JP2000209911A - Seedling transplanting machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify the transmission mechanism in a seedling-transplanting machine by providing a plurality of the rows of the routes for conveying seedling trays including seedlings to be planted, arranged in parallel on both right and left sides as well as seedlings-picking up units for picking up seedlings from the trays conveyed on the routes and a seedling-planting units for planting the seedlings picked up by the picking-up units so that these two units may correspond to each of the tray-conveying routes, respectively. SOLUTION: This seedling-planting machine is equipped with the first transverse transmission shaft 65 for transmitting the driving power to individual seedling-picking up units 33 and with the second transverse transmission shaft 133 transmitting the driving power to individual seedling-planting units 31. The power from the driving power source is transmitted to one of the first transmission shaft 65 and the second transmission shaft 133, while the transmission, for example, from one shaft 133 to the other shaft 65 can be made via the transmitter 142 arranged in the intermediate position between the tray- conveying routes adjacent to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a planting section in a multi-row seedling transplanter for taking out seedlings from each pot of a seedling tray in which a large number of pots for accommodating one plant at a time are arranged vertically and horizontally and planting them in a field. Transmission configuration.

[0002]

2. Description of the Related Art As a seedling transplanter for potted seedlings, a seedling tray is transported along a substantially U-shaped seedling tray transport path provided in a side-by-side arrangement, and the seedling tray being transported is moved from the seedling tray being transported. Seedlings are extruded rearward by a seedling removal device provided on the inside of the U-shape of the transport path, and the extracted seedlings are planted in a field by a seedling planting device provided on the lower rear side of the seedling tray transport path. There is one configured. Conventionally, a transmission system of a planting part in a seedling transplanter of this type transmits power from a driving source to a left-right transmission shaft arranged below each seedling tray transport path, and from the transmission shaft, each seedling removal device and a seedling. Each was individually transmitted to the planting device. Actually, devices other than the seedling removal device are provided inside the U-shaped portion of the seedling tray transport path, and these devices are also individually transmitted from the transmission shaft.

[0003]

For this reason, the above-mentioned conventional seedling transplanter is arranged such that the seedlings located on the inner side of the U-shape of the seedling tray transport path from the left and right transmission shafts arranged below each seedling tray transport path. The number of transmission units in the direction intersecting the transmission shaft for transmitting to the take-out device and other devices exists as many as the number of the devices, and the transmission mechanism of the planting unit is complicated. In order to simplify the transmission mechanism of the planting section, the present applicant has disclosed in Japanese Patent Application No. 10-219790 “a first left-right transmission shaft that transmits to each seedling removal device, A second transmission shaft in the left-right direction that transmits power to the first transmission shaft or the second transmission shaft, and the left and right ends of the other transmission shaft from the left and right ends of the transmission shaft. To transmit power to the section ". However, since the configuration of this proposal is a configuration in which power is transmitted from the left and right ends of the first transmission shaft or the second transmission shaft to the left and right ends of the other transmission shaft, the seedling transplanter having a large number of planting streaks is used. In this case, there is another problem in that the operation phase of the upper transmission device and the lower transmission device of the transmission shaft tend to shift due to the deflection of the first transmission shaft and the second transmission shaft.

[0004]

In order to solve the above problems, the present invention has the following arrangement. That is, the seedling transplanter according to the present invention, while providing a plurality of rows of right and left seedling tray transport path for transporting the seedling tray containing seedlings,
A seedling removal device for taking out seedlings from the seedling tray being transported through the seedling tray transport path, and a seedling planting device for planting the seedlings removed by the seedling removal device in a field are provided corresponding to each seedling tray transport path. In the seedling transplanter, a first transmission shaft in the left and right direction to be transmitted to each of the seedling removal devices, and a second transmission shaft in the left and right direction to be transmitted to each of the planting devices are provided, and the first transmission shaft or the second transmission shaft is provided. The power from the drive source is transmitted to one of the two transmission shafts, and the transmission from the one transmission shaft to the other transmission shaft is performed via a transmission portion arranged at an intermediate portion between two adjacent seedling tray transport paths. It is characterized by having such a configuration.

More specifically, it is preferable that two adjacent seedling removal devices (or seedling planting devices) be transmitted by a common first transmission shaft (or second transmission shaft). If compared to conventional seedling transplanters,
The number of transmission parts in the direction intersecting with the transmission shaft can be reduced to half.
Further, with the above configuration, compared to the configuration of the proposal,
Even in a seedling transplanter having a large number of planting streaks, it is possible to eliminate the shift of the operation phase of each device due to the deflection of the first transmission shaft and the second transmission shaft.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment shown in the drawings will be described. In the seedling transplanter 1, an eight-row planting portion 4 is attached to the rear side of the riding traveling vehicle body 2 via a link device 3 so as to be able to move up and down. 5 and a fertilizer feeding device 5b for feeding the fertilizer for each strip.
The seedling transplanter 1 is for planting paddy rice seedlings in a paddy field, 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 has a pair of left and right steerable front wheels 6 and 6 that are driven and rotated, and a pair of right and left rear wheels 7 and that are driven and rotated.
, The transmission case 9 is mounted on the front side of the frame 8 and the engine E is mounted on the rear side. The rotational power of the engine E is once transmitted to the hydraulic pump mounted on the upper part of the transmission case 9 by the first belt transmission 10. From there, the power is transmitted into the transmission case 9 by the second belt transmission 11 that can be operated continuously. The power shifted by the transmission in the transmission case 9 is transmitted to the front wheels 6, 6 and the rear wheels 7, 7, and is transmitted to the planting section 4 via the transmission shaft 9a, the intermediate gear case 9b, and the transmission shaft 9c. It is transmitted. In the figure, 12 is a steering wheel for steering the front wheels 6 and 6, 13 is a seat for the driver, 14 is a step floor for the driver to move on the running vehicle body, and 15 is a spare seedling. The spare seedling mounting table 16 to be placed is a drawing marker for drawing the course of the traveling vehicle body 2 in the next step in a field scene.

The link device 3 includes a frame 8 of the traveling vehicle body 2.
The upper link 21 and the upper link 21
1 and the lower links 22, 22 are rotatably mounted,
A connection frame 23 is connected to the rear ends of these upper and lower links. The front end of a rolling shaft 24 rotatably supported on the planting portion 4 side is inserted and connected to the lower end of the connection frame 23. Thereby, the planting part 4 is mounted so as to be freely rollable in the traveling direction. Also, a hydraulic cylinder 26 for driving the link device 3 is provided with a frame 8 on the base side.
And the piston rod side thereof is connected via a spring to the distal end of an arm 27 integrally fixed downward from the bases of the upper links 21 and 21 downward. When the hydraulic cylinder 26 expands and contracts, the upper and lower links 21, 21, 22, 22 rotate around the support shaft on the link base 20 side, and the planting section 4 moves up and down.

The planting section 4 has an eight-row planting structure.
Upper and lower two-stage seedling table 3 that is sloped down and down after being shared
.. Are provided in parallel on the left and right sides, and the seedling tray transport paths 31,.
Each seedling tray transport path 31 includes upper and lower two-stage seedling platforms 30, 30.
The seedling trays, which are supplied one by one in this order, are transported downward in the first half, gradually change the transport direction in the middle, and transported upward in the second half. An empty box housing frame 38, which is connected to the terminal end of the seedling tray transport path 31 and is capable of housing a plurality of empty seedling trays from which seedlings have been taken out at the seedling take-out position P, which will be described later, is stacked up and down. Is provided. As the seedling tray, a flexible seedling tray in which seedlings are housed one by one in a large number of seedling pots arranged vertically and horizontally is used.

A seedling tray feeder 32 for transporting the seedling tray along the seedling tray transporting path 31 corresponding to each seedling tray transporting path 31, and a seedling tray being transported at the seedling removal position P of the seedling tray transporting path 31. Seedling take-out device 33 for taking out seedlings one row at a time from the side of the pot, seedling carrying device 34 for carrying out the taken-out seedlings in a locus that draws an arc forward and downward, and seedling removing device for taking out seedlings from the seedling carrying device 35, a seedling lateral feeding device 36 for laterally feeding half a row of seedlings extracted by the seedling extracting device halfway to the left and right sides, and taking the seedlings supplied by the seedling lateral feeding device and planting them in a field. Seedling plant 3
7, 37 are provided. In other words, these devices constitute one unit for each two lines, and these are referred to as a first unit, a second unit, a third unit, and a fourth unit in order from the left.

The seedling tray transport paths 31,... And the planting section frame that supports each device and has a built-in transmission mechanism for each device are provided with a drive case disposed inside the U shape of the seedling tray transport paths 31,. A ladder-shaped main frame 42 is formed integrally with the rear frames 41,..., And five planting transmission frames 45,. The bases of the seedling support frames 46,... Are fixed to the upper surfaces of the drive cases 41, and support the upper and lower two-stage seedling mounts 30, 30,.
The rolling shaft 24 has a planting portion support bracket 48 fixed to the left and right horizontal portions of the lower left and right horizontal portions of the main frame.
Is rotatably inserted into a bearing case 50 attached to the motor. Thereby, the entire planting portion is supported in a freely rolling manner.

Below each unit, there are provided floats 52,... Which slide while leveling the field scene during planting work. On both left and right sides of these floats 52,..., Groove forming devices 54,... For forming fertilizer grooves in the field scene near the seedling planting position of each strip, and a plan view section located on the rear side thereof has a rear opening. A U-shaped fertilizer application guide 5c,... Is attached, and fertilizer application hoses 5d,... For transferring fertilizers fed from the fertilizer feeding devices 5b,.

The two central floats 52, 52 are also sensors for detecting irregularities in the field scene. During planting work, the vertical movement of the front ends of the sensor floats 52, 52 is detected by a vertical movement detecting mechanism 55, By switching the control valve of the hydraulic cylinder according to the detection result to move the planting section 4 up and down, the planting depth of the seedlings is always kept constant. Each of the floats 52,...
Are attached to the float support arms 58,... Which rotate integrally with the base 7, and the planting depth of the seedlings is adjusted by rotating the planting depth adjusting shaft 57 to change the mounting height of the float. .

Next, the configuration of each section of the planting section 4 will be described. The seedling tray feeder 32 includes a pair of right and left feed claws 6.
0, 60 and locking claws 61, 61 are provided. Feeding claw 6
Numerals 0 and 60 reciprocate up and down along the seedling tray transport path 31, and when moving downward, the seedling tray feed square holes formed at the left and right edges of the seedling tray at the same pitch as the pot pitch. When it engages and moves upward, it operates so as to be disengaged from the square hole and get over to the next square hole. The locking claws 61, 61 are interlocked with the operation of the feed claws 60, 60, and are disengaged from the square holes when the feed claws 60, 60 move downward, and engage with the square holes when the feed claws 60, 60 move upward. Act to support the seedling tray. These feed claws 60, 60 and locking claws 61, 61
The seedling tray is intermittently fed along the seedling tray transport path 31 by one pitch of the pot arrangement. The feeding operation of the seedling tray feeding device 32 is performed by a seedling removal device 33 described later.
Are not inserted into the pot of the seedling tray. In addition, on the upper side of the feeding claws 60, 60 and the locking claws 61, 61, the locking claws 61, 61 protrude into the seedling tray transport path in conjunction with exiting from the square hole of the preceding seedling tray, and are transferred to the seedling tray transport path. Blocking claws 63, 63 for temporarily receiving a subsequent seedling tray sliding down the road 31 are provided.

The operation mechanism of the seedling tray feeder 32 is shown in FIG.
As shown in FIG. 8, a seedling tray feed cam 65 is provided on a first transmission shaft 64 that penetrates the upper part of the drive case 41 to the left and right, and the roller 67 rotatably supported by a seedling tray feed operation arm 66 is attached to the roller 67. The seedling tray feed operation arm 66 is urged by a spring 68 so as to always contact the outer peripheral surface of the cam 65. The seedling tray feed operation arm 66 is attached to a seedling tray feed drive shaft 69 provided below the drive case 41 so as to rotate integrally therewith. Arm 70, 7
0 is integrally attached, and the feed claws 60 are connected to the distal end thereof. The rotation of the seedling tray feed cam 65 causes the seedling tray feed operating arm 66 to swing, and the swing of the seedling tray feed operating arm 66 is transmitted to the seedling tray feed drive arms 70, 70 via the seedling tray feed drive shaft 69. Then, the feed claws 60 are reciprocated up and down. When the cam 65 pushes the roller 67, the feed claws 60, 60 move downward to feed the seedling tray, so that the feed claws 60, 60 can feed reliably, rattling or the like is less likely to occur, and the seedling tray cannot be moved. Can be sent accurately.

The seedling take-out device 33 includes seedling push-out pins 72 arranged at equal pitches with respect to the horizontal pot of the seedling tray.
Are provided so as to operate integrally with a pair of left and right slide shafts 73 slidably supported in the front-rear direction. As shown in FIGS. 7 and 9, a rack 73a is formed on the slide shaft 73, and the first sector gear 74 is engaged with the rack. A gear shaft 75 to which the first sector gear 74 is attached has another second sector gear 7.
6 is attached. The second sector gear 76 meshes with a gear portion 79a of a seedling removal operating arm 79 rotatably supported by a support shaft 78. A roller 80 is rotatably supported at an end of the seedling picking operation arm 79 opposite to the gear portion 79a, and the roller 80 is guided by a guide groove 81a of a seedling picking cam 81 provided on the first transmission shaft 64. It is stuck in. The rotation of the seedling removal cam 81 causes the slide shaft 7 to rotate.
When the slide shaft slides backward and backward, the seedling push-out pins 72,... Are formed at the bottom of the pot for one row of pots in the seedling tray at the seedling removal position P. It is inserted into the pot through the cut, and the seedling is pushed backward.

The gear shaft 75 is provided with a safety clutch 75a which cuts off transmission from the first sector gear 74 to the gear shaft 75 when a predetermined load or more is applied to the transmission system after the gear shaft 75. ing. The provision of the safety clutch prevents the seedling removal device 33 from being damaged even if the position of the cut in the pot is shifted from the seedling pushing pins 72,.

The gear shaft 75 has a seedling pushing pin 7.
A mechanism 75 for adjusting the stroke of the front and rear slides of 2,.
b, and a mechanism 75c for adjusting the positions of the left and right slide shafts 73, 73 are provided. These adjustment mechanisms 75
Since b and 75c are provided so as to be exposed from the drive case 41, it is easy to perform an adjusting operation.

The seedling tray feed cam 66 and the seedling picking cam 81 have a common cylindrical body 64 a rotatably fitted to the first transmission shaft 64.
And the cylinder and the first transmission shaft 64 are connected to each other so as to be able to be engaged and disengaged by a fixed position stop clutch 64b which is externally operated. Thereby, the drive of the seedling tray feeding device 32 and the seedling removal device 33 can be stopped in units of two lines.

The seedling conveying device 34 includes a seedling pushing pin 72, which is opened rearward and rearward and has a notched upper side and has a concave shape as viewed from the rear.
.. are provided. The seedling holder 83 includes two upper and lower swing links 8.
Support members 86, 86 connected to 4,85,84,85
The left and right ends are fixed, and reciprocate in a circular locus by the swing of the swing link.
As shown in FIGS. 6 and 10, the drive mechanism of the seedling transport device controls the rotation of the first transmission shaft 64 via the arm 88, the telescopic rod 89, and the arm 90 to rotate the main frame 4.
2 and transmitted to the input shaft 92 of the seedling transfer transmission case 91 as a repetitive rotation motion, and the base of the lower swing link 85 is integrally formed from the input shaft via a pair of transmission gears 93 and 94. It is configured to transmit a repetitive rotation motion to the attached seedling transport drive shaft 95.

By the repetitive rotation of the seedling transport drive shaft 95, the swinging links 84, 85, 84, 85 swing up and down, and the seedling holder 83 reciprocates along an arc locus. When the seedling holder 83 is positioned at the upper end of the trajectory, the seedling holding unit receives one row of seedlings pushed out of the seedling tray by the seedling removal device 33, and the seedling holder moves to convey the received seedling to the lower front side. I do. When the swing links 84 and 85 move upward and the seedling holder 83 reaches the upper end of the trajectory, the lower swing link 8
5 hits the stopper 96 and stops. The arm 88 still rotates to move the swing link 85 upward, but the rotation of the arm 88 is absorbed by the spring 89a interposed in the telescopic rod 89, and the swing link 85 is moved by the stopper 96. It remains stopped. During this time, the seedling holder 83 is stopped at the upper end of the trajectory, so that the seedling removal device 33 reliably transfers the seedlings from the seedling tray to the seedling holder 83.

The seedling removal device 35 is provided so that a comb-shaped seedling hitting device 100 that can pass back and forth through the seedling holding portion of the seedling holder 83 rotates vertically, and the seedling holder 83 moves to the lower end of the movement locus. At the time, the seedling hitting 100 receives the seedlings held in the respective seedling holding portions of the seedling holder 83, pulls out the seedlings by passing only through the seedling holder 83, and the seedling hitting 100 pivots downward and is extracted. Seedling feed belts 113, 1 of seedling lateral feeders 36, 36
13 and knock it down.

As shown in FIGS. 11 and 12, the seedling hits 100,... Are integrally attached to a rotatable left-right seedling hitting mounting shaft 101. As shown in FIG. Seedling hitting shaft 1
A roller 103 is attached to a rotating arm 102 fixed to the base unit 01, and the rotating arm 102 is moved by a spring 106 so that the roller comes into contact with a cam surface of a seedling hitting cam 105 attached to a seedling hitting cam shaft 104. It is energizing. When the seedling hitting cam 105 rotates, the roller 10
When 3 is fitted, the seedling tapping 100 is quickly rotated downward by the tension of the spring 106 and operates so as to immediately return to the original position.

As shown in the drawing, two units of seedling hits 100,... Are operated by a set of rollers 103 and seedling hitting cams 105. FIGS. 11 and 12 show the seedling removal devices 35, 35 of the first unit and the second unit. The seedling hitting mounting shaft 101 (1) of the first unit and the seedling hitting mounting shaft 101 (2) of the second unit are individually fixed to the rotating arm 102, respectively. Rotating arm 102 with the axis of 101
Fixed plate 10
1a and the fixing plate 102a of the rotating arm
08 and a nut 109 to fix them so that they rotate together. Bolt insertion hole 102b in fixing plate
Is formed in an arc shape centered on the axis of the seedling hitting mounting shaft 101, and by adjusting the insertion position of the bolt 108 to change the phase angle of the seedling hitting mounting shaft 101,
The mounting height of 0 can be changed. In addition, the fixed plate part 102a for the seedling seedling hitting attachment shaft of the first unit 102a.
(1) and the fixed plate portion 102a (2) for the seedling hitting attachment shaft of the second unit are shifted in angle so that the bolt 108 and the nut 109 of both units do not interfere with each other.

The seedling lateral feeder 36 includes a main frame 40.
A pair of left and right seedling feed belts 103, 103 wound around a drive roller 111 and a driven roller 112 attached to a seedling lateral feed drive shaft 110 protruding rearward from the rear so that the respective lateral feed action portions move outward. It is provided symmetrically. The seedlings N,... Of one horizontal row that have been extracted by the seedling extracting device 35 are the respective seedling feeding belts 11 of the two sets of seedling lateral feeding devices.
The seedling feed belts 113, 113, which have received the seedlings, convey the left and right halves to the left and right sides, respectively. The seedlings N transported by the seedling feeding belt 113 are dropped between a pair of planting guides 114 provided with an appropriate gap.

The seedling planting device 37 includes a planting transmission frame 45.
A pair of seedling implants 122, 122 are attached to a rotating case 121 that rotates integrally with a planting drive shaft 120 provided at the rear end of the plant, and the seedling implants 122, 122 move along a closed-loop tip trajectory. I do. Each seedling implantation tool 122 alternately takes the seedlings dropped between the planting guides 114, 114 one by one, and moves them between the planting guides 114, 114 to plant the seedlings in the field.

FIG. 5 is a transmission mechanism diagram of the planting section. The rotational power from the traveling vehicle body 2 is input to an input shaft 130 that projects forward from the lower left and right horizontal portions of the main frame 42. The input shaft 130 is transmission-connected to the second transmission shaft 133 in the lower left and right horizontal portion 42a via bevel gears 131 and 132. Then, the transmission is transmitted from the second transmission shaft 133 to the seedling lateral feed drive shaft 110 of each strip via eight sets of bevel gears 135 and 136. A pair of adjacent seedling lateral feed drive shafts 110, 110 are configured to rotate in opposite directions. In each planting transmission frame 45, there is provided a transmission chain 137 that is hung on a sprocket 137a attached to the second transmission shaft 133 and a sprocket 137b attached to the planting drive shaft 120. The power is transmitted from the transmission shaft 133 to each planting drive shaft 120.

Further, the second transmission shaft 133 is connected through bevel gears 140 and 141 to lower ends of two left and right upper and lower transmission shafts 142 which are transmission portions in a direction intersecting with the second transmission shaft 133, respectively. ing. Left vertical drive shaft 14
The upper end of the second transmission unit 2 is connected to the first transmission shaft 64 for the first and second units via bevel gears 143 and 144, and the intermediate part thereof is a bevel gear 147,1.
It is operatively connected to the seedling hitting camshaft 104 for the first unit and the second unit via 48. Similarly, the upper and lower transmission shaft 142 on the right side is in transmission connection with the first transmission shaft 64 for the third unit and the fourth unit and the seedling hitting camshaft 104.

As described above, the first transmission shaft 133 and the seedling hitting camshaft 104 of the first unit and the second unit are common, and the third unit and the fourth unit have the first transmission shaft 133 and the seedling hitting camshaft 104. Since they are common, the second transmission shaft 133 to the first transmission shaft 133 and the seedling hitting camshaft 104
The number of transmission parts (upper and lower transmission shafts 142, etc.) that transmit power is と な り of the number of planted strips, so that the number of parts can be reduced and the transmission mechanism can be simplified. Further, by disposing the transmission portion in the space between the two units, the first transmission shaft 133
In this case, the distance from the transmission connection position with the transmission portion to the operating position of the cam and the like is equal in both units, so that there is no phase difference due to shaft deflection between the devices in both units.

[0030]

As described above, in the seedling transplanter according to the present invention, when transmitting the power from the drive source to the plurality of seedling extracting devices and the seedling planting device, the first transmission for transmitting the power to the seedling extracting device. A transmission to either the shaft or the second transmission shaft transmitting to the seedling planting device, and then transmitting to the other transmission shaft via a transmission portion arranged at an intermediate portion between two adjacent seedling tray transport paths. By doing so, it is possible to simplify the configuration by reducing the number of parts of the transmission section that intersects with the transmission shaft, and furthermore, it is possible to prevent a phase difference in the operation of each strip device due to bending of the transmission shaft and the like. Was.

[Brief description of the drawings]

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

FIG. 2 is a plan view of the seedling transplanter.

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

FIG. 4 is a rear view of a main part of the planting unit.

FIG. 5 is a transmission mechanism diagram of the planting section.

FIG. 6 is a rear cross-sectional view of the upper and lower transmission frames and the periphery thereof.

FIG. 7 is a rear sectional view of the drive case.

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

FIG. 9 is a sectional view taken along line S2-S2 of FIG. 7;

FIG. 10 is a side sectional view of a seedling transport drive case.

FIG. 11 is a side view of the seedling removing device.

FIG. 12 is a rear sectional view of the seedling removing device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 seedling transplanter 2 traveling vehicle body 3 link device 4 planting unit 31 seedling tray transport path 32 seedling tray feed device 33 seedling removal device 34 seedling transport device 35 seedling removal device 36 seedling lateral feed device 37 seedling planting device 40 seedling tray feed Device 65 First transmission shaft 133 Second transmission shaft 142 Vertical transmission shaft (transmission unit)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hideo Iseki 1 Eighth-Yachikura, Tobe-cho, Iyo-gun, Ehime Prefecture Iseki Agricultural Machinery Co., Ltd. F term in the company's engineering department (reference) 2B062 AA20 AB01 BA05 BA06 BA07 BA13 BA14 BA18 BA32 BA80

Claims (1)

[Claims] 1. A seedling removal device for providing a plurality of rows of left and right seedling tray transport paths for transporting seedling trays containing seedlings, and extracting seedlings from a seedling tray being transported through the seedling tray transport path; In a seedling transplanter provided with a seedling planting device for planting the seedlings taken out by the take-out device in the field and corresponding to each seedling tray transport path, a first transmission shaft in the left-right direction that transmits to each seedling take-out device, A second transmission shaft in the left-right direction that transmits to each seedling planting device, and transmits power from a driving source to one of the first transmission shaft or the second transmission shaft, and from the one transmission shaft. A seedling transplanter characterized in that transmission to the other transmission shaft is performed via a transmission unit disposed at an intermediate portion between two adjacent seedling tray transport paths.