JP6036410B2 - Seedling transplanter - Google Patents

Description

  The present invention relates to a seedling transplanter such as a rice transplanter for transplanting rice seedlings or the like in a field.

  As a seedling transplanter such as a riding type rice transplanter, a seedling transplanter that takes seedlings from a seedling mat while the seedling transplanter attached to the side of the rotary case rotates with the rotation of the rotary case and is planted in the field is known. (For example, refer to Patent Document 1).

  In the seedling transplanter disclosed in Patent Document 1, two seedling transplanters are provided on the side surface of one rotary case. This seedling planting tool uses a fixed seedling picking nail to scrape a predetermined amount of seedling from the seedling takeout port of the seedling mounting table, and when it enters the soil, an extrusion claw that pushes out the seedling from the seedling picking nail almost simultaneously activates the seedling. The seedling is planted in the field.

  The seedling placement table is connected to a lead cam that is slidable left and right on a lead cam shaft that is rotated by a driving force transmitted from the engine. The mat seedlings are transferred downward by the rotation of the seedling feeding belt when all the seedlings for one horizontal row have been supplied to the seedling outlets while being supplied to the seedling outlets of each strip.

  The planting timing (switching between loose planting, normal planting and dense planting) when the seedling planting plant planting seedlings in the field can be changed by switching the gear mechanisms with different ratios provided in the planting clutch case. It is possible.

  The power for driving these seedling placement tables and seedling planting tools is transmitted to the transmission case by the rotational power of the engine, transmitted to the planting clutch case through the planting transmission path, and transferred to the planting transmission case by the planting transmission shaft. Communicated. A part of the driving force transmitted to the planting transmission case is used for the reciprocating movement of the seedling mounting table described above and the rotation of the seedling feeding belt, and the remaining driving force is transmitted to the seedling planting device. The seedling planting tool is driven to rotate.

  The lead cam shaft that is rotated by the driving force from the planting transmission case is a switching operation of the number of rotations by the manual lever of the gear mechanism provided in the planting transmission case with different ratios. It is a configuration that can change the feeding speed of the seedling.

JP 2011-072232 A

  However, in the conventional seedling transplanting machine, the planting transmission case is provided with a gear mechanism with a different ratio and a manual lever for switching between the gears so that the feeding speed of the seedling can be changed. The mechanism is complex and the number of parts including the mechanism that enables forward and reverse rotation increases, resulting in the problem that the weight of the aircraft increases, and the size of the planting transmission case increases, requiring more space There was a problem of becoming. In addition, since maintenance work also takes time, there is a problem that the labor of the worker increases.

  By the way, the conventional seedling transplanting machine takes seedlings alternately from a mat seedling placed on a seedling placing table that reciprocates in the left-right direction while a pair of seedling planting tools constituting the seedling planting device rotate. It is the structure planted in a farm field.

  However, mat seedlings are heavy, and depending on the soil quality of the seedling cultivation soil and the tension of the roots, when the seedlings are taken by the seedling planting tool, they are drowned toward the center based on the left and right directions due to their own weight. The seedling may be bent at the left and right lower parts of the seedling, or the left and right one side lower parts, resulting in a gap. If the seedling planting tool passes through this gap, only a smaller amount of seedlings than the set amount can be picked up, or a seedling state in which the seedlings cannot be picked up at all will occur. There was a problem that extra work was required.

  An object of the present invention is to provide a seedling transplanting machine that allows a right and left reciprocating drive of a seedling mounting table with a simple configuration in consideration of the problems of the conventional seedling transplanting machine described above.

  In addition, the present invention takes into consideration the problems of the conventional seedling transplanting machine described above, and only a smaller amount of seedlings than the set amount can be taken or seedlings cannot be taken at all, so that seedlings cannot be planted in the field. An object of the present invention is to provide a seedling transplanting machine that suppresses occurrence of a so-called missing state.

In order to achieve the above object, the first present invention provides:
Traveling vehicle body (2),
A seedling platform (22) provided at the rear of the traveling vehicle body (2), on which seedlings to be planted in a field are placed;
A seedling planting device (23) for planting seedlings on the seedling platform (22) in a field;
An inter-strain switching device (7, 115) for changing an interval between seedlings planted by the seedling planting device (23);
A stock-to-stock detection unit (210) that detects the change contents by the stock-to-stock switching device (7, 115),
Planting transmission mechanism (8, 21) for transmitting the driving force from the engine (11) provided on the traveling vehicle body (2) to the seedling planting device (23) via the inter-plant switching device (7, 115) When,
A reciprocating mechanism (82, 82a, 124, 127) for reciprocating the seedling stage (22) in the left-right direction;
A reciprocating drive unit (240) capable of switching between forward and reverse, which generates a driving force necessary for reciprocating movement of the reciprocating mechanism (82, 82a, 124, 127);
A seedling transplanter comprising: a control unit (3) for controlling the reciprocating drive unit (240) based on a detection result of the inter-strain detection unit (210).

The second aspect of the present invention
An end part movement detection unit (250L, 250R) for detecting that the seedling stage (22) has moved to the end part;
The control unit (3) detects that the seedling stage (22) has moved to the end part by the end part movement detection part (250L, 250R), and thereby the seeding stage (22) is moved. When moving in the reverse direction, the reciprocating drive unit (240) is controlled so that the moving speed of the seedling platform (22) is faster than the normal speed, and after a predetermined time has elapsed, the normal speed is returned to the normal speed. The seedling transplanting machine according to the first aspect of the present invention, which is characterized.

The third aspect of the present invention
The first or second aspect of the present invention, further comprising a moving speed changing unit (280) that changes the rotating speed of the reciprocating driving unit to change the moving speed of the seedling platform (22). This is a seedling transplanter.

The fourth aspect of the present invention is
The planting transmission mechanism (8, 21) has a transmission shaft (8) for transmitting a driving force from the inter-plant switching device (7, 115),
A rotation speed detector (220) for detecting the rotation speed of the transmission shaft (8);
The control unit (3) detects that the seedling stage (22) has moved to the end part by the end part movement detection part (250L, 250R), and thereby the seeding stage (22) is moved. The second time is characterized in that, when moving in the reverse direction, the passage of the predetermined time is determined based on the number of revolutions of the transmission shaft (8) detected by the number of revolutions detection unit (220). It is a seedling transplanter of the present invention.

The fifth aspect of the present invention provides
The seedling planting device (23) has one rotary case (31) and two seedling planting tools (27a, 27b) attached to the rotary case (31),
A sparse planting instruction unit (260) for outputting an instruction to execute sparse planting to the control unit (3);
The rotational speed of the rotary case (31) is set to a rotational speed corresponding to twice the rotational speed of the sparse planting, and when receiving the instruction from the sparse planting instruction unit (260), the control unit ( 3) The seedling transplanting machine according to any one of the first to fourth aspects of the present invention, wherein the reciprocating drive unit (240) is intermittently driven.

The sixth aspect of the present invention provides
A seedling stage transmission mechanism (8, 21) for transmitting the driving force from the engine (11) to the reciprocating mechanism (82, 82a, 124, 127) via the inter-plant switching device (7, 115);
The seedling stage transmission mechanism (8, 21)
A gear unit (21) for operating the reciprocating mechanism (82, 82a, 124, 127) by using a driving force from the engine (11);
A drive switching unit (230) for switching whether the reciprocating mechanism (82, 82a, 124, 127) is driven by the gear unit (21) or the reciprocating drive unit (240); ,
The control unit (3) controls the drive switching unit (230) to drive the reciprocating mechanism (82, 82a, 124, 127) by the gear unit (21) based on the output of the inter-stock switching device. The seedling transplanter according to any one of the first to fifth aspects of the present invention, wherein the seedling transplanter is controlled.

  According to the first aspect of the present invention, the output of the reciprocating drive unit (240) is changed in accordance with the operation position of the inter-plant switching device (7, 115), so that the planting transmission is performed only by the reciprocating drive unit (240). Since the gear mechanism of the case and the complicated forward / reverse switching mechanism can be omitted, the configuration of the planting transmission case can be simplified.

  According to the second aspect of the present invention, in addition to the effect of the present invention described in claim 1, when the operation position of the inter-stock switching device (7, 115) is a position other than “dense planting”, for example, end movement When the detection units (250L, 250R) are in the detection state, the output of the reciprocating drive unit (240) is increased in accordance with a command from the control unit (3), so that the lower part of the mat seedling (28) is dripped. Even if the seedling occurs, the seedling planting device (23) can take a portion of the seedling that is not affected by drought. For this reason, it is prevented that a seedling of a smaller amount than that of a missing stock or setting is planted, and an extra work of manually replanting the seedling by an operator becomes unnecessary, thereby reducing the labor of the operator. .

  According to the third aspect of the present invention, in addition to the effect of the present invention described in claim 1 or 2, when the moving speed changing portion (280) is operated, the reciprocating distance of the seedling placing stand (22) is changed. Since the seedling removal position of the seedling planting device (23) can be changed in accordance with the density and growing condition of the seedlings, the seedlings are reliably planted by a set amount, and the planting accuracy is improved.

  According to the fourth aspect of the present invention, in addition to the effect of the present invention as set forth in claim 2, the timing for returning the output of the reciprocating drive unit (240) is performed by the rotational speed detection of the rotational speed detection unit (220). Since it is possible to prevent a deviation from occurring in the reciprocating timing of the seedling stage (22), it is possible to set the amount of seedlings and the amount of seedlings as set, and the planting accuracy is improved.

  According to the fifth aspect of the present invention, in addition to the effect of the present invention according to any one of claims 1 to 4, when the seedling placing table (22) reciprocates in accordance with an instruction from the sparse planting instruction section (260) Of the two seedling planting tools (27a, 27b) attached to the rotary case (31), one seedling planting tool (27a) takes a seedling and then the other seedling planting tool ( Since 27b) can pass through the part without seedling, the planting accuracy at the time of sparse planting is improved.

  According to the sixth aspect of the present invention, in addition to the effect of the present invention according to any one of claims 1 to 5, when the inter-stock switching device (7, 115) is switched to “dense planting”, the reciprocating mechanism (82, 82a, 124, 127) is configured to operate by receiving a driving force through the gear unit (21), so that the reciprocating movement of the seedling stage (22) is stagnant during dense planting work requiring high torque. This prevents seedling planting accuracy.

Left side view of a riding type rice transplanter according to an embodiment of the present invention The top view of the riding type rice transplanter of embodiment of this invention The connection diagram which shows the transmission structure of the driving force from the transmission case to a planting transmission case of the riding type rice transplanter of embodiment of this invention, and the schematic which shows the control system of the riding type rice transplanter of this Embodiment The partial cross section left view of the seedling planting apparatus of embodiment of this invention Sectional side view used for description of seedling feeding transmission configuration in the seedling mount of the embodiment of the present invention The front view used for description of the seedling feed transmission composition in the seedling stand of the embodiment of the present invention (A)-(c) The figure explaining operation | movement of the transmission mechanism by a drive side arm and a driven side arm of embodiment of this invention. The figure explaining the relationship between the setting position of the lever between stock | stocks in this Embodiment, and the operation condition of each part, etc. The schematic diagram explaining the movement of the mat seedling on the seedling stand when the drought countermeasure instruction switch is turned on and the movement of the seedling planting tool in the present embodiment Schematic showing the automatic oiling mechanism of the present embodiment The top view of the planting transmission case and seedling planting device of this embodiment (A): Front view of partial clutch switching mechanism viewed from the front side of the riding type rice transplanter, (b): Bottom view of FIG. 12 (a) Plan view of 8-type planting rice transplanter of this embodiment Schematic diagram of seedling platform of riding type rice transplanter of 8-row planting of this embodiment

(Embodiment)
1 and 2 show a left side view and a plan view of a riding type rice transplanter equipped with a seedling planting apparatus according to an embodiment of the present invention.

  In the present specification, the front / rear / left / right direction reference defines the front / rear, left / right reference based on the traveling direction of the vehicle body as viewed from the driver's seat.

  This riding type rice transplanter 1 is equipped with an engine 11 and is provided with six strips via a lifting link device 14 behind a four-wheel drive traveling vehicle body 10 having a pair of left and right front wheels 12 and rear wheels 13 that are driven and rotated. The seedling planting part 15 of the planting is connected.

  Further, the traveling vehicle body 10 is provided with a driver seat 16, a steering handle 17 for steering the front wheels 12, and a spare seedling table 18 on which spare seedlings are placed. An operation panel 2 in which various switches and display meters are arranged is provided below the steering handle 17, and a control circuit 3 is arranged on the back side of the operation panel 2.

  A mission case 4 is disposed at the front of the traveling vehicle body 10, and a front wheel final case 5 is provided on the left and right sides of the mission case 4, and left and right via a pair of left and right front wheel axles protruding outward. A pair of front wheels 12 are attached.

  The rotational power transmitted from the engine 11 to the transmission case 4 is shifted by the transmission in the transmission case 4 and then separated into the traveling power and the external extraction power and extracted. A part of the traveling power is transmitted to the front wheel final case 5 to drive the front wheel 12, and the rest is transmitted to the rear wheel gear case 6 to drive the rear wheel 13.

  Further, the external take-out power is transmitted to a planting clutch case 7 provided at the rear part of the traveling vehicle body 10 and further transmitted to the seedling planting unit 15 through the planting transmission shaft 8 and the planting transmission case 21. At the same time, it is transmitted to the fertilizer application 9 by the fertilizer transmission mechanism.

  The seedling planting part 15 is provided with a seedling stand 22 inclined in a configuration in which the front part is higher on the upper side of the planting transmission case 21 and at the rear end part of the planting transmission part of the planting transmission case 21. Three sets of seedling planting devices 23 are provided for each group.

  In addition, the seedling stage 22 is configured to be movable in the left-right direction by engaging the upper left / right moving guide member 95 with the support roller 92 that rotatably supports the guide member 95 from the lower side. The support roller 92 is attached to the upper portion of the seedling support frame 93. The configuration of the seedling stage 22 will be further described later with reference to FIG.

  When the traveling vehicle body 10 is advanced with the center float 24 and the side float 26 in contact with the ground, the seedling stage 22 reciprocates left and right, and the mat seedling 28 (see FIGS. 1 and 4) on the stage is placed on the seedling stage. In this configuration, one stock is sequentially supplied to the seedling collection port 25 of the seedling receiving frame 20 provided on the lower end side of the 22 and the seedling planting device 23 separates it and takes it out and plant it in the field.

  Next, the transmission structure of the driving force from the mission case 4 to the planting transmission case 21 and the control system of the riding rice transplanter 1 according to the present embodiment will be described with reference to FIG.

  FIG. 3 shows a connection diagram for explaining the transmission configuration of the driving force from the mission case 4 to the planting transmission case 21 and a schematic diagram for explaining the control system of the riding rice transplanter 1 of the present embodiment. Yes.

  As shown in FIG. 3, the driving force from the mission case 4 is input to the planting clutch case 7. A gear shift adjustment case 180 is connected to the output shaft 193 of the planting clutch case 7, and the planting transmission case 21 outputs the output from the planting clutch case 7 via the gear shifting adjustment case 180 and the planting transmission shaft 8. Is transmitted to.

  In the planting clutch case 7, the interval between seedlings planted in the field by the seedling planting device 23 (hereinafter referred to as “between plants”) is set in three modes of “dense planting”, “normal”, and “sparse planting”. An inter-stock shift shifter 115 for switching to any of the above is provided in a position parallel to the input shaft 192, and one end side of the inter-stock shift shifter 115 is configured to be operable by an operator via a coupling mechanism (not shown). Is connected to the inter-stock lever 123.

Here, in this embodiment, the length of the streak is 30 cm, and the number of strains per 3.3 m ² is 80 to 90 strains as “dense planting”, 50 to 70 strains as “normal”, and 37 to 47 strains. Is sparsely planted.

  The operator operates the inter-stock lever 123 to switch to any one of the three modes of “dense planting”, “normal”, and “sparse planting”, so that the inter-strain shift shifter 115 is connected via the coupling mechanism. Moves parallel to the input shaft 192, the combination of gears provided in the planting clutch case 7 is changed, and the driving force is applied to the planting transmission shaft 8 so as to obtain the rotational speed corresponding to the switched mode. Communicated.

  In addition, the inter stock lever 123 is provided with an inter stock detection potentiometer 210, and by detecting the operation position of the inter stock lever 123, the mode between the stocks set by the operator is “close planting”, “normal planting”, and This is a configuration for detecting which mode is “sparse planting”.

  The planting clutch case 7 is provided with a rotational speed detection sensor 220 that detects the rotational speed of the planting-side output shaft 7a.

  The detection signal from the inter-stock detection potentiometer 210 and the detection signal from the rotation speed detection sensor 220 are respectively sent to the control circuit 3 disposed on the back side of the operation panel 2.

  Further, the planting clutch case 7 has an inconstant speed switching clutch 120 that switches between transmitting the driving force from the input shaft 192 at a constant speed or transmitting at an inconstant speed, on the input end side of the output shaft 193. The inconstant speed switching clutch 120 is connected to an inconstant speed switching operation tool 120a configured to be operable by an operator via a coupling mechanism (not shown).

  In addition, the planting clutch case 7 is provided with a planting clutch 121 on the output end side of the output shaft 193 for switching the driving force transmitted from the mission case 4 side to the seedling planting unit 15 side. Yes. The planting clutch pin 121a is a columnar member that engages and disengages the planting clutch 121, and is configured to be movable back and forth in a direction orthogonal to the output shaft 193.

  The riding type rice transplanter 1 according to the present embodiment has a rotational speed of a rotational driving force output from the planting clutch case 7 by a speed change adjustment case 180 provided between the planting clutch case 7 and the planting transmission shaft 8. The change state is fine-tuned.

  In addition, the structure of the inter-strain shift shifter 115 and the planting clutch case 7 of the present embodiment corresponds to an example of the inter-strain switching device of the present invention. The inter-stock detection potentiometer 210 corresponds to an example of the inter-stock detection unit of the present invention. The rotation speed detection sensor 220 corresponds to an example of the rotation speed detection unit of the present invention.

  The planting transmission case 21 operates the seedling planting device 23 by the rotational driving force input from the planting transmission shaft 8, and switches whether to operate the lead cam shaft 82 by the action of the drive switching unit 230. It is a possible configuration.

  That is, in the riding type rice transplanter 1 of the present embodiment, the drive switching unit 230 provided in the planting transmission case 21 is spline-connected to the in-case transmission shaft 235, and the driving force from the planting transmission shaft 8 is supplied to the lead cam. A lead cam transmission clutch 232 for turning on / off whether to transmit to the shaft 82 side, and a lead cam transmission clutch solenoid 231 for sliding the lead cam transmission clutch 232 in parallel with the in-case transmission shaft 235 to turn the clutch on / off. The lead cam transmission clutch solenoid 231 is driven based on a control command from the control circuit 3.

  When the lead cam transmission clutch solenoid 231 is OFF according to a control command from the control circuit 3, the lead cam transmission clutch 232 can transmit the driving force from the planting transmission shaft 8 to the lead cam shaft 82 (transmittable). When the lead cam transmission clutch solenoid 231 is in the ON state, the lead cam transmission clutch 232 cannot transmit the driving force from the planting transmission shaft 8 to the lead cam shaft 82 (non-transmission state). is there.

  When the lead cam transmission clutch solenoid 231 is in the OFF state, a stepping motor clutch 242 described later connects the drive system (not shown) in the gear case 241 and the lead cam shaft 82 in accordance with a control command from the control circuit 3. Is in a disconnected state.

  The configuration including the lead cam transmission clutch 232 and the lead cam transmission clutch solenoid 231 according to the present embodiment is an example of the drive switching unit of the present invention. Further, the control circuit 3 of the present embodiment is an example of the control unit of the present invention.

  When the lead cam transmission clutch solenoid 231 is in the OFF state and in the ON state, the driving force in the planting transmission case 21 is transmitted as follows.

  First, when the lead cam transmission clutch solenoid 231 is in the OFF state, the lead cam transmission clutch 232 is in a state in which the driving force can be transmitted to the lead cam shaft 82. Therefore, the driving force input to the planting transmission case 21 is It is transmitted to the lead cam shaft 82 installed in the left and right lateral direction via a gear transmission mechanism in the auxiliary transmission case 21.

  The lead cam shaft 82 has a spiral groove 126 formed on the outer peripheral surface, and the lead claw 127 of the lead metal 124 is engaged with the spiral groove 126. The lead cam 82a to which the lead metal 124 is attached is pivotally supported on the lead cam shaft 82 so as to be slidable in the lateral direction, and both left and right end portions thereof are coupled to the seedling table 22. When the lead cam shaft 82 rotates, the lead pawl 127 moves along the spiral groove 126 of the lead cam shaft 82, and accordingly, the lead metal 124 and the lead cam 82 a move in the lateral direction, and the seedling stage 22 moves left and right. Reciprocate.

  Further, a pair of left and right end movement switches 250L and 250R for detecting that the seedling stage 22 has moved to the left and right ends of the section for storing the mat seedlings 28 are fixed to the seedling stage support frame 93. The detection result is sent to the control circuit 3.

  The reciprocating motion of the seedling stage 22 will be further described later with reference to FIG.

  Next, when the lead cam transmission clutch solenoid 231 is in the ON state, the lead cam transmission clutch 232 is in a state where transmission of the driving force to the lead cam shaft 82 is impossible, so the driving force input to the planting transmission case 21 is It is not transmitted to the lead cam shaft 82 installed in the left-right lateral direction via the gear transmission mechanism in the planting transmission case 21.

  The driving force input to the planting transmission case 21 is always transmitted to the seedling planting device 23 regardless of whether the lead cam transmission clutch solenoid 231 is in an ON state or an OFF state.

  Further, when the lead cam transmission clutch solenoid 231 is in the ON state, the driving force is not transmitted from the planting transmission case 21, and thus another driving force is supplied from the stepping motor 240 instead.

  That is, a stepping motor 240 is disposed in the vicinity of the outer end portion of the lead cam shaft 82, and the driving force is transmitted to the lead cam shaft 82 via the gear case 241.

  Further, the gear case 241 is provided with a stepping motor clutch 242, and whether or not the drive system (not shown) in the gear case 241 is connected to the lead cam shaft 82 according to a command from the control circuit 3. It is the structure which switches.

  The end movement switch 250 according to the present embodiment is an example of the end movement detection unit according to the present invention, and includes the stepping motor 240, the gear case 241, and the stepping motor clutch 242 according to the present invention. Is an example of a reciprocating drive unit. The configuration including the lead cam shaft 82, the lead cam 82a, the lead metal 124, the lead pawl 127, and the like according to the present embodiment corresponds to an example of the reciprocating mechanism of the present invention.

  In addition, the operation panel 2 of the riding type rice transplanter 1 according to the present embodiment is provided with a moving speed change switch 280 that changes the moving speed of the seedling platform 22 by changing the rotation speed of the stepping motor 240. According to the operation of the operator, the changed content is sent to the control circuit 3.

  Depending on the sowing density at the time of making the mat seedling 28 and the difference between the thick and thin seedlings depending on the growth stage, the seedling may not be taken as the set amount unless the rotation speed of the stepping motor 240 is changed. When the switch 280 is operated at that time, the speed at which the seedling planting part 15 moves to the left or right can be adjusted to the mat seedling 28, thereby preventing the amount of seedling from being disturbed or the seedling from being removed. However, there is a problem that a stock loss occurs.

  Also, when changing the width of a seedling picking claw 36 (see FIG. 4), which will be described later, or the seedling planting tool 27, the amount of seedlings can be adjusted by switching the moving speed change switch 280. It becomes.

  Further, the operation panel 2 is driven intermittently by the stepping motor 240, receives an instruction to artificially “sparsely plant” the seedling interval, and sends an output signal to that effect to the control circuit 3. A pseudo sparse planting instruction switch 260 is provided.

  In addition, the control panel 3 is instructed to control the rotational speed of the stepping motor 240 on the operation panel 2 in order to prevent the occurrence of seedling improper seedling due to a wrinkle that may occur in the mat seedling. A drought countermeasure instruction switch 270 is provided.

  The moving speed change switch 280 of the present embodiment corresponds to an example of the moving speed changing unit of the present invention, and the pseudo sparse planting instruction switch 260 of the present embodiment corresponds to an example of the sparse vegetative instruction unit of the present invention.

  Next, the configuration of the seedling planting device 23 in the riding type rice transplanter 1 according to the present embodiment will be described with reference to FIG.

  In FIG. 4, the partial cross section side view seen from the left side of the traveling vehicle body 10 of the seedling planting apparatus 23 is shown.

  A planting drive shaft 30 is rotatably supported at the rear end portion of the planting transmission case 21, and the center portion of the rotary case 31 is fixed to the left and right projecting portions of the planting drive shaft 30 so as to rotate integrally. It is attached.

  Furthermore, the planting rotation shaft 34 is rotatably supported by both ends of the rotary case 31 by the first bearing 32 and the second bearing 33, and seedling planting is performed on each of these two planting rotation shafts 34. The planting tool case 35 of the tool 27a (27b) is fixedly attached.

  The planting tool case 35 is provided with a seedling removing claw 36 as a seedling planting body and an extrusion rod 29 having a seedling extrusion claw 37 fixed to the tip.

  Further, in the rotary case 31, a non-rotating eccentric sun gear is arranged with one end side integral with the planting transmission case 21, and two eccentric counter gears meshed with the eccentric sun gear on both sides thereof, A gear mechanism (not shown) configured by two eccentric planetary gears meshed with each eccentric counter gear is housed.

  Further, the planting transmission shaft 30 penetrates the central portion of the eccentric sun gear while ensuring a rotatable clearance, and the eccentric planetary gear is configured to rotate integrally with the planting rotation shaft 34. Further, the extrusion cam 71 serving as a trigger for pushing out the seedling extrusion claw 37 at an appropriate timing is configured to be fixed to the rotary case 31.

  With the above-described configuration, the planting drive shaft 30 rotates by obtaining the driving force from the planting transmission case 21, so that the rotary case 31 rotates counterclockwise around the planting drive shaft 30 (see arrow A shown in FIG. 4). ), The planting tool case 35 rotates clockwise around the planting rotation shaft 34.

  Thereby, while the rotary case 31 rotates counterclockwise around the planting drive shaft 30, the tip 36a of the seedling picking claw 36 rotates counterclockwise along the static locus 19 shown in FIG. When the tip 36a passes through the seedling outlet 25 of the seedling receiving frame 20, it is separated and taken out one by one from the bottom row of the mat seedlings 28 supplied to the seedling mount 22, and planted in the field. is there.

  Next, the seedling feeding mechanism in the seedling planting unit 15 of the present embodiment will be described with reference to FIGS.

  FIG. 5 shows a cross-sectional side view for the purpose of easily explaining the seedling feeding transmission configuration of the seedling placing table 22 of the present embodiment, and FIG. 6 shows the seedling feeding of the seedling placing table 22 of the present embodiment. The front view for the purpose of explaining the transmission configuration in an easy-to-understand manner is shown.

  FIG. 6 is a view as seen from the back side of the seedling stage 22, and for the purpose of explaining the seedling feed transmission configuration in an easy-to-understand manner, the connecting portion between the drive side centered on the lead cam shaft 82 and the like and the seedling stage 22 Is shown separately.

  As shown in FIG. 6, the seedling planting portion 15 of the present embodiment has a six-row planting structure, and places a seedling transmission case 21 that also serves as a frame and a mat seedling 28 (see FIG. 2) to reciprocate left and right. While supplying the seedlings to the seedling collection port 25 of each row one by one, and supplying all the seedlings for one horizontal row to the seedling collection port 25, the seedling feeding belt 91 transfers the mat seedlings 28 downward to the seedling loading table 22 and the seedling collection port 25. A seedling planting device 23 (see FIG. 2) and the like for planting the supplied seedlings in a field with a seedling planting tool 27a (27b) are provided.

  The seedling mount 22 is supported on the back side of the seedling mounting surface so as to be movable in the left-right direction along a seedling receiving frame 20 provided in the left-right direction at the lower part on the back side. The seedling receiving frame 20 is provided with 6 seedling collecting openings 25.

  As shown in FIG. 6, the lead cam 82a is reciprocated left and right in the lateral direction by the power in the planting transmission case 21 protruding from the left and right sides of the planting transmission case 21 or the power of the stepping motor 240 (see FIG. 3). A lead cam shaft 82 is provided, the lead cam 82a and the seedling stage 22 are connected to each other, and the seed stage 22 is reciprocated in the left-right direction when the lead cam shaft 82 capable of forward and reverse rotation is driven to rotate. One end (left end) of the lead cam shaft 82 is supported by the planting transmission case 21.

  As shown in FIG. 5, an upper left / right moving guide member 95 and a lower left / right moving guide member 94 that are long in the left-right direction are fixedly provided on the upper and lower sides of the rear surface side of the seedling mount 22. The upper left / right moving guide member 95 is formed in a cross-sectional shape with the lower side cut out in a side view, and is associated with a rotatable support roller 92 supported from the lower side. A plurality of (four) support rollers 92 are provided at appropriate positions (four locations) along the upper left / right movement guide member 95, and the support roller 92 is attached to the upper side of the planting transmission case 21. Attached to the top.

  The lower left / right moving guide member 94 is placed on the seedling receiving frame 20 from above. Therefore, the seedling stage 22 is supported by the support roller 92 and the seedling receiving frame 20 so as to be movable in the left-right direction.

  The seedling stand support frame 93 is provided with left and right end movement switches 250L and 250R for detecting that the seedling stage 22 has reached the left and right end portions of the section for storing the mat seedlings 28. The switches 250L and 250R are configured to be detected by the left and right partition wall portions 251L and 251R projecting from the back side of the left and right end portions of the seedling mount 22 and extending vertically.

  Further, as shown in FIGS. 5 and 6, the seedling feeding belt 91 is wound around the driving roller 84 and the driven roller 85. The drive roller 84 is provided so as to rotate integrally with the seedling feed drive shaft 86 in the left-right direction. The seedling feed drive shaft 86 is provided for every two strips, and is configured to transmit the rotation only in the direction in which the seedling feed belt 91 feeds the seedling by each ratchet mechanism 87. Therefore, the seedling feeding belt 91 serves as a seedling transfer device that transfers seedlings on the seedling mounting table 22 to the seedling receiving frame 20 side at the left and right moving ends of the seedling mounting table 22.

  The drive mechanism of the seedling feeding belt 91 has the following configuration.

  That is, as shown in FIGS. 6 and 7, there are provided drive-side arms 88 that are driven to rotate in a configuration that protrudes from the left and right sides of the planting transmission case 21. The drive arm 88 on the right side of the planting transmission case 21 is driven to rotate via the lead cam shaft 82. In addition, a driven arm 90 is attached to every second position of the seedling feed drive shaft 86.

  With the above configuration, when the seedling stage 22 reaches the end of the left-right movement stroke, the driving side arm 88 hits the driven side arm 90 from below (see arrow B in FIG. 7A), and the rotation is It is transmitted to the seedling feed drive shaft 86 (see arrow C in FIG. 7A).

  It should be noted that the seedling mount 22 can transmit seedling feeding power at both left and right moving ends, and two driven arms 90 are provided at the left and right positions corresponding to one driving arm 88. When the driving side arm 88 moves away from the driven side arm 90, the driven side arm 90 returns to the position before driving by the tension of a torque spring (not shown) locked to the driven side arm 90.

  Next, the operation of the transmission mechanism by the driving side arm 88 and the driven side arm 90 will be described with reference to FIGS.

  7A to 7C are views for explaining the operation of the transmission mechanism by the driving side arm 88 and the driven side arm 90. FIG. 7A to 7C show side views when the driving side arm 88 pushes up the driven side arm 90 in order of time.

  The drive side arm 88 is a bifurcated arm in a side view, and is the arm that comes into contact with the driven arm 90, that is, the front side in the rotational direction of the lead cam shaft 82 (see arrow B in FIG. 7A). A driving upper roller 88a is provided at the tip of the arm, and a driving lower roller 88b is provided at the tip of the arm on the rear side in the rotational direction. The portions of the driving upper roller 88a and the driving lower roller 88b of the driving side arm 88 come into contact with the driven side arm 90 to push up and rotate the driven side arm 90.

  The driven arm 90 is also a bifurcated arm in a side view. As shown in FIGS. 7A to 7C, the driven upper arm portion 90a on the side that comes into contact with the driving arm 88 first is a side surface. Unlike the same wide shape as viewed, the driven lower arm portion 90b on the side that comes into contact with the drive side arm 88 later has a shape that becomes narrower toward the tip end when viewed from the side.

  As shown in FIG. 7A, with the rotation of the drive side arm 88, first, the drive upper roller 88a of the drive side arm 88 comes into contact with the driven upper arm portion 90a of the driven side arm 90 and pushes it up. The driven arm 90 is rotated around 86.

  When the drive side arm 88 further rotates, as shown in FIG. 7B, the drive lower roller 88b is moved to the driven lower arm before the engagement between the drive upper roller 88a and the driven upper arm portion 90a is released. After that, the driving lower roller 88b pushes up the driven lower arm portion 90b while the driving upper roller 88a and the driven upper arm portion 90a are disengaged, and the seedling feed driving shaft 86 is driven centered. The arm 90 is further rotated. Since the driving lower roller 88b contacts the driven lower arm portion 90b before the engagement between the driving upper roller 88a and the driven upper arm portion 90a is released, the driven side arm 90 continuously rotates without stopping. .

  When the drive side arm 88 further rotates, as shown in FIG. 7C, the engagement between the drive lower roller 88b and the driven lower arm portion 90b is released and the torque locked to the driven side arm 90 is obtained. The driven arm 90 returns to the position before driving by the tension of a spring (not shown), and the rotation of the driven arm 90 during seedling feeding is completed.

  That is, when the seedling stage 22 reaches the end of the left-right movement stroke, the drive side arm 88 hits the driven side arm 90 from the lower side, the seedling feed drive shaft 86 rotates, and the seedling feed belt 91 is moved. By operating only a fixed amount, the mat seedling 28 slides downward.

  Note that the seedling feed drive amount transmission mechanism of the present embodiment includes the driven side arm 90 by meshing the two driven upper rollers 88a and the driven lower rollers 88b with the two driven upper arm portions 90a and the driven lower arm portions 90b. The operating angle can be increased.

  Next, the seedling planting operation in the riding type rice transplanter 1 of the present embodiment will be described mainly with reference to FIGS.

  FIG. 8 is a diagram for explaining the relationship between the setting position of the inter-stock lever 123 and the operation status of each part.

  First, when the inter-strain lever 123 is set to the position of “normal planting” (50 to 70 strains) (see Example 1 in FIG. 8), it is as follows.

  That is, the control circuit 3 determines that the detection result from the inter-plant detection potentiometer 210 indicates the “normal planting” position, and outputs a control command to turn on the lead cam transmission clutch solenoid 231. Then, the lead cam transmission clutch 232 is operated in a state where the driving force from the planting transmission shaft 8 is not transmitted to the lead cam shaft 82 (non-transmittable state), and a control command is also output to the stepping motor clutch 242 to A drive system (not shown) in the case 241 is connected to the lead cam shaft 82.

  Further, at this time, the control circuit 3 receives the fact that the detection result from the inter-plant detection potentiometer 210 is “normal”, and in order to set the moving speed of the seedling platform 22 in the left-right direction to “normal speed”. The rotation speed of the motor 240 is set for “normal speed”.

  On the other hand, it is assumed that the worker who has checked the mat seedling has determined that there is a possibility of drowning, and has turned on the drought countermeasure instruction switch 270 (the drought countermeasure instruction switch in Example 1 in FIG. 8). See the column below).

  The control circuit 3 that has detected that the drought countermeasure instruction switch 270 has been turned on is provided with a stepping motor in order to prevent the occurrence of seedling improper seedling such as a missing stock state caused by drought that may occur in the mat seedling. The rotational speed of 240 is controlled.

  That is, the control circuit 3 reverses the seedling stage 22 by detecting that the seedling stage 22 has moved to the left and right end parts of the section for storing the mat seedlings 28 by the end movement switches 250L and 250R. When moving in the direction, the stepping motor 240 is controlled so that the moving speed of the seedling stage 22 is made higher than the normal speed, and after a predetermined time elapses, the normal speed is returned again. This control will be further described later with reference to FIG.

  In the “pseudo sparse planting” mode (see Example 2 in FIG. 8), the control circuit 3 can receive an instruction from the pseudo sparse planting instruction switch 260. In Example 1 in FIG. An example when the worker sets the pseudo sparse planting instruction switch 260 to OFF is shown.

  Moreover, in Example 1, since the inter-strain lever 123 is set at the position of “normal planting” (50 to 70 strains), the rotary case 31 obtains a driving force corresponding thereto from the planting transmission case 21, and “ Rotate at the speed of “Normal planting” mode.

  Thereby, generation | occurrence | production of the planting defect of seedlings, such as a missing stock state, can be prevented.

  Next, an example (see Example 2 in FIG. 8) in which the operator sets the inter-strain lever 123 to the position of “normal planting” (70 strains) and turns on the pseudo sparse planting instruction switch 260 will be described. . At this time, the control circuit 3 controls the “pseudo sparse planting” mode described below.

  At this time, in the rotary case 31, as in the case of Example 1 above, since the inter-strain lever 123 is set at the position of 70 strains of “normal planting”, the corresponding driving force is obtained from the planting transmission case 21. Rotate at 70 rpm.

  At this time, the control circuit 3 determines that the detection result from the inter-plant detection potentiometer 210 is set to 70 strains of “normal planting”, so that the moving speed in the left-right direction of the seedling stage 22 is set to 70. The rotation speed of the stepping motor 240 is set to 70 stocks for the stock (normal speed).

  On the other hand, the difference between Example 2 and Example 1 is that the control circuit 3 obtains a detection signal from the inter-strain detection potentiometer 210 and determines that the inter-strain lever 123 is at the position of 70 strains (“normal planting”). In addition, when the ON signal from the pseudo sparse planting instruction switch 260 is detected, the stepping motor 240 is intermittently driven.

  That is, in this second example, unlike the first example, the control circuit 3 performs normal rotation and rotation stop (or slow rotation) with respect to the stepping motor 240 to interlock with the movement of the seedling planting tools 27a and 27b. The control is repeated alternately. As a result, the stepping motor 240 stops rotating after one seedling planting tool 27a out of the two seedling planting tools 27a and 27b provided in one rotary case 31 stops the seedling. Since the table 22 does not move laterally, when another seedling planting tool 27b comes to collect seedlings for the mat seedling 28, seedlings are taken immediately before by the seedling planting tool 27a and there is no seedling. Go through the part. Thereafter, the stepping motor 240 starts normal rotation, and the seedling table 22 moves laterally. Next, when the seedling planting tool 27a comes to pick up the seedling, it passes through the portion where the seedling is present and the seedling is removed. I can take it.

  In other words, the seedling picking claws 36 provided in the seedling planting tools 27a and 27b can swing the work of actually taking the seedlings from the mat seedlings 28 every time. "Sparse planting" mode can be realized.

  Further, in Example 2, as in Example 1, it is assumed that the drought countermeasure instruction switch 270 is turned on, and the rotation speed control of the stepping motor 240 is performed as a countermeasure against the above-described drowning.

  Thereby, when the seedling placing stand 22 reciprocates, after one seedling planting tool 27a of the two seedling planting tools 27a and 27b attached to one rotary case 31 has taken the seedling, the other Since the seedling planting tool 27b can remove seedlings, the planting accuracy during sparse planting is improved.

  Next, when the inter-strain lever 123 is set to the position of “sparse planting” (37 to 47 strains) (see Example 3 in FIG. 8), it is as follows.

That is,
At this time, the control circuit 3 receives the fact that the detection result from the inter-strain detection potentiometer 210 is the “sparse planting” position, and changes the moving speed of the seedling stage 22 in the left-right direction to “sparse planting speed” Therefore, the rotation speed of the stepping motor 240 is set for “sparse planting speed”.

  Furthermore, in Example 3, since the inter-strain lever 123 is set to the “loose planting” position, the rotary case 31 obtains the corresponding driving force from the planting transmission case 21 and is used for the “sparse planting” mode. Rotates at the number of revolutions.

  On the other hand, in Example 3, the operator who inspected the mat seedling determines that there is a possibility of drowning, and turns on the drought countermeasure instruction switch 270 (Fig. 8, dripping in Example 3). Therefore, the same operation as in the above example is performed.

  Thereby, even in the “sparse planting” mode, it is possible to prevent the occurrence of planting failure of seedlings such as a missing stock state as necessary.

  However, in Example 3, as described above, the stepping motor 240 rotates at the rotation speed for the “sparse planting” mode. Therefore, the control circuit 3 detects that the seedling stage 22 has moved to the left and right ends of the section that stores the mat seedlings 28 by the end movement switches 250L and 250R. When moving in the reverse direction, the stepping motor 240 is controlled so that the moving speed of the seedling stage 22 is faster than the speed for the “sparse planting” mode, and after a predetermined time has elapsed, the speed for the “sparse planting” mode again. Repeat the control to return to.

  Next, when the inter-strain lever 123 is set to the “dense planting” (80 to 90 strains) position (see Example 4 in FIG. 8), it is as follows.

  In Example 4, unlike Example 1 to Example 3 described above, the reciprocating movement of the seedling stage 22 using the stepping motor 240 is not performed. This is because, in the case of “dense planting”, a considerable load may be applied to the motor and gear when the traveling speed is increased.

  That is, the control circuit 3 determines that the detection result from the inter-between detection potentiometer 210 indicates that it is in the “close planting” position, and outputs a control command to turn off the lead cam transmission clutch solenoid 231. The lead cam transmission clutch 232 is operated so that the driving force from the planting transmission shaft 8 is transmitted to the lead cam shaft 82 via the planting transmission case 21 (transmittable state), and the stepping motor clutch 242 is also controlled. A command is output to release the connection between the drive system (not shown) in the gear case 241 and the lead cam shaft 82.

  As a result, the driving force is transmitted to the lead cam shaft 82 via the gear mechanism in the planting transmission case 21 so that the reciprocating movement of the seedling stage 22 in the left-right direction can be realized. During dense planting work, the reciprocating movement of the seedling stage 22 is prevented from stagnation, and the seedling planting accuracy is improved.

  At this time, it is assumed that the operator who has checked the mat seedling determines that there is no possibility of wrinkling, and turns off the wrinkle countermeasure instruction switch 270 (see FIG. (Refer to the column of countermeasure instruction switch).

  Further, in Example 4, since the inter-strain lever 123 is in the “close planting” position, the control circuit 3 does not accept any instruction from the pseudo sparse planting instruction switch 260.

  Next, the movement of the mat seedling 28 on the seedling placing table 22 and the movement of the seedling planting tools 27a and 27b when the drought countermeasure instruction switch 270 is turned on will be described in more detail with reference to FIG.

  FIG. 9 is a schematic diagram for explaining the movement of the mat seedling 28 on the seedling table 22 and the movement of the seedling planting tools 27a and 27b when the drought countermeasure instruction switch 270 is turned on.

  In FIG. 9, the next movement is schematically shown for each step.

  That is, in the mat seedling 28, the two seedling planting tools 27a and 27b provided in one rotary case 31 are alternately rotated while the seedlings are taken sequentially from the right end to the left end of the bottom seedling. (See step S100 to step S102, arrow 501), until the position where all the horizontal rows of the lowermost seedlings (this is called the first row) is completely removed, that is, the seedling mounting table 22 is at the right end of the left-right movement process. When it reaches (see step S103), as described in FIG. 7, the seedling feeding belt 91 operates by a predetermined amount, and the mat seedling 28 slides downward on the surface of the seedling table 22 (see step S104, arrow 502). ). At this time, the second row arranged in a horizontal row above the first row has come to the lowest position (see step S104).

  Here, the wrinkling that occurs in the mat seedling 28 will be described.

  Although no wrinkle has occurred in the first row of seedlings shown in step S100 of FIG. 9, there are wrinkles 300L and 300R at both ends of the second row of seedlings shown in steps S103 to S104. It has occurred.

  Depending on the soil condition of the seedling cultivation soil and the tension of the roots, this drowning 300L, 300R occurs when the seedlings are sequentially taken by the seedling planting tools 27a, 27b, and is generated toward the center with the self-weight as the reference in the horizontal direction. This appears as a phenomenon in which the seedling gradually bends at the lower left and right sides or the lower left and right sides of the seedling 28 and a gap is generated. FIG. 9 shows a state where the mat seedlings 28 are drowned 300 L and 300 R on both the left and right strains.

  In FIG. 9, the area 400 for one stock of seedlings taken by the seedling planting tools 27a and 27b is shown by being separated by vertical solid lines in each row. A region 410 of the space after being taken is represented by a cross. Further, the lateral feed amount of the mat seedlings 28 is expressed with reference to the width w corresponding to the region 400 for one strain, and the lateral feed direction of the mat seedlings 28 is indicated by arrows 501 and 503. The direction in which the mat seedling 28 moves downward by the operation of the seedling feeding belt 91 is indicated by an arrow 502.

  Here, the description returns to each step of FIG. 9 again.

  First, for the purpose of facilitating understanding of the present embodiment, as a comparative example, the operation when no countermeasure is taken against drowning will be described as in the conventional configuration.

  That is, when the second row is moved to the lowermost stage in step S104, the rotation speed of the lead cam shaft that has started reverse rotation is not changed from the normal rotation speed. The seedling in the area with the width w at the left end is picked first, but since the dripping 300L is generated in the area with the width w at the left end, only a smaller amount of seedlings can be taken. Here, it is assumed that the width of the lower end portion of the twist 300L is about half of w. When the width of drowning is larger, it becomes a stock drop.

  On the other hand, in the configuration of the present embodiment, when the second row is moved to the lowest level in step S104, the end movement switch 250R provided on the seedling support frame 93 is also the right partition wall portion. At 251R, it is detected that the seedling stage 22 has reached the right side of the left and right moving ends, and a detection result indicating that fact is sent to the control circuit 3.

  Therefore, in step S105, as described in Example 1, since the worker has already turned on the dripping countermeasure instruction switch 270, a detection result indicating that the seedling stage 22 has reached the right side of the left and right moving ends has been received. The control circuit 3 moves faster than the normal moving speed (normal speed) of the seedling platform 22 corresponding to the “normal planting” position set by the inter-strain lever 123 in Example 1 with respect to the stepping motor 240. Rotate with With this control, when the seedling planting tool 27a first begins to take seedlings in the second row, it has already shifted to the right by a width of about 0.5 w from the left end as compared with the case described in the comparative example. ing.

  That is, one seedling planting tool 27a is adjacent to a region 401 having a width w where no wrinkle is generated, which is adjacent to the right side of the region 401L where the wrinkle 300L is generated (lower end width is about 0.5 w). Come to get seedlings (see step S105).

  At this time, not only the area 401 but also the seedling remaining in the area of the width role 0.5w adjacent to the left side is taken together by the one seedling planting tool 27a that has entered the area 401. Will not occur.

  Next, after the control circuit 3 increases the rotation speed of the stepping motor 240, the rotation speed detection sensor 220 that detects the rotation speed of the planting side output shaft 7a is connected to the planting side output shaft 7a, that is, connected thereto. When a signal indicating that the planted transmission shaft 8 is detected to make one rotation is obtained, a command to return the rotation speed of the stepping motor 240 to the speed obtained by subtracting the compensation speed α from the original normal speed is sent to the stepping motor. Output to 240.

  Here, the compensation speed α will be described. That is, in the present embodiment, the mat seedlings 28 can be obtained without drastically reducing the amount of seedlings taken per time from the set amount regardless of whether or not the control for changing the rotation speed of the stepping motor 240 is performed. The compensation speed α is set for the purpose of maintaining the number of seedlings taken per width at a constant value. That is, as described above, when the rotational speed of the stepping motor 240 is increased as a countermeasure against wrinkling, the mat seedling 28 is already 0. 0 in the first seedling removal in the second row compared to the normal speed. Since it has moved to the left by 5w, when removing seedlings in the area 402, simply return to the original normal speed, set the width of the area to w, and then continue the seedling removal operation with the width of the area set to w. The width from the last to the previous area is w, but the width of the last rightmost area is 0.5w instead of w, and there is a possibility that the amount of seedlings is drastically reduced.

  Therefore, in order to avoid this, instead of simply returning to the original speed, in order to set the movement amount of the seedling stage 22, that is, the width of the region 402 to an equal width of w−β narrower than w by β, The movement speed corresponding to this width is returned to the speed after compensation obtained by subtracting the compensation speed α from the normal speed.

  For example, if the mat seedling 28 has a horizontal width of 30 cm and the number of seedlings corresponding to the width is 24, the movement speed after compensation from the left region 402 to the rightmost region 403 (see step S107 in FIG. 9) is , (30-30 ÷ 24 × 1.5) ÷ 23≈1.22 (cm / time) per seedling removal, and the normal moving speed is 30 ÷ 24 = 1.25 (cm / time) This is a slight difference, and in the remaining 23 seedlings, it is possible to prevent the amount of seedlings from being drastically reduced from the set amount.

  Thereby, the other seedling planting tool 27b comes to collect seedlings for the region 402 of the width w−α adjacent to the right side of the region 401 (see step S106).

  Then, this seedling removing operation is repeatedly performed, and the seedling planting tool 27b picks up the seedling in the region 403 having the width w-α at the right end of the second row (see step S107).

  Here, when the mat seedling 28 moves to the left and the seedling planting tool 27b goes to the area 403 on the right end of the second row, the dripping 300R that has occurred on the right side of the second row Is gone. For this reason, in the present embodiment, control for changing the speed of the stepping motor 240 is not performed for the rightmost region 403 as a countermeasure against drooling.

  Then, until all the horizontal rows of seedlings in the second row have been removed, that is, when the seedling placing table 22 has reached the left end of the left-right movement stroke (see step S107), as described with reference to FIG. 91 operates by a predetermined amount, and the mat seedling 28 slides downward on the surface of the seedling table 22 in the same manner as described in step S104. At this time, as in step S104, the third row arranged in a horizontal row above the second row is at the lowest position.

  There are wrinkles 301L and 301R at the left and right ends of the third row (see step S107).

  Therefore, when the seedling planting tool 27a first goes to pick seedlings at the right end of the third row, the control circuit 3 uses the normal speed for the stepping motor 240 in the same manner as the countermeasure against wrinkles described in step S104. Rotate at a faster moving speed. With this control, when the seedling planting tool 27a starts to take seedlings for the first time in the third row, it has already shifted to the left by a width of about 0.5 w from the right end (see step S108).

  That is, one seedling planting tool 27a is adjacent to the region 404 of the width w where the wrinkle is not generated, adjacent to the left side of the region 404R where the wrinkle 301R is generated (the lower end width is about 0.5 w). Come to collect seedlings (see step S108).

  At this time, not only the region 404 but also the seedling remaining in the right side width 0.5w region 404R is taken together by the one seedling planting tool 27a that has entered the region 404. There will be no leftovers.

  Subsequent operations are the same as those in steps S106 to S107.

  Next, a configuration for automatically refueling the contact surface between the seedling placing table 22 and the seedling receiving frame 20 provided on the lower end side of the seedling placing table 22 will be described with reference to FIG.

  FIG. 10 is a schematic view showing an automatic oil supply mechanism.

  As shown in FIG. 10, the planting clutch on / off motor 600 is provided with a motor arm 601 that can rotate forward and backward, and in the vicinity of the motor arm 601, the planting clutch pin 121 a is interlocked with the operation of pushing the planting clutch pin 121 a. A rotation lever 640 that presses the oil supply head 651 of the automatic oil supply pump 650 and is rotatably supported by a lever rotation shaft 643 in the forward and reverse directions is provided.

  Since the one end portion 641 of the rotation lever 640 is connected to the push-up spring 630, a force that always rotates in the direction of the arrow 612 around the lever rotation shaft 643 is urged. Further, the other end side of the rotation lever 640 has a tip end portion 642 that extends to a position above the oil supply head 651 of the automatic oil pump 650, and an intermediate position between the lever rotation shaft 643 and the tip end portion 642. The part 645 is slidably connected to the rear end side of the planting clutch pin 121a in which the tip side is inserted into the planting clutch case 7. The oil supply head 651 is provided with an oil supply port 652, and one end of an oil supply tube 653 is attached to the oil supply port 652, and the other end of the oil supply tube 653 is connected to the seedling platform 22 of the seedling receiving frame 20. The receiving surface is fixed so that it can be lubricated.

  Thus, when the motor arm 601 rotates forward (see arrow 610 in FIG. 10), one end portion 641 of the rotation lever 640 rotates in the direction of the arrow 612, and the intermediate portion 645 is the rear end of the planting clutch pin 121a. 10 is moved in the direction of pushing in (see arrow 620 in FIG. 10) to place the planting clutch 121 in the “disengaged” state (that is, the planting operation is started). Since the head 651 is pressed in the direction of the arrow 622, a very small amount of lubricating oil is supplied from the oil supply port 652 to the seedling receiving frame 20 side via the oil supply tube 653.

  Further, when the motor arm 601 rotates in the reverse direction (see arrow 611 in FIG. 10), one end portion 641 of the rotation lever 640 rotates in the direction of arrow 613, and the intermediate portion 645 is on the rear end side of the planting clutch pin 121a. Is moved in a direction (see arrow 621 in FIG. 10) to place the planting clutch 121 in the “engaged” state (that is, the planting operation is stopped), and the tip 642 is a fueling head of the automatic fueling pump 650. Since it moves in a direction away from 651, refueling from the refueling port 652 is stopped.

  As a result, the automatic oil supply pump 650 can be operated in conjunction with the movement of the planting clutch pin 121a, so that oiling can be automatically performed only during the planting operation.

  In addition, the place which supplies oil is not restricted to the seedling receiving frame 20, For example, a raising / lowering link fulcrum may be sufficient.

  In this specification, the clutch engaged state refers to a state in which the clutch is disengaged and no power is transmitted from the engine, and the clutch disengaged state refers to a state in which the clutch is connected and the power from the engine is not transmitted. It shall be the state that is being transmitted.

  Next, another configuration for automatically refueling the contact surface between the seedling stage 22 and the seedling receiving frame 20 provided on the lower end side of the seedling stage 22 will be described.

  That is, in FIG. 10, although the structure which the automatic oil supply pump 650 act | operates in conjunction with the motion of the planting clutch pin 121a was demonstrated, it replaced with the planting clutch pin 121a, and was provided for each strip | line. A manual partial clutch on / off lever 700 (see FIG. 1) of a partial strip clutch (also referred to as a hook clutch) (not shown) that engages and disengages transmission of driving force to the seedling planting device 23. ).

  Accordingly, the automatic oil supply pump 650 is operated by setting the manual partial line clutch engagement / disconnection lever 700 to the disengaged state, and the automatic oil supply pump 650 is not operated by bringing the manual partial line clutch engagement / disconnection lever 700 to the engagement state. Control is possible.

  Next, instead of the automatic oil supply mechanism interlocked with the movement of the manual partial clutch engaging lever 700, FIG. 11 shows the configuration and operation of the automatic oil supply mechanism interlocked with the movement of the electric partial clutch switching mechanism 1070. This will be described with reference to FIG.

  In addition, in the said embodiment, although the riding type rice transplanter 1 to which the 6-row planting planting part 15 was connected was demonstrated, here, the riding type to which the 8-row planting planting part is connected The rice transplanter will be explained.

  First, the configuration and operation of a partial strip clutch that controls turning on and off of transmission of the driving force to the seedling planting device 1052 will be described.

  FIG. 11 is a block diagram showing a connection configuration of a partial strip clutch that controls on / off of transmission of driving force to the seedling planting device 1052 every two strips.

  In FIG. 11, the planting transmission case 1050 and the seedling planting device 1052 are viewed from above.

  A seedling planting device 1052 for planting seedlings for two strips is provided at each rear end portion branched into the four rear portions of the planting transmission case 1050. Here, these four seedling planting devices 1052 are arranged in order from the left side of the machine body, a first seedling planting device 1052a, a second seedling planting device 1052b, a third seedling planting device 1052c, and a fourth seedling planting device. It will be referred to as 1052d.

  At each rear end portion branched into four rear portions of the planting transmission case 1050, a portion for turning on and off the transmission of the driving force to the rotary case 1016 and the seedling planting tool 1054 provided at each rear end portion A strip clutch is provided, and the seedling planting operation for each seedling planting device 1052 for planting seedlings for two strips can be individually controlled. That is, the first seedling planting device 1052a, the second seedling planting device 1052b, the second partial strip clutch 1071b, the third partial strip clutch 1071c, and the fourth partial strip clutch 1071d, respectively, Driving force transmission to the third seedling planting device 1052c and the fourth seedling planting device 1052d is turned on and off.

  The first partial strip clutch 1071a, the second partial strip clutch 1071b, the third partial strip clutch 1071c, and the fourth partial strip clutch 1071d are respectively a first clutch wire 1072a, a second clutch wire 1072b, a third clutch wire 1072c, and a second clutch. The four-clutch wire 1072d is connected to the partial strip clutch switching mechanism 1070. When the first clutch wire 1072a, the second clutch wire 1072b, the third clutch wire 1072c, and the fourth clutch wire 1072d are pulled by the partial clutch switching mechanism 1070, the corresponding first partial clutch 1071a, second partial strip The clutch 1071b, the third partial strip clutch 1071c, and the fourth partial strip clutch 1071d are in the “on” state, and the corresponding first seedling planting device 1052a, second seedling planting device 1052b, third seedling planting device 1052c and the first The transmission of the driving force to the 4 seedling planting device 1052d is cut off.

  A switching dial 1073 for operating the partial clutch switching mechanism 1070 is disposed beside the steering handle 17, and the operator can operate the switching dial 1073 while sitting on the driver seat 16. Clutch switching control can be performed.

  Fig. 12 (a) shows a front view of the partial strip clutch switching mechanism 1070 viewed from the front side of the riding type rice transplanter, and Fig. 12 (b) shows a bottom view.

  On the near side of the switching mechanism support frame 1075, a first switching arm 1076, a second switching arm 1077, and a third switching arm 1078 are a first rotation fulcrum 1079, a second rotation fulcrum 1080, and a third rotation fulcrum, respectively. It is attached so as to be rotatable about 1081.

  The first switching arm 1076 is a ring-shaped member having a contact pin sliding hole 1084 formed in the upper part. The second switching arm 1077 and the third switching arm 1078 have an arc shape.

  These switching arms are arranged in the order of the first switching arm 1076, the second switching arm 1077, and the third switching arm 1078 in the front-rear direction from the front side.

  The ends of the first clutch wire 1072a and the fourth clutch wire 1072d are connected to the lower end of the first switching arm 1076.

  The second clutch wire 1072b is connected to the lower end of the second switching arm 1077, and the third clutch wire 1072c is connected to the lower end of the third switching arm 1078.

  12 (a) and 12 (b), in which none of the clutch wires is pulled, that is, the first partial clutch 1071a, the second partial clutch 1071b, the third partial clutch 1071c, and the fourth partial clutch. The state 1071d is “OFF”.

  When the first switching arm 1076 is rotated clockwise (clockwise) about the first rotation fulcrum 1079 from the state shown in FIG. 12A, the first clutch wire 1072a is pulled and the first partial strip is pulled. The clutch 71a is “ON”.

  On the other hand, when the first switching arm 1076 rotates counterclockwise (counterclockwise) around the first rotation fulcrum 1079 from the state shown in FIG. 12A, the fourth clutch wire 1072d is pulled, The 4-part clutch 1071d is “ON”.

  When the second switching arm 1077 and the third switching arm 1078 are also rotated clockwise as described above, the second partial strip clutch 1071b and the third partial strip clutch 1071c are “on”.

  On the back side of the switching mechanism support frame 1075, a fan-shaped continuous switching gear 1082 having teeth formed on arcuate edges is attached to be rotatable about a switching gear rotation fulcrum 1087.

  The teeth formed on the arcuate edge of the continuous switching gear 1082 mesh with the teeth of the switching mechanism driving gear 1083 that is rotated by the switching motor 1074. The continuous switching gear 1082 is rotated with the rotation of the switching mechanism driving gear 1083. Thus, it rotates around the switching gear rotation fulcrum 1087.

  An arm contact pin 1086 is erected at a position near the arcuate edge of the continuous switching gear 1082.

  A contact pin moving hole 1085 is formed at a position corresponding to the arm contact pin 1086 of the switching mechanism support frame 1075 so as to penetrate the arm contact pin 1086. The contact pin moving hole 1085 is an arc-shaped long hole with the switching gear rotation fulcrum 1087 as the center, and the arm contact pin 1086 moves in the contact pin moving hole 1085 when the continuous switching gear 1082 rotates. It has a configuration.

  The arm contact pin 1086 arranged so as to penetrate the switching gear rotation fulcrum 1087 has a length that also penetrates the contact pin sliding hole 1084 of the first switching arm 1076 arranged on the foremost side. .

  Therefore, when the arm contact pin 1086 moves as the continuous switching gear 1082 rotates, the arm switching pin 1086 moves while contacting and pushing the inner edge of the contact pin sliding hole 1084. Therefore, the posture of the first switching arm 1076 is changed to an arrow 1100. Change in the horizontal direction shown.

  Specifically, for example, when the continuous switching gear 1082 rotates counterclockwise from the state shown in FIG. 12A, the inner edge portion on the right side of the contact pin sliding hole 1084 is pushed by the arm contact pin 1086. Then, the upper part of the first switching arm 1076 is moved to the right. Since the first switching arm 1076 rotates about the first rotation fulcrum 1079, the first switching arm 1076 rotates clockwise and the first clutch wire 1072a is pulled.

  Under such a configuration, when the lower end of the first switching arm 1076 is directly below, the automatic fueling pump 650 pushes the fueling head 651 in the direction of the arrow 1101, and the first switching arm 1076 moves to the direction of the arrow 1100. Even if it moves to any direction, it arrange | positions in the position which does not push the oil supply head 651.

  Thus, automatic fueling can be performed in conjunction with the movement of the electric partial clutch switching mechanism 1070.

  The arm contact pin 1086 also changes the posture of the second switching arm 77 and the third switching arm 78 in the same manner as described above. However, the second switching arm 1077 and the third switching arm 1078 do not rotate at the same time because the position of the arm contact pin 1086 when the arm contact pin 1086 contacts is different. Therefore, the second clutch wire 1072b and the third clutch wire 1072c are not pulled simultaneously.

  Next, the folding mechanism of the seedling stand will be described with reference to FIGS.

  In the above embodiment, the riding type rice transplanter 1 provided with the six-row planting stand 22 has been described, but here, the riding type rice transplanter provided with the eight-row seedling placing stand. Will be described.

  FIG. 13 is a plan view of an 8-row riding rice transplanter 800, and FIG. 14 is a schematic diagram for explaining a folding mechanism of the seedling stand.

  In addition, the same code | symbol is attached | subjected to the same structure as FIG. 2, and the description is abbreviate | omitted.

  As shown in FIG. 13, the riding type rice transplanter 800 of the present embodiment serves as a seedling stage 822 in order from the left side, a first seedling stage 822a, a second seedling stage 822b, a third seedling stage 822c, There are provided a four seedling mounting base 822d, a fifth seedling mounting base 822e, a sixth seedling mounting base 822f, a seventh seedling mounting base 822g, and an eighth seedling mounting base 822h, and a pair of left and right seedling feeding belts 891 are provided respectively. It has been. Further, eight seedling planting devices 823 are arranged.

  Further, as shown in FIG. 14, the first seedlings located on the left and right ends of the back side of the seedling stage 822, on the upper rear side of the second seedling stage 822 b and the seventh seedling stage 822 g. A left seedling support base support frame 850L and a right seedling support base support frame 850R that support the support base 822a and the eighth seedling support base 822h, respectively, are fixed. It is configured to extend from the upper back corners of the back surfaces of the seedling platform 822a and the eighth seedling platform 822h while inclining to the upper side of the first seedling platform 822a and the eighth seedling platform 822h located at the left and right ends. is there. In addition, rotation support shafts 851L and 851R are provided at the tip portions of the left seedling support frame 850L and the right seedling support frame 850R, respectively.

  In addition, the left seedling support arm 852L and the right seedling support on which the front end portions 852La and 852Ra extend upward are provided on the upper rear surfaces of the first seedling support 822a and the eighth seedling support 822h, which are located at both left and right ends. The pedestal arms 852R are respectively fixed, and the tip portions 852La and 852Ra are respectively connected to the left seedling support base support frame 850L and the right side as indicated by arrows 860L and 860R in FIG. 14 via the rotation support shafts 851L and 851R. It is rotatably supported by the seedling support frame 850R.

  Further, the rotation support shafts 851L and 851R are spaced upward with respect to the upper left corner 822a1 and the upper right corner 822h1 of the first seedling platform 822a and the eighth seedling platform 822h located at the left and right ends. They are separated by E, and are located at positions that are separated by a distance D on the center side of the seedling stage 822, and D = E. That is, according to this configuration, the configuration is set on the left 45-degree line 865L and the right 45-degree line 865R extending from the upper left corner 822a1 and the upper right corner 822h1 shown in FIG.

  According to the above configuration, when the riding type rice transplanter 800 is stored, the operator sets the first seedling stage 822a and the eighth seedling stage 822h located at the left and right ends of the rotary support shafts 851L and 851R. By rotating them by 270 degrees in the directions of arrows 860L and 860R as the centers, they can be stored in front of the seedling stage 822 and obliquely above. At this time, the seedling feed belt side first end portion 870 and the seedling feed belt side eighth end portion 871 of the stored first seedling stand 822a and eighth seedling stand 822h are as shown in FIG. It fits in the facing position without a gap and does not overlap.

  Thereby, at the time of storage, the lateral width of the seedling stage 822 can be reduced, and the storage space can be reduced.

  In the configuration shown in FIG. 14, the seedling feed belt side first end 870 and the seedling feed belt side eighth end 871 of the stored first seedling stand 822a and eighth seedling stand 822h are mutually connected. Although it is configured to fit in a position facing each other without a gap and not to overlap, for example, the seedling feeding belt side first end 870 and the seedling feeding belt side eighth end 871 overlap each other vertically. There may be. As a result, the positions of the first seedling table 822a and the eighth seedling table 822h that are stored are stored closer to the center, so that the lateral width when the seedling table 822 is stored can be further reduced.

  Further, in the configuration illustrated in FIG. 14, the case where D = E has been described. However, the configuration is not limited thereto, and for example, D <E may be used.

  In the above-described embodiment, the configuration in which the lead cam shaft 82 can be switched by the stepping motor 240 or the planting electric case 21 can be switched. The lead cam shaft 82 may be rotated only by the stepping motor 240. With this configuration, a configuration relating to the switching mechanism is not required, and a seedling transplanting machine that enables the left and right reciprocating drive of the seedling mounting table with a simpler configuration can be provided.

  In the above-described embodiment, when taking a countermeasure against dripping, the moving speed of the seedling stage 22 is not simply returned to the original moving speed, but is returned to the compensated speed obtained by reducing the compensating speed α. Although not limited to this, for example, if there is no possibility that the amount of seedlings collected in the last left and right end regions of each row of mat seedlings 28 will be extremely reduced, it is possible to simply return to the original moving speed. good.

  Note that examples of “returning to the normal speed” of the present invention include both the example of the structure for returning to the speed after the compensation described above and the example of the structure for returning to the original speed without taking into account the compensation. .

  Examples of the “normal speed” of the present invention include the normal planting speed and the sparse planting speed described in Examples 1 to 3 of the above embodiment.

  Further, in the above-described embodiment, the left end moving switch 250L and the right end moving switch 250R detect that the seedling stage 22 has moved to the left and right ends of the section in which the mat seedlings 28 are stored. Thus, when the seedling stage 22 is moved in the reverse direction, the stepping motor 240 is controlled so that the moving speed of the seedling stage 22 is faster than the speed before the control. , Or the speed after compensation), a countermeasure against wrinkling that is performed on one end of the left and right ends of each row after the second row of the mat seedling 28 has been described.

  However, the present invention is not limited to this. For example, if there is a situation in which there is still wrinkling at the end of the row after the second row of the mat seedlings 28, the second row of the mat seedlings 28 and beyond. It is also possible to adopt a configuration in which a countermeasure against drowning is applied to both the left and right ends of each row. That is, the countermeasure against the wrinkle at the end portion on the side where the seedling is taken is applied by applying the concept of the compensation speed described above, based on the speed of the stepping motor 240 when the seedling stage 22 moves in the reverse direction. When the speed is made lower than this speed and then reduced again, the second compensation speed γ (α <γ) larger than the compensation speed α is reduced instead of subtracting the above-described compensation speed α from the original speed. It may be configured.

  Here, the second compensation speed γ is, for example, when the mat seedling 28 has a lateral width of 30 cm and the number of seedlings to be taken corresponding to the width is 24 times, the region where the 24th seedling is taken and the end of the mat seedling 28 And half of the width w (30 ÷ 24 (cm) = 1.25 (cm)) of the first seedling taking area in the row, that is, 0.5 w (0.625 (cm)) The width is set so as to leave a gap corresponding to the width (corresponding to the width in which the twist occurs). Thereby, it is possible to prevent the drowned portion from being included in the area of the mat seedling 28 where the 24th seedling is taken.

  As a specific example, when the second compensation speed γ is reduced, the movement speed per seedling removal from the second transition to the 24th transition of the row is {30-30 ÷ 24 × (1.5 + 0. 5)} ÷ 23≈1.20 (cm / time). Furthermore, since the control circuit 3 is configured to be able to determine from the detection result of the rotation speed detection sensor 220 that one of the seedling planting tools 27b has taken the 24th seedling, the control circuit 3 determines the determination. At the same time, a command to increase the rotation speed is issued to the stepping motor 240, the movement speed of the seedling stage 22 is increased, and the detection by the end movement switches 250L and 250R is quickly performed, and the other By the time the seedling feeding tool 27a comes to pick up the first seedling in the next row, the operation of the seedling feeding belt 91 is completed and the stepping motor 240 is rotated in the reverse direction, so that the same cocoon as described in step S108 above is obtained. This is a configuration for starting countermeasures.

  In this configuration, even if no wrinkle has occurred in the 0.5 w region at the extreme end of the mat seedling 28 adjacent to the 24th region, when the 24th seedling is taken, Since the seedling existing in the 0.5 w area at the extreme end is also taken together, no seedling is not left.

  In the above embodiment, the configuration in which the intermittent operation of the stepping motor 240 is combined with the countermeasure against the stagnation in Example 2 has been described. However, a configuration in which the squeeze countermeasure instruction switch 270 is not provided may be used.

  Further, in the above embodiment, as a countermeasure against dripping, when the moving direction of the seedling stage 22 is reversed, the rotation of the stepping motor 240 is performed when the seedling planting tool 27a starts taking seedlings in the first row. Explained the configuration in which the seedling stage 22 is moved to a position shifted by a width of about 0.5 w from the left or right end by increasing the speed by a predetermined amount as compared with the case where no countermeasure against dripping is performed. However, the present invention is not limited to this, and for example, the amount of deviation may be changed to a width other than 0.5 w by changing the amount of increase in the rotational speed of the stepping motor 240 in accordance with the state of occurrence of wobbling.

  Moreover, in the said embodiment, when moving the seedling mounting stand 22 in the reverse direction, it is assumed that there is always a wrinkle at the end of the mat seedling 28 (see the wrinkle 300L in step S105 in FIG. 9). The configuration for increasing the moving speed of the seedling stage 22 has been described.

  According to this configuration, even when the drought 300L does not exist, when the drought countermeasure instruction switch 270 is ON, the control for increasing the moving speed of the seedling platform 22 is uniformly performed. Even if it is carried out, since the deviation width of the seedling stage 22 is about 0.5 w as described above, for example, in step S105, one planting tool 27a went to the area 401 to take the seedling. At this time, since all the seedlings in the adjacent region 401L (here, it is assumed that no wrinkle is generated) are also dragged off, no seedling is not left.

  The transplanting machine according to the present invention can be applied to a seedling transplanting machine or the like that allows the right and left reciprocating drive of the seedling mounting table with a simple configuration, and can take only a smaller amount of seedlings than the set amount, or can completely remove seedlings. It can be applied to seedling transplanters that suppress the occurrence of missing stocks, and is highly industrially applicable.

10 traveling vehicle body 11 engine 12 front wheel 13 rear wheel 21 planted electric case 82 lead cam shaft

Claims (6)

Traveling vehicle body (2),
A seedling platform (22) provided at the rear of the traveling vehicle body (2), on which seedlings to be planted in a field are placed;
A seedling planting device (23) for planting seedlings on the seedling platform (22) in a field;
An inter-strain switching device (7, 115) for changing an interval between seedlings planted by the seedling planting device (23);
A stock-to-stock detection unit (210) that detects the change contents by the stock-to-stock switching device (7, 115),
Planting transmission mechanism (8, 21) for transmitting the driving force from the engine (11) provided on the traveling vehicle body (2) to the seedling planting device (23) via the inter-plant switching device (7, 115) When,
A reciprocating mechanism (82, 82a, 124, 127) for reciprocating the seedling stage (22) in the left-right direction;
A reciprocating drive unit (240) capable of switching between forward and reverse, which generates a driving force necessary for reciprocating movement of the reciprocating mechanism (82, 82a, 124, 127);
A seedling transplanter comprising: a control unit (3) for controlling the reciprocating drive unit (240) based on a detection result of the inter-strain detection unit (210). An end part movement detection unit (250L, 250R) for detecting that the seedling stage (22) has moved to the end part;
The control unit (3) detects that the seedling stage (22) has moved to the end part by the end part movement detection part (250L, 250R), and thereby the seeding stage (22) is moved. When moving in the reverse direction, the reciprocating drive unit (240) is controlled so that the moving speed of the seedling platform (22) is faster than the normal speed, and after a predetermined time has elapsed, the normal speed is returned to the normal speed. The seedling transplanter according to claim 1, wherein the seedling transplanter is characterized.   The seedling according to claim 1 or 2, further comprising a moving speed changing unit (280) for changing a rotating speed of the reciprocating driving unit to change a moving speed of the seedling platform (22). Transplanter. The planting transmission mechanism (8, 21) has a transmission shaft (8) for transmitting a driving force from the inter-plant switching device (7, 115),
A rotation speed detector (220) for detecting the rotation speed of the transmission shaft (8);
The control unit (3) detects that the seedling stage (22) has moved to the end part by the end part movement detection part (250L, 250R), and thereby the seeding stage (22) is moved. The passage of the predetermined time is determined based on the number of rotations of the transmission shaft (8) detected by the number-of-rotations detection unit (220) when moving in the reverse direction. The seedling transplanter described in 1. The seedling planting device (23) has one rotary case (31) and two seedling planting tools (27a, 27b) attached to the rotary case (31),
A sparse planting instruction unit (260) for outputting an instruction to execute sparse planting to the control unit (3);
The rotational speed of the rotary case (31) is set to a rotational speed corresponding to twice the rotational speed of the sparse planting, and when receiving the instruction from the sparse planting instruction unit (260), the control unit ( The seedling transplanting machine according to any one of claims 1 to 4, characterized in that 3) intermittently drives the reciprocating drive unit (240). A seedling stage transmission mechanism (8, 21) for transmitting the driving force from the engine (11) to the reciprocating mechanism (82, 82a, 124, 127) via the inter-plant switching device (7, 115);
The seedling stage transmission mechanism (8, 21)
A gear unit (21) for operating the reciprocating mechanism (82, 82a, 124, 127) by using a driving force from the engine (11);
A drive switching unit (230) for switching whether the reciprocating mechanism (82, 82a, 124, 127) is driven by the gear unit (21) or the reciprocating drive unit (240); ,
The control unit (3) controls the drive switching unit (230) to drive the reciprocating mechanism (82, 82a, 124, 127) by the gear unit (21) based on the output of the inter-stock switching device. The seedling transplanter according to claim 1, wherein the seedling transplanter is controlled.

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