JP2007215467A - Power tiller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power tiller which can surely plow residues such as straws in a field. <P>SOLUTION: This power tiller 1 has a tillage rotor 10 having tillage tines 20 on a tillage tine shaft 11 extended in the horizontal direction and crossing the travel direction of a machine frame 2. Each of the tillage tines 20 has a vertical blade portion 23 and a lateral blade portion 25 continuously extended from an attachment base portion, and is curved from the vertical blade portion 23 to the lateral blade portion 25 in the direction opposite to a rotation direction. The lateral blade portion 25 is curved on one side. A tip curved height from the other side surface of the attachment base portion to the tip end of the lateral blade portion 25 curved on one side is ≥100 mm. The radius of curvature of the bent portion curved on one side of the lateral blade portion 25 has the approximately identical size to the tip curved height. A tillage tine 20 attached to the tillage tine shaft 11 at a position adjacent in the longitudinal direction of the tillage tine shaft 11 is disposed at a phase difference angle of 90° to another lateral blade portion 25 facing the lateral blade portion 25. The tillage tines 20 are spirally arranged in the longitudinal direction of the tillage tine shaft 11, and an overlapping width between the mutually facing lateral blade portions 25 is ≥1/2 of the tip curved height. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tilling device that performs a tilling operation while rotating a tilling rotor having a tilling claw, and in particular, to plow rice stock, straw, wheat straw, grass, etc. existing in the field into the field. It relates to a suitable tillage device.

  It is known that when cultivating rice plants, straw, wheat straw, grass, etc. existing in the field, these humus are promoted and a better soil is produced. If this scrubbing work is done manually, it is hard work, especially when the field becomes very large. For this reason, tillage devices have been developed that mechanize this plowing operation.

  As shown in FIG. 10A (side view), the tilling device 60 pivotally supports a tilling claw shaft 11 extending in the horizontal direction perpendicular to the traveling direction of the machine body, and the length direction of the tilling claw shaft 11 is. Flange-type claw mounting flanges 61 project in the radial direction from the same shaft circumferential surface at a plurality of predetermined intervals, and a tilling claw 62 having a vertical blade portion 63 and a horizontal blade portion 64 on the claw mounting flange 61. A pair of the blades 64 with the projection direction of the horizontal blade portion 64 facing outward and inward, each with a mounting angle (phase difference) of 180 °, are mounted in total, and two mounted on the adjacent claw mounting flange 61. A phase difference θ (34 ° in the drawing) is provided in the circumferential direction of the tilling claw 62 ′ and the tilling claw shaft 11 indicated by a chain line. The mounting angles α and β between the tilling claws having different protruding directions of the horizontal blade portion 64 of the tilling claws 62 are 73.6 ° and 106.4 °, respectively, and the tilling rotor 65 configured in this way is rotated once. FIG. 10B shows a development view of each tillage nail 62 driven in.

  Looking at the hatched portion of this driving development diagram as a representative, the tilling pitch of the tilling claws 62 facing the protruding direction of the horizontal blade portion is irregular as 108 °, 72 °, and 108 °. The cultivated soil becomes non-uniform, and the soil that moves on the residue such as the plowed soil becomes non-uniform so that the residue may be exposed. Therefore, if all the phase differences (lead angles) of the tilling claws with which the horizontal blades face each other are set to 90 ° so that the cultivated soil becomes uniform, the four tilling claws 62 are attached to the claw mounting flange. If the tilling claw 62 is arranged in a spiral shape in the length direction of the tilling claw shaft, the cultivated soil is biased to one side of the tilling rotor. Therefore, if the tilling claws 62 are arranged in a mountain shape that tends to be slightly inward with respect to the length direction of the tilling claw shaft, the required power and machine vibration of the entire rotor increase.

  In addition, the above-mentioned tillage rotor is cultivated in the rice harvesting field under the conditions that the forward speed of the aircraft is 0.42 m / s (1.5 km / hr), the rotation speed of the tillage claw shaft 11 is 157 rpm, and the tillage pitch is 159 mm. 11, as shown in FIG. 11, the gap between the tilling claws 62 and the tilling claws 62 becomes larger than the size of the rice stock 40 (for example, φ7 cm), and the paddy rice cannot be embedded with the cultivation claws. There is a problem that 40 remains on the field surface without being inverted.

  Therefore, it is conceivable to increase the rotational speed of the tilling rotor by shifting the PTO transmission so that the tilling pitch becomes narrower. However, when the rotation speed of the tilling rotor is increased, the load increases, so there is a limit to the speed increase. That is, at present, it is difficult to significantly reduce the tillage pitch (159 mm) under the above-described conditions.

  In addition, there is a gap between the tips of the tilling claws 62 driven in a direction transverse to the advancing direction of the machine body, or there is a gap between them, but the size of the overlap allowance is small. For this reason, the problem that a cocoon, a grass, etc. are easy to get entangled with a tilling nail axis arises.

  On the other hand, the tilling claw attached to the tilling rotor has a low pre-bending height from the other side surface of the attachment base to the tip of the side blade that curves to one side, so that some of the wrinkles and the like existing in the field are The rest of the soil released by the horizontal blade moves over the scissors, etc., but since the radius of curvature of the horizontal blade is small, the amount of soil released by the horizontal blade decreases. Etc. may be exposed. In addition, when a long vertical blade portion is stuck with a cocoon or the like and becomes a dango shape with the soil, the cultivation work itself may be impossible.

  As a result, residue such as straw remains on the surface of the field, and there are many cases where trouble is caused in subsequent work unless this residue is treated. Therefore, when the residue is incinerated (open burning) after the tilling work, there is a problem that smoke, dust, etc. are generated and diffused to adversely affect the surrounding environment.

  The present invention has been made in view of such problems, and the amount of cocoons and the like entangled with the tilling claw shaft is small, the required power and machine vibration of the entire rotor are small, and residues such as cocoons are surely removed in the field. An object of the present invention is to provide an environmental conservation type tillage device that does not adversely affect the surrounding environment.

  In order to achieve the above object, the tillage device of the present invention pivotally supports a tilling claw shaft extending in the horizontal direction perpendicular to the traveling direction of the machine body, and has a plurality of locations spaced at predetermined intervals in the length direction of the tilling claw shaft. In addition, in the tilling device equipped with the tilling claw having the vertical blade portion and the horizontal blade portion in the radial direction from the same shaft circumferential surface, the tilling claw has a vertical blade portion and a lateral portion extending continuously from the mounting base attached to the tilling nail shaft. A horizontal blade portion having a blade portion, curved in the direction opposite to the rotation direction from the vertical blade portion to the horizontal blade portion, the horizontal blade portion curved to one side, and curved from the other side surface of the mounting base to the one side. The tip bend height to the tip of the blade is 100 mm or more, the radius of curvature of the bent portion curved to one side of the horizontal blade portion has a dimension substantially equal to the tip bend height, and is mounted in the length direction of the tilling nail shaft. The tilling claw has a 90 ° phase difference angle with the other horizontal blades that are adjacent and facing each other. Te was placed, and characterized by being arranged in a spiral with respect to the longitudinal direction of the tilling claws axis.

  According to the present invention, by setting the tip bend height of the horizontal blade portion to 100 mm or more, residues such as wrinkles that are present at least within 100 mm from the base of the horizontal blade portion to the one side can be poured into the field. it can. In addition, when rice stocks etc. existing in the field are planted at a pitch of about 300 mm, the pitch of the tilling nail attached to the tilling nail shaft is arranged at a pitch approximately 2/3 of that of the rice strain and the axis of the tilling nail shaft When the bending direction of the horizontal blades adjacent to each other extends in the direction of each other, the tilling nail abuts on the residue such as rice stock and straw that exists in the field to ensure that the residue is poured into the field. Can do. In addition, by making the radius of curvature of the bent part curved to one side of the horizontal blade part approximately the same as the pre-bending height, the amount of erosion of the soil increases, and it moves onto the residue into which this soil has been incorporated. Thus, exposure of the residue portion is prevented. For this reason, a residue can be infiltrated with high precision. Further, the tilling nail mounted in the length direction of the tilling nail shaft is arranged with a phase difference angle of 90 ° with the other side blade part adjacent to the side edge of the nail, and the length of the tilling nail shaft is By arranging in a spiral with respect to the vertical direction, when the tilling claw shaft rotates, the tilling claws are uniformly driven into the field. For this reason, the cultivated soil becomes uniform, the power for rotating the cultivating rotor with the cultivating claw attached to the cultivating claw shaft and the vibration generated in the cultivating rotor can be reduced, and the residue can be uniformly poured into the field.

  The present invention also supports a tilling claw shaft that extends in a horizontal direction perpendicular to the traveling direction of the machine body, and radiates in a radial direction from the same shaft circumferential surface at a plurality of positions spaced in the length direction of the tilling claw shaft. In the tilling device equipped with a tilling claw having a vertical blade portion and a horizontal blade portion, the tilling claw has a vertical blade portion and a horizontal blade portion extending continuously from an attachment base attached to the tilling nail shaft, and the vertical blade portion From the side of the mounting base to the tip of the side blade curved from the other side of the mounting base to the tip of the side blade. 100 mm or more, the radius of curvature of the bent portion curved to one side of the horizontal blade portion has a dimension approximately equal to the prebend height, and the tilling nail mounted adjacent to the length direction of the tilling nail shaft is The blade part is arranged with a 90 ° phase difference angle with the other side blade part facing the blade part, and the length of the tilling nail shaft Together arranged helically relative direction, overlapping margin between Yokoha portion opposite to wherein there least 1/2 of the previous bending height.

  According to the present invention, by setting the tip bend height of the horizontal blade portion to 100 mm or more, residues such as wrinkles that are present at least within 100 mm from the base of the horizontal blade portion to the one side can be poured into the field. it can. In addition, when rice stocks etc. existing in the field are planted at a pitch of about 300 mm, the pitch of the tilling nail attached to the tilling nail shaft is arranged at a pitch approximately 2/3 of that of the rice strain and the axis of the tilling nail shaft When the bending direction of the horizontal blades adjacent to each other extends in the direction of each other, the tilling nail abuts on the residue such as rice stock and straw that exists in the field to ensure that the residue is poured into the field. In addition, it is possible to prevent soil clogging where soil in the field is clogged between tilling claws adjacent in the axial direction of the tilling claw shaft. In addition, by making the radius of curvature of the bent part curved to one side of the horizontal blade part approximately the same as the pre-bending height, the amount of erosion of the soil increases, and it moves onto the residue into which this soil has been incorporated. Thus, exposure of the residue portion is prevented. For this reason, a residue can be infiltrated with high precision. Further, the tilling nail mounted in the length direction of the tilling nail shaft is arranged with a phase difference angle of 90 ° with the other side blade part adjacent to the side edge of the nail, and the length of the tilling nail shaft is By arranging in a spiral with respect to the vertical direction, when the tilling claw shaft rotates, the tilling claws are uniformly driven into the field. For this reason, the cultivated soil becomes uniform, the power for rotating the cultivating rotor with the cultivating claw attached to the cultivating claw shaft and the vibration generated in the cultivating rotor can be reduced, and the residue can be uniformly poured into the field. Moreover, an overlap margin can be made into at least 50 mm by making the overlap margin of the opposing blade parts into 1/2 or more of the pre-bending height. For this reason, the hook etc. which are going to wind around a tilling nail | claw axis | shaft are removed by the rotating horizontal blade part, and the quantity which a hull | claw etc. wind around a tilling nail | claw axis | shaft can be decreased.

  Further, the bending start position of the horizontal blade portion of the present invention is ¼ of the total length of the claw closer to the mounting base side when the length from the center of the mounting base to the tip of the horizontal blade portion in the side view is the total length of the claw. It is located in the vicinity.

  According to this invention, when the bending start position of the horizontal blade portion is the length from the center of the mounting base to the tip of the horizontal blade portion in a side view as the total length of the claw, 1 / of the total length of the claw closer to the mounting base side. By locating in the vicinity of 4, most of the tilling claw can be made into a horizontal blade portion having a shape with high scuffing ability, and a tilling claw suitable for scoring work can be provided.

  Furthermore, in the present invention, four claw holders projecting radially are attached to the same shaft circumferential surface of the tilling claw shaft, and the other claw holder is offset with respect to one set of claw holders. It is characterized by being attached.

  According to the present invention, there are four claw holders projecting radially from the same shaft circumferential surface of the tilling claw shaft, and another set of claw holders is attached to the one of the claw holders. By attaching the offset in the length direction, the horizontal blades of the tilling nail facing each other adjacent to each other in the length direction of the tilling nail shaft are closer to each other, and the vertical blade of the tilling nail is placed on the rice stock, straw, etc. existing in the field Part or side blade part can be brought into contact. For this reason, the penetration property of a residue can be improved more.

  Further, the present invention is characterized in that the tilling claw shaft is provided with a claw mounting flange for mounting the tilling claw, and the claw mounting surface of the claw mounting flange is inclined with respect to the length direction of the tilling claw shaft.

  According to the present invention, the claw mounting surface of the claw mounting flange attached to the tilling claw shaft is inclined with respect to the length direction of the tilling claw shaft so that when the cultivation claw shaft rotates, The tip rotates while reciprocating in the length direction of the tilling claw shaft. For this reason, the horizontal blades of the tilling claws facing each other adjacent to each other in the length direction of the tilling claw shaft can be further approached, and the vertical blades or the horizontal blade portions of the tilling claws can be brought into contact with rice stocks, straws, etc. existing in the field. Can be reliably brought into contact with each other to further improve the penetration of the residue.

  According to the cultivator according to the present invention, the tip bend height of the side blade portion curved to one side is 100 mm or more, and the curvature radius of the bent portion curved to one side of the side blade portion is substantially equal to the tip bend height. A tilling nail mounted adjacent to the length direction of the tilling nail shaft is disposed with a phase difference angle of 90 ° with the other side blade portion facing the side blade portion, and Arranging spirally with respect to the length direction of the tilling nail shaft, and making the overlap margin between the opposing horizontal blade portions more than 1/2 the pre-bending height, the amount of wrinkles etc. entangled with the tilling nail shaft Therefore, it is possible to provide an environment-conserving tillage device that does not adversely affect the surrounding environment by reducing the required power and machine vibration of the entire rotor and reducing residue such as reeds into the field without fail.

  Hereinafter, the tilling nail | claw which concerns on this invention is demonstrated with reference to FIGS. Note that the cultivator of the present embodiment will be described by taking a tractor-mounted side drive type cultivator as an example. For convenience of explanation, the directions shown in FIG. 1A (side view) and FIG. 1B (plan view) will be described below as the front-rear direction and the left-right direction.

  As shown in FIGS. 1 (a) and 1 (b), the tillage device 1 is attached to the rear part of the traveling machine body 90 and proceeds with the traveling of the traveling machine body 90 to perform the tilling work. A main body frame 3 extending in the left-right direction, and a tilling rotor 10 pivotally supported between lower sides of the transmission case 5 and the support frame 6 disposed on both sides thereof are provided. The details of the tilling rotor 10 will be described later.

  A gear box 4 is provided at the center in the left-right direction of the main body frame 3, and the gear box 4 is provided with an input shaft 4a. Power is transmitted to the input shaft 4a from a PTO shaft (not shown) of the traveling machine body 90 via a transmission shaft (not shown).

  An upper cover 7 that extends in the front-rear direction and covers the top of the tilling rotor 10 is provided above the tilling rotor 10, and a leveling body 30 is attached to the rear end portion of the upper cover 7 so as to be rotatable in the up-down direction. . The leveling body 30 is plate-shaped, the front end side extends obliquely rearward, the front end part contacts the field surface, and the vertical position is adjusted via the vertical adjustment mechanism 8 attached between the main body frame 3 and the leveling body 30. Is possible. An extended leveling body 33 is attached to both left and right ends of the leveling body 30 so as to be rotatable in the vertical direction, thereby enabling the leveling width to be increased.

  The tilling rotor 10 includes a tilling claw shaft 11 that is pivotally supported between the lower side of the transmission case 5 and the support frame 6, and a plurality of locations spaced in the length direction of the tilling claw shaft 11 from the same shaft peripheral surface. It has the tilling claw 20 extended and attached to the radial direction. The tilling rotor 10 is configured to receive the power transmitted to the input shaft 4a described above and rotate via a power transmission mechanism (not shown) in the transmission case 5 or the like.

  As shown in FIG. 2 (cross-sectional view), FIG. 3 (a) (side view), and FIG. 3 (b) (bottom view), the tilling claw 20 has a mounting hole 21a and a rectangular mounting base 21. A vertical blade portion 23 and a horizontal blade portion 25 are continuously formed on the attachment base portion 21 via a connecting portion 22. The tilling claw 20 is attached to the claw holder 12 provided on the tilling claw shaft 11 by a bolt fastening means or the like, and rotates in the direction of arrow A to perform the tilling work.

  The tilling claw 20 is curved in the direction opposite to the rotation direction from the vertical blade portion 23 to the horizontal blade portion 25, and the horizontal blade portion 25 is curved to one side (front side on the paper surface) with a substantially constant curvature radius R. A rake face 26 is formed. The pre-bending height H from the other surface of the mounting base 21 to the tip of the horizontal blade portion 25 curved to one side is 100 mm or more (115 mm in the drawing), and the bent portion 25a curved to one side of the horizontal blade portion 25. Has a dimension (120 mm in the drawing) substantially equal to the pre-bending height H.

  As described above, when the tip bend height H of the side blade portion 25 is set to 100 mm or more and the radius of curvature R of the bent portion 25a of the side blade portion 25 is set to a dimension equivalent to the tip bend height H, FIG. 4 (side view). As shown in FIG. 4, the length B of one side of the soil radiated by the rake face 26 is larger than that in the case of a nail having a small curvature radius R indicated by a two-dot chain line (in the drawing, about 1.7 times) and the tip bend height of the horizontal blade portion 25 is also large (about 1.8 times in the drawing), so that it is possible to increase the amount of soil release (volume) (about 3 times in the drawing). Further, the horizontal blade portion 25 can surely scavenge residue such as wrinkles present within at least 100 mm on one side from the base of the horizontal blade portion 25 into the field.

  As shown in FIGS. 3A and 3B, blade edge portions 23 b and 25 b having a substantially constant width are formed on the front side in the rotational direction of the vertical blade portion 23 and the horizontal blade portion 25, respectively. The cutting into the cultivated soil by the rotation of the tilling claw 20 in the direction of arrow A is performed from the blade edge portion 23b of the vertical blade portion 23, so that the side force is supported and at the same time, the claw itself prevents entanglement of weeds and the like. Therefore, the blade edge portions 23b and 25b are formed so as to form an appropriate discharge angle.

  The bending start position P of the bending start line S of the horizontal blade portion 25 is the attachment of the claw full length L when the length from the center of the attachment base 21 to the tip of the horizontal blade portion 25 in the side view is the claw full length L. It is located near 1/4 near the base. In the drawing, L is 195 mm and P is 48 mm. Thereby, most of the tilling claw 20 can be made into the horizontal blade part 25 with good scuffing property, and the tilling claw 20 is suitable for scoring work.

  The distal end portion 25c of the horizontal blade portion 25 is formed in an arc shape, the weight of the horizontal blade portion 25 is reduced, and the torque acting on the tilling claw 20 is reduced.

  As shown in FIG. 2, the claw holder 12 for attaching the tilling claw 20 configured in this way is substantially the same in each of a plurality of places with a predetermined interval (180 mm in the drawing) in the length direction of the tilling claw shaft 11. Four protrusions are provided in the radial direction from the shaft peripheral surface. Each of these four claw holders 12 is mounted with a pair of tilling claws 20 that have the protruding direction of the horizontal blade portion 25 facing outward and inward, each with an attachment angle (phase difference) of 180 °. For this reason, since it arrange | positions so that the curving direction of the horizontal blade part 25 adjacent to the axial direction of the tilling nail | claw axis | shaft 11 may face each other direction, residues, such as a rice bran and a rice cake, which exist in a farm field, are ensured. In addition to being able to squeeze in, it is possible to prevent soil clogging with soil in the field between the tilling claws adjacent in the length direction of the tilling claw shaft 11. In order to prevent soil holding, the distance between the mounting bases of the tilling claws 20 adjacent to the length direction of the tilling claw shaft 11 is set to an arbitrary size between about 180 mm and 200 mm, and the tilling claws 20 are It may be attached to the tilling claw shaft 11.

  Further, the two sets of claw holders 12 are different from the one set of claw holders 12 in that the other set of claw holders 12 is A (drawn in the length direction of the tilling claw shaft 11 as shown in FIG. In this case, they are attached with an offset of 20 mm). Therefore, the four tilling claws 20 are not arranged on the same axis, but by bringing the tilling claws 20 with the horizontal blade portions 25 facing each other closer to each other at an interval A (20 mm in the drawing), The space between the tilling claws 20 adjacent to each other in the length direction can be narrowed, and the vertical blade portion 23 or the horizontal blade portion 25 of the tilling claws 20 is brought into contact with residues such as rice stock and straw at all locations in the field. Can be made. Further, the adjacent tilling claws 20 are arranged such that the overlap margin B between the opposing horizontal blade portions is equal to or greater than ½ of the pre-bending height (61 mm in the drawing).

  Further, as shown in FIG. 2, the cultivation claw 20 attached to the adjacent claw holder 12 with respect to the cultivation claw 20 attached to the two sets of claw holders 12, A phase difference (lead angle) of 35 ° is provided in the axial direction. At this time, the attachment angles between the claws in which the protruding directions of the horizontal blade portions 25 of the tilling claws 20 are different are 55 ° and 125 °, and the driving development views of the respective tilling claws 20 when the tilling rotor 10 makes one rotation are shown in FIG. As shown in FIG. As apparent from FIG. 6, the phase difference angles at which the horizontal blade portions 25 of the tilling claws 20 attached to the claw holder 12 adjacent to the length direction of the tilling claw shaft 11 face each other are 90 °. Further, the respective tilling claws 20 are arranged in a spiral shape with respect to the length direction of the tilling pawl shaft 11.

  The tiller rotor 10 configured in this manner is subjected to rice stubble farming under the conditions of a forward speed of the airframe 2 of 0.42 m / s (1.5 km / hr), a rotation speed of the tillage claw shaft 11 of 181 rpm, and a tillage pitch of 138 mm. FIG. 7 shows the action on the tilling pitch and the rice stock 40 when the tilling operation is performed. As clearly shown in this figure, the driving interval between the tilling claws 20 and the tilling claws 20 is smaller than the size of the rice stock 40 (φ7 cm in the drawing). For this reason, either the vertical blade portion 23 or the horizontal blade portion 25 of the tilling claw 20 always comes into contact with the rice stock 40, and the rice stock 40 can be cut and inverted to be embedded in the soil.

  As described above, the tilling device 1 of the present invention has the tip bend height of the horizontal blade portion 25 of the tilling claw 20 of 100 mm or more and the curvature radius R of the bent portion 25a curved to one side of the horizontal blade portion 25 is first. By making the dimensions approximately the same as the bending height H, the amount of residue such as cocoons remaining in the field and the amount of soil released increase, and the residue such as cocoons is surely removed in the field. Can be included. For this reason, it is not possible to plow, and it is possible to prevent a situation in which the residue in the field is incinerated after plowing and smoke or dust is generated and diffused to adversely affect the surrounding environment. It can contribute to conservation agriculture.

  Further, the tilling claw 20 mounted in the length direction of the tilling claw shaft 11 is arranged with a phase difference angle of 90 ° with the other side blade part which the side blade part 25 is adjacent to and opposed, and the tilling claw. By arranging the tilling claw shaft 11 in a spiral manner with respect to the length direction of the shaft 11, the tilling claw 20 is uniformly driven into the field. For this reason, the cultivated soil becomes uniform, and the power for rotating the cultivating rotor 10 and the vibration generated in the cultivating rotor 10 can be reduced, and the residue can be evenly swallowed.

  Moreover, an overlap margin can be made into at least 50 mm by making the overlap margin of the opposing blade parts into 1/2 or more of the pre-bending height. For this reason, the hook etc. which are going to wind around the tilling nail axis | shaft 11 are removed by the rotating horizontal blade part 25, and the quantity which a hull etc. winds around the tilling nail axis | shaft 11 can be decreased.

  The portion to which the tilling claw 20 is attached may be a plate-like claw attachment flange 50 attached to the tilling claw shaft 11 as shown in FIG. 8 (rear view). Further, as shown in FIG. 9 (rear view), the claw mounting flange 50 is mounted such that a claw mounting surface 50a serving as a side surface of the claw mounting flange 50 is inclined with respect to the length direction of the tilling claw shaft 11. May be. In this way, when the tilling claw shaft 11 rotates, the tip of the horizontal blade portion 25 of the tilling claw 20 rotates while reciprocating in the length direction of the tilling claw shaft 11. For this reason, the horizontal blade portion 25 of the tilling claw 20 adjacent to each other adjacent to the length direction of the tilling claw shaft 11 can be further approached, and the horizontal blade portion of the tilling claw 20 can be brought into contact with rice plants, straws, etc. existing in the field. 25 reliably contacts, and the penetration property of a residue can further be improved.

[Example]
Length from the center of the mounting base 21 to the tip of the horizontal blade portion 25 (full length) L: 195 mm, bending start position P: 48 mm, radius of curvature R of the bent portion 25a curved to one side of the horizontal blade portion 25: 120 mm The bending angle ε of the horizontal blade portion 25 is 60 °, the forward speed V of the tilling device provided with the tilling claw 20 is 0.4 m / s, the rotation speed n of the tilling claw shaft 11 is 180 rpm, and the tilling pitch is 133 mm. It was confirmed that when tillage work was performed in a field where cocoons and the like existed below, the cocoons and the like were satisfactorily inserted into the field, and there were few cocoons and the like entangled with the tilling claw shaft 11.

The tillage device concerning one embodiment of the present invention is shown, the figure (a) is a side view of the tillage device, and the figure (b) is a top view of the tillage device. Sectional drawing of the cultivation rotor provided in the cultivation apparatus is shown. The tillage nail | claw attached to a tilling rotor is shown, The figure (a) is a side view of a tilling nail, The figure (b) is a bottom view of a tilling nail. It is the side view which showed the movement locus | trajectory of the tilling nail in order to explain the amount of soil released by the horizontal blade part of the tilling nail. The rear view of a tilling rotor is shown. The driving | running | deployment development view by the tilling nail attached to the tilling rotor is shown. It is an expanded view which shows the effect | action to the cultivation pitch by a cultivation rotor and a rice stock. The rear view of other embodiment of a tilling rotor is shown. The rear view of other embodiment of a tilling rotor is shown. The conventional tillage rotor is shown, The figure (a) is a side view of the conventional tillage rotor, The figure (b) shows the driving | running development view by the tillage nail | claw of the conventional tillage rotor. It is an expanded view which shows the effect | action to the cultivation pitch and a rice stock by the conventional cultivation rotor.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cultivation apparatus 2 Airframe 11 Cultivation claw axis | shaft 12 Claw holder 20 Cultivation claw 21 Mounting base 23 Vertical blade part 25 Horizontal blade part 25a Bending part 50 Claw attachment flange P Bending start position

Claims (5)

A tiller shaft extending in the horizontal direction perpendicular to the traveling direction of the machine body is pivotally supported, and at a plurality of positions spaced at a predetermined interval in the length direction of the tiller nail shaft, a vertical blade portion radially from the same shaft surface and In a tilling device equipped with a tilling claw having a horizontal blade part,
The tilling claw has a vertical blade portion and a horizontal blade portion continuously extending from an attachment base attached to the tilling claw shaft, and is curved in a direction opposite to the rotation direction from the vertical blade portion to the horizontal blade portion. The horizontal blade portion is curved to one side, and a bend height from the other side surface of the mounting base to the tip of the horizontal blade portion curved to the one side is 100 mm or more, on one side of the horizontal blade portion Other horizontal blades having a radius of curvature of a curved bent portion having a dimension substantially equal to the pre-bending height, and the horizontal blade portion of the tilling nail mounted in the length direction of the tilling nail shaft facing each other. A tilling device characterized by being arranged with a phase difference angle of 90 ° with respect to the section and arranged in a spiral shape with respect to the length direction of the tilling claw shaft. A tiller shaft extending in the horizontal direction perpendicular to the traveling direction of the machine body is pivotally supported, and at a plurality of positions spaced at a predetermined interval in the length direction of the tiller nail shaft, a vertical blade portion radially from the same shaft surface and In a tilling device equipped with a tilling claw having a horizontal blade part,
The tilling claw has a vertical blade portion and a horizontal blade portion continuously extending from an attachment base attached to the tilling claw shaft, and is curved in a direction opposite to the rotation direction from the vertical blade portion to the horizontal blade portion. The horizontal blade portion is curved to one side, and a bend height from the other side surface of the mounting base to the tip of the horizontal blade portion curved to the one side is 100 mm or more, on one side of the horizontal blade portion Other horizontal blades whose horizontal blade portions are opposed to the tilling nail mounted adjacent to the length direction of the tilling nail shaft, the radius of curvature of the curved bent portion being substantially the same as the bending height. With a 90 ° phase difference angle and arranged in a spiral with respect to the length direction of the tilling claw shaft, and the overlap margin between the opposing horizontal blade portions is the pre-bending height. A tilling device characterized by being 1/2 or more.   When the length from the center of the mounting base to the tip of the horizontal blade is the full length of the claw, the bending start position of the horizontal blade is about ¼ of the total length of the claw closer to the mounting base. The tilling device according to claim 1, wherein the tilling device is located at a position.   Four nail holders projecting in the radial direction are attached to the same shaft peripheral surface of the tilling nail shaft, and one set of nail holders among these nail holders is the length of the tilling nail shaft. The tilling device according to any one of claims 1 to 3, wherein the tilling device is attached by being offset in a direction.   The claw mounting flange for mounting the tilling claw is provided on the tilling claw shaft, and the claw mounting surface of the claw mounting flange is inclined with respect to the length direction of the tilling claw shaft. The tillage apparatus in any one of.

Images