JP2011062173A - Rice transplanter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice transplanter capable of saving the power a fanning means while the fanning means is put to a proper operative condition correspondingly to circumstances such as pausing seedling delivery operation and planting operation. <P>SOLUTION: The rice transplanter 1 with a planting section 40 linked liftably to a traveling section 10 includes: a main variable-speed lever 52; a microswitch 85 detecting that the main variable-speed lever 52 is at a seedling delivery position P3; a fertilizer applicator 22 having a hopper 25, an unloading mechanism 26 and a blower 27; a selective switch 77 for selecting the blower 27's operating mode, when the main variable-speed lever 52 is operated at the seedling delivery position P3, to one of a halting mode or an operating mode at low-fanning levels; and a control unit 80 putting the blower 27 to a halting mode or an operating mode at low-fanning levels based on the selection by the selective switch 77, when controlling operation of the blower 27, and it is detected that the main variable-speed lever 52 is operated to the seedling delivery position P3 by the microswitch 85. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to the technology of a rice transplanter, and more particularly, to the technology of a rice transplanter that stops air blowing means of a fertilizer application device during seedling joining work.

Conventionally, a rice transplanter equipped with a fertilizer for performing fertilization simultaneously with planting has been known. The fertilizer application device includes a hopper that stores fertilizer, a feeding unit that is disposed at a lower portion of the hopper and feeds the fertilizer by a predetermined amount, and a blower unit that transports the fertilizer to the fertilization position by wind power.
The blower, which is a blowing means, is operated by a motor and is activated when the engine is started. The blower is a means for conveying fertilizer fed by the feeding means from the hopper to the fertilization position by wind power during planting work. For example, since this blowing means does not plant at the time of seedling passage, it is not necessary to convey the fertilizer to the fertilization position, and it is not necessary to operate the blower. In view of this, a technique for stopping the operation of the blower when the main shift lever, which is a travel shift operating means, is operated to the seeding position is known (see, for example, Patent Document 1).

JP-A-8-70663

  However, depending on the size of the field (reciprocating distance), the stopping of the seedling, and the situation where the seedling is carried out by multiple people, it may take a long time or be completed in a short time. There is a case. In the conventional configuration where the operation of the blower is stopped with the main shift lever as the seeding position, when the seedling operation is completed in a short time and the planting operation is resumed quickly, the rotation speed of the blower is the original. It takes time to return to the rotational speed of the blower, and the air volume of the blower is insufficient, and a predetermined amount of fertilizer may not be conveyed. On the other hand, if there is a seedling joining operation at the end of the field, an operation of supplying a seedling mat to the auxiliary seedling stand, an operation of supplying fertilizer to the hopper of the fertilizer application machine, etc., the work time becomes longer, so the blower is stopped. The battery consumes less power and can reduce noise. Also, the interruption of planting work has a long and short work time.

  Then, in view of the subject which concerns, this invention provides the rice transplanter which can aim at the power-saving of an air blower, setting an air blower as a suitable operation state according to situations, such as a seedling joining operation | work or a planting operation interruption. .

  The problem to be solved by the present invention is as described above. Next, means for solving the problem will be described.

  That is, according to the first aspect, in the rice transplanter in which the planting part is connected to the traveling part so as to be able to move up and down, the traveling speed change operating means operable to a plurality of speed change operation positions including the seedling position, and the traveling speed change A shift operation position detecting means for detecting that the operating means is at the seedling joining position, a hopper for storing fertilizer, a feeding means for feeding the fertilizer by a predetermined amount arranged at the lower part of the hopper, and the fed fertilizer to the fertilization position A fertilizing apparatus having an air blowing means for conveying, and an operation state of the air blowing means when the traveling speed change operating means is operated at a seeding position for selecting one of a stopped state and an operating state with a low air volume. Selection operation means, traveling state detection means for detecting whether or not the rice transplanter is in a traveling state, and operation of the air blowing means are controlled so that the traveling speed change operation means is transferred by the shift operation position detection means. When it is detected that the vehicle has been operated to the position or the neutral position, or when it is detected that the running state is stopped by the running state detecting unit, the blowing unit is stopped or the low air volume is selected based on the selection by the selecting unit. And a control device for setting the operating state at.

  In Claim 2, it has a timer means which measures the elapsed time from the time when the said operation means for driving | running | working transmission was operated to the seedling joint position, The said control apparatus is the operation state by the said selection operation means in low air volume. Is selected, based on the measurement result of the timer means, the blower means when a preset first set time or more has elapsed from the time when the travel speed change operating means is operated to the seedling position Is switched from an operating state with a low airflow to a stopped state.

  In Claim 3, It comprises the raising / lowering position detection means which detects the position of the said planting part, The said control apparatus raised the position of the planting part detected by the said raising / lowering position detection means more than the setting height If it is determined whether or not it has risen above the set height above the set height, the blowing means is put into an operating state with a low air volume.

  According to a fourth aspect of the present invention, there is provided timer means for measuring an elapsed time from the time point when the traveling speed change operating means is operated to the seedling joining position, and the control device is configured based on a measurement result of the timer means. From the time when the traveling speed change operating means is operated to the seeding position, until the preset second set time elapses, the operating state of the air blowing means is not changed, and when the second set time or more elapses The air blowing means is brought into a stopped state or an operating state with a low air volume based on the selection by the selection means.

  As effects of the present invention, the following effects can be obtained.

  In claim 1, it is possible to alternatively select a stopped state or an operating state with a low air volume as the operating state of the blowing means of the fertilizer application device during the seedling joining operation. Therefore, the worker can select the stopped state or the low air volume according to the time required for the seedling joining operation, and when the stopped state is selected, the power saving of the blower unit can be effectively achieved. On the other hand, when an operation state with a low air volume is selected, fertilization work is performed in accordance with returning to planting work after seedling joining work while reducing power consumption of the air blowing means in a state where feeding of fertilizer is stopped. It can be resumed promptly. That is, it is possible to achieve power saving of the air blowing means while setting the air blowing means to an appropriate operating state according to the situation at the time of seedling work.

  In claim 2, if the seedling joining work is finished within the first set time, the planting work can be resumed quickly. If the seedling joining work is not finished within the first set time, the air blowing means is operated with a low air flow rate. It is possible to automatically change from a state to a stopped state. Therefore, the air blowing unit is not operated in vain and power saving can be achieved. Further, since the first set time can be set by a timer, it can be set to an arbitrary time according to the work speed, work amount, etc. of the worker.

  In claim 3, in order to reduce the air volume of the blowing means when the planting part is raised to perform work other than the seedling-joining work and the planting / fertilization work is interrupted or when turning at the field end, etc. Thus, the fertilization work can be promptly restarted after the work while reducing the power consumption of the air blowing means.

  In claim 4, when the operation means for traveling speed change is operated to the seedling joining position and the fertilization work is interrupted, even if the feeding means of the fertilizer application is stopped, the blowing means remains until the second set time elapses. It becomes possible to operate, and the fertilizer remaining in the transfer pipe from the feeding means to the fertilization position can be discharged reliably. Therefore, it is possible to eliminate the possibility that the transport pipe is clogged by the remaining fertilizer.

The side view which shows the whole rice transplanter structure concerning one Embodiment of this invention. The top view which shows the whole structure of the rice transplanter which concerns on one Embodiment of this invention. The side schematic diagram of the dashboard of the rice transplanter concerning one embodiment of the present invention. The figure which looked at the dashboard of the rice transplanter concerning one embodiment of the present invention from the driver's seat side. The rear perspective view of the dashboard of the rice transplanter concerning one embodiment of the present invention. The top view of the guide groove of the rice transplanter which concerns on one Embodiment of this invention. The block diagram which shows the control apparatus of the rice transplanter which concerns on one Embodiment of this invention. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 1st embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 2nd embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 2nd embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 3rd embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 4th embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 4th embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 5th embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 6th embodiment. The control flow figure of the blower 27 at the time of the seedling joint work which concerns on 6th embodiment.

  First, the whole structure of the rice transplanter 1 which concerns on one Example of this invention is demonstrated using FIG. 1, FIG. In the present embodiment, the rice transplanter is an eight-row planter, but this is not particularly limited, and a six-plant or ten-row planter may be used.

  As shown in FIG. 1, the rice transplanter 1 includes a traveling unit 10 and a planting unit 40, and is configured so that seedlings can be planted in a field by the planting unit 40 while traveling by the traveling unit 10. The The planting part 40 is arrange | positioned behind the traveling part 10, and is connected with the rear part of this traveling part 10 via the raising / lowering mechanism 30 so that raising / lowering is possible.

  In the traveling unit 10, the engine 14 is provided at the front portion of the vehicle body frame 11 and is covered with a bonnet 15. The transmission case is supported by the front portion of the vehicle body frame 11 and is disposed below the engine 14.

  The front axle case 6 is supported on the front portion of the vehicle body frame 11, and the front wheels 12 are attached to both the left and right sides of the front axle case 6. The rear axle case 7 is supported on the rear portion of the vehicle body frame 11, and the rear wheels 13 are attached to both the left and right sides of the rear axle case 7.

  The power transmission mechanism transmits the power of the engine 14 to the left and right front wheels 12 and the left and right rear wheels 13 through the transmission case, respectively, so that the front wheels 12 and the rear wheels 13 rotate. Configured. Thereby, the traveling unit 10 can travel forward or backward.

  In the traveling unit 10, a driving operation unit is provided in the middle part of the vehicle body frame 11 before and after. An annular steering handle 18 for steering operation, a shift pedal for shifting operation, and the like are disposed in front of the driving operation unit. A driver's seat 19 is disposed behind the steering handle 18 at the rear of the driving operation unit.

  In addition, around the steering handle 18 and the driver's seat 19 of the driving operation unit, a dashboard 17, a vehicle body cover 16 having a part of the step for getting on and off, and other operating tools such as a lever and a switch are arranged. With the steering handle 18, the shift pedal, and other operating tools, it is possible to perform appropriate operations on the traveling unit 10 and the planting unit 40.

  In the traveling unit 10, the preliminary seedling mounts 24 are attached to the respective attachment frames 23 erected from the left and right sides of the front portion of the body frame 11, and are arranged on the left and right sides of the bonnet 15. And a reserve seedling is mounted in the reserve seedling mounting stand 24, and the seedling supply to the planting part 40 is attained.

  In the traveling unit 10, the fertilizer 22 is supported on the rear part of the vehicle body frame 11 via the support frame 20 and the like, and is disposed behind the driver seat 19 of the driving operation unit. The fertilizer application device 22 is configured to be operated by power from the engine 14 and to perform fertilization on a farm field.

  The fertilizer application device 22 includes a hopper 25 that stores fertilizer, a feeding mechanism 26 that is a feeding unit, a blower 27 that is a blowing unit, and a conveyance hose 28 that is a conveyance pipe.

  The hopper 25 is a container for accommodating granular fertilizer in each strip, and is provided in the same number as the number of planting strips, that is, eight in this embodiment. Further, the fertilizer stored in the hopper 25 is configured to be fed out from the outlet of the hopper 25 by a predetermined amount by the feeding mechanism 26.

  The feeding mechanism 26 is disposed below the hopper 25. Further, the feeding mechanism 26 is operated by power from the engine 14 via a feeding power transmission mechanism (not shown), and drops the fertilizer to the transport hose 28 by a certain amount.

  The blower 27 is a device that sends air into a blower pipe (not shown). The blower 27 is a blower that is operated by the rotation of an electric motor, and the operation of the blower 27 is controlled by a control device 80. Further, the wind sent from the blower 27 passes through the blower pipe and is sent into the respective transport hoses 28.

  The conveyance hose 28 is extended from the feeding mechanism 26 to the fertilization position in the vicinity of the planting position by a planting claw 45 described later for each strip, and is provided in the same number as the number of planting strips, that is, eight in this embodiment. . The transport hose 28 guides the fertilizer that has fallen from the feeding mechanism 26 to each strip. Each transport hose 28 is connected to a blower pipe, and the wind sent from the blower 27 flows into the transport hose 28 through the blower pipe.

  In such a configuration, the fertilizer supplied from the hopper 25 into the transport hose 28 by the feeding mechanism 26 is transported to the vicinity of the planting position via the transport hose 28 by the wind supplied from the blower 27, and enters the field. Released. In this way, the fertilizer is applied to the field by the fertilizer application device 22.

  In the planting part 40, a planting mission case is supported near the lower center of the planting frame 49, and a transmission shaft case extends from the planting mission case to the left and right sides. Four planting transmission cases 46 are respectively extended rearward from the transmission shaft case and arranged at appropriate intervals in the left-right direction.

  A rotary case 44 is rotatably supported on the left and right sides of the rear end portion of each planting transmission case 46. The number of the rotary cases 44 is the same as the number of planting strips, that is, eight in this embodiment. Then, the two planting claws 45 are attached to both sides of the rotary case 44 in the longitudinal direction so as to sandwich the rotation fulcrum of the rotary case 44.

  The seedling table 41 is disposed above the planting transmission case 46 in a tilted state with a front height and a rear height, and is attached to the rear portion of the planting frame 49 so as to be capable of reciprocating in the left-right direction via upper and lower guide rails. The seedling table 41 can be reciprocated horizontally by a lateral feed mechanism (not shown).

  The seedling mounting bases 41 having a plurality of (eight) seedling mat mounting portions are arranged in the left-right direction so that each lower end side faces one rotary case 44. Then, the seedling mat is placed on each seedling stage 41, and one seedling can be cut from the seedling mat on the seedling stage 41 by the planting claws 45 when the rotary case 44 rotates.

  A seedling vertical feed belt 47 according to the number of strips is provided on the seedling mount 41. The seedling vertical feed belt 47 can be operated so as to vertically feed the seedling mat on the seedling stage 41 downward by the vertical feed mechanism every time the seedling stage 41 reaches the stroke end of the left and right reciprocating horizontal feed. Is done.

  The power of the engine 14 is transmitted to each rotary case 44 via a planting mission case or the like, and the rotary case 44 is configured to rotate. Thereby, with the rotation operation of the rotary case 44, the two planting claws 45 can alternately take out the seedlings from the seedling mat on the seedling mount 41 and plant them in the field.

  At the same time, the power of the engine 14 is transmitted to the horizontal feed mechanism and the vertical feed mechanism through a planting mission case or the like, and the seedling table 41 is reciprocated horizontally by the horizontal feed mechanism. Is vertically fed by the vertical feed mechanism via the seedling vertical feed belt 47 in accordance with the left and right reciprocating horizontal feed of the mounting table. Thereby, the seedling mat on the seedling placing table 41 is moved to an appropriate position with respect to the planting claws 45.

  Here, the power transmission mechanism for transmitting power from the engine 14 to the fertilizer 22, the rotary case 44, the lateral feed mechanism and the vertical feed mechanism includes a planting clutch, and the engine according to the connection / disconnection of the planting clutch. Is transmitted to the seedling vertical feed belt 47 and the rotary case 44 or is not transmitted. The connection / disconnection of the planting clutch is switched by operation of the line stop switches 62, 63, 64, and 65 described later.

  In the planting part 40, the left and right center floats 42 for leveling the farm scenes for the two central strips and the left and right side floats 43 for leveling the farm scenes for the two right and left strips are respectively provided in the front part. The side is supported on the planting frame 49 side so as to be movable up and down with the rear side as a rotation fulcrum, and is disposed below the planting transmission case 46.

  In the planting part 40, the drawing marker 48 is supported rotatably on both the left and right sides of the lower part of the planting frame 49. Each of the left and right line drawing markers 48 is stored by being rotated upward with the base end side as a rotation fulcrum, and the tip side is left or left by being rotated downward from this stored state. It is configured so that it can be drawn to the field by protruding rightward.

  Further, the lifting mechanism 30 described above is provided between the traveling unit 10 and the planting unit 40. Specifically, the top link 31 and the lower link 32 are installed between the traveling unit 10 and the planting unit 40, and the lifting cylinder is connected between the lower link 32 and the traveling unit 10. And the planting part 40 can be rotated to the up-down direction with respect to the traveling part 10, that is, can be raised or lowered, by the expansion and contraction operation of the lifting cylinder.

  Next, the dashboard 17 and the configuration around it will be described with reference to FIGS. 3, 4, and 5.

  In the following description, the surface formed by the upper surface of the dashboard 17 is a dashboard surface 17a, the surface formed by the upper surface of the steering handle 18 is the handle surface 18a, and the surface formed by the upper surface of the planting operation panel 51 is formed. Is the planting operation panel surface 51a, and the surface formed by the upper surface of the display panel 50 is the display panel surface 50a.

  As shown in FIGS. 1 and 3, the column 8 is erected in the vicinity of the rear portion of the bonnet 15, and the dashboard 17 is stretched over the column 8. An annular steering handle 18 is disposed above the dashboard 17 and connected to a protruding end portion of the handle shaft 9 protruding upward from the dashboard surface 17a.

  The dashboard surface 17 a is formed in a state of being inclined downward and rearward so as to be lower in front and rear in a side view, and is an inclined surface inclined downward toward the driver's seat 19. The handle shaft 9 is arranged so that the axial direction of the dashboard surface 17a is orthogonal to the dashboard surface 17a. A planting operation panel 51 and a display panel 50 are disposed on the dashboard surface 17a.

  As shown in FIGS. 3, 4, and 5, the display panel 50 is disposed on the dashboard surface 17 a in front of the handle shaft 9 and at a substantially central portion in the left-right direction of the dashboard surface 17 a. The display panel 50 is configured by a substantially rectangular screen whose longitudinal direction is directed to the left and right, and configured to be able to display the work status in the planting unit 40.

  In addition, a substantially rectangular planting operation panel 51 is provided behind the handle shaft 9 on the dashboard surface 17a. The planting operation panel surface 51a is provided with planting operation means used during planting work. Preferably, the operation means for planting is provided with an operation means that is frequently used during planting work.

  In the present embodiment, the stapling operation unit 60, the sensitivity volume 55, and the buzzer stop switch 56 are arranged on the planting operation panel surface 51a as planting operation means. An engine key insertion port 57 is disposed on the planting operation panel surface 51a. The planting operation means arranged on the planting operation panel surface 51a is not limited to these.

  The display panel surface 50a of the display panel 50 and the planting operation panel surface 51a of the planting operation panel 51 are disposed on the dashboard surface 17a at the front and back with the handle shaft 9 interposed therebetween, and are inclined surfaces substantially parallel to each other in a side view. It is said that. When viewed from the operator seated in the driver's seat 19, the display panel surface 50 a is positioned on the inner peripheral side of the annular steering handle 18, and the planting operation panel surface 51 a is positioned near the rear portion of the steering handle 18. It is like that.

  As shown in FIGS. 4 and 5, the hooking operation unit 60 that is the hooking operation means includes an automatic marker switch 61 and hooking switches 62, 63, 64, and 65. The automatic marker switch 61 and the anchoring switches 62, 63, 64, and 65 are arranged in order from the left side with a predetermined interval in the left-right direction from each adjacent switch.

  The automatic marker switch 61 keeps the appropriate adjacent streak at the time of planting work, and puts in and out (projects or stores) the drawing marker 48 which draws a line on the upper surface of the field so as to be a straight advance target. Accordingly, it is a switch that is set to automatically switch between left and right.

  The row stop switches 62, 63, 64, 65 are switches that operate the fertilizer application 22 and the planting clutch described above. By operating the streak switch 62, 63, 64, 65 once, the streak clutch of the fertilizer application 22 is disengaged, the planting clutch is activated and disengaged, and the strip feeding mechanism 26 corresponding to the operated switch. The power is not transmitted to the seedling vertical feed belt 47 and the rotary case 44, and the feeding mechanism 26, the seedling vertical feed belt 47 and the rotary case 44 are stopped. In this state, by operating the streak switch 62, 63, 64, 65 again, the planting clutch is actuated and brought into contact, and the strip feeding mechanism 26 and the seedling vertical feed belt 47 corresponding to the operated switch Power is transmitted to the rotary case 44, and the feeding mechanism 26, the seedling vertical feed belt 47, and the rotary case 44 are operated.

  The sensitivity volume 55 adjusts the sensitivity according to the hardness of the field, and adjusts the lifting / lowering operation of the lifting / lowering actuator with respect to the signal from the float sensor to be insensitive when it is hard and sensitive when it is soft. Is.

  The buzzer stop switch 56 is recognized by the operator when an alarm buzzer provided in the traveling unit 10 or the planting unit 40 sounds for a planting clutch alarm, seedling alarm, fertilizer supply alarm, fertilizer clogging alarm, etc. This is a switch for manually stopping the alarm buzzer.

  The engine key insertion port 57 is a hole into which a key is inserted in order to turn on the power and start the engine 14. When the operator inserts the key and turns the power source from the ON position to the start position, the cell motor rotates and the engine 14 starts.

  As described above, the planting operation means including the barbing operation unit 60, the sensitivity volume 55, and the buzzer stop switch 56 is disposed on the planting operation panel surface 51a, while the operation means other than the planting operation means is a dash. Arranged on the board surface 17a.

  On the left side of the steering handle 18 and the planting operation panel 51, a main speed change lever 52, which is a travel speed change operating means, is arranged. The main speed change lever 52 is operated along a guide groove 52a formed on the dashboard surface 17a, and the traveling mode of the rice transplanter 1 is set to “Move”, “Low speed forward”, “Reverse”, “Seedling”, “Neutral” "Is an operation means for switching to each travel mode.

  As shown in FIG. 6, the guide groove 52a includes a groove 52b having a predetermined width in the front-rear direction, a groove 52c having a predetermined width in the left-right direction, and a groove 52d having a predetermined width in the front-rear direction. The groove 52c is connected to the groove 52b and extends rightward from the front and rear central portions of the groove 52b. The groove 52d is connected to the groove 52b at a position shifted to the right side of the groove 52b, and extends forward from the right side of the front end portion of the groove 52b.

  The region of the rear end portion of the guide groove 52a, that is, the region of the rear end portion of the groove 52b is set to the reverse position P1. When the main transmission lever 52 is operated to the reverse position P1, the travel mode is switched to “reverse”, and the rice transplanter is in a state where it can travel backward.

  The central portion outer side portion of the guide groove 52a, that is, the region of the front end portion of the groove 52b is set to the low speed advance position P2. When the main speed change lever 52 is operated to the low speed forward position P2, the travel mode is switched to “low speed forward”, and the rice transplanter is allowed to travel forward at low speed.

  The area on the right side between the low speed forward position P2 and the reverse position P1 of the guide groove 52a, that is, the right end area of the groove 52c is set to the seedling joining position P3. When the main transmission lever 52 is operated to the seedling joining position P3, the traveling mode is switched to "seedling joining", the transmission of power to the front wheels 12 and the rear wheels 13, the seedling vertical feed belt 47, and the rotary case 44. Then, the transmission of power to the feeding mechanism 26 is stopped. This traveling mode is selected when the operator leaves the driver's seat 19 and performs seedling on the seedling stage 41 during planting work.

  An intermediate region between the reverse position P1 and the low-speed forward position P2 of the guide groove 52a, that is, an approximately central portion in the front and rear direction of the groove 52b and a central portion near the connection portion with the groove 52c is set to the neutral position P4. . The region other than the front end portion and the rear end portion of the guide groove 52a is a neutral region.

  The region of the front end portion of the guide groove 52a, that is, the region of the front end portion of the groove 52d is set at the movement position P5. When the main transmission lever 52 is operated to the movement position P5, the traveling mode is switched to “move”, and the rice transplanter 1 is ready to travel forward. This traveling mode is selected mainly when the rice transplanter 1 is traveling on a road or the like.

In the guide groove 52a, a micro switch 85 serving as a shift operation position detecting means is disposed at the edge of the groove 52c at the seedling joining position P3. When the main transmission lever 52 is operated to the seeding position P3, the micro switch 85 comes into contact with the main transmission lever 52 and can be switched ON / OFF.
Further, in the guide groove 52a, a neutral position sensor switch 86 serving as a shift operation position detecting means is disposed at the edge of the groove 52b at the neutral position P4. The neutral position sensor switch 86 senses the position of the main transmission lever 52 and can be switched ON / OFF when the main transmission lever 52 is operated to the neutral position P4.

  Further, as shown in FIGS. 4 and 5, a speed fixing lever 53 is provided on the handle shaft 9 of the steering handle 18. The speed fixing lever 53 is an operating means that is operated when the traveling unit 10 reaches a desired traveling speed by the operation of the shift pedal, so that the traveling unit 10 can travel while maintaining the traveling speed. .

  A hydraulic planting lever 54 is provided on the right side of the steering handle 18. The hydraulic planting lever 54 is an operation means for performing operations of raising and lowering the planting unit 40, planting on / off, and shifting at the time of planting.

  In addition, what is arrange | positioned on the dashboard surface 17a is not limited to the above operation means, The arrangement | positioning of an operation means is not limited to the arrangement | positioning shown in FIG. 4, FIG. As other operation means arranged on the dashboard surface 17a, for example, there are a speed selection switch 71, a combination switch 72, a hydraulic stop switch 73, a planting part inclination setting device 74, a field condition switch 75, and a seesaw switch 76.

  The speed selection switch 71 is an operation means for switching the speed of the rice transplanter 1 to each speed mode of “low speed”, “medium speed”, and “standard”. The speed selection switch 71 is disposed near the display panel 50 between the display panel 50 and the planting operation panel 51 and on the left side of the handle shaft 9.

  The combination switch 72 is operation means having a horn button, a flasher switch, and a light switch. The combination switch 72 is disposed near the planting operation panel 51 between the display panel 50 and the planting operation panel 51 and on the left side of the handle shaft 9.

  In combination switch 72, when a horn button at the center is pressed, an alarm (horn) sounds. When the substantially rectangular parallelepiped-shaped flasher switch located below the horn button is rotated left and right, the flasher lamp (direction indicator) on the rotated side blinks. The flashing of the flasher lamp can inform the turning direction of the rice transplanter 1. When the light switch having a substantially rectangular parallelepiped shape located on the left side of the horn button is rotated forward, the headlamp is turned on.

  The hydraulic stop switch 73 is an operating means used to stop the flow of the oil passage for ascending / descending the planting part 40 and fixing the elevation height of the planting part 40. The hydraulic stop switch 73 is disposed near the planting operation panel 51 between the display panel 50 and the planting operation panel 51 and on the right side of the handle shaft 9.

  The planting part inclination setting device 74 is an operation means for setting the angle of the planting part 40 with respect to the horizontal direction by controlling the hydraulic pressure. The planting part inclination setting device 74 is disposed near the display panel 50 between the display panel 50 and the planting operation panel 51 and on the right side of the handle shaft 9.

  The field condition switch 75 is an operation means for setting the planting depth according to the state of each field of “deep water”, “standard”, and “headland”. The field condition switch 75 is disposed on the right side of the display panel 50 and in front of the hydraulic planting lever 54.

  The seesaw switch 76 is an operating means for keeping the planting part 40 horizontal in the front-rear direction under the control of a motor. The seesaw switch 76 is arranged side by side with the field condition switch 75 on the right side of the display panel 50 and in front of the hydraulic planting lever 54.

  The selection switch 77 is a selection means for selecting whether to stop the air blowing from the blower 27 or to operate with a low air volume when the main speed change lever 52 is operated to the seedling position P3. is there. The selection switch 77 is disposed on the right side of the display panel 50 and in front of the field condition switch 75 and the seesaw switch 76. However, the arrangement position is not limited.

  Next, a blower control circuit that controls operation and stop of the blower 27 that is a blowing means of the fertilizer application apparatus 22 will be described.

  As shown in FIG. 7, the rice transplanter 1 includes a control device 80 that controls the operation of the blower 27, the engine 14, and the like. However, connection with electrical parts such as the engine 14 is omitted. A motor of the blower 27 is connected to the output side of the control device 80. On the other hand, on the input side of the control device 80, a selection switch 77, a timer 81 which is a timer means, a lift position detection sensor 82 which is a lift position detection means, a micro switch 85, a neutral position sensor switch 86, and a travel A traveling speed sensor 87, which is a state detecting means, is connected.

  The timer 81 measures the time t from when the blower 27 is in a working state with a low air flow, and when the time t is equal to or longer than the first set time T1, that is, the blower 27 is in a working state with a low air flow. When the first set time T1 has elapsed from the point in time, a signal is transmitted to the control device 80. The timer 81 is connected to a setter 81a for setting the first set time T1 in advance.

  Moreover, the raising / lowering position detection sensor 82 which is an raising / lowering position detection means is attached to the rotation part of the top link 31 or the lower link 32, for example, is comprised by sensors, such as a potentiometer.

  A traveling speed sensor 87, which is a traveling state detecting means, is attached to the mission case. The traveling speed sensor 87 detects the traveling speed of the rice transplanter 1.

[First embodiment]
Next, a method for controlling the blower 27 during the seedling joining operation will be described with reference to FIG.

First, the control device 80 determines whether or not the main transmission lever 52 is at the seeding position P3 (step S10). Here, when the main transmission lever 52 is operated to the seedling position P3, the micro switch 85 is switched from OFF to ON, and therefore the control device 80 determines that the main transmission lever 52 is at the seedling position P3. . The control device 80 determines that the main transmission lever 52 is not in the seedling position P3 when the micro switch 85 is OFF.
When it is determined that the main transmission lever 52 is not at the seedling position P3, the control device 80 performs the determination in step S10 again.

  When the main transmission lever 52 is at the seedling position P3, the control device 80 determines whether or not the stop state is selected by the selection switch 77 (step S20). When the stop state is selected by the selection switch 77, the control device 80 stops the blower 27 (step S30).

  Next, the control device 80 determines whether or not the main transmission lever 52 is at the seeding position P3 (step S35). When the main transmission lever 52 is at the seedling joining position P3, the control device 80 performs step S35 again. If the main transmission lever 52 is not at the seeding position P3, the control device 80 operates the blower 27 with a normal air volume (step S36), and performs step S10 again.

  With this configuration, the control device 80 stops the blower 27 when the main transmission lever 52 is operated to the seeding position P3. Thereby, the power saving of the blower 27 can be achieved effectively, and noise can also be reduced.

In step S20, if the stop state has not been selected by the selection switch 77, that is, if the operation state at a low air volume has been selected by the selection switch 77, the timer 81 causes the main transmission lever 52 to be connected. The measurement of the time t at the position P3 is started (step S40), the rotation speed of the motor of the blower 27 is set to low rotation, and the air volume of the blower 27 is set to low air volume (step S45).
Next, the control device 80 determines whether or not the main transmission lever 52 is at the seeding position P3 (step S50). If the main transmission lever 52 is not in the seedling joining position P3, it is determined that the seedling joining operation has returned to the planting operation, the blower 27 is returned to the normal air volume (step S55), and the judgment in step S10 is performed again. When the main transmission lever 52 is at the seedling position P3, it is determined whether or not the time t is equal to or longer than the first set time T1 (step S60), and when the time t is shorter than the first set time T1. The control device 80 makes the determination in step S50 again.

  If it is determined in step S60 that the time t is equal to or longer than the first set time T1, the timer 81 is reset (step S70), and the control device 80 shifts the blower 27 to the stopped state (step S80). .

  Next, the control device 80 determines whether or not the main transmission lever 52 is at the seeding position P3 (step S85). When the main transmission lever 52 is at the seedling joining position P3, the control device 80 performs step S85 again. When the main transmission lever 52 is not in the seedling joining position P3, the control device 80 operates the blower 27 with a normal air volume (step S86), and performs step S10 again.

With this configuration, when the main speed change lever 52 is operated to the seeding position P3, the rotation speed of the motor of the blower 27 is set to a low speed for the first set time T1, and the blower 27 is set to a low air volume. Operate.
When the main transmission lever 52 is operated to a position other than the seeding position P3 during the first set time T1, the control device 80 determines that the operation has returned to work, and returns the air volume of the blower 27 to normal. Operate. If the main transmission lever 52 is maintained in the seeding position P3 even after the first set time T1 has elapsed, the control device 80 shifts the blower 27 to the stop state.
Thereby, fertilizer application | work can be restarted rapidly in connection with returning to a planting operation | work after a seedling joining operation | work, aiming at power saving of the blower 27 in the state which stopped feeding of the fertilizer. That is, power saving of the blower 27 can be achieved while the blower 27 is in an appropriate operating state according to the situation at the time of seedling joining work.
When the operation such as seedling is completed and the main transmission lever 52 is operated from the seedling position P3 to the low speed forward position P2 or the moving position P5, the micro switch 85 is turned OFF and the blower 27 is activated again. The

  The control device 80 determines whether or not the position (height) of the planting unit 40 detected by the lift position detection sensor 82 is above a predetermined position. When the position of the planting part 40 is above the predetermined position, the control device 80 determines that the planting work is not currently being performed, and puts the blower 27 into a working state at a low rotation. is there.

  With this configuration, when the fertilization operation is interrupted by raising the planting unit 40 in order to perform work other than the seedling-joining work, the fertilization work can be performed promptly after the work while reducing the power consumption of the blower 27. It can be resumed.

[Second Embodiment]
When the main transmission lever 52 is operated to the seeding position P3, the blower 27 can be set to the normal air volume until the second set time T2 elapses from this operation.
Therefore, a control method of the blower 27 during the seedling joining operation will be described with reference to FIGS. 9 and 10. In addition, about the part which performs control same as 1st embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.

  The timer 81 measures the time t2 from the time when the blower 27 is in a working state with a low air flow, and when the time t2 is equal to or longer than the second set time T2, that is, the blower 27 is in a working state with a low air flow. When the second set time T2 has elapsed from the point in time, a signal is transmitted to the control device 80. The timer 81 is connected to a setter 81a for setting the set time of the second set time T2 in advance.

  When the main transmission lever 52 is operated to the seeding position P3 in step S10, measurement of the time t2 when the main transmission lever 52 is in the seeding position P3 is started (step S110), and the time t2 is the second set time. It is determined whether or not it is T2 or more (step S120). If it is determined in step S120 that the time t2 is shorter than the second set time T2, that is, the second set time T2 has not elapsed, the determination in step S120 is performed again. In step S120, when it is determined that the time t2 is equal to or longer than the second set time T2, that is, the second set time T2 has elapsed, step S20 is processed, and after step S20, the same control as in the first embodiment is performed. Is to do.

  The second set time T2 is a minute time compared to the first set time T1, and this second set time T2 is fed from the feed mechanism 26 to the fertilizer position by the wind sent from the blower 27. The longer the transport hose 28 is, the longer it is. That is, the second set time T2 is a time to reach the fertilizer position after the fertilizer is fed out, and when the second set time T2 has elapsed, the fertilizer does not remain in the transport hose 28, and the fertilizer is solidified. The possibility of clogging can be eliminated.

  By comprising in this way, when fertilizing work is interrupted, the fertilizer remaining in the conveyance hose 28 of the fertilizer application device 22 can be discharged.

[Third embodiment]
Further, when the main transmission lever 52 is operated to the neutral position P4, the blower 27 can be set to a normal air volume.
Therefore, a control method of the blower 27 by determining whether or not the main transmission lever 52 has been operated to the neutral position P4 will be described with reference to FIG. In addition, about the part which performs control same as 1st embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.
First, the control device 80 determines whether or not the main transmission lever 52 is in the neutral position P4 (step S210). Here, when the main transmission lever 52 is operated to the neutral position P4, the neutral position sensor switch 86 is switched from OFF to ON, so that the control device 80 determines that the main transmission lever 52 is in the neutral position P4. . Control device 80 determines that main shift lever 52 is not in neutral position P4 when neutral position sensor switch 86 is OFF.
When control device 80 determines that main shift lever 52 is not in neutral position P4, it performs the determination in step S210 again.

  When the main transmission lever 52 is in the neutral position P4, the control device 80 determines whether or not the stop state is selected by the selection switch 77 (step S20). When the stop state is selected by the selection switch 77, the control device 80 stops the blower 27 (step S30).

  Next, control device 80 determines whether or not main transmission lever 52 is in neutral position P4 (step S235). When the main transmission lever 52 is in the neutral position P4, the control device 80 performs Step S235 again. When the main transmission lever 52 is not in the neutral position P4, the control device 80 operates the blower 27 with a normal air volume (step S36), and performs step S210 again.

  With this configuration, the control device 80 stops the blower 27 when the main transmission lever 52 is operated to the neutral position P4. Thereby, the power saving of the blower 27 can be achieved effectively, and noise can also be reduced.

In step S20, if the stop state is not selected by the selection switch 77, that is, if the operation state at a low air volume is selected by the selection switch 77, the main shift lever 52 is moved to the neutral position by the timer 81. The measurement of the time t in P4 is started (step S40), the rotation speed of the motor of the blower 27 is set to a low rotation, and the air volume of the blower 27 is set to a low air volume (step S45).
Next, control device 80 determines whether or not main transmission lever 52 is in neutral position P4 (step S250). If the main transmission lever 52 is not in the neutral position P4, it is determined that the seeding operation has returned to the planting operation, the blower 27 is returned to the normal air volume (step S55), and the determination in step S210 is performed again. When the main shift lever 52 is in the neutral position P4, it is determined whether or not the time t is equal to or longer than the first set time T1 (step S60). If the time t is shorter than the first set time T1, The control device 80 makes the determination in step S250 again.

  If it is determined in step S60 that the time t is equal to or longer than the first set time T1, the timer 81 is reset (step S70), and the control device 80 shifts the blower 27 to the stopped state (step S80). .

  Next, control device 80 determines whether or not main transmission lever 52 is in neutral position P4 (step S285). If the main transmission lever 52 is in the neutral position P4, the control device 80 performs step S285 again. When the main transmission lever 52 is not in the neutral position P4, the control device 80 operates the blower 27 with a normal air volume (step S86), and performs step S210 again.

With this configuration, when the main transmission lever 52 is operated to the neutral position P4, the rotation speed of the blower 27 motor is set to a low rotation for the first set time T1, and the blower 27 is operated with a low air flow rate. Let
When the main speed change lever 52 is operated to a position other than the neutral position P4 during the first set time T1, the control device 80 determines that the operation has returned to work, and returns the air volume of the blower 27 to normal. Let Further, if the main transmission lever 52 is maintained in the neutral position P4 even after the first set time T1 has elapsed, the control device 80 shifts the blower 27 to the stop state.
Thereby, fertilizer application | work can be restarted rapidly in connection with returning to planting work after driving | running | working stop, aiming at the power saving of the blower 27 in the state which stopped feeding of the fertilizer. That is, the power consumption of the blower 27 can be reduced while the blower 27 is in an appropriate operating state in accordance with the situation at the time of running stop.
When the main transmission lever 52 is operated from the neutral position P4 to the low-speed forward position P2 or the movement position P5, the neutral position sensor switch 86 is turned off and the blower 27 is operated again.

[Fourth embodiment]
Further, when the main transmission lever 52 is operated to the neutral position P4, the blower 27 can be set to the normal air volume until the second set time T2 elapses from this operation.
Therefore, a control method of the blower 27 by determining whether or not the main transmission lever 52 has been operated to the neutral position P4 will be described with reference to FIGS. In addition, about the part which performs the same control as 3rd embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.

  The timer 81 measures the time t2 from the time when the blower 27 is in a working state with a low air flow, and when the time t2 is equal to or longer than the second set time T2, that is, the blower 27 is in a working state with a low air flow. When the second set time T2 has elapsed from the point in time, a signal is transmitted to the control device 80. The timer 81 is connected to a setter 81a for setting the set time of the second set time T2 in advance.

  When the main transmission lever 52 is operated to the neutral position P4 in step S210, measurement of the time t2 when the main transmission lever 52 is in the neutral position P4 is started (step S310), and the time t2 is equal to or greater than the second set time T2. It is determined whether or not (step S320). If it is determined in step S320 that the time t2 is shorter than the second set time T2, that is, the second set time T2 has not elapsed, the determination in step S320 is performed again. In step S320, when it is determined that the time t2 is equal to or longer than the second set time T2, that is, the second set time T2 has elapsed, step S20 is processed, and after step S20, the same control as in the third embodiment is performed. Is to do.

  The second set time T2 is a minute time compared to the first set time T1, and this second set time T2 is fed from the feed mechanism 26 to the fertilizer position by the wind sent from the blower 27. The longer the transport hose 28 is, the longer it is. That is, the second set time T2 is a time to reach the fertilizer position after the fertilizer is fed out, and when the second set time T2 has elapsed, the fertilizer does not remain in the transport hose 28, and the fertilizer is solidified. The possibility of clogging can be eliminated.

  By comprising in this way, when fertilizing work is interrupted, the fertilizer remaining in the conveyance hose 28 of the fertilizer application device 22 can be discharged.

[Fifth embodiment]
Further, when the travel speed sensor 87 determines that the travel is stopped, the blower 27 can be set to a normal air volume.
Therefore, a method for controlling the blower 27 by determining whether or not the vehicle is in a travel stop state will be described with reference to FIG. In addition, about the part which performs control same as 1st embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.
First, the control device 80 determines whether or not it is in a travel stop state based on the speed detected by the travel speed sensor 87 (step S410). Here, the case where the speed detected by the travel speed sensor 87 is 0 is defined as a travel stop state, and the other state is defined as a travel state.
When the control device 80 determines that the vehicle is in the traveling state, the control device 80 performs the determination in step S410 again.

  When determining that the vehicle is in the traveling stop state, the control device 80 determines whether or not the stop state is selected by the selection switch 77 (step S20). When the stop state is selected by the selection switch 77, the control device 80 stops the blower 27 (step S30).

  Next, the control device 80 determines whether or not it is in a travel stop state (step S435). When it is in the travel stop state, the control device 80 performs Step S435 again. When the vehicle is in the running state, the control device 80 operates the blower 27 with a normal air volume (step S36), and performs step S410 again.

  With this configuration, the control device 80 stops the blower 27 when the vehicle is in the travel stop state. Thereby, the power saving of the blower 27 can be achieved effectively, and noise can also be reduced.

In step S20, when the stop state is not selected by the selection switch 77, that is, when the operation state at the low air volume is selected by the selection switch 77, the time t during which the travel is stopped by the timer 81 is set. Is started (step S40), the rotation speed of the motor of the blower 27 is set to a low speed, and the air volume of the blower 27 is set to a low volume (step S45).
Next, the control device 80 determines whether or not it is in a travel stop state (step S450). If it is in the running state, it is determined that the planting operation has been restored, the blower 27 is returned to the normal air volume (step S55), and the determination in step S410 is performed again. If it is in the travel stop state, it is determined whether or not the time t is equal to or longer than the first set time T1 (step S60). If the time t is shorter than the first set time T1, the control device 80 again The determination in step S450 is performed.

  If it is determined in step S60 that the time t is equal to or longer than the first set time T1, the timer 81 is reset (step S70), and the control device 80 shifts the blower 27 to the stopped state (step S80). .

  Next, the control device 80 determines whether or not it is in a travel stop state (step S485). When it is in the travel stop state, the control device 80 performs Step S485 again. When the vehicle is in the running state, the control device 80 operates the blower 27 with a normal air volume (step S86), and performs step S410 again.

With this configuration, when the vehicle is in the travel stop state, the rotation speed of the motor of the blower 27 is set to a low rotation for the first set time T1, and the blower 27 is operated with a low air volume.
And when it will be in a driving | running | working state between 1st setting time T1, it will be judged that the control apparatus 80 returned to work, and it returns and operates the air volume of the blower 27 to normal. When the travel stop state is maintained even after the first set time T1 has elapsed, the control device 80 causes the blower 27 to transition to the stop state.
Thereby, fertilizer application | work can be restarted rapidly in connection with returning to planting work after driving | running | working stop, aiming at the power saving of the blower 27 in the state which stopped feeding of the fertilizer. That is, the power consumption of the blower 27 can be reduced while the blower 27 is in an appropriate operating state in accordance with the situation at the time of running stop.
And when it will be in a driving | running | working state, the blower 27 will be act | operated again.

[Sixth embodiment]
Moreover, when it becomes a driving | running | working stop state, until the 2nd setting time T2 passes from this time, the blower 27 can also be made into a normal air volume.
Therefore, a method for controlling the blower 27 by determining whether or not the vehicle is in a running state will be described with reference to FIGS. 15 and 16. In addition, about the part which performs the same control as 5th embodiment, the same code | symbol is attached | subjected to drawing and description is abbreviate | omitted.

  The timer 81 measures the time t2 from the time when the blower 27 is in a working state with a low air flow, and when the time t2 is equal to or longer than the second set time T2, that is, the blower 27 is in a working state with a low air flow. When the second set time T2 has elapsed from the point in time, a signal is transmitted to the control device 80. The timer 81 is connected to a setter 81a for setting the set time of the second set time T2 in advance.

  When the travel stop state is entered in step S410, measurement of the time t2 in the travel stop state is started (step S510), and it is determined whether or not the time t2 is equal to or longer than the second set time T2 (step S520). ). If it is determined in step S520 that the time t2 is shorter than the second set time T2, that is, the second set time T2 has not elapsed, the determination in step S520 is performed again. In step S520, when it is determined that the time t2 is equal to or longer than the second set time T2, that is, the second set time T2 has elapsed, step S20 is processed, and after step S20, the same control as in the third embodiment is performed. Is to do.

  The second set time T2 is a minute time compared to the first set time T1, and this second set time T2 is fed from the feed mechanism 26 to the fertilizer position by the wind sent from the blower 27. The longer the transport hose 28 is, the longer it is. That is, the second set time T2 is a time to reach the fertilizer position after the fertilizer is fed out, and when the second set time T2 has elapsed, the fertilizer does not remain in the transport hose 28, and the fertilizer is solidified. The possibility of clogging can be eliminated.

  By comprising in this way, when fertilizing work is interrupted, the fertilizer remaining in the conveyance hose 28 of the fertilizer application device 22 can be discharged.

As described above, in the rice transplanter 1 in which the planting unit 40 is connected to the traveling unit 10 so as to be movable up and down, the main transmission lever 52 that can be operated at a plurality of shift operation positions including the seedling joining position P3, and the main transmission lever 52 , A hopper 25 that contains fertilizer, a feeding mechanism 26 that is disposed below the hopper 25 and feeds the fertilizer by a predetermined amount, and transports the fed fertilizer to the fertilization position. And a selection switch for selecting the operating state of the blower 27 when the main transmission lever 52 is operated to the seedling position P3 to one of a stopped state and an operating state with a low air flow rate. 77, a traveling speed sensor 87 that detects whether or not the rice transplanter 1 is in a traveling state, and the operation of the blower 27 are controlled. When it is detected that the joint position P3 or the neutral position P4 has been operated, or when the travel speed sensor 87 detects that the travel stop state is detected, the blower 27 is stopped based on the selection by the selection switch 77 or And a control device 80 configured to operate in a low air volume.
By comprising in this way, it becomes possible to alternatively select a stop state or an operation state with a low air volume as the operation state of the blower 27 of the fertilizer application device 22 at the time of seedling joining work. Therefore, when the stop state is selected, power saving of the blower 27 can be effectively achieved. On the other hand, when the operation state with a low air volume is selected, the fertilizer application is promptly resumed after returning to the planting operation after the seedling joining operation while reducing the power consumption of the blower 27 in the state where the feeding of the fertilizer is stopped. It can be resumed. That is, power saving of the blower 27 can be achieved while the blower 27 is in an appropriate operating state according to the situation at the time of seedling joining work.

In addition, a timer 81 that measures an elapsed time t from the time when the main transmission lever 52 is operated to the seeding position P3 is provided, and the control device 80 is selected by the selection switch 77 to operate at a low air volume. In this case, the elapsed time t which is the measurement result of the timer 81 is compared with the first set time T1, and the first set time T1 which is set in advance from the time when the main transmission lever 52 is operated to the seedling joining position P3. When the time has elapsed, the blower 27 is changed from an operating state with a low air volume to a stopped state.
By configuring in this way, when the seedling joining operation does not end within a predetermined time, the blower 27 can be changed from the operating state with the low air volume to the stopped state. Therefore, the blower 27 is not operated wastefully, and power saving can be achieved.

Moreover, it has the raising / lowering position detection sensor 83 which detects the position of the planting part 40, and the control apparatus 80 is whether the position of the planting part 40 detected by the raising / lowering position detection sensor 83 rose more than setting height. If it is detected and detected, the blower 27 is put into an operating state with a low air volume.
With this configuration, when the fertilization operation is interrupted by raising the planting unit 40 in order to perform work other than the seedling-joining work, the fertilization work can be performed promptly after the work while reducing the power consumption of the blower 27. It can be resumed.

Moreover, the timer 81 which measures the elapsed time t2 from the time the main transmission lever 52 is operated to the seedling joining position P3 is provided, and the control device 80 includes the elapsed time t2 which is the measurement result of the timer 81 and the second set time. Compared with T2, the operation state of the blower 27 is not changed until the second set time T2 elapses from the time when the main transmission lever 52 is operated to the seeding position P3, and the second set time T2 or more. When the time has elapsed, the blower 27 is brought into a stopped state or an operating state with a low air flow based on the selection by the selection switch 77. Here, the second set time T2 is set shorter than the first set time T1.
By configuring in this way, even if the main transmission lever 52 is operated to the seedling joining position P3 and the feeding mechanism 26 of the fertilizer application 22 is stopped, the blower 27 is not stopped immediately, but the second set time T2 Until the time elapses, the fertilizer remaining in the transfer hose 28 from the feeding mechanism 26 to the fertilization position can be reliably discharged. Therefore, the possibility that the transport hose 28 is clogged by the remaining fertilizer can be eliminated.

DESCRIPTION OF SYMBOLS 1 Rice transplanter 10 Traveling part 22 Fertilizer 25 Hopper 26 Feeding mechanism 27 Blower 28 Carrying hose 40 Planting part 52 Main transmission lever 77 Selection switch 80 Control device 81 Timer 82 Lifting position detection sensor 85 Micro switch 87 Traveling speed sensor

Claims (4)

In the rice transplanter where the planting part is connected to the traveling part so that it can be raised and lowered,
An operation means for traveling speed change that can be operated at a plurality of speed change operation positions including the seedling position;
A shift operation position detecting means for detecting that the operating means for traveling shift is in a seedling position;
A hopper that stores fertilizer, a feeding means that is disposed at a lower portion of the hopper and feeds the fertilizer by a predetermined amount, and a fertilizer applying apparatus that feeds the fed fertilizer to a fertilization position;
A selection operation means for selecting an operation state of the air blowing means when the traveling speed change operation means is being operated at the seedling position as one of a stopped state or an operation state with a low air flow;
Traveling state detection means for detecting whether the rice transplanter is in a traveling state;
When the operation of the blowing means is controlled and the shift operation position detecting means detects that the travel shift operating means is operated to the seedling joining position or the neutral position, or the travel state detecting means is in a travel stop state. When it is detected that there is a control device, the rice transplanter comprises: a control device that puts the blowing unit into a stopped state or an operating state with a low air volume based on the selection by the selection unit. Timer means for measuring the elapsed time from the time when the operating means for traveling speed change is operated to the seedling position,
When the operation state at a low air volume is selected by the selection operation means, the control device, based on the measurement result of the timer means, from the time when the traveling speed change operation means is operated to the seedling position, 2. The rice transplanter according to claim 1, wherein when the preset first set time has elapsed, the air blowing unit is changed from an operating state with a low air volume to a stopped state. Elevated position detection means for detecting the position of the planting part,
The control device determines whether or not the position of the planting part detected by the elevating position detection means has risen above a set height, and when the position rises above a set height above the set height, the blower means The rice transplanter according to claim 1 or 2, characterized in that the operation state is set at a low air volume. Timer means for measuring the elapsed time from the time when the operating means for traveling speed change is operated to the seedling position,
Based on the measurement result of the timer means, the control device is configured to control the air blowing means from when the traveling speed change operating means is operated to the seedling joining position until a second preset time elapses. When the operating state is not changed and the second set time or more has elapsed, the air blowing unit is brought into a stopped state or an operating state with a low air volume based on the selection by the selecting unit.
The rice transplanter as described in any one of Claim 1 to 3 characterized by the above-mentioned.

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