JPH08214630A - Seedling transplanter - Google Patents

Abstract

PURPOSE: To obtain the seedling transplanter capable of dropping seedlings pulled out from seedling holders at proper positions on a seedling-carrying belt in an arranged state. CONSTITUTION: In the seedling transplanter provided with seedling holders 32a for holding seedling boxes in depressed seedling-holding parts 32i and subsequently carrying the held seedlings to a prescribed seedling-taking position, and with seedling-pulling tools 33a for receiving seedlings (n) held with the seedling-holding members 32i of the seedling holders 32a moved to the seedling- taking positions, and passing only the seedling holders 32a to pull out the seedlings (n) from the seedling holding members 32i, the seedling-pulling tools 33a are disposed in a state capable of being rotated in the same direction as the moving direction of the seedling holders 32a at the seedling-taking positions.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seedling transplanter for taking out seedlings from each pot of a seedling box in which a large number of pots for storing one seedling are arranged vertically and horizontally and planting them in a field.

[0002]

2. Description of the Related Art Seedlings grown in a flexible seedling box in which a large number of pots for storing one seedling are arranged vertically and horizontally are loaded into a planting section together with the seedling box, and the seedling box is transferred to a predetermined transport route. While transporting along, while inserting the seedling pushing pin into the pot of the seedling box from the hole formed in the bottom of the seedling box, push out the seedlings from the seedling box, and receive the seedlings pushed out seedling holder Moves downward along an arcuate path and conveys the seedlings to a predetermined seedling removal position, and at the seedling removal position where the movement direction of the seedling holder is almost horizontal, the seedling extraction tool moves relatively by moving the seedling holder. It is inserted in the seedling holder of the seedling holder, the seedling is taken out from the seedling holder and taken out onto the seedling feeding belt, and the seedling feeding belt laterally conveys the seedling taken out from the seedling holder, and the seedling planting device. Supplied one by one to the seedling picking position There is a sea urchin configuration seedlings transplanter.

[0003]

Since the seedling holder moves at a high speed, the seedling extractor has a large impact when extracting the seedlings, and the seedlings extracted from the seedling holder are aligned in proper positions on the seedling feeding belt. It did not fall in line with the state, and the planting precision of the seedlings with the seedling planting device was adversely affected. The present invention aims to solve this problem.

[0004]

In order to solve the above problems, the present invention has the following constitution. That is, the seedling transplanter according to the present invention holds a seedling box with a concave seedling holding portion, and a seedling holder that conveys seedlings to a predetermined seedling extraction position,
In a seedling transplanter equipped with a seedling extractor that receives the seedlings held in the seedling holder of the seedling holder that has moved to the seedling removal position and extracts the seedlings from the seedling holder by passing only the seedling holder, The extraction tool is provided so as to be rotatable in the same direction as the moving direction of the seedling holder at the seedling taking-out position.

[0005]

[Operation] Since the seedling extractor is rotatably provided in the same direction as the moving direction of the seedling holder, the impact on the seedling when the seedling is removed from the seedling holder is mitigated, and the seedling extracted from the seedling holder is reduced. Fall in line at the proper position on the seedling feeding belt. As a result, the seedlings are supplied to the seedling picking position of the seedling planting device at an appropriate timing, and good seedlings can be planted.

[0006]

EXAMPLE One example of the present invention will be described below.

In this seedling transplanting machine 1, a planting section 4 for 6-row planting is mounted on a rear side of a riding type traveling vehicle body 2 through a link device 3 so as to be able to move up and down, and in the rear portion of the traveling vehicle body 2. A fertilizer hopper 5a of the side-row fertilizer applicator 5 and a fertilizer feeding device 5b for feeding fertilizer for each row are arranged. This seedling transplanter 1 is for planting rice seedlings in paddy fields, but the present invention is not limited to this and is also applicable to a seedling transplanter for planting vegetable seedlings in a field.

The traveling vehicle body 2 includes a pair of left and right steering front wheels 6.6 that rotate and a pair of left and right rear wheels 7.7 that drive and rotate.
The transmission case 9 is mounted on the front side of the frame 8 and the engine E is mounted on the rear side of the frame 8. The rotational power of the engine E is temporarily transmitted to the hydraulic pump mounted on the upper portion of the transmission case 9 by the belt transmission device 10. Is transmitted to the inside of the mission case 9 by a belt transmission device 11 capable of continuously variable transmission. And mission case 9
The power inside is transmitted to the front wheels 6 and 6 and the rear wheels 7 and 7, and is also transmitted to the planting portion 4 via the transmission shaft 9a, the intermediate gear case 9b, and the transmission shaft 9c. In the figure, 12 is the front wheel 6
A steering wheel for steering 6; 13 is a seat on which the operator sits; and 14 is a step floor when the operator moves on the traveling vehicle body 2.

The link device 3 includes a frame 8 of the traveling vehicle body 2.
The upper link 15a, which is attached to the link base 8a fixed to the rear end of the
15a and lower links 15b and 15b are rotatably attached, and vertical links 15c are connected to the rear ends of these upper and lower links. Then, a connecting shaft 16 ′ integral with the planting transmission case 16 in the center of the planting unit 4 is rotatably coupled to a coupling bearing unit 15c ′ projecting rearward from the lower end of the vertical link 15c, and the The attachment part 4 is mounted so as to be rotatable left and right with respect to the traveling direction. Further, a hydraulic cylinder 17 for driving the link device 3 is provided with its base portion side attached to the frame 8, and its piston rod side is integrally fixed downward from the base portion of the upper links 15a, 15a to the arm 15a. 'Is connected via a spring to the tip. When the hydraulic cylinder 17 expands and contracts, the upper and lower links 15a, 15a, 15b, 15b rotate around the support shaft on the link base 8a side, and the planting section 4 moves up and down. The operation of the hydraulic cylinder 17 is controlled by a hydraulic valve 18 provided in the planting section 4.

Preliminary seedling mounts 20, 20 are provided on the left and right sides of the front part of the traveling vehicle body 2. Further, on the left and right sides of the front part of the traveling vehicle body 2, line-drawing markers 21 and 21 for delineating the course of the traveling vehicle body 2 in the next stroke to the field scene are provided so that they can be switched up and down.

By the way, the seedling box C used in this seedling transplanting machine 1 is a plastic flexible seedling box,
The shape is as shown in FIGS. 19 and 20. That is, the small pots C '... are lined up at right and left and front at predetermined intervals, the openings C'a ... Are connected to each other, and the bottom C'b ... Further, right and left edge portions Ca and Ca along the longitudinal direction of the seedling box C are provided with square holes Cb ... For feeding the seedling box in accordance with the longitudinal intervals of the pots C ′. Into the bottom C'b of each pot C '..., a cut C'to which the seedling push-out pin 31a described later can enter from the bottom side.
c is provided. Cc is a wide space | interval part provided toward the longitudinal direction in the left-right (short direction) center. Each pot C '... is filled with bed soil, sown, covered with soil, and raised. The seedling boxes C thus raised are loaded into the planting section 4 together with the seedling boxes, and one plant is taken out from each pot C ′ ... and planted in the field.

The planting section 4 has a six-row planting structure, and two sets of two seedling box transfer devices 30, 30, 30 are provided, a first seedling take-out device 31, 31, 31, a first seedling transfer device 32. 32.3
2, second seedling extraction device 33, 33, 33, and second seedling transport device 34, 34, 34, seedling planting device 3 provided for each row
5 and so on.

A plurality of seedling boxes C ... Are loaded in each seedling box transporting device 30, and the seedlings are fed from the pots C '... in a horizontal row of the seedling boxes C that have been transported to the seedling pushing position P by the first seedling extracting device 31. n
… Are pushed out all at once. The extruded seedlings n ... Are held by the seedling holder 32a of the first seedling conveying device 32 and are conveyed along a locus that forms an arc in the lower front direction.
At 3, it is dropped onto the second seedling carrier 34. The removed seedlings n ... are laterally divided into left and right halves by the second seedling transfer device 34 into the right and left sides of the seedling collecting section, and the seedlings n ... transported to the seedling collecting section are planted one by one. Attached device 35
・ 35 is taken and planted in the field.

A center float 36 is provided below the planting section 4.
And a pair of left and right side floats 37, 37 are provided. During the planting work, these floats slide while leveling the field scene. Each of these floats 36, 37, 37
Is attached with a grooving device 38 that forms a groove for fertilization in a field scene near the seedling planting position of each row, and a U-shaped fertilization guide 5c with a rear opening in a plan view cross section is attached to the rear side thereof. Is attached, and fertilization hoses 5d ... For transferring the fertilizer fed from the fertilizer feeding device 5b. The center float 36 is also a sensor for detecting irregularities in the field scene, and the spool of the hydraulic valve 18 operates according to the vertical movement of the center float 36. That is, when the center float 36 moves upward, the hydraulic valve 1 moves in the direction in which the hydraulic cylinder 17 is extended.
8 is actuated, and conversely, when the center float 36 moves downward, the hydraulic valve 18 is actuated in the direction of contracting the hydraulic cylinder 17. As a result, the planting unit 4 is controlled so as to maintain a constant height with respect to the field scene.

Three seedling box transport devices 30 are provided in the center and on the left and right. Each seedling box transporting device 30 has upper and lower two-stage seedling box supply units 3 which are provided in a state of being inclined downward to the rear.
0a and 30a and the seedling box conveying path from the two-stage seedling box supplying section are merged and conveyed downward, and further, the main seedling box conveying section 30b that is curved forward in a U-shape upward, and subsequently. And an empty box carrying section 30c extending upward to just below the seedling box feeding sections 30a and 30a, and a plurality of empty seedling boxes C ... discharged from the empty box carrying section 30c are vertically stacked at the exit of the empty box carrying section 30c. An empty box housing frame 30d for housing in the open state is provided. In these seedling box carrying devices 30, the main seedling box carrying section 30b is supported on the upper side of each planted transmission case 16 and the base is further fixed in the U-shape of the main seedling box carrying section 30b. Seedling box feeding section support frame 30e ...
..., empty box transporting section 30c, and empty box housing frame 30d.

Two seedling boxes are placed in series in the upper and lower two-stage seedling box supply portions 30a, 30a with their longitudinal directions facing forward and backward. Sliding rollers 50, 50 ... Are provided at the bottom of the seedling box supply section 30a, 30a, and the seedling box C placed on the seedling box supply section is supported by the sliding roller on the lower surface of the pot C '. It is designed to slide backwards. In addition, seedling box supply shutters 52, 52 for switching between a state in which the seedling box is passed through the main seedling box transport unit 30b and a state in which the seedling box is not passed through are provided at the rear of the seedling box supply units 30a, 30a, respectively. When the shutter is in the passing state, the lower shutter is in a non-passing state, and when the upper shutter is not passing, the lower shutter is in a passing state.

Each of the seedling box carrying devices 30 is provided with seedling box feeding devices 40, 40 for locking the seedling boxes C at the seedling pushing position P and sending the seedling boxes one by one row in a row at an appropriate timing. There is. The seedling box feeding devices 40, 40 are provided on the left and right feeding guide portions 30b 'near the seedling pushing position P of the main seedling box feeding portion 30b, and feed claws 40a, 40a that reciprocate along the seedling feeding path. Locking claws 40b and 40b that engage and disengage in conjunction with it are provided. The feed claw 40a-4
The claw portion 0a enters into the opening provided in the left and right transport guide portions 30b ', and the seed box feeding square holes Cb and Cb are provided in the edge portions Ca and Ca of the seedling box C located in the opening. , The feed claw moves upward, rides over the next square hole Cb ..., engages, and moves downward again, so that the pot C ′ ...
Is configured to be conveyed in horizontal rows.

The operation of the seedling box feeding devices 40, 40 is interlocked with the seedling box feeding drive shaft 40c projecting to the left side of each planting transmission case 16, and the first seedling extracting device 31 pushes out the seedlings. The push-out pin 31a is fed from the bottom of the pot C '... until the next seedling push-out action is started. Further, the feed operation of the feed claws 40a, 40a is a drive plate 40d mounted so as to rotate integrally with the seedling box feed drive shaft 40c of the planted transmission case 16.
And a crank arm 40 that interlocks with the feed claws 40a and 40a
It is connected to e by a rod 40f. Each seedling box carrier 30.3
Crank arms 4 provided on the left and right of 0 and 30, respectively
0e, 40e '... are attached to the respective rotating shafts 40g ... which are supported by penetrating the U-shaped inside of each main seedling box transporting section 30b. Feeding claw 40a
The upward movement of 40a, that is, the operation in the direction opposite to the seedling box feeding direction, is driven by the seedling box feeding cam 45c in the planting operating case 16, and the downward movement of the feeding pawls 40a, 40a, that is, the operation in the seedling box feeding direction, is performed. , So as to be driven by the spring 40h.

The feed claws 40a, 40a and the locking claw 4
In order to prevent the seedling box C from dropping by its own weight when both 0b and 40b are pulled out from the square holes Cb and Cb,
Leaf spring brakes 40i, 40i are provided so as to engage with the square holes Cb, Cb with a relatively weak force from the side opposite to the claws.

Further, each drive plate 40d, 40d, 4
In 0d, seedling box feeding manual levers 41, 41.4, respectively
1 is integrally attached, and the feed drive shaft 40c ...
In addition to driving and rotating the seedling box, the seedling box feeding device 40 can be fed and operated by swinging the seedling box feeding manual lever 41.

The seedling box feeding manual lever 41 and the leaf spring brakes 40i, 40i are connected by a rod 41a,
When the seedling box feeding manual lever 41 is operated in the direction in which the feeding claws 40a, 40a move upward, the braking action of the leaf spring brakes 40i, 40i is loosened. Therefore, the seedling box left in the seedling box transporting device 30 at the end of the work can be easily taken out.

Further, the seedling box feeding manual lever 41 is integrally provided with a lock claw 41b, and the seedling box feeding manual lever 41 is provided with feeding claws 40a-4a more than a normal manual seedling box feeding operation.
0a is moved to the upper direction, the lock claw 41
b is a lock arm 4 provided integrally with the pushing operation shaft 31i
1c, the seedling box feeding manual lever 41 is fixed at its operating position, and the seedling box taking-out operation can be performed by releasing the hand from the seedling box feeding manual lever 41. When the first seedling take-out device 31 operates from this state, the locking claw 41b and the lock arm 41c are disengaged when the seedling pushing-out pins 31a ... .

The first seedling take-out device 31 is loaded in the seedling box carrying device 30 and sequentially sent to the seedling pushing position P.
Is a device for pushing out the seedlings n ... in the pots in horizontal rows of the pots C '... at the seedling pushing position P by the seedling pushing pins 31a. The first seedling take-out device 31 is attached so that the push-out drive shaft 31b projecting to the left side of the planted transmission case 16 rotates integrally with the push-out operation shaft 31f of the push-out operation case 31e via the telescopic rod 31d. Is connected to the operating arm 31g,
The fan-shaped pinion gear 3 is provided so as to rotate integrally with the pushing operation shaft 31f and the pushing operation case 31e.
1h meshes with the rack of the pushing operation shaft 31i that is integrally connected to the seedling pushing pins 31a. Therefore, the pushing operation shaft 31i is slid by the rotation of the pushing drive shaft 31b.

The seedling push-out pins 31a ... Are provided at the same number and pitch with respect to the lateral pots C '... of the seedling box C, and project through the push-out holes 31k ... of the push-out pin guide 31j. Horizontal row of pots C'of seedling box C
Seedling n through the bottom C'b ... of the cut C'c ...
Push out the floor. Projection of this seedling extrusion pin 31a ...
The withdrawal operation is projected when the feeding operation of the seedling box feeding device 40 is completed and the seedling box is locked, and the seedling holder 32a of the first seedling feeding device 32 is located at the seedling pushing position P in the stopped state. The operation is completed, and the retraction is completed before the next movement of the seedling box by the seedling box feeding device is started. Reference numeral 31d 'is a spring case that internally houses the spring 31d ".

The first seedling conveying device 32 ... is a horizontal row of seedlings n pushed out from the seedling box by the first seedling extracting device 31.
Are received by the seedling holders 32a ... at the seedling receiving position (shown by a chain line in FIG. 3) and conveyed to the seedling taking-out position (shown by a solid line in FIG. 3) of the second seedling taking-out apparatus 33.

In this first seedling transfer device 32, drive arms 32c that rotate integrally with a first seedling box drive shaft 32b projecting to the right side of the planted transmission case 16 are provided on both left and right sides of the seedling box transfer device 30. Two upper and lower swing arms 3 provided
2d (U, L) and 32d (U, L) lower swing arms 32d (L) and 32d (L) swing operation arm 32d 'which rotates integrally, is interlockingly connected via a telescopic rod 32e. ing. Swing arm 32d (U,
The ends of L) and 32d (U, L) are pivotally attached to the support plates 32f and 32f that are fixed to the left and right side ends of the seedling holder 32a, and the swing shaft 32h (U, L) is a swing shaft for swing operation. Arm 32d (U, L) 32d
A parallel link is formed by (U, L) and the support plates 32f and 32f.

When the drive arm 32c is driven and rotated, the seedling holder 32a reciprocates along a locus that forms an arc between the seedling receiving position and the seedling removing position. When the swing arm 32d is moved upward by the driving rotation of the drive arm 32c and the seedling holder 32a reaches the seedling receiving position, the lower swing arms 32d (L) and 32d (L) are stopped by the stopper body 32g.
It hits 32g and stops. The drive arms 32c still rotate to try to move the swing arms 32d upward, but the telescopic rod 32e extends (the spring 32e ″ in the spring case 32e ′ of the telescopic rod 32e contracts) and swings. The arms 32d (L) and 32d (L) remain stopped by the stopper bodies 32g and 32g, and thus the swing arms 32d (L) and 32d.
While (L) is in a stopped state by hitting the stopper bodies 32g, 32g, the seedling holder 32a is located at the seedling receiving position, and the seedling n pushed out by the first seedling take-out device 31 ...
To receive. Further, when the seedling holders 32a move upward to the seedling receiving position, the arms 3 integrated with the swing shafts 32h.
2h 'has a spring 32h "attached to its tip
, So that the momentum when the swing arm moves upward is killed, and the impact when the swing arms 32d ... Abut against the stopper bodies 32g.

The first seedling conveying device 32 ...
The seedling holders 32a are stopped at the seedling receiving position before the projecting operation (seedling pushing operation) of the seedlings 1a ... Is started, and when the seedling pushing pins 31a ... Then, the second seedling carrier device 34 ... Received the seedling n ...
When the seedlings n have been transported to the right and left seedling picking positions, the seedlings n.
3 operates so as to be delivered onto the second seedling transport device 34. After that, the seedling holders 32a move up again and return to the seedling receiving position.

The seedling holder 32a has a first seedling removing device 3
Recessed seedling holding portions 32i ... Receiving the seedlings n ... Extruded by 1 are formed in accordance with the lateral positions of the pots C '... of the seedling boxes C transported by the seedling box transporting device 30. And, at the bottom of this seedling hold section 32i ...
A pair of left and right seedling retaining claws 32j, 32j ... Are provided respectively. The seedling retaining claws 32j, 32j ... are rotating shafts 32k, which penetrate the base of the seedling holder 32a in the lateral direction.
32k is integrally attached to the rotary shaft 32 so that the claws project upward from the bottom of the seedling holding portion 32i.
The k and 32k are urged by springs 32l and 32l attached to the left and right outer ends thereof. The shape of the seedling retaining claws 32j, 32j ... has two cutting edges before and after it is hard to insert the seed bed na, and the seedlings are held in the seedling pushing direction of the first seedling extracting device 31 and the seedling extracting direction of the second seedling extracting device 33. The tip is provided so as to face the rear side of the rotation shafts 32k, 32k so that when the seedling moves inside the section, it retracts, and when the seedling moves in the opposite direction, it projects into the seedling holding section.

Incidentally, as shown in FIG. 16, the cutting edge of the seedling retaining hook 32j may be one. In that case, in order to obtain a sufficient seedling retaining effect, the seedling retaining claw 32j
It is recommended to lengthen the entire length of the soybean and increase the amount of biting of the cutting edge into the nursery.

Further, a claw rotating arm 32m which rotates integrally with the rotating shaft is attached to the left and right center sides of the rotating shafts 32k and 32k, and an operating arm 32n is attached to a boss portion of the claw rotating arm.
Is rotatably fitted on the outside, and the rotation of the pawl rotating arm 32m is restricted by stoppers 32n 'and 32n' formed on the operation arm. Operation arm 32n
A roller 32n ″ is rotatably attached to the tip of the
A spring 32o is attached to the lower end to urge the claw rotating arm so that the seedling retaining claws 32j, 32j ... The spring 32o is
The other end is hooked on the connecting pipe 32f 'for connecting the left and right support pipes 32f, 32f, and the connecting pipe 32
It is arranged below the central connecting member 32f ″ that connects the left and right central portions of f ′ and the left and right central portions of the seedling holder 32a. The spring 32o biases the rotating shafts 32k and 32k with the force described above. The spring 32l ... is a rotating shaft 32k, 32k
It is set stronger than the force that urges.

When the seedling holder 32a is located at the seedling receiving position, the roller 32n "hits the upper cam plate 32p attached to the rear center of the left and right center of the main seedling box transporting portion 30b to push down the operating arm 32n, and rotate the nail. Moving arm 32m
Are forcibly rotated so that the seedling retaining claws 32j, 32j ... Rotate in the direction of retracting from the bottom of the seedling holding section 32i. The seedling retaining claws 32j, 32j ... are the operation arms 32n.
Within the range of the stoppers 32n 'and 32n', the state becomes rotatable against the springs 32l ... And the seedlings n ... are pushed into the seedling holder 32a in this state (FIG. 9). Therefore, the seedlings n ... are pushed into the seedling holder 32a while giving some resistance by the seedling retaining claws 32j, 32j ... Energized by the weak springs 32l. It is held in the hold unit 32i.

When the seedling holder 32a moves downward, the roller 32n "is disengaged from the upper cam plate 32p, so that the operation arm 32n becomes free and the strong spring 32 is released.
The bias due to o also acts on the seedling retaining hooks 32j, 32j ... Therefore, while the seedling holder 32a is transporting the seedlings, the two cutting edges before and after the seedling retaining claws 32j, 32j ... bite into the seedling n held in the seedling holding portion 32i ... Is performed (Fig. 1
0).

When the seedling holder 32a is moved to the seedling take-out position, the lower cam plate 32q is hit by the roller 32n "to push down the operation arm 32n, and the claw rotating arm 32 is moved.
m is forcibly rotated and the seedling retaining hooks 32j, 32j ...
Are withdrawn from the bottom of the seedling holding section 32i, so that the seedling retaining claws 32j, 32j ... Do not become a resistance to the seedling withdrawing action of the second seedling removing device 33 (FIG. 11).

The second seedling take-out device 33 is the first seedling transfer device 3
When 3 moves to the seedling take-out position, seedling holder 32a
Is a device for extracting the seedlings n ... Held in the respective seedling holding portions 32i ... With the seedling extractor 33a ... And dropping them onto the seedling feeding belts 34a and 34a of the second seedling conveying device 33.

The seedling removing tool 33a is a seedling removing portion 33b ... Inserted in each seedling holding portion 32i of the seedling holder 32a.
Is a comb-shaped member that projects downward and is arranged in parallel, and is rotatably attached to the rotating arm 33c by the stopper 33d while being positionally regulated, and the lower end side is biased rearward by the torque spring 33e. As a result, the seedling removing portions 33b ... Retain the seedlings n ... Held in the respective seedling holding portions 32i ... Of the seedling holders 32a ... Which have moved to the seedling extraction position, and pass only the seedling holders 32a. Pull out.
At this time, the seedling n ... pushes the seedling removing tool 33a ..., so that the seedling extracting tool 33a ... rotates to the front side against the force of the torque spring 33e.
The impact due to the collision of a ... Is mitigated, the seedlings n ... are not blown backward more than necessary, and the seedlings are dropped to appropriate positions on the seedling feeding belts 34a.

The portion of each seedling removing portion 33b that receives seedlings has a taper shape in which the tip end side is rearward in side view, and both sides thereof are diagonally cut rearward with the left and right central portions as ridge lines. Are doing The seedbed has a truncated cone shape (Φ1> Φ2) having a larger diameter toward the upper side, so that the seedling n is placed in the seedling holding section 3
If the seedlings are extracted horizontally from 2i, the resistance of the seedbed is reduced as the seedlings are extracted, and the seedlings are largely ejected. However, if the seedling removing portion 33b has a shape like this example, the seedling n extracted from the seedling holding portion 32i tilts forward and downward as shown in FIG. 13 (b), so that the upper side surface of the seedbed holds the seedling holding portion. While contacting the upper side wall of the portion 32i to impart resistance to the seedling, the seedling removing portion 33
Since b is embedded in the bottom of the seedbed, the diameter Φ2 of the bottom is widened, and the resistance between the upper side surface of the seedbed and the upper side wall seedling of the seedling holding portion 32i is increased to prevent the seedling from popping out significantly.

The shape of the seedling removing portion 33b is not limited to the above-mentioned shape. For example, when the seedling removing portion receives the seedbed as shown in FIG. 17, it has the effect of expanding the bottom of the seedbed. It is effective in preventing the seedlings from popping out.

Further, since the seedling removing section 33b is designed to pass between the pair of left and right seedling retaining hooks 32j, 32j, the seedling removing section 33b comes out just before the seedling removing section 33b hits the seedling n in the seedling holding section 32i. The seedlings can be held by the stop claws 32j and 32j, and the seedlings can be reliably transported by the seedling holder 32a.

Alternatively, as shown in FIG. 18, the seedling holder 32
By providing the seedling retaining claw 32j integrated in the center of the bottom of the seedling holding portion 32i of a and forming the seedling removing portion 33b into a bifurcated shape, the seedling removing portion 33b and the seedling retaining nail 32j are formed. Interference can be avoided.

The rotating arm 33c is rotatably attached to the rotating shaft 33f, and a pin fixed to the rotating arm 33c is attached to the cam surface of a cam disk 33g attached to the drive shaft 31b so as to rotate integrally therewith. It is biased by a spring 33i so that 33h abuts. Immediately after the seedlings are taken out from the seedling holder 32a, the seedling removing device 33a is moved downward by the cam mechanism, and the extracted seedlings are forcibly dropped onto the seedling feeding belts 34a and 34a of the second seedling conveying device 34. To do. Each seedling removing portion 33b of the seedling extracting tool 33a is formed with a stepped portion 33b 'which presses the upper side of the floor of the extracted seedling.

The second seedling conveying device 34 receives the lateral one-row seedlings n removed by the second seedling removing device 33 on the seedling feeding belts 34a, 34a, ... It is a device which conveys to the seedling taking positions S, S ... of the attached devices 35. The second seedling transporting device 34 connects the drive rollers 34c and 34c to the drive shafts 34b and 34b that project in the rear side of the left and right transmission frame 42 and rotate in opposite directions so that the drive rollers 34c and 34c are integrally rotated. The seedling feeding belts 34a and 34a are wound around the driven rollers 34d and 34d which are rotatably supported by the upper and lower rollers, and the upper surfaces of the left and right seedling feeding belts 34a and 34a operate so as to move to the left and right outside respectively. ing. Further, a plurality of protrusions 34a '... arranged along the rotation axis direction are provided on the outer peripheral surface of the seedling feeding belt 34a, and the seedlings n ...
In the state of being sandwiched between the left and right sides of a ′ ... Seedling feeding belt 34a / 3
The turning operation of 4a conveys the seedlings n ... to the seedling picking position at the timing when the seedling planting devices 35, 35 pick up the seedlings from the seedling picking position S, S one by one.

The seedling planting device 35 ... is a second seedling transport device 34.
It is a device that picks up the seedlings n ... that have been transported to the seedling picking position S ... one by one and plant them in the field. The seedling planting device 35 is equipped with a cam body fixed to the inner side of the planting transmission frames 43, 43 extending rearward from the left and right transmission frames 42 so as not to rotate and having a planting drive shaft on the case side. The rotary case 35b that rotates together with the 35a has two seedling-implanting rods 35c and 35c. The tips of the two seedling-implanting rods 35c, 35c move in a closed loop locus T and alternately plant seedlings in the field.

The seedlings n of the seedling feeding belts 34a, 34a of the second seedling conveying device 34 are dropped into the seedling receiving portions 35d, 35d provided at the seedling picking position S at the end of the belt. The seedling receiving portions 35d, 35d are formed on the upper portions of the plate-shaped planting guides 35e, 35e, 35e, 35e arranged on the left and right, and the guide plate spacing of the planting guides is widened to the left and right to receive the seedlings n ... It is like this. Seedling receiving portion 35d / 35d
The seedlings received by the seedlings are transferred from above to the seedling implantation rod 35.
b ・ 35b received at the tip of the planting guide 35e ・
Move between 35e, seedlings are planted in the field.

Next, the transmission mechanism of the planting section 4 will be described.

Power is input from the transmission case 9 of the traveling vehicle body 2 to the input shaft 42 'provided at the input portion of the left and right transmission case 42 via the transmission shaft 9c and the like. From the input shaft 42 'through the bevel gears 42'a and 42'a, the planted transmission shaft 4
2a, and is transmitted to the transmission mechanism inside the planted transmission case 16 ... And the planted transmission frame 43 ... In the planted transmission case 16 ..., the planted transmission shaft 42a to the gear 42b,
Pushing drive shaft 31 through gear 44a and clutch 45b
transmitted to b. A seedling box feed cam 45c is attached to the push-out drive shaft 31b so as to rotate integrally, and the arm 4 is attached to the cam so as to rotate integrally with the feed drive shaft 40c.
The roller 46a of No. 6 abuts and the feed drive shaft 40c is rotated. Non-uniform speed transmission is performed from the shaft end portion of the push-out drive shaft 31b to the first seedling transfer drive shaft 32b via the non-uniform speed transmission device 47. Further, the bevel gear 42 can be connected to the planted transmission shaft 42a.
The drive shaft 3 of the second seedling transfer device 34 ...
It is transmitted to 4b and 34b. Furthermore, the planted transmission shaft 42a
From the sprocket 42d, the chain 42e, and the sprocket on the side of the planting device to drive the planting drive shaft 35a. 45b '...
It is a clutch actuating pin for turning on and off the clutch 45b.

The transmission case of the planting section is such that three pipe-shaped transmission cases 16 are connected to the rear end portions of the pipe-shaped left and right transmission cases 42, and four planted transmissions are rearward from the left and right transmission cases 42. The frame 43 ... Is extended. Then, one is placed on each of the left and right sides of the two central planted transmission frames 43, 43 and inside the left and right outermost planted transmission frames 43, 43, respectively.
A seedling planting device 35 is provided for each set. A detachable lid 49 is attached to the surface of the outermost planting transmission frame 43 opposite to the seedling planting device 35. The lid 49 is opened to adjust the rotational position of the planting drive shaft 35a. Due to
The operation timing of each part of the planting part 4 can be adjusted.

[0048]

As described above, in the seedling transplanting machine according to the present invention, the seedling extracting device for receiving the seedling held in the seedling holding portion of the seedling holder that has moved to the seedling removing position and extracting the seedling is Since it is installed so that it can rotate in the same direction as the moving direction of the seedling holder at the extraction position, the impact on the seedling when the seedling is removed from the seedling holder is mitigated, and the seedling extracted from the seedling holder is The seedlings were dropped in line at an appropriate position on the feed belt in an aligned state, whereby the seedlings were supplied to the seedling taking position of the seedling planting device at an appropriate timing, and good seedlings could be planted.

[Brief description of drawings]

FIG. 1 is an overall side view of a seedling transplanter.

FIG. 2 is a left side view showing a part of a planting part.

FIG. 3 is a right side view showing a part of the planting part.

FIG. 4 is a rear view showing a part of the planting part.

FIG. 5 is a cross-sectional plan view showing a part of the first seedling extraction device.

FIG. 6 is a partial cross-sectional front view of the seedling holder.

7 is a sectional view taken along line S1-S1 of FIG.

8 is a sectional view taken along line S2-S2 of FIG.

FIG. 9 is a side sectional view showing a seedling holding state of a seedling holder at a seedling receiving position.

FIG. 10 is a side cross-sectional view showing a seedling holding state of the seedling holder during seedling transportation.

FIG. 11 is a side sectional view showing the seedling holding state of the seedling holder at the seedling take-out position.

FIG. 12 is (a) a side view and (b) a partial rear view of the seedling extracting device.

13 (a), (b) and (c) are side views showing the operation of the seedling extracting device.

FIG. 14 is a cross-sectional plan view showing a transmission configuration of a planting part.

FIG. 15 is a cross-sectional plan view of a main part of the outermost planted transmission frame.

FIG. 16 is a view showing another example of the seedling retaining device.

FIG. 17 (a) is a rear view showing another example of a seedling picking section, (b)
It is a bottom view.

FIG. 18 is a front view showing the shapes of a seedling holder and a seedling extracting device according to another embodiment.

FIG. 19 is a plan view of a seedling box.

FIG. 20 is (a) a side view and (b) a front view of a seedling box.

[Explanation of symbols]

 C seedling box 1 seedling transplanter 2 traveling vehicle 3 link device 4 planting section 30 seedling box transport device 31 first seedling removal device 32 first seedling transport device 32a seedling holder 32i seedling hold part 33 second seedling removal device 33a seedling extraction Tool 34 Second seedling carrier 34a Seedling feeding belt 35 Seedling planting device

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideo Iseki, Hideo Iseki, No. 1 Yakura, Tobe-cho, Iyo-gun, Ehime Prefectural Engineering Department, Iseki Agricultural Machinery Co., Ltd. Inside the Technology Department (72) Inventor Satoshi Kato 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. Person Tatsuyuki Torizu No. 1 Yakura, Tobe Town, Iyo-gun, Ehime Prefecture

Claims (1)

[Claims] 1. A seedling holder that holds a seedling box with a concave seedling holding portion and conveys the seedlings to a predetermined seedling removing position, and a seedling holding portion of the seedling holder that has moved to the seedling removing position. In a seedling transplanter equipped with a seedling removing tool that receives the seedling and passes only the seedling holder and extracts the seedling from the seedling holding part, the seedling removing tool can be rotated in the same direction as the moving direction of the seedling holder at the seedling removing position. A seedling transplanter, which is provided in the.