JP2008054695A - Tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tiller capable of plowing straw or the like into a deep position in the plowed soil. <P>SOLUTION: The tiller 1 is equipped with a puddling rotor 10 having a plurality of puddling tines 20 arranged on the outer periphery of a puddling shaft 11 supported so as to be freely rotatable at a prescribed interval, and extended in the outside in the radius direction of the puddling shaft 11. The puddling tine 20 has a first puddling tine 21 providing a circular locus having a prescribed rotation radius and drawn by the tip part, and a second puddling tine 31 having the rotation radius larger than that. The first puddling tine 21 and the second puddling tine 31 are arranged at the same position or so as to be adjacent at a prescribed interval in the puddling shaft direction. A straight blade extending in the direction nearly orthogonal to the puddling shaft 11 is installed in the puddling shaft 11 so as to have the rotation radius larger than that of the first puddling tine 21. A raking body 50 which extends in the rear direction of the puddling rotor 10 and of which the tip part is arranged within the width in the upper and lower direction of the rotation region at the outside of the rotation region of the puddling tine 20 is installed in the rear position of the puddling rotor 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a tilling device, and more particularly to a tilling device provided with a shaving rotor having a shaving claw used during shaving work.

  For paddy fields, paddy fields are used for paddy fields for the purpose of water retention, crushed soil, fertilizer mixing, leveling, weed control, and improved rice planting. This scraping work is also performed mechanically. For example, the scraping work is performed by a scraping rotor mounted on the rear portion of the tractor. A shaving rotor is configured by radially attaching a plurality of shaving claws having the same radius of rotation to a shaving shaft that is rotatably supported (see Document 1).

  This shaving rotor stirs the cultivated soil in the field by rotating the shaving claw and mixes it evenly. Have.

JP 54-15807 (page 1-2, Fig. 1)

  However, since the specific gravity of the straw that is squeezed into the cultivated soil is low, if the sledge is not squeezed deep into the lower part of the cultivated soil, the cocoon will float on the topsoil and may hinder rice planting work. .

  This invention is made | formed in view of such a problem, and an object of this invention is to provide the tilling apparatus which can plow a straw etc. in the deep position of the lower part in cultivated soil.

  In order to achieve the above object, a tilling device according to the present invention includes a shaving shaft that is rotatably supported, and a shaving shaft disposed on the outer periphery of the shaving shaft with a predetermined gap in the axial direction of the shaving shaft. In a tilling device provided with a shaving rotor having a plurality of shaving claws extending outward in the radial direction of the shaft, the shaving claws include a first shaving claw having a predetermined turning radius of a circular locus drawn by a tip portion and the first shaving claw. A second generation claw having a larger radius of rotation than the first generation claw, and the first generation claw and the second generation claw are arranged adjacent to each other at the same position or at a predetermined interval in the axial direction of the generation axis. The shaving shaft is provided with a straight blade having a turning radius larger than that of the first shaving claw and extending in a direction substantially perpendicular to the shaving shaft.

  According to the tilling device having the above-described configuration, a plurality of substitute shawls are disposed with a predetermined gap in the axial direction of the substitute shaft, and the substitute shawl includes a first substitute shawl having a predetermined turning radius and a turning radius larger than that. The second generation scratching claw has a large size, and the first generation scratching nail and the second generation scratching nail are disposed adjacent to each other at the same position or with a predetermined interval in the axial direction of the scratching shaft. The difference between the angular velocities of the tip portions of the adjacent first and second claw claws is that of the water flowing between the tip portions of the adjacent claw claws near the tip portion of the claw claw having the smaller rotation radius. The water pressure becomes larger than the water pressure in the vicinity of the tip of the scratching claw having a large turning radius. For this reason, the water which flows between the front-end | tip parts of an adjacent claw claw will produce a pressure difference in the upper side and the lower side, and will try to flow out below. As a result, when the cultivated soil is agitated by the substitute nail, the straw agitated with the cultivated soil is buried under the cultivated soil by the water flow flowing downward. For this reason, the reed can be inserted deep into the lower part of the cultivated soil. Further, by providing a straight blade with a rotation radius larger than the rotation radius of the first generation claw on the substitution shaft and extending in a direction substantially orthogonal to the substitution shaft, when the substitution blade is rotated, the straight blade becomes the substitution shaft. Rotating around the center of rotation, pressing the ridge downward, and scrubbing into the lower part of the cultivated soil. And if the front-end | tip part of a straight blade moves upwards from the perpendicular | vertical lower position of a shaving shaft, the pressing operation of the scissors by a straight blade will be cancelled | released. For this reason, a ridge can be forcibly embedded in the deep position of the lower part of cultivated soil with a straight blade, and the penetration property by which a ridge is squeezed into cultivated soil can be improved more.

  Moreover, in the tilling device having the above-described configuration, at least one of the plurality of first generation shaving claws and the second generation shaving claws arranged in the circumferential direction of the shaving shaft may be a straight blade.

  According to the tilling device having the above-described configuration, at least one of the plurality of first generation claw claws and second generation claw claws arranged in the circumferential direction of the substitution shaving shaft is a straight blade, so that the shaving shaft can be changed by the straight blade. The hook extending in the axial direction can be forcibly moved downward. For this reason, the penetration property to the cultivated soil of the straw by a shaving rotor can be improved more.

  Further, in the tilling device having the above-described configuration, a rake body may be provided at a rear position of the shaving rotor, extending to the rear side of the shaving rotor, and having a tip portion disposed within the rotation area vertical width outside the rotation area of the shaving claw. .

  According to the tilling device having the above-described configuration, the rake body that has been scraped into the cultivated soil by the substitute shaving claw is provided on the rear side of the substitute shaving rotor by providing the rake body with the tip extending within the vertical width of the rotation area outside the rotation area of the shaving claw. The rake body can be pressed onto the top of the. For this reason, it is possible to reliably bury the ridges squeezed into the cultivated soil at a deep position in the lower part of the cultivated soil.

  According to the tilling device according to the present invention, the substitute scratching claw has the first generation scratching claw having a predetermined rotation radius of the circular locus drawn by the tip portion and the second generation scratching claw having a larger rotation radius than the first generation scratching claw. The shaving claw and the second shaving claw are disposed adjacent to each other at the same position or with a predetermined interval in the axial direction of the shaving shaft, so that when the paddy paddy is scraped by the shaving rotor, the tip of the adjacent shaving claw The water flowing through the water flows downward due to the pressure difference between the upper side and the lower side, and plows the ridge into a deep position in the cultivated soil agitated by the shaving claw. In addition, by providing a straight blade having a rotation radius larger than the rotation radius of the first generation claw and extending in a direction substantially perpendicular to the substitution blade shaft, the straight blade can change the substitution shaft when the substitution blade rotates. Rotate as the center of rotation and plow the straw into the bottom of the cultivated soil. For this reason, a cocoon can be forcibly embedded in the deep position of the lower part of cultivated soil, and the penetration property to the cultivated soil can be improved more.

  Moreover, by making at least one of the plurality of first generation claw claws and second generation claw claws arranged in the circumferential direction of the shaving shaft into a straight blade, the hook extending in the axial direction of the shaving shaft by the straight blade is moved downward. It can be forcibly moved, and the penetration of the straw into the cultivated soil can be further improved.

  In addition, by providing a rake body with a tip extending in the vertical width of the rotation area outside the rotation area of the claw claw on the rear side of the crawler rotor, the rake body is pressed against the top of the ridge that has been squeezed into the soil by the claw claw. It is possible to reliably embed the ridges squeezed into the cultivated soil at a deep position in the lower part of the cultivated soil.

  Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1 (side view), a tilling device 1 according to the present invention includes a rotatable shaving rotor 10, a rake body 50 disposed on the rear side of the shaving rotor 10, and a rear side of the rake body 50. And a leveler 70 disposed on the side. The tilling device 1 is detachably connected to a rear portion of a tractor (not shown) at a front portion thereof, and the substitute rotor 10 rotates by receiving power supply from the tractor. In the cultivator 1, the tractor moves forward in a state where the substitute rotor 10 rotates, and substitutes the paddy field.

  The shaving rotor 10 includes a shaving shaft 11 that is supported so as to be rotatable in the horizontal direction, and is disposed on the outer periphery of the shaving shaft 11 with a predetermined gap in the axial direction of the shaving shaft 11. It has a plurality of shaving claws 20 extending outward. The substitute scratching claw 20 includes a first creation scratching claw 21 having a predetermined turning radius and a second creation scratching claw 31 having a larger turning radius than the first creation scratching claw 21. The first generation scratching claw 21 and the second generation scratching claw 31 are disposed adjacent to each other with a predetermined interval in the axial direction of the substitution scratching shaft 11. The first generation claw 21 and the second generation claw 31 are inserted into a mounting box 13 whose base end side is fixed to the outer periphery of the substitution shaft 11 shown in FIG. 2 and fixed by bolts 14 and nuts 15, and the distal end side is the substitution shaft. 11 radially outward. The first generation claw 21 and the second generation claw 31 that are adjacent to each other in the axial direction of the shaft 15 are arranged in a state of being shifted from each other at a predetermined angle in the circumferential direction.

  The rotation radii R1 of the circular locus drawn by the tips of the plurality of first generation shaving claws 21 disposed on the shaving shaft 11 have the same size, and the plurality of second generation shavings disposed on the shaving shaft 11 The rotation radius R2 of the circular locus drawn by each tip of the claw 31 is also the same size. For this reason, the second generation claw 31 arranged adjacent to the axial direction of the shaft 15 has a rotation radius R2 larger than the rotation radius R1 drawn by the tip portion of the first generation claw 21 and rotates. .

  Here, the flow of water W between the first generation claw claw 21 and the second generation claw claw 31 having different rotation radii will be considered. FIG. 3 (a) (side view) shows a state in which the substitute rotor 10 is installed in the paddy field and is rotated counterclockwise (arrow A direction), and FIG. 3 (b) (enlarged view) is shown. FIG. 4 is a model diagram showing a state equivalent to FIG. The model diagram shown in FIG. 3 (b) shows that the water W when the shaving rotor 10 is rotated is the water W when the water W flows forward from the rear side of the shaving rotor 10 in a stopped state. It is thought that it is the same as the flow of. Note that the flow rate of the water W flowing forward increases gradually from the upper side to the lower side. The reason why the flow rate of the water W is different between the vertical positions will be described later. Hereinafter, the flow of water W between the first generation claw 21 and the second generation claw 31 will be considered according to the idea of this model diagram.

  As shown in FIG. 2, when the shaving rotor 10 is installed in the paddy paddy field and rotated, the rotation radii of the first shaving claw 21 and the second shaving claw 31 adjacent to the left and right are different. The angular velocity of the tip end portion of the second generation claw claw 31 having a large radius is larger than that of the tip end portion of the first generation claw claw 21 having a small rotation radius. For this reason, the flow velocity of the water W flowing between the tip portions of the first generation claw 21 and the second generation claw 31 gradually increases as it goes downward. As a result, according to Bernoulli's theorem, the pressure P1 of water in the vicinity of the tip portion of the first generation claw 21 having a small rotation radius out of the water W flowing between the tip portions of the adjacent substitution claws 21 and 31 has a large rotation radius. It is considered that the pressure P1 is greater than the water pressure P1 near the tip of the second generation claw 31. For this reason, the water W which flows between the front-end | tip parts of an adjacent claw claw will produce a pressure difference in the upper side and the lower side, and will try to flow out below. In addition, the water between the tip portion of the first generation claw 21 having a small turning radius and the intermediate portion is also Bernoulli's as in the case of the water W flowing between the front end portions of the adjacent generation claw 21 and 31 described above. From the theorem, a pressure difference occurs between the upper side and the lower side, and it tries to flow downward. As a result, when the paddy rice paddy with the paddy B spread on the topsoil shown in FIG. 4 is scraped by the scraper rotor 10, the cultivated soil K is agitated by the plurality of scraper claws 20 and, as shown in FIG. The water W between the tip portion of the small first generation claw 21 and the intermediate portion flows downward, and further, this water W comes from the second generation claw 31 having a large turning radius and the first one having a small rotation radius. As described above, the water W flows into the claw claw 21 and further flows down due to a pressure difference between the upper side and the lower side of Bernoulli's theorem. For this reason, as shown in FIG. 4, the ridges B existing on the topsoil are embedded in the cultivated soil K that is moved and stirred along the flow of the water W, and further embedded in a deep position below the cultivated soil K. It is.

  Now, as shown in FIG. 2, in the circumferential direction of each position of the plurality of first generation claw claws 21 and the plurality of second generation claw claws 31 arranged in the axial direction of the substitution shaft 11, the arrangement is made at each position. A plurality of first generation scratching claws 21 and a plurality of second generation scratching claws 31 of the same type as the large scratching claws are provided. One of the plurality of first generation claw 21 and the plurality of second generation claw 31 disposed in the circumferential direction of the shaft 15 extends in a direction perpendicular to the shaft 15, and A straight blade 40 having a larger radius of rotation than the substitute shaving 21 is provided. As shown in FIG. 6A (front view), the straight blade 40 has an insertion hole 41 formed at the end on the base end side. The insertion hole 41 is a hole through which the bolt 14 inserted into the attachment box 13 is inserted into the insertion hole 41 in a state where the proximal end portion of the straight blade 40 is inserted into the attachment box 13 shown in FIG. The distal end side of the straight blade 40 extends in a direction perpendicular to the axial direction of the shaving shaft 11 shown in FIG. 2 and curves in the circumferential direction of the shaving shaft 11, and the distal end portion 40 a of the straight blade 40 moves toward the center O side of the insertion hole 41. It is formed in a straight line extending. As shown in FIG. 6B (side view), a pressing surface 42 that is pointed outward is formed at the outer end of the straight blade 40 on the front end side.

  Therefore, as shown in FIG. 2, when the shaving shaft 11 rotates in the direction of arrow A, the straight blade 40 rotates around the center axis of the shaving shaft 11, and the first shaving claw 21 and the second shaving claw The heel B located between 31 can be pressed downward. And when the front-end | tip part 40a of the straight blade 40 extended linearly shown to Fig.6 (a) moves to the position beyond just under the central axis of the shaving shaft 11, the press surface of the straight blade 40 shown in FIG.6 (b). 42 is released. For this reason, as shown in FIG. 6A, when the distance between the center O of the insertion hole 41 and the tip of the straight blade 40 is a distance R, the distance R is vertically downward from the center of the insertion hole 41. The heel B can be forcibly moved to the position it has. For this reason, the penetration property to the cultivated soil K of the ridge B by the scraper rotor 10 shown in FIG. 4 can be improved more.

  As shown in FIG. 1, a shield cover 60 that extends in the front-rear direction and covers the substitute rotor 10 is disposed above the substitute blade 10 configured as described above. An apron 62 is provided at the rear portion of the shield cover 60. The apron 62 has a proximal end pivotably pivotable in the vertical direction and extends rearward. The apron 62 is pivotally supported by a center pivot 63 provided at the rear portion of the shield cover 60 so as to be swingable in the left-right direction. The above-described leveler 70 is pivotally connected to the tip of the apron 62 so as to be swingable in the vertical direction. The power level of the leveler 70 is locked and released by a power operation mechanism (not shown). Put into a state.

  Between the substitute rotor 10 and the apron 62, the above-described rake body 50 having the first spring rake 51 and the second spring rake 55 is provided. The first spring rake 51 extends to the rear side of the scraper rotor 10, and the tip portion extends within the vertical width of the rotation area outside the rotation area D of the scraper claw 20. The first spring rake 51 has a rotation shaft 52 extending in the left-right direction at the upper end portion thereof, and a plurality of first rake bodies 53 extending obliquely downward to the rear side with a predetermined interval in the left-right direction. It is attached. The leading end of the first rake body 53 extends below the leveler 70. A pair of connecting arms 65 extending obliquely downward are attached to the left and right ends of the rotating shaft 52, and a link member 66 is pivotally connected between the tip of the connecting arm 65 and the apron 62. . Therefore, the first rake body 53 swings in the vertical direction in conjunction with the vertical swing of the apron 62, and the vertical position of the tip portion of the first rake body 53 can be adjusted. Note that the first rake body 53 may be fixed to the shield cover 60 and be in an unlinked state with the apron 62.

  Further, the second spring rake 55 extends to the rear side of the scraper rotor 10, and the tip end extends within the vertical width of the rotation area outside the rotation area D of the scraper claw 20. The second spring rake 55 has a fixed shaft (not shown) extending in the left-right direction at the upper end thereof, and a plurality of second rake bodies 56 extending obliquely downward to the rear side with a predetermined interval in the left-right direction on the fixed shaft. It is attached. Each of the plurality of second rake bodies 56 is disposed between the first rake bodies 53 adjacent in the left-right direction, and the tip of the second rake body 56 extends to a position below that of the first rake body 53. Yes. For this reason, the second rake body 56 extends in a direction intersecting the first rake body 53 in a side view. Similar to the first rake body 53, the second rake body 56 may be configured to be swingable in the vertical direction in conjunction with the vertical swing of the apron 62.

  A plate-shaped shielding plate 73 extending in the left-right direction is attached to the lower side of the upper portion of the first spring rake 51. The shielding plate 73 is disposed at a position near the rotation area D of the shaving claw 20, and the lower side is formed along the plurality of first rake bodies 53.

  In order to perform a shaving operation with the tiller 1 configured as described above, as shown in FIG. 1, the tiller 1 is attached to the rear of a tractor (not shown), and the tiller 1 is moved to the paddy field. Then, the tractor is driven to rotate the substitute rotor 10 of the tilling device 1 in the direction of arrow A, and the tractor is moved forward. When the substitute rotor 10 rotates, as shown in FIG. 4, the tillage claw 20 stirs the cultivated soil K, and the straw B existing on the topsoil is scraped into the agitated cultivated soil K. Here, when the shaving rotor 10 rotates, as shown in FIG. 5, the water W located between the tip of the first shaving claw 21 having a small turning radius and this intermediate portion is A pressure difference occurs between the upper side and the lower side, and flows downward. As a result, the heel B pushed into the water W moves to the tip end side of the first generation claw 21. The water W flowing downward flows between the first generation claw 21 and the tip of the second generation claw 31 adjacent thereto, and a pressure difference is generated between the upper side and the lower side according to Bernoulli's theorem. And flow down further. For this reason, heel B moves further downward. That is, the ridge B is embedded in a deep position below the stirred cultivated soil K, as shown in FIG. As a result, the straw B can be scooped into a deep position of the stirred cultivated soil K.

  The ridge B scooped into the deep position of the cultivated soil K is pressed from above by the first spring rake 51 and the second spring rake 55 disposed on the rear side of the shaving rotor 10, and the lower part in the cultivated soil K It is surely inserted into the deep position. In addition, since the first rake body 53 and the second rake body 56 are disposed in a direction that is inclined obliquely downward and intersects in a side view, the flow of the kite B fed rearward from the scraper rotor 10 Is on the lower side, and can improve the penetration of ridge B.

  Further, as shown in FIG. 1, the water W in the field carried upward by the substitute rotor 10 contacts the shielding plate 73, changes its direction, and flows downward. As a result, it is possible to prevent the cultivated soil K and the straw B that are stirred by the scraper rotor 10 from being dragged upward along with the rotation of the scraper rotor 10, and to prevent the penetrability of the scraper B from being lowered. Further, the cultivated soil K 'carried around below the shielding plate 73 can be deposited, and the agitated cultivated soil K that follows can be flowed below the cultivated soil K'. For this reason, it is possible to improve the leveling of the surface of the farmed field.

  In the above-described embodiment, the case where the shaving claw 20 is constituted by two types of the first shaving claw 21 and the second shaving claw 31 is shown, but the present invention is not limited to this. As long as the rotation radii of the shaving claw 20 adjacent in the axial direction are different, the shaving claw 20 may be composed of three or more types. Further, the straight blade 40 shown in FIG. 2 has a rotation radius larger than the rotation radius of the first generation claw 21, but may be larger than the rotation radius of the second generation claw 31.

  Further, a straight blade 40 is provided instead of the second generation claw 31 shown in FIG. 2, and the straight blade 40 provided at a position shifted in the circumferential direction of the arrangement shaft 11 from the position where the first generation claw 21 is attached is the first. It may be a first generation nail 21. That is, a plurality of first shaving claws 21 are provided with a predetermined gap in the circumferential direction of the shaving shaft 11, and a plurality of straight blades 40 are provided with a predetermined gap in the circumferential direction of the shaving shaft 11. A plurality of first shaving claws 21 arranged in the above and a plurality of straight blades 40 arranged in the circumferential direction may be arranged with a predetermined interval in the axial direction of the shaving shaft 11. In this case, the turning radius of the tip of the straight blade 40 is made larger than that of the first generation claw 21. Further, the first generation claw 21 and the second generation claw 31 may be disposed at the same position in the axial direction of the shaft 15 with a predetermined gap in the circumferential direction. By constituting in this way, the same effect as the case where the 1st generation shaving claw 21 and the 2nd generation shaving claw 31 are arranged in the axial direction of the shaving shaft 11 can be acquired.

The side view of the tilling device concerning one embodiment of the present invention is shown. The front view of the shaving rotor of this tillage device is shown. The figure for demonstrating operation | movement of a shaving claw is shown, The figure (a) is a side view of a shaving rotor, and the figure (b) is an enlarged view of a shaving claw. The side view of the tillage device for demonstrating operation | movement of a shaving rotor is shown. The operation | movement explanatory drawing for demonstrating the operation | movement of a substitute nail | claw is shown. A tilling nail is shown, the figure (a) is a front view of a tilling nail, and the figure (b) is a side view of a tilling nail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Plowing device 10 Generation shaving rotor 11 Generation shaving shaft 20 Generation shaving claw 21 First generation shaving claw (Drawing claw)
31 Second generation of nail
40 Straight blade 50 Rake body

Claims (3)

A shaft shaft that is rotatably supported, and a plurality of shaft shafts that are arranged on the outer periphery of the shaft shaft with a predetermined gap in the axial direction of the shaft shaft and extend radially outward of the shaft shaft. In a tillage device equipped with a shaving rotor made of
The above-mentioned scratching nail has a first scratching nail having a predetermined turning radius of a circular locus drawn by a tip portion and a second scratching nail having a larger turning radius than the first scratching nail,
The first generation scratching nail and the second generation scratching nail are disposed adjacent to each other at the same position or a predetermined interval in the axial direction of the substitution scratching shaft,
The tilling shaft is provided with a straight blade having a rotation radius larger than that of the first generation shaving claw and extending in a direction substantially perpendicular to the shaving shaft.   2. The tillage device according to claim 1, wherein at least one of the plurality of the first generation claw and the second generation claw arranged in a circumferential direction of the shaft is the straight blade.   The rake body is provided at a rear position of the shaving rotor, and is provided with a distal end portion disposed within a vertical width of the rotation area outside the rotation area of the shaving claw, extending to the rear side of the shaving rotor. The tillage device according to 1 or 2.

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