JP4801459B2 - Tillage nail - Google Patents

Description

  The present invention relates to a tilling claw that is used by being attached to a tilling claw shaft of a rotary tilling device, and more particularly to a tilling claw suitable for scrubbing rice stock, straw, wheat straw, grass, etc. remaining in a field.

  The tilling claw is generally used for tillage work, and has a vertical blade portion and a horizontal blade portion continuously extending from a mounting base attached to the tilling shaft, and is opposite to the rotation direction from the vertical blade portion to the horizontal blade portion. And the horizontal blade portion is curved to one side.

  As shown in FIG. 3A (plan view) and FIG. 3B (side view), the tilling claw 70 described in Patent Document 1 called a so-called nata claw has a bending start line S of the horizontal blade portion 71. The position is formed so that the position is closer to the tip side with respect to the length from the center of the mounting base 3 to the tip of the horizontal blade portion 71, and the length (L 1) of the vertical blade portion 72 is the length of the horizontal blade portion 71. It is formed longer than that (L2). For this reason, side force is reliably supported while ensuring the vertical cutting depth of the soil by the vertical blade portion 72, and the embedding and release of the soil by the horizontal blade portion 71 are ensured. Further, since the radius of curvature R of the bent portion 71a that curves to one side of the horizontal blade portion 71 is small, even when the area of the rake face 73 of the horizontal blade portion 71 is small, the embedding of the soil is ensured, and the crossing load of the soil is small. As a result, the release of soil is ensured while reducing the tillage load. Thus, the tilling claw 70 is suitable for the tilling work.

Japanese Utility Model Publication No. 2-83701 (FIG. 7)

  However, if rice cultivars, straw, wheat straw, grass, etc. existing in the field are squeezed into the field by this conventional tillage nail, these squeezing becomes insufficient. This is because the tip bend height from the other side surface of the mounting base to the tip of the side blade part that curves to one side is low, so that some of the wrinkles and the like that exist in the field remain, and the side blade part is embraced by the side blade part Although the soil that has been squeezed moves over the scissors, etc., the radius of curvature of the side blades is small, so the amount of soil embedding by the side blades is reduced, and soot may be exposed. Because it is. 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 if this residue is not treated, the incineration process (field burning) of the residue will occur if smoke is generated. As a result, there is a problem that it spreads and adversely affects the surrounding environment.

  The present invention is desired to provide an environmentally-conserving tillage nail that reliably inserts residue such as straw into the field and does not adversely affect the surrounding environment. For the purpose.

  In order to achieve the above object, the tilling claw of the present invention has a vertical blade portion and a horizontal blade portion that continuously extend from a mounting base attached to the tilling shaft, and is opposite to the rotation direction from the vertical blade portion to the horizontal blade portion. In a tilling claw that is curved in the direction and the horizontal blade portion is bent to one side, the tip bend height from the other side surface of the mounting base in the plan view to the tip of the horizontal blade portion bent to one side is 100 mm or more The curvature radius of the bent portion curved to one side of the horizontal blade portion has a dimension substantially equal to the pre-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 200 mm, the pitch of the tilling nail attached to the tilling nail shaft is arranged at a pitch substantially equal to that of the rice strain and the axial direction of the tilling nail shaft If the curved directions of adjacent horizontal blades extend in the direction of each other, residues such as rice straw and straw that exist in the field can be surely squeezed into the field, and in the axial direction of the tilling nail axis. It is possible to prevent soil embrace where soil in the field is clogged between adjacent tilling claws. In addition, by setting the radius of curvature of the bent part curved to one side of the horizontal blade part to a dimension approximately equal to the pre-bending height, the rake angle is increased and the amount of soil embedding is increased, and this soil is absorbed. The residue portion is prevented from being exposed. For this reason, a residue can be infiltrated with high precision.

  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.

  According to the tilling nail 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 radius of curvature of the bent portion bent to one side of the side blade portion is substantially equal to the tip bend height. And the bending start position of the horizontal blade portion is located in the vicinity of 1/4 of the length from the center of the mounting base to the tip of the horizontal blade portion in a side view, closer to the mounting base side. Thus, it is possible to provide an environmentally-conserving tillage nail that does not adversely affect the surrounding environment.

  Hereinafter, the tilling nail | claw which concerns on this invention is demonstrated with reference to FIG.1 and FIG.2. The tilling claw of the present embodiment is used for a tractor-mounted side drive type or center drive type rotary tiller.

  As shown in FIG. 1A (side view), the tilling claw 1 includes a mounting base 3 having a mounting hole 3 a and a rectangular cross section, and a vertical blade portion 10 via a connecting portion 5 on the mounting base 3. And the side blade part 20 is formed continuously. The tilling claw 1 is attached to a claw holder 61 provided on the tilling claw shaft 60 by bolt fastening means or the like, and rotates in the direction of arrow A to perform the tilling work.

  The tilling claw 1 is curved in the direction opposite to the rotation direction from the vertical blade portion 10 to the horizontal blade portion 20, and the horizontal blade portion 20 is curved to one side (front side on the paper surface) with a substantially constant curvature radius R. A rake face 21 is formed. The pre-bending height H from the other surface of the mounting base 3 to the tip of the horizontal blade portion 20 curved to one side in a plan view is 100 mm or more (115 mm in the drawing), and is curved to one side of the horizontal blade portion 20. The radius of curvature R of the bent portion 20a has a dimension (120 mm in the drawing) substantially equal to the pre-bending height H. The tip bending height H is determined from the size of the tillage rotary on which the tilling claw 1 is provided, the length from the center of the mounting base 3 to the tip of the side blade 20 (the entire length of the claw), etc., and is 100 mm or more. The range of 150 mm or less is preferable.

  Thus, when the tip bend height H of the side blade portion 20 is set to 100 mm or more and the radius of curvature R of the bent portion 20a of the side blade portion 20 is set to a dimension substantially equal to the tip bend height H, FIG. ), The length B of one side of the soil embraced by the rake face 21 is larger than that of the above-described conventional tillage claw 70 indicated by a two-dot chain line (approximately in the drawing). Moreover, since the tip bend height of the horizontal blade portion 20 is also large (about 1.8 times in the drawing), the amount (volume) of embedding soil can be increased (about 3 times in the drawing).

  Further, residues such as wrinkles that are present within at least 100 mm on one side from the base of the horizontal blade portion 20 are surely scraped into the field by the horizontal blade portion 20. Furthermore, when the rice stock etc. which exist in a farm are planted with the pitch of about 200 mm, the pitch of the cultivation nail | claw 1 attached to the cultivation nail | claw axis | shaft 60 shown to Fig.1 (a) is arrange | positioned in the pitch substantially equivalent to that of a rice plant. Then, if the bending directions of the horizontal blade portions 20 adjacent to the axial direction of the tilling claw shaft 60 are directed to each other, residues such as rice straw and straw existing in the field can be surely poured into the field. In addition, it is possible to prevent the soil holding of the soil in the field between the tilling claws adjacent in the axial direction of the tilling claw shaft 60. In order to prevent holding the soil, the distance between the mounting bases of the tilling claws 1 adjacent in the axial direction of the tilling claw shaft 60 is set to an arbitrary size between about 180 mm and 200 mm, and the tilling claws 1 are tilled. You may attach to the nail | claw axis | shaft 60. FIG.

  As shown in FIGS. 1 (a) and 1 (b), blade edges 10b and 20b having substantially constant widths are formed on the front sides of the vertical blade portion 10 and the horizontal blade portion 20 in the rotational direction. . The cutting into the cultivated soil by the rotation of the tillage claw 1 in the direction of arrow A is performed from the blade edge 10b of the vertical blade 10 so that the side force is supported and at the same time the entanglement of weeds is prevented by the nail itself. Therefore, the blade edge portions 10b and 20b 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 20 is the attachment of the claw full length L when the length from the center of the attachment base 3 to the tip of the horizontal blade portion 20 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 1 can be made into the horizontal blade part 20 with good scuffing ability, and the tilling claw 1 suitable for scoring work can be provided.

  The tip 20c of the horizontal blade portion 20 is formed in an arc shape, the weight of the horizontal blade portion 20 is reduced, and the torque acting on the tilling claw 1 is reduced.

  As described above, the tilling claw 1 of the present invention sets the tip bend height of the side blade portion 20 to 100 mm or more, and sets the curvature radius R of the bent portion 20a curved to one side of the side blade portion 20 to the tip bend height H. By making the dimensions the same, the amount of residue such as reeds existing in the field and the amount of soil embedding increase, and the residue such as reeds can be surely included in the field. For this reason, it is possible to prevent the situation where the residue left in the field is incinerated and smoke and dust are generated and diffused to adversely affect the surrounding environment, contributing to environmental conservation agriculture. Can do.

[Example]
Length from the center of the mounting base 3 to the tip of the horizontal blade portion 20 (full length of the claw) L: 195 mm, bending start position P: 48 mm, radius of curvature R of the bent portion 20a curved to one side of the horizontal blade portion 20: 120 mm The bending angle ε of the horizontal blade 20 is 60 °, the forward speed V of the airframe equipped with the tilling claw 1 is 0.4 m / s, the rotation speed n of the tilling claw shaft 60 is 180 rpm, and the tilling pitch is 133 mm. When plowing work was performed in a field where cocoons and the like existed, it was confirmed that the cocoons and the like were satisfactorily inserted into the field.

The cultivation nail | claw concerning one embodiment of this invention is shown, The figure (a) is a side view of a cultivation nail, The figure (b) is a bottom view of a cultivation nail. It is the side view which showed the movement locus | trajectory of the tilling nail in order to explain the amount of soil holding by the horizontal blade part of the tilling nail. The conventional tilling nail is shown, The figure (a) is a top view of the conventional tilling nail, The figure (b) is a side view of the conventional tilling nail.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Tillage claw 3 Mounting base 10 Vertical blade part 20 Horizontal blade part 60 Tillage claw axis P Bending start position

Claims (2)

The blade has a vertical blade portion and a horizontal blade portion that continuously extend from an attachment base attached to the tilling claw shaft, and is curved in the direction opposite to the rotation direction from the vertical blade portion to the horizontal blade portion. In the tilling nail curved to the side,
The bend height from the other side surface of the mounting base to the tip of the horizontal 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 horizontal blade portion is the prebend A tilling nail characterized by having a dimension substantially equal to the height.   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 nail according to claim 1, wherein

Images