JPH10327619A - Device for separately sending seedling of transplanter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject device capable of stably taking out and supplying seedlings by a seedling-taking out tine. SOLUTION: This device for separately sending seedlings of a transplanter has a tine-supporter 30 having a seedling-taking out tine 28 installed in the tip part thereof, a holding means 40 for supporting the tine-supporter 30 so as not to move in the direction in which the seedling taking out tine 28 plunges into a pot part, and a 1 tine-operating structure 32 for taking out the seedling with soil from the pot part by moving the seedling-taking out tine 28 through the holding means 40 to the pot part and plunging the seedling taking out line 28 to the pot part and further by moving the tine supporter 30 so as to port from the pot part, and conveying the taken out seedling with the soil to a transplanting means. Further the device has a seedling-releasing member 31 for releasing the seedling with the soil from the seedling-taking out tine 28 by advancing to the tip side of the seedling-taking out tine 28 when the seedling- taking out tine is moved to the transplanting means, and retreating to the base side of the seedling-taking out tine 28 before the plunge of the seedling- taking out tine to the seedling with the soil, and installed in the tine-supporter 30 so as to freely advance and retreat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling feeder of a transplanting machine for transplanting vegetables such as cabbage, lettuce, Chinese cabbage, broccoli and the like.

[0002]

2. Description of the Related Art Vegetable transplanters for raising seedlings in seedling trays having pot portions in a vertical and horizontal lattice arrangement, and taking out soiled seedlings from the pot portions and transplanting them are known. ing. As disclosed in Japanese Unexamined Patent Application Publication No. 8-214627, a seedling feeding device of this kind of vegetable transplanter includes a pair of seedling removal claws that can enter a soiled seedling in a pot portion of a seedling tray, and a pair of seedling removal claws. A claw support provided at the distal end with the seedling removal claws separated from each other, and the claw support is supported by a claw operating mechanism via a holding member so as to be able to advance and retreat in a direction in which the seedling removal claws enter. A nail guide for detaching the seedlings held by the seedling removal nails is supported on the nail support so as to be able to advance and retreat.

The above-mentioned claw operating mechanism reciprocates a claw support and a claw guide between a pot portion of a seedling tray and a planting means via a holding member. After moving the seedling removal claw to the near position, the nail support is slid with respect to the holder to advance, so that the seedling removal claw rushes into the soild seedling, and the claw support is potted through the holder. The seedling removal claw is taken out of the pot by moving it away from the part, and the seedling is planted while the posture of the nail support is changed from the posture facing the pot to the substantially vertical posture facing the planting means. And the nail guide is advanced to the tip side of the seedling removal nail to separate the seedling from the nail and supply it to the planting means, and immediately after the seedling is separated, the nail guide and the nail support are removed. The holder is made to exit.

[0004] In addition, the above operation causes the toe of the seedling removal nail to reciprocate in a substantially eight-shaped locus.

[0005]

In the above-mentioned prior art seedling feeding apparatus, a tubular claw support is inserted into a cylindrical holder and a claw guide is inserted into the claw support tube. It is a multi-tubular and complicated structure, and the claw support and the claw guide are individually advanced and retracted with respect to the holding body. Had become.

Since the holder, the claw support and the claw guide are slid relative to each other, the abrasion or the like is likely to occur, which may cause backlash. In addition, the crank is required to advance the claw support to the holder. Since a cam mechanism and the like are used, wear and the like are liable to occur in this portion as well. If play occurs due to wear or the like, the toe of the seedling removal claw may be displaced and hinder smooth removal and supply of the seedling.
Therefore, it has been necessary to frequently make adjustments and the like. Also,
Since the seedling removal claw is moved along a complicated trajectory of approximately eight characters, such adjustment and the like are also difficult.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to simplify the structure and operation of a seedling feeding device so that stable seedling extraction and supply can be performed for a long time. And

[0008]

The present invention employs the following technical means to achieve the above object. That is, according to the present invention, the seedling removal claws 28 are inserted into and out of the soiled seedlings 5 in the pot portion 29 of the seedling tray 25, thereby removing the soiled seedlings 5 from the pot portion 29, and removing the soiled seedlings 5 thus removed. A seedling feeding device of a transplanter, which is adapted to be transported to and supplied to a planting means 19, comprising: a nail support 30 provided with the seedling extraction nail 28 at a tip thereof; Holding means 40 for immovably supporting the seedlings in the direction of rushing into the pot portion 29, and moving the claw support 30 toward the pot portion 29 via the holding means 40, so that the seedling removal claws 28 can be soiled. And the nail support 30 is moved away from the pot portion 29 so that the seedling removal nail 28
And a claw operating mechanism 32 for taking out the soild seedling 5 from the seedling 9 and transferring it to the planting means 29. When the seedling extracting nail 28 is moved to the planting means 19, it is advanced to the tip side of the seedling extracting nail 28. The soiled seedling 5 is detached from the seedling extraction nail 28 and the seedling extraction nail 28
A seedling detaching member 31 that retreats to the base end side of the seedling removal claw 28 before entering the seedling 5 with soil is provided on the claw support 30 so as to be able to advance and retreat.

According to this, the nail support 30 is immovably supported by the holder 52 in the direction in which the seedling removal nail 29 enters.
Since the seedling removal claw 28 has protruded into the soiled seedling 5 by the movement of the claw operating mechanism 32 via the holding body 52, the claw support 28 advances and retracts relative to the claw operating mechanism 91 as in the conventional case. There is no need for a complicated operation or structure for
The wear and the like caused by the advancing and retreating motion of the vehicle are eliminated. Further, only the seedling detaching member 31 advances and retreats with respect to the seedling removal claw 28, so that the seedling supply to the planting means 19 can be reliably performed.

Further, according to the present invention, the claw operating mechanism 32 includes:
The toe of the seedling removal claw 28 is moved along a closed-loop locus between the position P1 before the pot portion 29 and the ending end position P2 into the pot portion 29, and the position of the toe portion P1 of the pot portion 29 and the planting means 19 are moved. A claw guide means 32A for reciprocating the seedling supply position P3 with substantially the same locus;
According to this, when the seedlings are taken out, by drawing a closed loop-shaped trajectory on the toes, the trajectory and the exit trajectory to the soiled seedling 5 can be changed so that the seedlings 5 can be reliably taken out from the pot portion 29. By reciprocating between the position in front of the pot portion 29 and the planting means 19 along substantially the same locus, the position adjustment of the seedling removal claw 28 can be easily performed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 11, the vegetable transplanter 1
It is a walking type having a steering handle 3 at the rear of the traveling vehicle 2, and runs at predetermined intervals on the ridges 4 covered with the multi-film M while running in the longitudinal direction across the ridges 4. .

In the following description, the traveling direction (arrow E) of the transplanter 1 is referred to as the front-back direction, and the lateral direction orthogonal to the traveling direction is referred to as the left-right direction. In the traveling vehicle 2, a gantry 7 is attached and fixed to a front portion of a transmission case 6, and an engine 8 and the like are mounted on the gantry 7, and the engine 8 is covered with a hood 9. The power of the engine 8 is transmitted to a transmission case 6 via a wrapping transmission device, and a wheel transmission shaft 10 protruding left and right from the transmission case 6 is provided behind the wheel transmission shaft 10 so that the left and right sides are provided. The first projecting toward
The PTO shaft 11 and the second PTO shaft 12 projecting rearward and upward are taken out by three systems.

Left and right drive wheels (rear wheels) 14 are supported at the left and right ends of the wheel transmission shaft 20 via a transmission case 13 which swings up and down around the axis. The drive wheels 14 can be driven. A front wheel 15 is provided at a front portion of the traveling vehicle, and the front wheel 15 and the drive wheel 14 roll in a groove between the ridges 4. A transplant frame 17 is provided at the rear of the traveling vehicle 2, and a transplant device 18 is provided on the transplant frame 17. This transplantation device 1
8 is a planting means 19 for planting the soiled seedlings 5 in the ridges 4 and a seedling supply device 20 for supplying the soiled seedlings 5 to the planting means 19.
And a soil covering ring 21 for covering and crushing the roots of the planted soild seedlings 5 and a piercing means 22 for forming planting holes in the multi-film covering the ridges 4. The planting means 19 and the perforating means 22 are driven by power transmitted from the first PTO shaft 11, and the seedling supply device 20 is driven by the second PTO shaft.
Power is transmitted from the shaft 12 and driven.

The transplant frame 17 includes a main frame 23 having a front portion fixed to the transmission case 6 and a first portion having a first portion.
Device frame 24 pivotally attached to PTO shaft 11
It is composed of The seedling supply device 20 is provided on the main frame 23, and the steering handle 3 is attached to the rear end of the main frame 23.
, A planting means 19, a covering soil ring 21 and a drilling means 22 are supported. The planting means 1 is provided in front of the seedling supply device 20.
9 are arranged, a perforating means 22 is arranged in front of the planting means 19, and an earth covering ring 21 is arranged in the rear.

The planting means 19 is supported by a swinging link mechanism so as to move up and down while moving back and forth. At the upper part of the locus, the seedling supply device 20 drops and supplies the soiled seedlings 5 and beaks it at the lower part. The opener can be opened and closed freely, and when it enters the ridge 4 at the lower end of the trajectory, the opener opens back and forth, forming a planting hole in the ridge 4,
The soild seedling 5 held in the planting means 19 can be planted in the planting hole.

The piercing means 22 is supported by a parallel link so as to move up and down in conjunction with the swinging link mechanism of the planting means 19, and when the piercing means 22 is lowered, a heating element provided at the lower end thereof is multiplied. By pressing against the film, a hole for implantation is formed in the multi-film.
A pair of soil covering wheels 21 are arranged in a pair on the left and right sides of the seedling planting portion behind the planting means 19, roll on the upper surface of the ridge 4, support the rear part of the device frame 24, and remove the soil at the root of the seedlings. Press from both sides to crush the soil at the same time.

The seedling supply device 20 includes a seedling tray feeding device 26 for intermittently feeding a seedling tray 25 containing a large number of soil block seedlings vertically and horizontally, and a seedling tray feeding device 26 disposed in front of the seedling tray feeding device 26. A seedling delivery device 27 for taking out the soiled seedlings 5 one by one from the tray 25 at a predetermined seedling removal position with the seedling removal claw 28, transferring the seedlings 5 forward, and dropping the seedlings from above the planting means 19; It is configured.

The seedling tray 25 is made of resin and has flexibility, and a large number of pots 29 arranged vertically and horizontally are formed so as to open to the front and protrude to the back. 5 are raised. The seedling feeding device 27 includes a pair of needle (chopstick) -shaped seedling removal claws 28, a nail support 30 provided with the pair of seedling removal claws 28 at the ends thereof, and a left-right axis. A holding means 40 rotatably supported around the center so as to be immovable in a direction in which the seedling removal claw 28 enters the pot portion 29, a claw operating mechanism 32 for operating the claw support 30 via the holding means 40, And a seedling detaching member 31 supported by the nail support 30 so as to be able to advance and retreat in the longitudinal direction.

The nail operating mechanism 91 reciprocates the seedling extracting nail 28 between the seedling tray 25 and the planting means 19 in the toe trajectories X, Y, and Z shown in FIGS. The support frame 3 fixed on the main frame 23
3 by the rotational power from the second PTO shaft 12 in FIG.
Rotary shaft 35 driven to rotate counterclockwise in 5 to 5
And a crank body 36 and a drive cam 37 which are fixed to the rotating shaft 35 and also rotate counterclockwise.

A lower portion of a swing arm 38 is pivotally connected to the support frame 33 below a crank body 36 by a swing shaft 39.
A claw support 30 having a pin 8 is rotatably connected to a left-right axis via a pin (holding means) 40, and a groove extending in the up-down direction (arm longitudinal direction) is provided in the middle of the swing arm 38. A cam 41 is formed, and a crank pin 42 provided at the tip of the crank body 36 is inserted into and engaged with the groove cam 41.

When the crank body 36 rotates, the swing arm 38 swings back and forth via the crank pin 42, and the crank body 36 rotates counterclockwise, so that the swing arm 38 moves backward (to the side of the seedling tray feeding device 26). ), And swings forward (toward the planting means 19 side) slowly. Therefore, when moving the seedling removal claw 28 along the toe trajectories Z to X from above the planting means 19 to the seedling tray feeder 26, the movement is accelerated, and after removing the soiled seedling 5 from the pot portion 29, planting is performed. When moving the seedling extraction claw 28 to the means 19 in the toe trajectory Y to Z, it moves slowly.
The soild seedlings 5 are returned quickly while being prevented from falling during transfer, thereby improving the efficiency of seedling removal and supply.

As shown in FIGS. 6 and 7, the nail support 30
Is formed in a tubular shape, and a pair of left and right seedling removal claws 28 are provided at the front end (rear end) thereof through shaft portions 28a at the base end (front end), respectively. It is possible to swing right and left so that the tip moves far and near. A middle part of the seedling detaching member 31 is penetrated through the cylinder of the nail support 30 movably in the axial direction, and the seedling detaching member 31 has a seedling pushing tool 43 at a front end (rear end). In addition, this seedling pressing tool 43
Is formed with a guide hole 43a through which the seedling removal claw 28 is inserted.

The rod-like portion of the seedling detaching member 31 disposed in the cylinder of the claw support 30 has a stopper 44 at an intermediate portion in the longitudinal direction.
On the other hand, a receiving member 45 is provided in the cylinder of the claw support 30 in front of the stopper 44, and a compression coil spring 46 is interposed between the receiving member 45 and the stopper 44. ing. Therefore, the seedling detaching member 31 is attached to the nail support 30.
Urged by a compression coil spring 46 so as to advance backward in the axial direction, and is engaged by a locking piece 47 provided on the seedling detaching member 31 and a lock piece 48 provided below the claw support 30. Restricted to the exit position.

The lock piece 48 is rotatably supported on the pawl support 30 by a left-right axis pin 49. The upper end of the lock piece 48 is disposed in the cylinder of the pawl support 30 and engages with the hook 37. The lower end protrudes downward from the claw support 30. The upper end of the lock piece 48 is biased by the urging means.
7 is urged in the direction of engagement. Therefore, by rotating the lock piece 48 against the urging means, the engagement with the hook piece 47 is released, and the seedling detaching member 31 advances rearward with respect to the claw support 30. I have. The advance of the seedling detaching member 31 is regulated by the stopper 44 abutting on the front end of the nail support 30 in the cylinder.

A roller 51 is attached to the pawl support 30 via a bracket or the like so as to be freely rotatable.
It is engaged with a cam groove 54 formed in a guide plate 53 that is swingably attached to the upper part of the support frame 33 via a pin 52. The guide plate 53 has a rolling roller 55 at the tip of a protruding arm projecting downward.
Is in contact with the drive cam 37, and the guide plate 53 can swing about the pin 52 by the counterclockwise rotation of the drive cam 37.

Therefore, the roller 51 rolls in the cam groove 54 of the guide plate 53, and the guide plate 53 swings up and down by the rotation of the drive cam 37 about the pin 52.
Claw guide means 3 for regulating the posture of the claw support 30 so that the toe of the seedling removal claw 28 draws trajectories X, Y, and Z described below.
2A. When the seedling removal claw 28 protrudes into the pot portion 29 of the seedling tray 25, that is, in FIGS. 1 and 2, the depth direction depth portion of the pot portion 29 indicated by P <b> 2 from the position in front of the pot portion 29 indicated by P <b> 1 (seeding When the seedling removal claw 28 moves to the position where the claw 28 enters the end position, the swing arm 3
8, the claw support 30 via the pin 40 and the pot portion 2
9 in a direction approaching the seedling 9,
The position of the claw support 30 is regulated by the cam groove 54 so as to draw a locus X that scoops the leaves from the lower side.
The seedling extraction nail 28 is stabbed obliquely with respect to the center line of.
Thus, by piercing the seedling removal nail 28 in an oblique direction while scooping the seedling leaves, the seedlings are not damaged.

On the other hand, the seedling detaching member 31 is in a state where the seedling pushing tool 43 at the tip is advanced at the position P1 before the pot portion 29, and is opposed to the protrusion of the seedling removing claw 28 into the soiled seedling 5. I'm leaving. That is, a contact piece 56 is fixed to the front end of the seedling detaching member 31, a hitting tool 57 that contacts the contact piece 56 is fixed to the guide plate 53, and the nail support 30 is directed toward the pot 29. When moving, the contact piece 56 comes into contact with the hitting tool 57 to relatively lower the seedling detaching member 31, and the pulled seedling detaching member 31 is locked via the lock piece 48 in the cylinder of the claw support 30. It is supposed to be.

The right and left guide holes 43a of the seedling pushing tool 43 are provided.
The interval is formed narrower than the interval between the shaft portions 28a of the left and right seedling removal claws 28, and when the seedling pushing tool 43 advances to the seedling removal nail 28 as shown by a two-dot chain line in FIG. The toe of the seedling extraction nail 28 is expanded, and when the seedling pushing tool 43 is withdrawn, the toe interval of the seedling extraction nail 28 is narrowed.

Next, when removing seedlings with soil from the pot portion 29, the seedling removal claw 28 moves from the depth P2 in the depth direction of the pot portion 29 to the original pot portion front position P1. At this time, the exit trajectory Y passes above the trajectory X, and the seedlings are taken out while drawing a substantially V-shape by the trajectories XY. Therefore, when removing the seedlings, P1 to P
A closed-loop trajectory passing through 2 to P1 is drawn.

The movement of the claw guide means 32A at this time is caused by the swinging movement of the guide plate 53 around the pin 52 via the drive cam 37, and the rear side of the claw support 30 (the seedling removal claw 28). The trajectory X, Y of the seedling removal claw 28 is made substantially V-shaped by rotating the claw support 30 so as to raise the side (side). Then, after removing the soiled seedling 5, the driving cam 37 returns the seedling removing claw 28 to the position based on the guide plate 53 so as to return to the position P1.

As described above, by changing the trajectory when entering the soiled seedling 5 and when exiting from the pot portion 29,
When the seedlings 5 are pulled out, the seedling removal claws 28 are prevented from falling out of the soiled seedlings 5. Next, the seedling removal nail 28
Moves from the pot portion near position P1 to a position above the planting means 19 indicated by P3 while the soiled seedling 5 is pierced and held. At this time, the position of the claw support 30 is changed from the horizontal position to the substantially vertical position by the cam groove 54 and the driving cam 37, whereby the seedling removal claw 28 draws a substantially arc-shaped locus indicated by the locus Z. . Therefore, the cam groove 54
5 (left side in FIG. 5), the roller 51 is
Is moved in a direction away from the swing shaft 39 of
The drive cam 37 is formed to swing the guide plate 53 upward.

To the position P3 above the planting means 19, the seedling removal claw 2
8 moves, the lock piece 48 of the claw support 30 comes into contact with the lock release member 58 provided on the guide plate 53, and the lock piece 48 is disengaged from the hooking piece 47 of the seedling detaching member 31, and the compression coil spring 46 makes the tip thereof. Advance to the side. As a result, the seedling pressing tool 43 comes into contact with the shoulder of the soiled seedling 5 and the seedling removal nail 2
8 and fall down onto the planting means 19.

At this time, the crank pin 42 passes through the circular arc portion 41a of the groove cam 41 of the swing arm 38. The circular arc portion 41a is formed in an arc centered on the rotation shaft 35. Therefore, the swing arm 38 does not swing due to the rotation of the crank body 36. Therefore, during this time, the claw support 30 stops at one end and the planting means 19
To ensure that the seedlings can be delivered to

After the seedling 5 with the soil is removed from the seedling removal nail 28, the seedling removal nail 28 is again moved in the opposite direction along the locus Z to the position P1 before the pot portion 29, and the above-described operation is repeated. . In this manner, the reciprocating movement between the position in front of the pot portion 29 and the planting means 19 is performed on substantially the same trajectory Z, so that the seedling extracting nail 28 can be quickly moved without making a round trip, and the seedling extracting nail 28 can be moved. The position adjustment, the adjustment of the trajectory, and the like can be easily performed.

As shown in FIG. 8, the seedling tray feeder 26 has a seedling mounting table 59 on which the seedling tray 25 is mounted, and the seedling mounting table 59 is moved right and left by upper and lower guide rails 60 fixed to the handle 3. It is movably supported and has a mounting plate 61 on which the seedling tray 25 is mounted, and side plates 62 arranged on both left and right sides of the mounting plate 61 to face each other. A feed drive shaft 63 is disposed in the left-right direction, and a vertical feed driven shaft 64 is disposed in the left-right direction above the left and right side plates 62.
Is wound. Engagement pins 66 that engage between the front and rear of the pot portion of the seedling tray 25 are provided at predetermined intervals on the transport chain 65, and the rotation of the drive shaft 63 causes the seedling tray 25 to be vertically fed via the engagement pins 66. .

A lateral feed shaft 68 having a spiral groove is provided between the left and right side plates 62 via a support bearing 67 provided on the handle 3.
Are provided in a penetrating manner, and a slider 69 that engages with the spiral groove is externally fitted to the lateral feed shaft 68, and the slider 69 is connected to the mounting plate 61 of the seedling mounting table 59. 2nd PTO shaft 1
2 is transmitted to the gear case 34 via the transmission shaft 70, and transmitted from the gear case 34 to the traverse shaft 68 via the wrapping transmission mechanism 90. The traverse shaft 68 is intermittent. The slider 69 is moved right and left by the rotation of the horizontal feed shaft 68 to move the seedling mounting table 5.
9 is intermittently traversable.

Vertical feed cams 71 are fixed to the left and right sides of the horizontal feed shaft 68, and a vertical feed operation shaft 72 is rotatably supported between the left and right side plates 62 on the seedling mounting table 69. The follower 73 engages with the vertical feed cam 71 when the seedling placing table 69 moves to the leftmost end or the rightmost end.
A, 73B are provided. This follower 73A, 73
B, as shown in FIG. 9, a pair of upper and lower arms 74 is provided at the tip of a vertically bifurcated arm 74, and the lower follower 73A contacts the vertical feed cam 71 to rotate the operating shaft 72 in the direction of arrow C. The upper follower 73B comes into contact with the vertical feed cam 71 to rotate the operating shaft 72 in the direction of arrow D.

The left end of the vertical feed operation shaft 72 is connected to the left side plate 6.
2, a connection piece 75 protruding leftward and protruding upward.
Is fixed. The connecting piece 75 is connected to an unlocking lever 77 via an interlocking rod 76, and the unlocking lever 77 is attached to the left end of a vertical feed drive shaft 63 projecting leftward from the left side plate 62 by a one-way. Clutch 7
8.

Further, on the left and right inner sides of the lock release lever 77, first and second vertical feed gears 79, 80 provided with engagement teeth 79a, 80a having different pitches around the axis of the drive shaft 63.
The first and second vertical feed gears 79 and 80 are idled by the one-way clutch 78 in the direction indicated by the arrow A with respect to the lever 77, and do not rotate in the opposite direction. It has become.

Therefore, when the lever 77 is rotated in the direction indicated by the arrow A, the first and second vertical feed gears 79 and 80 follow, and when the lever 77 is rotated in the opposite direction, the first and second vertical feed gears 79 and 80 are rotated. , 80 are stopped, and only the lever 77 rotates. Above the first and second vertical feed gears 77, there are first and second ratchet arms 8 for restricting rotation of these gears.
The first and second ratchet arms 81 and 82 are rotatably supported around a left-right pivot 83 fixed at the rear upper portion to the left side plate 62 side. Engaging teeth 7 of the vertical feed gears 79, 80
It has engaging portions 81a and 82a that engage with 9a and 80a, and engaging surfaces 81b and 82b that engage with an engaging pin 77a provided on the lock release lever 77.

The first and second ratchet arms 81,
A tension spring 84 is provided at the distal end of 82 so as to urge the respective engaging portions 81a and 82a in the direction of engaging with the engaging teeth 79a and 80a. In the vicinity of the lower portions of the first and second ratchet arms 81 and 82, one of the first and second ratchet arms 81 and 82 is selectively pushed up so that the ratchet arms 81 and 82 that are pushed up are engaged. Part 81
There is provided a selection member 85 for separating the a, 82a from the engagement teeth 79a, 80a.

When the lateral feed shaft 68 rotates in the direction of arrow B, the seedling mounting table 69 moves to the left and right ends.
The vertical feed cam 71 abuts the lower follower 73A, and rotates the operating shaft 72 in the direction of arrow C (two-dot chain line in FIG. 9). As a result, the interlocking rod 76 is pulled rearward via the connecting piece 75, and the lock release lever 77 swings rearward, and the engaging pin 77a of the lever 77 is engaged with the engaging surfaces 81b, 82b of the ratchet arms 81, 82. The ratchet arms 81, 82 are pushed up while engaging with the engaging members 81, 82, and the engaging portions 81a, 82a of the arms 81, 82 are disengaged from the engaging teeth 79a, 80a.

At this time, only the lock release lever 77 is rotated by the one-way clutch 78 in the direction opposite to the arrow A direction, and the vertical feed gears 79 and 80 are not rotated. When the horizontal feed shaft 68 further rotates in the direction of arrow B, the vertical feed cam 71 comes into contact with the upper follower 73B and
2 is rotated in the direction of arrow D (solid line in FIG. 9), whereby the interlocking rod 76 is pushed forward through the connecting piece 75, and the lever 77 is rotated in the direction of arrow A. At this time, the first and second vertical feed gears 79, 80 rotate in the direction of the arrow A together with the lever 77 to be fed by one pitch of the engagement teeth, and the ratchet arms 81, 82 engage with the engagement surfaces 81b, 82b. By the action of the mating pin 77a, it returns to swing downward and the vertical feed gear 7
The engaging portions 81a, 82
a engages and locks.

With the above operation, the vertical feed drive shaft 63 is rotated by a predetermined amount via the vertical feed gears 79 and 80, and the seedling tray 2 is rotated.
5 can be fed vertically by one pot portion, and the selection member 85 selects and uses the first and second ratchet arms 81 and 82 (the first and second vertical feed gears 79 and 80). Seedling tray 2 with different pot pitch
5 is possible.

The vertical feed operation shaft 72 is provided with a vertical feed cam 71.
And the followers 73A, 73B, so that the vertical feed drive shaft 63 has a different rotation amount (feed amount) depending on the pot pitch of the seedling tray 25 to be used. The difference in the amount of rotation between the two shafts 72 and 63 is absorbed by the long hole 76a formed in the interlocking rod 76 and the connecting pin 77b of the lock release lever 77 inserted therethrough.

That is, the rotation amount of the vertical feed operation shaft 72 is
When the seedling tray with a large pot portion pitch is used, it corresponds to the feed amount of the vertical feed drive shaft 63, and when the seedling tray 25 with a small pot portion pitch is used, the lock release lever 77 corresponds to a small pitch via the interlocking rod 76. After swinging forward and stopping, only the interlocking rod 76 is moved further forward within the range of the elongated hole 76a.

A tension spring 86 is provided between the tip of the interlocking rod 76 and the lock release lever 77. When the interlocking rod 76 is pulled backward, the lever 77 swings rearward via the good pin 76a and the connecting pin 77b. When moving and pushing the interlocking rod 76 forward, the lever 77 swings forward via the tension spring 86, and the extension of the spring 86 allows relative movement between the interlocking rod 76 and the lock release lever 77.

As described above, when the lock release lever 77 is swung backward, the engaging portions 81a, 82a of the ratchet arms 81, 82 are engaged with the engaging teeth 79 of the vertical feed gears 79, 80.
At this time, the anti-slip means 87 for preventing the vertical feed drive shaft 63 from idling in the direction of arrow A due to the load of the seedling tray 25 on the seedling mounting table 69 is provided. Is provided.

The idling prevention means 87 includes first and second lock claws 88 and 8 pivotally supported by a support member 77c projecting rearward from the lock release lever 77 so as to be rotatable around the left and right axes.
9, and the lower ends of the lock claws 88, 89 are respectively engaged with the engagement teeth 79a, 80 of the first and second vertical feed gears 79, 80.
a, the vertical feed gear 79,
The rotation of arrow 80 in the direction of arrow A is regulated. The lock claws 88, 89 are biased by a torsion spring or the like in a direction in which the lock claws 88, 89 are engaged with the engagement teeth 79a, 80a.

The first and second ratchet arms 81, 8
2 includes an engagement piece 8 that engages with the upper ends of the lock claws 88 and 89.
1c and 82c are formed. When the ratchet arms 81 and 82 swing upward by the operation of the lock release lever 77 and the engaging portions 81a and 82a are disengaged from the engaging teeth 79a and 80a, the engagement is performed. The lock claws 88, 89 rotate along the pieces 81c, 82c, and engage with the engagement teeth 79a, 80a of the gear.

In this state, the lock release lever 77
When the ratchet arms 81 and 82 are pivoted downward by the operation described above, the engaging portions 81a and 82a are engaged with the engaging teeth 79a and 80a.
And the lower ends of the lock claws 88, 89 are separated from the engagement teeth 79a, 80a along the engagement pieces 81c, 82c. As shown in FIG. 10, the second lock pawl 89 is not always engaged with the second vertical feed gear 80 not selected by the selection member by the engagement piece 82 c of the second ratchet arm 82. It has become.

As described above, even if the lock release lever 77 is swung rearward to release the lock of the vertical feed gears 79, 80 by the ratchet arms 81, 82, the vertical feed gears 88, 89 of the idling prevention means 87 do not. The rotation of the vertical feed drive shaft 63 due to the weight of the seedling tray 25 and the like is prevented by preventing the rotation of the seedling tray 25 in the direction of arrow A 79, 80. In addition,
The present invention is not limited to the above embodiment, and can be variously modified. For example, the transplanting device 23 of the transplanting machine 21 is configured as a self-propelled walking type, but may be configured as a riding type mounted on a traveling vehicle, or may be configured as a single-row plant and two or more multi-row plants. Can be.

[0053]

According to the present invention described in detail above, the structure and operation of the seedling feeding device are simplified, wear of the nail support, etc. is prevented, and stable seedling extraction and supply can be performed for a long time.

[Brief description of the drawings]

FIG. 1 shows a seedling feeder according to an embodiment of the present invention,
It is a side view before a seedling removal nail enters into a pot part.

FIG. 2 is a side view showing a state in which the seedling removal claw is inserted into a pot portion.

FIG. 3 is a side view immediately after taking out the seedling.

FIG. 4 is a side view after removing the seedling.

FIG. 5 is a side view of the seedling immediately after detachment.

FIG. 6 is a side sectional view showing a main part of the seedling feeding device.

FIG. 7 is a plan sectional view of the same.

FIG. 8 is a front sectional view showing a seedling tray feeding device.

FIG. 9 is a side view showing a vertical feed portion.

FIG. 10 is a side view showing a main part of a vertical feed portion.

FIG. 11 is a side view showing the entire transplanter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Transplanter 5 Soiled seedling 19 Planting means 25 Seedling tray 27 Seedling feeding device 28 Seedling removal nail 29 Pot part 30 Claw support 31 Seedling detaching member 32 Claw operating mechanism 32A Claw guide means 52 Holding means

Claims (2)

[Claims] 1. A pot portion (2) in a seedling tray (25).
9) The seedling removal claws (28) are inserted into and out of the soiled seedling (5), thereby removing the soiled seedling (5) from the pot portion (29) and planting the soiled seedling (5). Attaching means (19)
A seedling feeder for a transplanter, wherein the seedling removal nail (28) is provided at the tip thereof (30).
Holding means (40) for supporting the nail support (30) immovably in the direction in which the seedling removal nail (28) enters the pot portion (29); and nail supporting means via the holding means (40). By moving the body (30) toward the pot (29), the seedling removal claw (28) enters the seedling with soil (5) and the claw support (30) moves away from the pot (29). A claw operating mechanism (32) for taking out the soiled seedling (5) from the pot portion (29) with the seedling removing claw (28) by moving it and transferring it to the planting means (19); Is moved to the planting means (19) to advance to the tip side of the seedling removal nail (28), thereby detaching the soiled seedling (5) from the seedling removal nail (28) and the seedling removal nail (28). Seedlings with soil (5)
A seedling detaching member (31) that retreats to the base end side of the seedling removal nail (28) before entering the seedling; 2. The claw operating mechanism (32) moves a toe of a seedling removal claw (28) to a position (P1) in front of a pot portion (29).
And the end position (P2) of entry into the pot portion (29) in a closed-loop locus, and the position (P1) just before the pot portion (29) and the seedling supply position to the planting means (19) ( The seedling feeding device for a transplanting machine according to claim 1, further comprising a claw guide means (32A) for reciprocating between the P3 and the P3) along substantially the same locus.