JPH0733603Y2 - Claw forming claw - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to improvement of a tilling claw used by being mounted on a rotary tiller.

(Prior Art) Conventionally, as tilling claws mounted on a rotary tiller and used, for example, Japanese Utility Model Publication No. 36-9206 and Japanese Utility Model Publication No. 39-16404.
No., Jikkō Sho 13-13610, Jikkou Sho 64-6001 and Jikkai Sho 6
There is one such as that described in Japanese Patent No. 2-15022.

That is, the one disclosed in Japanese Utility Model Publication No. 36-9206 is configured by providing a specially-shaped slime on the side surface of the main body excluding the base and blade edge of the tilling claw to reduce the weight and reduce the friction resistance with the soil. You can do it.

In Japanese Utility Model Publication No. 39-16404, the tip of the vertical blade portion provided with the blade portion on the convex edge side and the concave edge side that are curved is laterally twisted to form a triangular horizontal blade portion, It is configured by providing an inclined blade on the edge ground contact side, and by appropriately selecting and mounting the bending direction of the plowing blade in the same or opposite direction with respect to the rotation direction of the plowing shaft depending on the soil quality, the plowing soil can be smoothed. To be able to do.

In Japanese Utility Model Publication No. 40,13610, the tip of the lower plowing blade attached to the lower end of the plowing blade is bent to form a refraction piece, and the refraction piece is gradually widened toward the tip. It is configured to be able to improve the plowing capacity.

In Japanese Utility Model Publication No. 64-6001, there is a slanted shape near the base of the installation, and while bending sideways so as to gradually move away in the direction orthogonal to the center line of the tilling axis, the soil bends as it goes toward the soil The blade part is constructed so that both sides are in contact with soil, so that waste straw or residual rods can be effectively driven into the cultivated soil.

In Japanese Utility Model Publication No. 62-1502, the vertical blade portion is curved so that the bending angle gradually increases from one side of the vertical blade portion toward the tip side, and the bending angle is further increased from the tip portion of the vertical blade portion. While curving in the same direction to form the horizontal blade, and the horizontal blade is twisted so that the outer peripheral edge side is closer to the vertical blade side on the curved surface than the ridge side, improving soil crushing performance. You can do it.

(Problems to be solved by the invention) By the way, in the case of cultivating, especially in rice cultivation, in order to keep the water depth constant at the time of rice planting, the tiller after plowing the soil is formed horizontally with respect to the gravity direction. It is desirable to be done.

However, with the conventional tillage claw, although it is possible to reduce the tilling resistance and improve the performance of the tilled soil, the tiller after plowing cannot be formed horizontally with respect to the direction of gravity.

Then, this invention aims at provision of the tiller shaping | molding nail which can press the tiller after plowing in the gravity direction.

[Means for Solving the Problems] (Means for Solving the Problems) In order to solve the above problems, the present invention is directed toward the bottom of a vertically elongated rectangular base mounted on a tilling shaft, in the same plane, so that the tip is continuously cultivated. The arc-shaped vertical blade with the blade edge only on the convex side is formed by curving in the lateral direction so that the radius of gyration about the axis becomes large and the width becomes wide. From the center of the blade edge side to the tip side, with respect to the surface, a roughly triangular pressing blade part for pressing the soil extended along the rotation direction by bending at an obtuse angle α close to a right angle out of the plane. The bent line is formed so as to intersect the straight line passing through the center of the tilling axis at a right angle at the center of the bent line.

(Operation) According to the above configuration, the lower surface of the pressing blade portion of the tilling claw presses the cutting soil surface in the gravity direction with respect to the cutting progress direction.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a plan view of a plow forming pawl according to an embodiment of the present invention, and FIG. 2 is a sectional view taken along the line II-II of FIG.

The tiller forming claw 1 includes a base 3 for fitting into a holder hole 25 of a claw holder 23 of a tiller shaft 21 supported by a tiller (not shown), and a cutting blade 5 for cutting and raising soil. Are integrally formed in the same plane.

The cutting blade body 5 has a vertical blade portion 7 that is curved and formed with a radius R so as to have a receding angle with respect to the rotation direction of the tilling claw 1, and the vertical blade portion 7 extends from approximately the center to the tip. A pressing blade portion 9 bent at an obtuse angle α close to a right angle is continuously provided outside the plane along the claw rotation direction. The bent pressing blade portion 9 has a substantially triangular shape. Also, the bending line is the tilling axis.
It is formed so that it intersects with a straight line passing through the center 0 of 21 at the center of the bent line. The vertical blade portion 7 is longer than a conventional nail, the rake face has a wide width, and the angle α of the tilling portion is large.

One side of the inner peripheral surface 9a of the pressing blade portion 9 and the vertical blade portion 7 connected to the inner peripheral surface 9a is a blade edge 11 forming a single blade,
The opposite side is the back edge 13. And the blade edge 11 and the back edge 13
The width between and is gradually increased from the vertical blade portion 7 to the pressing blade portion 9 by B
It is formed so as to be wide (in the development view).

Next, the operation of the plowing claw 1 according to the above-described embodiment will be described.

When the tiller shaft 21 rotates in the direction of arrow a and the tiller claw 1 cuts into the soil, the blade edge 11 on the base 3 side of the vertical blade portion 7 cuts into the soil, and the blade increases as the rotation angle of the tiller claw 1 increases. The length of the edge 11 cut into the soil gradually increases. Then, the pressing blade portion 9 cut into the soil following the cutting of the vertical blade portion 7 cuts the soil toward one side of the vertical blade portion 7 by the blade edge 11, and further the pressing blade portion 9 The soil cut on the inner peripheral surface (upper surface) 9a is continuously inverted and moved, and the outer surface (lower surface) 9b continuously presses the cultivated soil surface, which is the cultivated soil surface with respect to the direction of gravity. Formed horizontally. In the above embodiment,
Since the angle at which the bending line of the pressing blade portion 9 intersects with the straight line passing through the center 0 of the tilling shaft 21 at the center and the bending angle α are both 90 degrees or close to this, reversal movement and pressing of the cutting soil are effective. To be done.

In this way, since the cultivated plow is formed horizontally, the depth of water in the rice planting operation can be kept constant, so that the rice transplanter can run stably and the planting of seedlings can be stabilized. At the same time, planting with equal depth can be performed.
Further, since the cultivator is continuously solidified on the outer peripheral surface 9b of the pressing blade portion 9, the underground penetration of water and fertilizer is prevented.

3 and 4 show another embodiment of the present invention. The same elements as those in FIGS. 1 and 2 are designated by the same reference numerals, and duplicate description will be omitted.

In this embodiment, the pressing blade portion 9 is formed with a gentle concave portion 15 toward the back edge 13 side.

Therefore, since the same effect as that of the above-described embodiment is obtained, the tilling resistance can be further reduced.

[Effect of the Invention] As is apparent from the above description, according to the configuration of the present invention, the tiller after plowing can be pressed by the lower surface of the pressing blade portion. Therefore, it is possible to prevent the infiltration of water and fertilizers underground when rice is grown.

Further, the depth of water can be kept constant, the traveling of the rice transplanter or the like is stabilized, the planting of seedlings is stabilized, and the planting of equal depth can be performed.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of a plow forming pawl according to an embodiment of the present invention, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, and FIG. FIG. 4 is a plan view of a plow forming pawl according to another embodiment, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. 1 …… Cultivator claw 3 …… Base 7 …… Vertical blade 9 …… Pressing blade 21 …… Tillage shaft

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP 62-257304 (JP, A) Actual development 49-87802 (JP, U) JP 36-19701 (JP, B1)

Claims (1)

[Scope of utility model registration request] 1. A bottom end of a vertically long rectangular shape attached to a cultivating shaft, so that the radius of gyration about the cultivating shaft becomes larger and the width becomes wider toward the tip continuously in the same plane. To form an arcuate vertical blade having a blade edge only on the convex side by bending it in the horizontal direction, and at a right angle to the surface from the vicinity of the center of the blade edge side of this vertical blade to the tip side. Close obtuse angle α
Form a roughly triangular pressing blade for pressing the soil that is bent along with and extends along the rotation direction, and the bending line intersects at a right angle with the straight line passing through the center of the tilling axis and the center of the bending line. A plow forming nail characterized by being formed as described above.