JPH0119618Y2 - - Google Patents

Description

[Detailed description of the invention] (a) Industrial application field The present invention relates to a seed dispensing device in a vacuum seeding machine.

(b) Conventional technology In direct seeding cultivation, the uniformity or irregularity of the number of seeds sown in each plant or in each location greatly affects the subsequent germination, growth, and yield, and thinning and supplementary planting work is also important. This will cause a significant difference in the amount of work involved.
Also, if the price per seed is high,
Economic losses due to overseeding cannot be ignored either.

Therefore, it is important to uniformly sow an appropriate amount of seeds, so there is a strong demand for a seed dispensing device that can accurately sow a uniform number of seeds.

Therefore, in order to meet these demands, consideration was given to making the small holes formed on the surface of the feeding roll into a vacuum (depressurized) state so that a certain amount (one grain) of seeds can be absorbed into the small holes and fed out. A so-called vacuum seeding machine has been proposed (for example, in Japanese Patent Application Laid-open No.
Publication No. 117707, ).

By the way, even with a vacuum seeding machine that sucks seeds into small holes in a vacuum and feeds them out, it is not possible to achieve a complete quantitative feeding state by itself. A scraping piece is provided at the bottom of the seedling, and this scraping piece scrapes off excess seeds adsorbed to the small hole, thereby improving accuracy. Other general hole-pumping type seeding machines and magnetic attraction type seeding machines are also configured to remove excess seeds with a brush (for example, see Utility Model Publication No. 40-28538 and (Refer to Japanese Patent Application Laid-Open No. 123429/1983).

(c) Problems to be solved by the invention In all of the conventional techniques, excess seeds are adsorbed and retained in the holes, etc., and then a scraping piece or a rotating brush is applied to the retained part. Since the structure was to scrape off excess seeds, it was not possible to compensate for variations in the amount caused by irregularities in the posture and direction of the seeds themselves, and the rotating brush etc. was directly involved in the seed retention area. As a result, things that should not have been scraped off are often forcibly removed.
There was a problem that this could conversely result in missing grains during feeding.

Therefore, the present invention was implemented with the aim of solving the above-mentioned problems in the conventional technology.

(d) Means for Solving the Problems In order to achieve the above object, the present invention provides a horizontal hole 9 in the axial direction that is switched and connected to the pressure reduction port 12 and the positive pressure port 13 of the valve 6 in a predetermined cycle. ... are bored in the roll 7, and a plurality of rows of small holes 10... are opened in the axial direction from each horizontal hole 9 to the roll outer periphery.
In the vacuum seeding machine, the vacuum seeding machine is installed in relation to the valve 6 so that when the small hole 10 is located in the seed removal section 20, the seeding is in a reduced pressure state, and when the small hole 10 is located in the seed removal part 20, the vacuum seeding machine is in a positive pressure state. A sieve line 22 located along both sides of each of
The seed dispensing device is characterized in that it is brought into close or elastic contact with the outer periphery of the seed dispensing device.

(E) Effect In the vacuum seeding machine to which the device of the present invention having the above configuration is applied, the small holes 10 of the outer cylinder of the roll 7 are located in the seed storage section 19, and when the seeds are adsorbed to each, the sieve line 22 The seed particles are not directly involved in the pores 10, but are located on both sides of the pore row, and the seed grains are aligned between them and adsorbed to the pores 10, resulting in significantly improved quantitative performance. Improved.
Also, there is no need to forcibly scrape off seed grains that should originally be absorbed into the small holes.

(f) Embodiments Next, embodiments of the present invention will be described with reference to the drawings.

Figure 1 is a side view showing the layout of various devices of the vacuum seeding machine. It is comprised of a rotary A, a seed feeding device b, a soil covering device C, a pressing roller D, etc.

The seed dispensing device B is composed of a seed dispensing device B, a roll section 1, a hopper section 2, a seeding tube section 3, etc., and a blower 4 that generates suction air is installed in communication with the seed dispensing device B.

Fig. 2 is a vertical cross-sectional view of the seed feeding device B;
Figure 4 is a sectional view taken along line X-X' in Figure 2, respectively.
It is a sectional view taken along YY', and the roll portion 1 of the seed feeding device B is composed of a main shaft 5, a valve 6, a roll 7, and the like.

The main shaft 5 is rotatably supported relative to the valve 6, and a roll 7 is fitted onto the main shaft 5 so as to be able to rotate together with the main shaft 5. A spring presses the sliding contact between the side surface of the roll and the side surface of the valve. 8 is interposed between the roll end face and the main shaft on the opposite side of the sliding contact portion.

The roll 7 has a horizontal hole 9 that opens on the sliding contact side.
... are drilled at equally distributed positions on the same circumference, and furthermore, small holes 10 ... are opened from each side hole 9 ... toward the roll outer periphery 7b, and each small hole 10 ... is opened at the outer periphery of the roll. Ru. Note that the small holes 10 are formed in a plurality of rows in the axial direction of the roll 7, and each small hole may be opened in the groove 11 carved on the outer periphery of the roll 7. .

The valve 6 has two through holes corresponding to the pitch circles of the horizontal holes 9, one of which is used as a pressure reduction port 12, and the other is used as a positive pressure port 13.
Furthermore, an arcuate pressure reducing groove 14 including the opening of the pressure reducing port 12 is provided on the side surface that comes into sliding contact with the roll 7.
has been established.

The pressure reduction port 12 is communicated with the intake side of the blower 4 through a flexible tube 15, and the positive pressure port 13 is communicated with the atmosphere or the discharge side of the blower 4 to maintain atmospheric pressure or higher (hereinafter referred to as positive pressure). pressure)
It is made to become.

As a result, when the main shaft 5 is rotated, the roll 7
rotates while slidingly contacting the valve 6,
When each of the horizontal holes 9 and small holes 10 communicate with the pressure reducing groove 14, suction air is generated, and when they communicate with the positive pressure port 13, a positive pressure is generated. That is, in FIG. 4, if the roll 7 is at α, it will be in a reduced pressure state, and if it is at β, it will be in a positive pressure state.

The hopper section 2 includes a hopper 16 and a seed storage section 1.
9, and the seed storage section 19 is provided with a shutter 17 for adjusting the amount of seeds flowing into the section. In addition, the above-mentioned roll 7 is provided in the seed storage section 19.
A part of the roll 7 is inserted into the small hole 10 of the roll 7.
It is set so that when the seed storage part enters and is located, it becomes in a reduced pressure state and adsorbs the seeds in the seed storage part, and the small hole 10 comes out of the seed storage part and enters the seed removal part 20. It is set so that a positive pressure is applied when it is positioned, and it is configured to release the seeds at the release section.

The seeding tube part 3 consists of a seeding tube 21 that is provided with an opening just below the roll 7.
The earth covering device C is installed at the lower end of the container, and a pressure roller D is also installed behind it.

By the way, the present invention is based on FIGS. 3, 5, and 6.
As shown in the figure, in the seed storage section 19, sieve lines 22 are provided on the outer periphery of the roll 7, located on both sides of each row of small holes opening in multiple rows in the axial direction.

The sieve lines 22 are swingably supported on the frame of the storage section 19 by pins 23, and each extending portion from the supporting section extends along each row of small holes as shown in FIG. The rollers 7 are positioned so that each extending portion is positioned close to or in contact with the outer circumferential surface of the roll 7.

In the example shown in FIG. 3, the sieve wire 10 is forcibly swung by the cam 24 that operates in synchronization with the roller 7, and an intervening device is installed to press the sieve wire 10 against the cam 24. spring 2
The sieve wire 10 is brought close to the roller 7 by a spring force of 5. Also, in the example in Figure 5,
A spring 27 is interposed between the portion of the sieve wire extending to the opposite side from the support portion and the fixed frame, and the spring force causes the sieve wire to come into elastic contact with the roll outer periphery 7b, and the sieve wire 10 of the roll 7 Protrusions 26 are appropriately provided at locations where the sieve wire 10 comes into contact with the sieve wire 10, thereby causing the sieve wire 10 to swing.

(g) Effects of the invention Since the present invention is constructed as explained above, it has the following effects.

When seeds are adsorbed to the small holes 10 on the outer periphery of the roll 7, the sieve lines 22 do not directly touch the small holes 10, but are positioned on both sides of the 10 rows of small holes and absorb the seeds between them. Since the seeds are attracted to each small hole 10 while being aligned, the orientation of the seeds can be adjusted, which was impossible with the conventional method of scraping off excess particles from the seeds once they have been absorbed using a scraping piece or a rotating brush. This makes it possible to quantify seeds more accurately, and since the scraping action of a rotating brush does not directly affect the seed adsorption area, seeds that should be retained are not forcibly removed by the scraping action. There is no possibility of seeds being removed and missing grains, and as a whole, seeds are fed out with very good quantitative accuracy.

[Brief explanation of the drawing]

Figure 1 is an overall side view of the vacuum seeding machine, Figure 2 is a vertical sectional view of the feeding device, and Figures 3 and 4 are the X in Figure 2.
-X' cross-sectional view and Y-Y' cross-sectional view, Figure 5 is a cross-sectional view showing another embodiment, Figure 6 is a front view, and Figure 7 is an explanation showing the suction state when no sieve wire is used. It is a diagram. 6...Valve, 7...Roll, 9...Horizontal hole, 1
0...Small hole, 12...Reduction port, 13...Positive pressure port,
19... Seed storage section, 20... Seed detachment section, 22
...sieve line.

Claims (1)

[Scope of utility model registration request] A horizontal hole 9 in the axial direction that is switched and connected to the pressure reduction port 12 and positive pressure port 13 of the valve 6 in a predetermined cycle.
... are bored in the roll 7, and a plurality of rows of small holes 10... are opened in the axial direction from each horizontal hole 9 to the outer periphery of the roll. When located in the reduced pressure state, the same small hole 10
In the vacuum seeding machine, the sieve lines 22 located along both sides of each of the rows of small holes are used to remove seeds. Storage section 19
A seed dispensing device for a vacuum seeding machine, characterized in that the sieve wire 22 is disposed in the interior of the roller 7 and is brought into close or elastic contact with the outer periphery of the roll 7.