JPH08205629A - Seedling feeder for transplanter - Google Patents

Abstract

PURPOSE: To prevent roots of seedlings with soil from being damaged by scooping the seedlings with soil from a pot part and to keep the roots of the seedlings with soil from being brought into contact with a seedling tray by sufficiently drawing out the seedlings with soil from the pot part. CONSTITUTION: This seedling feeder for a transplanter is equipped with a crawl operating mechanism 42 to reciprocate a crawl 39 between a seedling taking out position and a seedling feeding position and moves the tip of the crawl 39 so as to draw an approximately 8-shaped orbit in a side view. The tip of the crawl 39 is thrust into the soil of seedlings C with soil and the seedlings with soil are scooped up to take out the seedlings C with soil from a pot part 40 and transported toward a seedling feeder while approximately retaining the inclined position in the removal of the seedlings with soil. The loci of the tip of the crawl 39 cross approximately at the center of the seedling taking out position and the seedling feeding position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling feeding device of a transplanter for feeding soil-grown seedlings raised in a seedling tray to a planting device.

[0002]

2. Description of the Related Art For example, in a seedling feeding device of a transplanter disclosed in Japanese Patent Laid-Open No. 4-330211, a seedling taking-out claw has a seedling taking-out position for taking earthed seedlings from a pot portion of a seedling tray.
A claw actuating mechanism that reciprocates the seedling take-out claw is provided between the planting device and a seedling supply position where the soil-grown seedling is dropped from above.

[0003] In this seedling feeding device, after a pair of seedling take-out nails are pierced into a substantially central portion of the seedling soil for soil-bearing seedlings, the pair of seedling take-out nails are brought close to each other so that the soil-bearing seedlings are straightened from the pot portion. It is configured to pick up.

[0004]

However, in the above-mentioned conventional seedling feeding device, when a pair of seedling take-out nails are brought close to each other to grab the seedling soil of the soil-grown seedlings, the roots in the seedling soil are cut by the seedling take-out nails. It was hurt. Therefore, the present invention prevents the damage of the root by scooping the soil-grown seedlings from the pot portion, and the roots of the soil-grown seedlings are brought into sliding contact with the seedling tray by sufficiently pulling out the soil-grown seedlings from the pot portion. The purpose is to prevent and protect the roots.

[0005]

In order to achieve the above object, the present invention takes the following technical means. That is,
The present invention provides a claw operation for reciprocating a seedling take-out nail between a seedling take-out position where the soil-seeded seedling is taken out from the pot portion of the seedling tray and a seedling supply position where the soil-seeded seedling is dropped into the planting device from above. A seedling supply device of a transplanter, which is provided with a mechanism and moves the tip of the seedling take-out nail so as to draw a locus having a substantially 8-shape in a side view, wherein the nail actuating mechanism has the nail At the seedling take-out position, pierce the seedling soil of the soil-bearing seedlings and then scoop it up to take out the soil-bearing seedlings from the pot portion and transfer them toward the feeding position while maintaining the inclined posture at the time of taking-out. The locus of the tip of the seedling take-out claw is characterized by intersecting at the approximate center between the seedling take-out position and the seedling supply position.

[0006]

[Operation] After the tip of the seedling picking nail is pierced into the seedling soil of the soil-bearing seedling, the soil-bearing seedling is taken out from the pot portion by scooping up. As described above, the present invention does not forcefully pick up the seedling soil with the seedling take-out nails, so that the root in the seedling soil is less likely to be damaged by the seedling take-out nails.

Also, the approximately 8-shaped locus of the tip of the seedling take-out claw is made to intersect at the center of the seedling take-out position and the seedling supply position. This means that the seedling take-out claw approaches the seedling take-out position. Rather than the distance between the nail tip and the seedling tray when doing, means that the distance between the nail tip and the seedling tray when the seedling take-out nail holding the soil-grown seedling leaves the seedling take-out position is sufficiently large, Therefore, soiled seedlings are sufficiently pulled out above the pot part and then transferred to the seedling supply position, and it is possible to prevent the roots of soiled seedlings from sliding on the seedling tray, thereby protecting the roots. To be

[0008]

Embodiments of the present invention will be described below with reference to the drawings. The vegetable transplanter 11 shown in FIG.
It is a walking type having a steering handlebar 13 at the rear part, and is a plant for planting seedlings C with soil at a predetermined interval while straddling the ridge 14 and traveling in the longitudinal direction thereof.

The traveling vehicle body 12 comprises a main frame 15, a pedestal 16 provided at the front end of the main frame 15, and the like. An engine 17 is mounted on the gantry 16, the engine 17 is covered by a bonnet 18, a mission case 19 is fixed to the rear part of the gantry 16, and its input part and the output part of the engine 17 are wound and transmitted. It is linked by the body 20.

The power from inside the mission case 19 is taken out by two systems of a wheel transmission shaft 21 and a PTO shaft 22, and the left and right ends of the wheel transmission shaft 21 swing up and down around the axis. Left and right drive wheels 2 via the transmission case 23
4, the drive wheels 24 can be driven by the winding transmission body in the transmission case 23. This drive wheel 24 is the ridge 1
It rolls in the groove between 4. A front part of the traveling vehicle body 12 is provided with a pair of left and right front wheels 25 and a ridge-shoulder copying roller 26.

The main frame 15 of the traveling vehicle body 12 is formed of a square pipe or the like, and the front portion thereof is bent downward to form the pedestal 1
It is fixed to the side portion of the steering wheel 6, and the rear portion is bent upward to serve as a mounting portion for the steering handle 13. Running car body 1
A transplanting work unit 30 is provided at the rear of the unit 2. The transplanting work unit 30 includes a seedling supply device 10 and the seedling supply device 1
It has a planting device 31 for planting the soil seedling C supplied from 0 in the ridges 14 and swings up and down around the axis of the power receiving shaft 32 supported on the fixed side of the mission case 19 and the like. The movable frame 33 is provided. A compression roller (or a soil cover roller) is provided at the rear of the movable frame 33.
34 are provided.

The planting device 31 is swingably supported in the vertical direction by a parallel link 36 on a movable frame 33 via a suspension link 35, and a beak tubular planting tube 37 is attached to the tip of the parallel link 36. The planting cylinder 37 is vertically moved by a crank motion of a crank body 38 linked to a middle portion of the parallel link 36, and draws a long elliptical locus vertically in a side view.

Further, the planting cylinder 37 is opened upward, and the soil-planted seedling C is dropped from the seedling supplying device 10 arranged above the planting device 31, whereby the planting device 31 is planted. Soil seedlings C are to be supplied in 37,
After the soil seedling C is supplied, the planting cylinder 37 is connected to the parallel link 36.
When it is moved downward and pierced by the ridge 14, the lower end portion is opened so that the soil-embedded seedling C is planted in the ridge 14.

The seedling supplying device 10 comprises a seedling tray 41 in which a large number of pots 40 in which seedlings C with soil are raised are arranged vertically and horizontally, and a seedling with soil is placed at a predetermined seedling take-out position with respect to the planting device 31. The seedlings C are taken out one by one, and the seedlings C with soil are transferred to above the planting device 31 and then dropped into the planting cylinder 37. The seedling tray 41 is made of resin and has flexibility, and a large number of vertically and horizontally arranged pot portions 40 are provided so as to project to the back. A water draining hole (not shown) is provided at the bottom of the pot portion 40. Are formed. Soil seedlings C are bred in each pot portion 40, and vertical and horizontal gaps are formed between the pot portions 40. Moreover, as the seedling tray 41,
There are several types with different pitches between the pot portions 40, and the seedling feeding device 10 of the present embodiment can accommodate two types of seedling trays 41 with the pitch between the pot portions 40.

As shown in FIGS. 1 to 10, the seedling supplying device 10 has a seedling take-out position for taking out the soil seedlings C from the pot portion 40 of the seedling tray 41 and the soil seedlings C for the planting device 31. The rocking link 51 is provided between the seedling supply position where it is dropped from above.
Is equipped with a claw actuating mechanism 42 that reciprocates the seedling take-out claw 39 by swinging the claws so that the seedlings C with soil are supplied to the planting device 31 one by one from a large number of pots 40. Has become. Further, the seedling feeding device 10 is provided behind the claw actuating mechanism 42 and laterally moves the seedling tray 41 so as to sequentially position a large number of pot portions 40 vertically and horizontally arranged at the seedling take-out position by the claw actuating mechanism 42. And a transport mechanism 43 for transporting in the vertical direction.

The nail actuating mechanism 42 picks up the seedlings C for removal from the pot section 40 by piercing the nails 39 for picking up the seedlings with the tip of the nail after piercing the seedling soil of the seedlings for soil C and picking up the seedlings C for soil. It is configured to be transferred to the supply position while substantially maintaining the tilted posture, and until the soil seedling C is taken out from the pot section 40 at the seedling takeout position and supplied to the planting device 31 (forward stroke). 1 to 6 draws a locus X indicated by a one-dot chain line in FIG. 1 to FIG.
To the pot portion 4 at the seedling take-out position after supplying
The seedling take-out claw 39 is configured to be transferred so that the tip of the seedling take-out claw 39 until it approaches 0 (return stroke) draws a locus Y shown by a dotted line in FIGS. 1 to 6.

The structure of the pawl actuating mechanism 42 of the present embodiment will be described in detail below.
A device frame 44 fixed on the top is provided, and in the device frame 44,
An eccentric wheel 45 is provided which is driven to rotate clockwise in FIGS. 1 to 6 about the support shaft 45a by the rotational power from the PTO shaft 22. The eccentric ring 45 is rotatably supported by a pair of support walls 46 that are provided upright on the device frame 44. A sprocket 47 is fixed to the center of the support shaft 45 a by a winding transmission member 48. PTO shaft 22
The rotational power from is transmitted. Further, eccentric plates 49 are fixed to both ends of the shaft 45a, one eccentric plate 49 is provided with a first eccentric shaft 50a, and the other eccentric plate 49 is provided with a first eccentric shaft 50a. The second eccentric shaft 50b is provided so as to project at a position different from the above in the circumferential direction by a predetermined angle.

Further, in the device frame 44, a base end portion of a long swinging link 51 is provided in front of and below the eccentric ring 45, and a shaft 51 is provided.
It is linked via a. In this swing link 51,
One end of the long connecting link 52 is pivotally connected via a shaft 52a, and the other end of the connecting link 52 is the first of the eccentric ring 45.
Since it is pivotally connected to the eccentric shaft 50a, the swing link 51 is reciprocally swung between the laid posture shown in FIG. 1 and the standing posture shown in FIG. 4 by the rotation of the eccentric wheel 45. The tip of the swinging link 51 in the laid-down posture is designed to lay down on the side away from the transport mechanism 43.

At the tip of the swing link 51, the seedling picking claw 3 is provided.
A holding link 53 for holding 9 is pivotally connected via a shaft 53a, and is attached to the holding link 53 at a position apart from the shaft 53a rearward (toward the transport mechanism 43) by a distance substantially the same as the length of the connecting link 52. Is a long guide link 5 via a shaft 53b.
4 is pivotally connected, and the other end of the guide link 54 is pivotally connected to the second eccentric shaft 50b of the eccentric ring 45. When the swing link 51 falls, the second eccentric shaft 50b is a support shaft. Four
5a (see FIG. 1), the second eccentric shaft 50b is configured to be located below the support shaft 45a (see FIG. 4) when the swing link 51 stands up.

A mounting cylinder 55 is formed in the vicinity of the shaft 53b of the holding link 53, and a rotation support shaft 57 of a long cylindrical claw holder 56 is rotatably mounted on the mounting cylinder 55. Has been. Further, the mounting cylinder portion 55 is provided with a rotation restricting means for restricting the rotation of the claw holder 56 with respect to the holding link 53. In this embodiment, as the rotation restricting means, the rotation support shaft 57 is formed by a cylindrical elastic body 58 such as rubber or spring steel interposed between the mounting cylinder portion 55 and the rotation support shaft 57.
Is configured to be clamped so that a predetermined frictional resistance is generated.

In the pawl operating mechanism 42 of the present embodiment, the eccentric ring 45, the links 51, 52, 53, 54 and the pawl holder 56 are pivotally connected to each other via shafts.
Since a long hole is not formed at this pivotal point, there is little blurring in the operation, and the tip of the seedling take-out claw 39 accurately traces the loci X, Y.
Improves the reliability of exercising along. A straight rod-shaped rod 59 is inserted into and guided by the claw holder 56 so as to be movable in the axial direction, and the rod 59 is capable of retracting toward the seedling tray 41 of the transport mechanism 43. Then, a substantially U-shaped seedling take-out claw 39 that is pierced obliquely into the soil-grown seedling C in the pot portion 40 is attached to the tip of the rod 59.

The flange portion 5 provided at the base end portion of the rod 59
A compression coil spring 6 is provided between 9a and the claw holder 56.
0 is inserted, and the rod 59 is moved in and out (conveyance mechanism 43
It is a biasing means for constantly biasing in a direction away from). A notched concave portion 61 is formed at an axially intermediate portion of the rod 59, and the extending piece 6 provided integrally with the pawl holder 56.
A lock member 63 is pivotally connected to the shaft 2 via a shaft 63a, and a tip end portion of the lock member 63 holds a rod 59 in a projecting attitude from a claw holder 56 toward the transport mechanism 43. In order to do so, it is an engaging portion 63b that engages with the notch recess 61 in a disengageable manner. The lock member 63 is constantly urged in a direction in which the engaging portion 63b engages with the cutout recess 61 by a coil spring 64 fitted onto the shaft 63a.

In addition, the claw actuating mechanism 42 includes a seedling removing claw 39 (claw) so that the claw tip portion of the seedling extracting claw 39 is directed substantially vertically downward above the planting cylinder 37 of the planting device 31 in the forward stroke. The first posture guiding means 65 for forcibly changing the posture of the holding body 56) and the seedling so as to transfer the tip end portion of the seedling take-out nail 39 from below to above along the surface of the seedling tray 41 in the backward stroke. Second attitude guide means 66 for forcibly changing the attitude of the take-out claw 39 (claw holder 56) is provided. These attitude guide means 65 and 66 are each made of a bar member that comes into contact with the outer surface of the pawl holder 56 so as to forcibly rotate the pawl holder 56 with respect to the holding link 53.

Therefore, the average transfer speed of the tip of the seedling take-out pawl 39 in the process of changing the posture of the seedling take-out pawl 39 by the first posture guide means 65 (the process from the state shown in FIG. 6 to the state shown in FIG. 1). Is the transfer speed of the holding link 53 plus the acceleration of the tip of the seedling take-out claw 39 due to the rotation of the seedling holder 56. Therefore, the transfer rate is
The average transfer speed of the tip of the seedling take-out claw 39 (holding link 5) from the seedling take-out position (see FIG. 4) to the position (see FIG. 6) where the posture of the seedling take-out claw 39 is changed by the first posture guiding means 65.
3 is almost equal to the transfer speed of itself).

Further, in the device frame 44, the claw holder 56 abuts the lock member 63 at the position farthest from the transport mechanism 43 (see FIG. 1), and the engagement portion 63b and the notch recess 61 are engaged with each other. An abutment body 67 that swings the lock member 63 in a direction to release the engagement is attached. Further, the base end portion of the pushing arm 68 is pivotally connected to the tip end portion of the extending piece 62. A long hole 69 is formed at the tip of the pushing arm 68, and a pin protruding near the tip of the rod 59 is inserted into and engaged with the long hole 69 to pivotally connect the rod 59 and the pushing arm 68. ing. On the other hand, an extrusion crank 70 that is rotationally driven by the power from the PTO shaft 22 is attached to the device frame 44, and the tip portion of the seedling take-out claw 39 is in the pot section 4 at the seedling take-out position.
When the pushing arm 68 is pushed forward at once by the crank 70 when it is transferred to 0, the rod 59 is projected from the pawl holder 56 against the urging force of the spring 60,
The seedling take-out nail 39 is configured to be pierced into the seedling soil of the soil-bearing seedling C from an oblique direction.

Further, when the seedling take-out claw 39 projects from the claw holder 56 and is retracted by the urging force of the spring 60, the earthed seedling C held by the seedling take-out claw 39 is dropped so as to drop. An extruding member 27 that extrudes the seedling C is attached to the nail holder 56. The extruding member 27 is formed by bending a steel wire, and the seedling take-out claw 39 is inserted through an annular portion formed at the tip portion.

Next, the operation of the pawl actuating mechanism 42 of this embodiment described above will be described. When the soil seedling C is transferred to the seedling supply position (above the planting tube 37 of the planting device 31) by the seedling take-out nail 39 (see FIG. 1), the first posture guide means 65 is used by the nail holder 56. Since the posture has been forcibly changed, the tip of the seedling take-out claw 39 is directed substantially vertically downward. At this position, the lock member 63
Is abutted against the abutting body 67 and swung, the engagement between the engaging portion 63b and the notch recess 61 is released, and the rod 59 and the seedling take-out pawl 39 rapidly retreat upward due to the urging force of the spring 60. To be done. At this time, since the upward movement of the soil-embedded seedling C is restricted by the pushing member 27, the soil-embedded seedling C is detached from the seedling take-out claw 39, and the soil-embedded seedling C is in an appropriate posture (the seedling soil is on the lower side). Dropped into 37.

Then, in order to supply the next soil seedling C to the planting device 31, each link 51, 52, 5 is connected by the eccentric ring 45.
3, 54 are actuated and the seedling take-out claw 39 approaches the seedling tray 41, but until the second posture guiding means 66 acts,
That is, until the bar 66 contacts the claw holder 56 (see FIG. 2), the angle of the seedling take-out claw 39 with respect to the holding link 53 is held by the posture holding means 58, so that the seedlings reach the midway position of the backward stroke. The take-out pawl 39 is transferred with its tip end directed substantially vertically downward.

When the holding link 53 is transferred to the seedling tray 41 side, the second posture guiding means 66 causes the claw holder 56 to move around the rotation support shaft 57 against the frictional resistance of the posture holding means 58. As it rotates, the seedling take-out claws 39 gradually change to a substantially horizontal posture. In this process, since the tip of the seedling take-out nail 39 is transferred from the lower side to the upper side along the surface of the seedling tray 41, the leaves of the soil-grown seedling C in the pot section 40 at the seedling take-out position hang down. Also, the leaf can be lifted by the seedling take-out nail 39, and the leaf of the soil-bearing seedling C can be prevented from being damaged.

When the tip of the seedling take-out claw 39 is located near the edge of the pot 40 (see FIG. 3), the pushing crank 70 strikes the pushing arm 68 and pushes against the urging force of the spring 60. The arm 68 is forcibly pushed toward the seedling tray 41 at a stretch, and the seedling take-out nail 39 is pierced into the seedling soil of the soil-bearing seedling C from an oblique direction. At this time, the bottom portion of the pot portion 40 at the seedling take-out position is supported by the support member 74 described later, the deformation of the seedling tray 41 is prevented, and the seedling pick-up claws 39 can stably take out the seedlings C with soil.

Seedling removal nail 3 stabbed in the seedling soil of soiled seedling C
9 is retracted with respect to the pot part 40 while the claw axis is displaced slightly upward by the claw actuating mechanism 42, and the soil-grown seedling C is picked up from the pot part 40 (see FIG. 5). At this time, the seedling take-out pawl 39 may be moved in parallel, or the seedling take-out pawl 39 may be turned slightly upward around the turning support shaft 57.

The action of the eccentric ring 45 causes the locus X
Since the seedling take-out claw 39 is sufficiently separated from the seedling tray 41 as shown by, the downward swinging is started, so that the root of the earthed seedling C is prevented from being dragged by the seedling tray 41 or the like. The root can be protected. That is, in this embodiment, the eccentric wheel 45 and each of the links 51, 52, 53, 54.
By the action of, the nail when the seedling take-out nail 39 holding the soil-containing seedling C is separated from the seedling take-out position rather than the distance between the tip of the nail when the seedling take-out nail 39 approaches the seedling take-out position and the seedling tray 41. The tip portion and the seedling tray 41 are sufficiently separated from each other so that the intersection of the substantially 8-shaped loci X and Y of the tip portion of the nail is located substantially at the center between the seedling take-out position and the seedling supply position. Therefore, the nail actuating mechanism 42 causes the potted portion 40 of the soil-grown seedling C to reach a position where the root of the soil-grown seedling C does not come into sliding contact with the seedling tray 41 when the soil-grown seedling C is scooped out of the pot portion 40.
It can be said that it has a mechanism to pull it out sufficiently.

Further, when the soil-embedded seedlings C are picked up by the seedling take-out claws 39 in this way, a downward force is applied to the tip of the seedling take-out claws 39, and this force is applied to the rotation support shaft 57.
Although it acts on the pawl holder 56 as a moment to rotate it around, a bar 66 that constitutes the second posture changing means is in contact with the pawl holder 56, and the bar 66 causes the bar 66 to move. Rotation is blocked.

Then, the claw actuating mechanism 42 is used to remove the seedling removing claws 3.
In the process in which 9 is transferred to the seedling supplying position, the first attitude guide means 65 acts, that is, the rod 65 moves to the nail holder 5.
6 (see FIG. 6), the posture holding means 58 holds the angle of the seedling take-out pawl 39 with respect to the holding link 53, so that the seedling take-out pawl 3 is held until the midway position of the forward stroke.
9 is transferred while maintaining the inclined posture (see FIG. 5) at the time of taking out the soil-bearing seedlings C from the pot section 40. In addition, it is preferable that such a tilted posture is a posture in which the seedling take-out nail 39 is brought as close to the horizontal as possible.

When the eccentric ring 45 further rotates from the state shown in FIG. 6, the first posture guide means 65 causes the pawl holder 56 to move.
Rotates against the frictional resistance of the posture holding means 58.
As it rotates around, the tip of the seedling take-out claw 39 is directed substantially vertically downward. In this process, seedling picking nails 3
Since the transfer speed of the tip portion of 9 is accelerated and the seedling take-out claw 39 is rotated around the rotation support shaft 57, the earthed seedling C is easily separated from the seedling take-out claw 39 by the centrifugal force. . In addition, even if the soil-grown seedlings C fall by the time the tip portion of the seedling take-out nail 39 is directed substantially vertically downward, at this time, the seedling take-out nail 39 is above the planting cylinder 37 of the planting device 31. There is no problem because it is located. In addition, the transfer of the seedling take-out nail 39 and the transfer of the planting tube 37 at this time are synchronized, and in the process of changing the posture by the first posture changing means 65, the planting tube 37 is always provided below the seedling take-out nail 39. It is preferable to wait for.

Thereafter, the same operation as described above is repeated.
In addition, the seedling take-out nail 39 that is moved by the nail actuation mechanism 42
The trajectories X and Y are formed in a substantially eight-character shape in a side view, and the trajectory X in the forward stroke and the trajectory Y in the backward stroke intersect at the substantially central portion thereof. Next, the transport mechanism 43 will be described. As shown in FIGS. 8 to 10, a transport frame 71 to which a seedling tray 41 in which a plurality of pot portions 40 are vertically arranged is attached so as to be vertically transportable, and the transport frame. The base frame 72 supports the unit 71 so as to be capable of reciprocating in the lateral direction (left-right direction). In addition, in order to bend the seedling tray 41 in the vertical direction along the vertical feed wheel 77, the transport frame 71 is provided.
A guide member 90 that guides and supports the side edge portion of No. 1 is provided.

A support plate 73 for supporting the bottom of the seedling tray 41 is attached to the transport frame 71 in a front lower inclined shape. At the center of the support plate 73 in the left-right direction, as shown in FIG. 3, a guide wall portion 73a that is engaged with the gap between the pot portions 40 and restricts the movement of the seedling tray 41 in the left-right direction is bent and formed. . The support plate 73 is provided at the pot portion 4 at a position where the seedling C with soil is taken out by the seedling take-out claw 39 of the claw actuating mechanism 42.
It is extended to 0, the tip of this support plate 73,
Seedling tray 4 when the seedling take-out nail 39 is stabbed in the soiled seedling C
The support member 74 supports the bottom of the pot portion 40 at the seedling take-out position so as to prevent the deflection of the pot 1. This support member 7
4 is extended in the left-right direction so as to support the bottoms of all pots 40 in a horizontal row at the seedling take-out position.

A horizontal shaft 75 is rotatably attached to the transfer frame 71 via a bearing 76.
A pair of left and right vertical feed wheels 77 are integrally provided in the. A transport pin 78 that engages with a gap between the pot portions 40 of the seedling tray 41 is detachably attached to the inner surface of the wheel 77 at an appropriate position in the circumferential direction. Can be fed vertically. The transport pins 78 are selectively attached to a plurality of attachment holes (not shown) provided around the peripheral portion of the vertical feed wheel 77, and the pot portions 40 of several seedling trays 41 are attached.
The mounting position can be changed according to the pitch between them.

A drive link 80 is connected to the horizontal shaft 75 of the vertical feed wheel 77 via a one-way clutch 79, and the drive link 80 is moved within a predetermined swing angle range (from the rotation start end position to the rotation end position). By reciprocating up to the position), the wheel 77 intermittently rotates only in one direction (direction in which the seedling tray 41 is fed downward).
A pin 83 is projectingly provided on the tip of the drive link 80.

The drive link 80 is urged by a coil spring 84 fitted onto the horizontal shaft 75 so as to rotate the one-way clutch 79 in the idling direction (b). The drive link 80 by the biasing force of the spring 84
The rotation of the drive link 80 is regulated by the regulation body 81 attached to the transport frame 71, whereby the rotation start end position of the drive link 80 is set.

The restricting body 81 is swingably attached to the carrying frame 71 via a support shaft 81a. The regulation body 81 is formed with two fixing holes 87 arranged side by side in the circumferential direction around the support shaft 81a. One of the fixing holes 87 is selected and fixed to the transport frame 71 by a bolt 88. Has been done. Further, the restricting body 81 is provided with an abutting portion 82 against which the pin 83 of the drive link 80 abuts when the drive link 80 is rotated by the urging force of the spring 84, and the abutting portion 82 has a step shape. The swing range of the pin 83 can be changed by swinging the regulation body 81 and fixing it to the transport frame 71 with the bolt 88.

On the other hand, the base frame 72 is attached to the movable frame 33, and a transverse feed shaft 92 having a traverse groove 91 is attached to the base frame 72 so as to be rotatable.
A gear 95 is attached to the shaft 92, a transmission gear 94 is meshed with the gear 95, and rotational power from the PTO shaft 22 is transmitted to the transmission gear 94 by an appropriate rotational power transmission means. .

The gear 94 and the speed change gear 95 are provided in a gear box 96 that is detachably and replaceably attached to the base frame 72. By exchanging the gear box 96, the eccentric wheel 45 and the lateral feed are provided. By adjusting the rotation speed ratio with the shaft 92, the lateral feed amount of the seedling tray 41 can be synchronized with the operation of the pawl actuating mechanism 42 according to the pitch between the pot portions 40.

A slider 98 having an engaging pin 97 that engages with the traverse groove 91 is externally fitted to the lateral feed shaft 92, and the slider 98 is connected and integrated with the carrying frame 71 via an arm 99. Thus, when the lateral feed shaft 92 is rotationally driven, a lateral feed mechanism that reciprocates the transport frame 71 in the left-right direction via the slider 98 is configured. The slider 98
A bellows-shaped cover 1 that is axially expandable and contractible between the base frame 72 and the base frame 72.
00 is provided to prevent sand or the like from entering the traverse groove 91.

Crank arms 101 are provided on both left and right ends of the lateral feed shaft 92, and a transmission link 102 is rotatably provided on the carrier frame 71 via a lateral shaft 102a.
The transmission link 102 includes an engaging portion 103 that engages with the crank arm 101 when the transport frame 71 moves to the leftmost end or the rightmost end.
2 and the drive link 80 are connected by the connection link 104, and the drive link 80 is resisted against the urging force of the spring 84.
The drive link 80 is configured to intermittently apply a rotational drive force for rotating the one-way clutch 79 in the power transmission direction (a) from the rotation start end position to a predetermined rotation end position.

That is, when the transmission link 102 is swung by the crank arm 101, the rotational driving force is transmitted to the drive link 80 via the connecting link 104, and the drive link 80 is forcibly forced to a certain rotational end position. As it is rotated, the vertical feed wheel 77 causes the pot portion 4 of the seedling tray 41 to move.
It is rotated by 0 pitch. When the crank arm 101 is disengaged from the engaging portion 103 of the transmission link 102, the drive link 80 is returned to the rotation start end position by the urging force of the spring 84, and the transmission link 102 is also returned.
Is also rocked back. At the time of this return, the one-way clutch 79 idles and the vertical feed wheel 77 cannot be rotated.

The longitudinal feed wheel 77 has a plurality of first engaging portions 85 arranged in a row in the circumferential direction at a first central angle, and is provided on the inner peripheral side of the first engaging portions 85. A plurality of second engaging portions 89 are arranged in a row in the circumferential direction at a second central angle different from the first central angle. Both the first engaging portion 85 and the second engaging portion 89 are formed in a round hole shape. Further, the second central angle R2 is set to be larger than the first central angle R1. The restricting body 81 is provided with a detent mechanism 86 that engages with the first engaging portion 85 or the second engaging portion 89 in a disengageable manner to position the vertical feed wheel 77.

The present invention is not limited to the above embodiment, but can be modified in design as appropriate. For example, FIG.
As shown in FIG. 2 and FIG. 13, a pair of left and right holding links 53 are provided and arranged on the left and right of the claw holder 56, and the claw holder 56 is rotated in one direction around the rotation support shaft 57 with respect to one of the holding links 53 ( In FIG. 12, a biasing means 28a for biasing the rotation in the clockwise direction is provided, and the other holding link 5 is provided.
3 is provided with a biasing means 28b for biasing the claw holder 56 to rotate about the rotation support shaft 57 in the other direction (counterclockwise direction in FIG. 12), and the biasing force of these biasing means 28a, 28b. Is configured to hold the claw holder 56 at a predetermined angle with respect to the holding link 53 when an external force does not act on the claw holder 56.
The posture holding means 58 can be configured by 28b.

Further, in the above embodiment, the pawl actuating mechanism 42 is provided in front of the transport mechanism 43 so that the pawl 39 is inclined rearward, but the pawl actuating mechanism 42 is forward of the pawl operating mechanism 42 behind the transport mechanism 43. It may be provided so as to be inclined, and further, the transport mechanism 43 and the pawl actuating mechanism 42 may be arranged on the left and right.

[0050]

As described above, in the seedling feeding device of the transplanter of the present invention, the nail actuating mechanism pierces the seedling take-out nail into the seedling soil of the soil-grown seedling at the seedling take-out position. It is configured such that the soil-grown seedlings are taken out from the pot portion so as to be scooped up and transferred toward the supply position while substantially maintaining the inclined posture at the time of taking out, and the locus of the tip portion of the seedling taking-out claw is Since it intersects at the approximate center of the seedling take-out position and the seedling supply position, it can prevent the roots in the seedling soil from being damaged, and the soil-attached seedlings should be sufficiently pulled out above the pot section before moving toward the seedling supply position. Since it is transferred, it is possible to prevent the roots of soil-grown seedlings from sliding on the seedling tray, and to protect the roots.

[Brief description of drawings]

FIG. 1 is a side view of a seedling supply device when a seedling take-out claw is at a seedling supply position.

FIG. 2 is a side view of the seedling feeding device immediately before the posture change of the seedling take-out nail is started by the second posture changing means.

FIG. 3 is a side view of the seedling supply device immediately before the seedling take-out nail is pierced into the seedling soil of the soil-containing seedling.

FIG. 4 is a side view of the seedling feeding device when the seedling taking-out claw is at the seedling taking-out position.

FIG. 5 is a side view of the seedling supply device when the soil-attached seedlings are extracted from the pot portion.

FIG. 6 is a side view of the seedling feeding device immediately before the posture change of the seedling take-out nail is started by the first posture changing means.

FIG. 7 is a partially sectional front view of the seedling supply device.

FIG. 8 is a side view of the transport mechanism.

FIG. 9 is a part of a developed cross-sectional view of the transport mechanism.

FIG. 10 is a part of a developed cross-sectional view of the transport mechanism.

FIG. 11 is a side view of the transplanter.

FIG. 12 is a side view showing another embodiment of the rotation restricting means of the claw holder with respect to the holding link.

FIG. 13 is a plan view of the same.

[Explanation of symbols]

 10 Seedling Supply Device 31 Planting Device 39 Seedling Extraction Claw 40 Pot Section 41 Seedling Tray 42 Claw Actuating Mechanism

Claims (1)

[Claims] 1. A seedling take-out position for taking out the soil-bearing seedling (C) from the pot section (40) of the seedling tray (41) and a planting device (3).
1) is equipped with a claw actuating mechanism (42) for reciprocally moving the seedling take-out claw (39) between the seedling pick-up claw (39) and the seedling supply position where the seedling with a soil (C) is dropped from above. A seedling supply device of a transplanter that transfers a tip end portion so as to draw a locus having a substantially 8-shape in a side view, wherein the nail actuating mechanism (42) comprises:
At the seedling take-out position, the tip of the nail is pierced into the seedling soil of the soil-bearing seedling (C) and then scooped up to take out the soil-bearing seedling (C) from the pot portion (40) and the inclined posture at the time of taking out is substantially It is configured so as to be transferred toward the supply position while holding, and the locus of the tip of the seedling take-out claw (39) intersects at the approximate center between the seedling take-out position and the seedling supply position. Seedling supply device for transplanters.