JPH034167B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for taking out seedlings for a rice transplanter, in which vertically sown seedlings with soil are moved horizontally by a seedling mounting table, and block-shaped seedlings are taken out from the seedlings with planting claws.

Conventionally, when taking out seedlings using the above-mentioned seedling taking method,
As shown in Fig. 5, the seedling removal width _l2 of the planting claw 6 is made approximately equal to the row sowing gap P of soiled seedlings, and the width of the seedling removal
The seedlings were taken out one after another so that the seedlings were located approximately in the center of ₂ , and there was no bed soil left between the blocks of seedling removal left by the planting claws 6. Because the rooting of the seedlings is sparse, the soil in the area where the planting claws 6 hold the block-shaped seedlings is likely to collapse, making it impossible to reliably hold the block-shaped seedlings in the proper posture and causing the planting mud to collapse. There are problems such as block-shaped seedlings falling off from the planting claws 6 before reaching the planting surface, resulting in missing plants, and seedlings falling over when planting on muddy surfaces. This was a significant problem when planting large adult seedlings.

In view of the above-mentioned conventional circumstances, an object of the present invention is to provide a simple and rational improvement method to ensure that block-shaped seedlings can be held in the planting claw, thereby enabling successful seedling planting. At the point.

In the method of the present invention, in the seedling retrieval method for a rice transplanter mentioned above, the seedling retrieval width of the planting claw is made smaller than the row sowing gap of the soiled seedlings, and when retrieving the seedlings,
The row sowing center line should be approximately aligned with the center line of the width of the seedling removal width, and the bed soil should remain between the blocks of seedling removal traces made by the planting claws, with the center line between each shoot being approximately at the center. It is characterized by providing a correlation between the relative movement of the seedling mounting table and the seedling planting claw.

In other words, while leaving the central part between each shoot where the seedlings are sparsely rooted, the bed soil near the seedlings, where the roots are dense and less likely to cause landslides, is held by the planting claws, and the block-shaped seedlings are taken out one by one. As a result, it is possible to more reliably prevent block-shaped seedlings from falling off the planting claws due to collapse of the bed soil, and from lodging when planting on muddy surfaces, resulting in extremely good seedling planting.
Moreover, it is sufficient to make a simple improvement to the conventional rice transplanter by simply setting the width for taking out the seedlings by the planting claw to be smaller.

Next, embodiments of the present invention will be described in detail based on illustrative drawings.

As shown in Figs. 1 and 2, four pine-shaped seedlings W are arranged horizontally in a planting transmission case 2 that receives power transmission from the passenger vehicle body via a telescopic and bendable power transmission shaft 1. Slanted seedling stand to place 3
are arranged so as to be freely movable horizontally and reciprocally with a constant stroke, and each pine-shaped seedling W on the seedling rack 3 is inserted through a notch 5 formed in the sliding frame 4 that receives the lower end of the seedling rack W. Four planting claws 6 are arranged in parallel in the lateral direction of the machine, which take out block-shaped seedlings one by one from the lower end by vertical circulation and plant them on the mud surface. A rotary locking feeder 7 is provided to feed the pine-shaped seedlings W downward, thereby configuring a four-row type seedling planting device that is installed in a riding rice transplanter.

The above-mentioned pine-shaped seedlings W are obtained by sowing paddy seedlings in vertical rows at equal pitches (P = 20 m/m) in the width direction on the soil A, which is rectangular in shape when viewed from above, and germinating and rooting the paddy seedlings. In order to take out one block-shaped seedling with each planting claw 6, as shown in FIG. The opening width l ₁ of the notch 5 is set to 20 m/m, which is equal to the row pitch P of the pine-like seedlings W, and the notch 5 is arranged so as to be line symmetrical with respect to the center line of the opening width in a cross-sectional view. The outer width _l2 of the planting claw 6, which is made up of a pair of bent plate-shaped claw members 6a, is 15 m/m, and the block-shaped seedling stem and leaf penetration portion 6b is formed between the upper end surfaces of the claw members 6a. The width l ₃ is formed to be approximately 8 m/m to 10 m/m, and during one vertical circulation movement of the planting claws 6, the seedling stand 3 is placed in the opening of the notch 5 of the sliding frame 4. Transversely feed the width l ₁ , that is, 20 m/m equal to the row pitch P,
When picking up seedlings with the planting claws 6, the relative movement between the seedling platform 3 and the planting claws 6 is correlated so that the center line of the row sowing of the pine-like seedlings W approximately coincides with the center line of the opening width of the notch 5. Then, the block-shaped seedlings are sequentially taken out by the planting claws 6 while the bed soil A in the center between the vertical shoots of the pine-shaped seedlings W is left behind.

In other words, in the block-shaped seedlings W, the central part between each shoot where the seedlings are sparsely rooted is left behind, and the planting nails 6 hold the bed soil near the seedlings where the roots are dense and are less likely to cause landslides. By taking out the block-shaped seedlings, it is possible to reliably prevent the block-shaped seedlings from falling off the planting claws 6 due to collapse of the bed soil, and to prevent the seedlings from lodging when planting on a muddy surface. , the width l ₃ of the block-shaped seedling stem and leaf penetrating portion 6b of the planting claw 6 is equal to the width l ₄ of a normal seedling.
By forming the soil larger than m/m, the bed soil A
It is configured to allow for displacement of the position of the seedlings in the width direction when rows of seedlings are sown, so that the block-shaped seedlings can be taken out even more smoothly by the planting claws 6.

To explain the seedling planting claw 6 in more detail, the second
As shown in FIGS. 3 and 4, each claw member 6
The height dimension H of the outer surface part of a is the outer width of the planting claw 6.
The bed for block-shaped seedlings is formed to have dimensions larger than l ₂ dimensions and sufficiently larger than the thickness l ₅ of the bed soil A for taking out block-shaped seedlings, and is held between the inner surfaces of both claw members 6a. The structure is configured to more reliably prevent the soil A from collapsing and to more reliably hold the block-shaped seedlings, and the width l ₁ of the notch 5 of the sliding frame 4 is provided on the upper surface of both claw members 6a. A plate-shaped residual bed soil scraping tool 8 whose overall outer width is slightly smaller than that is integrally installed, and the scraping tool 8 is inserted into the notch 5 immediately after the block-shaped seedlings are taken out by the planting claws 6. Scrape off the bed soil A left behind by the planting claws 6,
The structure is such that the downward feeding of the pine-shaped seedlings W when the seedling platform 3 reaches the stroke end is not inhibited by residual bed soil.

In addition, the row sowing pitch P of the pine-shaped seedlings W, and the seedling take-out width of the planting claw 6, which is set to be smaller than that.
l ₂ , and further, specific dimensions such as the width l ₃ of the seedling stem and leaf portion penetration part 6b of the planting claw 6 and the height (H) dimension of the planting claw 6 are as follows.
The configuration can be changed as appropriate.

In addition, in order to remove the bed soil A left behind by the planting claws 6, instead of integrally attaching residual bed soil scraping tools 8 of various shapes to the planting claws 6, the notch portion 5 of the sliding frame 4 is used. Various types of residual bed soil removal equipment may be provided.

The method of the present invention can be applied to seedling extraction using various types of rice transplanters, such as riding-type and walking-type rice transplanters.

[Brief explanation of the drawing]

The drawings illustrate an embodiment and a conventional example of the method for taking out seedlings for a rice transplanter according to the present invention, and FIG. 1 is a partially omitted side cross-sectional view of the seedling planting device, and FIG. 2 shows taking out seedlings using a seedling planting claw. FIG. 3 is a plan view showing the state, FIG. 3 is a partially sectional plan view of the same, FIG. 4 is a side view of the same, and FIG. 5 is a view corresponding to FIG. 3 showing a conventional example. 3... Seedling mounting table, 6... Planting nail, W... Seedling with soil, A... Soil bed, P... Row sowing gap, l ₂ ... Width for taking out seedlings.

Claims (1)

[Claims] 1. A method for taking out seedlings W with soil that has been sown vertically in a rice transplanter, in which the seedlings W with soil are moved horizontally by a seedling mounting table 3, and block-shaped seedlings are taken out from the seedlings W with soil with planting claws 6, the method comprising: The seedling removal width l ₂ of the planting claw 6 is made smaller than the row sowing distance P so that the row sowing center line substantially coincides with the center line of the seedling removal width l ₂ when taking out the seedlings, and The relative movements of the seedling mounting table 3 and the seedling planting claws 6 are correlated so that the bed soil A remains between the blocks of seedlings taken out by the planting claws 6 with the center between each shoot being substantially centered. A method for taking out seedlings for a rice transplanter, which is characterized by: