JPH0412926B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a soil supply device for supplying bed soil and covering soil to a seedling raising box.

There is a seeding device for seedling boxes that performs continuous sowing work by arranging shallow drawer-shaped seedling boxes and transporting them in a predetermined direction, supplying bed soil, seeds, and covering soil to the boxes in that order. It is being

The bed soil is relatively coarse soil used to form a seeding bed, and is filled into a seedling nursery box for about 8 minutes prior to sowing. The surface of the bed soil supplied to the seedling nursery box is leveled with a leveling device such as a leveling roll, and grooves for sowing are formed as necessary. In addition, the bed soil will be irrigated as needed. On the other hand, covering soil is the soil that is placed on top of the sown seeds, and the soil used is finer than the bed soil so as not to inhibit germination, and the amount of soil used is less than that of the bed soil.

By the way, in conventional seeding equipment of this type, bed soil and covering soil are prepared separately and supplied separately to the hopper for bed soil and the hopper for covering soil, which makes it easier to manage the soil during work. It was complicated and required a lot of attention.

In view of the above-mentioned circumstances, this invention makes it possible to make do with one type of common soil for both bed soil and covering soil, and to efficiently supply soil to the bed soil hopper, which uses a large amount, and to the covering soil hopper, which uses a relatively small amount. It was made for the purpose of providing a soil supply device.

That is, the soil supply device for seedling raising boxes according to the present invention is provided with a conveyor capable of reversing the conveyance direction for supplying soil between the hopper for supplying bed soil and the hopper for supplying covering soil. A sensor is installed to detect the amount of soil, and when the amount of soil in either hopper becomes less than a predetermined amount, the conveyor is driven in the direction that soil is supplied to that hopper, and the soil in both hoppers is A conveyance direction control device is provided to drive the conveyor so that soil is preferentially supplied to the hopper for bed soil when both amounts are less than predetermined amounts. The embodiments shown in the drawings will be described below.

FIGS. 1, 2, and 3 are a front view, a plan view, and a side view of an example of a seedling box seeding device equipped with a soil supply device according to the present invention; 1, a hopper 5 for bed soil, a seeding machine 7, and a hopper 9 for covering soil are arranged in sequence above a transfer table 3 that conveys a seedling raising box 2 in the direction of arrow A. Note that the leveling device and irrigation device that are normally installed between the soil hopper 5 and the seeding machine 7 are not shown.

The upper end of the floor soil hopper 5 opens upward, and the lower end has a feeding device 1 that feeds out the soil in an appropriate amount at a time.
0 is provided, and a sensor 11 for detecting the amount of soil inside is provided on the side wall. Hotsupa 5 for floor soil
A guide hopper 13 is provided below to guide the removed soil into the seedling growing box. Directly below the guide hopper 13 and below the transfer table 3, a receiver 15 is installed for refluxing overflowing soil.

The seeding machine 7 is equipped with a hopper 17 for storing seeds and a feeding device 19, and is configured to feed an appropriate amount of seeds onto the soil bed that is filled to about 8 minutes into the seedling raising box 2. As the feeding device 19, for example, a device configured to feed out the seeds in the hopper that have entered the grooves while rotating a feeding roll having a plurality of grooves on the outer periphery for the seeds to enter can be used. Other devices using perforated plates or the like may also be used.

The soil covering hopper 9 has almost the same structure as the floor soil hopper 5, and its upper end is open upward, and its lower end is provided with a feeding device 21 for feeding out an appropriate amount of soil inside, and the side wall portion A sensor 22 is provided to detect the amount of soil. Further, a guide hopper 23 is provided below the soil-covering hopper 9 to guide the covered soil that is drawn out into the seedling-growing box.

A conveyor 25 is installed between the floor soil hopper 5 and the soil covering hopper 9. conveyor 2
Reference numeral 5 is driven by a motor 27 and a speed reduction device 29, and one end faces the inside of the hopper 5 for floor soil, and the other end faces the inside of the hopper 9 for covering soil.

A source hopper 30 for supplying soil onto the conveyor is installed above the conveyor 25. Also,
A sieving device 33 is provided between the conveyor 25 and the soil covering hopper 9. The sieve device 33 is
A sieve net section 35 directly above the soil covering hopper 9 and a feed section 36 for feeding out the sieve are provided, and these are integrally vibrated in the direction of arrow B by a vibration device 37. The terminal end of the feeding section 36 faces into the floor soil hopper 5.

A bucket elevator 41 equipped with a large number of buckets 40 is installed on the side of the transfer table 3. A supply section 42 is provided at the lower end of the elevator 41, and the supply section 42 is provided with an input port 43 having an inclined bottom plate. elevator 41
At the lower end of the hopper 44 for supplying the original soil, which is provided in the vicinity of
5 faces the input port 43 in the feeding direction. The feed conveyor 45 is driven by a motor 47. Note that the supply section 42 of the elevator 41
The receiver 15 for the bed soil reflux is connected to the receiver 15 by a pipe 48.

The elevator 41 is driven by a motor 50, and its upper end is connected to the input port 51 of the hopper 30.
is coming. In the figure, 52 is the bottom plate of the input port 51;
53 is a scraping tool rotated in the direction of arrow C by the motor 50. Further, 55 is a conveyor that carries soil into the hopper 44.

FIG. 4 shows an example of a control circuit diagram for starting the motor 27 for driving the conveyor 25. In the figure, the sensor 11 of the hopper 5 for bed soil detects that the amount of bed soil has decreased. , Switch SW ₁
When the relay R1 is turned on, the relay _R1 is energized and self-held, and the magnetic switch _MC1 is turned on, causing the motor 27 to rotate forward. Therefore, the conveyor 25 is driven in the direction of the arrow X, and the soil supplied onto the conveyor 25 from the hopper 30 is supplied into the bed soil hopper 5. Conversely, the sensor 22 of the soil covering hopper 9
detects that the amount of soil covering has decreased, and when switch SW ₂ is turned on, relay R ₂ is energized and held, contact R ₂ is closed, magnetic switch MC ₂ is turned on, and motor 27 is turned on. is reversed. Therefore, the conveyor 25 is driven in the opposite direction of the arrow X, and the soil supplied onto the conveyor 25 is supplied into the soil covering hopper 9. Also, both hoppers 5 and 9
When the amount of soil decreases at the same time and SW ₁ and SW ₂ are both turned on, R ₁ ≠, which is the b contact, opens due to the excitation of R ₁ , and since MC ₂ is not excited, the motor 27 becomes positive. Rotate to the opposite side. Therefore, soil is preferentially supplied into the bed soil hopper 5. It should be noted that the motors 27, 47, 50 are all configured to stop when both hoppers 5, 9 are full.

When using this seeding device 1, the seedling growing boxes 2 stacked in the seedling growing box holding device 60 are fed one by one onto the transfer table 3, and are sequentially fed in the direction of arrow A while being adjacent to each other. Then, the bed soil is put in directly under the bed soil hopper 5, and after the surface is leveled and watered by a leveling device and a watering device (not shown), seeds are sown directly under the seeding machine 7. The soil is covered directly under the soil covering hopper 9.
The seedling growing box that has been covered with soil is taken out at the end of the transfer table 3.

On the other hand, the raw material soil, which is divided into floor soil and covering soil, is carried up by a conveyor 55 and put into a hopper 44, and is fed out in appropriate amounts by a feeding conveyor 45 to the supply section 4 of the elevator.
Supplied within 2 days. The soil in the supply section 42 is scooped up by the bucket 40 and transported to the elevator 41.
After being carried up to the upper end of the bucket,
By reversing the hopper 30, it is thrown into the slot 51 of the hopper 30.

The soil in the hopper 30 is supplied onto the conveyor 25, and by the reversal drive of the conveyor, the soil in the hopper 30 is
Or it is supplied to the soil covering hopper 9. The soil supplied to the soil covering hopper 9 is sieved by a sieve net portion 35 of a sieve device 33 before being thrown into the hopper 9. The fine soil that has passed through the sieve is thrown into the soil covering hopper 9, and the portion on the sieve is supplied into the bed soil hopper 5 via the feed section 36 and used as bed soil. Note that the bed soil that does not enter the seedling growing box 2 and spills onto the transfer table 3 is returned to the supply section of the elevator 41 from the receiver 15 through the pipe 48.

The soil supply device S provided in this seedling box seeding device includes a conveyor 25 provided between the bed soil hopper 5 and the soil covering hopper 9, which is capable of reversing the conveyance direction.
Since the common raw material soil is distributed and supplied to the bed soil hopper 5 and the soil covering hopper 9 by this conveyor 25, only one type of soil is required and work management is easy. Only fine soil that has passed through a sieve screen is used for covering, so there is no chance of inhibiting germination. As shown in the illustrated example, if a conveyance direction control device is provided that can automatically switch the conveyance direction of the conveyor so that soil is supplied into the hopper when the amount of soil in the hopper decreases. , it is possible to effectively prevent accidents where the hopper becomes empty and soil is no longer supplied. In this case, as shown in the example shown in the figure, it is advantageous to supply bed soil first when the soil in both hoppers becomes low, as this will prevent accidents such as sowing seeds into empty seedling boxes. It is.

As explained above, the soil supply device according to the present invention can supply bed soil and covering soil using the same soil, and can also supply bed soil and covering soil with different supply amounts without causing soil shortage. It has become a practical product that can be supplied efficiently.

[Brief explanation of drawings]

FIGS. 1, 2, and 3 are a front view, a plan view, and a side view showing an embodiment of the present invention, and FIG. 4 is a circuit diagram for starting a conveyor motor. 1... Seeding device, 2... Seedling raising box, 3... Transfer table, 5... Floor soil hopper, 7... Seeding machine, 9...
Soil covering hopper, 25... conveyor, 27... motor, 30... original hopper, 33... sieving device, 4
0...bucket, 41...elevator.

Claims (1)

[Claims] 1 A soil supply device that is installed on the transport path of the seedling raising box and configured to supply bed soil and covering soil into the seedling raising box, and is configured to supply soil between the bed soil supply hopper and the covering soil supply hopper. In addition to providing a conveyor that can freely switch the conveying direction in reverse, both hoppers are equipped with sensors that detect the amount of soil inside, and when the amount of soil in either hopper becomes less than a predetermined amount, the corresponding The conveyor is driven in the direction in which soil is supplied to the hoppers, and when the amount of soil in both hoppers is less than a predetermined amount, the conveyor is set so that soil is supplied preferentially to the hopper for floor soil. A soil supply device for a seedling box, which is equipped with a conveyance direction control device that drives the soil.