JPH0547547Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) This invention is applicable to a sowing machine that sows agricultural crop seeds at regular intervals in a predetermined position in the soil, and a seed rice manufacturer that manufactures seed rice by wrapping seeds in tape at regular intervals. In the device,
This invention relates to a suction seed forced release device that removes seeds from a seed suction and carry-out device in order to drop the seeds taken out by suction from a hopper onto soil or tape.

(Conventional technology) Conventionally, seeds were taken out from hops and placed at regular intervals.
As a device for sowing a certain number of seeds on soil or placing them on a tape for seed rice, the circumferential surface of a rotating drum 10 as shown in FIG. 3 is constructed with a ring-shaped belt 12 as shown in FIG. 4. Then, suction holes 11 are opened at continuous intervals on the circumferential surface of the drum, negative pressure is created in the internal space of the drum, and hoppers 13 in contact with the suction holes 11 are formed.
Suction the seeds 6 inside and rotate in the direction of arrow P in the figure.
There is a device that closes the suction hole 11 with a negative pressure cutoff valve 21 from inside the drum when it reaches a predetermined position, thereby losing the suction force due to the negative pressure and releasing the seeds 6.

(Problem to be solved by the invention) As mentioned above, the conventional rotating drum attracts seeds to its suction holes and rotates, and when it reaches a predetermined position, the negative pressure from inside is cut off and the seeds are released. The method is extremely efficient and provides faster processing speeds than other previous devices.

However, when using this method, the disadvantage is that depending on the shape of the seeds, they may get stuck in the suction port, so they may not separate from the ring-shaped belt that forms the circumferential surface of the rotating drum and has a series of suction holes. be.

The present invention eliminates these drawbacks and is capable of forcibly removing seeds by suction, so that when seeds are discharged from a seed suction and transport device, the seeds are not caught in the device and can be reliably and quickly removed. The purpose is to provide equipment.

(Means for Solving the Problems) In order to achieve the above object, the suction seed forced release device according to the present invention has a hopper 13 for supplying seeds 6.
and a circumferential surface 1 in which a large number of suction holes 11 for adsorbing seeds 6 are continuously provided on the seed group housed in the hopper 13.
2, a rotating drum 10 that rotates while in contact with each other, an exhaust mechanism that makes the internal space of the rotating drum 10 a negative pressure space, and a negative pressure cutoff that blocks the suction hole 11 from the inside of the rotating drum 10 and blocks the negative pressure in the space. It has a valve 21 and sucks the seeds 6 in the hopper 13 into the suction hole 11 in contact with the seeds 6 by the negative pressure in the space,
When the rotary drum 10 rotates and the position of the suction hole 11 that sucks the seeds 6 comes to the position of the negative pressure cutoff valve 21, the negative pressure cutoff valve 21 cuts off the negative pressure in the space and the seeds 6 are sucked. In the seed suction and carry-out device configured so that the seeds 6 that have been stored are separated from the rotating drum 10, a negative pressure cutoff valve 21 cuts off the negative pressure through the suction hole 11.
The structure is such that a vibrating device 1 is provided near the rotary drum 10 to apply vibration by hitting the rotary drum 10 from the outside.

(Example) Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, and is a front (cross-sectional) view taken along line XX in FIG.

2 is a left side (partially cut away) view of the embodiment of FIG. 1. FIG.

As shown in FIGS. 1 and 2, in the adsorbed seed forced release device of this embodiment, a hopper 13 that accommodates seeds 6 is arranged so that a group of seeds comes into contact with a ring-shaped belt 12.

The ring-shaped belt 12 is made of a thin plate, and has a large number of consecutive suction holes 11 each having a diameter smaller than the diameter 8 of the seeds 6, as shown in FIG.

Further, the ring-shaped belt 12 is in contact with two discs 14 and 15 having opposing rims, and the ring-shaped belt 12 and the two discs 14 and 15 form a rotating drum 10.

This rotating drum 10 is rotatable and is driven by a motor 1.
Since the disc 14 is rotated by the drive roller 17 attached to the ring belt 1
2 and another disk 15 are also rotated, and the entire rotating drum 10 rotates as a unit about the fixed shaft 18 in the direction of arrow P in the figure.

Although the structure of the ring-shaped belt 12 is not particularly shown, it is removable and comes in a variety of sizes with different diameters and pitches of the suction holes 11 depending on the purpose. It is installed so that it can be selected and replaced.

The fixed shaft 18 is a hollow tube with one end closed.
Air flow holes 19 are provided that communicate with the hollow interior of the tube and the exterior.

A vacuum source, which is an evacuation device such as a vacuum pump, is connected to the other end of the fixed shaft 18, and the vacuum source connects the ring-shaped belt 12 and the disc 14 through the air circulation hole 19 and the hollow part of the fixed shaft 18. , 15 is sucked into the rotating drum 10 to form a negative pressure chamber. Further, a support arm 20 is fixed to the fixed shaft 18, and a rotary roller 21 is attached to the tip of the support arm 20 as a negative pressure cutoff valve.

Since the support arm 20 has a hinge structure 22 and a spring 23, the rotating roller 21 is always pressed against the inner surface of the ring-shaped belt 12, and the roller surface is constantly in close contact with the inner surface of the belt even when the ring-shaped belt 12 is rotating. It closes the suction hole 11 that has just arrived at that position, and serves to cut off the negative pressure inside the rotating drum 10.

Note that the ring-shaped belt 1 of this rotating roller 21
A suitable material for the surface in contact with 2 is soft rubber or slightly foamed sponge.

Further, a cover 24 is attached between the lowermost part of the ring-shaped belt 12 and the hopper 13 to prevent air from entering through the suction hole 11.

Next, the structure of the vibration device, which is a feature of the present invention, will be explained.

As shown in FIGS. 1 and 2, the vibration device 1 further includes a ring-shaped belt at the tip of a metal vibration bar 4 attached to a movable part 3 of a vibrator 2 that generates minute vibrations. A striking bar 5 which strikes and vibrates the surface of 12 is connected.

The lower part of the vibrator 2 is fixed, and the movable part 3 vibrates at the commercial frequency or twice its frequency in the direction indicated by the arrow in the figure due to electromagnetic force. The amplitude is 0.1 mm, and the vibration is transmitted to the striking bar 5 via the vibrating bar 4.

The tip of the striking bar 5 faces the negative pressure cut-off valve 21 with the ring-shaped belt 12 in between, and when the vibrator is vibrated, the tip of the striking bar 5 is located near the suction hole 11 that is closed by the negative pressure cut-off valve 21, and is closed by the suction hole 11. It is arranged so as to strike a position slightly away from the seeds 6 being sucked into the holes 11.

Therefore, due to the vibration of the vibrator 2,
When the surface of the ring-shaped belt 12 is struck, only the suction hole 11 and its surrounding area, where negative pressure is cut off by the negative pressure cutoff valve 21, are vibrated. Although the seeds 6 in the rotary drum 10 and other parts are vibrated, the seeds 6 in the rotating drum 10 and other parts are hardly affected.

In this embodiment, the ring-shaped belt 12 is made of extremely thin stainless steel, and the striking bar 5 is made of resin, so that the ring-shaped belt 12 will not be damaged even if used for a long time.

Next, the operation will be explained.

First, seeds 6 are placed in the hopper 13, and while the air inside the drum is sucked by the vacuum source, the motor 16
When the rotating drum is rotated by the ring-shaped belt 12, the seeds 5 near it are attracted to the suction holes 11 provided in the ring-shaped belt 12, but the ring-shaped belt 12 rotates while contacting the seeds 6 in the hopper 13. As a result, the attracted seeds 6 are separated from other seed groups and move together with the ring-shaped belt 12 in the direction of rotation of the rotary drum 10 shown by arrow P in FIG.

When the seeds 6 move and come to a position where they face the rotating roller 21 which is rotating while being pressed against the ring-shaped belt 12 from the inside, with the ring-shaped belt sandwiched therebetween,
Since the inside of the suction hole 11, which has been sucking the seeds 6, is blocked by the rotating roller 21, the suction hole 11 loses its suction force because it is cut off from the negative pressure inside the rotating drum.
At that position, the seeds 6 tend to separate from the ring-shaped belt 12 due to their own weight and the centrifugal force exerted by the rotation of the drum.

At this time, depending on the combination of the shape of the seeds 6 being sucked and the shape of the suction hole 11, the seeds 6 may get caught in the suction hole 11 and may be delayed in separating, and may not fall to a predetermined position and may become scattered. comes out.

In such a case, by activating the vibrating device 1, vibrating the vibrator 2, and vibrating the vicinity of the suction hole 11 that is at a predetermined position with the striking bar 5, the seeds 6 can be removed. Since it helps the seeds 6 to be separated from the ring-shaped belt 12, the seeds 6 can be reliably dropped to a predetermined position.

In addition, as mentioned above, the vibration by this vibration device excites only the necessary narrow range and has almost no effect on other parts, so while the seed suction and discharge device is operating, the seeds 6 Regardless of the shape, size, weight, etc., there is no problem even if the vibration device is used all the time.

Note that the shape, size, vibration frequency, and vibration amplitude of the vibrator 2 may be different from those described above, and may be appropriately selected depending on the device to which this embodiment is applied.

(Effects of the invention) The adsorbed seed forced release device according to the invention uses the inner space of the rotating drum as a negative pressure chamber, and uses negative pressure to sequentially adsorb seeds that are in contact with a series of many suction holes provided on the circumferential surface of the drum. When the seeds that have been absorbed as the rotary drum rotates reach a predetermined position, the suction hole is blocked from the inside to cut off the negative pressure and the seeds are removed from the device. It is configured to vibrate near the location.

Therefore, unlike in the past, depending on the shape of the seeds, they may get caught in the suction holes and release is delayed, causing the seeds to not fall to a predetermined position and become scattered. Even when rotating, there is no loss of accuracy at the correct position and pitch interval.
This has the effect of being able to reliably transport an extremely wide variety of seeds.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of the present invention, and is a front (cross-sectional) view taken along line XX in FIG. 2 is a left side (partially cut away) view of the embodiment of FIG. 1. FIG. FIG. 3 is a front (cross-sectional) view showing an example of a conventional seed suction and discharge device. FIG. 4 is a perspective view of a ring-shaped belt used in the conventional example shown in FIG. DESCRIPTION OF SYMBOLS 1... Vibration device, 2... Vibrator, 3... Movable part, 4... Vibration bar, 5... Hitting bar, 6...
Seed, 10... Rotating drum, 11... Suction hole, 1
2...Ring hole belt, 13...Hopper, 14,
15... Disk, 16... Motor, 17... Drive roller, 18... Fixed shaft, 19... Air circulation hole, 2
0... Support arm, 21... Rotating roller (negative pressure cutoff valve), 22... Hinge structure, 23... Spring,
24...Cover.

Claims (1)

[Scope of utility model registration request] A hopper for supplying seeds, a rotary drum that can rotate while being in contact with a group of seeds stored in the hopper on a circumferential surface having a number of consecutive suction holes for adsorbing seeds, and an internal space of the rotary drum. It has an exhaust mechanism that creates a negative pressure space, and a negative pressure cutoff valve that closes the suction hole from the inside of the rotating drum to shut off the negative pressure in the space, and the suction hole that contacts the seeds removes the seeds in the hopper. When the negative pressure in the space causes suction, the rotary drum rotates, and the position of the suction hole sucking the seeds comes to the position of the negative pressure cutoff valve, the negative pressure cutoff valve closes the In the seed suction and discharge device configured to shut off the negative pressure in the space so that the seeds that have been sucked leave the rotating drum, the negative pressure cutoff valve shuts off the negative pressure in the vicinity of the suction hole. A device for forced separation of adsorbed seeds that is equipped with a vibration device that applies vibrations by hitting the drum from the outside.