height adjusting device 6 is attached below the bracket 5, and a bone beam 7 is provided below the automatic height adjusting device 6 in parallel to the left and right along the advancing direction. Each has a ruler wheel 8.
[0011]
Reference numeral 9 denotes a slide shank having a square steel having a T-shape in a plan view and a square cross section. The slide shank 9 is slidably fitted in a socket 10 with a set screw fixed inside the central portion of the middle bone beam 7 and orthogonal to the middle bone beam 7. It protrudes inward. The left and right slide shanks 9, 9 are respectively provided with left shank 11 and right shank 12 with bolts and nuts attached to the inwardly projecting ends of the left and right shank 12, and lower end portions that are concavely curved forward. The middle tilling nail 13 is attached. The left-right spacing between the left and right shanks 11, 12 can be adjusted by moving the slide shanks 9, 9. Reference numeral 16 denotes a rear middle plow.
[0012]
FIG. 2 is a plan view of the main part of FIG. As shown in FIGS. 1 and 2, the left horizontal bar 14 and the right horizontal bar 15 are horizontally attached to the upper portions of the left shank 11 and the right shank 12 with bolts and nuts 40, respectively. Is forming. 3 and 4, 17 is a shank mounting body, which is slidably fitted to the left and right horizontal bars 14 and 15 and is fixed to one side surface of the frame body which can be fixed with a set screw 41. These are made of ductile cast iron in which a cylindrical body 24 with a set screw is integrally formed. In the cylindrical body 24 with a set screw, a set screw 42 with a lock nut is screwed in an upper portion along the front-rear direction, and a set screw 43 with a lock nut is screwed in a lower portion.
[0013]
The cylindrical body 24 with a set screw forms a round hole through which the octagonal steel shank 18 is slidable up and down along the vertical center line. The set screw 42 is provided along the front-rear direction, and a flat surface on one side of the octagonal steel shank 18 inserted through the round hole is tightened. The set screw 43 is tightened in contact with the angular ridge of the octagonal steel shank 18. The crossing angle α between 42 and 43 is 22.5 degrees (see FIG. 4). As shown in FIG. 4, the octagonal steel shank 18 has a distance between parallel opposite sides 30 and 31 of 22 mm. The octagonal steel shank 18 is obtained by quenching and tempering high carbon tool steel in order to withstand the moment generated by the left and right underground cutting knives 20 and 21 described later during underground cutting.
[0014]
Next, referring to FIGS. 2 to 4, reference numeral 19 denotes a weeding knife mounting body, and one end of a rectangular flat plate 25 having a thickness of 8 mm and a length of 50 mm is horizontally fixed to the lower end surface of the octagonal steel shank 18. A cylindrical body 26 with a set screw whose longitudinal center line is perpendicular to a center line that vertically crosses the parallel opposite sides of the octagonal steel shank 18 is fixed to the outer end of the rectangular flat plate 25 horizontally. The cylindrical body 26 with a set screw is provided with a round hole through which a left-side underground cutting knife 20 and a right-side underground cutting knife 21 to be described later are inserted, and two set screws 44 with lock nuts are provided on the upper surface. It is screwed.
[0015]
The shank attachment body 17 can slide back and forth on the left and right horizontal bars 14 and 15 to change the attachment position, and the weeding knife attachment body 19 attaches the octagonal steel shank 18 to the cylinder 24 with a set screw. By moving up and down, the ground height of the cylindrical body 26 with a set screw can be adjusted. The distance between the axis of the octagonal steel shank 18 of the weeding knife attachment body 19 and the center line of the round hole of the cylindrical body 26 with a set screw was set to 55 mm.
[0016]
Reference numeral 20 in FIG. 5 denotes a left-side underground cutting knife, which connects a curved portion 29 to the front lower portion of the upper horizontal portion 27 and extends obliquely downward from the curved portion 29 to form a blade portion 28 on the right end surface portion. . Reference numeral 21 in FIG. 6 denotes a right-side underground cutting knife, which connects a curved portion 29 to the front lower portion of the upper horizontal portion 27, extends obliquely downward from the curved portion 29, and forms a blade portion 28a on the left end surface portion. . The left and right underground cutting knives 20 and 21 have the same shape except that the blade portions 28 and 28a are the right and left sides, and the height from the horizontal extension surface of the upper horizontal portion 27 to the tip of the blade portion is 260 mm. The length in the direction is also 260 mm.
[0017]
The left and right underground cutting knives 20, 21 are rectangular as viewed from above, and the material is spring steel having a thickness of 6 mm and a width of 25 mm. Then, the upper horizontal portion 27 is inserted into the round hole of the cylindrical body 26 with a set screw, fixed with a set screw 44 with a lock nut, and attached to the weeding knife mounting body 19, and as shown in FIG. Each is attached to the horizontal bar 15.
[0018]
The left ground cutting knife 20 has an octagonal steel shank 18 fixed to a cylindrical body 24 with a set screw 42 by a set screw 42, and an angle formed by a longitudinal center line and a line along the forward direction F as shown in FIG. β is 45 degrees, and it is provided obliquely rearward with respect to the left horizontal bar 14. Similarly, the right underground cutting knife 21 is also provided obliquely rearward with respect to the right horizontal bar 15 (see FIG. 10).
[0019]
7 is a front view of FIG. 2 as viewed from the forward direction. As shown in FIG. 7, an octagonal steel shank 18 is inserted into a cylindrical body 24 with a set screw of a shank attachment body 17 attached to the left and right horizontal bars 14 and 15, and a weeding knife attachment body 19 is fixed at an appropriate ground level. is doing. Then, the upper horizontal portion 27 of the left ground cutting knife 20 and the right ground cutting knife 21 is inserted into the left and right cylindrical cylinders 26 with set screws, and fixed with set screws 44.
[0020]
The appropriate ground height of the weeding knife mounting body 19 is set so that the ground cutting depth of the left and right ground cutting knives 20 and 21 is about 15 cm. Further, when the left and right underground cutting knives 20, 21 are obliquely set rearward at an angle β of 45 degrees with respect to the forward direction, the upper horizontal portion 27 is moved back and forth with respect to the cylindrical body 26 with a set screw, They are attached so that the tips of their lower ends are located on the same line at the center of the furrow or intersect.
[0021]
FIG. 8 is a side view as viewed in the direction of the arrows in FIG. 2A-A schematically showing the working mode of the first embodiment. In FIG. 8, the right-side underground cutting knife 21 is fixed to a cylinder 26 with a set screw, and an octagonal steel shank 18 is fixed to the front protrusion 22 of the right horizontal bar 15 and a set screw cylinder 24 of the shank mounting body 17. It is fixed to. As described above, the right-side underground cutting knife 21 is disposed obliquely rearward with the blade portion 28a facing in the forward direction. P in the figure is a red bean, N is a wild potato, and FIG. 8 is a case where a middle tillage operation is performed when the root depth D2 of the red bean P is about 5 cm. Narasei potato N comes in various depths, but many are located deeper than the roots of red beans and have their foliage on the ground. D1 in FIG. 8 is the cutting depth of the right underground cutting knife of 15 cm.
[0022]
The left-side underground cutting knife 20 is similarly fixed to the front protruding portion 22 of the right horizontal bar 14 and is provided at an underground cutting depth of 15 cm. When the cultivator is advanced in this state, the left and right underground cutting knives 20 and 21 cut the soil on both sides of the red beans P at a depth of about 15 cm, and cut the roots of Nora and potatoes. If the roots are cut off, the potatoes will eventually die.
[0023]
In FIG. 2, the left ground cutting knife 20 and the right ground cutting knife 21 are attached to the front protrusions 22 of the left horizontal bar 14 and the right horizontal bar 15, but behind the left and right horizontal bars 14, 15. You may attach to the protrusion part 23. FIG. Alternatively, the left ground cutting knife 20 may be attached to the front protruding portion 22 of the left horizontal bar 14, and the right ground cutting knife 21 may be attached to the rear protruding portion 23 of the right horizontal bar 15. Good.
[0024]
FIG. 9 is a rear perspective view of the right main part of the cultivator 1 equipped with the second embodiment of the apparatus of the present invention, and FIG. 10 is a plan view of the main part of FIG. The cultivator 1 in FIG. 9 is the same as FIG. 9 and 10, in the second embodiment, the left and right underground cutting knives 20 and 21 in the first embodiment are attached to the front protrusions 22 of the left and right horizontal bars 14 and 15, respectively. A left surface cutting knife 32 and a right surface cutting knife 33 are attached to the right rear protrusion 23, respectively.
[0025]
Further, in the second embodiment, as shown in FIG. 11, when the left and right underground cutting knives 20, 21 are attached to the rear protrusions 23 of the left and right horizontal bars 14, 15, the left surface cutting knife 32 and the right surface knife 33 are attached to the front protrusion 22. Although not shown, if one of the left and right underground cutting knives 20, 21 is attached to the front protrusion 22, one of the left and right surface cutting knives 32, 33 is attached to the rear protrusion 23. It is.
[0026]
12 and 13 are perspective views of the left surface cutting knife 32 and the right surface cutting knife 33, respectively. Both the left and right surface cutting knives 32, 33 extend the curved portion 38 connected to the front lower portion of the upper horizontal portion 37 diagonally downward, and the left surface cutting knife 32 extends to the left in the traveling direction. The right surface layer cutting knives 33 are horizontally bent to the right in the advancing direction to form a left outer rear bent portion 34 and a right outer rear bent portion 35, respectively. Reference numeral 36 denotes a blade portion, which is formed on the left side of the left surface cutting knife 32 and the blade portion 36 a is formed on the right side of the right surface cutting knife 33. The rear bending angle of the left and right outer rear bending portions 34 and 35 is 135 degrees with respect to the advancing direction. Reference numeral 39 denotes a vertical blade, which protrudes downward along the forward direction from the back surface of the central portion of the left and right outer rear bent portions 34, 35, and has a lower edge and a front edge formed into a blade having a cross-sectional protrusion.
[0027]
14 is a side view taken along the line BB in FIG. 10, and FIG. 15 is a front view of FIG. 10 viewed from the forward direction. In FIG. 14, D1 is a cutting depth of the underground cutting knife of about 15 cm, and D3 is a cutting depth of the surface layer cutting knives 32 and 33 of about 4 cm. H is the height of the vertical blade 39 is 5 cm. The weeding knife mounting body 19 to which the left ground cutting knife 20 is fixed can be set to a desired ground cutting depth by loosening the set screws 42 and 43 and moving the octagonal steel shank 18 up and down relative to the shank mounting body 17. . The same applies to the right-side underground cutting knife 21. In the left surface cutting knife 32, the weeding knife mounting body 19 is mounted on the shank mounting body 17 mounted on the rearward projecting portion 23 of the left horizontal bar 14, and the upper horizontal section 37 is inserted and fixed to the cylindrical body 26 with a set screw. .
[0028]
When the set screw 44 is loosened, the left underground cutting knife 20 can be moved back and forth, and the cutting position of the left underground cutting knife 20 is adjusted. In other words, when the left underground cutting knife 20 is moved forward, the cutting position moves outward from the center of the heel, and when moved backward, it moves toward the center of the heel. The right underground cutting knife 21 adjusts the cutting position in the same manner.
[0029]
As shown in FIG. 15, the left and right surface cutting knives 32 and 33 have left and right outer rear bent portions 34 and 35 that move the weeds inside the left and right middle tillers 13 and 13 by the advance of the cultivator. It is scraped off nearby, and the vertical blade 39 performs the ground crushing action. 45 is the center line of the rod, and is fixed to the left and right weeding knife mounting bodies 19 so that the lower ends of the left and right underground cutting knives 20 and 21 advance below the rod center line 45. Yes.
[0030]
【The invention's effect】
As described above, according to the first aspect of the present invention, the ground under the straw crop can be cut from the ground surface by the left and right ground cutting knives, so that the field grower deep from the ground. The stems of potatoes and wild plants can be cut in the ground and killed. In addition, since the horizontal bar attached to the upper part of the left and right shanks to which the cultivator's middle tilling nail is attached has formed protrusions on the front and rear, the shank attachment body can be mounted on the front or rear of the horizontal bar, Left and right underground cutting knives can be provided at appropriate positions in front of or behind the middle tillage nail through a weeding knife attachment attached to the shank attachment.
[0031]
In addition, an octagonal steel shank is inserted into the left and right shank attachment bodies so that the height can be adjusted, and a weeding knife attachment body, in which a cylindrical body with a set screw is fixed horizontally at the lower end of the octagonal steel shank, is attached to the shank attachment body. Since the left and right underground cutting knives are attached to the cylindrical body with a set screw, the cutting depth of the underground cutting knife can be easily adjusted by a simple operation of vertically moving the octagonal steel shank. Further, since the weeding knife mounting body 19 is configured to push the plane of the octagonal steel shank inserted through the shank mounting body with a set screw, even if the ground cutting knife receives a large moment generated when cutting the ground, An underground cutting knife can hold the underground cutting knife without twisting.
[0032]
According to the invention of claim steel 2, since the surface layer cutting knife is arranged in front of or behind the left and right ground cutting knives, the ground surface near the tillage nail of the cultivator is shaved simultaneously with the ground cutting, As well as weeds and weeds, it is possible to obtain a ground breaking effect.
[Brief description of the drawings]
FIG. 1 is a rear perspective view of an essential part on the right side of a cultivator equipped with a first embodiment of the device of the present invention.
FIG. 2 is a plan view of an essential part of the first embodiment.
FIG. 3 is a front view of one part in FIG. 2;
4 is a plan view of FIG. 3;
FIG. 5 is a perspective view of the left underground cutting knife.
FIG. 6 is a perspective view of the right underground cutting knife.
7 is a front view seen from the forward direction of FIG. 2. FIG.
FIG. 8 is a side view as viewed in the direction of the arrows in FIG. 2A-A schematically showing the working mode of the first embodiment.
FIG. 9 is a rear perspective view of the right main part of the cultivator equipped with the second embodiment of the apparatus of the present invention.
10 is a plan view of the main part of FIG. 9;
11 is a plan view in which the attachment position of the cutting knife in FIG. 10 is changed.
12 is a perspective view of the left surface layer cutting knife in FIG. 9. FIG.
FIG. 13 is a perspective view of the right surface cutting knife.
14 is a side view taken along line B-B in FIG. 10;
15 is a front view seen from the forward direction of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Cultivator 11 Shank 12 Shank 13 Middle tillage 14 Left horizontal bar 15 Right horizontal bar 17 Shank attachment body 18 Octagonal steel shank 19 Weeding knife attachment body 20 Left underground cutting knife 21 Right underground cutting knife 22 Front protrusion 23 Back protrusion Part 24 Cylindrical body with set screw 25 Rectangular flat plate 26 Cylindrical body with set screw 27 Upper horizontal part 28, 28a Blade part 29 Curved part 30, 31 Parallel side 32 Left surface cutting knife 33 Right surface cutting knife 34 Left outer rear bent part 35 Right outer rear bent part 36.36a Blade part 37 Upper horizontal part 38 Curved part 39 Vertical blade F Forward direction

Claims (2)

In the cultivator in which the shank with the middle tiller nail attached to the lower end is arranged in parallel to the left and right, the left and right horizontal bars which are attached to the upper part of the left and right shanks to form the front and rear protrusions, and the left and right horizontal bars A shank mounting body that fits forward and backward on the front or rear protrusion of the tube and can be fixed freely, and integrally forms a cylindrical body with a set screw on the side surface, and pivots around the vertical center line to the set body with the set screw At the outer end of a rectangular flat plate that is horizontally fixed to the lower end surface of an octagonal steel shank that can be inserted freely, a cylindrical body with a set screw in which the center line of the parallel opposite side of the octagonal steel shank and its longitudinal center line are orthogonal to each other horizontally The attached weeding knife attachment body and the curved part connected to the lower front part of the upper horizontal part gradually extend obliquely downward and form the blade part in the forward direction. The upper horizontal portion is inserted and fixed to a cylindrical body with a set screw of the weeding knife mounting body, and the left and right underground cutting knives that are obliquely fixed backward are provided. Knife type weeding device for cultivators. The weeding knife attachment is attached to the front and rear protrusions of the left and right horizontal bars, respectively, the left ground cutting knife is attached to the left front or rear weeding knife attachment, the right front or rear The right ground cutting knife is attached to the weeding knife mounting body, extended obliquely downward from the curved portion connected to the front lower part of the upper horizontal part, and the lower end part thereof horizontally to the diagonally left outer rear and diagonal right outer rear, respectively. folding, the front edge and the blade portion, the left side surface cutting knife and right surface to form a left outer side back bent portion and the right outer back bent portion for projecting longitudinal edge vertically along the forward direction on the back surface The cutting knife is set to the set screw cylindrical body of the weeding knife mounting body on which the ground cutting knife of the left and right horizontal bars is not mounted, and the horizontal bent portion at the lower end is obliquely outward and rearward. Was inserted to fix the upper horizontal portion, cultivators base over data knives herbicides apparatus according to claim 1.

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