JPH1156024A - Apparatus for taking out seedling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an apparatus for taking out seedlings, capable of enlarging a zone in which several kinds of seedling trays different in the number of pot parts can be used. SOLUTION: In this apparatus for taking out seedlings, in which a pair of seedling taking out lines 76 arranged side by side are installed movably backward and forward based on a seedling tray and the pair of the seedling taking out lines 76 are thrust into a bed soil in a pot part of the seedling tray and moved backward based on the seedling tray so as to take out the bed soil of the seedling from the pot part, a gap between the pair of the seedling taking out tines 76 is adjustable.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for removing seedlings used in a transplanter for planting seedlings such as vegetables in a field while traveling.

[0002]

2. Description of the Related Art Conventionally, as a transplanting machine, at the rear of a traveling body,
A seedling tray feeder for transferring seedling trays having a large number of pots vertically and horizontally, a planting device for planting soilblock seedlings on ridges, and taking out soilblock seedlings one by one from the pot portion of the seedling tray for planting In some cases, a soil block seedling is supported on a ridge while running while supporting a seedling feeding device to be transported to an attachment device.

[0003] The seedling dispensing device is provided with a pair of juxtaposed seedling removal claws that can move forward and backward with respect to the seedling tray.
The pair of seedling removal nails are pierced into the seedling bed soil in the pot portion, and then the seedling removal nails are retracted with respect to the seedling tray, so that the seedling bed soil is removed from the pot portion. The bases of the pair of seedling removal claws are pivotally connected to the claw support so as to be freely rotatable (therefore, the distal ends are close to and away from each other), and are inserted through the guide holes of the nail guides from the distal ends. The spacing between the seedling removal claws is regulated by the guide holes. The nail guide does not move with respect to the seedling extraction nail when the seedling extraction nail is pierced into the soil of the seedling in the pot portion, and the seedling extraction nail is guided by the guide hole. When removing the bed soil of the seedling from the part, the nail guide is retracted integrally with the seedling removal nail.

In the transplanting machine, two types of seedling trays having the same length and width but different numbers of pots are used. Although the size (opening size and volume) will be different, there is only one pair of guide holes of the claw guide,
The distance between the guide holes (and therefore the distance between the seedling removal nails)
Have been formed at intervals corresponding to the two types of pot portions, respectively.

[0005]

In the prior art, since the distance between the guide holes is constant, the third seedling having a pot portion of a size smaller than the size of the two types of pot portions. With respect to the tray, the tip of the seedling removal claw contacted the seedling tray and could not be used for the seedling tray (therefore, there were few types of seedling trays that could be used for the transplanter). . On the other hand, when the interval between the guide holes is formed to a size corresponding to the pot portion of the third seedling tray, the interval between the seedling extraction claws becomes too narrow, and the seedling tray having the largest dimension pot portion is not provided. However, there is a problem that the position where the seedlings pierce the floor soil is too close to the central part, resulting in poor balance.

Accordingly, the present invention has been made in view of the above problems,
It is an object of the present invention to provide a seedling removal device that can take a large usage range of seedling trays of different types with different numbers of pot portions.

[0007]

The technical means taken by the present invention to achieve the above object is to provide a pair of juxtaposed seedling removal claws which can be moved forward and backward with respect to a seedling tray. In the seedling removal device, the removal nail is inserted into the seedling bed soil in the pot portion of the seedling tray and retracted with respect to the seedling tray, so that the seedling bed soil is removed from the pot portion. The distance between the claws is adjustable.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 8, reference numeral 1 denotes a transplanter for transplanting seedlings such as vegetables into a ridge R. The transplanter 1 is a riding type, which is provided with a transplanter 3 behind a traveling body 2 and has a ridge formed in a field. The soil block seedlings are automatically planted at predetermined intervals in the ridges by the transplanting device 3 while running in the longitudinal direction across the R.

An engine, a traveling clutch, a transmission, and the like are provided at a front portion of the traveling body 2. The engine is covered by a bonnet 4, and a steering handle 5 is provided above the bonnet 4. A driver's seat 6 is provided behind 5. Further, the traveling body 2 is provided with a pair of left and right front wheels 7 and a pair of left and right rear wheels 8, the front wheels 7 are steered wheels, and the front wheels 7 and the rear wheels 8 include a traveling clutch and a transmission. Power from the engine is transmitted through the motor, and the engine can be driven to rotate. The engine, the traveling clutch, the transmission, the driver's seat 6, the front wheels 7, the rear wheels 8, and the like are attached to and supported by the body frame 2A. I have.

As shown in FIGS. 9, 10 and 11, a pair of left and right top links 1 are provided at the rear of the body frame 2A.
The mounting bracket 13 is attached to the mounting bracket 13 so as to be able to move up and down freely via a lifting link mechanism 12 mainly composed of a pair of left and right lower links 11. Are mounted via the parallel links 14L and 14R.

An elevating cylinder 1 comprising a hydraulic cylinder is provided between a rear portion of the body frame 2A and the top link 10.
The lifting / lowering link mechanism 12 is vertically swung by the reciprocating operation of the piston rod of the lifting / lowering cylinder 16, and the mounting bracket 13 and the parallel link 14L,
The transplantation frame 15 can be moved up and down via the 14R, whereby the transplantation device 3 can be kept up when traveling on a road or traveling around a headland,
The elevation control of the transplant device 3 can be performed in accordance with the change in the height of the ridge R.

The transplant frame 15 includes a pair of left and right side frame members 15A arranged in the front-rear direction, an intermediate frame member 15M located at the left and right middle of the both side frame members 15A, and It is mainly composed of a front frame member 15B in the left-right direction for connecting the front portions to each other, and a pair of left and right support members 15C provided on the left and right sides of the front frame member 15B so as to protrude upward.

The upper portions of the left and right parallel links 14L and 14R
The left and right parallel link 1 is rotatably supported on the upper part of the mounting bracket 13 around the axis in the front-rear direction via a support shaft 17A.
The lower part of 4L, 14R is the front frame material 15 of the transplant frame 15.
B is rotatably pivoted about a longitudinal axis through a support shaft 17B. An arc-shaped support plate 18 whose lower surface in rear view projects downward is provided below the mounting bracket 13, and a parallel link 14 is provided on the front frame member 15 </ b> B.
In the swing range of L and 14R, a roller 19 that contacts the back surface of the support plate 18 is rotatably provided around a vertical axis, and an engaging member 20 that contacts the front surface of the support plate 18 is provided. Provided. With the above configuration, the transplant frame 15 is supported on the mounting bracket 13 so as to be movable in the left-right direction.

On the other hand, a position adjusting cylinder (not shown) composed of a hydraulic cylinder is interposed between one of the parallel links 14L and 14R and the column member 15C of the transplantation frame 15, and the piston rod of this cylinder extends and retracts. The parallel links 14L and 14R are swung right and left by the operation, so that the transplant frame 15 and the transplant device 3 can be moved in the left and right direction. The position can be corrected to an appropriate position in the left-right direction.

The left and right frame members 15 of the transplant frame 15
A is provided with a detecting means 22 provided with a contact member 22A which comes into contact with a side surface of the ridge R, and the right and left positions of the transplant frame and the transplanting device 3 with respect to the ridge R are properly determined by these left and right detecting means 22. Is detected. The transplanting device 3 includes a seedling tray T on which a large number of soil block seedlings are raised.
And a seedling device 24 for planting seedlings in ridges, and a seedling feeding device for taking out seedlings one by one from a seedling tray T on the seedling mounting 23 and transporting the seedlings to the planting device 24 25, a soil covering member 26 composed of a roller that squeezes and crushes the seedlings near the plant, a seedling feeding frame 27 to which the seedling feeding device 25 is attached, a planting device 24 and a soil covering member 26.
Is mainly composed of a planting frame 28 for attaching
These are provided as a pair of left and right, and in this embodiment,
It is a two-row transplanter 1.

The seedling tray T is made of plastic.
It is thin and flexible, and has a large number of front opening-shaped pot portions P arranged in a grid pattern at predetermined pitches in the vertical and horizontal directions and protruding to the rear surface. Soil block seedlings are grown by supplying, sowing, and raising seedlings. As shown in FIG. 11, the seedling feeding frame 27 projects the side frame members 27B rearward from the left and right ends of the cylindrical tubular portion 27A constituting the front part, and the rear of the left and right side frame members 27B. The ends are connected to each other by a rear frame member 27C to form a rectangular frame. The planting frame 28 is formed by forming a side frame member 28B rearward from both left and right ends of a cylindrical tubular portion 28A constituting a front portion. At the same time, the rear ends of the left and right side frame members 28B are connected to each other by a rear frame member 28C to form a rectangular frame.

As shown in FIGS. 9 and 10, an implanting clutch 30 for connecting and disconnecting power from the engine to each driving portion of the implanting device 3 is mounted on the lower portion of the front frame 15B of the implanting frame 15 in the left-right direction. Have been. This planting clutch 30
Is constituted by an electromagnetic clutch, and can be manually turned on and off by a planting clutch lever (or operating means such as a clutch pedal, a clutch switch, etc.) arranged on the side of the driver's seat 6. The power to the planting device 3 can be cut off at the time of circulating, running on the road, storing, or the like.

The input shaft 30 of the planting clutch 30
a is projected forward, and the input shaft 30a receives the rotational power from the PTO shaft 31 interlocked with the engine of the traveling body 2 through the first transmission shaft 32, the relay shaft 33, and the second transmission shaft 3a.
4 is transmitted. In addition, each of these shafts 30a, 3
1, 32, 33, and 34 are appropriately connected via universal joints, flexible joints, couplings, and the like.

The relay shaft 33 is provided with a bearing 36 at the lower end of a bracket 35 provided at the rear lower portion of the body frame 2A.
, And the second transmission shaft 34 is configured to be extendable and contractible. The relay shaft 33 is provided with a rotation sensor 37 for detecting the number of rotations of the shaft 33. The rotation sensor 3 is provided in a power transmission system between the engine and the planting clutch 30.
7 are provided.

As shown in FIG. 9, FIG. 11 to FIG. 14, behind the planting clutch 30, a gear box 38 fixed to the intermediate frame 15M of the transplant frame 15 is arranged. The output shaft 30b of the planting clutch 30 is connected to a bevel gear transmission mechanism in 38, and power is transmitted from the bevel gear transmission mechanism to a drive main shaft 39 in the left-right direction.

The drive main shaft 39 is supported rotatably around the axis by bearings 40 mounted on the left and right sides of the transplant frame 15 and bearings 41 provided on the side of the gear box 38. The portions other than the portions supported by the bearings 40 and 41 are formed in a hexagonal shaft shape. A transmission cylinder shaft 43 having an inner peripheral surface formed in a hexagonal cylindrical shape and an outer peripheral surface formed in a cylindrical shape is provided on the hexagonal drive main shaft 39.
Are fitted so as to be slidable in the axial direction and to rotate integrally with the drive main shaft 39. A cylindrical portion 28A at the front of the planting frame 28 is rotatably fitted to the outer periphery of the transmission cylinder shaft 43 via a bearing, and the planting frame 28 is axially attached to the drive main shaft 39. (In the left-right direction) and supported so as to be relatively swingable around the axis.

In the above configuration, when the planting frame 28 is moved in the left-right direction, the transmission cylinder shaft 43 is moved together with the frame 25.
Also move integrally. A pair of left and right guide members 45 formed in a cylindrical rod shape is attached and fixed to the front upper part of the drive spindle 39 and to the front part between the intermediate frame member 15M and the left and right frame members 15A of the transplant frame 15. The tubular portions 27A of the pair of left and right seedling feeding frames 27 located above the planting frame 28 are externally fitted to the left and right guide members 45, and the seedling feeding frames 27 move in the left and right direction ( (Sliding) freely supported.

The guide members 45 are inserted into support holes 50 formed in the left and right frame members 15A and the intermediate frame material 15M of the transplant frame 15, and are fixed to left and right outer ends of the left and right guide members 45. The attachment plate 46 is attached by being fixed to the side frame member 15A with bolts 51. A rectangular tubular support member 47 is fixed to the rear end of the transplant frame 15 between the left and right frame members 15A, and has a substantially U-shaped cross section disposed between the left and right support members 47 in the left-right direction. A pair of left and right rollers 49 attached via a bracket to the front and rear halfway portions of the seedling feeding frame 27 are fitted to the rail 48 so as to freely roll in the left and right directions. The rear part of the seedling transfer frame 27 is supported by the transplant frame 15 so as to be movable left and right.

As shown in FIGS. 9 and 16, the rear end of the planting frame 28 is allowed to swing up and down around the drive spindle 39 via a link mechanism 42 at the rear end of the seedling feeding frame 27. The bracket 44 is fixed to the left and right side frame members 28B of the planting frame 28 so as to protrude downward, and the front portion of the soil cover frame 51 is rotatable about the left and right axis around the bracket 44. Attached to.

A pair of left and right earth covering members 26 arranged so as to sandwich the seedling planting portion in the earth covering frame 51 are rotatably mounted and supported, and a locking plate 52 fixed to the rear portion of the earth covering frame 51 is used as a seedling. The planting frame 28 is locked by a locking lever 53 fixed to the rear end of the feeding frame 27, and the planting frame 28 is rolled on the ridge R.
It is supported so as to be able to swing up and down in accordance with the change in height.

The locking position of the locking plate 52 with respect to the locking lever 53 is configured to be freely changeable in the vertical direction. By changing the locking position of the locking plate 52 with respect to the locking lever 53, the locking position can be changed. The vertical spacing between the rear portion of the planting frame 28 and the soil covering member 26 is adjustable, and the planting depth of the seedlings by the planting device 24 is adjustable.

As shown in FIG.
The cylindrical portion 27A of the planting frame 28 is
And a pair of left and right engaging pieces 55 into which the distal end of the linking bracket 54 fits are provided on the cylindrical portion 28A of the planting frame 28. The seedling feeding frame 27 and the planting frame 28 on the side are integrally movable left and right.

On the other hand, when the planting frame 28 swings around the drive main shaft 39, the distal end portion of the linking bracket 54 is movable in the front-rear direction between the pair of engaging pieces 55.
The swinging motion of the planting frame 28 is not prevented. 11, 12, and 1 above the seedling feeding frame 27.
As shown in FIG. 3 and FIG. 15, the right and left seedling mounts 23 are arranged, a support rail 57 having a U-shaped cross section is erected between the upper ends of the left and right support members 15 </ b> C at the front end of the transplant frame 15. A pair of front and rear support rails 58 having a U-shaped cross section are provided between the left and right frame members 15A, and rollers 59 provided at appropriate places on the seedling mounting table 23 side are engaged with these support rails 57, 58. Thus, the seedling mounting table 23 is supported so as to slide smoothly in the left-right direction but not to move in the front-rear direction and the up-down direction.

The left and right seedling placing stands 23 are connected to each other by a connecting rod 60 in the left and right direction, and move integrally in the left and right direction. This connecting rod 60
Has a hexagonal axis at the center and threaded
0L and 60R are formed, and the left end screw portion 60L and the right end screw portion 60R are reversely screwed to each other. Nut members provided on the bottom surfaces of the right and left seedling mounting stands 23 are provided on these screw portions 60L and 60R. 61 are screwed respectively. Therefore, by rotating and driving the connecting rod 60, the interval between the left and right seedling placing stands 23 in the left and right direction can be adjusted.

A sprocket 62 is externally fitted on the hexagonal shaft portion at the center of the connecting rod 60 so as to be relatively movable in the axial direction and to be integrally rotatable. The sprocket 62 is rotatable on the intermediate frame member 15M of the transplant frame 15. It is supported by.
An adjustment drive shaft 63 arranged parallel to the connecting rod 60 is rotatably supported on the transplant frame 15 around the axis. An electric motor 65 is attached to one end of the adjustment drive shaft 63.
Are connected, and the drive shaft 63 can be rotated forward and reverse by the motor 65.

A sprocket 66 is fixed substantially at the center of the drive shaft 63 in the axial direction, and a chain 67 is mounted between the sprocket 66 and the sprocket 62 externally fitted to the connecting rod 60. 63 and the connecting rod 60 rotate synchronously. Also,
On the outer periphery of the drive shaft 63, thread grooves having opposite threads are engraved on the right and left sides from the center of the shaft, and the pitch of the thread grooves is the same as the pitch of the thread grooves formed on the connecting rod 60. It has been done. The upper end of the bracket 54 fixed to the right seedling feeding frame 27 is screwed into the right screw part of the drive shaft 63, and the left seedling feeding frame 27 is screwed into the left screw part of the drive shaft 63. The upper end of the bracket 54 fixed to the bracket is screwed.

Therefore, when the adjusting drive shaft 63 is driven to rotate by the electric motor 65, the left and right seedling feeding frames 27 are moved.
The seedling feeding device 25 moves left and right in the direction of approaching or moving away from each other, and the left and right planting frames 28 and the planting device 24 also move right and left integrally with the seedling feeding device 25. Is transmitted to the connecting rod 60 via the chain 67, so that the seedling feeding device 25
The left and right seedling mounting tables 23 also move left and right by the same amount as the moving amount of the seedling.

Next, the configuration of the implanting device 3 and the power transmission system will be described. Each planting device 24 is shown in FIGS.
As shown in (1), a plant 68 is inserted into the ridge R for planting a seedling, and a swing link mechanism 69 for supporting the plant 68 in a vertically movable manner. The planting body 68 is formed of a cylindrical body 69A having an upper opening and a lower opening, and a beaker-shaped opening device 69B is provided at a lower portion thereof so as to be openable and closable back and forth.

The swing link mechanism 69 is connected to the planting frame 28.
A first parallel link 69B is supported by a bracket 69A fixed to the front and rear swingably, a relay plate 69C, and a second parallel link 69D pivotally mounted on the relay plate 69C so as to be vertically swingable. And the second parallel link 6
A tubular body 69A of the plant 68 is pivotally attached to the rear end of 9D.

A bearing 69E is fixed to the upper link of the second parallel link 69B. The bearing 69E is provided between the crank arm 70A of the crankshaft 70 rotatably supported on the planting frame 28 around the left and right axes. Crank pin 70B
When the crankshaft 70 rotates counterclockwise in FIG. 16, the planted body 68 moves up and down while swinging back and forth, and moves while drawing a substantially elliptical orbit that is long vertically, and rises. When the seedlings are supplied, the seedlings are supplied from the seedling feeding device 25 and descend and enter the ridge R. After the entry, the opening device 68B is opened back and forth by the interlocking tool, and a planting hole is formed in the ridge R. At the same time, the seedlings are dropped and released into the planting holes.

After the release of the seedlings, the soil is crushed by the soil covering member 26 and the crushing of the cultivar is suppressed. A sprocket 71 is provided on the crankshaft 70, and the sprocket 71 and a sprocket 72 integrally formed with the transmission cylinder shaft 43 fitted on the drive main shaft 39 are interlocked and connected via a chain 73. The implant 24 is moved up and down by the rotational power of the drive spindle 39, that is, by the rotational power of the engine.

As shown in FIGS. 11 to 14, the seedling feeding device 25 is disposed on a portion of the seedling feeding frame 27 projecting rearward from the transplantation frame 15, and has a pair of left and right needle-shaped seedling removal claws 76. A nail support 104 attached to and supported by the pair of seedling removal claws 76 to move forward and backward with respect to the seedling tray T; a guide body 105 for guiding the advance and retreat of the nail support 104; Guide 106, a holding member 107 for supporting the nail support 104 and the guide body 105 in a reciprocating manner in the longitudinal direction, respectively, and a nail support 104
And a claw operating mechanism 75 for appropriately operating the guide body 105
And

The claw operating mechanism 75 has a rotating shaft 109 supported by a support frame 108 fixed to the seedling feeding frame 27. A crank 110 and a cam 111 are fixed to the rotating shaft 109. ing. Also, the support frame 10
8, a lower portion of a swing arm 112 is pivotally connected by a swing shaft 113, and a long hole 11 formed in the swing arm 112.
A roller 115 externally fitted to a crank pin 110 A of the crank body 110 is inserted into and engaged with the cylinder 4, and a cylindrical portion 107 of a holding body 107 is pivotally connected to an upper portion of the swing arm 112 via a pin 116. The claw support member 104 made of a pipe is guided through the cylindrical portion 107 so as to be movable in the axial direction.
The nail support 104 can move out of the seedling tray T.

The holder 107 has a bracket 117.
A roller 118 is freely rotatably mounted via a cam groove 12 formed in a guide plate 120.
1, the guide plate 120 is swingably attached via a pin 119 to a fixed support plate 143 above the support frame 108. The guide plate 120 has a rolling roller 120A. The rolling roller 61 is urged by a spring 120B so as to be pressed against the cam body 111, and is guided by rotation of the cam body 111 in a counterclockwise direction. The plate 120 can swing about a pin 119.

On the outer periphery of the claw support 104, a coil spring 66 is interposed between the base 122 provided at the base end thereof and the cylindrical portion 107 of the holder 107 in a compressed manner.
A claw attachment 124 is fitted and fixed to the front end of the claw support 104. A pair of seedling removal nails 76
Are rotatably supported around a vertical axis via a support shaft 125, and the pair of seedling removal claws 76 swings so that the tips move far and near with respect to the claw attachment 124. It is possible.

At the lower end of the holding body 107, an extrusion link 1 is provided.
26 is rotatably connected via a pin 127, and a long groove 128 is formed at the distal end of the push-out link 126, and is engaged with a pin 129 provided on a protruding arm of the claw attachment 124. Also, the extrusion link 126 has the crankpin 110
A cam plate 130 that can be brought into contact with the roller 115 fitted in A
Is provided.

The guide body 105 is formed of a round bar. A claw guide 106 is attached and fixed to the front end, an L-shaped plate-like operating member 131 is attached to the rear end, and a stopper 132 is provided in the middle. A spring 133 is interposed between the stopper 132 and the base 122. Claw guide 106
As shown in FIGS. 1 to 3, a cylindrical portion 134 is fitted around the distal end of the guide body 105 so as to be rotatable around the axis and removably fitted thereto. And a guide plate 135 fitted and fixed. The cylindrical part 134 is
A pair of left and right first guides is fixed on the guide plate 135 by a mounting pin 136 penetrating between the cylindrical portion 134 and the guide body 105 so as not to be rotatable and unremovable with respect to the guide body 105. A hole (guide portion) 137 is formed,
A pair of left and right second guide holes (guide portions) 138 are formed on the lower side, and the seedling removal claws 76 are inserted through the first guide holes 137 or the second guide holes 138, and the left and right seedling removal claws 76 are formed. Is regulated.

In FIG. 1, the seedling removal claw 76 is inserted into the first guide hole 137 to be guided, and the mounting pin 136 is pulled out to move the claw guide 106 to the guide body 105.
After being inverted by 180 ° about the center of the shaft, the mounting pin 136 is again inserted between the cylindrical portion 134 and the guide body 105 to thereby make the second guide hole 138 as shown in FIG.
The seedling removal claw 76 can be inserted through.

The first and second guide holes 137, 13
8, the centers L1 and L2 between the centers of the support shafts 125 are formed smaller than the centers L1 and L2.
Numeral 6 is such that the interval gradually narrows from the base to the tip, and the seedling extraction nail 76 and the nail guide 106
, The distance between the tips of the seedling removal claws 76 is widened and narrowed.

The seedling removal nail 76 is pierced into the soil of the seedling S by the nail support 104 moving forward with respect to the guide body 105 from a position where the tip of the nail is near the guide holes 137 and 138. The seedling S is taken out of the pot P by the nail support 104 and the guide body 105 retreating together with the seedling removal nail 76 piercing the seedling soil of the seedling S. It has become. Therefore, the left and right seedling removal claws 76 are configured such that the distance between the tips becomes narrower as the seedling S pierces the floor soil.

The distance L2 between the centers of the second guide holes 138 is formed smaller than the distance L1 between the centers of the first guide holes 137. By guiding the insertion, the opening size of the pot portion P corresponds to the seedling tray T having a size equal to or larger than a certain size.
The opening size of the pot portion P corresponds to the seedling tray T whose size is equal to or less than the above-mentioned size by guiding the seedling extraction claw 76 through the guide hole 138. Accordingly, the interval between the seedling removal claws 76 can be adjusted (selected).

In this embodiment, the claw guide 106
In this example, two pairs of guide holes with different intervals are formed, but three or more pairs of guide holes with different intervals may be provided. In the present embodiment,
By rotating the guide plate 135, one set of two pairs of guide holes is moved to a predetermined position, but by sliding the guide plate 135 vertically or horizontally, a plurality of guide holes are moved. One of the pair of guide holes may be moved to a predetermined position.

An operating piece 140 is attached to the holding body 107 by the shaft 1.
5 and is urged clockwise in FIG. 5 by a spring. This operating piece 140 is substantially T-shaped having one foot and both left and right arms, and has a lock portion on the left arm. 140A, a release part 140B on the right arm, and a pushing part 140C on the foot. The nail support 10
A lock arm 142 is pivotally supported by the base 122 at the rear end of the lock 4 and is urged clockwise in FIG. 5 by a spring.

Next, the operation of the claw operating mechanism 75 for extracting the seedlings from the seedling extracting claw 76 will be described. In the state of FIG.
Reference numeral 07 denotes a position closest to the seedling tray 2. When the crank body 110 rotates counterclockwise from this state, the roller 115 pushes the cam plate 130, and the pushing link 126 swings about the pin 127. Then, the nail support 104 and the seedling removal nail 76 are advanced toward the floor soil of the seedling S in the pot portion P via the nail attachment 124.

At this time, as shown in FIG.
05 and the claw guide 106, the operating member 131 is the operating piece 14
As the base 122 moves forward, the springs 123 and 133 are compressed, and the engaged portion 142a of the lock arm 142 engages with the engaging portion 107a of the holder 107 and returns. Operation is blocked. Also,
Since the seedling removal claw 76 moves forward with respect to the fixed claw guide 106, the pair of left and right seedling removal claws 76
As a result, the tip of the seedling removal claw 76 is pierced into the floor soil of the seedling S while moving forward and narrowing the distance between the claw tips.

When the crank body 110 rotates after the seedling removal claws 76 pierce the floor of the seedling S, the swing arm 112 is rotated via the crankpin 110A and the roller 115.
Swings to the left, the seedling removal claw 76 and the guide body 105 are both retreated from the seedling tray T, and the floor soil of the seedling S is taken out from the pot portion P. On the other hand, the roller 107 provided on the holding body 107 is guided by the cam groove 121 of the guide plate 120, whereby the seedling removal claw 76 and the guide body 105 are moved from the substantially horizontal removal posture to the substantially downward detaching posture shown in FIG. When the roller 118 moves to the vicinity of the rear end of the cam groove 121, the pushing portion 140C of the operating piece 140 starts to contact the unlocking member 144.

When the operating piece 140 comes into contact with the unlocking member 144 and starts rotating, the lock portion 140A unlocks the operating member 131, and the guide body 105 is resiliently moved by the spring 133 which has been compressed. The seedling S is moved forward toward the tip of the nail against the immovable seedling removal claw 76, extrudes the bed soil of the pierced seedling S, separates it, and drops and supplies it to the plant 68.

On the other hand, the releasing portion 140B of the operating piece 140 pushes up the lock arm 142 to release the engagement between the engaged portion 142a and the engaging portion 107a. Therefore, the claw support 104 held in the protruding state is elastically retracted by the spring 133 in the compressed state. Thereafter, the rotation of the crank body 110 returns to the position shown in FIG. 5, and the above operation is repeated.

As shown in FIG. 14, the power transmission system to the main shaft 74 of each of the right and left seedling feeding devices 25 has a gear 77 integrally formed with the transmission cylinder shaft 43. The gear 27 is meshed with a gear 78 rotatably supported on the front side. A sprocket 79 is integrally formed with the gear 78, and the sprocket 79 and a sprocket 80 rotatably supported on the rear side of the seedling feeding frame 27.
The chain 81 is wound between the two. A sprocket 82 is integrally provided on the sprocket 80 coaxially, and a chain 84 is mounted over the sprocket 82 and a sprocket 83 integrated with the main shaft 74. Thereby, the main shaft 74 is rotated by the rotational power of the driving main shaft 39, and the seedling feeding device 25 can be driven.

As shown in FIG. 9, FIG. 12, FIG. 14, and FIG. 15, each seedling placing stand 23 has a support plate 23A for supporting the bottom of the seedling tray T over a horizontal row of pot portions P. The support plate 23A is attached and fixed between the left and right side plates 23B. The seedling mounting stand 23 stops while the seedlings are removed from the pot portion P by the seedling removal nails 76, and the seedling removal nails 76 supply the seedlings to the planted body 68 after the removal of the seedlings, thereby returning the seedlings to the original position. The feed mechanism 85 is configured to be reciprocated intermittently by the horizontal feed mechanism 85 so as to be fed horizontally in the horizontal direction by one horizontal pitch of the pot portion P before returning. The seedling tray T is removed from the pot P
And a vertical feed mechanism 86 for vertically feeding one vertical pitch in the vertical direction.

The horizontal feed mechanism 85 has a horizontal feed shaft 87 disposed in the left and right directions below the seedling mount 23 in the left-right direction. The inner end (right end) of the lateral feed shaft 87 is rotatably supported via a bearing on a support frame 88 provided on the left seedling feeding frame 27, and the outer end of the lateral feed shaft 87. The (left end) is connected to an output shaft 90a of a transmission gearbox 90 attached to the left seedling feeding frame 27 via a bracket 89.

A sprocket 91 is provided on the input shaft 90b of the gear box 90.
Gear 7 supported on the front side of left seedling feeding frame 27
8 and a sprocket 92 which rotates integrally with the chain 93
, And the transverse feed shaft 87 is rotationally driven by the rotational power of the drive main shaft 39.

A so-called traverse groove 87a having a so-called traverse groove 87a formed substantially over the entire length in the axial direction is used for the lateral feed shaft 87. A sliding member 94 which engages with the groove 87a is fitted to the lateral feed shaft 87 outside. The sliding body 94 is connected to a lower part of the seedling mounting stand 23 on the left side. Left and right seedling rest 2
3 are integrally connected by the connecting rod 60 as described above, so that by rotating the lateral feed shaft 87, the left and right seedling mounting tables 23 can reciprocate in the left and right direction.

The power transmission mechanism of the gear box 90 is different in the number and size of the pot portions P (the pot portions P
The seedling tray 23 is configured to be able to change the lateral feed amount of the seedling mounting table 23 so that a plurality of types of seedling trays T (having different pitches between centers of the seedlings) can be fed laterally. In the lower part between the left and right plates 23A,
Longitudinal feed drive shaft 9 arranged over the right and left seedling mounts 23
6 are disposed in the left-right direction, and a vertical feed driven shaft 97 provided in each of the left and right seedling mounting stands 23 is disposed in the left-right direction above the left and right side plates 23A. A pair of drive sprockets 98 which are arranged on the inner surface side of each of the left and right side plates 23A and are provided in a pair on the respective left and right seedling mounting stands 23 are fixed, and a pair of drive shafts 97 arranged on the inner surfaces of the left and right side plates 23A are mounted on the left and right driven shafts 97. Of the driven sprocket 99 is fixed.

Further, an endless chain 100 is mounted between the driving sprocket 98 and the driven sprocket 99, and the conveying pin which engages with the gap between the vertical pot portions P is mounted on the chain 100. 101 is attached. Accordingly, the rotation of the drive shaft 96 in the direction indicated by the arrow A in FIG.
Can be fed vertically.

The transport pin 101 is connected to the pot P
Are provided at positions matching the pitch between the pot portions P of a plurality of seedling trays T of different numbers, or the mounting position can be changed. The vertical feed drive shaft 96 is configured to be expandable and contractable in accordance with the adjustment of the interval between the left and right seedling mounting stands 23.
Vertical feed cams 102 are fixed to the left and right sides of the horizontal feed shaft 87, and when the seedling mounting table 23 moves to the leftmost end or the rightmost end of the moving range, the vertical feed cams 102 The vertical feed drive shaft 96 rotates in the direction indicated by the arrow A in FIG. 15 by engaging with the follower, and the seedling tray T is fed vertically by one pitch in the vertical direction of the pot portion P.

In the transplanting machine 1, on the left and right sides of the front part of the running body 2, a spare seedling placement table 145 for placing a spare seedling tray T on which seedlings have been grown is provided, and the base side is in the left-right direction. Marker 14 mounted rotatably around the axis of
6 are provided. In the transplanter 1 having the above configuration,
By starting the engine, connecting the planting clutch 30 with the planting clutch lever, and running the traveling body 2 across the ridge R, the seedlings are planted at predetermined intervals in the ridge R while running.

On the other hand, when transplanting to flat ridges, when the seedlings are planted on the streaks next to the already planted streaks, the front wheel 7 is moved along with the rut formed when the already-transplanted streaks are planted, and However, in the transplanter 1 having the above-described configuration, the visibility is obstructed by the traveling body 2 and the spare seedling holder 145, and it is difficult to visually recognize the rut.
By adjusting 46 to the rut, the planting accuracy is ensured.

[0064]

According to the present invention, a pair of juvenile seed picking nails arranged side by side are provided so as to be able to advance and retreat with respect to the seedling tray, and the pair of seedling picking nails are attached to the bed soil of the seedling in the pot portion of the seedling tray. In the seedling removal device in which the seedling bed soil is removed from the pot portion by piercing and retracting the seedling tray, the interval between the pair of seedling removal claws can be adjusted. The interval between the claws can be set to an interval corresponding to the size of the pot portion, so that the range of use of seedling trays of different types with different numbers of pot portions can be widened.

[Brief description of the drawings]

FIG. 1 is a plan view showing a mounting structure of a seedling removal nail.

FIG. 2 is a plan view showing a mounting structure of a seedling removal claw.

FIG. 3 is a front view of a claw guide.

FIG. 4 is a plan view of the seedling delivery device.

FIG. 5 is a right side view of the seedling feeding device.

FIG. 6 is a right side view of the seedling delivery device.

FIG. 7 is a right side view of the seedling feeding device.

FIG. 8 is an overall side view of the transplanter.

FIG. 9 is a side view of an implanting device, an implanting frame, and the like.

FIG. 10 is a side view of a support frame mounting mechanism.

FIG. 11 is a perspective view of a transplant frame, a planting frame, a seedling feeding frame, and the like.

FIG. 12 is a plan view of the implantation device.

FIG. 13 is a plan view showing a support structure of the seedling distribution frame.

FIG. 14 is a schematic diagram showing a power transmission system of the implanting device.

FIG. 15 is a side view of a seedling mounting table and the like.

FIG. 16 is a side view of the planting section.

[Explanation of symbols]

 76 Seedling removal nail T Seedling tray P Pot part S Seedling E Engine

Claims (1)

[Claims] A pair of juxtaposed seedling take-out claws are provided so as to be able to advance and retreat with respect to a seedling tray. A seedling removing device configured to remove the bed soil of the seedling from the pot portion by retreating the seedling, wherein an interval between the pair of seedling removing claws is adjustable.