CN101040580B

CN101040580B - Seedling-planting apparatus

Info

Publication number: CN101040580B
Application number: CN2007100894678A
Authority: CN
Inventors: 盐崎孝秀
Original assignee: Iseki and Co Ltd
Current assignee: Iseki and Co Ltd
Priority date: 2006-03-24
Filing date: 2007-03-23
Publication date: 2011-06-01
Anticipated expiration: 2027-03-23
Also published as: JP4924802B2; KR100894996B1; KR20070096853A; JP2007252317A; CN101040580A

Abstract

The invention relates to a seedling-planting apparatus, which miniaturizes the seedling-planting apparatus to entirely miniaturize the seedling-planting apparatus. The seedling-planting apparatus comprises: rotor using rotational axle center as center towards left right of body; axes projecting towards left right from the said rotor, the said axes being used as structure respectively rotational with the said rotor with a seedling-planting apparatus mounted thereon. The seedling-planting apparatus comprises: taking seeding claw for holding seeding; seeding extruding body for extruding the seeding from taking seeding claw towards length direction of the taking seeding claw; extruding cam rolling together with rotor and making the seeding extruding body acting; extruding arm contacting with the extruding cam; posterioranterior arm axle; and extruding spring for extruding the extruding arm towards the direction contacting with the extruding cam. The said extruding arm forms a structure rocking along the arm axle as pivoting point axle and a seeding extruding body is connected on the extruding arm towards right and left direction.

Description

Seedling-planting apparatus

Technical field

The present invention relates to be arranged on the seedling-planting apparatus on the seeding transplant machine of rice transplanter etc.

Background technology

The applicant has applied for a kind of patent application of rotary type seedling-planting apparatus, and this device each two seeds that amount to four about possessing on the rotating box that the plantation driving shaft with left and right directions rotates as center of rotation are planted instrument.

Though disclosed seedling-planting apparatus can be planted the seedling of two drillings with a rotating box in patent documentation 1 (TOHKEMY 2003-158904 communique), but the seedling that seedling claw kept of seed being planted instrument extrudes the moving up and down direction of body and is used to make seedling to extrude the direction that direction was configured to and drove the axle quadrature that extrudes arm of shaking of the moving up and down extrusion arm of body at the seedling that extrudes on the above-below direction and seed is planted in the farmland, plant interference between the instrument in order to eliminate adjacent seed, be necessary to enlarge the movement locus that seed is planted instrument.Therefore, seedling-planting apparatus is whole becomes big.

Summary of the invention

So problem of the present invention is to make seed plant the instrument miniaturization, and then can be with the seedling-planting apparatus integral miniaturization.

At above-mentioned problem, the present invention makes to become following structure.

Promptly, a kind of seedling-planting apparatus, being provided with the center of rotation 24a towards the body left and right directions is the rotor 21 that rotate at the center, and be provided with from this rotor 21 outstanding terminal shaft 25 of direction to the left and right, this terminal shaft 25 makes following structure: utilizing the rotation of rotor 21 with the transmitting gear 35 of fixing internal-gear 21a engagement is to revolve round the sun in the center with sun wheel shaft 24, first

eccentric gear

36 and 37 engagements of second eccentric gear with these transmitting gear 35 unitary rotation, this second

eccentric gear

37 and 38 engagements of variable speed gear, this variable speed gear 38 and sun gear 27 are fixed on the sun wheel shaft 24, counter gear 39 and sun gear 27 engagements, engagement extreme gear 40 on this counter gear 39, this extreme gear 40 is fixed on the above-mentioned terminal shaft 25, this terminal shaft 25 rotates respectively with above-mentioned rotor 21, on above-mentioned terminal shaft 25, seed is installed and plants instrument 26, at rotor 21 is to be provided with seed on the circumference at center to plant instrument 26 with sun wheel shaft 24, this seed is planted instrument 26, possesses: the seedling claw 47 that keeps seedling; Seedling is extruded body 48 from this seedling claw 47 to the seedling of the length direction extrusion of seedling claw 7; Make seedling extrude the extrusion cam 50 of body 48 actions with rotor 21 unitary rotation; The extrusion arm 51 that contacts with this extrusion cam 50; The arm axle 52 of fore-and-aft direction; And, the extrusion spring 54 of arm 51 to the direction pushing that contacts with extrusion cam 50 will be extruded, it is the structure that rotary middle spindle shakes that above-mentioned extrusion arm 51 constitutes with above-mentioned arm axle 52, extrudes body 48 at the seedling that is connected with gap that has left and right directions on the extrusion arm 51 of left and right directions setting.

According to the present invention, towards the extrusion arm 51 of body left and right directions configuration, seedling extrudes body 48 seedling that seedling claw 47 is kept is extruded on the length direction of seedling claw 47 by action on above-below direction, so can reduce to move the fore-and-aft direction space that extrudes arm 51.Have again, owing to extrude body 48 extruding the seedling that connected with gap that has left and right directions on the arm 51, so even seedling extrudes about the application point that body 48 extrudes seedlings to be offset, also less to the influence of the plantation posture of seedling.

According to the present invention, owing to extrude arm 51 towards the configuration of body left and right directions, so can make seed plant instrument 26 and seedling-planting apparatus miniaturization.Have again,, thereby improve the plantation posture of seedling in the farmland even skew is also less to the influence of the plantation posture of seedling about the application point of seedling extrusion body 48 extrusion seedlings.

Description of drawings

Fig. 1 is the end view of manned rice transplanter of having equipped the seedling-planting apparatus of the embodiment of the invention.

Fig. 2 is the vertical view of the manned rice transplanter of Fig. 1.

Fig. 3 is the vertical view of seedling-planting apparatus of the manned rice transplanter of Fig. 1.

Fig. 4 is the end view of seedling-planting apparatus of the manned rice transplanter of Fig. 1.

Fig. 5 is the driver composition of seedling-planting apparatus of the manned rice transplanter of Fig. 1.

Fig. 6 is the inside left view of seedling-planting apparatus of the manned rice transplanter of Fig. 1.

Fig. 7 is the inner right side view of seedling-planting apparatus of the manned rice transplanter of Fig. 1.

Fig. 8 is the figure that the seed of the manned rice transplanter of presentation graphs 1 is planted the motion track of instrument front end.

Fig. 9 is the in-built figure that the seed of the manned rice transplanter of key diagram 1 is planted instrument.

Figure 10 is that the X-X line cross section of Fig. 9 is to view.

Figure 11 is that the Y-Y line cross section of Fig. 9 is to view (Figure 11 (a)) with plant the end view (Figure 11 (b)) of instrument from the seed that the Y-Y line direction of arrow of Fig. 9 is observed.

Among the figure:

The manned rice transplanter of 1-, the 14-seedling-planting apparatus, the 21-rotor, the 24a-center of rotation,

The 25-terminal shaft, the 26-seed is planted instrument, the 47-seedling claw, the 48-seedling extrudes body,

50-extrudes cam, and 51-extrudes arm, the 52-arm axle, and 54-extrudes spring

Embodiment

Embodiments of the present invention are described below with reference to the accompanying drawings.

Fig. 1 and Fig. 2 are left side view and the vertical views of having equipped the manned rice transplanter of seedling-planting apparatus of the present invention.This manned rice transplanter 1, the rear of each the pair of right and left front-

wheel

3,3 that driving is rotated possessing loading engine 2 and the walking vehicle body 5 of trailing wheel 4,4, the seed that has connected six drillings by lifting linkage 6 is planted portion 7.In addition, walking vehicle body 5 be provided with handle attend a banquet 8, handle the steering wheel 9 of front-

wheel

3,3, load standby seedling in advance be equipped with seedling loading stage 10.

Seed is planted portion 7, and to be provided with the front portion at the upside from the plantation driving section case 12 of walking vehicle body 5 transmissions inputs be the seedling carrying base 13 that upper mode tilts, simultaneously, the rearward end in the plantation driving section of planting driving section case 12 is provided with the seedling-planting apparatus 14 of one group of per two row ...Make buoyancy aid 15 ... when under the state of ground connection body being advanced, seedling carrying base about 13 move back and forth and with the blanket shape seedling one strain strain on the platform successively to the seedling conveying end 16 of seedling carrying base lower end one side ... supply with, seedling-planting apparatus 14 ... its separation and taking-up are planted in the farmland again.

Secondly, describe seedling-planting apparatus 14 in detail.

Fig. 3 represents the vertical view of seedling-planting apparatus 14, and Fig. 4 represents end view, and Fig. 5 represents inner driver composition.Rear end at plantation driving section case 12 is provided with fixed support body 20 integratedly with plantation driving section case 12, is that the chimeric freely rotor (rotating box) 21 that has is rotated at the center in the inboard of fixed support body 20 by bearing 22 and with center of rotation 24a.On rotor 21, be provided with three

terminal shafts

25,25,25 freely in the phase rotated with 120 degree between mutually on the circumference that with sun wheel shaft 24 is the center, one has been installed seed and has been planted

instrument

26,26 on the both ends, the left and right sides outstanding from the rotor 21 of each terminal shaft 25.In addition, above-mentioned terminal shaft 25 as from rotor 21 to the left and right direction outstanding and relatively this rotor 21 rotate respectively spool.

Be provided with driven wheel 30 with this rotor 21 unitary rotation in the inside of rotor 21.By input gear 31 this driven wheel 30 is slowed down and rotate, and rotor 21 is rotated along arrow B direction (Fig. 4, Fig. 7) with the rearward end that is arranged on plantation driving section case 12.Have again, be provided with when cutting off power transmission input gear 31 in driving section and stop clutch what predetermined phase stopped from sprocket wheel 32a to input gear 31 to the chain and sprocket driving device 32 of input gear 31 transmissions.

Fig. 6 represents the left view of seedling-planting apparatus inside, and Fig. 7 represents right side view.

Fig. 6 represents the engagement of driven wheel 30 and input gear 31.The number of teeth of driven wheel 30 is three times of input gear 31 numbers of teeth, driven wheel 30 be three places (with Fig. 6 in the position of engagement of input gear 31 be the position at 0 °, 120 °, 240 ° at benchmark and autorotation center) be the not mitre gears of maximum gauge, input gear 31 is that to indicate circle mark one place (is 0 ° of position of benchmark with the position of engagement with the driven wheel 30 of Fig. 6) be the not mitre gears of minimum diameter.Therefore, when driven wheel 30 meshed with input gear 31 0 °, 120 °, 240 ° position, the velocity of rotation of driven wheel 30 was slack-off, and the velocity of rotation of driven wheel 30 changed with 1/3 cycle.

In addition, owing to be provided with the gear train of using to

terminal shaft

25,25,25 transmissions in rotor 21 inside, so the interaction relation of this gear train is described.

Rotate under the rotation of the driven wheel 30 that input gear 31 is meshed with the rotor 21 of these driven wheel 30 one, with the transmitting gear 35 of internal-gear 21a (Fig. 7) engagement of the case inner face that is fixed on fixed support body 20 be that the limit rotation is moved in central circular track top with the rotation interlock of rotor 21 and in sun wheel shaft 24 with rotor 21.This transmitting gear 35 and first eccentric gear 36 together movable fit on the end is fixedly supported to back shaft 34 on rotor 21 two sides, transmitting gear 35 and first eccentric gear, 36 unitary rotation.This first

eccentric gear

36 and 37 engagements of second eccentric gear, this second eccentric gear 37 be fixed on the end and rotate variable speed gear 38 engagements on the sun wheel shaft 24 that is supported in freely on rotor 21 two sides, so when variable speed gear 38 rotates under the rotation of second eccentric gear 37, be engaged in counter gear 39 on this sun gear 27 by being fixed on the sun gear 27 on the sun wheel shaft 24, drive the extreme gear 40 that is engaged on this counter gear 39.Extreme gear 40 is fixedly supported on respectively and is equally spaced on sun wheel shaft 24 is to be provided with on the circumference at center on three the

terminal shaft

25,25,25.Have,

extreme gear

40,40,40 also is noncircular gear (a not mitre gears) again.

When rotor 21 rotates, three seed respectively is set in the both sides of this rotor 21 plants instrument 26 and on circuit orbit, move.At this moment, transmit to

terminal shaft

25,25,25 by gear train with the action of the transmitting gear 35 of the rotation of rotor 21 interlock, seed is planted the posture change of

instrument

26,26,26.Like this, seed plant instrument 26 as described later the front end of seedling claw 47 describe track P (Fig. 4, Fig. 6) and move like that.

Increased after body moves to the front end motion track of the seedling claw 47 of the planting area in farmland as shown in Figure 8 according to the kind plant number of per unit area and difference.Along with the kind plant number of per unit area increases, the front end of above-mentioned seedling claw 47 changes to (d) from track shown in Figure 8 (a).

In addition, though be provided with seed on three the terminal shaft 25 and plant instrument 6 being provided with equal intervals slightly on the rotation direction of rotor 21, be supported in that each terminal shaft 25 on the rotor 21 is supported on rotationally by each bearing 22 and on the fixed support body 20 of installing to the body outside by bearing 23.In addition, owing to being supported on rotor 21 on the body and the bearing 22 of its rotation being located on each terminal shaft 25, and support rotor 21 with these a plurality of bearings 22, so can make this bearing 22 miniaturizations, make rotor 21 lightness therefrom, so rotor 21 can successfully rotate, and the realization seed is planted the raising of precision.

Owing to directly supports terminal shaft 25 with above-mentioned bearing 22, thus the raising of the positional precision of each terminal shaft 25, and realization plant from seed instrument 26 seedling carrying base 13 taking-ups the seedling amount of getting and plant the raising of the plantation precision of the degree of depth etc. to the seed in farmland.

In addition, make at the outside dimension that the bearing 22 under bearing 22 states has been installed on the terminal shaft 25 littler than the seal oil between fixed support body 20 that is installed on bearing 22 outsides and the rotor 21 envelope body 28 to the installation radius size of fixed support body 20.Therefore, under situation about bearing 22 being installed between fixed support body 20 and the rotor 21, the oil seal body installed surface is not interfered bearing 22, so can not damage the oil seal body installed surface, stablizes the quality of the oil seal body 28 of easy damaged.

In addition, the involutory position X (with reference to Fig. 4, Fig. 6) of plantation driving section case 12 and fixed support body 20 is positioned at rear one side of more leaning on body than the seedling supporting plate 55 (Fig. 4) of seedling carrying base 13, so can not hinder seedling supporting plate 55 ground of seedling carrying base 13 that fixed support body 20 is installed on the plantation driving section case 12, and installation property improves than in the past.

As shown in Figure 9, each seed formation of planting instrument 26 comprises: sharply be formed with and be installed in the seedling claw 47 of being planted the bifurcated shape of the leading section on tool box 46a, the 46b by the seed of pin 53 fastenings; Give prominence to the seedling that reaches backward movement at the downside of this seedling claw 47 and extrude body 48; The front end that is used to make this seedling extrude body 48 is given prominence to the extrusion cam 50 that reaches backward movement; This extrusion cam 50 sliding-contact is always carried out moving up and down extrusion arm 51 in the side and by the rotation of this cam 50; Run through the base portion of this extrusion arm 51 and the arm axle 52 that conduct extrudes the rotary middle spindle of arm 51; And, always will extrude arm 51 by being pressed in the extrusion spring 54 that extrudes on the cam 50 etc.

In addition, as as shown in Figure 10 to view of the X-X line cross section of Fig. 9, on seed is planted tool box 46b and face that rotor 21 contacts, have and be used to insert the peristome 46b1 that extrudes cam 50, to extrude cam 50 is inserted in this peristome 46b1, and behind the base portion with arm axle 52 insertion extrusion arms 51, arm axle 52 is fixed in seed plants on the tool box 46b, thereby the maximum gauge that extrudes cam 50 partly is connected to seed plants on the arm axle 52 of tool box 46b installation, can not plant tool box 46b and come off so extrude cam 50, and rotate and be supported in seed freely and plant inside in the tool box 46b from seed.

Terminal shaft 25 is inserted into to be arranged on from seed with the movable fit state plants the insertion mouth of central part of the extrusion cam 50 that the peristome 46b1 of tool box 46b installs.

In addition, seed is planted instrument 26 and is supported on the terminal shaft 25 to unitary rotation by four jiaos of axial regions of this 25 end, so the rotational motion of terminal shaft 25 is delivered to seed and plants instrument 26, seed is planted instrument 26 and terminal shaft 25 rotational motion integratedly.

In addition, under the rotational motion of terminal shaft 25, plant the case 46b of instrument 26, extrude cam 50 and also rotates, rotate limit in the rotation bottom that extrudes cam 50 at above-below direction with the extrusion arm 51 of the cam surface butt that extrudes cam 50 and shake on every side around arm axle 52 by seed.Have again, the length direction that extrudes arm 51 is configured to be positioned at and the parallel position of the extending direction of terminal shaft 25, seedling extrudes body 48 and extrudes arm 51 and is supported on the rotor 21 in the mode of rotating around the upwardly extending terminal shaft 25 of the right and left of body, can be moving up and down with predetermined period by the rotation of rotor 21.

Because the front end of seedling extrusion body 48 is forced out the clamping part of arm 51 and clamps,, on above-below direction, shakes seedling with the action interlock that extrudes arm 51 and in the mode that contacts seedling claw 47 so extruding body 48.

Grasp when seedling claw 47 clampings are arranged in the seedling of seedling carrying base 13 and keep,, can extrude the seedling that seedling claw 47 is kept to the farmland so extrude in the motion of direction up and down of body 48 at seedling.

In the formation of present embodiment, make to become the extrusion arm 51 that the clamping part that utilizes front end clamped shake when seedling extrudes body 48 in the above-below direction and the structure of shaking around arm axle 52.

For this reason, the length direction that extrudes arm 51 is configured to be in and terminal shaft 25 parallel positions, and, extrude arm 51 so that two end supports is planted arm axle 52 on the tool box 46b for shaking the center in seed, plant the rotation of tool box 46b and move up and down by seed with predetermined period.

Like this, owing to be to make the length direction that extrudes arm 51 structure towards the body left and right directions, thus can reduce to extrude the space of the fore-and-aft direction or the above-below direction of arm 51, and can prevent and the interference of parts on every side.

Structure by present embodiment, be configured to be in and the parallel position of the extending direction of terminal shaft 25 by the length direction that will extrude arm 51, so even track diminishes, seed is planted instrument 26 and also can not interfere, the miniaturization that seed is planted instrument 26 becomes possibility, therefore, the miniaturization of seedling-planting apparatus 14 becomes possibility.

In addition, under the rotational motion of terminal shaft 25, also rotate with the extrusion cam 50 of rotor 21 unitary rotation, the extrusion arm 51 that contact with the cam surface that extrudes cam 50 shakes the limit in the rotation bottom of extrusion cam 50 at above-below direction and shakes around arm axle 52.Have, extrude arm 51 and terminal shaft 25 parallel configurations, the base portion that extrudes arm 51 is planted arm axle 52 on the tool box 46b as shaking the center and can planting the rotation of instrument 26 (seed is planted tool box 46b) and move up and down with predetermined period by seed with two end supports in seed.

In addition, under the shaking who extrudes arm 51, seedling extrudes body 48 and carries out swing movement in the mode of contact seedling claw 47 on above-below direction.At this moment, because seedling claw 47 clampings grasp when being positioned at seedling on the seedling carrying base 13 and keep, can extrude the seedling that seedling claw 47 is kept to the farmland under the motion of direction up and down so extrude body 48 at seedling.

In addition, carry out seed at seedling claw 47 and plant when action, from being that the coupling part of the rectilinear motion transmission of the swing movement at center above-below direction from body 48 to seedling that extrude needs gap (general) with the arm axle 52 that extrudes arm 51, but the length direction of the extrusion arm 51 by seed being planted instrument 26 is configured to and the parallel configuration of the length direction of terminal shaft 25, and above-mentioned gap (general) is in the left and right sides width ((Ren) direction among Fig. 9) of body.But the seed of prior art is planted the fore-and-aft direction (with the direction of (Ren) quadrature among Fig. 9) that instrument 26 its above-mentioned gaps (general) are in body.Therefore, owing to plant the gap (general) that has on the instrument 26 on the fore-and-aft direction that is arranged on body in the seed of prior art, so seedling extrudes body 48 is planted its extrusion seedling of position in seed application point front and back skew easily, different and the relative seedling of the above-mentioned application point front and back skew in the interval of seedling claw 47 and above-mentioned application point, thereby the plantation posture of seedling can become and lean forward or hypsokinesis, makes the plantation posture disorder of seedling.But, also few to the influence of the plantation posture of seedling by gap (general) is set on left and right directions in the present embodiment even be offset about above-mentioned application point, so improve the plantation posture of seedling in the farmland.

In addition, plant in the instrument 26 in the seed of prior art, gap (general) is positioned at the fore-and-aft direction of body, so (radius of gyration direction of rotor 21) needs broad space in the vertical, thereby the size of seedling-planting apparatus integral body becomes big, but plant in the instrument 26 in the seed of present embodiment, because above-mentioned gap (general) is positioned at the left and right sides width of body, so the size of seedling-planting apparatus integral body is less.

Is that the center is shaken on above-below direction for making extrusion arm 51 with arm axle 52, will be provided with in the mode with rotor 21 unitary rotation with the extrusion cam 50 of the side butt that extrudes arm 51.By constituting the structure of a part of plane that extrudes cam 50 and the side butt that extrudes arm 51, can only extrusion arm 51 be shaken with the rotational load that extrudes cam 50, so the moving direction that the cam contact of the extrusion arm 51 when extruding cam 50 rotations and seedling extrude body 48 is in the same plane, therefore the promotion load that extrudes cam 50 does not exist, and available less load is rotated extrusion cam 50 smoothly.

In addition, by around the contact-making surface of terminal shaft 25 and the path part of the extrusion cam 50 of rotor 21 unitary rotation with extrude arm 51 butts, and then extrude arm 51 and shake, seedling extrudes body 48 and begins to extrude action.At this moment, making the cam bearing surface that extrudes arm 51 extrude cam 50 relatively tilts to the contact-making surface that extrudes arm 51.Like this, can prevent from sharply to contact and push with the contact-making surface that extrudes arm 51 contact-making surface that extrudes cam 50, the cam bearing surface that extrudes arm 51 is difficult to snap into the contact-making surface that extrudes cam 50, and it is smooth that seed is planted the rotation unsteady flow of instrument 26.

In addition, shown in Figure 10 (X-X line cross section is to view among Fig. 9), be arranged on rotor 21 sides with extruding the planting location (seedling claw 47 and seedling extrude the axis direction of body 48) of the installation site of cam 50 than seedling with deviating from position, the left and right sides.This formation can also be that the front end that will be equipped with extrudes the terminal shaft 25 of cam 50 is arranged on rotor 21 sides than the axis direction that seedling claw 47 and seedling extrude body 48 with deviating from position, the left and right sides.Therefore, when kind was planted seedlings, muddy water can not arrive the installation position that extrudes cam 50.

Because existing making extrudes extrusion cam 50 that arm 51 shakes and is positioned at seedling claw 47 and seedling and extrudes the seed that body 48 determined and plant near the position, so when kind is planted seedlings, sometimes muddy water hangs over and has been arranged in being planted in of back on the seedling in farmland, and exists seed to plant the situation of posture disorder.But, in the present embodiment, be disposed at from seedling claw 47 and seedling and extrude the far position of body 48 owing to will extrude cam 50, so muddy water can not arrive extrusion cam 50.In addition, be in the seed that extrudes around the cam 50 and plant the seedling claw 47 that the large-diameter portion of tool box 46b can be not plant instrument 26 with other seed and interfere, thereby can make the seedling-planting apparatus integral miniaturization.

Figure 11 (a) expression seed is planted the Y-Y line cross section of Fig. 9 of instrument 26 to view, and the seed that Figure 11 (b) expression is observed to apparent direction from the Y-Y line cross section of Fig. 9 is planted the end view of instrument 26.

As planting shown in the cutaway view of instrument 26 in expression seed among Fig. 9, when terminal shaft 25 rotates, extruding cam 50 plants tool box 46b by the seed of planting instrument 26 with the seed of this 25 unitary rotation and rotates, when extrusion arm 51 shakes, push stable the carrying out of reinforcing that extrusion arms 51 make 51 pairs of seedlings extrusion of extrusion arm body 48 by extruding spring 54 under the action of the cam mechanism that is made of extrusion cam 50 and extrusion arm 51.

Like this, the seedling-planting apparatus 14 of present embodiment, in the left and right sides of rotating the rotor 21 that supports freely by fixed support body 20 from the outside seed is set and plants instrument 26, and plant the seedling of two drillings simultaneously with a rotor 21, simultaneously, formation can be planted instrument 26 structure of plantation at a high speed with three seeds in every drilling.

Utilizability on the industry

By seedling-planting apparatus of the present invention is used in the riding type rice transplanter, thus the utilizability on the raising industry.

Claims

1. seedling-planting apparatus, being provided with the center of rotation (24a) towards the body left and right directions is the rotor (21) that rotate at the center, and be provided with from this rotor (21) outstanding terminal shaft (25) of direction to the left and right, this terminal shaft (25) makes following structure: utilizing the rotation of rotor (21) with the transmitting gear (35) of fixing internal-gear (21a) engagement is to revolve round the sun in the center with sun wheel shaft (24), first eccentric gear (36) and second eccentric gear (37) engagement with this transmitting gear (35) unitary rotation, this second eccentric gear (37) and variable speed gear (38) engagement, this variable speed gear (38) and sun gear (27) are fixed on the sun wheel shaft (24), counter gear (39) and sun gear (27) engagement, go up engagement extreme gear (40) at this counter gear (39), this extreme gear (40) is fixed on the above-mentioned terminal shaft (25), this terminal shaft (25) rotates respectively with above-mentioned rotor (21), seed is installed on above-mentioned terminal shaft (25) plants instrument (26), at rotor (21) is to be provided with seed on the circumference at center to plant instrument (26) with sun wheel shaft (24), this seed is planted instrument (26), possesses: the seedling claw (47) that keeps seedling; Seedling is extruded body (48) from this seedling claw (47) to the seedling of the length direction extrusion of seedling claw (47); With rotor (21) unitary rotation and make seedling extrude the extrusion cam (50) of body (48) action; The extrusion arm (51) that contacts with this extrusion cam (50); The arm axle of fore-and-aft direction (52); And, to extrude the extrusion spring (54) of arm (51) to the direction pushing that contacts with extrusion cam (50), it is the structure that rotary middle spindle shakes that above-mentioned extrusion arm (51) constitutes with above-mentioned arm axle (52), and the seedling that is connected with gap that has left and right directions on the extrusion arm (51) that is provided with towards left and right directions extrudes body (48).