JPH1156044A - Transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a transplanter capable of preventing it from causing unevenness in a scraping quantity and deletion of seedlings, through smoothly supplying seedlings from a seedling roll (i.e., a roll sheet made of standing seedlings and soil), by setting a seedling roll-retaining mechanism so as to be located in a position where the seedling roll in an initial supplying state is not superimposed on a guide rib, when shown in side view, or the superimposed amplitude is equal to or less than the thickness of one layer of the seedling roll. SOLUTION: The transplanter is equipped with (A) a seedling roll-retaining mechanism 21 in which a seedling roll 14 formed by winding a belt-like sheet made of standing seedlings and soil is retained in an unwindable state, (B) a seedling-loading bench 9 which guides downwardly the sheet of the seedling roll 14 continuously unwound from the outermost layer along a seedling-loading plane partitioned with the right and left guide ribs 12, 12 and (C) a transplanting mechanism. When the seedling roll 14 is retained in a position facing the seedling-loading plane, the seedling roll-loading mechanism 21 is set in a position where the seedling roll 14 in an initial supplying state is not superimposed on a guide rib when shown in side view or the superimposed amplitude is equal to or less than the thickness of one layer of the seedling roll.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention belongs to the technical field of transplanters such as riding rice transplanters.

[0002]

2. Description of the Related Art In recent years, transplanting of seedlings for rice transplanting and the like can be performed almost automatically with the advancement of the transplanting machine. Due to the difficulty of mechanization, it was still hard labor that relied on human power.
Therefore, light and long belt-shaped seedlings (long mat hydroponic seedlings)
Has been proposed to form a roll seedling by winding the seedling onto a transplanter. In other words, the weight of the seedlings (compared to the total amount) is not allowed to reduce the labor required to transport the seedlings. It is possible to measure up.

[0003]

By the way, in transplanting the roll seedlings, a roll seedling holding device for holding the roll seedlings freely, and a roll seedling continuously fed from the outer peripheral side are guided by left and right guide ribs. A transplanting plant including a seedling platform that guides downward along a partitioned seedling mounting surface, and a transplanting device that scrapes an appropriate number of seedlings from a roll seedling that is guided to the lower end of the seedling mounting surface and transplants the seedlings to a field. Machines have already been proposed, but in such a case, if the sliding contact resistance between the guide ribs and the roll seedlings changes, the roll seedlings will be dispensed irregularly, resulting in variations in the scraping amount and lack of stock. Could occur.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve these problems in view of the above-mentioned circumstances, and a roll seedling on which a band-shaped seedling is wound is held so as to be able to be fed out. Rolling seedling holding device, a seedling mounting table that guides rolled seedlings continuously fed from the outer peripheral side downward along a seedling mounting surface partitioned by left and right guide ribs, and guides to a lower end of the seedling mounting surface And a transplanter for transplanting a suitable number of seedlings from the rolled seedlings and transplanting the rolled seedlings to a field. Is set at a position where the roll seedling does not overlap with the guide rib in a side view, or at a position where the overlap width is equal to or less than the thickness dimension of one roll of the roll seedling. That is, even in the initial feeding state, the rolled seedling in the wound state does not come into sliding contact with the guide rib over two or more turns, so that a large sliding contact resistance occurs between the guide rib and the roll seedling, The resistance does not fluctuate greatly,
As a result, it is possible to smoothly feed out the roll seedlings and to prevent the inconvenient occurrence of variations in the scraping amount and lack of stock. Further, the roll seedling is held in a free rotation state or a state in which some rotation resistance is given. In other words, when the roll seedling is held in a free rotation state, there is an advantage that the roll seedling can be smoothly fed out, and when the roll seedling is held in a state where some rotation resistance is given, the roll seedling is moved by inertia. The disadvantage of leading rotation can be avoided.

[0005]

Next, one embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine of a riding rice transplanter, and a planting section 3 is connected to a rear portion of the traveling machine 1 via an elevating link mechanism 2. The planting section 3 includes a holder frame 4 detachably connected to the lifting link mechanism 2, a planting section frame 5 rotatably connected to the holder frame 4, and an integral part of the planting section frame 5. Drive case 6, assembled to
A plurality of planting cases 7 projecting rearward from the drive case 6, an apron 8 disposed above and above the planting case 7 in a left-right direction, and a seedling mounting table 9 movable left and right along the apron 8. And a planting claw 10 for scraping the seedlings from the lower end of the seedling mounting table 9 and planting them on the rice field, a float 11 for leveling the rice field at a position in front of the planting nails 10, and the like. All configurations are the same as before.

The seedling mounting table 9 is disposed above the drive case 6 in a front-to-back and rear-to-bottom inclined posture, and has on its upper surface (rear surface) a plurality of vertically oriented guide ribs (convex portions). Seedling mounting surfaces 13 are formed for the number of planting lines (for example, five lines) divided by 12. That is, the roll seedlings 14, which will be described later, set on the respective seedling mounting surfaces 13,
The supply guide is directed toward the lower planting claw 10 while restricting the lateral displacement in 2, but the entire seedling mounting table 9 is moved right and left by the power of the seedling mounting table horizontal feed mechanism (not shown) incorporated in the drive case 6. It reciprocates in the direction.

A rotary case 15 is attached to the rear end of the planting case 7.
Includes a pair of planting claws 10 at both ends and a planetary gear mechanism (not shown) for rotating the pair of planting claws 10 along a predetermined trajectory with its own rotation. . That is, the planting claw 10 enters the scraping opening 8a formed in the apron 8 by a predetermined dimension L1 to scrape one seedling of seedling from the lower end of the roll seedling 14, and enters the paddy surface. It is designed to rotate cyclically between the planting process for releasing the scraped seedlings.

Reference numeral 16 denotes a vertical feeding mechanism provided on each seedling mounting surface 13 of the seedling mounting table 9. In the vertical feeding mechanism 16, a lower driving roller 17 and an upper driven roller 18 are interposed. A vertical feed belt 19 formed of a wide belt with projections is suspended, and the drive roller shaft 17a is interlocked to a vertical feed lever (not shown) via a ratchet mechanism (not shown). That is, when the seedling mounting table 9 reaches the horizontal feed end, a vertical feed drive cam (not shown) provided in the drive case 6 is configured to knock up the vertical feed lever, and the vertical feed lever is knocked up. In this case, the tension side (the seedling contact side) of the vertical feed belt 19 moves downward by a predetermined feed amount L2 as the drive roller 17 interlockingly connected via the ratchet mechanism rotates a predetermined amount. The roller seedlings 14 are vertically fed toward the apron 8. In the present embodiment, the vertical feeding mechanisms 16 of the respective strips are configured in upper and lower two stages, and the upper and lower vertical feeding mechanisms 16 are interlocked via the chain transmission mechanism 20. Connected.

Reference numeral 21 denotes a roll seedling holding unit provided to face the seedling mounting surface 13 of each strip.
Is a holder bracket 2 erected on the guide rib 12.
2. An arm support shaft 23 erected in the left-right direction between the holding brackets 22, an arm boss 24 rotatably fitted to the arm support shaft 23, and welded to the arm boss 24 at a predetermined interval. A pair of left and right support arms 25 capable of swinging up and down (moving in the direction of contact and separation of the seedling mounting surface)
, A support arm holding mechanism 26 for holding the roller at a predetermined position, a roll seedling holding shaft 27 which is detachably supported between the left and right support arms 25 and is freely rotatably supported. That is, when replenishing the roll seedling holding unit 21 with the roll seedling 14, 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
Is set so as to be hooked on a hook groove 25a formed at the tip of the head. Since the roll seedlings 14 set between the left and right support arms 25 are located between the left and right guide ribs 12 in plan view, the roll seedlings 14 continuously fed out from the outer peripheral side can be easily and without difficulty. It is being led between.

By the way, the roll seedling 14 is provided 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 after seeding a predetermined amount of seeds there. A seedling raising operation in which the seedlings are cultivated in hydroponic cultivation for a predetermined period to form a band-shaped seedling in a rooted state (long mat hydroponic seedling), and winding the band-shaped seedling around a roll core 28 so that the seedling falls down in the winding direction. It is obtained through the taking operation. The width and length of the band-shaped seedlings are uniform, but the thickness is slightly varied according to the seedling raising environment. At the time of winding, the lateral displacement and extension of the band-shaped seedlings occur, so that the actual width of the rolled seedlings 14 slightly varies.

The support arm holding mechanism 26 includes an arm holding lever 29 that is attached to the holding bracket 22 so as to be swingable back and forth.
5 and an ammunition 30 for urging toward the base end. That is, the stopper piece 25 is attached to the base end of the support arm 25.
b, while the holding groove 29 is
The supporting arm 25 is held at a predetermined position by locking the stopper piece 25b with the locking groove 29a. The arm holding lever 29 has a plurality of locking grooves 29a arranged vertically. Therefore, the support arm 25 can be selectively held at a feeding position suitable for feeding the roll seedling 14, a storage position close to the seedling mounting surface 13, and a retreat position retracting upward from the feeding position. It has become. The switching of the holding position is performed by swinging the arm holding lever 29 in the non-locking direction while supporting the support arm 25 by hand, and after swinging the support arm 25 to the desired switching position in this state. When the arm holding lever 29 is released, the support arm 25 is held at the switching position.

When planting the roll seedling 14, the support arm 25 is held at the extended position, and the roll seedling 14 (roll seedling holding shaft 2) is held between the left and right support arms 25.
7), the setting position (roll seedling holding position) is a position where the roll seedling 14 in the initial feeding state does not overlap with the guide rib 12 in a side view, or the overlapping width is a thickness of one roll seedling. It is set at a position that is less than the height dimension. That is, even in the initial feeding state, the rolled seedling 14 in the wound state is prevented from sliding on the guide rib 12 over two or more turns. As a result, no resistance is generated and the sliding contact resistance is not largely changed.
4 can be smoothly delivered. Note that the above-mentioned initial feeding state is a state in which the roll seedlings 14 are not fed at all (winding diameter = maximum) and a roll seedling 1
4 suggests both the state in which it was manually extended to a position where it can be planted (winding diameter <maximum).

Further, the roll seedling holding shaft 27 is formed with a shaft member 2 which is formed to be slightly longer than the horizontal interval of the support arm 25.
A pair of right and left wheel plates 27b slightly smaller in diameter than the inner diameter of the roll core 28 are welded to 7a, and the left and right wheel plates 27b are connected by a reinforcing stay (not shown). When the roll seedling 14 is set on the roll seedling holding shaft 27, the roll seedling holding shaft 27
The roll core 28 of the roll seedling 14 is inserted from one end side of the roll seedling 14 (or the roll seedling holding shaft 27 is inserted from one end side of the roll core 28), but a step 28 a is formed in advance at one end of the inner peripheral surface of the roll core 28. Therefore, the roll seedling 14 is locked at a substantially appropriate set position based on the contact between the step portion 28a and the one end side wheel plate 27b. Therefore, it is not possible to simplify the setting operation of the roll seedling 14 to an appropriate position, and to prevent the roll seedling 14 inserted from one end of the roll seedling holding shaft 27 from dropping from the other end. In addition, the roll seedling 14 can be carried by holding one end of the roll seedling holding shaft 27.

In the present embodiment, when the roll seedling 14 is locked at the proper setting position, the roll seedling 14 is allowed to move to one end side. When the roll seedling 14 is displaced in the left-right direction, the roll seedling 14 is allowed to move to prevent twisting of the feeding seedling. The inconvenience can be eliminated.

Reference numeral 31 denotes an upper rotating seedling presser disposed at a position opposite to the upper vertical feed belt 19, and the upper rotating seedling presser 31 is vertically swayable on the holding portion bracket 22 (seedling placement). A pair of right and left seedling presser arms 32 provided in a movable manner in the surface contact / separation direction), a plurality of seedling presser support shafts 33 provided between the left and right seedling presser arms 32, and a plurality of outer fittings rotatably fitted to the seedling presser support shafts 33. It is composed of a seedling holding disk 34, a collar 35 for positioning the seedling holding disk 34, and the like. And
The seedling holding disk 34 is driven by the roll seedling 14 fed out along the upper vertical feed belt 19 while pressing the roll seedling 14 against the upper vertical feed belt 19 by its own weight (including an arm load or the like) or the urging force of a not-shown elastic machine. , The slippage of the upper vertical feed belt 19 caused by the rising of the roll seedlings 14 can be prevented, and the lateral displacement of the roll seedlings 14 can be regulated. As a result, the predetermined amount (longitudinal feed amount) of the rolls can be reduced. Seedling 14
Can be pulled out (extended) while restricting the lateral displacement.

Reference numeral 36 denotes a lower first rotating seedling presser member disposed at a position facing the upper portion of the lower vertical feed belt 19. A pair of right and left first seedling holding arms 3, which are provided on the upper end of the seedling holding bracket 37 so as to be swingable up and down (movable in the direction of contact with and away from the seedling mounting surface).
8, a first seedling holding frame 39 erected between the left and right first seedling holding arms 38, and a plurality of first seedling holding frames 39 projecting from the first seedling holding frame 39 toward the lower longitudinal feed belt 19 of each strip. One seedling holding stay 40, a boss 41 welded to the tip of the first seedling holding stay 40, a first seedling holding spindle 42 rotatably inserted through the boss 41, and a first seedling holding spindle 42. It comprises a plurality of first seedling holding disks 43 rotatably fitted to the outside, a collar 44 for positioning the first seedling holding disks 43, and the like. The first seedling presser disc 43 holds the roll seedling 14 fed out along the lower vertical feed belt 19 by its own weight (including an arm load or the like) or by the urging force of a not-shown elastic machine. Although the roll seedling 14 is rotated while being pressed against the upper portion, the rising and lateral displacement of the roll seedling 14 are regulated. However, a plurality of lower first rotations facing the lower longitudinal feed belt 19 of each strip. Since the seedling presser body 36 is provided integrally with the single first seedling presser frame 39, the lower first rotation of each strip is performed with the operation of the retreat operation lever 45 provided on the first seedling presser frame 39. The seedling holding body 36 can be simultaneously retracted to the non-floating restriction position.

Reference numeral 46 denotes a lower second rotating seedling presser disposed at a position facing the lower portion of the lower vertical feed belt 19, and the lower second rotating seedling holder 46 is provided with the seedling pressing bracket 3.
Swing up and down at the upper end of 7 (Move in the direction of contact and separation of seedling mounting surface)
A pair of left and right second seedling holding arms 48, a second seedling holding frame 49 provided between the left and right second seedling holding arms 48, and a lower longitudinal feed belt from the second seedling holding frame 49 to each strip. A plurality of second seedling presser stays 50 protruding toward 19; a boss 51 welded to the tip of the second seedling presser stay 50; a second seedling presser support shaft rotatably inserted through the boss 51; 52, a plurality of second seedling presser discs 53 rotatably fitted to the second seedling presser support shaft 52, the second seeder presser discs 53
Are arranged by a collar 54 for positioning. The second seedling holding disk 53 is connected to the lower vertical feed belt 19.
The roll seedling 14 fed out along the path is rotated by itself while being pressed against the lower part of the lower vertical feed belt 19 by its own weight (including an arm load or the like) or the urging force of an unillustrated elastic machine. That is, at the position facing the lower vertical feed belt 19,
Roll seedlings 1 provided with two rows of upper and lower rotating seedling holders 36 and 46
4 is regulated, but the seedling holding discs 43, 53 of the respective rotating seedling holding bodies 36, 46 can move independently in the roll seedling contact / separation direction. Even if the thickness dimensions vary, each seedling holding disk 43, 5
3 moves independently and presses the roll seedling 14 appropriately, and as a result, the lower longitudinal feed belt 19 slips and the inconsistency in the vertical feed amount of the roll seedling 14 occurs as much as possible. Can be prevented.
In addition, a plurality of lower second rotating seedling presser bodies 46 facing the lower vertical feed belt 19 of each strip are connected to a single second seedling pressing frame 4.
9, the lower second rotating seed presser body 46 can be simultaneously retracted with the retreating operation of the second seedling pressing frame 49 in the same manner as the lower first rotating seed presser body 36. It is.

Incidentally, the second seedling holding arm 48 is
It has reached below the first seedling presser disc 43 through the vicinity near the upper part (near the rear) of the first seedling presser frame 39. Therefore, when the lower first rotating seedling presser body 36 has been retreated, the first The seedling presser frame 39 pushes up the second seedling presser arm 48 so that the lower second rotating seedling presser body 46 is also evacuated in an interlocking manner. That is, while the upper and lower two rows of lower rotating seedling press bodies 36 and 46 are configured to be independently movable, during the retreat operation, the upper and lower two rows of lower rotating seedling press bodies 36 and 46 are integrally retracted. Therefore, it is possible to easily perform a seedling replenishing operation or the like as compared with a case where the rotating seedling holders 36 and 46 are separately retracted.

Reference numeral 55 denotes the lower first rotating seedling presser body 3
6. The retracting and holding mechanism 55 is a retracting lock lever 56 that is swingably provided at the base end of the seedling holding bracket 37, and the retracting lock lever 56 is a lever base end. And a stopper plate 38a formed integrally with the base end of the first seed presser arm 38, and the like. That is, when the lower first rotating seedling presser body 36 is retracted to the non-floating restriction position, the distal end of the stopper plate 38a enters the lock groove 56a while pushing the retreat lock lever 56 to the non-locking posture side. Since it is locked, the lower first rotating seedling presser body 36 (including the lower second rotating seedling presser body 46 that interlocks and retreats) is automatically held at a predetermined retracted position. When the retraction lock lever 56 is pivoted to the unlock position, the locking of the stopper plate 38a by the lock groove 56a is released, and the lower first rotating seedling presser body 36 returns to the floating restriction position. ing. Therefore, the lower rotating seedling presser body 36,
When the 46 is retracted to the non-floating restriction position, it is not necessary to hold the retracted lower rotating seed presser bodies 36 and 46 by hand. As a result, workability when replenishing seedlings and cleaning the seedling mounting table is improved. It can be made to be.

By the way, each rotating seedling holding body 31, 36, 4
The seedling holding disks 34, 43 and 53 of No. 6 are common parts in which a disk member 59 having irregularities on the outer periphery is welded to one end of a boss member 58, and therefore can contribute to reduction of manufacturing cost and improvement of assemblability. However, in the present embodiment, the right and left assembling directions of the seedling holding discs 43 and 53 are reversed between the lower first rotating seedling pressing body 36 and the lower second rotating seedling pressing body 46, so that the seedling holding Although the disks 43 and 53 are common, the seedling positions of the seedling holding disks 43 and 53 are shifted in the left-right direction so that the damage to the roll seedlings 14 accompanying the seedling holding can be dispersed. .

Further, reference numeral 60 denotes a rod-shaped seedling presser disposed between the lower second rotating seedling presser 46 and the apron 8 (seedling picking position). A plurality of rod-shaped members 60a facing the seedling feeding direction are arranged side by side at predetermined intervals in the left-right direction.
Since a is integrally welded to the second seedling holding frame 49, the roll seedling 14 is moved integrally with the lower second rotating seedling holding body 46 in the roll seedling contact / separation direction, and the roll seedling 14 is placed on the seedling mounting surface 13. It is designed to press moderately. That is, between the lower second rotating seedling presser body 46 and the apron 8,
The lifting of the roll seedling 14 due to the curl, the lateral displacement of the roll seedling 14 due to the sliding contact with the apron 8, the pulling out of the roll seedling 14 due to the scraping resistance, and the like can be regulated. Is retracted to the non-floating restriction position in conjunction with the lower second rotating seedling presser body 46, so that the rod-shaped seedling presser body 60 and the lower second rotating seedling presser body 46 are separately retracted. Thus, workability at the time of seedling replenishment and the like can be improved.

The roll seedling 14 whose rising is restricted by the rod-shaped seedling holding body 60 is laterally fed every time one plant is scraped by the planting claw 10 entering from the scraping opening 8a of the apron 8. When the platform 9 reaches the horizontal feed end, the vertical feed belt 1
9, the lower end of the roll seedling 14
Even if it receives the longitudinal feed action, it is not pressed against the apron 8. That is, pressing the roll seedling 14 against the apron 8 is prevented by setting the vertical feed amount L2 of the vertical feed belt 19 to be smaller than the apron entering amount (scraping amount) L1 of the planting claw 10, As a result, lifting, buckling, damage, lateral displacement, and the like of the roll seedling 14 caused by pressing against the apron 8 can be avoided.

In the plant constructed as described above, when planting the roll seedling 14, the roll seedling holding unit 21
The roll seedlings 14 are set between the left and right support arms 25, and the set position is such that the roll seedlings 14 in the initial feeding state do not overlap with the guide ribs 12 in a side view,
Alternatively, since the overlapping width is set to a position equal to or less than the thickness dimension of one roll of the seedling, even in the initial feeding state, the rolled seedling 14 in the wound state slides on the guide rib 12 over two or more turns. Touching can be prevented. Therefore, a large sliding contact resistance between the guide rib 12 and the roll seedling 14 or an inconvenience in which the sliding contact resistance fluctuates greatly can be eliminated, and the roll seedling 14 can be smoothly fed out. It is possible to prevent the variation of the scraping amount and the occurrence of lack of stock due to the unwinding and to improve the planting accuracy.

When the roll seedling 14 is set in a penetrating manner from one end of the roll seedling holding shaft 27, a step 28a is previously formed at one end of the inner peripheral surface of the roll core 28, so that the step 28a The roll seedling 14 is locked at a substantially appropriate set position by contacting the one end side wheel plate 27b of the seedling holding shaft 27. Therefore, roll seedling 14
Can be simplified, and the roll seedlings 14 inserted from one end of the roll seedling holding shaft 27 can be prevented from dropping off from the other end. There is an advantage that the roll seedling 14 can be carried by holding one end of the roll seedling holding shaft 27.

Further, since the roll seedling 14 is allowed to move to one end while the roll seedling 14 is locked at the proper setting position, the set position of the roll seedling 14 is set on the seedling mounting surface 13. The situation where the position is shifted in the left and right direction,
Roll seedling 1 that has been wound with its position shifted in the left-right direction
In the situation where the roll seedling 4 is fed, the roll seedling 14 can be allowed to move to prevent twisting of the roll seedling 14, and as a result, inconveniences such as poor feeding caused by the twist of the roll seedling 14 can be resolved. .

Further, two rows of upper and lower rotating seed pressers 36, 46 are provided at positions opposing the lower vertical feed belt 19 to regulate the floating and lateral displacement of the rolled seedlings 14. , 46 can be independently moved in the roll seedling contact / separation direction, so that even if the thickness of the roll seedlings 14 varies, each seedling holding disk 43, 53 moves independently. As a result, the roll seedling 14 is appropriately pressed, and as a result, inconveniences such as the lower vertical feed belt 19 slipping and causing a variation in the vertical feed amount of the roll seedling 14 can be prevented as much as possible. it can.

When the lower first rotating seedling holder 36 is retracted, the first seedling holding frame 39 pushes up the second seedling holding arm 48, and the lower second rotating seedling holder 46 is also moved. The upper and lower two rows of lower rotating seed presser body 3
While 6, 6 and 46 are configured to be independently movable,
At the time of the evacuation operation, the upper and lower rows of the lower rotating seedling presser bodies 36, 4
6 can be integrally retracted, and as a result, seedling replenishment work and the like can be easily performed as compared with a case where the respective rotating seed presser bodies 36 and 46 are separately retracted.

Also, since the plurality of lower rotating seedling presser bodies 36, 46 facing the lower vertical feed belt 19 of each strip can be integrally retracted to the non-floating control position, The workability at the time of seedling replenishment and the like can be improved as compared with the case where the side rotating seedling presser bodies 36 and 46 are individually retracted.

Since the retreat holding mechanism 55 for holding the lower rotating seedling holders 36, 46 at the retracted position is provided, it is not necessary to hold the retracted lower rotating seedling holders 36, 46 by hand. As a result, workability at the time of seedling replenishment and the like can be improved.

Further, between the lower second rotating seedling presser body 46 and the apron 8, the roll seedling 14 rises due to the curl, the lateral displacement of the roll seedling 14 due to the sliding contact with the apron 8, and the scraping resistance. In providing the bar-shaped seedling presser body 60 for restricting the pulling out of the roll seedlings 14 and the like, the bar-shaped seedling presser body 60 is provided integrally with the lower second rotating seedling presser body 46. Even if the position adjustment and the like are not separately performed, the roll seedling 14 is appropriately pressed while moving in the roll seedling contacting / separating direction integrally with the lower second rotating seedling holder 46. 60 is a lower second rotating seedling presser body 46
In order to evacuate to the non-floating restriction position in conjunction with, the workability at the time of seedling replenishment and the like is improved compared to the case where the rod-shaped seedling presser body 60 and the lower second rotating seedling presser body 46 are separately evacuated. Can be done.

The vertical feed amount L2 of the vertical feed belt 19
Is set smaller than the apron entering amount (scraping amount) L <b> 1 of the planting nail 10, it is possible to prevent the roll seedling 14 from being pressed against the apron 8. Accordingly, it is possible to prevent the roll seedling 14 from rising, buckling, being damaged, or being displaced due to the pressing on the apron 8, and as a result, it is not possible to improve the planting operation accuracy. It can contribute to good growth after attachment.

The present invention is, of course, not limited to the above embodiment. For example, as in the second embodiment shown in FIG.
5 may be held at a proper feeding position by a stopper plate 61 provided on the holding portion bracket 22,
In this case, the support arm holding mechanism 26 of the first embodiment
There is an advantage that the structure can be simplified as compared with. In the first embodiment, the roll seedling 14 is held in a free rotation state. However, as in the third embodiment shown in FIG. Part 25c
(Sliding contact resistance between the roll seedling 28 and the roll core 28). In this case, there is an advantage that the inconvenience of the roll seedling 14 rotating in advance by inertia force can be avoided. Further, in the first embodiment, the means (step portion 28a) for locking the roll seedling 14 at the proper setting position is formed on the roll core 28 side. However, as in the fourth embodiment shown in FIG. Holding shaft 2
It may be formed on the seventh side. That is, in the fourth embodiment, the step 27c is formed on one wheel plate 27b of the roll seedling holding shaft 27, and the roll core 28 is locked at the proper setting position by contact with the step 27c. ing.
In the first embodiment, the sliding contact between the roll seedling 14 in the wound state and the guide rib 12 is prevented based on the setting of the holding height of the roll seedling 14 in the roll seedling holding section 21. As in the fifth embodiment shown, a notch 12a can be formed in the guide rib 12 to prevent sliding contact with the roll seedling 14.

[Brief description of the drawings]

FIG. 1 is a side view of a riding rice transplanter.

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

FIG. 3 is a front view (rear view) of an essential part of the same.

FIG. 4 is a sectional view of an essential part of the same.

FIG. 5 is a side view showing a retracting and holding mechanism of the lower rotating seedling presser body.

FIG. 6 is a side view of a main part of a planting section showing a second embodiment.

FIG. 7 is a cross-sectional view of a main part of a roll seedling holding unit according to a third embodiment.

FIG. 8 is a plan view of a main part of a roll seedling holding unit according to a fourth embodiment.

FIG. 9 is a side view of a main part of a roll seedling holding unit according to a fifth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Traveling machine body 3 Planting part 8 Apron 9 Seedling stand 10 Planting claw 12 Guide rib 13 Seedling surface 14 Roll seedling 16 Vertical feed mechanism 21 Roll seedling holding part 25 Support arm 27 Roll seedling holding axis 28 Roll core 28a Step part 36 Lower first rotating seedling holder 46 Lower second rotating seedling holder 55 Retraction and holding mechanism 60 Rod-like seedling holder L1 Penetration amount (scraping amount) L2 Vertical feed amount

Claims (2)

[Claims] 1. A roll seedling holding device for holding a rolled seedling on which a band-shaped seedling is rolled out, and a roll seedling continuously fed from an outer peripheral side along a seedling mounting surface partitioned by left and right guide ribs. A seedling mounting table that guides the seedlings downward, and a transplanting device that scrapes an appropriate number of seedlings from the rolled seedlings guided to the lower end of the seedling mounting surface and transplants the seedlings to a field. When holding the roll seedling at the mounting surface facing position, set the roll seedling holding position to a position where the roll seedling in the initial feeding state does not overlap with the guide rib in side view, or a position where the overlapping width is less than the thickness dimension of one roll seedling roll Transplanter. 2. A transplanter for holding the roll seedling according to claim 1 in a free rotation state or in a state where some rotation resistance is given.