JPH0524247Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention provides a switching mechanism that accurately synchronizes the operation of a seed gel coating device that encapsulates seeds and air bubbles in a gel, and that allows the synchronization timing to be easily adjusted. It is related to.

[Conventional technology and problems]

Seeds vary in size and shape, and minute seeds and irregularly shaped seeds cannot be applied to seeders.

Therefore, there are coated seeds that coat the seeds to make them larger and easier to sow, and also protect the coating layer with a coating agent containing nutrients, fungicides, etc. to increase the germination rate.

Furthermore, if the entire surface of the seed is coated, it becomes difficult to supply oxygen to the seed, so it is necessary to coat the seed with air bubbles.

For this purpose, a gel film is formed from the nozzle,
Seeds are supplied to the center of the top surface of the gel membrane while the central part is sagging due to the weight of the gel membrane itself, and then the gel membrane is stretched over it to encapsulate the seeds together with air bubbles, and the surface tension of the gel forms them into a spherical shape. A method and apparatus for forming a gel coating has been developed.

In this case, the movement of the device is complex and timing is important.

It is necessary to synchronize the gel pressing section that forms the gel film and the seed feeding section that supplies the seeds. Moreover, large seeds require large air bubbles, and the thickness of the coating layer must be adjusted to the optimum thickness depending on the seed. Need to adjust.

That is, the synchronization between the gel pressing section and the seed feeding section must be accurate, and at the same time, the synchronization timing must be easily finely adjusted depending on the seeds.

The present invention has been made for this purpose.

[Means for solving problems]

The gist of the present invention is that a cam is fixed to the rotating shaft of the drum of the seed feeding section, and a switch mounting plate is disposed close to the cam, and the switch mounting plate has a long groove concentric with the rotating shaft. 2, two limit switches are installed along the long groove so that their operating positions can be adjusted, and a gel film is formed on the gel pressing part.
The two electromagnetic valves which respectively operate the cylinders are operated by the two limit switches.

[Effect]

By slightly displacing the two limit switches along the long holes and tightening them, the operating timing of the limit switches can be finely adjusted.

Furthermore, since the long groove is concentric with the rotating shaft, there is no need to adjust the spacing with respect to the cam.

The two limit switches allow not only fine timing adjustment for the cam, but also fine timing adjustment for each limit switch.

In this way, the operation timing of the two cylinders of the gel pressing section can be finely adjusted to the timing suitable for each seed with respect to the operation of the seed feeding section.

Even if the apparatus is operated continuously and the gel coating process is repeated, the timing of each operation of the apparatus is accurate without variation.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings.

FIG. 2 is a longitudinal cross-sectional view showing the main parts of the gel coating processing device, in which a gel extrusion section A and a seed feeding section B are fixed to two side walls P provided upright on the casing of the device.

In the gel extrusion part A, as shown in FIGS. 3 and 4, a plunger insertion hole 2 is formed that vertically penetrates the nozzle body 1, and the diameter of the plunger insertion hole 2 becomes smaller toward the bottom at the bottom of the plunger insertion hole 2. A tapered valve seat 3 is provided, and a cylindrical cutting plunger 4 is fitted into the plunger insertion hole 2 so as to be movable up and down.

Cutting plunger 4 and plunger insertion hole 2
The gap between the two is small enough to prevent gel from leaking.

A flange 5 is provided around the outer periphery of the cutting plunger 4, and a spring 7 is inserted between the flange 5 and a spring receiver 6 attached to the nozzle body 1.

Therefore, the cutting plunger 4 is urged downward and the lower end of the cutting plunger 4 closes the valve seat 3.

Further, a pressure receiving part 4 is provided on the outer peripheral surface of the cutting plunger 4.
a is provided, and when the inside of the plunger insertion hole 2 is pressurized, the cutting plunger 4 pressurizes the pressure receiving part 4a and rises against the spring 7 to open the valve seat 3.

The plunger insertion hole 2 communicates with a gel flow path 8 that communicates with the side surface of the nozzle body 1, and the gel flow path 8 communicates with a gel storage space 10 provided inside the cylinder casing 9.

The cylinders 11 and 12 communicate with the gel storage space 10, and a solenoid valve 1 is installed inside the cylinders 11 and 12.
Piston 15,1 receiving air pressure via 3,14
6 is slidably inserted.

Holes communicating with gel oil supply pipes 19 and 20 via reed valves 17 and 18 are provided in the lower wall surface of the gel storage space 10, and the reed valves 17 and 18 prevent the gel from flowing only in the direction of the gel storage space 10. forgive.

Seed feeding section B arranged above gel extrusion section A
As shown in FIG. 2, a holding member 2 is attached to the side wall P.
1 and 22 are fixed, and a drum 24 is rotatably supported on the inner surfaces of the holding members 21 and 22 via a sealing material 23.

One end of the drum 24 is open, and a rotating shaft 26 is integrally attached to the other end via a side wall 25.
A belt 30 is wound around a pulley 27 attached to a geared motor 6 and a pulley 29 attached to an output shaft of a geared motor 28.

At the end of the rotating shaft 26, as shown in FIG.
Cam 31 is fixed.

A limit switch mounting plate 32 in the shape of a hollow disc is attached to the side plate Q of the casing close to the cam 31.

The limit switch mounting plate 32 is provided with a plurality of arcuate long grooves 33 concentric with the rotating shaft 26, and limit switches 34 and 35 are fitted into the long grooves 33 and fixed by means such as screws.

Therefore, the limit switches 34 and 35 are connected to the long groove 3.
However, since the long groove 33 is concentric with the rotating shaft 26, there is no need to adjust the distance from the cam.

In addition, the two limit switches are used not only for fine timing adjustment of the cam, but also for limit switch 3.
4 and 35, the mutual timing can be finely adjusted.

The holding member 22 has a conduit 36 leading to a suction pump (not shown), and behind the drum 24, as shown in FIGS. 5 and 6, a seed storage tank 37 is disposed in a casing to store seeds. The seeds 38 contained in the storage tank 37 come into contact with the drum 24.

A small hole 39 is bored in the peripheral wall of the drum 24, and when the inside of the drum 24 becomes negative pressure, seeds 38 are attracted to the small hole 39, but since the small hole 39 is minute compared to the seed 38, only one seed is absorbed. Only the seeds of the drum are absorbed into the drum.

A holding member 22 is provided at the lowest part of the inner peripheral surface of the drum 24.
When the end surfaces of the closing member 40 attached to the drum 24 come into contact with each other, and the small hole 39 comes to the lowest part of the drum 24 due to the rotation of the drum 24, the end surface of the closing member 40 closes the small hole 39, and the hole 39 closes the small hole 39. loses its ability to adsorb
The seeds 38 are designed to fall from the drum 24 and into the cylinder of the cutting plunger 4.
In FIG. 2, in order to ensure that the seeds 38 fall, a hole 40a is provided inside the closing member 40, and the hole 40a is connected to a compressed air conduit 41.
When the small hole 39 reaches the bottom end, the small hole 39 becomes the hole 40a.
The compressed air flows into the small hole 39 and seeds 3
8 is blown downward.

The operation of the gel coating processing apparatus and switching mechanism configured as above will be explained.

When the geared motor 28 rotates, the belt 3
1, the rotating shaft 26 rotates through the rotating shaft 26, and the cam 31 fixed to the end of the rotating shaft 26 rotates counterclockwise as shown in FIG. Hit 35 once.

When the limit switch 34 is hit, the solenoid valve 1
3 is activated, the piston 15 moves toward the gel storage space 10 at the center of the cylinder casing 9, and pushes out the gel in the gel storage space 10 into the gel flow path 8.

This operation is schematically shown as shown in FIG. The lower end of the cutting plunger 4 is separated from the valve seat 3 and opened.
The gel flows out along the tapered surface of the valve seat 3 to form a layer of gel film 42 (see FIG. 7B).

When the piston 15 reaches the left movement end, the solenoid valve 1
3 is activated, the piston 15 moves rightward and returns to the right moving end, and at the same time the gel storage space 10 becomes negative pressure and the reed valve 17 opens and the gel oil supply pipe 19
The gel is supplied to the gel storage space 10, and the cutting plunger 4 returns downward due to the pressing force of the spring 7 to close the valve, but the gel film 42 does not fall due to the adhesive force.

At this time, the small holes 39 of the drum 24 reach the lowest position while adsorbing the seeds 38, and the closed portion 40 and the small holes 39 overlap, and the small holes 39 lose their suction power and the holes 39
The seeds 38 are blown downward by the compressed air from 0a, pass through the cylinder of the cutting plunger 4, and fall onto the gel film 42 (see FIG. 7C).

The timing of the formation of this gel film 42 and the fall of the seeds 38 is controlled by the limit switch 3 relative to the cam 31.
4 by adjusting the position along the long groove 33.

After the seeds 38 fall onto the gel film 42, the cam 31 hits the limit switch 35, the solenoid valve 14 is activated, the piston 16 moves to the right, the valve opens again, and the gel flows out (see Figure 7 D). ).

The size of the air bubbles 43 formed inside by the gels of the first and second layers can be controlled by the timing of the gel outflow of the second layer and the outflow speed of the gel.

The required volume of the air bubbles 43 varies depending on the size of the seeds, but by adjusting the position of the limit switch 35, the timing of forming the second layer of gel can be adjusted arbitrarily, so one seed processing device can be used. Various seeds can be coated with this method.

Covered with the second layer of gel, the seeds 38 are covered with air bubbles 4
The gel encapsulated together with 3 sag due to its own weight and gradually becomes spherical due to surface tension.

Next, when the solenoid valve 14 is actuated by a timer or the like to return the piston 15 to the left side, the gel storage space 10 becomes negative pressure, the reed valve 18 opens, and gel is supplied from the gel oil supply pipe 20 to the gel storage space 10. At the same time, the cutting plunger 4 returns downward due to the pressing force of the spring 7 and opens the valve, and the gel coating, which can no longer support its own weight, falls, and as it falls, it becomes spherical due to surface tension and the curing liquid in the curing tank below. (See Figure 7, E).

In this way, one cycle of seed coating is completed for each rotation of the rotating shaft 26, and as the rotating shaft 26 continues to rotate, seed coating is efficiently performed one after another.

〔effect〕

The switching mechanism of the present invention has the following effects.

(1) A long groove is provided on the switch mounting plate that is concentric with the rotating shaft, and a limit switch is attached to the long groove to adjust the operating position with the cam fixed to the rotating shaft, thereby adjusting the timing between gel film formation and seed supply. can be arbitrarily and easily adjusted.

(2) The switching mechanism of the present invention has an extremely simple structure, has no risk of failure, operates reliably, and is suitable for continuous production.

(3) This switching mechanism allows a single gel coating device to perform optimal gel coating on various seeds.

[Brief explanation of the drawing]

1 to 7 show embodiments of the present invention.
The figure is a side view of the main parts of the switching mechanism, Fig. 2 is a longitudinal sectional view of the main parts of the gel coating processing device, Fig. 3 is a sectional front view of the main parts of the gel extrusion section, and Fig. 4 is a longitudinal sectional view of the same as above. FIG. 5 is a plan view of the seed feeding section, FIG. 6 is a longitudinal sectional view of the same, and FIG. 7 is a schematic diagram for explaining the seed coating process. A... Gel extrusion section, B... Seed feeding section, 1...
Nozzle body, 2... Plunger insertion hole, 3...
Valve seat, 4... Cutting plunger, 7... Spring, 8
... Gel channel, 9 ... Cylinder casing, 10
... Gel storage space, 13, 14 ... Solenoid valve, 1
5, 16... Piston, 17, 18... Reed valve, 21, 22... Holding member, 24... Drum, 26... Rotating shaft, 31... Cam, 32... Limit switch mounting plate, 33... Long groove ,34,3
5... Limit switch, 37... Seed storage tank,
38...Seed, 39...Small pore, 40...Closing member, 42...Gel film, 43...Bubble.

Claims (1)

[Scope of utility model registration request] A cylindrical cutting plunger is inserted into a plunger insertion hole that penetrates in the vertical direction and forms a valve seat at the lower end, and a gel flow path communicating with the plunger insertion hole is provided, and by increasing the pressure of the gel inside the gel flow path, the above It has a nozzle body that opens the cutting plunger by lifting it up and forms a gel film below the cutting plunger, and two cylinders that pump gel into the gel flow path by operating two electromagnetic valves. A closing member that closes the small hole when the small hole comes downward is provided inside the drum which has a gel pressing part and a small hole for sucking seeds in a cylindrical peripheral wall and a rotating shaft on one side. and a seed feeding section that supplies the seeds that have fallen from the small hole onto the gel film, in which a cam is fixed to the rotating shaft and a switch mounting plate is disposed close to the cam. The switch mounting plate is provided with a long groove that is concentric with the rotating shaft, and two limit switches that respectively operate two electromagnetic valves are mounted in the long groove so that the operating positions can be adjusted, and the rotating cam is After activating one of the limit switches to form a gel film, the seeds fall onto the gel film, and the other limit switch is activated to form a gel film on the seeds, so that the seeds are covered with the gel together with air bubbles. A switching mechanism for a gel coating device for seeds is characterized in that the switching mechanism is synchronized as follows.