JPH04304808A - Seeding device for raising of seedling - Google Patents

Abstract

PURPOSE:To obtain the title device capable of accurately sowing seeds in a seeding dented part in each seedling raising box by laying a specific sensor of detecting the rear end of a seedling raising box between a sensor of detecting delivery of seedling raising box and a sensor of detecting reaching of seedling raising box to a seeding position. CONSTITUTION:When a seedling raising box 7 is delivered to a device, a sensor 23 is made ON to work a seedling raising box transporting mechanism 15 and a seeding plate driving mechanism 16. When a sensor 24 detects presence of the seedling raising box, a slider 19 and a seedling plate 3 are reciprocated. When the seedling raising box are not transported to a seeding position H and the sensor 23 is made OFF, a sensor 25 maintains working of the seedling raising box transporting mechanism 15 until the rear end of the seedling raising box is passed. Then when the sensor 23 is made ON by delivery of the following seedling raising box, the seedling raising box is retained from the rear end of the previous seedling raising box at an interval corresponding to the interval between the sensors 23 and 25.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a seedling-raising seeding device that sows seeds using a seedling-raising box whose interior is divided vertically and horizontally in order to produce potted seedlings of lettuce, cabbage, broccoli, Chinese cabbage, etc. It is.

0002

[Prior Art] In a conventional seedling seeding device for potted seedlings, the inside of a seedling box is divided vertically and horizontally to form a pot section, so that the seeds are not moved by watering, covering with soil, etc. A seeding recess is formed at the center of the upper surface of the bed soil in the pot section, and seeds are sown into the seeding recess. The seed roll is rotated in synchronization with the conveyance, and the seeds are dropped from the recess directly below the sowing roll.
The seedlings are supplied row by row to the sowing recesses of the seedling raising box.

0003

[Problems to be Solved by the Invention] With the above-mentioned conventional technology, there is no problem in sowing relatively large seeds such as rice, but it is difficult to sow seeds such as lettuce, cabbage, etc. that are small even if coated. When sowing 1 to 3 seeds at a time, the sowing roll is rotating, so if the recess is made small, it will be difficult for seeds to enter from the hopper. It has become difficult to accurately feed the drop while synchronizing it.

[0004] Therefore, a seeding plate having a large number of seed holes for storing seeds of a desired size is moved linearly back and forth in the direction of transport of the seedling box from a seed receiving position to a seed releasing position, and the seedling box is intermittently moved at a constant pitch. It is possible to transport it. However, if the seedling boxes are transported intermittently during sowing in this way, when the transport of the seedling boxes into the device stops for some reason and then restarts, it will take time for the stopped seedling boxes to start moving. As a result, the seedling raising boxes sent from the soil bed device may collide with each other, displacing the previous seedling raising box from the sowing position, making accurate sowing difficult.

[0005] The present invention detects the introduction of the seedling box into the device by a detection means, and intermittently transports the seedling box by the seedling box transport mechanism.
This detection means is provided with a sensor that maintains the operation of the seedling box transport mechanism until the rear end of the seedling box passes after the carry-in detection sensor is turned off, so that even if the carrying of the seedling box is stopped for some reason, To provide a seedling-raising sowing device which can accurately sow seeds in the sowing recesses in each seedling-raising box without causing a new seedling-growing box to collide with the previous seedling-growing box when restarting next time.

[0006]

[Means for Solving the Problems] Specific means for solving the problems in the present invention include a seed storage section 4 formed in the hopper 11, and a seed storage section 4 disposed at the bottom of the seed storage section 4 of a required size. 1, a seeding plate 3 having a large number of seed holes 2 for storing seeds;
A fixed base 5 supports the seeding plate 3 so as to be able to reciprocate in the direction of transporting the seedling box, and a seed drop opening 6 is disposed below the seed drop opening 6 formed on the outside of the corresponding part of the seed storage part 4 of the fixed base 5. A chute 8 that guides the seedling growing box 7 to the seedling growing box 7, a seedling box conveying means 15 that intermittently transports the seedling growing box 7, and a seedling box conveying means 15 that is synchronized with the transportation of the seedling growing box 7 from the time the seedling growing box 7 is brought in until it is taken out. a seeding plate drive mechanism 16 that drives the seeding plate 3 to reciprocate the seed hole 2 from the inside of the seed storage section 4 to a position corresponding to the seed drop opening 6;
The seedling box transport mechanism 1 detects the loading/unloading of the seedling box 7.
5 and a detection means 22 for operating the seeding plate drive mechanism 16, the detection means 22 includes a first sensor 23 for detecting the introduction of the seedling box 7 and operating the seedling box transport mechanism 15, and a first sensor 23 for operating the seedling box transport mechanism 15. a second sensor 24 that detects the arrival of the seeding plate 7 and drives the seeding plate 3 by the seeding plate drive mechanism 16;
, and a third sensor 25 located between the two sensors 23 and 24 to maintain operation of the seedling box transport mechanism 15 until the rear end of the seedling box 7 passes after the first sensor 23 is turned off. It is.

[0007]

[Operation] When the seedling raising box 7 is carried into the device, the first sensor 2
3 detects this, activates the drive source, and uses the power to operate the seedling box transport mechanism 15 and the seeding board drive mechanism 16. When the seedling raising box 7 is intermittently transported by the seedling raising box transport mechanism 15 and reaches the seeding position, the second sensor 24 detects the presence of the seedling raising box 7 and moves the slider 19 of the seeding board drive mechanism 16 and the seeding board 3.
are integrally moved back and forth in the direction of conveyance of the seedling box on the fixed table 5.

As the seeding plate 3 reciprocates, a large number of seed holes 2 formed therein enter a seed storage section 4 formed below the hopper 11, and a required number of seeds 1 are stored therein. Since the large number of seed holes 2 move in a straight line and stop momentarily when switching from forward movement to backward movement, the seeds 1 are stored accurately. When the seeding plate 3 moves back and the seed hole 2 moves to a position facing the seed drop opening 6 formed on the outside of the part corresponding to the seed storage part 4 of the fixed base 5, the lower part of the seed hole 2 is opened. Seed 1 falls. At this time as well, the sowing plate 3 momentarily stops because the direction of movement is reversed, and the seeds 1 are reliably discharged.

If the seedling box 7 is not carried into the seeding device H for some reason, the first sensor 23 is turned off, but the third sensor 25 maintains the operation of the seedling box transport mechanism 15 and the seedling box 7 is After the rear end passes the third sensor 25, the seedling raising box transport mechanism 15 stops. Next, seedling box 7
When the conveyance of the seedlings is resumed and the first sensor 23 is turned ON, a distance approximately corresponding to the distance between the first and third sensors 23 and 25 is formed between the rear end of the stopped seedling growing box 7 and the new seedlings are brought in. Rear-end collision of box 7 is avoided.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. In FIGS. 6 and 7, the overall configuration of the seeding machine A is such that a conveying device B is built into the machine frame 30, and a soil bed device C, a pressing roller D, a scraper E, a soil bed brush F, and a seeding recess forming device G are provided on top of the transport device B. , a seeding device H, an irrigation device J, a soil covering device K, and a soil covering brush L are installed.

The seedling raising box 7 is constructed by inserting a cell tray 32 into an outer box 31, and the inside is partitioned vertically and horizontally by the cell tray 32, and a large number of pot portions 9 are arranged vertically and horizontally. This seedling raising box 7 is first placed on the first belt conveyor 33 of the transport device B, and the required amount of soil is supplied through the soil bed device C, and after being compressed by the pressing roller D, Excess soil is removed by a scraper E that comes into sliding contact with the upper surface, and then the amount of bed soil is optimized by a bed soil brush F.

The seeding recess forming device G has a large number of protrusions 35 arranged on the outer periphery of a molding roller 34 in the axial and circumferential directions, and is synchronized with the conveying speed of the seedling box 7 by power from the first belt conveyor 33. and rotate. The rotating protrusion 35 allows the seedling box 7 sent from the bed soil device C to
In this case, seeding recesses 36 of a required depth are continuously formed in one horizontal row at the center of the top surface of the soil bed of each pot part 9. The outer circumferential surface of the patterning roller 34 is in sliding contact with the soil brush F and is constantly cleaned.

After the seedling recesses 36 have been formed, the seedling raising box 7 is sent to the seeding device H, and is intermittently fed by two pitches by the seedling raising box transport mechanism 15 of the sowing device H, so that the seedling raising box 7 is simultaneously placed in each of the seeding recesses 36 of the two rows of pot sections 9. to be sown. The seedling raising box 7 after sowing is transported by the second belt conveyor 37 of the transport device B, the required amount of water and chemicals are supplied by the irrigation device J, the soil is supplied by the soil covering device K, and the surface of the seedling is covered with the soil by the soil covering brush L. is evened out.

In the seeding device H shown in FIGS. 1 to 5 and 7,
The left and right side walls 41 of the device frame 40 are fixed to the machine frame 30, the operation box 42 and the hopper 11 are fixed to the upper part of the device frame 40, and the motor M and the fixing base 5 are fixed to the middle part of the left and right side walls 41. installed. The fixed table 5 is inclined upward in the direction N of transporting the seedling box (front direction), and a seeding plate 3 is disposed on its upper surface so as to be able to reciprocate in the direction N of transporting the seedling box. This seeding plate 3 and hopper 1
A seed storage portion 4 is formed between the seed storage portion 1 and the seed storage portion 4 . Seed storage section 4
is partitioned by left and right side walls 41 and front and rear partition members 12F and 12R, and the seeding board 3 serves as the bottom wall,
Seeds 1 supplied from a hopper 11 are temporarily stored. The seeds 1 are coated seeds or bare seeds, and are stored at least on the lower rear side in the seed storage section 4, and are separated from the partition member 1 on the front side.
Seed 1 may not exist near 2F. The partition member 12 can be formed of a brush or a plate, and it is preferable that the partition member 12F on the front side is formed of a brush.

The seeding plate 3 is provided with a plurality of guide wheels 43 rotatably supported by a side wall 41 to ensure smooth reciprocating movement, regulation of the left and right position, and prevention of separation from the fixed base 5. This seeding plate 3 has a large number of seed holes 2 formed in one horizontal row. The number of seed holes 2 is set to be an integral multiple, for example twice, of the number of pot portions 9 in one horizontal row of the seedling raising box 7.

The range of reciprocating movement of the seeding plate 3 is from the position where the seed hole 2 is located at the rear lower part of the seed storage section 4 to the position where the seed hole 2 is separated from the seed storage section 4 to the outside. The stroke is such that a required number of seeds 1 can be reliably stored in the storage part 4, and the seeds 1 can be taken out to a detached position outside the seed storage part 4 with surplus seeds removed. A large number of seed holes 2 are formed in one row, and the seeds 1 can be stored under the same conditions in the seed storage section 4 and removed from the seed storage section 4 at the same time, so the stroke may be short.

At the front upper part of the fixed base 5 that supports the seeding board 3, there is a seed drop opening 6 outside (separation position) of the corresponding part of the seed storage part 4.
is formed so that the seed hole 2 separated from the seed storage section 4 can face each other. When the seed hole 2 faces the seed drop port 6, the seeds 1 stored in the seed hole 2 fall from the seed hole 2 through the seed drop port 6. A large number of chutes 8 made of plastic or metal are provided below the seed drop opening 6 of the fixed table 5. Each shoot 8 is arranged in one row so that its upper part can face the seed hole 2, but its lower part is divided into two rows (multiple groups) in the transport direction of the seedling boxes 7. It is possible to simultaneously face each seeding recess 36 of the pot section 9 in the row.

A slider 19 is disposed in the front and upper extension direction of the fixed base 5. As shown in FIG. This slider 19 is the sowing plate 3
Similarly, a plurality of upper and lower guide wheels 43 rotatably supported by the side wall 41 ensure smooth reciprocating movement and lateral position regulation. A rack 44 is attached to the lower surface of this slider 19, and a pinion 4 provided on a rotating shaft 45
It meshes with 6. A gear 47 and a disk 48 are attached to the output shaft of the motor M fixed to the side wall 41 and the rotating shaft 45, and are connected to each other by a crank rod 49. Rotation of the motor M causes the pinion 46 to reciprocate. This allows the slider 19 to move back and forth in a straight line.

A pair of left and right clutch pawls (engaging bodies) 20 are pivotally supported on the upper surface of the slider 19 via a shaft 51.
It is connected via a link 54 to both ends of a rotating body 53 which is similarly supported via a shaft 52 . Also, slider 19
A solenoid (engaging body actuator) 21 is also attached to the top surface, and the iron core of this solenoid 21 is connected to a rotating body 53. By energizing the solenoid 21, the tips of the left and right clutch pawls 20 are swung in opposing outward directions. (moves to the solid line position in FIG. 3).

An engagement recess 55 and a guide surface 56 are formed at the tip of each of the left and right clutch pawls 20. This engagement recess 55 is formed when the slider 19 advances toward the seeding plate 3 side.
It engages with the pin 57 on the upper surface of the seeding plate 3, and by engaging, the seeding plate 3 is connected to the slider 19 so as to slide integrally therewith. During this connection, the guide surface 56
7 to guide the engagement of the engagement recess 55. and,
By demagnetizing the solenoid 21, the clutch pawl 20
The engaging recess 55 is swung in the direction of detaching from the pin 57.

A tension spring (returning member) 49 is provided between the seed plate 3 and the fixed base 5 to return the clutch pawl 20 and the detached seed plate 3 to the home position, and assists the return movement of the seed plate 3. ing. Therefore, the slider 19 mainly serves to move the sowing plate 3 forward, and when the clutch pawl 20 is disengaged, the sowing plate 3 is in a state where the seed holes 2 are located in the seed storage section 4 (home position). Retained.

The seed plate drive mechanism 16 is composed of the motor M, the slider 19, the clutch pawl 20, the solenoid 21, the tension spring 49, and the like. On the outside of the device frame 40, a seedling-growing box transport mechanism 15, which constitutes a part of the transport device B, is arranged. This seedling box transport mechanism 15 is driven by a motor M, and the side wall 41
A frame-shaped movable body 17 is formed by a pair of interlocking rods 61 supported on the outer surface of the frame via rollers 60 so as to be movable back and forth, and one front and two rear support rods 62 installed between the left and right interlocking rods 61. consists of
Each support rod 62 is provided with a pair of left and right engaging claws 18 so as to be swingable. Two guide rails 68 are provided on the machine frame 30 via a mounting plate 67, so that the seedling growing box 7 can be transferred from the first belt conveyor 33. 6
Reference numeral 9 denotes a position setting plate that sets the lowest position so that the engaging claw 18 does not droop, and is fixed to the support rod 62.

A rotating shaft 63 is supported on the device frame 40, and a gear 64 provided at one end of this rotating shaft 63 is connected to a motor M.
A disk 65 provided at the other end is connected to the interlocking rod 61 via a crank rod 66. Therefore, when the motor M rotates, the interlocking rod 61 is linearly reciprocated back and forth, and all the engaging claws 18 are driven back and forth.

The left and right engaging claws 18 are oriented forward and downward,
It can be freely engaged with and detached from the pot portions 9 on the left and right sides of the cell tray 32, and when moving forward, it engages with the pot portion 9 to raise the seedling box 7 into two.
It moves forward by a stroke corresponding to the pot part 9 of the row, and when moving backward, it only slides on the upper surface of the cell tray 32, thereby intermittently transporting the seedling box 7. A detection means 22 is provided on the device frame 40 and the machine frame 30, and this detection means 22 has three sensors 23, 24, 25 whose position in the seedling box transport direction can be adjusted. The first sensor 23 is located furthest in the front (rear) in the loading direction, and detects loading of the seedling box 7 into the seeding device H, and activates the motor (power source) M.
Activate. The second sensor 24 is located near the chute 8 and excites the solenoid 21 of the seeding board drive mechanism 16 by detecting the seedling raising box 7 that has reached the seeding position.

The third sensor 25 is connected to the first and second sensors 23 and 2.
4, to prevent rear-end collisions with subsequent seedling raising boxes 7. That is, the third sensor 25 is ON when detecting the seedling raising box 7.
, and the operation of the motor M is maintained even if the first sensor 23 is turned off. However, when the supply of the seedling growing box 7 is interrupted and the first sensor 23 is turned off, and the third sensor 25 is removed from the rear end of the last seedling growing box 7 and turned off, the motor M stops. Next, a new seedling raising box 7
When the motor M is carried in and the first sensor 23 turns ON, the motor M
is activated, and the seedling box transport mechanism 15 is driven. At this time, even if the engaging claw 18 is in the return stroke and the seedling growing box 7 cannot be sent immediately, two sensors 23 and 25 are installed between the tip of the new seedling growing box 7 and the rear end of the last seedling growing box 7. A gap set by the interval is formed, and the new seedling growing box 7 is the last seedling growing box 7.
Rear-end collision is avoided.

Next, a series of operations in seeding machine A will be explained. A cell tray 32 is inserted into the outer box 31 to form a seedling growing box 7, and this is placed on the first belt conveyor 33 of the transport device B and transported. The seedling raising box 7 to be transported first passes through a bed soil device C, is supplied with the required amount of bed soil, and is moved by a pressing roller D.
After the soil is compacted, the excess soil is removed by a scraper E that comes into sliding contact with the upper surface of the cell tray 32, and then the bed soil volume is optimized by a bed soil brush F.

The seedling raising box 7 containing a predetermined amount of bed soil enters the seeding recess forming device G while being conveyed by the first belt conveyor 33, and passes through the protrusion on the outer periphery of the patterning roller 34 which rotates in synchronization with the conveyance speed. 35, a seeding recess 36 of a required depth is continuously formed in the center of the soil bed of each pot portion 9. Thereafter, the seedling raising box 7 is sent to the entrance of the seeding device H by the first belt conveyor 33 and transferred onto the guide rail 68. In the seeding device H, the first sensor 23 detects the introduction of the seedling growing box 7, and the motor M is activated to operate the seedling growing box transport mechanism 15 and the seeding board drive mechanism 16. The seedling raising box 7 is intermittently fed by two pitches by the engaging claw 18 of the seedling raising box conveying mechanism 15. When this seedling raising box 7 reaches a predetermined position in the seeding device H, that is, a seeding position, the second sensor 24 detects this and excites the solenoid 21 of the seeding board drive mechanism 16.

In the seeding plate drive mechanism 16, a slider 19 is reciprocated by the power from the motor M, and a clutch pawl 20 provided on the slider 19 is brought into action by the excitation of a solenoid 21, and the seeding plate 3 It moves to the side and engages with the pin 57 on the seeding plate 3, thereby moving the seeding plate 3 together with the slider 19. The seeding plate 3 reciprocates on the fixed base 5, and moves a large number of seed holes 2 formed in one horizontal row from the inside of the seed storage section 4 to a release position. The seed storage section 4 is located below the hopper 11 and stores a large amount of seeds 1.
When the seed holes 2 enter this interior, the seeds 1 are stored in all the seed holes 2 under substantially the same conditions. At this time, the sowing plate 3 stops momentarily because the moving direction changes. When the seed hole 2 passes below the partition member 12 in order to escape from the seed storage section 4, or because the seeding board 3 has tilted forward and upward by then, the surplus seeds 1 are removed and the seeds are seeded. A required number of seeds 1 remain in the hole 2.

A large number of seed holes 2 are all removed from the seed storage section 4 at the same time to face the seed drop opening 6 of the fixed base 5 that supports the seeding plate 3. The seeds 1 stored in all the seed holes 2 fall from the seed holes 2 through the seed drop openings 6 and enter into a large number of chutes 8. At this time as well, the sowing plate 3 stops momentarily because the direction of movement changes. Each shoot 8 is arranged in one row so that its upper part can face all the seed holes 2, but its lower part is divided into two rows (multiple groups) in the direction of conveyance of the seedling box, in which seeds 1 are placed in one horizontal row. Seedling raising box 7 is divided into two groups, front and rear, and transported intermittently.
Seeds are simultaneously sown into the seeding recesses 36 of the two rows of pot sections 9. When the seeding plate 3 releases the seeds 1, it is moved back by the slider 19 and the tension spring 49, returns to the seed storage section 4, and new seeds 1 are stored therein.

[0030] The seedling raising box 7 after sowing is transferred to the second belt conveyor 3.
7, the irrigation device J supplies the required amount of water and chemicals, and the soil covering device K supplies soil to cover the soil, and the soil surface is leveled. Although the seedling growing boxes 7 are carried continuously into the seeding device H, a gap is provided between the front and rear seedling growing boxes 7.
When the second sensor 24 corresponds to this gap, the solenoid 2
1 is demagnetized, the engagement between the sowing plate 3 and the slider 19 is released, and the sowing plate 3 returns to the home position and waits. Furthermore, if the delivery of seedling boxes 7 is interrupted for some reason, the first sensor 23 is turned off, but the motor M is driven until the third sensor 25 detects the rear end of the last seedling box 7, and the third sensor 25 is turned off, the motor M stops. Then, when a new seedling growing box 7 is brought in next time, there is a gap between the two sensors 23 and 25 between the tip of the new seedling growing box 7 and the rear end of the last seedling growing box 7. A set gap is formed, and the new seedling growing box 7 is prevented from colliding with the last seedling growing box 7. At this time, the solenoid 21 is also demagnetized.

It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways. For example, each sensor 23, 24, 25 of the detection means 22 uses a contact type sensor such as a limit switch, but it is also possible to use an optical sensor or a non-contact type sensor with a magnet provided in the seedling box 7. good.

[0032]

According to the present invention described in detail above, the detection means 22 detects the introduction of the seedling-raising box 7 into the apparatus, and the seedling-raising box conveying mechanism 15 intermittently transports the seedling-raising box 7. Since a third sensor 25 is provided to keep the operation of the seedling box conveying mechanism 15 until the rear end of the seedling box 7 passes after the carry-in detection sensor 23 is turned off, there is a possibility that the seedling box 7 is not carried in for some reason. Even if the seedling growing box 7 is stopped, it is possible to create a gap between the new seedling growing box and the previous seedling growing box 7 when the seedling growing box 7 is restarted.
Accurate seeding into the seeding recess 36 inside can be ensured.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view of a seeding device for raising seedlings of the present invention.

FIG. 2 is a cross-sectional side view of the main parts of the seeding device.

FIG. 3 is a view taken along the X arrow in FIG. 2;

FIG. 4 is a sectional view taken along the line YY in FIG. 2;

FIG. 5 is an overall sectional front view of the seeding device.

FIG. 6 is a cross-sectional explanatory diagram showing a series of seeding operations.

FIG. 7 is a schematic side view of the entire seeding machine.

[Explanation of symbols]

1 Seeds 2 Seed hole 3 Seed board 4 Seed storage part 5 Fixed stand 6 Seed drop opening 7 Seedling box 8 Shoot 9 Pot part 11 Hopper 15 Seedling box transport mechanism 16 Seed plate drive mechanism 22 Detection means 23 First sensor 24 Second sensor 25 Third sensor 36 Seed recess A Seeding machine B Conveyance device C　Bed soil device D Pressure roller E Scraper F　Bed soil brush G Seed recess forming device H Seeding device

Claims (1)

[Claims] 1. A seed storage section 4 formed below a hopper 11; a seeding board 3 disposed at the bottom of the seed storage section 4 and having a large number of seed holes 2 for storing seeds 1 of a desired size; ,
A fixed base 5 supports the seeding plate 3 so as to be able to reciprocate in the direction of transporting the seedling box, and a seed drop opening 6 is disposed below the seed drop opening 6 formed on the outside of the corresponding part of the seed storage part 4 of the fixed base 5. A chute 8 that guides the seedling growing box 7 to the seedling growing box 7, a seedling box conveying means 15 that intermittently transports the seedling growing box 7, and a seedling box conveying means 15 that is synchronized with the transportation of the seedling growing box 7 from the time the seedling growing box 7 is brought in until it is taken out. a seeding plate drive mechanism 16 that drives the seeding plate 3 to reciprocate the seed hole 2 from the inside of the seed storage section 4 to a position corresponding to the seed drop opening 6;
The seedling box transport mechanism 1 detects the loading/unloading of the seedling box 7.
5 and a detection means 22 for operating the seeding plate drive mechanism 16, the detection means 22 includes a first sensor 23 for detecting the introduction of the seedling box 7 and operating the seedling box transport mechanism 15, and a first sensor 23 for operating the seedling box transport mechanism 15. a second sensor 24 that detects the arrival of the seeding plate 7 and drives the seeding plate 3 by the seeding plate drive mechanism 16;
, and a third sensor 25 located between the two sensors 23 and 24 to maintain operation of the seedling box transport mechanism 15 until the rear end of the seedling box 7 passes after the first sensor 23 is turned off. A seeding device for raising seedlings.