JPH06181605A - Vacuum type sowing device - Google Patents

Abstract

PURPOSE:To improve the precision of the seed suction of a suction nozzle in a sowing device for sucking seeds in a seed hopper with the suction nozzle and subsequently sowing the sucked sows. CONSTITUTION:Sowing device for sucking seeds in a seed hopper (15) with a suction nozzle (17) and subsequently sowing the sucked seeds into trays (3) for seedlings is equipped with an air-blowing means (27) for floating the seeds (B) in the seed hopper (15) with the flow of air and sucking the floated seeds (B) with the suction nozzle (17).

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a tray feeder, a soil filling machine, a seeder, and a soil cover, and the tray for feeding seedlings supplied from the tray feeder is being transferred to the tray while being conveyed by a conveyor. The present invention relates to a vacuum-type seeding device for a seeding plant, which is adapted to perform operations such as filling soil, sowing, covering soil, and watering.

[0002]

2. Description of the Related Art For example, as a sowing machine used in this type of plant, there is a vacuum sowing machine in which seeds in a seed hopper are adsorbed by a suction nozzle by a vacuum force and taken out and sowed.

[0003]

In such a vacuum sowing machine, when the remaining amount of seeds in the seed hopper becomes small,
There is a defect that the seed adsorption accuracy is lowered and a missing strain occurs. Further, there is a problem that it takes a long time to be adsorbed and the cycle timer is extended by that much, and the work efficiency is reduced.

[0004]

SUMMARY OF THE INVENTION Therefore, the present invention provides a seeding device in which seeds in a seed hopper are adsorbed by a suction nozzle and seeded in a seedling-growing tray, and the seeds in the seed hopper are air-flowed. By providing air jetting means to float by floating and sucking floating seeds to the suction nozzle, even if the remaining amount of seeds in the seed hopper becomes small, reliable suction is always performed to maintain stable suction accuracy. As a result, it is possible to improve the adsorption accuracy of heteromorphic seeds, shorten the time until the adsorption, and shorten the cycle timer to improve the work efficiency.

[0005]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a cross-sectional explanatory view of a seed hopper, and FIG. 2 is a side view of the whole. In FIG. 1, (1) is a tray automatic supply for accommodating trays (3) for raising seedlings (3) in multiple stages using the seedling raising boxes (2) as trays. A device, (4) is a filling conveyor that conveys the trays (3) supplied from the supply device (1) backward, facing the feeding start side below the supply device (1), and backward. Is a soil filling machine which is provided in the feeding intermediate part of the filling conveyor (4) and supplies the soil in the soil hopper (6) to the tray (3) on the filling conveyor (4), and (7) is the filling A seeding conveyor in which the feed start end is continuously provided to the feed end of the conveyer (4), and (8) is provided in the feed intermediate part of the seeder conveyer (7) and the tray (3) after the soil filling on the conveyer (7) is performed. A vacuum seeding machine for sowing, (9) connecting the feed start end to the feed end of the seeding conveyor (7). Cover soil conveyor for,
(10) is a soil-covering machine which is provided at the feeding intermediate portion of the soil-covering conveyor (9) and covers the tray (3) on the conveyor (9) after seeding, with the tray (from the supplying device (1) ( 3) is being conveyed by the conveyors (4), (7) and (9), the tray (3) is configured to perform soil filling, seeding, and soil covering. Note that (11) and (12) are irrigation devices that perform spray irrigation on the tray (3) after filling with soil and covering with soil.

As shown in FIGS. 3 to 4, the vacuum seeder (8) has a seeding hole (A) which is a recess for seeding on the soil surface filled in each pot (3a) of the tray (3). (13) for forming seeds, a lifting and lowering mechanism (14) for lifting and lowering the pressure suppressor (13), a seed hopper (15) for storing seeds (B) for sowing, and the hopper (15) And a nozzle insertion port (16a) for supporting the hopper (15) rotatably provided in the supply port of the shaft (16).
A suction nozzle (17) that pokes the tip nozzle port (17a) into the nozzle and sucks and takes out one seed (B) with a vacuum suction force, and a nozzle port (17a) that pokes into the nozzle insertion port (16a). A nozzle moving mechanism (18) for moving the nozzle (17) vertically and forward and backward, and an inclination of the hopper (15) around the shaft body (16) when the nozzle opening (17a) is inserted into the nozzle insertion opening (16a). A hopper rotating mechanism (19) for rotating the rear end upward to collect the seeds (B) below the nozzle opening (17a);
7) The seed guide port (20) for discharging and dropping the seed (B) taken out from the hopper (15) is connected to the guide port (20) through the seed hose (21) so that the guide port (20) is connected. ) Seeds (B) from each pot (3a)
A seeding port (22) for discharging to the seeding hole (A) of the inner soil is provided, and one grain of the seed (B) is adsorbed and taken out by the vacuum suction force of the nozzle (17) from the inside of the hopper (15) to form one grain. Alternatively, it is configured to sow two seeds.

The nozzle (17) and the hose (21)
In the case of the present embodiment, a total of 20 nozzle suction main cylinders (2
3) and the falling seed recovery frame (24), respectively.

Further, when the hopper (15) is rotated upward, an air jet air passage (25) for suspending the seed (B) below the nozzle opening (17a) with a slight wind from below is provided in the hopper (15). Seed chamber (26) One side nozzle supply port (26
The nozzles (17) in the partition wall (15a) are formed integrally with each other through a partition wall (15a) at a position substantially below (a).
Each air ejection hole (27) which is an air ejection means for communicating the seed chamber (26) with the air passage (25) is formed at a position below the nozzle opening (17a) of each of the ejection holes (27). When the seeds in the seed chamber (26) are floated by the jet air of (3), the suction nozzles (17) adsorb the seeds (B).

Further, the ejection holes (2) of the seed chamber (26)
A shutter (28) whose opening and closing can be adjusted is provided between the section 7) and the seed inlet (26b) on the other side of the chamber (26) so that the amount of seeds fed into the ejection hole (27) can be adjusted. Is configured.

As shown in FIG. 5, a compressor (33) is installed in the air passage (25) via a joint (29), a manual on-off valve (30), a servo valve (31) and a pressure regulating valve (32). In communication, the opening / closing valve (30) is used for manual opening / closing operation, and the servo valve (31) is used for automatic opening / closing operation based on the vertical movement of the hopper (15) and the flow rate (air pressure) according to the seed amount. The control is performed by the seeding controller (34).

A photoelectric seed comprising a pair of a light emitting element (35a) and a light receiving element (35b) for detecting the remaining amount of the seed (B) in the hopper (15) is provided outside the seed hopper (15). A side plate (36) of the seed hopper (15) and the collection frame (24) is provided while the remaining amount sensor (35) is provided.
Is provided with a hopper upper movement position sensor (37) for detecting the upper movement of the hopper (15), and these sensors (35) (3
7) is electrically connected to the controller (34), and the hopper (1) is connected via the rotary cylinder (38), the swing arm (39), the link (40), etc. of the rotating mechanism (19).
Each time 5) is rotated by a certain angle and moved upward, air having an appropriate flow rate (pressure) is ejected from the ejection hole (27) for a certain period of time.

This embodiment is constructed as described above, and when the suction nozzle (17) is inserted into the nozzle insertion opening (16a) of the shaft body (16), the seed (B) suction operation is performed. The seed (B) in the hopper (15) is floated by the air blown from below. As shown in the flow chart of FIG.
5) When the upward movement is detected, the servo valve (31) is opened, and when the remaining amount sensor (35) detects that the seed remaining amount is above or below the appropriate value, the jetting according to the level value The amount of spouting is controlled to increase or decrease so that the amount becomes equal to the amount, and the seed (B) is made to be in a state of being floated by a slight wind force that always corresponds appropriately to the remaining amount of seed, and the seed ( While adsorbing B), the servo valve (31) is closed to stop the ejection of air when the hopper (15) is moved downward after the seed is adsorbed to the nozzle (17).

As described above, the seed (B) is floated by the air force which is ejected in synchronism with the upward movement of the hopper (15), so that the seeds (B) can be reliably and accurately irrespective of the remaining amount of seeds and the shape change. Adsorption can be made possible, and the time required for adsorption can be shortened to shorten the cycle time and improve the work efficiency.

In the above embodiment, the hopper (1
5) Although the servo valve (31) is opened and air is ejected after the upward movement of 5), the suction nozzle (17) is moved downward to enter the nozzle insertion opening (16a) (hopper). A configuration may be used in which air is ejected before (15) the upward movement.

[0015]

EFFECTS OF THE INVENTION As is clear from the above embodiments, according to the present invention, the seed in the seed hopper (15) is sucked into the nozzle (17).
In a seeding device adapted to be seeded onto a seedling-raising tray (3) by being adsorbed on the seedlings, air jetting means (2) for suspending the seeds (B) in the seed hopper (15) with an airflow.
7) is provided, and the floating seeds (B) are suction nozzles (17)
Since it is to be adsorbed on the seed hopper (15), it is possible to always ensure reliable adsorption without being affected by the amount of seed remaining in the seed hopper (15) and to maintain stable adsorption accuracy. In addition to improving the suction accuracy, the time until the suction is shortened, the cycle timer can be shortened, and the work efficiency can be improved.

[Brief description of drawings]

FIG. 1 is a cross-sectional explanatory view of a seed hopper.

FIG. 2 is an overall side view.

FIG. 3 is an explanatory view of a seeding machine.

FIG. 4 is an explanatory diagram of a seed hopper unit.

FIG. 5 is an explanatory diagram of a seeder controller unit.

FIG. 6 is a flowchart.

[Explanation of symbols]

 (3) Tray (15) Seed hopper (17) Nozzle (B) Seed

Claims (1)

[Claims] 1. A seeding device in which seeds in a seed hopper are adsorbed by a suction nozzle and seeded in a seedling-growing tray, and air jetting means for suspending the seeds in the seed hopper with an air flow is provided. A vacuum-type seeding device, which is configured to adsorb floating seeds to a suction nozzle.