JPH0154972B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a planting device for a rice transplanter that allows the planting of seedlings to be planted onto rice fields in a good manner.

Conventionally, as a planting device of a rice transplanter, in a so-called backward-tilting rice transplanter that generally moves in the direction of the arrow in Fig. 2, a seedling scraping device is attached to the tip of a planting rod 1 that moves up and down in a fixed motion trajectory. A structure in which a beak 2 is fixed, a rod 3 is attached to the back of the beak 2 so as to be slidable up and down, and a fork 4 for pushing out seedlings is integrally fixed to the tip of the rod 3 substantially parallel to the beak 2. are often used. In such a planting device, seedlings are planted perpendicularly to the field surface, so the beak 2 is placed at the seedling planting position on the field surface.
is set to be inclined at a certain angle with respect to the rice field. However, with such a structure, when pushing out seedlings, the fork 4 also moves up and down in an inclined state with respect to the field surface in accordance with the inclination angle of the beak 2, so each time it operates, it moves forward in conjunction with the beak mark I on the field surface. A large hole is formed by the fork 4 (see Figure 3~), and as a result, the bed soil of the planted seedlings a becomes difficult to adhere to the muddy soil, making the planting posture unstable, resulting in loose seedlings and lodging. This often resulted in seedlings, significantly impairing planting accuracy.

Therefore, in the present invention, a beak for scraping seedlings and a fork for pushing the seedlings downward into the soil are provided on the back side of the beak at the tip of a planting rod that moves up and down in a fixed motion trajectory. In the inclined rice transplanter, at least from the lowest point of the movement locus of the fork until the fork leaves the rice field, the fork is configured such that the middle part of the fork in the seedling extrusion direction is located on the retreating side with respect to the advancing direction, and the fork By configuring the back of the rice pad to become narrower in the direction away from the beak, it is possible to eliminate the occurrence of loose seedlings or lodging seedlings, and to greatly improve the accuracy of planting seedlings on the rice field. The aim is to provide a machine-based planting device.

The structure of the present invention will be described with reference to an embodiment shown in the drawings. As shown in FIG. Similar to the conventional method, a rod 3 is installed in parallel with the beak 2 so as to be slidable up and down, and a fork 4 having a bifurcated seedbed soil shoulder holding part 4a is fixed to the tip of the rod 3. However, in the present invention, the fork 4 is configured as follows.

That is, the midway portion 4d of the fork 4 from the base end 4b of the seedbed soil shoulder holding portion 4a to the fixing portion 4c for the rod 3 is configured to approach the beak 2 sequentially from the bottom to the top. With this configuration, at least from the lowest point of the movement trajectory A of the lower end of the fork 4 until it pulls out of the rice field, the midway portion 4d of the fork 4 is located on the retreating side with respect to the traveling direction of the aircraft. It's getting old.

Further, the width of the back portion 4'd of the fork midway portion 4d is tapered on both the left and right sides, as shown in FIG. 6, so that the width becomes narrower as it goes away from the beak 2 (downward in FIG. 5,5 are formed. Although the back portion 4'd has a trapezoidal cross section in the illustrated example, it may have a triangular shape.

In the figure, B is the movement trajectory of the beak tip, and c is the planted seedling a.
b is the bed soil, and b is the stem part.

Next, the operation of the present invention will be explained. Now, the planted seedlings a, which are scraped off one by one by the beak 2 from the pine seedlings on the seedling stand (not shown), are held with the seedbed soil c between the beaks 2, and the upper surface of the bed soil is held by the shoulder holding part of the fork 4. It is supported in contact with 4a and carried to the planting position on the rice field. When the beak enters the field near the lower end of the locus B, the rod 3 and fork 4 move downward to push the clamped seedling into the soil and plant it. When the planting is finished as described above, the planting rod 1 enters the upward stroke, but at that point the rod 3 sinks into the planting rod 1, so the fork 4 itself also returns to its upward movement. This process is repeated while the machine moves forward to continuously plant rice on the rice field.

Now, in the above-mentioned series of steps, at the seedling planting position on the rice field, plunge holes A and B are formed by the beak 2 and the fork 4 in a state where they communicate in the front and back direction, respectively, as shown in Figures 5 to 5. The portion 4d is configured to approach the beak 2 sequentially from the bottom to the top, and from the bottom of the fork trajectory A until it exits the field, the fork midway portion 4
Since d is located closer to the beak 2 side than the locus A, the hole RO formed by the fork 4 will not be larger than the hole formed by the lower end of the fork 4. Therefore, the hole formed by the fork 4 is short in the front-rear direction as shown in the figure, and has the shape of a rising wall whose front surface is substantially vertical along the fork locus A. Therefore, the stem part b of the seedling a pushed out into the mud below by the fork 4 is attached and held on the front wall of the hole, as shown in Figure 5~, and the seedling a is held against the field surface. The plant is maintained in an extremely stable and proper planting posture.

In addition, the back part 4'd of the fork 4 is formed to become narrower as it goes in the direction away from the beak 2, so when it plunges into the rice field, it is easier to push through the mud and there is less thrust resistance, and the fork 4 In addition, when Fork 4 enters the rice field, it rapidly spreads the mud to the left and right, and then immediately moves up and retreats from the hole, so the restoring force of the soil helps prevent Fork 4 from scattering through the hole. The area will be backfilled from the left and right. Therefore, the stem part b of the seedling a is attached to and supported by the rice field from both the left and right sides, which, together with the above-mentioned frontal retention effect, improves the stability during seedling planting, and greatly reduces the occurrence of loose seedlings and lodging seedlings. This can further improve planting accuracy.

As described above, the present invention has a beak for scraping seedlings at the tip of a planting rod that moves up and down in a fixed motion trajectory, and a fork for pushing the seedlings downward into the soil on the back of the beak. The backward-tilting rice transplanter is configured such that, at least from the lowest point of the locus of movement of the fork until it is pulled out of the rice field, the middle part of the fork in the seedling extrusion direction is located on the backward side with respect to the advancing direction. In addition, since the back of the fork is configured to become narrower as it goes away from the beak, the hole (groove) formed in the field by the fork can be made as small as possible, and the fork can be It is possible to prevent the scattering of mud when entering the trench as much as possible, and to increase the resilience of the mud after trenching, allowing the planted seedlings to be firmly attached to the rice field not only from the front but also from both the left and right sides. , it is possible to reliably plant seedlings while always keeping them in a stable and appropriate planting posture with respect to the rice field, to prevent the occurrence of loose seedlings and lodging seedlings as much as possible, and to greatly improve the accuracy of planting. There is an effect that can be done.

[Brief explanation of drawings]

Figure 1 is a side view of the main parts, Figure 2 is a side view of the conventional example, Figure 3 is the conventional example, Figure I is a longitudinal sectional side view showing the state of trenches being made in the rice field by beaks and forks, and Figure I is a side view of the conventional example. is a vertical side view showing the state at the time of seedling planting;
The same figure is a plan view, FIG. 4 is a side view showing the movement locus of the beak and fork and the relationship between the forks in the present invention, and FIG. The same figure is a longitudinal side view showing the state at the time of seedling planting, the same figure is a plan view of the same, Figure 6 is a cross-sectional view of the fork, and Figure 7 is when the fork rushes into the rice field. Fig. 8 is a side view showing the state of the soil, and Fig. 8 is a plan view showing the state underground. 1... Planting rod, 2... Beak, 4... Fork, 4d... Midway part of fork, 4'd... Back of fork, A... Motion trajectory of fork.

Claims (1)

[Claims] 1. Backward-tilting rice planting, in which a beak for scraping seedlings is attached to the tip of a planting rod that moves up and down in a constant motion trajectory, and a fork for pushing the seedlings downward into the soil is provided on the back of the beak. In the machine, the fork is configured such that at least from the lowest point of its locus of motion until it pulls out of the field, the midway part of the fork in the direction of pushing out the seedlings is located on the retreating side with respect to the advancing direction, and the back of the fork is 1. A planting device for a rice transplanter, characterized in that the width becomes gradually narrower in a direction away from a beak.