JP2005198519A - Seedling transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seedling transplanter designed to solve problems that supplying operation at the side of a levee must be carried out after rice transplanting operation with a rice transplanter and the efficiency in rice transplanting operation is bad because seedlings are planted in a position where the machine body is advanced even when a planting clutch is engaged and the seedlings cannot be planted at the side of the levee though planting operation at each butt is performed by initially drawing the rear of a rice transplanting apparatus nearest to the side of the levee, engaging the planting clutch and advancing the machine body, and to enable to plant the seedlings at the side of the levee and improve the efficiency in seedling transplanting operation. <P>SOLUTION: This seedling transplanter is composed as follows. An operating region for advancing the machine body while driving the transplanting apparatus 3 and an operating region for driving only the transplanting apparatus 3 without advancing the machine body are installed in a speed change lever 90 and an operating apparatus 90D operating the planting clutch C is provided in the speed change lever 90. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a seedling transplanter such as a rice transplanter or a grass transplanter.

Some rice transplanters are provided with a planting clutch that stops the power transmission to the rice planting device and stops the operation of the seedling planting tool.
Japanese Patent Laid-Open No. 10-181364

  In the rice transplanting operation by the rice transplanter, first, a reciprocating planting operation is performed with the headland turning headland remaining at the shore of the farm. Finally, the headland left for plant turning during reciprocation is planted last.

  This headland planting operation is performed by first bringing the rear part of the machine (the rear part of the rice planting device) closest to the edge and moving the machine forward with the planting clutch set to “ON”. Since the seedlings were planted in the advanced position, it was not possible to plant the seedlings on the verge. Therefore, it was necessary to perform supplementary planting work at the shore after rice transplanting work by the rice transplanter, and the rice transplanting work efficiency was poor.

  Therefore, it is an object to provide a seedling transplanting machine that can plant seedlings at the time of dredging and to improve the efficiency of seedling transplanting work.

  According to the first aspect of the present invention, in the seedling transplanting machine provided with the speed change lever 90 for changing the traveling speed of the airframe and the planting clutch C for stopping the operation of the transplanting device 3, the speed shifting lever 90 drives the transplanting device 3. The seedling transplanting machine is provided with an operation area for moving the machine body forward and an operation area for driving only the transplanting apparatus 3 without moving the machine body, and an operation apparatus 90D for operating the planting clutch C on the shift lever 90. Is.

  Accordingly, at the headland, the rear part of the machine body (the rear part of the transplanter 3) is brought closest to the heel and the shift lever 90 is set to “an operation region in which only the transplanter 3 is driven without moving the machine forward”, so that the operation device 90D is Operate the planting clutch C to “ON”. Then, with the aircraft stopped, power is transmitted to the transplanting device 3 and the planting operation is started. Therefore, when the operator has planted one seedling at the back of the plant while looking at the back, if the shift lever 90 is set to “an operation area in which the aircraft is advanced while driving the transplanting device 3”, the aircraft is moved forward as it is. Can be planted. Therefore, seedlings can be planted from the shoreline properly and efficiently in the headland transplanting work, and the supplementary planting work at the ridgeline after the seedling transplanting work by the seedling transplanter is unnecessary, improving the efficiency of the seedling transplanting work. To do.

  In the invention according to claim 2, when the seedling planting tool position detecting means 180 detects that the seedling planting tool 164 is a position for planting a seedling in the soil while the body is stopped, the PTO clutch 93 is turned off and the transplanting device is turned off. The seedling transplanting machine according to claim 1, further comprising a control means that cuts off the driving to 3 and a control means for driving the transplanting device 3 by inserting the PTO clutch 93 by detecting the advance of the machine body. is there.

  Accordingly, at the headland, the rear part of the machine body (the rear part of the transplanter 3) is brought closest to the heel and the shift lever 90 is set to “an operation region in which only the transplanter 3 is driven without moving the machine forward”, so that the operation device 90D is Operate the planting clutch C to “ON”. Then, with the aircraft stopped, power is transmitted to the transplanting device 3 and the planting operation is started. Then, when the seedling planting tool position detecting means 180 detects that the seedling planting tool 164 is a position for planting a seedling in the soil, the PTO clutch 93 is turned off, and the planting operation is stopped. That is, the seedling planting tool 164 stops immediately before planting a single seedling at the time of dredging. Next, when the speed change lever 90 is set to “an operation area in which the airframe is advanced while driving the transplanting device 3” and the airframe is advanced, the PTO clutch 93 is turned “on” and the planting operation is started. Therefore, the seedling planting tool 164 in a state stopped just before planting one seedling starts planting the seedling from the shoreline, and the seedling from the shoreline can be properly and efficiently planted by the headland planting work, The supplementary planting work at the heel after the seedling transplanting work by the seedling transplanting machine becomes unnecessary, and the efficiency is improved.

  According to the third aspect of the present invention, the “operating region in which only the transplanting device 3 is driven without advancing the aircraft” and the “operating region in which the aircraft is advanced while driving the transplanting device 3” of the shift lever 90 are provided adjacent to each other. The seedling transplanter according to claim 1 or claim 2 is provided.

  Therefore, in addition to the operation of the invention according to claim 1 or 2, the shift lever 90 is moved forward from "the operation region in which only the transplant device 3 is driven without moving the aircraft forward" while the transplant device 3 is driven. The operation of moving the aircraft forward in the “operation area to be performed” can be performed easily and quickly, and an appropriate headland can be planted.

  According to the present invention, it is possible to obtain a seedling transplanting machine that can plant seedlings at the heel by a simple operation, and to improve the work efficiency of seedling transplanting work.

  The output of the operation position sensor 95 of the transmission lever 90, the output of the push operation of the lowering switch 90D provided on the grip 90a of the transmission lever 90, and the detection output of the position detection sensor 180 of the seedling planting tool are input to the control device 170. The rice transplanter 3 is controlled by the controller 170 so that seedlings can be transplanted at the time of dredging.

  An 8-row planted rice transplanter as an embodiment of the present invention will be described in detail with reference to the drawings. The traveling vehicle 1 is mounted with a rice planting device 3 which is a kind of working device by a lifting link device 2 and provided with a fertilizer application device 4, and is configured as a riding fertilizer rice transplanter as a whole. The traveling vehicle 1 is a four-wheel drive vehicle having a pair of left and right front wheels 6 and 6 and rear wheels 7 and 7 as drive wheels.

  A transmission case 11 is fixed to the front of the left and right main frames 10 and 10 with bolts, and an engine 12 is mounted on the left and right main frames 10 and 10 via rubber mounts M. A hydraulic continuously variable transmission HST capable of continuously shifting forward and reverse speeds on the side wall surface is fixed by bolts and assembled integrally, and a steering shaft 14 projects upward from the front of the hydraulic continuously variable transmission HST. Yes.

  A steering handle 16 is provided at the upper end of the steering shaft 14, and an operation panel 17 is provided below the steering handle 16. A fuselage cover 19, in which steps are integrally formed from a synthetic resin serving as a steering floor, is attached to the upper part of the fuselage, and a cockpit seat 20 is installed above the engine 12.

  The airframe cover 19 includes a front cover 19a that covers a horizontal plane from the front of the airframe to the left and right sides of the cockpit 20 and a rear center cover 19b that covers the left and right central portions of the rear of the airframe. On the left and right upper surfaces of the front cover 19a, a continuous flat step surface is formed. The cockpit seat 20 is attached to the upper front side of the rear center cover 19b.

  Accordingly, when performing various operations on the rice planting device 3 and the fertilizer application device 4 and supplying the spare seedlings to the seedling table 163 and supplying fertilizer to the fertilizer application device 4, the operator (operator) is on the front cover 19 a on both the left and right sides of the cockpit 20. However, at this time, since a continuous flat step surface is formed, it is possible to avoid a situation in which an operator gets stuck in a trip and can work efficiently and safely.

  The front wheels 6, 6 are pivotally supported by front wheel support cases 22, 22 provided on the side of the mission case 11 so as to be capable of turning. The rear wheels 7 and 7 are pivotally supported by left and right rear wheel transmission cases 24 and 24, respectively. The left and right rear wheel transmission cases 24 and 24 are connected by a case connecting frame 24a, and the case connecting frame 24a is connected to the left and right main frames. 10, 10 is supported by a rolling shaft 25 projecting from a horizontal frame 10a connecting rear end portions of 10 and 10 so as to be rotatable in a plane perpendicular to the traveling direction.

  Further, at the rear end portions of the left and right main frames 10 and 10, the base portions of the left and right vertical frames 10g and 10g that rotatably support the front portion of the elevating link device 2 are fixed by welding.

  The rotational power of the engine 12 is transmitted to the input shaft 35 of the hydraulic continuously variable transmission HST via the belt 31, and the output shaft 36 of the hydraulic continuously variable transmission HST extends into the transmission case 11 so that the drive gear G1 is driven. Is provided. A traveling primary shaft 50, a traveling secondary shaft 51, a planting primary shaft 52, a planting secondary shaft 53, and a planting tertiary shaft 54 are supported in parallel at the front portion of the transmission case 11.

  The drive gear G1 of the output shaft 36 of the hydraulic continuously variable transmission HST and the gear G2 of the traveling primary shaft 50 are engaged with each other to transmit the driving force to the traveling primary shaft 50, and the transmission gear G3 / gear G4 of the traveling primary shaft 50 The transmission gear G5 and the gear G6 of the traveling secondary shaft 51 are meshed with each other, so that the speed is changed and the driving force is transmitted to the traveling secondary shaft 51 (the transmission gear G3 and the gear G4 are moved by the shifter 56). When the transmission gear G3 and the gear G5 are engaged with each other, the operation speed is low, and the transmission gear G3 and the gear G4 are moved by the shifter 56 so that the transmission gear G4 and the gear G6 are engaged. Time is high road speed). Further, the position where the transmission gear G3, the gear G4, the gear G5, and G6 do not mesh with any of the gears is neutral. The speed change lever 90 for performing the speed change operation is provided on the operation panel 17, and the speed change lever 90 is also used for the speed change operation of the hydraulic continuously variable transmission HST so that the speed change operation of the hydraulic continuously variable transmission HST can be performed. It has become.

  On the other hand, the gear G7 provided on the planting primary shaft 52 meshes with the transmission gear G3 of the traveling primary shaft 50, and the gear G8 provided on the planting primary shaft 52 is moved by the shifter 57 as an inter-plant transmission. By engaging with the gear G9 or the gear G10 of the attached secondary shaft 53, the planting primary speed change is performed, and further, the gear G11, the gear G12, the gear G13, the gear G14 provided on the planting secondary shaft 53 and the planting tertiary shaft 54 are provided. The gear G15, the gear G16, the gear G17, and the gear G18 provided on the gear are always meshed, and only the gear engaged with the planting tertiary shaft 54 is transmitted by a general key type shifter 58a. Secondary shifting is performed so that eight-stage stock switching can be performed by planting primary shifting and planting secondary shifting. On the other hand, the planted tertiary shaft 54 is transmitted to the planted portion transmission shaft 58 via the bevel gears G19 and G20. The planted tertiary shaft 54 has a dog clutch for the gear group gear G15, gear G16, gear G17, and gear G18. The planting clutch C is provided, and the planting clutch C composed of the dog clutch is disconnected by engaging the planting clutch C with the pin 55 operated by the operation lever, and the planting tertiary shaft 54 stops at a fixed position. (A so-called known seedling planting tool 164 is a fixed position stop clutch for stopping at a fixed position).

  Here, based on FIG. 7, the relationship between the transmission lever 90 and each transmission gear is demonstrated in detail. As shown in FIG. 7, the guide groove 91 of the transmission lever 90 increases the lateral groove 91a for moving the transmission gear G3 and the gear G4 by operating the transmission lever 90 in the lateral direction of the machine body and the hydraulic continuously variable transmission HST to the forward side. It consists of forward vertical grooves 91b, 91c, 91d that operate at high speed and a rear vertical groove 91e that increases the speed of the hydraulic continuously variable transmission HST in the reverse direction.

  When the transmission lever 90 is set to the A position of the lateral groove 91a, the transmission gear G3 and the gear G4 are moved by the shifter 56, the transmission gear G3 and the gear G5 are engaged, and the gear G6 and the gear G7 are not engaged. That is, the planting portion transmission shaft 58 is not driven at a low working speed, and when the speed change lever 90 is operated rearward along the rear vertical groove 91e from this position A, the hydraulic continuously variable transmission HST is neutral. Then, the speed is changed so that the reverse speed is increased, and the machine body moves backward (the planting device 3 and the fertilizer 4 do not operate because the planting portion transmission shaft 58 is not driven).

  When the transmission lever 90 is set to the B position of the lateral groove 91a, the transmission gear G3 and the gear G4 are moved by the shifter 56, and the transmission gear G3, the gear G5 and the gear G7 are engaged, and the gear G6 is not engaged. That is, the planting portion transmission shaft 58 is driven at a low work speed, and when the speed change lever 90 is operated forward from the B position along the front vertical groove 91b, the hydraulic continuously variable transmission HST is The speed is increased so that the forward speed is increased from the neutral position, and the aircraft moves forward (the planting part transmission shaft 58 is driven, so the rice planting device 3 and the fertilizer application device 4 are operated to perform the rice planting work and the fertilizer application. Work at the same time).

  Further, when the shift lever 90 is set to the B position of the lateral groove 91a, the shift gear G3 and the gear G4 are moved by the shifter 56, the shift gear G3 and the gear G5 and the gear G7 are engaged, and the gear G6 is not engaged. That is, the planting portion transmission shaft 58 is driven at a low work speed, and when the speed change lever 90 is operated forward from the B position along the front vertical groove 91b, the hydraulic continuously variable transmission HST is The speed is increased so that the forward speed is increased from neutral, and the aircraft moves forward at a low work speed (the planting device 3 and the fertilizer 4 are operated because the planting shaft 58 is driven). Rice transplanting and fertilizing operations can be performed simultaneously).

  Further, when the transmission lever 90 is set to the C position of the lateral groove 91a, the transmission gear G3 and the gear G4 are moved by the shifter 56, and the transmission gear G3 and the gear G7 are engaged, and the gear G5 and the gear G6 are not engaged. That is, only the planting portion transmission shaft 58 is driven, and when the speed change lever 90 is operated forward from the C position along the front vertical groove 91c, the hydraulic continuously variable transmission HST moves forward from the neutral speed. Thus, the driving speed of the planting portion transmission shaft 58 is increased while the machine body is stopped. That is, only the rice transplanting device 3 and the fertilizer application device 4 can be operated.

  When the shift lever 90 is set to the D position of the lateral groove 91a, the shift gear G3 and the gear G4 are moved by the shifter 56, and all the shift gears G3, G4, gear G5, gear G6, and gear G7 are not engaged. That is, the aircraft stops and the planting part transmission shaft 58 is not driven.

  Finally, when the transmission lever 90 is set to the E position of the lateral groove 91a, the transmission gear G3 and the gear G4 are moved by the shifter 56, the transmission gear G4 and the gear G6 are engaged, and the gear G3, the gear G5, and the gear G7 are engaged. Does not mesh. In other words, the planting portion transmission shaft 58 is not driven at a high moving speed on the road or the like, and when the speed change lever 90 is operated forward from the E position along the front vertical groove 91d, the hydraulic continuously variable transmission The HST is shifted so that the forward speed is increased from the neutral, and the aircraft moves forward at a high speed (the planting device 3 and the fertilizer 4 are in operation because the planting part transmission shaft 58 is not driven). do not do).

  In addition, a PTO clutch case 92 is provided in the middle of the planting part transmission shaft 58 provided rearward from the mission case 11 and is transmitted to the rice planting device 3 and the fertilizer application device 4. A PTO clutch 93 for intermittently driving the planting portion transmission shaft 58 is provided in the 92 so as to be operated by an electromagnetic solenoid 94.

  On the other hand, the grip 90a of the speed change lever 90 is provided with an up switch 90U and a down switch 90D for raising and lowering the rice planting device 3 and turning on and off the power transmission to the fertilizer device 4 and the rice planting device 3. A series of operations ranging from raising and lowering the rice transplanter 3 to working power transmission can be quickly operated while holding the grip portion 90a, and the operability is good.

  More specifically, the operator operates the ascending switch 90U or the descending switch 90D while holding the grip 90a of the speed change lever 90, so that the solenoid hydraulic valve 161 is operated by the rice planting device elevating means of the control device 170. And the hydraulic cylinder 160 can be expanded and contracted to move the rice transplanter 3 up and down with respect to the traveling vehicle 1. Further, every time the lowering switch 90D is pushed, the planting clutch actuating means SOL173 is operated by the planting clutch actuating means of the control unit 170, and the power to the fertilizer application unit 4 and the rice planting unit 3 is alternately turned on and off. Thus, the transmission of the fertilizer application device 4 and the rice planting device 3 can be turned on and off.

  On the other hand, the raising switch 90U switches the solenoid hydraulic valve 161 to switch between rising and stopping every time the pressing operation is performed, and the lowering switch 90D switches the solenoid hydraulic valve 161 to lowering once the pressing operation is performed. Each time the lowering switch 90D is pushed, it can be switched between ascending, ascending stop, and descending, and these operations can be facilitated accurately.

  Further, when the lift switch 90U is pushed, the rice transplanter 3 can be raised, but at the same time, the work transmission to the fertilizer application device 4 and the rice transplanter 3 can be switched off to stop the work.

  The lowering switch 90D can also switch on and off of work transmission. As described above, the lowering switch 90D can lower the rice transplanter 3 when pressed once. However, when pressed again, the fertilizer application device 4 and the rice transplanter 3 are operated. The work transmission to is switched on. Then, every time the descending switch 90D is pressed, the work transmission to the fertilizer application device 4 and the rice transplanting device 3 is switched between on and off, and the work can be performed or stopped. It is possible to switch between work transmission and this transmission stop by the same lowering switch 90D for lowering the rice transplanter 3, and the operability can be improved.

  Further, the grip 90a is provided with a lowering switch 90b for lowering the rice transplanter 3 by a pressing operation and stopping the lowering by releasing the pressing operation. Therefore, the grip 90a of the shift lever 90 includes the lowering switch 90D and the lowering switch 90D. In addition, a lowering switch 90b dedicated to lowering is provided, and when the operation is started at the shore, etc., the rice transplanter 3 is switched between lowering and stopping by pressing the lowering switch 90b and releasing the pressing operation. Therefore, delicate alignment can be easily performed and operability can be improved. Since the lowering dedicated switch 90b is arranged at the rear of the ascending switch 90U and the lowering switch 90D, erroneous operation of the lowering dedicated switch 90b that is less frequently used can be reduced.

  Since the shape of the raising switch 90U is circular, the shape of the lowering dedicated switch 90b is triangular, and the shape of the lowering switch 90D is square, the plurality of switches are arranged close to the grip portion 90a. The operation feelings of the switches 90U, 90D, and 90b are different and the distinction is improved, so that erroneous operations can be reduced and the work efficiency is improved. Instead of changing the shape of the switch, a protrusion having a different shape is provided on the operation surface of each switch (for example, there is no protrusion on the surface of the lift switch 90U and one protrusion is provided on the surface of the lower switch 90b. In addition, three convex portions are provided on the surface of the lowering switch 90D, or the convex shapes of the surfaces of the respective switches 90U, 90D, and 90b are made different.

  Further, the transmission lever 90 is provided with an operation position sensor 95 constituted by a potentiometer that detects the operation position (position A to position E).

  The center part of the left and right front axles 60, 60 is supported at the rear part of the transmission case 11, and is transmitted by the gear G6 and the gear G21 from the traveling secondary shaft 51. The left and right front wheels 6, 6 are connected via the differential device D1. It is configured to be driven and rotated. The left and right front wheel support cases 22 and 22 have a general structure that is supported by front axle cases 59 and 59 that are respectively fixed to the left and right sides of the rear portion of the transmission case 11 with bolts.

  The left and right front axles 60 and 60 are provided so that left and right rear wheel drive bevel gears G22 and G22 rotate integrally with the differential device D1 therebetween, and the driven bevel gears meshed with the left and right rear wheel drive bevel gears G22 and G22. Left and right rear wheel drive shafts 62 and 62 are linked to G23 and G23 via left and right rear wheel side clutch mechanisms C1 and C1. Here, the left and right rear wheel drive bevel gears G22 and G22 and the driven bevel gears G23 and G23 increase the rear wheel transmission rotational speed. After the speed increase, the left and right rear wheel side clutch mechanisms C1 and C1 are provided. The driving force transmission torque is small, a small clutch mechanism can be used, and the mission case can be downsized, that is, the aircraft can be downsized. The left and right rear wheel drive shafts 62 and 62 transmit power to the left and right rear wheel transmission cases 24 and 24, respectively, and the left and right rear wheel transmission cases 24 and 24 reduce the rear wheel transmission rotation speed with a reduction mechanism. Thus, the left and right rear wheels 7, 7 are driven.

  A four-wheel brake 65 is provided at the end of the traveling secondary shaft 51. When the brake pedal 140 provided on the body cover 19 is depressed, the brake is activated to brake the traveling secondary shaft 51. As a result, the left and right front wheels 6 and 6 and the left and right rear wheels 7 and 7 are braked to stop the aircraft.

  On the other hand, the mission case 11 has a shape such that the rear upper part is cut out in a side view, and a mounting plate-like rib 11a protrudes above the central part of the left side wall surface of the mission case 11, The hydraulic continuously variable transmission HST is fixed with a bolt so that the rear portion of the hydraulic continuously variable transmission HST is located at a notched portion of the transmission case 11 and the hydraulic continuously variable transmission. The HST is fixed integrally with each other in a state where the lateral width is narrow and the vertical height is low.

  Then, a hydraulic continuously variable transmission pump P1 (hydraulic pump P1 is provided on the opposite surface of the plate-shaped rib 11a for mounting the mission case 11 to the surface on which the hydraulic continuously variable transmission HST is fixed by bolts. Furthermore, a hydraulic drive source pump for power steering may be used as well as a hydraulic pump P2 for working device operation that serves as a hydraulic drive source for moving up and down, rolling, and pitching the rice transplanter 3 that is a kind of working device. It is fixed with bolts. The input shaft 35 of the hydraulic continuously variable transmission HST projects through the right wall surface of the hydraulic continuously variable transmission HST and the mounting plate rib 11a so as to protrude into the hydraulic continuously variable transmission pump P1. The drive shafts of the hydraulic pumps P1 and P2 are also used. That is, the hydraulic pumps P1 and P2 are also provided in the space above the rear part of the transmission case 11, and the drive configuration of the hydraulic continuously variable transmission pump P1 and the working device operating hydraulic pump P2 is simple. In addition, the arrangement of the hydraulic continuously variable transmission HST, the transmission case 11, the hydraulic continuously variable transmission pump P1 and the working device operating hydraulic pump P2 is not wasteful. The structure of the part is reduced in size, and an inexpensive and lightweight aircraft can be obtained.

  A steering shaft 14 is rotatably supported at the front part of the transmission case 11 and a gear transmission mechanism for rotating the pitman arm 175 is disposed. That is, when the operator rotates the steering handle 16, the left and right front wheels 6 and 6 are steered via the steering shaft 14, the gear transmission mechanism, the pitman arm 175, and the left and right linkage rods 176 and 176. ing. If the hydraulic continuously variable transmission HST is arranged behind the steering shaft 14 in this way, the arrangement configuration of the transmission case 11, the hydraulic continuously variable transmission HST, and the steering shaft 14 becomes a simple and compact configuration. The structure of the machine body is reduced in size, an inexpensive and lightweight machine body can be obtained, and excellent traveling performance can be exhibited as a paddy field traveling machine body, and various operations such as rice planting can be performed satisfactorily.

  Since the main part of the mission case 11 and the hydraulic continuously variable transmission HST are arranged in the left and right directions with respect to the left and right center line of the body, the left and right balance of the body is good. As a paddy field vehicle, it can exhibit excellent traveling performance and can perform various operations such as rice planting.

  ML and MR are left and right line drawing markers provided on the left and right sides of the rice transplanter 3, and the left and right drive motors M1 and M1 are moved into a drawing action state in which the machine body center line in the next process is drawn to the field and a storage state rotated upward. Is configured to be switched. More specifically, for example, when the left drawing marker ML is in a drawing action state, if the lifting switch 90U of the grip portion 90a of the shift lever 90 is pressed, the left drive motor is driven by the left and right drawing marker operating means of the control device 170. When the left drawing marker ML in the drawing operation state is moved to the retracted state by operating M1, and then the lowering switch 90D of the grip portion 90a is pushed and operated, the right drawing motor actuating means of the controller 170 reverses the right drive motor M1. Is activated and the right-drawing marker MR in the retracted state is brought into a drawing action state. Thereafter, each time the up switch 90U and the down switch 90D are operated, the left and right drawing markers ML and MR are alternately drawn. When the marker changeover switch MS provided on the operation panel 17 is set to the automatic position, the left and right line drawing markers ML and MR are alternately drawn as described above, and when the marker changeover switch MS is set to the OFF position, the left and right line drawing markers are set. ML / MR does not operate even when the lowering switch 90D is pushed and operated in the retracted state, and when the marker changeover switch MS is set to the double-out position, the left / right driving motors M1,. Both M1 act | operate and both right-and-left drawing markers ML * MR will be in a drawing action state.

  Next, the rice transplanter 3 is mounted on the traveling vehicle 1 so as to be movable up and down by the link device 2 for raising and lowering. The configuration for raising and lowering and the configuration of the rice transplanter 3 will be described.

  First, the piston upper end of a general hydraulic cylinder 160 whose base is rotatably provided on the traveling vehicle 1 is connected to the lifting link device 2, and the solenoid hydraulic valve 161 is connected to the hydraulic pump P <b> 2 provided on the traveling vehicle 1. The rice transplanter 3 connected to the lifting / lowering link device 2 is moved up and down by supplying / discharging pressure oil to / from the hydraulic cylinder 160 and extending / retracting the piston of the hydraulic cylinder 160.

  The rice transplanting device 3 is supported by a planting transmission case 162 that also serves as a frame that is freely mounted on the rear of the lifting link device 2 via a rolling shaft, and a support member provided in the planting transmission case 162. A seedling mounting table 163 that reciprocates in the left-right direction of the machine body, and a seedling planting tool 164 that is attached to the rear end of the planting transmission case 162 and divides seedlings one by one from the lower end of the seedling mounting table 163 to be planted in the field. ... and a center float 165, a side float 166, etc., which are leveling bodies whose rear part is pivotally supported at the lower part of the planting transmission case 162 and whose front part is mounted so as to freely swing up and down. The center float 165 and the side floats 166 are provided so as to level the field and level the front of the field where the seedlings are planted by the seedling planting tools 164. Note that two seedling planting tools 164 are mounted on each of the rotating cases 164a mounted on both sides of the rear end of each of the four transmission cases extending rearward of the planting transmission case 162.

  Power is transmitted to the planting transmission case 162 of the fertilizer application device 4 and the rice planting device 3 by the planting part transmission shaft 58 extending from the mission case 11 behind the universal joint. Reference numeral 169 denotes a center float sensor configured by a potentiometer that detects the vertical position of the front portion of the center float 165, and is linked to the upper surface of the front portion of the center float 165 by a link. Based on the detection of the vertical position of the center float 165 front part of the center float sensor 169, the solenoid hydraulic valve 161 is controlled by the rice transplanter lifting means of the controller 170, and the vertical position of the rice transplanter 3 is controlled by the hydraulic cylinder 160. Is configured to do.

  That is, when the front part of the center float 165 is lifted to an appropriate range or more by an external force, the hydraulic oil pumped out from the transmission case 11 by the hydraulic pump P2 is sent to the hydraulic cylinder 160, and the piston is protruded to raise and lower the link. The device 2 is moved up to raise the rice transplanter 3 to a predetermined position, and when the front part of the center float 165 is lowered beyond the proper range, the pressure oil in the hydraulic cylinder 160 is returned to the mission case 11 for raising and lowering. The link device 2 is moved down to lower the rice transplanter 3 to a predetermined position, and when the front part of the center float 165 is in an appropriate range (when the rice transplanter 3 is in an appropriate predetermined position), the hydraulic cylinder 160 It is provided so that the pressure oil in and out can be stopped and the rice transplanter 3 can be held in a fixed position. As described above, the center float 165 is used as a ground sensor for automatic height control of the rice transplanter 3.

  Here, a pitching mechanism that causes the rice transplanter 3 to perform a pitching operation on the traveling vehicle 1 will be described.

  A hydraulic pitching cylinder 210 is provided in the middle of the upper link of the elevating link device 2, and the length of the upper link is changed by the expansion and contraction of the pitching cylinder 210 to drive the rice transplanter 3 relative to the traveling vehicle 1. Pitching movement is possible. In detail, the front upper link 2a is formed of a hollow square pipe material, and the fitting member 2c fixed to the front end of the rear upper link 2b is slidably fitted to the rear end of the front upper link 2a. In this state, the tip of the piston 210a, which advances and retracts the pitching cylinder 210 fixed to the front upper link 2a, is fixed to the rear upper link 2b side. Accordingly, when the pressure oil is supplied to and discharged from the pitching cylinder 210 and the piston 210a advances and retreats, the fitting member 2c fixed to the front end of the rear upper link 2b slides in the rear end portion of the front upper link 2a, The link length is changed.

  On the other hand, a tilt sensor 211 that detects the tilt angle of the traveling vehicle 1 in the front-rear direction is provided on the main frame 10, and the front-rear tilt posture of the rice planting device 3 with respect to the field scene is changed regardless of the change in the front-rear tilt posture of the traveling vehicle 1. The control valve 212 of the pitching cylinder 210 is switched and operated by the pitching control means of the control device 170 based on the detection information of the tilt sensor 211 so as to maintain the predetermined posture.

  Accordingly, the rice transplanter 3 is forcibly pitched so as to assume a predetermined posture. For example, when the front wheel 6 falls into the recess and the traveling vehicle 1 tilts greatly forward and tilts from a normal traveling state in a farm field where the mud surface and hard board are horizontal, the pitching cylinder 210 is driven to extend and the length of the upper link is increased. By making the length longer, the forward movement of the rice transplanter 3 is offset and the rice transplanter 3 is maintained in a predetermined posture. On the other hand, when the traveling vehicle 1 is largely raised and tilted by the front wheel 6 climbing on the convex portion, the pitching cylinder 210 is driven to be shortened to shorten the length of the upper link. The rice transplanter 3 is maintained in a predetermined posture by canceling the upward movement.

  Next, the characteristic configuration of the present invention will be described in detail.

  The position where any one of the two seedling planting tools 164 mounted on the rotating case 164a is planted in the soil in the transmission system in the planting transmission case 162 (the position of the seedling planting tool 164 in FIG. 1). The position detection sensor 180 of the seedling planting tool for detecting that is provided. That is, the convex portions 180a and 180a provided at two locations on the outer periphery of the transmission shaft provided in the transmission system are detected by the position detection sensor 180 including a proximity sensor, and when this is detected, the seedling planting tool 164 is in the soil. It is configured to be a position to plant seedlings.

  Then, the output of the operation position sensor 95 of the speed change lever 90, the output of the push operation of the lowering switch 90D provided on the grip 90a of the speed change lever 90, and the detection output of the position detection sensor 180 of the seedling planting tool are input to the control device 170. Then, as shown in the control flow diagram of FIG. 10, the rice transplanter 3 is controlled to operate as follows.

  That is, in the rice transplanting operation by the riding type rice transplanter, first, the reciprocating planting operation is performed while leaving the headland for turning the machine body at the edge of the field. Finally, the headland left for plant turning during reciprocation is planted last.

  The headland planting operation is performed by first pressing the lower switch 90D provided on the grip portion 90a of the transmission lever 90 with the rear part of the machine body (the rear part of the rice transplanter 3) closest to the heel. The rice planting apparatus 3 is lowered by the lifting / lowering means until the center float 165, the side float 166. Therefore, when the shift lever 90 is moved forward along the front vertical groove 91c with the PTO position (C position), the operation position sensor 95 detects that the shift lever 90 is at the PTO position (STEP 1). When the lowering switch 90D is pushed (STEP 2), the planting clutch C of the control device 170 is turned on by the planting clutch actuating means (STEP 3), and the machine body is stopped and the fertilizer 4 and the rice planting device 3 are stopped. Power is transmitted and fertilization and planting work is performed.

  Then, when the seedling planting tool position detection sensor 180 detects that the seedling planting tool 164... Is a position to plant seedlings in the soil (STEP 4), the electromagnetic solenoid 94 is actuated by the PTO clutch actuating means of the control device 170. Thus, the PTO clutch 93 is turned off, and the fertilization and planting operations are stopped (STEP 5). That is, the seedling planting tool 164... Stops immediately before planting a single seedling.

  Next, when the operator sets the speed change lever 90 to the planting work speed position (B position) and moves forward along the front vertical groove 91b (STEP 6), the PTO clutch actuating means of the control device 170 is operated. As a result, the electromagnetic solenoid 94 is actuated to turn the PTO clutch 93 "ON", and the fertilization and planting work starts (STEP 7). Therefore, since the seedling planting tool 164 in a state stopped just before planting one seedling starts planting the seedling from the edge of the plant and can also apply fertilization at the edge of the seedling, Seedlings can be planted properly and efficiently, and supplementary planting work at the end of the paddy field using a riding type rice transplanter is not required, improving the efficiency of rice transplanting work.

  In the above embodiment, it is detected that the shift lever 90 has been operated to the planting work speed position (B position) in STEP 6 and the PTO clutch 93 is controlled to be “ON” in STEP 7. 6 or the rear wheel 7 is provided with a rotation detection sensor. At STEP 6, it is detected that the front wheel 6 or the rear wheel 7 has rotated (ie, the aircraft has moved forward), and at STEP 7, the PTO clutch 93 is turned “ON”. You may control as follows.

  Further, the control flow chart shown in FIG. 11 shows that the output of the operation position sensor 95 of the shift lever 90 and the lowering provided on the grip 90a of the shift lever 90 without using the position detection sensor 180 and the PTO clutch 93 of the seedling planting tool. An example in which the output of the pressing operation of the switch 90D is input to the control device 170 and the rice transplanting device 3 is operated so that seedlings can be planted from the edge of the headland.

  That is, in the headland, when the lower switch 90D provided on the grip 90a of the speed change lever 90 is pushed by bringing the rear part of the machine body (the rear part of the rice transplanter 3) closest to the coast, The device 3 is lowered until its center float 165, side float 166, etc. are in contact with the farm scene. Therefore, when the shift lever 90 is moved forward along the front vertical groove 91c with the PTO position (C position), the operation position sensor 95 detects that the shift lever 90 is at the PTO position (STEP 1). When the lowering switch 90D is pushed (STEP 2), the planting clutch C of the control device 170 is turned on by the planting clutch actuating means (STEP 3), and the machine body is stopped and the fertilizer 4 and the rice planting device 3 are stopped. Power is transmitted and fertilization and planting work is started.

  Therefore, when the worker planted one seedling by the seedling planting tool 164... When looking at the back, the operator changes the shift lever 90 from the PTO position (C position) to the planting work speed position (B position) ( (Step 4) When the aircraft is advanced by operating forward along the front longitudinal groove 91b, the planting clutch C remains "ON" (STEP 5), so that fertilization and planting can be performed from the edge. Therefore, planting of the headland can be carried out appropriately and efficiently by planting the headland, and supplementary planting work at the beach after the rice planting work by the riding type rice transplanter becomes unnecessary, and the efficiency of the rice planting work is improved. .

  In the operation of the shift lever 90, the guide groove 91 of the shift lever 90 is provided with the PTO position (C position) and the planting work speed position (B position) adjacent to each other. From the position (C position) to the planting work speed position (B position), the operation of moving forward by moving forward along the front longitudinal groove 91b can be performed easily and quickly. Work can be done.

  FIG. 12 is provided with a traveling clutch 96 for stopping the aircraft while power is transmitted to the fertilizer application device 4 and the rice planting device 3 so that seedlings can be planted from the edge of the headland in the headland planting operation. An example is shown.

  In other words, a traveling tertiary shaft 97 is provided in the transmission case 11, and a gear G30 that meshes with the gear G6 is provided on the traveling tertiary shaft 97 so as to freely rotate, and is slidably fitted with the traveling tertiary shaft 97 by a spline. A traveling clutch operating body 98 that rotates integrally is provided. A travel clutch 96 is configured by engaging and releasing an engagement portion integrally formed on one side of the gear G30 and an engagement portion integrally formed on one side of the travel clutch operating body 98.

  The travel clutch actuating body 98 is operated by depressing a travel clutch pedal (not shown) provided on the front cover 19a on the right side (opposite to the brake pedal 140) of the steering handle 16 of the traveling vehicle 1 and shifter 99. And the engagement portion between the gear G30 and the travel clutch operating body 98 is separated, and the travel clutch 96 is disengaged.

  A gear G31 that rotates integrally with the traveling tertiary shaft 97 is engaged with the gear G21, and is configured to drive the left and right front wheels 6 and 6 and the left and right rear wheels 7 and 7. Further, the travel clutch operating body 98 is biased toward the gear G30 by the spring 100 (when the travel clutch pedal is not depressed, the gear G30 and the travel clutch operating body 98 are Is engaged).

  A procedure for planting a headland with the above-described riding type rice transplanter will be described below.

  First, on the headland, when the lower switch 90D provided on the grip 90a of the speed change lever 90 is pushed with the rear part of the machine body (the rear part of the rice transplanter 3) closest to the heel, the rice transplanter is lifted by the rice transplanter lifting means of the controller 170. The device 3 is lowered until its center float 165, side float 166, etc. are in contact with the farm scene. Therefore, the travel clutch 96 is disengaged by depressing the travel clutch pedal with the left foot. Then, when the shifting lever 90 is set to the planting work speed position (B position) and the depression switch 90D is pushed, the planting clutch C of the controller 170 is turned on. When the shift lever 90 is operated forward along the front vertical groove 91b, the power is transmitted to the fertilizer application device 4 and the rice planting device 3 while the machine body is stopped, and fertilization and planting work are started.

  Therefore, the operator stops the operation of depressing the traveling clutch pedal when the seedling planting tool 164... The aircraft can then move forward and perform normal fertilization and planting operations. In this way, fertilization and planting work can be performed appropriately and efficiently from the shoreline, and supplementary vegetation work at the shoreline after the rice transplanting work by the riding type rice transplanter is not required, and the efficiency of the rice transplanting work is improved. Alternatively, the aircraft may be completely stopped by depressing the brake pedal 140 with the right foot until the seedling planting tool 164.

  FIG. 13 shows an example in which the travel clutch 96 is operated by the operation lever 101 instead of the means for operating the travel clutch 96 of the third embodiment by the travel clutch pedal.

  That is, the operation lever 101 is provided on the left side (opposite to the speed change lever 90) of the steering handle 16, and when the operation lever 101 is set to the “on” position, the engaging portion between the gear G30 and the travel clutch operating body 98 is engaged. When the operating lever 101 is set to the “OFF” position against the biasing force of the spring 100, the engaging portion between the gear G30 and the travel clutch operating body 98 is separated and the travel clutch 96 is disconnected. It is configured as follows. In addition, when the operation lever 101 is set to the “lock” position, the engagement portion between the gear G30 and the travel clutch operating body 98 is separated so that the state where the travel clutch 96 is disengaged can be maintained.

  A procedure for planting a headland with a riding type rice transplanter having this configuration will be described. First, on the headland, the rear part of the machine body (the rear part of the rice transplanter 3) is brought closest to the heel to the grip 90a of the speed change lever 90. When the provided lowering switch 90D is pushed, the rice planting device 3 is lowered by the rice planting device lifting means of the control device 170 until the center float 165, the side float 166, etc. come in contact with the field scene. Therefore, the travel clutch 96 is disengaged by pushing down the operation lever 101 from the “ON” position to the “OFF” position with the left hand. Then, when the shifting lever 90 is set with the right hand to the planting work speed position (B position) and the lowering switch 90D is pushed, the planting clutch C of the control device 170 is turned on. When the shift lever 90 is operated forward along the front vertical groove 91b, the power is transmitted to the fertilizer application device 4 and the rice planting device 3 while the machine body is stopped, and fertilization and planting work are started.

  Therefore, when the operator looks at the back and plantes one seedling with the seedling planting tool 164..., When the left-hand operation lever 101 is released, the operation lever 101 is in the “on” position and the aircraft moves forward. Normal fertilization and planting work. In this way, fertilization and planting work can be performed appropriately and efficiently from the shoreline, and supplementary vegetation work at the shoreline after the rice transplanting work by the riding type rice transplanter is not required, and the efficiency of the rice transplanting work is improved.

  Further, in this embodiment, when the operation lever 101 is set to the “locked” position, the engagement portion between the gear G30 and the travel clutch operating body 98 is separated to maintain the state where the travel clutch 96 is disconnected. Therefore, a simple configuration in which the PTO position (C position) of the transmission lever 90 is eliminated can be achieved. That is, when only the fertilizer application device 4 and the rice transplanting device 3 are desired to be driven, the operating lever 101 is set to the “locked” position, the traveling clutch 96 is disengaged, and the transmission lever 90 is set to the B position along the front vertical groove 91b. When operated forward, the hydraulic continuously variable transmission HST is shifted so that the forward speed is increased from the neutral, and the rice transplanter 3 and the fertilizer 4 can be operated while the machine is stopped.

  FIG. 14 shows an example in which a planar step 102 is fixed to the rear part of the cockpit seat 20, and the backrest portion 20a of the cockpit seat 20 is rotatable forward about the rotation axis 20b, and the backrest portion 20a is The step 102 is fixed to the back surface with bolts. A number of anti-slip ridges are formed on the surface of step 102.

  Therefore, at the time of normal rice transplanting work, the backrest 20a is set up as shown by the solid line in FIG. 14, and the operator sits on the cockpit 20 and operates the aircraft. And at the time of various operation with respect to the rice planting apparatus 3 and the fertilizer application 4, supply of the preliminary seedling to the seedling mounting stand 163, and the fertilizer supply to the fertilizer application apparatus 4, an operator moves on the front cover 19a on both right and left sides of the cockpit 20 The various operations on the left and right sides of the rice planting device 3 and the fertilizer application device 4 and the supply of the spare seedlings and the fertilizer supply to the fertilizer applicator 4 are performed. The backrest 20a is rotated forward as shown by the phantom line in FIG. When the step 102 is horizontal, the operator can easily put various feet on the step 102 and perform various operations on the center of the rice transplanter 3 and the fertilizer 4, supply of the seedlings, and supply of fertilizer to the fertilizer 4. However, it is possible to move through this step 102 from the left side to the right side (or from the right side to the left side) behind the aircraft, so that the work can be performed efficiently and safely.

  The present invention can be applied to any seedling transplanter such as a grass transplanter other than the riding type rice transplanter shown in the above-described embodiment.

It is a whole side view showing an 8-row planting type rice transplanter. (Example 1) It is a whole top view of a riding type rice transplanter. (Example 1) It is a schematic plan view which shows the transmission structure of a traveling vehicle. (Example 1) It is an expanded sectional view of the transmission composition of a traveling vehicle. (Example 1) It is a side view of the transmission structure of a traveling vehicle. (Example 1) It is a side view of the transmission case 11 and the hydraulic continuously variable transmission HST. (Example 1) FIG. 6 is an operation explanatory view showing the relationship between the operation position of the transmission lever 90 and the position of the transmission gear in the transmission case 11. (Example 1) It is a block circuit diagram of a control system. (Example 1) FIG. 6 is a view showing the front and left sides of a grip portion 90a of a transmission lever 90. (Example 1) It is a control flowchart. (Example 1) It is a control flowchart which shows another example. (Example 2) It is an expanded sectional view of the transmission composition of the traveling vehicle which shows other examples. Example 3 It is a perspective view of the operation lever which shows another example. (Example 4) It is a whole side view of the riding type rice transplanter which shows another example. (Example 5)

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Passenger type traveling vehicle 2 Linking device for raising / lowering 3 Transplanting device (rice transplanting device)
11 Mission case 12 Engine 90 Shift lever 90D Operating device (Descent switch)
93 PTO clutch 164 Seedling planting tool 180 Seedling planting tool position detection means (position detection sensor for seedling planting tool)
C Planting clutch C position Operation region for driving only the transplanting device 3 without advancing the machine body B position Operating region for driving the machine body while driving the transplanting device 3

Claims (3)

  In a seedling transplanting machine provided with a speed change lever 90 for changing the traveling speed of the airframe and a planting clutch C for stopping the operation of the transplanting device 3, an operation region for moving the airframe forward while driving the transplanting device 3 to the speed change lever 90 A seedling transplanting machine characterized in that an operating region for driving only the transplanting device 3 without moving the machine body is provided, and an operating device 90D for operating the planting clutch C is provided on the shift lever 90.   If the seedling planting tool position detection means 180 detects that the seedling planting tool 164 is a position for planting seedlings in the soil while the machine is stopped, the control means for disconnecting the drive to the transplanting device 3 by disengaging the PTO clutch 93. The seedling transplanting machine according to claim 1, further comprising a control means for driving the transplanting device 3 by inserting the PTO clutch 93 by detecting the advance of the machine body.   The shift lever 90 is provided with “an operation region in which only the transplanting device 3 is driven without advancing the machine” and “an operation region in which the aircraft is advanced while driving the transplanting device 3” adjacent to each other. The seedling transplanter according to claim 1 or claim 2.

Images