JPH04148603A - Furrow opener for direct sowing - Google Patents

Abstract

PURPOSE:To efficiently form trapezoidal rows each having a shallow furrow in a state having smooth furrow walls by specifying the outer shapes and rotation numbers of the furrow-opening sections of shallow furrow-forming blades and deep furrow-forming blades. CONSTITUTION:The shapes of the furrow-opening sections of a shallow furrow- forming blade 3 and a deep furrow-opening blade 5 are formed in tapered V-or U-shaped states, and the furrow opener is operated so as to be satisfied with a relation of NXl>L, when the traveling distance of a tractor, the rotation number of the furrow-forming blade 5, and the circumference of a rotation shaft 2 are densignated as L, N, and l, respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a direct sowing grooving device used to form direct sowing furrows.

More specifically, the present invention is capable of forming a stable direct-seeding trench in which deep drainage trenches are arranged on both sides of a shallow full-depth shallow trench for type T1, and for direct-seeding seeds. This invention relates to a grooving device for direct sowing that greatly contributes to improving the productivity of direct sowing by uniformly germinating and growing seeds.

(Prior art) The conventional method for sowing seeds and covering soil in the direct seeding method is to install groove-cutting protrusions in a fixed state on a towing vehicle, and to cut the soil with the groove-cutting protrusions as the towing vehicle advances, thereby cultivating rice fields, etc. A seeding groove is formed directly on the sowing surface L, seeds are discharged into the formed seeding groove from a sowing tube installed correspondingly to the seeding groove, and then covered with soil by the soil filling action of the soil covering plate installed in the seeding tube. Was.

[Problem to be solved by the invention]

However, when sowing and covering soil in this way, there were the following problems.

Since the seeding furrow was formed by simply tearing the soil by moving the furrow cutter, the seeding furrow that was formed was uneven and unclear. Therefore, the height of each seed discharged from the seeding tube into the seeding furrow is difficult to maintain at a constant height, and it is therefore inevitable that the soil covering thickness will be uneven. In addition, since the seeding grooves were formed directly on the uneven direct sowing surface and the seeds were sown and covered with soil, if water was supplied to the directly sown surface by rain or irrigation,
It was difficult to drain the water smoothly, resulting in stagnant water in some places.

Conventional direct sowing has had serious problems such as delayed germination and plant loss due to lack of light, oxygen, and excess water due to uneven soil covering and poor drainage, resulting in poor productivity.

The present invention was completed through research into the ground leveling conditions most suitable for direct sowing, and its purpose is to provide a furrowing device for direct sowing that greatly contributes to improving productivity when using the direct sowing method. .

[Means to solve the problem]

In order to solve the above problems, the present invention employs the following means.

That is, the grooving device for direct sowing (hereinafter referred to as the device) according to the present invention is a grooving device for direct sowing that is used to form deep drainage grooves 11 with a deep groove depth on both sides of a shallow groove 9 for sowing with a shallow groove depth. In this groove cutting device, a shallow groove forming blade 3 that forms the shallow groove 9 having a diameter larger than that of a rotary shaft 2, which is a round shaft that rotates around the axis while contacting the ground, rotates around the axis. Shallow groove forming blades 3 are provided on both sides of the shallow groove forming blade 3.
The deep groove forming blade 5 that forms the deep groove 11 having a larger diameter than the diameter of the deep groove 11 is provided on the rotary shaft 2 with its axes aligned, and the groove cutting blade 6 is pulled so as to be rotatable at a required speed around the Φ axis. The grooving blade 6 is provided on the vehicle, and the grooving blade 6 is configured to rotate in the traveling direction of the towing vehicle. The outer shape of the facing portion 13.13, which becomes the grooved section, is formed in a symmetrical shape that is tapered into a V-shape or a U-shape, and the traveling length of the towing vehicle per unit time is L, the circumference of the rotating shaft 2 is l, and the number of rotations of the groove cutting blade 6 per unit time is N, the relationship of N)l>L is satisfied. It is.

[Function] However, when the grooving blade 6 is rotated at a required speed as the towing vehicle 7 advances, the direction of rotation of the grooving blade 6 is the direction in which the towing vehicle 7 moves, and the shallow grooving blade 3 is rotated. and deep groove forming blade 5
Since the outer shape of the groove cutting part is formed to have a tapered V-shape or U-shape, the shallow groove forming blade 3 and the deep groove forming blade 5 can push the ground apart without straining and cut the V-shape. A shallow groove 9 and a deep groove 11 are formed in the shape of a U-shape or a U-shape.
17 is formed. Plus NXj! Since the relationship of ) L, excessive slippage occurs between these and the shallow groove wall surface 20, the deep groove wall surface 21, and the ridge #a19.As a result, the shallow groove, the deep groove wall surface 20, 21, and the ridge top 19. The surface will be finished as a stable surface with few irregularities.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

In FIGS. 1 to 5, a device 1 according to the present invention has a grooving blade 6 provided with a shallow grooving blade 3 on a rotary shaft 2 and deep grooving blades 5.5 on both sides of the grooving blade 6, which can be rotated by a tractor 7. By the required rotation of the groove cutting blade 6 as the towing vehicle 7 advances, a shallow groove 9 for seeding with a shallow groove depth is formed by the shallow groove forming blade 3 and is positioned on both sides of the hand. A deep drainage groove 11 having a deep groove depth is formed by deep groove forming blades 5.5 on both sides. A more specific explanation of this is as follows.

The grooving blade 6 has large-diameter deep grooving blades 5 fixed to a relatively long rotating shaft 2 pivotally supported at both ends of a support frame 12 connected to a towing vehicle 7 in a juxtaposed state at a required interval L. , and a small-diameter shallow groove-forming blade 3 is fixed at the center of the adjacent deep-groove forming blades 5, 5.

As shown in FIG. 4, the shallow groove forming blade 3 and the deep groove forming blade 5 have a tapered outer shape at opposing portions 13 and 13 that serve as groove cutting portions in a cross section cut along a plane including the axis thereof. It is formed in a symmetrical shape.

The groove cutting blade 6 having such a configuration is configured to be rotated and driven by, for example, the power source of the towing vehicle 7, and the direction of rotation thereof is the direction of movement of the towing vehicle 7 (direction of arrow f shown in FIG. 5). There is. Also, the traveling length of the towing vehicle per unit time is L
, the circumference of the rotating shaft 2 is l, and the number of rotations of the groove cutting blade 6 per unit time is N, the relationship N)l>L is set to be satisfied between them. The product of N and l is set according to the soil condition and moisture content of the ground so that the walls of shallow grooves, the walls of deep grooves, and the tops of ridges are finished as stable surfaces with few irregularities. For ground with high moisture content, use the shallow groove forming blade 3, deep groove forming blade 5, or rotating shaft 2.
Since there is no problem even if the degree of slip caused by excessive rotation is small, this product is set to be relatively small, for example, about 1.3. On the other hand, in dry fields, fields, and other ground with low moisture content, it is necessary to increase the degree of slip due to excessive rotation, so this product is set relatively large, for example, about 1.5 to 2.

In FIG. 3 and FIGS. 5 and 6, the reference numeral 14 indicates the shallow groove forming blade 3.
This is a seeding tube provided corresponding to the shallow groove 9 formed by the seeding tube 14, and the seeds supplied from the seed feeding device 15 shown in FIGS. 1 and 2 are discharged from the seeding tube 14 to the bottom of the shallow groove 9. Further, in Figs. 5 and 6, reference numeral 16 is a soil covering plate that covers the seeds discharged to the bottom of the shallow trench with an appropriate thickness of soil, and the seeding pipe 1
4 via a spring member 17.

However, when the groove cutting blade 6 is rotated at a required speed as the towing vehicle 7 advances, the plurality of deep grooves 11 for draining the deep grooves are cut into the deep groove forming blade due to the above-mentioned "action section". A shallow groove forming blade 3 is provided at the longitudinal center portion of the top end 19 of the trapezoidal ridge 18 formed as a result.
As a result, a shallow groove 9 is formed. The groove wall surface 20 of the shallow groove 9 and the groove wall surface 21 of the deep groove 11 formed in this way
is formed as a stable surface with few irregularities due to the excessive slip phenomenon caused by excessive rotation of the shallow groove forming blade 3 and the deep groove forming blade 5, so as for the shallow groove 9, its cross section exhibits a clear bow shape. . Therefore, each seed discharged from the seeding pipe 15 into the shallow groove 9 will exist at the same height position (the bottom of the shallow groove). In addition, since the dedication end 19 is formed flat, when the soil at the top of the ridge is gathered and covered with the soil covering plate 16 as shown in FIGS. 5 and 6, the covering is done uniformly. For this reason, the thickness of the covering soil is naturally uniform.

Furthermore, since the deep groove 11 is formed as a clearly stable V-shaped groove, excess water during rainfall or irrigation can be smoothly drained away using the deep groove 11 as a drainage channel.

The deep groove 11 formed by the groove cutting blade 6 is mainly used for drainage purposes, but the deep groove 11 may also be used as a fertilization groove. In that case,
A fertilization pipe having the same structure as the T1 type pipe is attached to correspond to the formed deep groove 11.

7-8 and 10-11 show other embodiments of the grooving blade 6 according to the present invention. In the shallow groove forming blade 3 and the deep groove forming blade 5 of the groove cutting blade 6 shown in FIG. 7, the outer shape of the facing portion 13, 13 which becomes the groove cutting portion in a cross section cut along a plane including the axis thereof is as follows. It is formed in a symmetrical shape with a tapering zero shape. Further, the shallow groove forming blade 3 of the grooving blade 6 shown in FIG. 8 has a flange portion 22 provided around its tip portion that extends in a direction perpendicular to the axis. FIG. 9 shows a shallow groove 9 formed by the shallow groove forming blade 3, which is formed as a 7-shaped groove. When sowing seeds in the bottom part 23 of the 7-shaped groove formed in this way, the seeds 24 are placed in the narrow groove at the bottom.
becomes stuck, and the position of the seed is fixed. Therefore, even if no special soil covering measures are taken, it is expected that water flowing through the shallow trenches 9 due to rain or the like will cause the bottom of the shallow trenches to collapse and provide the desired soil covering.

10 and 11 show other embodiments of the grooving blade 6 according to the present invention, in which the circumferential surface of the grooving blade 6 is formed as a surface bent with the bending line 25 as a boundary. When configured in this way, even if the soil is sticky, the soil can be easily removed during trench cutting, which is preferable.

〔Effect of the invention〕

Since the device according to the present invention is configured as described above,
To form shallow grooves and deep grooves with uniform groove depth and stable groove walls with few irregularities due to excessive slip phenomenon caused by excessive rotation of shallow groove forming blades, deep groove forming blades, and rotating shafts. I can do it.

Therefore, unlike conventional direct sowing, in which a seeding furrow is formed by tearing the soil with a furrow cutter, the seeds are sown in this furrow, and the soil is covered with soil. In addition, deep grooves can function as drainage channels to facilitate drainage.

In this way, according to the present invention, it is possible to prepare the land most suitable for direct sowing, regardless of whether it is a wet field, a dry field, or a field, and therefore, it is possible to uniformly germinate and develop directly sown seeds. This will greatly improve the productivity of direct sowing.

[Brief explanation of the drawing]

Figures 1 and 2 are perspective views showing the device according to the present invention attached to a tractor; the third lever is a perspective view showing the groove cutting blade that constitutes the device according to the present invention together with the seeding tube; and Figure 4 is a perspective view showing the device according to the present invention attached to a tractor. A cross-sectional view showing the shallow and deep grooves formed by the groove cutting blade, Part 5 is a cross-sectional view illustrating the state of sowing with a seeding pipe and the state of covering soil with a soil covering plate attached to this sowing pipe, and Fig. 6 is a perspective view thereof. Figures 7 and 8 are front views showing other aspects of the grooving blade;
FIG. 9 is a sectional view showing the shallow grooves and deep grooves formed by the groove cutting blade shown in FIG. 8 together with the state of seeding in the shallow grooves;
Figures 0 to 11 are front views showing other aspects of the grooving blade. l...device, 2... rotating shaft, 3... shallow groove forming blade,
5... Deep groove forming blade, 6... Grooving blade, 9... Shallow groove, 11... Deep groove, 13... Opposing part of the groove cutting part, L
...Travel length of the tractor per unit time, l...Circumference of the rotating shaft, N...number of revolutions of the groove cutting blade per unit time.

Claims (1)

[Claims] A direct seeding groove cutting device used to form deep drainage grooves 11 on both sides of shallow seeding grooves 9, which are in contact with the ground. A shallow groove forming blade 3 for forming the shallow groove 9 having a diameter larger than that of the rotary shaft 2, which is a round shaft that rotates around the axis, is provided with the axes aligned with each other, and the shallow groove forming blade On both sides of the shallow groove forming blade 3, a deep groove forming blade 5 for forming the deep groove 11, which has a diameter larger than that of the shallow groove forming blade 3, is provided on the rotary shaft 2 with their axes aligned with each other. The grooving blade 6 is rotatable in the direction in which the traction vehicle moves, and the shallow grooving blade 3 and the deep grooving blade 5 are The outer shape of the facing portions 13, 13, which are the grooved portions, in a cross section cut along a plane including the respective axes is formed in a symmetrical form exhibiting a tapering V-shape or U-shape, and the unit When the traveling length of the towing vehicle per hour is L, the circumference of the rotating shaft 2 is l, and the number of revolutions of the groove cutting blade 6 per unit time is N, the relationship N×l>L is satisfied. A grooving device for direct sowing, which is characterized by the following: