JPS6012002B2 - Seed drop passage opening/closing device - Google Patents

Description

Detailed Description of the Invention The present invention provides a seeding machine used in a sheet mulch cultivation method that utilizes a polyvinyl chloride sheet for mulch (hereinafter referred to as mulch sheet) in which a large number of seeding ports are opened at a constant pitch. This invention relates to an opening/closing device for a seed falling passageway that constitutes a part of the invention.

In the sheet mulch cultivation method, if the timing of dropping seeds into the seeding groove is not determined appropriately according to the parallel pitch of the seeding holes of the mulch sheet used, the crop seeds may be sown in a position where the non-seeding holes are covered. There is a risk of being

Therefore, in order to control the timing of seeds falling into the seeding groove, an opening/closing device for the seed falling passage is required. The object of the present invention is to provide a novel opening/closing device for a seed drop passage that is less likely to malfunction, is inexpensive, and does not damage seeds.

In order to achieve this object, the present invention has a mulch sheet that is continuously unwound by opening a large number of seeding ports in matrix at a constant pitch, and a mulch sheet that is pivotally supported at one end and has a seeding hole at the other end. A sowing port detection sled having a seed drop opening for sowing seeds in a irrigation ditch; a guide tube for guiding seeds to fall from a seed hopper; both ends of the seed drop guide tube and the seed drop opening are bonded to each other. When the seed dropping opening is pushed up by the contact between the seeding opening detection sled and the non-seeding opening section of the mulch sheet, the seeds are removed by the opening/closing joint of the seed dropping passage. The passage from the drop guide tube to the seed drop opening is closed, and when the seeding opening detection sled faces the seeding opening of the multi-sheet, the seed drop opening is pushed down by the restoring force of the seed drop passage opening/closing tube, and the seeds are removed from the seed drop guide tube. The main point is that the passage leading to the drop opening was opened. Hereinafter, preferred embodiments of the present invention will be described in detail with reference to FIGS. 1 to 5.

FIG. 1 shows a part of a mulch seeding machine capable of performing a seeding process, a mulch sheet laying process, and a soil covering process. A shaft 2 extending upward from the fixed support plate 1 is rigidly connected to a substantially triangular fixed support plate I that is integrally attached to a frame (not shown) of the multi-seeding machine. A multi-sheet removal roller 3 is rotatably supported on this shaft 2. In front of the fixed support plate 1, a guide shaft 5 for guiding the traveling of the multi-sheet 4 is installed on the fixed support plate 1.
A suppressor support arm 6 is pivotally supported at one end of the fixed support plate 1 at its rear end. At the other end of the suppression theory support arm 6, a suppression theory 7 is supported to bring the mulch sheet 4 into close contact with the field. At the lower end of the fixed support plate 1, a sowing range diffusion preventer 8 is fixed to the fixed support plate 1 so as to protrude further downward from the fixed support plate 1.

A screw hole 10 is provided on the rear surface 9 of the sowing area diffusion preventer 8, and a multi-sheet horizontal traveling guide plate 12 is fixed to the sowing area diffusion preventer 8 by screwing a bolt 11 into this screw hole 10'. ing.

In this multi-sheet horizontal traveling guide plate 12, a rectangular opening □ is provided in the part that is in close contact with the upper surface of the sowing area diffusion preventer 8.
13 is formed, and the shape and size of this gate 13 almost match the shape and size of the upper surface closing opening 14 of the seeding range diffusion preventer 8. In the multi-sheet horizontal traveling guide plate 12, a cover board 16 is swingably suspended via a ring 15 from a part that protrudes horizontally further rearward from a part that is in close contact with the rear surface 9 of the sowing range diffusion preventer 8. ing.

A seed fall guide tube 17 is located above the upper surface closure 14 of the sowing area diffusion preventer 8.

This seed guide tube 17 is supported by a movable support plate 18, and maintains a posture perpendicular to the upper surface of the sowing range diffusion preventer 8. The movable support plate 18 is movable with respect to the fixed support plate 1 by a fixed width in the front-rear direction (in the left-right direction in FIG. 1) through the outermost hole 19 formed in the fixed support plate 1 in the horizontal direction. Can be done.

A seeding port detection sled 20 is further pivotally supported at one end of the movable support plate 18 .

This sowing opening detection sled 20' has a detection tapered portion 20 at one end side thereof (the left side of the sowing opening detection sled 20 in FIG. 1).
a, and has a seed drop opening 21 at the other end (on the right side of the sowing opening detection sled 20 in FIG. 1).
The lower end portion 21a of this seed drop opening portion 21 forms a horizontal surface, and a slightly rounded curvature portion 20b is formed at the portion where this lower end portion 21a and the sensing taper portion 20a are joined. This sled portion 20M is located at a lower position than the upper surface of the seeding range diffusion preventer 8. Since the multi-sheet 4 runs along the upper surface of the multi-sheet horizontal running guide plate 12, the sled portion 20b of the multi-sheet horizontal running guide plate 12 is caused by the non-seeding opening part of the multi-sheet 4 while the multi-sheet 4 is running. Push it up to the height of the top surface.

A seed drop passage opening/closing tube 22 is disposed between the seed drop guide tube 17 and the seed drop opening section 21.

The seed falling passage opening/closing cylinder 22 is made of an elastic material, such as rubber or highly elastic fiber reinforced plastic (FRP), and the seed falling passage opening/closing cylinder 22 itself is exposed to compressive force in the rutting direction. By doing so, the seed falling passage from the seed falling guide cylinder 17 to the seed falling opening portion 21 is closed. As shown in FIG. 1, when the sled portion 20b of the seeding port detection sled 20 is not in contact with the non-seeding port portion of the mulch sheet 4, the seed dropping port 21 is moved to the lower limit position by the elasticity of the seed dropping passage opening/closing cylinder 22. being pushed down.

As a result, the sagging of the seed falling passage opening/closing cylinder 22 itself disappears, and the seed falling passage opens. As shown in FIG. 2, when the sled part 20b of the sowing port detection sled 20 is in contact with the non-seeding port of the multi-sheet 4, the seed drop port 21 reaches the upper limit position at the non-seeding port of the multi-sheet 4. is being pushed up by As a result, part 2 of the seed fall passage opening/closing tube 22
2a blooms and closes the falling path for the seeds. The seed falling passage opening/closing cylinder 22 is configured to sag due to its own flexibility and return to its original state due to its own elasticity, and the material of the seed falling passage opening/closing cylinder 22 is non-rigid. Therefore, even if the seed 29 is sandwiched between the part 22a, this seed 2
It won't hurt 9. In addition, since the structure is not a combination of rigid parts, there are fewer failures. A lower end 23a of a seed passage pipe 23 made of a highly flexible material such as polyvinyl chloride is inserted into the seed fall guide tube 17 with iron. The other end (not shown) of this seed passage pipe 23 is connected to a seed hopper (not shown). A seeding area diffuser 8 is shown in perspective view in FIG.

A curved groove section 24 forming a part of a cylinder is formed at the lower end of the front surface of the sowing range diffusion preventer 8. This groove cutting portion 24 serves to form a seeding groove in the cultivated field. The rear wall portion 25 of the grooved portion 24 has a rectangular shape extending from the upper surface 26 to the lower surface 27 of the seeding range diffusion preventer 8.
A forward feed shooter portion 28 is provided to protrude from the rear surface 9 of the sowing range diffusion preventer 8 toward the rear wall surface 25 of the grooved portion 24 .

The forward feed chute section 28 is for advancing the seeds 29 falling from the seed drop port 21 forward from the position directly below the seed drop port 21 and sowing them into the sowing groove,
A tapered surface 30 is formed. The vicinity of the upper end of this tapered surface 30 serves as a lower limit position stopper for the seed drop opening 21 . The lower end 31 of this tapered surface 30 is set to have a constant height from the lower surface 27 of the sowing range diffusion preventer 8. In this way, the lower end 31 of the tapered surface 30 is connected to the lower surface 2.
7 is maintained at a constant height in order to prevent the function of the advance chute section 28 from being obstructed by soil in the sowing yard. The groove section 24 and the forward feed shooter section 28 are connected by both side walls 32 and 33.

These side walls 32 and 33 extend completely from the top surface 26 to the bottom surface 27 of the seed area diffuser 8. As a result,
The sowing range is further narrowed than the area of the upper surface closure 14,
Both inner wall surfaces of both side walls 32 and 33, rear end wall 2 of grooved portion 24
5 and the lower end 31 of the tapered surface 30. Next, a method of using the sowing area diffusion preventer 8 will be explained based on FIGS. 4 and 5.

As shown in FIG. 4, when the seeding port 4a of the mulch sheet 4 is large, the movable support plate 18 is moved to the rear end of the elongated hole 19 (the right end in FIG. 1) with respect to the fixed support plate 1. Ori,
The seed drop opening 21 is located above the tapered surface 30 near its upper end. As a result, the seeds dropped from the seed drop opening 21 into the sowing area diffusion preventer 8 roll down the tapered surface 30 over a long distance, and their momentum causes the seeds to fall down the rear edge 4b of the sowing opening 4a of the mulch sheet 4. The position where the seeds 29 are sown in the sowing groove is located at the front edge 4c of the sowing opening 4a of the mulch sheet 4 that is laid in close contact with the field by the non-seeding opening. They are so close that they cannot be hidden. On the other hand, as shown in FIG.
(left end in FIG. 1), and the seed drop opening 21 is located above the tapered surface 30 in the vicinity of the lower end thereof. As a result, the sowing range from the seed drop opening 21 to the sowing area (, .
The seeds 29 dropped into the scatter preventer 8 roll down the tapered surface 30 over a short distance, and are sent forward in a very small amount with respect to the rear end green 4e of the seeding opening 4d of the mulch sheet 4.
The position where the seeds 29 are sown in the sowing groove is close to the front edge 4f of the sowing opening 4a of the mulch sheet 4, which is laid in close contact with the field, to the same extent as in the usage example shown in FIG. It turns out. That is, irrespective of the size of the seeding hole of the mulch sheet 4, the sowing position of the seeds 29 is determined at the same distance from the front green of the seeding hole.

As described above, according to the present invention, the seed falling passage opening/closing tube itself is operated by compressive force applied in all axial directions, thereby closing the seed falling passage, and on the other hand, the seed falling passage opening/closing tube itself is operated by the elasticity of the seed falling passage opening/closing tube itself. Since it is designed to open, the structure is simpler than that in the case where the shirt cover is constructed by joining rigid parts together, and as a result, the seeds are not damaged, there are fewer failures, and the reliability of operation is improved.

Furthermore, the device can be manufactured at low cost.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the main parts of the mulch seeding machine that perform furrowing, sowing, and covering, and shows the seed drop passage opening/closing tube in an open state. FIG. 2 is a sectional view of the main part, showing the seed drop passage opening/closing tube in a closed state. FIG. 3 is a perspective view of the sowing area diffusion preventer. FIG. 4 is a cross-sectional view of the sowing area diffusion preventer showing an example of its use when the multi-sheet seeding opening is large. FIG. 5 is a sectional view of the sowing area diffusion preventer showing an example of its use when the sowing port of the mulch sheet is small. 4...Multi sheet, 4a
... Seeding port, 17... Seed falling guide tube, 20... Seeding port detection sled, 21... Seed dropping opening portion, 22... Seed dropping passage opening/closing tube, 29... Seed. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. A mulch sheet that opens a large number of seeding holes in a matrix at a certain pitch and is continuously unrolled, and a seed drop hole that is pivotally supported at one end and used to sow seeds into a seeding groove at the other end. a seed fall guide tube that guides the falling of seeds from the seed hopper; both ends of the seed fall guide tube and the seed fall opening portion are fitted into the seed fall guide tube and have flexibility and elasticity; When the seed drop opening section is pushed up due to contact between the seeding opening detection sled and the non-seeding opening section of the mulch sheet, the seeds fall from the seed dropping guide tube due to the deflection of the seed dropping passage opening/closing tube. When the passage leading to the opening is closed and the seeding opening detection sled faces the seeding opening of the multi-sheet, the seed dropping opening is pushed down by the restoring force of the seed dropping passage opening/closing tube, creating a passageway from the seed dropping guide tube to the seed dropping opening. An opening/closing device for a seed dropping passage that opens.