JPH08214627A - Method and device for taking out seedling in transplanter - Google Patents

Abstract

PURPOSE: To obtain the subject device capable of opening or closing seedling- taking tines each other on an approximately linear locus with respect to a seedling soil, and capable of rapidly and accurately taking out the seedling soil and subsequently releasing the seedling soil through a tine guide without damaging the seedling soil with the seedling-taking tines. CONSTITUTION: A pair of mutually separated seedling-taking tines 4 are thrust into a pot 3 set in a seedling tray 2 and subsequently retreated to take out the seedling soil 5 from the pot 3, and a tine guide 6 fit onto the seedling-taking tines 4 is moved toward the tine tips to release the seedling soil 5 from the seedling-taking tines 4. When the seedling is taken out, a pair of the seedling- taking tines 4 are forward moved into the seedling soil 5 in the pot 3, and simultaneously the distance between the tips of the tines is reduced. When the seedling soil is released, the tine guide 6 is moved toward the tine tips to push out the seedling soil 5 from the seedling-taking tines and simultaneously increase the distance between the tips of the seedling-taking tines with the tine guide 6.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling removing method and device for a transplanter, and is used for transplanting vegetables such as cabbage and lettuce.

[0002]

2. Description of the Related Art A vegetable transplanting machine for growing seedlings in a seedling tray having a pot portion in a vertical and horizontal lattice arrangement, and taking out seedling soil (soiled seedling) from the pot portion and transplanting the seedlings is well known. Is trying to mechanize. As disclosed in Japanese Patent Laid-Open No. 4-330211, this type of vegetable transplanting machine has a pair of seedling take-out nails that are capable of plunging into the seedling soil in the pot section of the seedling tray and the pair of seedlings. A claw support provided at the tip of the picking claws away from each other, a pair of claw guides for guiding the advance and retreat of a pair of seedling picking claws, and a holding body for supporting the claw support and the claw guide in a reciprocating manner, respectively. And a pawl operating mechanism that reciprocates the pawl support and the pawl guide.

Then, the seedling take-out claws are inserted into the seedling soil from the opening side of the pot portion and then withdrawn to take out the seedling soil from the opening of the pot portion, and the taken seedling soil is transferred to a position above the planting device, After setting the nail support and the nail guide in a substantially downward posture corresponding to the planting cylinder, move the nail guide to the tip side of the seedling removing nail, and remove the seedling soil taken out by the seedling removing nail from the seedling removing nail. It is designed to be dropped and supplied to the planting device.

In the seedling take-out device of the transplanter, the nail guide is a pipe fitted and supported by the seedling take-out nail, and the pair of seedling take-out nails and the nail guide are inclined so that they approach each other at the tip side. While the support moves linearly with respect to the seedling pot with the pair of seedling picking nails, the nail guide moves linearly along the seedling picking nails, and the pair of seedling picking nails and the nail guide have nails. It is pivotally supported with respect to the support, and the tip side moves (opens and closes) in a perspective manner. Further, in a side view, the seedling take-out claws push forward on the center line of the seedling when taking out the seedlings.

Therefore, the nail support is linearly moved to pierce the seedling removing nail into the seedling soil, the stabbed seedling extracting nail is closed to sandwich the seedling soil, and the seedling removing soil is taken out by the backward movement of the nail support, After the support and the nail guide are in a substantially downward posture, the tip of the seedling take-out nail is opened, and the nail guide is moved to the tip of the seedling take-out nail to detach the seedling soil from the seedling take-out nail. After that, the nail guide is retracted while moving the nail support to the seedling taking-out position.

[0006]

In the above-mentioned prior art, since the nail support is linearly moved to pierce the seedling extraction nail into the seedling and the seedling extraction nail is closed to sandwich the seedling soil during extraction of the seedling soil,
Although the seedling soil can be prevented from falling during transportation, the seedling pickup nail may damage the seedling soil due to the sandwiching, and since the operation has two stages, it becomes difficult to quickly remove the seedling soil.

[0007] Further, although the seedling can be detached from the seedling take-out nail by the nail guide, a two-step operation of opening the seedling take-out nail and advancing the nail guide is required, which makes it difficult to quickly remove the seedling soil. In addition, since the nail guide is a pipe fitted to each seedling extraction nail, it is pierced into the seedling and it is difficult to push it sufficiently. The present invention solves the problems of the prior art as described above, and quickly and accurately takes out the seedling soil and its leaves without damaging it, and quickly and accurately removes it from the seedling take-out nail and delivers it to the planting device side. It is an object of the present invention to provide a seedling removal method and device for a transplanter that is made possible.

[0008]

A concrete means for solving the problem in the method of the present invention is a pair of seedling take-out nails 4 which are located apart from each other with respect to the pot portion 3 in the seedling tray 2.
Of the seedlings 5 are removed from the pot portion 3 by moving the claw guide 6 fitted to the seedling taking-out claws 4 toward the tip of the claws by rushing in and out of the seedlings taking-out claws 4. A method for transplanting seedlings in a transplanting machine, wherein the pair of seedlings-extracting nails 4 is advanced to the seedling soil 5 in the pot portion 3 while the seedlings are extracted, and the distance L between nail tips is narrowed by the nail guide 6. When the seedling is detached, the nail guide 6 is moved to the tip of the nail to push the seedling soil 5 from the seedling picking nail 4, while the nail guide 6 widens the distance L between the tip of the seedling taking nail 4.

First for solving the problem in the device of the present invention
The specific means of the above is: a pair of seedling take-out nails 4 capable of plunging into the seedling soil 5 of the pot portion 3 in the seedling tray 2; and a nail support 8 pivotally supported at the tip by separating the pair of seedling take-out nails 4 from each other. , A pair of claw guides 6 for guiding the forward / backward movement of the pair of seedling picking claws 4, a holder 9 for reciprocally supporting the claw support 8 and the claw guide 6, and a reciprocating claw support 8 and the claw guide 6, respectively. A seedling take-out device for a transplanter having a claw operating mechanism 10 for moving and moving the seedling take-out claw 4 from a posture facing the pot part 3 to a substantially downward posture facing the planting cylinder 43 of the planting device 35, The nail guide 6 that is moved toward the tip of the nail by the nail operating mechanism 10 when the seedling take-out nail 4 is in a substantially downward posture is a guide portion 1 that guides the pair of seedling take-out nails 4 at the same time.
1 is provided, and the guide portion 11 is formed with an extruding surface that extends between both seedling picking nails 4.

Second for solving the problem in the device of the present invention
In addition to the first specific means, the guide portion 11 of the nail guide 6 guides the pair of seedling take-out nails 4 on the tip side of the pivot portion at a distance shorter than the pivot portion distance K. That is.

[0011]

Operation: A pair of seedling take-out claws 4 located apart from each other are inserted into and withdrawn from the pot section 3 in the seedling tray 2, the seedling soil 5 is taken out from the pot section 3, and the seedling takeout from which the seedling soil 5 is taken out is taken out. After changing the posture of the claws 4 substantially downward, the claw guide 6 fitted to the seedling taking-out claws 4 is moved to the tip side of the claws to separate the seedling soil 5 from the seedling taking-out claws 4.

At the time of taking out the seedlings, the pair of seedling taking-out nails 4 is moved forward with respect to the seedling soil 5 in the pot portion 3, and the nail guides 6 are provided.
The distance L between the tips of the nails is reduced by taking out the seedlings 5 so that the seedlings 5 are not damaged and the seedlings 5 are not pulled out from the seedling taking-out nails 4. When removing the seedlings, the nail guide 6 is moved to the tip side of the nails to push out the seedling soil 5 from the seedling taking-out nails 4 and the distance L between the tip ends of the seedling taking-out nails 4 is widened by the nail guides 6. The tip of the head moves back in the same orbit as when piercing the seedling soil 5.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. 12 to 14 show the whole of the passenger transplanter 21, which is provided with a transplanter 23 at the rear of a passenger traveling vehicle 22 and travels in the longitudinal direction across two ridges. However, seedling soil 5 (soil block seedling) is automatically planted in each ridge at a predetermined interval.

The traveling vehicle 22 is provided with an engine, a fuel tank and the like covered with a bonnet 25, and a control section 26 having a steering wheel, on a front portion of a body frame 24, and
A driver's seat 27 is provided at the rear of the control unit 26, and the main body frame 24 is movably supported by a pair of left and right front wheels 28 and a pair of left and right rear wheels 29. The front wheels 28 are steering wheels, and the rear wheels 29 or the front and rear wheels 2 are used.
Power from the engine can be transmitted to 8 and 29, and a preliminary seedling stand 30 is provided on the left and right sides of the bonnet 25.

The transplanting device 23 is provided on the upper front side of the main frame 33 with a conveying device 34 for intermittently feeding the seedling trays 2 containing a large number of seedlings 5 vertically and horizontally, and at the lower rear of the conveying device 34. The seedling take-out device 1 for taking out the seedlings 5 one by one from the seedling tray 2 and delivering the seedlings 5 to the planting device 35 provided under the main frame 33 is provided, and the covering / squeezing roller 36 is provided under the rear part of the main frame 33. It is mainly composed to prepare.

The seedling tray 2 is made of plastic, is thin and has flexibility, and is provided with a large number of pot portions 3 arranged in a grid pattern at a predetermined pitch in the vertical and horizontal directions. The parts are connected to each other in a planar shape, and a drain hole is formed in the bottom of the pot part 3.
Then, the pot portion 3 is filled with bed soil, and the seed soil 5 is cultivated by sowing and raising the seedling there.

The main frame 33 is supported at the rear portion of the vehicle body frame 24 of the traveling vehicle 22 so as to be able to move up and down through a three-point link mechanism 38 consisting of a top link 38a and a pair of left and right lower links 38b, and the vehicle body frame 24 and the top frame A hydraulic cylinder 39 is provided between the link 38a and the implanting device 23 so that the implanting device 23 can be moved up and down.

The planting device 35 includes a horizontal frame 4 on the main frame 33.
The power transmitted from the PTO shaft of the traveling vehicle 22 through the power transmission means 44, which supports the planting cylinder 43 through the swinging link mechanism 42 on the movable frame 41 which is vertically movably supported through 0. Thus, the planting cylinder 43 can be operated so as to draw a long elliptical locus in the vertical direction. The planting cylinder 43 is provided with an opener that can be opened and closed at the bottom, and the opener opens back and forth when it enters the ridge at the lower end side of the elliptical locus to form a planting hole and the upper end of the locus to the planting hole. The seedling soil 5 supplied by the side can be planted.

The soil covering / squeezing roller 36 is supported by a movable frame 41 via a support arm 46, and height adjusting means 47 is provided between the movable frame 41 and the support arm 46, and a rear end of the support arm 46 is provided. Engages with a long hole 48a of a lifting limit member 48 provided on the main frame 33. The ascending / descending operation of the movable frame 41 can be interlocked with a control valve that operates the hydraulic cylinder 39 via the ascending / descending operation transmission means 49, and the height of the ridge changes significantly, so that the rear end of the support arm 46 moves up and down. When there is a large vertical movement from the approximate center of the elongated hole 48a of the restriction member 48, the height of the transplantation device 23 is adjusted by operating the hydraulic cylinder 39.

As shown in FIGS. 1 to 11 and 14, the seedling take-out device 1 takes out the seedling soils 5 one by one from the pot portion 3 of the seedling tray 2 at a predetermined seedling take-out position with respect to the transport device 34. The seedling 5 is transferred to a position above the planting cylinder 43 of the transfer device 34 and dropped. The seedling taking-out device 1 includes a pair of needle-shaped seedling taking-out nails 4, a nail support 8 provided with the pair of seedling taking-out nails 4 at the tips thereof, and a nail guide 6 for guiding the pair of seedling taking-out nails 4 back and forth. A holder 9 for supporting the claw support 8 and the claw guide 6 so as to be reciprocally movable in the longitudinal direction, and a claw support 8
And a pawl operating mechanism 10 for properly operating the pawl guide 6.

The pawl operating mechanism 10 reciprocates the seedling take-out pawl 4 between the seedling tray 2 and the planting cylinder 43 while changing its posture, and supports the support frame 14 fixed on the main frame 33. This support frame 14 has a PT
A rotary shaft 51 is provided with a crank body 52 that is driven to rotate counterclockwise in FIGS. 1 and 5 by rotational power from the O-axis. A crank pin 53 is provided on the crank body 52 so as to protrude laterally via an arm, and a drive cam 52A is provided coaxially with the crank body 52.

A lower portion of the swing arm 54 is pivotally connected to the support frame 14 below the crank body 52 by a swing shaft 54A, and a middle portion of the swing arm 54 is vertically (arm lengthwise). Direction) is formed, and the crank pin 53 of the crank body 52 is formed in the long hole 55.
The pawl operating mechanism 10 is swung for the swing arm 54 to pick up the seedlings 5 to the transport device 34, and the return stroke time is short, while the seedling device 35 is swung. A quick return mechanism is configured in which the forward stroke time of rocking for supplying the soil 5 is longer.

That is, the pot portion 3 is formed by the seedling take-out nail 4.
In the return stroke Y for taking out the seedlings 5 from the pot, the movement is accelerated, and in the forward stroke X where the seedlings 5 are taken out from the pot section 3 and delivered to the planting cylinder 43, the movement is slow. We are trying to improve the efficiency of seedling extraction and supply while preventing the seedling soil 5 from falling during transfer. The holder 9 is pivotally connected to the upper part of the swing arm 54 via a pin 54B. The holding body 9 is formed in a tubular shape at the portion provided with the pin 54B, and the tubular pawl support body 8 is inserted and guided in the tubular portion so as to be movable in the axial direction. Can be moved toward and away from the seedling tray 2 of the carrier device 34. A pair of seedling take-out nails 4 which are pierced obliquely into the seedling soil 5 in the pot portion 3 are attached to the tip ends of the nail supporters 8.

A roller 57 is attached to the holder 9 via a bracket 56 so that the roller 57 can rotate freely.
Is a cam groove 60 formed in a guide plate 59 that is swingably attached to the upper portion of the support frame 14 via a pin 58.
Is engaged. The guide plate 59 has a rolling roller 61 at the tip of the protruding arm, and the rolling roller 61 is in contact with the drive cam 52A, and the guide plate 59 is pinned by the counterclockwise rotation of the drive cam 52A. It is possible to swing about 58.

The swinging of the guide plate 59 around the pin 58 is such that when the seedling picking-out claw 4 advances toward the pot portion 3,
From the front of the plunge start point (see FIG. 1), the tip of the seedling take-out nail 4 is pin 54B so that the leaves of the seedling soil 5 are scooped from below.
The posture of the holding body 9 (in particular, the relative angle of the holding body 9 with respect to the swing arm 54) is regulated according to the swing angle of the swing arm 54.

That is, when the seedling 5 is pulled out from the pot portion 3 (from the state shown in FIG. 1 to the state shown in FIG. 2), the relative angle of the holding body 9 with respect to the swing arm 54 does not change so much. The front side (right side in FIG. 1) of the cam groove 60 is shaped so as to move the roller 57 around the swing shaft 54A of the swing arm 54. As a result, the seedling extraction nail 4
The seedling 5 is slowly picked up from the pot portion 3 while drawing a locus around the swing shaft 54A of the swing arm 54.

Further, when the seedling soil 5 taken out from the pot portion 3 is transferred to the upper part of the planting cylinder 43 (from the state shown in FIG. 2 to the state shown in FIG. 3), the seedling taking-out claws 4 are largely moved backward. The seedling 5 is moved to the lower side and is changed to a substantially downward position, and the seedling soil 5 is set to a substantially vertical position. Therefore, the rear side (left side in FIG. 2) of the cam groove 60 is shaped to move the roller 57 in a direction away from the swing shaft 54A of the swing arm 54.

As shown in FIGS. 6 to 9, on the outer periphery of the claw support 8, the claw support 8 is retracted between the base body 65 provided at the base end of the claw support 8 and the cylindrical portion of the holding body 9. A coil spring 66 that urges in the direction is interposed, and a claw attachment 67 is fitted and fixed to the front end portion of the claw support 8. The bases of the pair of seedling take-out claws 4 are respectively attached to the shaft 4 on the claw attachment 67.
The seedling take-out nails 4 are pivotally supported as shafts by bending the base portion of the seedling take-out nails 4 at a right angle, and the pair of seedling take-out nails 4 can be swung so that the tips of the seedling take-out nails 4 move relative to the nail fixture 67. It has become.

An extruding link 6 is provided at the lower end of the holding body 9.
8 is rotatably connected via a pin 69. A long hole (or long groove) 70 is formed at the tip of the push-out link 68, and is engaged with a pin 71 provided on the protruding arm of the claw attachment 67. A cam plate 73 is provided on the push-out link 68, and the cam plate 73 can contact the crank pin 53 of the crank body 52. When the swing arm 54 is located at the swing end on the side of the transport device 34 (see FIG. 1), the pushing link 68 is swung by the rotating crank pin 53 via the cam plate 73, and the holder 9 is held. On the other hand, the claw attachment 67 and the claw support 8 are pushed toward the transport device 34 side to compress the coil spring 66. As a result, the seedling take-out claw 4 is projected and the claw support 8 has a restoring force for retracting.

Reference numeral 6 denotes a claw guide which is slidably inserted in the claw support 8, the base body 65 and the claw attachment 67 in the longitudinal direction, and is formed of a round bar or the like, and the guide portion 1 is provided at the front end thereof.
The member forming 1 is attached across both seedling picking nails 4,
The front surface is a pressing surface that contacts the seedling soil 5. An operating member 76 having an L-shaped plate in side view is attached to the rear end of the claw guide 6, a stopper 77 is fixed in the middle thereof, and a spring 78 is fitted between the stopper 77 and the base body 65. .

As shown in FIGS. 8, 9 and 11, the claw guide 6
Are triangularly arranged with respect to the two seedling take-out nails 4, two guide-insertion holes 11a are formed in the guide portion 11, and the intervals between the left and right claw-insertion holes 11a are the pivotal support portions of the left and right take-away nails 4. The distance is set to be narrower than the distance K (the distance between the shafts 4a, which are the pivot portions). Therefore, when the seedling take-out nail 4 and the nail guide 6 move relative to each other, the distance L between the tip ends of the seedling take-out nail 4 changes. That is, when the guide portion 11 is located on the tip side of the seedling taking-out nail 4, the distance L between the nail tips is widest, and if the guide portion 11 is immovable and the seedling taking-out nail 4 is projected from this state, the seedling The base side of the take-out claw 4 approaches the guide portion 11, and the distance L between the claw tips gradually decreases.

Therefore, when the seedlings 5 are taken out from the pot part 3, when they are moved forward, the tips of the left and right seedling picking claws 4 approach each other while sticking out, and are inclined with respect to the centerline S on the left and right sides of the seedlings 5. It will move on a substantially linear orbit. Also, in a state where the seedling soil 5 is taken out by the seedling taking-out nail 4,
When the guide part 11 of the claw guide 6 is moved from the state of being located on the base side of the seedling extracting claw 4 to the tip side, the distance L between the claw tips becomes wide from a narrow state, and in parallel with this, the guide part 11 and the seedling soil 5 are formed. It abuts and pushes out from the seedling pick-up nail 4. At this time, the tip of the seedling take-out claw 4 with respect to the seedling 5 will be removed in the same orbit as the plunging orbit, and damage to the seedling 5 will be minimized during the plunging and the detaching.

Although the claw guide 6 is inserted into the claw support 8 and arranged in a double shaft, the claw guide 6 is separated from the claw support 8 and arranged in parallel vertically or horizontally. Alternatively, it may be arranged between the left and right seedling picking nails 4. In the side view shown in FIG. 6 and the like, the seedling take-out nail 4 is far from the center line S of the seedling soil 5 in the pot portion 3 on the front surface side (opening edge side of the pot portion 3) and on the bottom surface side. Since the seedlings 5 are inclined so as to enter, and therefore the seedlings 5 have a substantially truncated pyramid shape, the two seedling picking nails 4 are pierced from the lower two corners of the surface to the center of the bottom face. Since the leaves and roots are not pierced and the tips of the left and right seedling extracting claws 4 are narrowed, they do not collide with the vicinity of the bottom of the pot portion 3.

6 to 9, an operating piece 81 is pivotally supported by the holding body 9 via a shaft 82 and is urged clockwise by a spring in FIG. 6, and the operating piece 81 is one foot. The left arm has a lock portion 81A, the right arm has a release portion 81B, and the foot has a pushing portion 81C. The operating member 76 fixed to the claw guide 6 has a portion 76A parallel to the claw guide 6,
The slide of this portion 76A is guided by the holding body 9 in a non-rotating state, and the operating piece 8 protruding on the sliding surface thereof.
By engaging with the first lock portion 81A, the movement of the claw guide 6 in the protruding direction is restricted.

A lock arm 83 is pivotally supported on the base body 65 at the rear end of the pawl support body 8.
Is urged clockwise by a spring, and an engaged portion 83a engageable with the engaging portion 9a of the holding body 9 is provided on the front side.
, An inclined surface 83b, and a projection 83c protruding forward are formed. When the claw support 8 is projected, the engaged portion 83a of the lock arm 83 is engaged with the engaging portion 9a of the holding body 9 to maintain the state, and the operating piece 81 is rotated to lock the claw support 8. The lock of the actuating member 76 with respect to the portion 76A by 81A is released, the claw guide 6 projects, and the portion 76A abuts the inclined surface 83b.
Even if the engaged portion 83a is disengaged from the engaging portion 9a, and the disengagement is incomplete, the release portion 81B pushes up the projection 83c by the further rotation of the operating piece 81, and the engaged portion 8a.
3a is forcibly disengaged from the engaging portion 9a.

The pushing portion 81C of the actuating piece 81 is adapted to be rotated by contacting a lock releasing member 84 which is provided on the guide plate 59 and whose position can be adjusted. When it moves to the state of FIG. 3 in which the claw 4 is in a substantially downward posture, it abuts on the lock releasing member 84 to cause the claw guide 6 to project, and then the claw support 8 is retracted together with the claw guide 6. The lock releasing member 84 is formed of a bolt or a pin.

The holder 9, the crank 52, the drive cam 52A, the swing arm 54, the guide plate 59, the pushing link 68, and the like support the claw guide 6, the claw support 8, and the like, and the pot portion 3 of the seedling tray 2. From the seedling picking posture toward the planting cylinder 4
The claw movement mechanism 10 is configured to move while changing the posture to the substantially downwardly facing seedling detachment posture facing 3 and take out the seedling 5 in the seedling removal posture and drop the seedling 5 in the seedling detachment posture. Has been done.

Further, the operating piece 8 having the lock portion 81A
1, the operating member 76, the lock arm 83, and the like, when the claw guide 6 is moved to the claw tip side, the claw support 8 and the claw guide 6
The return interlocking means 12 for simultaneously retracting and is configured, and the operation piece 81 having the releasing portion 81B, the lock arm 83, and the like constitute the return ensuring means 13 for ensuring the return operation of the claw support 8 after the operation of the return interlocking means 12. Has been done.

In FIGS. 3 and 11, reference numeral 15 is a rounded tongue-shaped removal guide body whose upper and lower sides and front sides are open, which is attached to a bracket 87 protruding from the support frame 14 so as to be positionally adjustable, and a planting device 35. Is arranged above the planting cylinder 43. This detachment guide body 15 is used for the seedling picking nail 4.
When it takes a substantially downward (slightly inclined) posture, it surrounds the seedling take-out claw 4 and the claw guide 6, and comes into contact with the seedling soil 5 that is separated from the seedling take-out claw 4 by the claw guide 6 and falls. And hold the seedling soil 5 in a proper posture or correct the improper posture.

The separation guide 15 is made of metal, synthetic resin,
The spring material may be formed into a flat plate shape, a half cup shape, a rod shape, or the like, and a contact surface with the seedling soil 5 is formed into a shape that can guide the seedling soil 5 in an appropriate posture. Next, a seedling taking-out operation of the seedling taking-out nail 4 by the nail operating mechanism 10 will be described. In the state of FIGS. 1 and 8, the holding body 9 is at the position closest to the seedling tray 2, and when the crank pin 53 rotates in the central arc portion of the elongated hole 55 of the swing arm 54 from this state, the pushing link 68 is swung about the pin 69, and the nail support 8 and the seedling picking nail 4 are moved to the pot portion 3 via the nail attaching tool 67.
Move it toward the seedling 5 inside.

At this time, as shown in FIG. 6, the claw guide 6
Is immovable because the operating member 76 is in contact with the operating piece 81, and the base body 65 advances, so that the spring 66,
78 is compressed, the engaged portion 83a of the lock arm 83 engages with the engaging portion 9a of the holding body 9, and the return operation is blocked. Further, since the seedling take-out claws 4 move forward with respect to the immovable guide part 11, the pair of left and right seedling take-out claws 4 are restricted by the claw insertion holes 11a of the guide part 11 which are narrower than the interval K between the pivot parts, and the seedling take-out claws 4 are cut. Pierces the seedling 5 while advancing the tip of the and while narrowing the distance L between the tips of the nails. In a side view, the piercing direction of the seedling take-out nail 4 is inclined with respect to the center line S of the seedling soil 5,
It does not penetrate the stems and roots of seedlings.

In this stuck state, the left and right seedling take-out nails 4
Shows a wide V from the two-dot chain line state in FIG. 9 to the solid line state.
It changes from a letter shape to a narrow V shape. The V-shaped state of the seedling take-out claw 4 is such that the seedling soil 5 is less likely to come off than in the case of being parallel and can be strongly taken out from the pot part 3, and the seedling soil 5 is not pinched at the time of change. So 5 seedlings
Will not be damaged.

At this time, the bottom of the pot portion 3 at the seedling take-out position is supported by the backing member 89, and the seedling tray 2
The deformation of the seedlings is prevented, and the stable extraction of the seedling soil 5 by the seedling extraction nails 4 is guaranteed. When the crank body 52 rotates after completion of the stab of the seedling soil 5 by the seedling take-out claw 4, the swing arm 54 swings leftward via the crank pin 53,
The seedling take-out nail 4 and the nail guide 6 are both separated from the seedling tray 2 and moved on the forward movement path X through the state of FIG.

When the holder 9 is moved along the forward trajectory X, the rollers 57 provided on the holder 9 are guided by the cam grooves 60 of the guide plate 59, whereby the seedling take-out claws 4 and the claw guides 6 are in a substantially horizontal take-out posture. When the roller 57 moves to the vicinity of the rear end of the cam groove 60 when the roller 57 is changed to a substantially downward disengagement posture shown in FIG. 3, the pushing portion 81C of the operating piece 81 is unlocked by the unlocking member 8.
Start contacting 4.

When the operating piece 81 comes into contact with the lock releasing member 84 and starts rotating (the operation of the return interlocking means 12), the lock portion 81A releases the lock of the operating member 76, and the claw guide 6 is compressed until then. 3 is elastically projected by the spring 78, and as shown in the chain double-dashed line in FIG. 3 and in FIG. 7, it moves forward to the nail tip side with respect to the stationary seedling take-out nail 4 and pushes out the stabbed seedling soil 5. And let go.

At this time, the pressing surface of the front surface of the guide portion 11 of the claw guide 6 is brought into contact with a large area so as not to damage the seedling 5, and the detached seedling 5 is removed by the detachment guide body 15.
Is guided to the proper posture, and the planting device 35
It drops toward the planting cylinder 43 and is delivered. When the pawl guide 6 is projected, the unlocked actuating member 76 moves integrally, and as shown in FIG.
Contacts the inclined surface 83b of the lock arm 83 to release the engagement between the engaged portion 83a and the engaging portion 9a. Therefore, the claw support 8 held in the protruding state is elastically retracted by the spring 66 in the compressed state.

At this time, the operating member 7 at the rear end of the claw guide 6
Since 6 is in contact with the back surface of the base body 65 via the cushion 88, the claw guide 6 is also retracted as the claw support 8 is retracted, and both are quickly retracted by the spring 66, so that the falling seedling soil 5 is prevented. Contact of the claw guide 6 with the leaves is avoided as much as possible. If the portion 76A cannot lift the inclined surface 83b of the lock arm 83 due to some reason such as the movement resistance of the claw guide 6 being too large, when the roller 57 moves to the rear end of the cam groove 60, the lock is generated. Release member 84
The operating piece 81 is further rotated by this, and the lock arm 83 is rotated via the projection 83c at the releasing portion 81B (ensuring means 1
3), the engaged portion 83a is forcibly disengaged from the engaging portion 9a, and the backward movement of the seedling take-out claw 4 is ensured. As a result, even if the seedling soil 5 on the seedling taking-out nail 4 cannot be removed by the nail guide 6, the seedling taking-out nail 4 is retracted so that the seedling soil 5 hits the nail guide 6 and is removed.

Then, as shown in FIG. 4, both the seedling take-out claw 4 and the claw guide 6 are returned to the retracted position, and the operating member 76 is locked. When the crank body 52 is rotated from this state, the swing arm 54 is swung to the right, and the holding body 9 is moved to the state shown in FIG. To go back fast. In the movement on the backward movement locus Y, the protrusion of the drive cam 52A acts on the roller 61 of the guide plate 59 from before the seedling take-out claw 4 and the claw guide 6 approach the seedling tray 2, and abruptly changes from the downward posture. Changed to a horizontal posture, so that the seedlings 5 advance to the plunge start position so as to scoop up the leaves of the seedlings 5 or to scoop them under the leaves, so that there are no leaves on the projecting track of the seedling ejection claw 4. To do.

It should be noted that, in FIGS. 1 to 4, the seedling take-out nail 4 is attached to the seedling soil 5.
From the time of piercing the seedling to the time of dropping the seedling soil 5 above the planting cylinder 37, the locus X of the tip of the seedling take-out nail 4 in the seedling take-out process (forward stroke) is indicated by a one-dot chain line, and the seedling is taken out during the backward stroke. The locus Y of the tip of the claw 4 is shown by a two-dot chain line. Transport device 34
As shown in FIGS. 5 and 12 to 14, the movable frame 92 is arranged at the rear of the driver's seat 27 and is supported by the support frame 91 fixed to the main frame 33 in the left-right direction via guide rails or the like. Is equipped with.

The movable frame 92 is arranged forwardly, and the seedling tray 2 is loaded from the upper side of the movable frame 92 along the rear surface of the movable frame so that the opening of the pot portion 3 faces upward and rearward.
The lateral movement of the movable frame 92 laterally feeds it,
It is configured to be vertically fed in the movable frame 92. It should be noted that the movable frame 92 has two seedling trays 2 arranged vertically.
Can be loaded.

The movable frame 92 is provided with a support plate 93 for supporting and guiding the bottom portion of the seedling tray 2 (that is, the bottom portion of the pot portion 3) across the pot portions 3 arranged in a row. The support plate 93 is extended to the pot portion 3 at a position where the seedling extraction nail 4 takes out the seedling soil 5, and the tip of the support plate 93 pierces the seedling extraction nail 4 into the seedling soil 5. It serves as a backing member 89 for preventing the seedling tray 2 from flexing when it is struck and for stably taking out the seedling soil 5 by the seedling taking-out nail 4.

A lateral feed shaft 102 having an endless spiral groove is rotatably supported on the support frame 91,
Power from the seedling take-out device 1 side can be transmitted to the lateral feed shaft 102, and a lateral feed mechanism 103 for laterally feeding the movable frame 92 is provided between the lateral feed shaft 102 and the movable frame 92. The horizontal feed mechanism 103 enables the movable frame 92 to reciprocate horizontally in the left-right direction over substantially the entire width of the seedling tray 2.

A horizontal shaft 94 is rotatably attached to the lower part of the movable frame 92, and a pair of left and right vertical feed wheels 95 are provided on the horizontal shaft 94 via a one-way clutch. A chain 97 is hooked over the driven wheel 96 provided on the upper part of the movable frame 92, and a transport pin 98 that engages with a gap between the pot portions 3 in the vertical direction is attached to the chain 97. .

Between the horizontal feed shaft 102 and the horizontal shaft 94, when the laterally fed movable frame 92 reaches the end of its horizontal movement, it corresponds to one pot pitch between the seedling trays 2. Intermittent feed means 99 for intermittently moving the chain 97 through the vertical feed wheel 95 by a distance is provided, and the vertical feed wheel 95, the chain 97, the transport pin 98, the intermittent feed means 99 and the like feed the seedling tray 2 laterally. An intermittent vertical feed mechanism 100 that vertically feeds one pitch later is configured.

The present invention is not limited to the above embodiment, but can be variously modified. Seedling extractor 1
The method and device for opening and closing the distance L between the nail tips with the nail guide 6 can also be applied to the configuration of the prior art, and the seedling take-out nail 4 and the nail guide 6 after the seedling soil 5 is taken out are further horizontally moved backward. If configured to do so, a belt conveyor may be arranged below the seedling take-out claw 4, and the seedling soil 5 may be placed on this belt conveyor and conveyed to the planting device 35.

The transplanting device 23 of the transplanting machine 21 is a riding type mounted on a traveling vehicle, but it may be a self-propelled walking type or a multi-row planting of two or more rows in addition to one row planting. You can

[0057]

According to the present invention described in detail above, while the pair of seedling take-out nails 4 is advanced with respect to the seedling soil 5 in the pot portion 3 at the time of taking out the seedlings, the distance L between the nail tips is set by the nail guide 6. When the seedlings are removed, the nail guide 6 is moved to the tip side of the nails to push out the seedling soil 5 from the seedling take-out nails 4 while the seedlings are taken out from the seedlings.
Since the distance L between the nail tips is expanded, the seedling take-out nail 4 can be opened and closed with respect to the seedling soil 5 in a substantially straight line trajectory, and the seedling take-out nail 4 can quickly and accurately take out the seedling soil 5 without damaging the seedling soil 5. It can be detached via the claw guide 6.

The nail guide 6 which is moved to the nail tip side by the nail operating mechanism 10 when the seedling take-out nail 4 is in a substantially downward posture has a guide portion 11 for guiding the pair of seedling take-out nails 4 at the same time. Since the guide portion 11 is formed with the extruding surface extending between the two seedling take-out nails 4, the seedling soil 5 can be delivered from the pot portion 3 to the planting cylinder 43 quickly and reliably without damage. .

Since the guide portion 11 of the nail guide 6 guides the pair of seedling take-out nails 4 on the tip side of the pivotal portion at a distance shorter than the pivotal portion spacing K, the guide portion 11 is pivotally supported by the guide portion 11. It is possible to remove the seedling soil 5 without damaging the seedling soil 5 with a simple configuration provided.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view immediately before taking out seedlings showing an embodiment of the present invention.

FIG. 2 is a sectional side view immediately after taking out the seedlings.

FIG. 3 is a sectional side view immediately before leaving the seedling.

FIG. 4 is a cross-sectional side view immediately after the seedling is detached.

FIG. 5 is a side view showing a relationship between a seedling take-out device and a carrying device.

FIG. 6 is a cross-sectional side view of the main part of the seedling take-out device when the seedling is pierced.

FIG. 7 is a cross-sectional side view of the main part of the seedling take-out device when the seedling is removed.

FIG. 8 is a sectional side view of a main part of the seedling take-out device before the seedling is pierced.

FIG. 9 is a cross-sectional plan view of the main part of the seedling take-out device when the seedling is pierced.

FIG. 10 is a rear view of the main part of the seedling take-out device.

FIG. 11 is a perspective view of a separation guide body.

FIG. 12 is an overall side view of the transplanter.

FIG. 13 is an overall plan view of the transplanter.

FIG. 14 is an overall side view of the implanting device.

[Explanation of symbols]

 1 Seedling take-out device 2 Seedling tray 3 Pot part 4 Seedling take-out claw 5 Seedling soil 6 Claw guide 8 Claw support 9 Holding body 10 Claw operating mechanism 11 Guide part 12 Return interlocking means 13 Guarantee means 14 Support frame 15 Release guide 21 Transplant Machine 34 Transporting device 35 Planting device 43 Planting tube L Distance between claw tips K Distance between pivotal supports X Forward stroke Y Return stroke S Soil seedling center line

Claims (3)

[Claims] 1. A pot section (3) in a seedling tray (2).
With respect to the pair of seedling picking nails (4) located apart from each other
The seedlings (5) from the pot part (3) by rushing in and out of the pots, and moving the nail guide (6) fitted to the seedling taking-out nails (4) to the tip side of the nails to take out the seedling taking-out nails. A method of removing seedlings from a transplanter for removing seedlings (5) from (4), wherein a pair of seedling removing claws (4) are provided at the pot portion (3) when the seedlings are removed.
While advancing with respect to the seedling soil (5) inside, the nail guide (6) narrows the distance (L) between the nail tips, and when the seedling is removed, the nail guide (6) is moved to the nail tip side to take out the seedlings. A method for removing seedlings from a transplanter, characterized in that the distance (L) between the tip ends of the nails (4) for extracting seedlings is expanded by a nail guide (6) while pushing out the seedlings (5) from the nails (4). 2. The pot section (3) in the seedling tray (2)
Pair of seedling take-out claws (4) capable of plunging into the seedling soil (5), a pair of seedling take-out claws (4) separated from each other, and a nail support (8) pivotally supported at the tip, and a pair of seedling take-out A claw guide (6) for guiding the forward and backward movement of the claw (4), and a holding body (9) for reciprocally supporting the claw support (8) and the claw guide (6), respectively.
And the nail support (8) and the nail guide (6) are reciprocally moved, and the seedling picking nail (4) is turned from the posture facing the pot part (3) to the planting cylinder (43) of the planting device (35). A seedling take-out device of a transplanter, which has a claw operating mechanism (10) for moving to a substantially downward facing position, and is provided by the claw operating mechanism (10) when the seedling taking claw (4) is in a substantially downward facing posture. The nail guide (6) which is moved to the tip side of the nail has a guide portion (11) for simultaneously guiding the pair of seedling taking nails (4), and the guide portion (11) has a space between both seedling taking nails (4). A seedling take-out device for a transplanter, which is characterized in that it has an extruded surface that extends across it. 3. A guide portion (11) of the claw guide (6).
3. The seedling taking-out device for a transplanter according to claim 2, wherein the pair of seedling taking-out claws (4) guides the pair of seedling taking-out claws (4) on the tip side of the pivotal portion at intervals shorter than the pivotal portion spacing (K).