JP2010035422A5 - - Google Patents

Description

Passenger type seedling planter

  The present invention relates to a passenger type seedling planter in which a seedling planting unit is connected to a work vehicle.

Of the wheels arranged on the left and right of the working vehicle by steering operation of the vehicle, the side clutch of the wheel inside the turning is disengaged, and based on the number of rotations of the wheel inside the turning, DESCRIPTION OF RELATED ART The riding type seedling planter provided with the turning interlocking | linkage control apparatus which performs a seedling planting operation automatically with the completion | finish of turning of the body which connected the part is known.
JP 2004-344020 A

  When the riding type rice transplanter disclosed in Patent Document 1 is used, the turning radius of the rice transplanter becomes large because the width of the fuselage is large, and it is necessary to intensify or loosen the degree of turning. There is a possibility that the seedlings can be planted in a state of being partially overlapped with the planting streaks which were planted in the immediately preceding step, even if application of the turning interlock control device disclosed in the above is not sufficient.

  Therefore, an object of the present invention is to provide a riding type seedling planter equipped with a swing interlock control device capable of planting seedlings at an appropriate position.

The above problems of the present invention are solved by the following solution.
The invention according to claim 1 comprises a transmission (21) to which power from an engine (12) is transmitted, left and right rear wheels (11) driven by an output from the transmission (21), and the rear wheels A side clutch (211) for turning on and off transmission to (11), a seedling planting unit (4) which can move up and down, a travel distance detection sensor (205) for detecting travel distance, and steering wheel (34) ) Is provided on the traveling vehicle body (2), and when the operating angle of the steering wheel (34) reaches a predetermined value or more, detection of the traveling distance is started by the traveling distance detection sensor (205), and the traveling distance becomes the first set traveling distance. The seedling planting section (4) is lowered when it reaches, and after that, when the traveling distance reaches the second set traveling distance, planting of seedlings is started by the seedling planting section (4). 11) Rolling the rolling frame There is provided a rolling angle sensor for detecting a ring angle, and if rolling on the left and right rear wheels (11) is frequently detected by the rolling angle sensor, control is performed to make corrections to reduce the first set travel distance and the second set travel distance. It is a riding type seedling planting machine characterized in that a device (163) is provided.

The control device (163) operates the notification device (186) when the travel distance reaches the first set travel distance, and the control device (163) does not return to the central position even if the steering wheel (34) is loosened. The vehicle type seedling planting machine according to claim 1, wherein the notification device (186) is operated when the traveling distance reaches the second set traveling distance .
In the invention according to claim 3, when the control device (163) detects the travel distance by the travel distance detection sensor (205), the travel distance detection sensor when the operation angle of the steering wheel (34) is equal to or less than a predetermined angle. It is set as the structure which interrupts detection of the traveling distance by (205), It is a riding type seedling planting machine of Claim 1 or Claim 2 characterized by the above-mentioned.
The invention according to claim 4 comprises a pitman arm (175) for transmitting steering operation from the steering wheel (34) to the front wheel (10), a follower (179) rotated by the pitman arm (175), and a follower ( Left and right rods (180) connected from 179) to the left and right side clutches (211) are provided, and the left and right intermittent operation cylinders (217) are provided at the middle part of the rod (180). Cylinder (217) is disposed on the left and right sides of the transmission case (12) and above the lower surface of the transmission case (12) and below the front wheel axle (13a) fixed to the left and right of the transmission case (12) The intermittent operation hydraulic solenoid valve (218) for operating the intermittent operation cylinder (217) is between the left and right front wheels (10) and in the transmission case. It is a riding-type seedling planting machine according to any one of claims 1 to 3, characterized in that arranged on the upper side of and the front wheel axle laterally (13a) of the 12).

According to the invention as set forth in claim 1, since the correction is made to reduce the first set travel distance and the second set travel distance in consideration of frequent rolling of the left and right rear wheels (11). The descent of the attachment portion (4) and the start of planting of seedlings can be performed at an appropriate timing .
According to the invention of claim 2, in addition to the effect of the invention of claim 1 , when operating the steering wheel (34) at the time of turning, the notification of the notification device (186) is a standard of the steering operation of the operator. , Even if it is a riding type seedling planter for multi-row planting such as eight-row planting, it is possible to turn along an appropriate traveling route, planting the seedlings in a state of partially overlapping with the planting bar planted in the last step. It is possible to turn in the field without fear of

According to the invention of claim 3, in addition to the effect of the invention of claim 1 or claim 2, when it is not possible to travel along the desired turning travel path, the seedling planting section (actual planting section) It can prevent that the descent | fall time of 4) and the planting start position of a seedling are controlled improperly.
According to the fourth aspect of the invention, in addition to the effect of the invention according to any one of the first to third aspects, the side clutch (211) is intermittently operated to turn the rear wheel (turning inside) 11) prevents the field from being roughened, and by turning the machine body at a desired turning radius, it is possible to properly and easily align the planting line of the next step after turning. In addition, the intermittent operation cylinder (217) prevents the interference from interfering with the intermittent operation cylinder (217) directly from above and below the vehicle body without lowering the minimum ground clearance of the vehicle, thereby preventing the interference operation. Damage to the cylinder (217) can be prevented. In addition, the intermittent operation cylinder (217) can be disposed between the left and right front wheels (10) so as not to interfere even when the front wheel (10) is steered, thereby achieving a compact airframe. Further, interference between the intermittent operation hydraulic electromagnetic valve (218) and the interference can be prevented, and breakage of the intermittent operation cylinder (217) can be prevented. Further, since the intermittent operation hydraulic solenoid valve (218) can be disposed utilizing the space on the side of the transmission case (12), the airframe can be made compact.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings.
1 and 2 are a side view and a plan view of a riding type seedling planting machine 1 which is a riding type rice transplanter equipped with a fertilizing device as a granular material delivery device according to an embodiment of the present invention. In the passenger type seedling planter 1 with this fertilization device, the seedling planting unit 4 is mounted on the rear side of the traveling vehicle body 2 via the elevating link device 3 so as to be able to move up and down. A body portion is provided.

  The traveling vehicle body 2 is a four-wheel drive vehicle provided with a pair of left and right front wheels 10, 10 as a driving wheel and a pair of left and right rear wheels 11, 11. A transmission case 12 is disposed at the front of the vehicle body. Left and right front wheels 13, 13 are provided on the left and right sides of the case 12, and left and right front wheel axles project outward from respective front wheel support portions capable of changing the steering direction of the left and right front wheel final cases 13, 13 Front wheels 10, 10 are attached respectively. The front end of the main frame 15 is fixed to the rear surface of the transmission case 12, and the rear wheel gear case 18 is supported by a rear wheel rolling shaft provided horizontally at the rear center of the rear end of the main frame 15. A rear wheel 11 is mounted on a rear wheel axle that is supported for rolling, and then protrudes outward from the wheel gear cases 18.

  The engine 20 is mounted on the main frame 15, and the rotational power of the engine 20 is transmitted to the transmission case 12 via a transmission 21 which is a belt transmission and a hydraulic transmission (HST) 23. The rotational power transmitted to the transmission case 12 is shifted by the transmission in the transmission case 12 and then separated into the traveling power and the externally extracted power and taken out. The traveling power is transmitted to the front wheel final cases 13 and 13 to drive the front wheels 10 and 10, and also via drive shafts 209 and 209 serving as left and right transmission shafts extending rearward from the rear surface of the transmission case 12. It is transmitted to the rear wheel gear cases 18 and 18 to drive the rear wheels 11 and 11. The left and right side clutches 211 and 211 and side brakes 212 and 212 are provided at the rear of the transmission case 12, and the drive shafts 209 and 209 are connected to the drive shafts 209 and 209 via the side clutches 211 and 211 and the side brakes 212 and 212. It is transmitted. The external extraction power is transmitted to the planting clutch case 25 provided at the rear of the traveling vehicle body 2 and then transmitted to the seedling planting unit 4 by the planting transmission shaft 26, and the fertilization device 5 by the fertilization transmission mechanism 28. It is transmitted to.

  The upper portion of the engine 20 is covered with an engine cover 30, and a seat 31 is installed thereon. In front of the seat 31, there is a front cover 32 which incorporates various operating mechanisms, and above it, a steering wheel 34 for steering the front wheels 10, 10 is provided. The lower end left and right sides of the engine cover 30 and the front cover 32 form a horizontal floor step 35. The floor step 35 is partially in the form of a grid (see FIG. 2), and the mud on the shoe of the worker who walks on the floor step 35 falls into the field. The rear part on the floor step 35 is a rear step 36 which doubles as a rear wheel fender.

  In addition, on the front left and right sides of the traveling vehicle body 2, the spare seedling stand 38, 38 on which the seedlings for replenishment are placed can be pivoted to a position projecting laterally beyond the machine and a position stored inside. It is provided.

  The lifting link device 3 has a parallel link configuration, and includes one upper link 40 and a pair of left and right lower links 41, 41. The upper link 40 and the lower links 41, 41 are rotatably attached to a rear view gate base link base frame 42 whose base side is erected at the rear end of the main frame 15, and the vertical link 43 Are linked. A connecting shaft 44 rotatably supported by the seedling planting unit 4 is inserted and connected to the lower end of the vertical link 43, and the seedling planting unit 4 is connected so as to be able to roll around the connecting shaft 44. An elevating hydraulic cylinder 46 is provided between a support member fixed to the main frame 15 and a tip of a swing arm (not shown) integrally formed on the upper link 40, and the elevating hydraulic cylinder 46 is expanded and contracted by oil pressure. As a result, the upper link 40 pivots up and down, and the seedling planting unit 4 is lifted and lowered with a substantially fixed posture.

  The seedling planting unit 4 is an eight-row planting structure, including a seedling plantation transmission case 50 which also serves as a frame, mats, and reciprocating left and right to supply seedlings to the seedling outlet 51a of each row by one share. When the whole row of seedlings is supplied to the seedling outlet 51a, ..., the seedling feeding table 51 which transfers the seedlings downward by the seedling feeding belt 51b, ..., the seedlings supplied to the seedling outlet 51a, ... are planted in the field A seedling planting device 52 to be attached is provided with a pair of left and right line drawing markers (not shown) for drawing the vehicle body course in the next stroke to the top soil surface. The seedling planting device 52 is provided with a plurality of seedling planting tools 126. At the lower part of the seedling planting part 4, a center float 55 is provided at the center, and middle floats 57 and side floats 56 are provided on the left and right sides thereof. When the center float 55, the middle float 57 and the side float 56 are in contact with the mud surface of the field, the center float 55, the middle float 57 and the side float 56 slide while leveling the mud surface. Seedlings are planted by the seedling planting device 52,. The floats of the center float 55, the middle float 57 and the side float 56 are rotatably attached so that the front end side moves up and down according to the unevenness of the soil surface on the surface of the field. Vertical movement is detected by an attack angle control sensor (not shown), and the hydraulic valve for controlling the elevating hydraulic cylinder 46 is switched according to the detection result to raise and lower the seedling planting unit 4 to plant the seedlings. Keep the depth constant at all times.

  Fertilizer 5 dispenses granular fertilizer stored in fertilizer hopper 60 by a predetermined amount by feeder 61, ... and mounts the fertilizer on center float 55, middle float 57 and side float 56 with fertilization hose 62, ... Guiding to the fertilization guide (not shown), ..., and dropping it into the fertilization structure formed near the side of the seedling planting strip by the grooved member (not shown) provided on the front side of the fertilization guide, ... It has become. The air generated by the blower 58 driven by the blower electric motor 53 is blown into the fertilization hose 62, ... via the air chamber 59 long in the left-right direction, and the fertilizer in the fertilization hose 62, ... is forced by the wind pressure. It is supposed to be transported to

  The seedling planting unit 4 is attached with a side rotor 27a and a center rotor 27b which are an example of the ground leveling device. In addition, the seedling loading stand 51 is configured to slide in the left-right direction with the support rollers 65a of the rectangular support frame 65 having the full width in the left-right direction and the vertical direction supporting the entire seedling planting part 4 as rails.

  The side rotors 27a and the center rotors 27b are supported by the following support structure. That is, the beam member 66 whose upper end is rotatably supported by both side members 65b of the support frame 65 of the seedling loading stand 51, the support arm 67 fixed to both ends of the beam member 66, and the support arm 67 rotate. A freely mounted rotor support frame 68 is provided, and at the lower end of the rotor support frame 68, a first drive shaft 70a and a second drive shaft 70b of the side rotor 27a and the center rotor 27b are mounted. Further, the lower end portion of the rotor support frame 68 is connected to a connecting member 71 rotatably mounted on the seedling planting transmission case 50.

  The center rotor 27b located in front of the center float 55 is disposed in front of the side floats 56 and the respective side rotors 27a located in front of the middle float 57 in relation to the arrangement position of the center float 55, the middle float 57 and the side float 56. There is. Therefore, power to the first drive shaft 70a of the side rotor 27a is transmitted from the gear in the rear wheel gear case 18 of the rear wheel 11, and to the second drive shaft 70b of the center rotor 27b is the first drive shaft 70a of the side rotor 27a. Power is transmitted from the inner end of the vehicle.

  The center rotor 27 b is suspended via a second spring 78 by a first link member 76 and a second link member 77 whose upper end is supported by the beam member 66.

  Further, a bending plate 82 is fixed to the lower end portion of the rotor vertical position adjusting lever 81, and the bending plate 82 is rotatably supported by the support frame 65. When the rotor vertical position adjustment lever 81 is turned in the left and right direction of the vehicle, the projection 66a is fixedly supported by the beam member 66 rotatably supported by the side members 65b of the support frame 65. The bending plate 82 pivots up and down near. The bent plate 82 locks the lower part of the projecting part 66a, so that the projecting part 66a pivots upward about the beam member 66 in the rightward rotation of the rotor vertical position adjusting lever 81. . The end of the first link member 76 opposite to the connecting portion with the beam member 66 is also pivoted upward about the beam member 66 by the rotation of the protrusion 66 a. By turning the first link member 76 upward, the center rotor 27b can be raised upward via the second link member 77 and the second spring 78. When the center rotor 27b is moved upward, the side rotor 27a is simultaneously moved upward via the second drive shaft 70b and the first drive shaft 70a.

  In addition, since the rotor vertical position adjustment lever 81 is provided substantially at the center of the traveling vehicle body 2, it is easy to balance the left and right when the side rotor 27a and the center rotor 27b are moved up and down.

  Moreover, when the seedling planting part 4 is lowered to the field, the cable 45 for returning the seedling planting part 4 to the horizontal position is obtained from the first link member 76 and the second link member 77 of the center rotor 27b and the second spring 78 etc. The lift spring portion and the lift hydraulic cylinder 46 are interlocked with each other.

  Thus, the center rotor 27b can be returned to the horizontal position every time the seedling planting unit 4 is lowered from the raised position by providing the cable 45 in addition to the swing mechanism by the second spring 78 etc. of the center rotor 27b. The holding position of the center rotor 27b can be stabilized.

  The rotational power of the engine 20 is transmitted to the hydraulic transmission 23 through the transmission 21 and the like, and the output from the hydraulic transmission 23 is transmitted to the input shaft (not shown) of the transmission case 12 through a belt (not shown). Reportedly.

  The seedling planting unit 4 is mounted on the main frame 15 of the traveling vehicle body 2 so as to be able to move up and down by the elevating link device 3. The configuration for raising and lowering the planting unit 4 will be described. First, a hydraulic pump (shown in FIG. 1) is provided on the traveling vehicle body 2 by connecting the upper end of the piston of a general lifting hydraulic cylinder 46 (FIG. 1) whose base is rotatably provided on the traveling vehicle body 2 (FIG. 1) ) To supply pressure oil to the elevating hydraulic cylinder 46 or to discharge pressure oil from the elevating hydraulic cylinder 46 to extend or retract the piston of the elevating hydraulic cylinder 46 and connect the seedlings to the elevating link device 3 The planting unit 4 is configured to move up and down.

  Here, a configuration of a portion where the front wheels 10, 10 are steered by the steering wheel (steering wheel) 34 will be described based on FIG. 3 and FIG.

  The steering wheel 34 is fixed to an upper portion of a steering shaft provided in the front cover 32, and the rotation of the steering shaft is decelerated via a steering transmission gear provided in the transmission case 12 and transmitted to the output shaft 174. . The lower end of the output shaft 174 protrudes from the bottom of the transmission case 12 and the pitman arm 175 is fixed. The front left and right sides of the pitman arm 175 and the left and right front wheel final cases 13 and 13 (FIG. 1) are connected by left and right rods 176 and 176 (FIG. 4).

  Therefore, when the steering wheel 34 is turned, it is transmitted to the steering shaft, the steering transmission gear, the output shaft 174, the pitman arm 175, the left and right rods 176 and 176, and the left and right front wheel final cases 13 and 13, and the left and right front wheels 10, 10 is steered to the left and right.

  The right arm 171R, which operates by stepping on a pedal (not shown), is welded and fixed to the right end of the counter shaft 170. The left arm 171L is fixed to the left end of the counter shaft 170 by welding. Furthermore, the left connecting rod 172L and the right connecting rod 172R are provided rearward from the lower part of each of the right arm 171R and the left arm 171L, and the rear ends of the left connecting rod 172L and the right connecting rod 172R are the left and right side brakes 212, respectively. , 212 are connected to left and right brake operating arms 86J and 86J for operating left and right shifters 85J and 85J.

  On the other hand, on the upper surface of the rear portion of the pitman arm 175, an actuating roller 177 is rotatably provided, and a notch 178 cut in a U-shape in plan view to surround both left and right sides of the actuating roller 177 is A follower 179 is rotatably supported on the bottom surface of the transmission case 12. The left and right side portions of the follower 179 are connected to the front portions of the left and right second rods 180 and 180 connected to the left and right clutch operation arms 861 and 86I. Therefore, when the handle 34 is turned to the right by more than a predetermined amount (the amount by which the operator turns to the right with the intention to turn the machine to the right), the pitman arm 175 also rotates to the right, and the actuating roller 177 moves in the (c) direction. In order to turn and push the left side 178a of the notch 178 of the follower 179, the follower 179 is turned in the direction (ii) and the right second rod 180 is pulled, and the right clutch operating arm 86I is operated As the right side clutch 211 is disengaged and the right rear wheel 7 on the turning center side is idled, the right rear wheel 7 lifts the mud a large amount without damaging the plough and roughens the mud surface. You can make a right turn smooth and clean without having to

  Conversely, when the handle 34 is turned to the left by more than a predetermined amount, the pitman arm 175 also rotates to the left, the actuating roller 177 rotates in the opposite direction, and the right side surface 178b of the notch portion 178 of the driven member 179 In order to push, the follower 179 is rotated in the opposite direction, the left second rod 180 is pulled, the left clutch operating arm 86I is operated, the left side clutch 211 is disengaged, and the left on the turning center side Because the rear wheel 11 is idled, the left rear wheel 11 does not damage the tillage, nor does it lift a lot of mud and roughen the mud surface, so the left turn is smooth and smooth. You can clean it.

  Furthermore, left and right sensor pressing plates 182, 182 are provided on the upper surface of the front of the pitman arm 175, and the auto lift switch fixed to the bottom of the transmission case 12 when the handle 34 is rotated either left or right by 200 degrees. 183 turns on (handle 34 rotates up to 360 degrees to 400 degrees left and right).

  The pitman arm 175, the left and right rods 176 and 176, the actuating roller 177, the notch 178, the follower 179, the second rod 180, the left and right sensor pressing plates 182 and 182, and the auto lift switch 183 shown in FIGS. It will be referred to as a swing connection mechanism A.

  In the embodiment described above, an example has been shown in which the side clutch 211 of the rear wheel 11 inside the turning is turned off by the operation of the steering wheel 34 at a predetermined angle or more, but a side clutch switch is provided on the control panel 33 provided in the work monitoring device Alternatively, the side clutch 211 may be manually turned off. Alternatively, the side clutch 211 may be configured to be able to manually “turn off” the side clutch 211.

  Accordingly, when the vehicle turns, the side clutch 211 is turned off, and as the vehicle turns, the ground is connected to the field, but the number of rotations of the rear wheel 11 that turns inside (turning inside of the rear wheel 11 If the travel distance is calculated based on the detection of the number of rotations of the drive shaft 209, it is less susceptible to slips and the like than the wheels being driven, so that the travel distance can be accurately calculated, and optimal automatic turning control It can do. Therefore, the rotation detection gears 210, 210 are fixedly provided on the drive shafts 209, 209 of the left and right rear wheels 11, 11, respectively, and the number of rotations of the rotation detection gears 210, 210 It is configured to be detected by the travel distance detection sensors 205, 205 serving as sensors.

  The travel distance detection sensor 205 is provided on the upper surface portion of the transmission case 12 so as not to protrude left and right from the transmission case 12. This is because the left and right front wheels 10, 10 are disposed on the left and right of the transmission case 12, and thus the travel distance detection sensor 205 is provided on the upper surface of the transmission case 12 If the left and right front wheels 10 and 10 are steered, the steering angle can be increased, and a small-sized airframe with a small turning radius can be obtained, which is optimal. Can turn the aircraft. Furthermore, since the traveling distance detection sensor 205 is provided on the upper surface portion of the transmission case 12, the adhesion of mud to the traveling distance detection sensor 205 is reduced, the durability is improved, and the turning control of the airframe described later is performed. It can be done well over the long term.

  Next, a control configuration for automatically raising the seedling planting unit 4 at the time of reverse travel will be described. First, as shown in FIG. 6, when the change lever 90 (forward and reverse lever) is operated in reverse, the contact plate 190 provided on the base of the change lever 90 abuts on and a back lift switch 191 is provided. Control the electromagnetic solenoid which operates the electromagnetic hydraulic valve 161 by the seedling planting device raising means of the control device 163 (FIG. 7) to raise the seedling planting part 4 to the maximum position by the raising and lowering hydraulic cylinder 46 Is configured.

  As described above, if the seedling planting unit 4 is automatically raised to the maximum position when the change lever 90 is operated in reverse, the machine is rotated to turn the machine on the edge of the field, etc. Since the seedling planting part 4 is automatically raised to the maximum position when moving backward toward the weir, the seedling planting part 4 can be prevented from colliding with the weir and can be prevented in advance, so that the workability is good.

  Further, when the auto lift switch 183 shown in FIG. 6 is turned on when the handle 34 is turned to the left or right by 200 degrees, an electromagnetic solenoid that operates the electromagnetic hydraulic valve 161 by the seedling planting part raising means of the control device 163 It controls so that the seedling planting part 4 may be raised to the maximum position by the raising / lowering hydraulic cylinder 46. As shown in FIG.

  As described above, when the handle 34 is rotated to the left or right as much as possible in order to turn the machine at the moment, the auto lift switch 183 is turned ON, and the seedling planting unit 4 is automatically raised to the maximum position Therefore, the operation for raising the seedling planting part 4 at the time of turning of the machine becomes unnecessary, the turning of the body can be performed efficiently, and the workability is good.

  On the other hand, the control panel 33 is provided with an automatic lift changeover switch 192 (FIG. 6) for switching between a state in which the seedling planting unit 4 is automatically lifted and a state in which the seedling planting unit 4 is not lifted. When the back lift switch 191 is turned on or the auto lift switch 183 is turned on as described above, the seedling planting unit 4 is automatically raised by the seedling planting device raising means of the controller 163. Be done. When the automatic lift changeover switch 192 is turned off, the seedling planting unit 4 is not automatically lifted even if the automatic lift switch 183 is turned on even if the back lift switch 191 is turned on.

  As described above, even if the back lift switch 191 is turned on by one automatic lift switching switch 192, the seedling planting unit 4 can not be automatically lifted even if the auto lift switch 183 is turned on. The configuration is simpler than the configuration in which the switches for turning on and off each of the back lift and the auto lift are separately provided, and the state switching of the both can be performed with one switch.

  If the seedling planting unit 4 does not automatically lift even if the automatic lift switch 183 is turned on even if the automatic lift changeover switch 192 is turned off and the back lift switch 191 is turned on, the machine reverses. Since the seedling planting unit 4 does not automatically rise even if the change lever 90 is operated at a reverse speed when it becomes a barn, etc., it is possible to move backward while the seedling planting unit 4 is lowered. It is possible to avoid the situation where the planting section 4 is hit to other members of the above. In addition, when planting around along the edge of a fan-shaped or gourd-shaped deformed field, planting work is performed while turning the handle 34 along the curved ridge. At this time, the automatic lift changeover switch 192 If the automatic position is set, the seedling planting unit 4 will automatically rise when the handle 34 is turned to the left or right by more than 200 degrees, and the planting operation can not be performed, but if the automatic lift switch 192 is turned off Since the seedling planting unit 4 does not ascend even if the handle 34 is rotated by more than 200 degrees to the left or right, the planting work can be performed and the seedling planting work can be appropriately performed even in a modified field.

  Further, in the passenger type seedling planting machine 1 configured as described above, the control device 163 of the present embodiment automatically performs various operations such as planting of seedlings at the time of turning based on the detection of the rotation speed of the rear wheel 11 inside the turning. It is possible to perform turn interlock control to be performed. In particular, when the rear wheel 11 inside the turning is steered by a predetermined angle or more, the turning interlock control can be performed.

  The concept of this control is shown in FIG. 8 and FIG.

  That is, when the steering wheel disconnection angle sensor 193 detects that the steering wheel 34 is operated at an operation angle equal to or larger than a predetermined value in which the steering wheel 34 is turned and the side clutch 211 of the rear wheel 11 inside the turning is disengaged. Detection of the number of rotations of the drive shaft 209 inside the turning is started by the traveling distance detection sensor 205 which becomes a number sensor, and when the transmission shaft rotation number of the inner rear wheel 11 exceeds the set value N1 when turning Lower 4 Thereafter, the transmission shaft rotational speed of the rear wheel 11 is in the “off” state with the set value and the operation of the seedling planting tool 126 (from the seedling planting device 52 moved to the raised state) to the start of the cutting operation of the handle 34 It is a mechanism which makes planting "enter" when it becomes more than the total value of the rotation speed n of the transmission shaft of the rear wheel 11.

The flow of the swing interlock control is shown in FIG.
First, the number of rotations of the transmission shaft of the left and right rear wheels 11, 11 is detected by the travel distance detection sensor 205, and the first set number of rotations N1 (the inner drive shaft 209 rotation signal from the start of turning to turning of the aircraft 90 °) Set value), second set rotational speed N2 (Inside drive shaft 209 rotation signal set value while traveling the distance (b) from turning start in Fig. 9 to 180 degrees turning to planting "enter")) , Θ1 ((lower limit of steering wheel setting angle at the time of straight operation)), θ2 (upper limit of steering wheel setting angle at the straight operation).

  Next, in order to cope with differences in field conditions such as field hardness, depth of water, depth of plowing, etc., each setting of the first set rotational speed N1, second set rotational speed N2 and handle turning angle θ1, θ2 The correction value n0 is set by the setting dial 206a of θ1 adjusting the value, the setting dial 206b of θ2, the setting dial 208a of N1, and the setting dial 208b of N2 (FIG. 7).

  Whether or not the seedling planting tool 126 of the seedling planting part 4 is in the planting state of the seedling is detected in the state of the control device 163 accompanying the operation of the finger lever 166, and from planting "on" to planting "off" When it becomes, the number of rotations n of the transmission shaft of the rear wheel 11 from when the operation of the seedling planting tool 126 enters the "enter" state until the operation of the seedling planting tool 126 becomes the "off" state And the value (n) is stored. Then, the steering angle .theta. Of the steering wheel 34 is detected by a steering wheel turning angle sensor (potentiometer) 193 (FIG. 7) provided on the shaft of the steering wheel 34, and right and left except when traveling straight (.theta.1 <.theta. <. Theta.2). It is detected in which direction it is turning.

  When turning the riding type seedling planter 1 in order to plant the seedlings on the next planting strip at the end of the field etc., turn the handle 34 to turn off the side clutch 211 of the rear wheel 11 inside the turn and back When the number of revolutions of the drive shaft 209 of the wheel 11 reaches the first set number of revolutions N1 from the turning start time when the steering wheel 34 is operated to the operation angle equal to or more than the predetermined value (shown in FIG. Travels a distance of 90 degrees from the start of turning according to the traveling path, travels a long distance) the notification device 186 configured by a buzzer, strongly turns the handle 34, and turns the body 90 degrees.

  If the number of rotations of the transmission shaft of the left rear wheel 11 is detected while turning left and the number of rotations n1 becomes n1 N N1 + n0, the machine will turn 90 degrees or more from the start of turning, so the seedling planting section Lower 4 The lowering of the seedling planting part 4 flattens the headland. In addition, after turning the vehicle 90 degrees, stop the ringing of the notification device 186, and move forward while loosening the turning degree of the handle 34, and the rotation speed n2 of the drive shaft 209 of the left rear wheel 11 is n2 N N2 + n + n0 (When traveling at a second set rotational speed N2, travel the distance (b) during a 180 degree turn from the turning start in FIG. 9), ring the notification device 186 long and strongly rotate the handle 34 again to make the machine Rotate 90 degrees. After turning the aircraft by 90 degrees, the ringing of the notification device 186 is stopped, the steering 34 is advanced while advancing the degree of turning of the steering wheel 34 to travel distance (b) + (c), and the turning of 180 degrees is completed. At this time, the turning shown in FIG. 10 is completed, and the planting clutch “enter” is performed at the second set rotational speed N2, and the seedling planting tool 126 is operated to start planting of the seedling. Thus, planting of the seedlings is started at a position aligned with the planting end position of the previous process.

  In addition, after the rotation speed of the drive shaft 209 of the rear wheel 11 reaches the first set rotation speed N1 from the start of rotation and the notification device 186 is ringed to turn the handle 34 90 degrees, the turn of the handle 34 is loosened Even if the distance does not return near the center, the next long interval between ringing of notification device 186 is shortened, and the rotation speed of drive shaft 209 of rear wheel 11 is reduced even if travel distance (b) is shortened. When the second rotation number N2 is reached from the start of turning, the notification device 186 is ringed long, and the steering wheel 34 is turned again by 90 degrees.

  Also, instead of the notification device 186, the pilot is notified by a blinking or voice of the center mascot 29, for example, "Please return the steering wheel", "Please cut the steering wheel and adjust the alignment", etc. to make the turning operation It may be good.

  In this way, even if it is a riding type seedling planter for multi-row planting such as eight-row planting, turning in the field becomes possible without fear of planting seedlings in a state where it partially overlaps with the previous planting strip.

The same control as in the case of the left turn is performed also in the case of the right turn.
During the swing control, the hydraulic sensitivity of the raising and lowering hydraulic cylinder 46 of the seedling planting unit 4 is desensitized (does not switch to the rising side) from “lower” of the seedling planting unit 4 to “enter” of the seedling planting unit 4 It is desirable to bring the center float 55 or the like to the front rising state by putting it in the) state. This can be done by setting the control target of the center float sensor 169 so that the center float 55 is in the front rising state, and turning the center float 55 in the front rising state makes it possible to even out the turning trace, and the pillow Earth treatment can be done easily and accurately.

  As described above, in order to detect the rotational speed of the drive shaft 209 of the rear wheel 11 in which the side clutch 211 is disengaged, it is characterized by being less susceptible to the influence of slip or the like compared to the rotational speed detection of the rear wheel 11 transmitting power. is there. In addition, since the rotational speed of the drive shaft 209 which rotates faster than the rear wheel 11 is detected, the measurement accuracy can be easily increased. As a result, there is an effect that the beginning of planting of the seedlings for each planting stripe becomes almost constant (the headland width (D) is constant).

  Further, the start button (switch) 184 of the turning control for performing various operations of the series of turning control shown in FIG. 10 may be used also as a button for setting the start position of the seedling planting.

  Thus, forgetting of the button operation can be prevented by using both the button for setting the start position of the seedling planting and the start button 184 for turning control for performing various operations of the above-mentioned turning control. .

  Generally, the operation speed of the seedling planting tool 126 of the seedling planting device 52 is set to be constant so that the planting intervals (between strains) of the seedlings are equally spaced, for example The working speed of the seedling planting tool 126 is slower than at the time of planting planting at the time of working other than planting planting, so it will plant seedlings at an irregular speed, and the planting of the seedling by planting planting tool 126 pulsates ( Unstable movement that causes vibration. At this time, when the vehicle speed is high, the vibration of the traveling vehicle body 2 caused by the roughening of the weir scene is added to the pulsation of the seedling planting tool 126, and the pulsation is amplified.

  Therefore, in the present embodiment, the shift lever 16 and the planting clutch case for shifting the vehicle speed shown in FIG. 11 are configured to be able to perform the loose porting by selecting the appropriate speed gear of the sub transmission (not shown). As shown in the diagram for explaining the connection relationship of the sparse replanting standard planting switching lever 118 which operates the No. 25, the dotted planting position is operated in the arrow A direction of FIG. 11 from the sparse planting side of solid line When it is moved to the standard planting side, the gear shift shifter (not shown) projecting from the planting clutch case 25 provided with the pivot base of the sparse grafting standard planting switching lever 118 is operated, and the gear shift shifter is used. A gear mechanism (not shown) in the planting clutch case 25 changes the seedling planting interval of the seedling planting tool 126 from the sparse planting side to the standard planting side.

  At the same time, the vehicle speed regulating plate 47 connected to the other end of the second cable 119 via the second cable 119, one end of which is connected to the rotation base of the segregating standard planting switching lever 118, centers the rotation fulcrum 47a. By moving in the direction of arrow B in FIG. 11, the shift lever 16 can be moved to a higher speed side.

  This is because the shift lever 16 can be moved to a higher speed side along the lever guide hole 16c of the shift lever guide plate 16b supported by the body with the pin 16a protruding from the rotation base of the shift lever 16 is there.

  However, the end of the vehicle speed regulating plate 47 on the side opposite to the connecting portion with the second cable 119 with respect to the pivot point 47a of the vehicle speed regulating plate 47 is always the spring 48 supported by the airframe, as shown by arrow B in FIG. In the opposite direction, when the sparse-planted standard planting switching lever 118 moves to the loose-planted side of the solid line and when the second cable 119 is disconnected, the hook portion of the tip of the vehicle speed regulating plate 47 is shifted The pin 16a protruding from the rotation base of the lever 16 is locked, the rotation of the speed change lever 16 is restricted so that the vehicle speed is on the deceleration side, and the traveling safety can be maintained.

  As shown in the side view of the lower end portion of the seedling loading stand 51 of FIG. 12 (a) and the plan view of the lower end portion of the seedling loading stand 51 of FIG. 12 (b) A shaft 51d is provided for guiding the seedling of the surface seedbed supported by the joint 51c provided on the side walls on both sides of the mounting table 51 upward. A circular plate is attached to one end of the shaft 51d. The shaft 51d can be taken out of the joint 51c and used as a scraping rod due to the fertilizer clogging in the residual fertilizer collecting pipe (horizontally long) of the fertilizing device 5.

  As shown in the rear view of the seedling loading stand 51 part of FIG. 13 (a) and FIG.13 (b), the spreading apparatus 63 of the fertilizer and chemical | medical agent (for example, insecticide material) from the fertilization apparatus 5 is arrange | positioned at the seedling loading stand 51. . At this time, if the discharge port for fertilizer (or medicine) for the number of rows is provided in the planting section frame 51e which does not move laterally, using the horizontal movement of the seedling carrier 51 to sow fertilizer (or medicine) to both ends of the seedling Can.

  As shown in the side view of the front cover 32 in FIG. 14 (a) and the rear view of the front cover 32 in FIG. 14 (b), stepping on a recess 32a provided below the front cover 32 on the seat 31 side with a foot. By arranging the inter-stock lever 22 which can be used, it becomes difficult for the foot or the like to hit the inter-stock lever 22, so that the erroneous operation of the inter-stock lever 22 can be prevented.

  Further, by arranging the auxiliary transmission lever 17 in parallel with the partition plate 32b constituting the wall surface of the front cover 32 in the recess 32a of the front cover 32, the auxiliary transmission lever 17 can be arranged at a position where legs and the like are difficult to hit. is there.

  In the configuration shown in FIGS. 15 and 16, the pitman arm 175, the follower 179, the second rod 180, 180, etc. are different in the portion where the front wheels 10, 10 are steered by the steering wheel 34. . The pitman arm 175 extends forward from the output shaft 174, and has an actuating roller 177 rotatably mounted at its tip. The follower 179 is disposed on the rear side of the actuating roller 177, and has a bent shape so that the left and right center portions are offset to the front side. Then, when the actuating roller 177 moves to the left and right due to the rotation of the pitman arm 175, the actuating roller 177 contacts the front side surface of the follower 179 and causes the follower 179 to rotate. Specifically, when the steering wheel 34 is turned to the left, the pitman arm 175 is turned to the right and the left and right front wheels 10, 10 are steered to the left, and the actuating roller 177 is moved to the right to follow the follower 179 Of the left and right center portions of the left and right center portions are pushed rearward, and the follower 179 is rotated in the direction in which the second rod 180 on the left side is pulled. Conversely, when the steering wheel 34 is turned to the right, the pitman arm 175 is turned to the left and the left and right front wheels 10, 10 are steered to the right, and the actuating roller 177 is moved to the left to The leftward portion of the central portion is pushed rearward, and the follower 179 is rotated in the direction in which the second rod 180 on the right side is pulled. The second rod 180 is provided with a hydraulic intermittent operation cylinder 217 at a midway portion. By the expansion and contraction of the intermittent operation cylinder 217, the effective length of the second rod 180 is changed to intermittently switch on and off the operation of the side clutch 211.

  The intermittent operation cylinder 217 operates the steering wheel 34 at a predetermined angle or more, based on the rotation speed of the rear wheel 11 outside the turning by the travel distance detection sensor 205, the degree of rotation of the rear wheel 11 outside the turning The side clutch 211 of the rear wheel 11 inside the turning is extended so as to be in a power transmission state for a predetermined time (about 0.5 seconds). The intermittent operation cylinder 217 is operated by operating the intermittent operation hydraulic solenoid valve 218 with the output signal from the control device 163 to switch the oil path of the hydraulic circuit. As a result, the side clutch 211 of the rear inner wheel 11 is intermittently operated to prevent the rear inner wheel 11 from roughening the field, and by turning the machine body at a desired turning radius, it is possible to turn after turning. Line alignment to the planting line of the next process (induction of the machine to the next process position) can be performed properly and easily.

  As shown in FIG. 16, the intermittent operation cylinder 217 is disposed on the left and right of the transmission case 12 at a position overlapping the transmission case 12 in a side view on the left and right of the transmission case 12 and above the lower surface of the transmission case 12. It is disposed below the front wheel axle portion 13a extending to the left and right of the front wheel final case 13 to be fixed. Thus, the intermittent operation cylinder 217 is prevented from directly interfering with the intermittent operation cylinder 217 from the upper side and the lower side of the vehicle body without lowering the minimum ground clearance of the vehicle body by the intermittent operation cylinder 217. Can be prevented, and the intermittent operation cylinder 217 can be disposed between the left and right front wheels 10 and 10 so that they do not interfere with each other even if the front wheel 10 is steered.

  Further, the intermittent operation hydraulic solenoid valve 218 is disposed between the left and right front wheels 10, 10 on the left side of the transmission case 12 on the front side and upper side of the front wheel axle portion 13a. Interfering objects are prevented from interfering to prevent the intermittent operation cylinder 217 from being damaged, and the intermittent operation hydraulic solenoid valve 218 can be disposed utilizing the space on the side of the transmission case 12, It can be made compact.

  As described above, when the operator appropriately operates the handle 23 to turn while adjusting the degree of turning, even if the notification device 186 urges the operation of the handle 23, the turning path of the machine is somewhat different depending on the individual difference of the operator. Differently, there is a possibility that the descent time of the seedling planting part 4 and the planting start position of the seedling may be inadequate. Therefore, when the number of rotations of the rear wheel 11 inside the turning is detected by the traveling distance detection sensor 205, when the operation angle of the steering wheel 23 is equal to or less than a predetermined angle (for example, 180 degrees) It is possible not to count. As a result, when the operator can not travel along a desired turning traveling path by operating the steering wheel 23, the steering wheel 23 is returned straight to the traveling side so that the cultivation board does not slip in a deep field, as well as individual differences among operators. It can prevent that the descent | fall time of the seedling planting part 4 and the planting start position of a seedling are controlled improperly by actual turning distance.

  In addition, a direction sensor is provided to detect the direction of movement of the machine by detecting the direction of movement of the machine by moving the detector into the soil in the field and rotating to the left and right with the movement of the machine. It is also possible not to count the number of revolutions by the traveling distance detection sensor 205.

  When an auxiliary wheel that rotates integrally with the left and right rear wheels 11 is provided outside the left and right rear wheels 11, the rotation is transmitted to the auxiliary wheels, so that the detection accuracy of the traveling distance (turning process) of the vehicle by the traveling distance detection sensor 205 May decrease. Therefore, a rolling angle sensor is provided to detect the rolling angle of the rolling frame with respect to the airframe of the rolling frame that causes the left and right rear wheels 11, 11 to roll. When the wheels 11 and 11 roll, the controller 163 can correct the first set rotational speed N1 and the second set rotational speed N2 to decrease them. As a result, when the left and right rear wheels 11, 11 roll to the side where the rear inner wheel 11 on the inner side turns lower, the auxiliary wheels on the inner side of the turn touch the tillage and turn, the auxiliary wheels The traveling distance of the airframe to be propelled by the rear wheel 11 outside the turning is substantially large with respect to the rotation speed of the first rotation speed, and the first setting rotation speed N1 and the second setting rotation speed N2 are automatically By being corrected as appropriate, it is possible to lower the seedling planting part 4 when appropriate in the turning process of the airframe and to start planting of the seedling when appropriate.

  The left and right rear wheels 11, 11 are operated by an actuator such as a hydraulic cylinder and the left and right rear wheels 11, 11 are operated by a left and right tilt angle sensor provided on a rolling frame or the like for rolling the rear wheels 11, 11. 11 may be detected, and the controller 163 may control the operation of the actuator so that the rolling angle becomes horizontal. At this time, when it is detected by the above-mentioned direction sensor that the traveling direction of the machine body is deviated to the left and right during normal straight planting, the machine body goes straight ahead based on the detection of the direction sensor. The wheels 11, 11 may be subjected to rolling control. Specifically, when the traveling direction of the airframe is to the left, the control target of the rolling angle of the left and right rear wheels 11, 11 is corrected so that the left rear wheel 11 becomes higher than the right rear wheel 11. Conversely, when the traveling direction of the vehicle is to the right, the control target of the rolling angle of the left and right rear wheels 11, 11 is corrected so that the right rear wheel 11 is high relative to the left rear wheel 11. In addition, even when the steering wheel turning angle sensor 193 detects that the steering wheel 23 is not operated by a predetermined angle or more at the time of normal straight planting, when the traveling direction of the machine changes by the direction sensor, the field Since the straightness is difficult to maintain due to the unevenness, etc., the straightness can be maintained by making the control sensitivity of the rolling control of the left and right rear wheels 11, 11 sensitive. As a method of sensitizing the control sensitivity of the rolling control, there is a method of reducing the control dead zone width of the rolling angle or reducing the control dead zone width of the detection value of the direction sensor.

  In addition to the above, the front wheel final case 13 is configured to extend and retract vertically, and the front wheel 10 is configured to be pressed downward by the suspension spring, and the front wheel 10 is configured to move up and down following the unevenness of the tillage. When it is detected by the front wheel vertical motion sensor that the number of vertical motions of 10 is large, the control device 163 can correct the first set rotational speed N1 and the second set rotational speed N2 to decrease. As a result, if the unevenness of the plowing board is severe, the frequency of the auxiliary wheel inside the turn touching the plowing board will increase, and the auxiliary wheel will rotate following the ground as the machine travels. Then, the first set rotational speed N1 and the second set rotational speed N2 are automatically corrected to lower the seedling planting section 4 at an appropriate time in the turning process of the airframe, and at an appropriate time The planting of seedlings can be started. Similarly, the rolling angle sensor determines that the left and right rear wheels 11 and 11 roll frequently so that the unevenness of the tillage is severe, and the control device 163 determines the first set rotation speed N1 and the second set rotation speed. It is good also as composition corrected to the side which decreases N2. When the seedling planting unit 4 is configured to perform rolling control to the left and right, it is determined that the unevenness of the tillage is severe because the rolling control is frequently operated, and the control device 163 determines the first set rotational speed N1. The second set rotational speed N2 may be corrected to decrease.

  Furthermore, a cultivator sensor is provided that detects the cultivator by touching the cultivator at a position immediately before the auxiliary wheel, and it is determined by the detection of the cultivator sensor that the assist wheel immediately after is also touching the cultivator, and the control device Alternatively, the first set rotational speed N1 and the second set rotational speed N2 may be corrected to decrease by 163.

  In addition, when it is detected that the rotational speed (traveling speed) of the rear wheel 11 is high by the traveling distance detection sensor 205 of the rear wheel 11 outside the turning, the first set rotational speed N1 is corrected to be decreased. By advancing the start of lowering of the seedling planting part 4, the seedling planting part 4 can be grounded when appropriate in the turning process. As a result, although the rear wheel 11 inside the turning reaches the second set rotational speed N2, the seedling planting unit 4 is not yet in contact with the ground and the seedlings can not be planted in the field due to aerial planting To prevent such things.

  Handrails 219 are provided from the left and right sides of the backrest 31a of the seat 31 to the rear. The handrail 219 is constructed symmetrically in the left and right sides by bars fixed at both ends to the left and right sides of the backrest 31a, and the bars extend from the side of the backrest 31a to the rear side and are bent and extended upward. It bends and extends inward in the left-right direction and passes through the back of the backrest 31a. The operator can easily get on and off by holding the handrail 219 and getting on and off the machine. In addition, a seedling removing plate for taking out the mat seedlings from the seedling box at the time of seedling supply to the seedling platform 51 can be stored between the backrest 31a and the handrail 219 on the rear side of the backrest 31a. The planting work can be stored near the seedling platform 51 at the time of planting work.

  FIG. 17 shows a configuration in which a pair of left and right connecting members connecting the seat portion 31 b of the seat 31 and the backrest 31 a is a handrail 219. The handrail 219 is bent at an upper portion near the backrest 31a so as to be positioned outside in the left-right direction with respect to the backrest 31a, and a worker grips a portion located outside in the left-right direction You can get on and off easily by getting on and off. The handrail 219 is made of an elastic metal and is configured such that an operator sitting on the seat 31 can bend when the seedling is replenished or the like so that the posture of the backrest 31a can be easily changed.

  During the turning of the machine, for example, when supplying the seedlings from the weir to the machine, it is dangerous if the operator suddenly touches the shift lever 16 and the machine starts to travel. Therefore, a seating sensor for detecting that the operator is seated on the seating surface portion 31b of the seat 31 is provided, and when the seating button is not detected by the seating sensor when the start button (switch) 184 is on and the swing interlock control is being performed, Even when the shift lever 16 is operated by the control device 163, it can be regulated so as not to travel. Thereby, the safety of the seedling replenishment work can be achieved. In addition, normally, the hydraulic transmission (HST) 23 is configured to be output to a gear shift actuator that shifts the hydraulic transmission (HST) 23 based on the detection of a gear shift sensor that detects the operation position of the gear shift lever 16. And, when the seating sensor does not detect seating, the controller 163 may be configured to output to the gear shift actuator to shift to the forward / backward neutral position regardless of the detection of the gear shift lever sensor.

  As described above, when supplying seedlings while the aircraft is turning, not only there is a danger that the operator unexpectedly touches the operation tool, but the engine 20 is driven in an idling state despite the fact that the aircraft is stopped. Continued use causes wasteful fuel consumption and environmental pollution due to exhaust. Therefore, when detecting that the operation tool such as the gear shift lever 16 or the finger lever 166 is not operated for a predetermined time or more (for example, 2 minutes or more) by a detection sensor such as the gear shift lever sensor or the finger lever switch, the control device 163 automatically It should just be made to stop.

It is a side view of a riding type seedling planter. It is a top view of a riding type seedling planter. It is a top view which shows the structure of front wheel steering operation by a steering wheel. It is a perspective view showing composition of front wheel steering operation by a steering wheel. It is a sectional view of a part of mission case which shows a distance detection sensor. It is a perspective view of a change lever part. It is a control block diagram. It is a figure which shows the view of turning interlocking | linkage control. It is a figure explaining traveling control of revolution mode. It is a flowchart of turning interlocking control. It is a figure explaining the connection relation of the sparse transfer standard planting switching lever which operates a speed-change lever and a planting clutch case. They are a side view (a) of a lower end part of a seedling loading stand, and a top view (b) of a lower end part of a seedling loading stand. It is a rear view of a seedling loading stand part. They are a side view (a) and a rear view (b) of a front cover part. It is a top view which shows the structure of front wheel steering operation by a steering wheel. It is a side view showing composition of front wheel steering operation by a steering wheel. It is a perspective view showing a different seat.

  1: Passenger-type seedling planter, 2: Traveling car body, 4: Seedling planting section, 11: Rear wheel, 12: Engine, 21: Transmission device, 34: Handle, 163: Control device, 186: Notification device, 205: Running distance detection sensor, 211: side clutch

Claims (4)

A transmission (21) to which power from the engine (12) is transmitted, left and right rear wheels (11) driven by the output from the transmission (21), and transmission to the rear wheel (11) Side clutch (211), a seedling planting unit (4) that can move up and down, a travel distance detection sensor (205) that detects travel distance, and a steering wheel (34) for steering operation Detection of travel distance is started by the travel distance detection sensor (205) when the operating angle of the steering wheel (34) reaches or exceeds a predetermined value, and when the travel distance reaches the first set travel distance the seedling planting section (4 Of the rolling frame which starts to plant the seedlings by the seedling planting section (4) when the traveling distance reaches the second set traveling distance and lowers the rear wheels (11) on either side. Detect rolling angle The-ring angle sensor provided detects frequent rolling ring (11) after the right and left by the rolling angle sensor, a control unit that performs correction to reduce the first setting the travel distance and the second set travel distance (163) A riding type seedling planter characterized in that it is provided. The control device (163) operates the notification device (186) when the traveling distance reaches the first set traveling distance, and the second traveling distance does not return to the central position even if the steering wheel (34) is loosened. The riding type seedling planting machine according to claim 1, characterized in that the notification device (186) is operated when the set traveling distance is reached . The control device (163) detects the traveling distance by the traveling distance detection sensor (205) when the operating angle of the steering wheel (34) is equal to or less than a predetermined angle when the traveling distance is detected by the traveling distance detection sensor (205). The suspension type seedling planting machine according to claim 1 or 2, characterized in that Pitman arm (175) for transmitting steering operation from steering wheel (34) to front wheel (10), follower (179) pivoted by pitman arm (175), and left and right side clutches from follower (179) The left and right rods (180) connected to (211) are provided, and the left and right intermittent operation cylinders (217) are provided in the middle of the rod (180) respectively, and the left and right intermittent operation cylinders (217) have a mission The intermittent operation cylinder (217) is disposed on the left and right sides of the case (12) and above the lower surface of the transmission case (12) and below the front wheel axle (13a) fixed to the left and right of the transmission case (12). The intermittent operation hydraulic solenoid valve (218) for operating the) is operated between the left and right front wheels (10) and on the side and front of the transmission case (12). Riding seedling planting machine according to any one of claims 1 to 3, characterized in that arranged on the upper side of the axle (13a).