JP2000116217A - Seedling transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a sensing failure of a seedling sensor caused by the floating up of mat-shaped seedlings even if the longitudinally sent mat-shaped seedlings are the light and thin one when sensing the presence or absence of the mat seedling on a seedling-carrying platform in a seedling-transplanter longitudinally sending the mat-shaped seedlings on the seedling-carrying platform to a seedling- taking-out side. SOLUTION: A seedling-conveying part A is constituted of a conveying device 16 for longitudinally and compulsorily sending a mat-shaped seedlings, and a pressing tool 30 for pressing the mat-shaped seedlings from the upper side to the conveying device 16 side, on a seedling-carrying platform, and a seedling sensor 56 for sensing the presence or absence of the seedlings on the seedling- conveying part A is also installed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling transplanter for vertically feeding a mat seedling on a seedling mounting table to a side where seedlings are taken out.

[0002]

2. Description of the Related Art In general, in a seedling transplanter such as a riding rice transplanter, a planter that vertically feeds a matted seedling on a seedling mounting table to a seedling take-out side by a vertical feeder and works to plant the delivered seedling is scraped. They are taken and planted in the field. During the transplanting operation, the seedling sensor provided on the seedling mounting table senses whether or not there is a vertically fed seedling, and replenishes the seedlings in a timely manner.

[0003] Such a seedling transplanting machine can perform the seedling transplanting operation almost automatically as the machine becomes more sophisticated.
In recent years, in order to further improve efficiency, a light and long strip-shaped mat seedling is rolled up to form a roll seedling, and the roll seedling is placed on a transplanter, thereby reducing the weight of the seedling (comparing the total amount). It is known that labor saving of seedling transporting work and reduction of seedling replenishing work by reducing the number of times of seedling supply due to the length of seedlings are achieved.

[0004] By the way, the above-mentioned roll seedlings are laid with a reinforcing mat material such as a nonwoven fabric in a long (for example, 30 cm wide and 6 m long) seedling raising case, and a predetermined amount of seed rice is sown thereon. After that, the seedlings are raised in a hydroponic culture for a predetermined period and are in a rooted state. When sensing the presence or absence of a seedling to be fed vertically, the mat seedling floats due to the sensing element of the seedling sensor that moves upward, so that there is a problem that even though the seedling is present, it is sensed that there is no seedling.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is transported vertically when a seedling sensor detects the presence of a mat seedling on a seedling mounting table. It is an object of the present invention to provide a seedling transplanter capable of preventing erroneous confirmation of a seedling sensor and performing a smooth transplanting operation even when a seedling is a light and thin mat seedling.

[0006]

In order to solve the above-mentioned problems, a technical measure taken by the present invention is to provide a seedling transplanter for vertically feeding a mat seedling on a seedling mounting table to a side where seedlings are taken out. A seedling sensor for sensing the presence of seedlings in the seedling transfer section while forming a seedling transfer section on the table with a transfer device for forcibly feeding the mat seedlings vertically and a holding tool for pressing the mat seedlings from above to the transfer device side. It is characterized by having provided, and in the above-mentioned seedling mounting table,
A transport device for forcibly feeding the mat seedlings and a presser for pressing the mat seedlings from above toward the transport device form a seedling transport section, and a seedling sensor is provided on the lower transport side of the seedling transport section. The method further comprises forming a seedling transfer section on the seedling mounting table by a transfer device for forcibly feeding the mat seedling vertically and a pressing tool arranged vertically to press the mat seedling toward the transfer device from above. The present invention is characterized in that a seedling sensor is provided between the seedling holding positions of the holding tool.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Next, an embodiment of the present invention will be described in detail based on an example of a seedling transplanter using a roll seedling shown in the drawings. First, in FIGS. 1 to 3, reference numeral 1 denotes a traveling machine of a riding rice transplanter exemplified as a seedling transplanter, and a planting section 3 is attached to a rear portion of the traveling machine 1 via a link mechanism 2 so as to be movable up and down. Have been. The planting section 3 includes a holder frame 4 detachably connected to the link mechanism 2, a planting section frame 5 rotatably connected to the holder frame 4, and a drive assembled to the planting section frame 5. A case 6, a plurality of planting cases 7 projecting rearward from the drive case 6, an apron 8 provided above the planting case 7 on the side of taking out seedlings, and a reciprocating left and right along the apron 8. A seedling mounting table 9, a planting claw 10 for scratching the seedlings from the seedling mounting table 9 and planting it in a field, a float 11 for leveling a rice field at a position in front of the planting claw 10, and the like. Each of these basic configurations is the same as the conventional one.

The seedling mounting table 9 is arranged in a front-back, high-low inclination position, and on its upper surface, a seedling mounting surface 13 is divided by vertical guide ribs 12 for the number of planting streaks. The roll seedlings 14 are set on each seedling mounting surface 13, and the mat seedlings fed from the roll seedlings 14 are supplied to the lower apron 8 while restricting lateral displacement by the right and left guide ribs 12. It is supposed to.

Reference numeral 15 denotes a rotary case attached to the rear end of the planting case 7, and the rotary case 15
At both ends thereof, the planting claws 10 are provided, and a gear mechanism for rotating the pair of planting claws 10 along a predetermined trajectory with its own rotation is provided. And planting nail 10
Is a predetermined length L1 in the scraping opening 8a formed in the apron 8.
So that a planting operation is performed between a scraping process of scraping one plant from the lower end of the roll seedling 14 and a planting process of rushing into the rice field and releasing the seedling. Has become.

Reference numeral 16 denotes a transport device provided on each seedling mounting surface 13. The transport device 16 includes a lower (transfer lower) drive roller 17 provided on the lower surface side of the seedling mounting surface 13 and an upper (lower) transport roller 17. The left and right vertical feed belts 19 composed of wide belts with projections are suspended between the driven rollers 18 (on the side of the upper side of the conveyance), and the drive roller shaft 17a is connected to the vertical feed lever via a ratchet mechanism (not shown). are doing. Then, when the seedling mounting table 9 reaches the horizontal feed end, the vertical feed drive cam provided in the drive case 6 is configured to flip up the vertical feed lever, and when the vertical feed lever is knocked up, As the drive roller 17 rotates by a predetermined amount in conjunction therewith, the tension side (seedling contact side) of the vertical feed belt 19 moves downward by a predetermined feed amount L2, forcing the roll seedling 14 toward the apron 8. Feed vertically. Further, in this embodiment, the transporting devices 16 of each strip are configured in two stages, upper and lower, in the transporting direction, and the upper and lower transporting devices 16 are interlocked and connected via a chain transmission mechanism 20. Note that the feed amount L2 is
Of the roll seedling 14 against the apron 8 is prevented by setting it smaller than the amount of entry L1 into the apron 8.

Numeral 21 denotes a roll seedling holding portion disposed opposite to the seedling mounting surface 13 of each strip.
Are holding rackets 22 erected on the guide ribs 12,
A left-right arm support shaft 23 provided between the holding portion rackets 22, an arm boss 24 rotatably fitted to the arm support shaft 23, and a vertical swing welded to the arm boss 24 at a predetermined interval. A pair of left and right support arms 25, a support arm holding mechanism 26 for holding the support arm 25 at a predetermined position, a roll seedling holding shaft 27 detachably and rotatably supported between the left and right support arms 25, and the like. It is composed of That is, when replenishing the roll seedling holding unit 21 with the roll seedling 14, the roll core 28 of the roll seedling 14 is inserted through the roll seedling holding shaft 27, and then both ends of the roll seedling holding shaft 27 are Hook groove 2 formed at the tip of
5a is set so as to be hooked. Then, the roll seedling 1 set between the left and right support arms 25
4 is located between the left and right guide ribs 12 in plan view,
The mat seedling continuously fed from the roll seedling 14 is guided by the left and right guide ribs 12.

The support arm holding mechanism 26 includes an arm holding lever 29 which is attached to the holding portion racket 22 so as to be able to swing back and forth, and the arm holding lever 29 for supporting the arm 25.
And a bullet 29c that urges toward the base end portion. Then, a stopper piece 25 is attached to the base end of the support arm 25.
b, while the holding groove 29 is
Then, the support arm 25 is held at a predetermined position by locking the stopper piece 25b with the locking groove 29a.
Further, the arm holding lever 29 has a plurality of locking grooves 29a formed in the vertical direction, and is provided with a position suitable for feeding the roll seedling 14 and a storage position near the seedling mounting surface 13 and an upward position from the feeding position. The support arm 25 is moved to the retracted position.
Can be selectively retained.

The roll seedling holding shaft 27 has a shaft member 27 which is formed to be slightly longer than the horizontal distance between the support arms 25.
A pair of right and left wheel plates 27b slightly smaller in diameter than the inner diameter of the roll core 28 is welded to a, and the left and right wheel plates 27b are connected by a reinforcing stay. When the roll seedling 14 is set on the roll seedling holding shaft 27, the roll core 28 of the roll seedling 14 is inserted from one end of the roll seedling holding shaft 27.
8, a step 28a is formed at one end of the inner peripheral surface,
The roll seedling 14 is locked at an appropriate setting position based on the contact between the step portion 28a and the wheel plate 27b.

Numeral 30 is a pressing member arranged vertically to press the mat seedlings fed from the roll seedlings 14 from above toward the conveying device 16, and the pressing member 30 is configured as follows. That is, 31 is the upper vertical feed belt 1
9. An upper rotating seedling presser body disposed at an opposing position of No. 9,
The upper rotating seedling holding body 31 is provided between the pair of left and right seedling holding arms 32 provided on the holding portion racket 22 so as to be vertically swingable (movable in the direction of contact with and separating from the seedling mounting surface). Seedling holding spindle 33, left and right seedling holding discs 34 rotatably fitted to the seedling holding spindle 33, and the seedling holding disc 34
Is configured by a collar 35 for positioning. The seedling presser disc 34 is rotated while pressing the roll seedling 14 fed out along the upper vertical feed belt 19 against the upper vertical feed belt 19 by its own weight or the urging force of a not-shown elastic machine. It is possible to prevent the upper vertical feed belt 19 from slipping due to the floating of the roll seedlings 14 and to regulate the lateral displacement of the roll seedlings 14, and to feed out a predetermined amount of the roll seedlings 14 while regulating the lateral displacement. Is available.

Reference numeral 36 denotes a first rotating seedling presser disposed at a position facing the upper portion of the lower longitudinal feed belt 19, and the first rotating seedling presser 36 is provided at both left and right ends of the seedling mounting table 9. A pair of left and right first seedling holding arms 38, which are provided on the upper end of the seedling holding bracket 37 so as to be able to swing up and down, are erected between the first seedling holding arms 38. First seedling holding frame 39, first seedling holding stay 40 projecting from first seedling holding frame 39 toward lower longitudinal feed belt 19 of each strip, and welded to the tip of first seedling holding stay 40. Boss 41, a first seedling holding shaft 42 rotatably inserted through the boss 41, a plurality of left and right first seedling holding disks 43 rotatably fitted on the first seedling holding shaft 42, the first seedling. It is composed of a collar 44 for positioning the presser disk 43 and the like. Then, the first seedling holding disk 43 is driven while the roll seedling 14 fed out along the lower vertical feed belt 19 is pressed against the lower vertical feed belt 19 by its own weight or the urging force of a not-shown elastic machine. A plurality of first rotating seed presser bodies 36 that rotate, but face the lower vertical feed belt 19 of each strip.
Are integrally provided on the single first seedling presser frame 39, so that the first rotating seedling presser body 36 of each strip is operated in accordance with the operation of the retreat operation lever 45 provided on the first seedling presser frame 39.
Can be simultaneously retracted to the restricted position moved upward.

Reference numeral 46 denotes a second rotating seedling presser disposed at a position facing the lower part of the lower vertical feed belt 19,
The second rotating seedling holding body 46 is provided with the seedling holding bracket 37.
A pair of left and right second seedling holding arms 48 provided on the upper end of the second seedling swinging arm, a second seedling holding frame 49 erected between the second seedling holding arms 48, and the second seedling holding frame 49.
, A boss 51 welded to the distal end of the second seedling press stay 50, which is projected toward the lower vertical feed belt 19 of each strip, and is rotatably inserted through the boss 51. A second seedling holding spindle 52, a plurality of left and right second seedling holding discs 53 rotatably fitted to the second seedling holding spindle 52, a collar 54 for positioning the second seedling holding disc 53, and the like. ing. The left and right second seedling holding discs 53 follow the roll seedlings 14 fed out along the lower vertical feed belt 19 while pressing the roll seedlings 14 against the lower vertical feed belt 19 with its own weight or the urging force of a not-shown elastic machine. To rotate. In this manner, the roll seedling 14 is formed by the two rows of upper and lower rotating seed pressers 36 and 46.
Of the rotating seedlings 36, 46
The seedling holding discs 43 and 53 move independently in the direction of contact and separation of the roll seedlings 14, so that even if the thickness of the roll seedlings 14 varies, the seedling holding discs 43 and 53 can be independently and appropriately adjusted. As a result, the roll seedlings 14 are pressed, and as a result, inconveniences such as the lower vertical feed belt 19 slipping and variations in the vertical feed amount of the roll seedlings 14 can be prevented as much as possible.

Since the second seedling holding arm 48 has passed above the first seedling holding frame 39 and has reached below the first seedling holding disk 43, the first rotating seedling holding body 36 is retracted. The first seedling holding frame 39 pushes up the second seedling holding arm 48, and the second rotating seedling holding body 46 is also evacuated in an interlocking manner. 55 is an evacuation lock lever.

A seedling transport section A is formed by the back-and-forth holding device 30 and the transport device 16 configured as described above, and the seedling transport section A detects the presence or absence of a vertically fed seedling. Seedling sensor 56 is provided. As shown in FIG. 5, the seedling sensor 56 has a sensor 56b urged upward on the upper surface of a sensor body 56a.
When the seedling 6b is pressed by the vertically fed seedling, the contact 56c closes to sense the presence of the seedling, and when there is no seedling, the sensing element 56b moves upward, and the contact 56c opens and the seedling is not present. Is to be sensed.

FIG. 4 shows that the seedling sensor 56 is provided on the lower side of the seedling transfer section A in the conveying direction. The first rotating seedling pressing body 36 and the second rotating seedling pressing body 4 in the vertical direction which constitute the holding tool 30 are shown.
6 to sense the seedling being conveyed while being pressed. The seedling sensor 56 detects the seedling holding disks 43 of the first rotating seedling holding body 36 and the second rotating seedling holding body 46,
It is arranged between the seedling holding positions by the reference numeral 53. In addition, 5
Numeral 7 is a seedling holding rod disposed between the second rotating seedling holding body 46 and the apron 8.

Since the present invention is configured as described above, when the seedling transplanting operation is performed, if the roll seedling 14 is set between the left and right support arms 25 of the roll seedling holding portion 21, the seedling is unwound from the roll seedling 14. The mat seedling is transported vertically to the seedling removal side by the seedling transport section A, scraped off from the apron 8 by a planting claw 10 that operates for planting, and transplanted to a field. The seedling sensor 56 provided in the seedling transport section A senses whether or not there is a vertically fed seedling. However, in the seedling transport section A, the transport device 16 forcibly feeds the mat seedlings while pressing it with the presser 30. Even if a roll seedling is wound up with a light and long strip-shaped seedling, it can be satisfactorily conveyed without being lifted by the sensing element 56b of the seedling sensor 56. For this reason, the seedling sensor 56 does not sense that there is no seedling even though there is a seedling.

In the embodiment shown in FIG.
Since the seedling 6 is located on the lower side of the seedling transfer section A, it senses the seedling being conveyed while being pressed by the presser 30. Therefore, it is possible to prevent erroneous confirmation of the presence or absence of the seedling on the side where the seedling is taken out, and furthermore, the seedling arranged vertically. Since the seedling sensor 56 senses the seedling that is well pressed by the holding discs 43 and 53 between the seedling holding positions, the presence or absence of the seedling can be more accurately sensed.

In the above embodiment, a seedling transplanter using roll seedlings has been described. However, it is needless to say that a seedling transplanter using conventional mat seedlings can be similarly applied.

[0023]

In summary, the present invention relates to a seedling transplanter for vertically feeding mat seedlings on a seedling table to a seedling removal side, comprising: a conveying device for forcibly feeding mat seedlings to the seedling table; A seedling transport section is formed with a presser that presses the seedlings toward the transport apparatus from above, and a seedling sensor is provided in the seedling transport section to detect the presence or absence of seedlings. While forming a seedling conveying part with a conveying device that feeds vertically and a holding tool that presses the mat seedling from above to the conveying device side,
A seedling sensor is provided on the lower side of the seedling transfer unit, and a transfer device for forcibly feeding the mat seedlings vertically on the seedling mounting table, and the mat seedlings are arranged in a vertical direction to press the seedlings toward the transfer device from above. Since the seedling transfer section is formed with the presser and the seedling sensor is provided between the seedling holding positions of the presser, the seedling sensor provided in the seedling transfer section is configured such that the matte seedling is formed by the transfer device and the presser. Since the seedlings are sensed at the place where the seedlings are well transported, it is possible to prevent erroneous confirmation of the presence or absence of the seedlings and to prevent the occurrence of continuous lack of seeds at the time of transplanting the seedlings.

Also, in the case where a seedling sensor is provided on the lower side of the seedling transfer section, the seedling being conveyed while being pressed by the presser is sensed. It can be carried out. Furthermore, when the seedling sensor is provided between the seedling holding positions of the holding tool, the mat seedling that is satisfactorily pressed by the holding tool arranged in the vertical direction is detected, so that the presence or absence of the seedling can be more accurately sensed. Can be.

[Brief description of the drawings]

FIG. 1 is an overall side view of a transplanter.

FIG. 2 is a side view of a main part of the planting section.

FIG. 3 is a plan view of the same.

FIG. 4 is a side view of a main part of a planting section showing another embodiment.

FIG. 5 is an enlarged side view of the seedling sensor.

[Explanation of symbols]

 9 Seedling table 16 Conveyor 30 Holder 56 Seedling sensor A Seedling transfer unit

Claims (3)

[Claims] 1. A seedling transplanter for vertically feeding mat seedlings on a seedling mounting table to a seedling removal side, a conveying device for forcibly feeding the mat seedlings to the seedling mounting table, and a matting seedling from above the conveying device side. A seedling transfer machine, comprising: a seedling transfer section formed by a presser that presses a seedling; and a seedling sensor for detecting the presence or absence of a seedling in the seedling transfer section. 2. A seedling transplanter for vertically feeding mat seedlings on a seedling mounting table to a side where seedlings are taken out, comprising: a conveying device for forcibly feeding matte seedlings to the seedling mounting table; A seedling transfer unit formed by a presser that presses the seedling transfer unit, and a seedling sensor provided on the lower side of the seedling transfer unit in the transfer direction. 3. A seedling transplanter for vertically feeding mat seedlings on a seedling mounting table to a seedling removal side, a conveying device for forcibly feeding the mat seedlings to the seedling mounting table, and a matting seedling from above the conveying device side. A seedling transfer machine comprising: a seedling transporting portion formed by vertically arranged pressing tools for pressing a seedling; and a seedling sensor provided between seedling holding positions by the pressing tool.