JP2005295861A - Rice transplanter with fertilizer applicator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a rice transplanter with a fertilizer applicator formed to supply a liquid fertilizer stored in a fertilizer tank to a fertilizing nozzle set at the under part of a seedling planting device by feeding with a pump through a feeding pipe under pressure, wherein, by suppressing flowing-out of remaining fertilizer when fertilization is halted, next fertilization is made promptly performable without using a high-ability pump. <P>SOLUTION: A fertilizer-leakage prevention mechanism 30 preventing flowing-out of remaining fertilizer in feed pipes 21a, 21b is put in a fertilizer supplying route, which remaining fertilizer naturally flows down and flows out from fertilizer nozzles 20a, 20b when force feed using pumps 18a, 18b is halted. The fertilizer-leakage prevention mechanism 30 is formed so that a valve 33 openably put in the fertilizer supplying route is switched and held at a route closing position by negative pressure generated in the fertilizer supplying route by natural flow-down of the remaining fertilizer. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a rice transplanter with a fertilizer device configured to bury liquid fertilizer in a rice field simultaneously with planting.

As the rice transplanter with a fertilizer application, as disclosed in Patent Document 1, for example, pumps 23 and 33 driven by power branched from a planting transmission system for liquid fertilizer stored in fertilizer tanks 21 and 31 are disclosed. Is configured to be fed through the supply pipes 25 and 35 to the fertilization nozzles 22 and 32 for the side stripes and the deep layer provided at the lower part of the seedling planting device 10.
JP 2002-233216 A

  In the rice transplanter with fertilizer device of the above configuration, the pump is located above the rear part of the machine body, so the difference in height between the pump and the fertilizer nozzle is quite large, and after reaching the end of the planting run of one stroke Even if planting is stopped and the pump is stopped, the fertilizer remaining in the supply pipe that connects the pump and the fertilizer nozzle may flow down due to its own weight and flow out of the fertilizer nozzle. Fertilizer will be sown in the headland for conversion.

  However, in general, when the round-trip planting process is completed, the planting around the shoreline, that is, planting in the headland, is performed, so that the fertilizer that leaked during the previous aircraft direction change has been planted in the headland On top of that, normal fertilization is carried out, resulting in a site with excessive fertilizer.

  In addition, if the remaining fertilizer in the supply pipe flows out, it will take time for the fertilizer that has been pumped to reach the fertilizer nozzle even when the pump is started when planting the next stroke. Fertilization was delayed with respect to the planting operation, and a shortage of fertilizer was likely to occur in the first few strains of the planting strip.

  By the way, since liquid fertilizer is a paste with relatively high viscosity, if the inner diameter of the supply pipe or fertilizer nozzle is sufficiently small, it will be difficult to flow down spontaneously due to the viscosity and surface tension of the fertilizer, but the pipe resistance is high. Therefore, in order to secure the required amount of fertilizer per unit area in the field, it is necessary to use a pump with a particularly high capacity. However, pumps for fertilization need to be as many as the number of planting strips for side fertilization, and half the number of planting strips for deep fertilization, and considering the cost of these many pumps The fact is that it is necessary to use a somewhat thick supply pipe and fertilizer nozzle.

  The present invention has been made paying attention to such points, and the next fertilization is quickly performed by suppressing the outflow of residual fertilizer at the time of fertilization stop even without using a pump with a particularly high capacity. The main purpose is to be able to.

The first invention is a rice transplanter with a fertilizer device configured to pump liquid fertilizer stored in a fertilizer tank with a pump and supply the fertilizer nozzle provided at the bottom of the seedling planting device via a supply pipe.
A fertilizer leakage prevention mechanism for preventing residual fertilizer in the supply pipe from flowing down naturally and flowing out of the fertilizer nozzle when pumping by the pump is stopped is interposed in the fertilizer supply path. To do.

  According to the above configuration, when the planting travel of one stroke is finished and the end is reached, the planting is stopped and the pump is stopped to stop fertilization, the direction of the aircraft is changed and the next planting travel is started. In this case, the fertilizer leakage prevention mechanism functions as the pump stops, and the residual fertilizer in the supply pipe is prevented from flowing down naturally and flowing out of the fertilizer nozzle, and the residual in the supply pipe when the aircraft changes direction at the edge. The fertilizer will not flow down naturally and fall on the headland. Further, even during fertilization stoppage, the supply pipe is maintained in a state filled with fertilizer, and when the next pump is operated and the fertilizer pumping is resumed, the feed pipe is fed out from the fertilizer nozzle with little delay.

  Therefore, according to 1st invention, since the fertilizer leakage at the time of a fertilization stop is suppressed, while being able to prevent the site | part of excessive fertilizer generation | occurrence | production in the revolving planting along the edge, at the time of the planting start of the next process It is suppressed that fertilization is delayed, and the occurrence of a shortage of fertilizer in the vicinity of the top of the planting strip can be avoided.

According to a second invention, in the first invention,
The fertilizer leakage prevention mechanism is configured such that a valve element that is openable and closable in the fertilizer supply path is switched and held in the closed position by the negative pressure generated in the fertilizer supply path by the natural flow of the residual fertilizer. It is characterized by.

  According to the above configuration, when the pump is stopped and the fertilizer remaining in the fertilizer supply path starts to flow down naturally, negative pressure is generated at the top of the fertilizer supply path, and the valve body is closed by the negative pressure. Is adsorbed and retained. Although a slight amount of fertilizer outflow occurs before the valve body closes, the fertilizer outflow is prevented by the viscosity and surface tension of the fertilizer after the valve body is closed. Can be implemented with a simple structure.

According to a third invention, in the second invention,
The valve body is configured to be switched and held in an open position by a fertilizer supply pressure.

  According to the above configuration, after the pump is stopped and the valve body is switched and held at the closed position, when the pump is operated again and the fertilizer pumping is resumed, the valve body at the closed position is opened by the fertilizer supply pressure. And is held in the open position until the pump is then stopped.

  In addition, as a valve structure that closes when the pump is stopped and opens when the pump is activated, for example, a valve body that is urged to a closed position by a spring is configured to be slidable, and fertilizer pumped by the pump enters the valve inlet. When it is fed, the valve body is displaced to the open position against the spring, the fertilizer is sent out from the outlet, and when the fertilizer feed to the valve inlet is stopped, the valve body is switched to the closed position by the spring It is also possible to configure such that However, according to this, negative pressure acts on the valve outlet because the fertilizer remaining in the fertilizer supply path below the valve outlet naturally flows, and this negative pressure exerts a force in the opening direction of the valve body. Will receive. In other words, in this configuration, since the negative pressure generated by the fertilizer flow acts as a force for operating the valve body in the direction to open the valve body, the spring must be larger than this force, and the pump discharge pressure is increased accordingly. There is a need.

  On the other hand, in the third invention, the negative pressure generated by the fertilizer flow works as the force to operate the valve body in the closing direction, so there is no need to increase the pump discharge pressure and the pump has a low discharge pressure. I can do it.

According to a fourth invention, in the first invention,
Planting so that the fertilizer leakage prevention mechanism can be opened and closed in conjunction with the switching operation of the planting clutch, and the valve element that can be opened and closed in the fertilizer supply path is closed and operated in conjunction with the switching operation of the planting clutch. The clutch and the valve body are linked together.

  According to the above configuration, when the planting travel of one stroke is completed and the end is reached, the planting clutch is disengaged to stop planting and the fertilizer pump is stopped, but in conjunction with this, the fertilizer leakage prevention mechanism Since the valve body is closed, leakage due to the natural flow of residual fertilizer is suppressed simultaneously with the stop of the planting operation. In addition, after turning the aircraft at the shore, the planting clutch is put in and the planting of the next process is started, and at the same time the valve body of the fertilizer leakage prevention mechanism is opened. Fertilization is performed with little delay.

  Therefore, according to the fourth aspect of the present invention, it is possible to prevent unreasonable application of fertilizer to the headland when changing the direction of the aircraft, and to avoid the occurrence of excessive fertilizer when planting along the edge of the aircraft. Occurrence of fertilization delay in the initial stage of resuming planting after conversion can be prevented.

According to a fifth invention, in the first invention,
The seedling planting device elevating means and the valve body are linked so that the valve body provided with the fertilizer leakage prevention mechanism can be opened and closed in the fertilizer supply path is closed in conjunction with the raising operation of the seedling planting device. It is characterized by being.

  According to the above configuration, when the planting travel of one stroke is finished and it reaches the shore, the planting clutch is used to change the aircraft direction and the fertilizer pump is stopped to raise the seedling planting device. When the seedling planting device ascending operation is performed, the valve body of the fertilizer leakage prevention mechanism is closed, so that leakage due to the natural flow of residual fertilizer is suppressed simultaneously with the stop of the planting operation.

  Therefore, according to the fifth invention, it is possible to prevent unreasonable application of fertilizer to the headland when changing the direction of the aircraft, and it is possible to avoid the occurrence of an excessive fertilizer site when turning around along the heel.

A sixth invention is the above fourth or fifth invention, wherein
The valve body is configured to be switched by an actuator.

  According to the above configuration, an electromagnetic solenoid or an electric motor is used for the actuator, and the valve body is quickly detected at a desired timing by electrically detecting the switching operation of the planting clutch and the raising operation of the seedling planting device with the switches and various sensors. The fourth or fifth invention can be suitably implemented.

A seventh invention is the invention according to any one of the first to sixth inventions,
The pump is configured to be driven by an electric actuator, and a fertilizer switch for controlling the operation of the electric actuator is provided in the vicinity of the driver seat.

  According to the above configuration, when planting is started for the first time, or when planting is resumed after changing the direction of the aircraft at the shore, operating the fertilizer switch and starting the pump early before starting planting traveling The fertilizer supply route can be filled with fertilizer, and then the planting can be started without delay by starting planting.

  Therefore, according to the 7th invention, it becomes effective in preventing that the planting stock | stump | stock near the head of a planting strip runs out of fertilizer shortage.

  FIG. 1 shows an overall side view of a rice transplanter with a fertilizer applying apparatus according to the present invention, and FIG. 2 shows a plan view thereof. In this rice transplanter with a fertilizer application, a seedling planting device 4 configured for six-row planting is driven by a hydraulic cylinder 5 at the rear part of a four-wheel drive type traveling machine body 3 having a front wheel 1 and a rear wheel 2. It has a structure that is connected so as to be able to be driven up and down via a four-link mechanism 6. A driving part 8 that houses an engine 7 is disposed at the front part of the traveling machine body 3, and is located above the rear part of the machine body. A driver's seat 9 is installed, and a fertilizer application device 10 is provided behind the driver's seat 9. Further, on the left and right sides of the prime mover 8, there are standing seedling platforms 11, and fertilizer tanks 12 a and 12 b for storing liquid fertilizers below the respective reserve seedling platforms 11 and on the left side of the driver seat 9. Is installed.

  In the seedling planting device 4, six mat mat seedlings are placed side by side and a seedling bed 15 that reciprocally moves back and forth with a fixed stroke, and seedlings for each strain are cut out from the lower end of the seedling bed 15 and the surface of the seedling is planted. A rotary planting machine 16 to be planted on the T, three leveling floats 17 arranged in parallel on the left and right, etc. are provided so as to level the six planned planting locations by two.

  In addition, the fertilizer application device 10 is deep in the middle of each of the side row fertilizer in which the fertilizer is shallowly embedded in the side portion of the six planted seedlings, and the left two, the middle two and the right two. Fertilizer is buried so that deep fertilization is performed. Fertilizer for side fertilization is stored in the front left and right fertilizer tanks 12a, and fertilizer for deep layer fertilization is stored in the rear fertilizer tank 12b.

  Six pumps 18a for pumping the fertilizer for side fertilizer application are arranged in parallel at the right side of the rear of the driver seat 9, and the fertilizer for deep layer fertilizer is pumped to the right side of the rear of the driver seat 9 3 The pumps 18b are arranged in parallel, and the front left and right fertilizer tanks 12a and a group of side fertilizer pumps 18a are connected to each other by a supply pipe 19a, and the rear fertilizer tank 12b and the deep fertilizer pump 18b are connected. The group is connected in communication with a supply pipe 19b, and the fertilizer derived from the fertilizer tanks 12a and 12b is distributed and supplied to the pumps 18a and 18b.

  Further, each of the leveling floats 17 arranged in parallel is equipped with two fertilization nozzles 20a for side fertilization, and one fertilization nozzle 20b for deep fertilization is located in front of them. The pump 18a for side strip fertilization and the fertilizer nozzle 20a for side strip fertilization are connected to each other via a supply pipe 21a made of a resin tube, and each pump 18b for deep layer fertilization and for deep layer fertilization are used. The fertilizer application nozzle 20b is connected in communication via a supply pipe 21b made of a resin tube.

  FIG. 4 shows an outline of the transmission structure of this rice transplanter. As shown in the figure, the power of the engine 7 accommodated in the driving section 8 is transmitted to a hydraulic continuously variable transmission (HST) 23 as a main transmission capable of switching between forward and backward movement, and the transmission power supports the front wheel 1. And input to the mission case 24 deployed in the front of the aircraft. The shifting power input to the mission case 24 is branched into a traveling system and a planting work system, and the traveling system power is shifted to a plurality of stages by a gear-type auxiliary transmission mechanism 25 and then transmitted to the front wheels 1 and the rear wheels 2. Is done. On the other hand, the power of the branched planting work system is taken out to the rear of the machine body via the planting clutch 28 after only the forward rotation power is transmitted to the gear-type inter-strain transmission mechanism 27 via the one-way clutch 26. The shaft is transmitted to the seedling planting device 4.

  Then, after the power of the planting work system taken out from the transmission case 24 is transmitted to the two gear-type transmissions 29a and 29b to be shifted, it is transmitted to the pump 18a for side fertilization and the pump 18b for deep layer fertilization. The amount of fertilization per unit area is adjusted by changing the pump drive speed by shifting the transmissions 29a and 29b.

  Each fertilizer supply path from the pumps 18a and 18b to the fertilizer application nozzles 20a and 20b is provided with a fertilizer leakage prevention mechanism 30 that prevents the fertilizer remaining in the supply pipe from flowing down and flowing out when the pump is stopped. Some examples are shown below.

  [First example]

  As shown in FIGS. 5 and 6, the fertilizer leakage prevention mechanism 30 of this example includes a disc-like valve body 33 that is movably moved up and down in a chamber 32 formed in a casing 31, and a valve body on the bottom surface of the casing. An inlet 34 and an outlet 35 are formed opposite to each other. The inlet 34 and the pumps 18a and 18b are connected to each other through supply pipes 21a and 21b. The outlet 35 and the fertilizer nozzles 20a and 20b are connected to the supply pipes 21a and 21b. It has a structure of communication connection. In addition, the valve body 33 is provided with a through hole 36 that allows the fertilizer to flow when moving up and down.

  According to the fertilizer leakage prevention mechanism 30 having the above-described configuration, when the pumps 18a and 18b are operated and the fertilizer is supplied to the inlet 34, the valve body 33 is lifted by the supply pressure so that the outlet 35 is opened. It is sent out from the outlet 35 and supplied to the fertilizer application nozzles 20a, 20b.

  Then, when the pumps 18a and 18b are stopped, the inflow of fertilizer from the inlet 34 is eliminated, so that the valve element 33 is lowered by its own weight and closes the outlet 35. In this case, the fertilizer remaining in the supply pipes 21a and 21b on the lower side of the outlet 35 is caused to flow down by its own weight, and a negative pressure is generated at the outlet 35. The negative pressure causes the valve element 33 to be sucked downward to thereby discharge the outlet 35. Is kept closed. When the outlet 35 is closed in this way, the flow of fertilizer in the supply pipes 21a and 21b is suppressed by the viscosity and surface tension.

  In addition, the fertilizer leakage prevention mechanism 30 incorporates a mechanism for detecting when clogging occurs in the fertilizer application nozzles 20a and 20b and the supply pipe 21. That is, a magnet 38 is embedded in the valve body 33, and a reed switch 39 is mounted on the bottom of the casing 31 formed of a nonmagnetic material. The fertilizer nozzles 20a and 20b and the supply pipes 21a and 21b If clogging occurs, the fertilizer cannot flow even if the pumps 18a and 18b are operating, so that the valve body 33 is lowered and the reed switch 39 is detected. Therefore, when the reed switch 39 is sensing and operating in the pump operating state, it can be determined that clogging has occurred, and when the occurrence of clogging is detected, an alarm lamp or alarm buzzer is notified.

  [Second example]

  As shown in FIG. 7, the fertilizer leakage prevention mechanism 30 of this example is configured to open and close the fertilizer supply path by displacing the valve body 41 by an electromagnetic solenoid 42 and a return spring 43, and the electromagnetic solenoid 42 is planted. It is controlled in conjunction with the operation of the planting switch S1 for detecting whether the clutch 28 is turned on or off.

  That is, when the planting clutch 28 is inserted to drive the seedling planting device 4 and the pumps 18a and 18b are operated, the electromagnetic solenoid 42 is energized and the valve body 41 is switched to the open position, and fertilizer is applied from the pumps 18a and 18b. When the fertilizer of 20a, 20b is supplied to the nozzle and the planting clutch 28 is disengaged to stop the seedling planting device 4 and the pumps 18a, 18b, the energization to the electromagnetic solenoid 42 is cut off and the valve body 41 is The spring 43 is switched back to the closed position and the natural flow of fertilizer in the supply pipes 21a and 21b is suppressed.

  Therefore, when the planting clutch 28 is turned off in order to change the direction of the aircraft at the end of the planting run after one stroke, the fertilizer leakage prevention mechanism 30 operates in conjunction with this to suppress the natural outflow of fertilizer, Fertilizer is prevented from being applied to the headland during the aircraft turn.

  [Third example]

  As shown in FIG. 8, the fertilizer leakage prevention mechanism 30 of this example is also configured to open and close the fertilizer supply path by displacing the valve body 41 by an electromagnetic solenoid 42 and a return spring 43. The operation is controlled in conjunction with the operation of the control valve 44 of the cylinder 5 and the detection of the operation state of the planting clutch 28.

  In other words, during normal planting work, the control valve 44 is in an automatic lift control state that is activated based on information from the sensor S2 that detects the height of the center leveling float 17, and the vehicle body 3 floats and leans forward and backward. Regardless, the control valve 44 is automatically controlled so that the seedling planting device 4 is maintained at a set height with respect to the rice field. In this automatic elevation control state, the electromagnetic solenoid 42 of the fertilizer leakage prevention mechanism 30 is energized and the valve body 41 is switched to the open position, and the fertilizer is supplied from the pumps 18a and 18b to the fertilizer application nozzles 20a and 20b.

  When the raising switch Su is operated by the driver by the operating lever 46 disposed on the right side of the steering handle 45, the control valve 44 is switched to the raised position and the planting clutch 28 is automatically operated by the electric motor 47. The cutting operation is performed, and the driving of the seedling planting device 4 and the pumps 18a and 18b is stopped. Then, in conjunction with the operation of the raising switch Su, the electromagnetic solenoid 44 is de-energized, and the valve body 41 is switched back to the closed position by the spring 43, thereby suppressing the natural flow of fertilizer in the supply pipes 21a and 21b.

  Therefore, when the seedling planting device 4 is raised in order to change the direction of the aircraft at the end of the planting operation after one stroke, the fertilizer leakage prevention mechanism 30 operates in conjunction with this to suppress the natural outflow of fertilizer. Thus, fertilizer is prevented from being applied to the headland during the aircraft direction change.

  Further, when the lowering switch Sd is operated once via the operation lever 46 after the direction of the machine body is changed, the automatic raising / lowering control state is entered, and the seedling planting device 4 is lowered to the set work height. In this case, the planting clutch 28 is still in the disconnected state, and when the lowering switch Sd is operated again, the electric motor 47 is operated to operate the planting clutch 28, and the seedling planting device 4 and the pumps 18a and 18b are driven. At the same time, the electromagnetic solenoid 42 is energized and the valve body 41 is switched to the open position, and fertilizer is supplied from the pumps 18a and 18b to the fertilizer nozzles 20a and 20b.

  [Fourth example]

  As shown in FIG. 9, in this example, the pumps 18a and 18b are configured to be driven by a dedicated electric motor (electric actuator) 50, and the pumps 18a and 18b are connected to the fertilizer nozzles 20a and 20b. The fertilizer supply path is equipped with the fertilizer leakage prevention mechanism 30 shown in the first example. The electric motor 50 is started by the fertilizer application switch S3 and stopped by the operation of the raising switch. The fertilizer switch S3 is provided in a grip portion of the shift lever 51 provided on the left side of the steering handle 45 in order to operate the continuously variable transmission 23.

  According to this configuration, during the planting operation, as described in the first example, the valve element 33 of the fertilizer leakage prevention mechanism 30 is operated to the open position by the fertilizer supply pressure, and fertilization is performed simultaneously with planting. Then, when the seedling planting device 4 is raised by operating the raising switch Su in order to change the direction of the aircraft at the end of the planting after one planting, the electric motor 50 for fertilization is stopped in conjunction with this. At the same time, the fertilizer leakage prevention mechanism 30 operates as described above to suppress the natural outflow of the fertilizer, and the fertilizer is prevented from being applied to the headland during the direction change of the aircraft.

  Further, when the lowering switch Sd is operated once after the direction of the machine body is changed, the seedling planting device 4 is controlled to be lowered to the set working height while the planting clutch 28 is still maintained in the disengaged state. Then, when the lowering switch Sd is operated again, the planting clutch 28 is operated by the electric motor 47, and the driving of the seedling planting device 4 is resumed. By operating S3, the electric motor 50 is started and the pumps 18a and 18b are operated.

  That is, the function of the fertilizer leakage prevention mechanism 30 suppresses the outflow of residual fertilizer in the supply pipes 21a and 21b during the direction change of the aircraft, but some outflow may occur depending on the fertilizer conditions. In such a case, even if the pumps 18a and 18b are operated simultaneously with the start of planting, there is a time delay for the fertilizer to reach the fertilizer nozzles 20a and 20b, but this is preceded by using the fertilizer switch S3. It becomes possible to perform fertilization appropriately from the first strain of the planting strip.

  In this example, the case where an electric motor is used as an electric actuator for driving the fertilizer application pumps 18a and 18b is illustrated. However, the pump 18a and 18b may be driven by an electromagnetic vibrator.

Whole side view of rice transplanter with fertilizer application Overall plan view of rice transplanter with fertilizer application Top view of fertilizer application equipment Transmission system diagram Longitudinal sectional view showing the fertilizer leakage prevention mechanism of the first example Cross-sectional plan view of fertilizer leakage prevention mechanism Control block diagram showing the configuration of the fertilizer leakage prevention mechanism of the second example Control block diagram showing the configuration of the fertilizer leakage prevention mechanism of the third example Control block diagram showing the configuration of the fertilizer leakage prevention mechanism of the fourth example

Explanation of symbols

4 Seedling planting device 9 Driving seat 12a Fertilizer tank 12b Fertilizer tank 18a Pump 18b Pump 20a Fertilizer nozzle 20b Fertilizer nozzle 21a Supply pipe 21b Supply pipe 28 Planting clutch 30 Fertilizer leakage prevention mechanism 33 Valve body 41 Valve body 50 Electric actuator S3 Fertilizer switch

Claims (7)

In the rice transplanter with a fertilizer device configured to pump the liquid fertilizer stored in the fertilizer tank with a pump and supply it to the fertilizer nozzle provided at the bottom of the seedling planting device via the supply pipe,
A fertilizer leakage prevention mechanism for preventing residual fertilizer in the supply pipe from flowing down naturally and flowing out of the fertilizer nozzle when pumping by the pump is stopped is interposed in the fertilizer supply path. Rice transplanter with fertilizer application.   The fertilizer leakage prevention mechanism is configured such that a valve element that is openable and closable in the fertilizer supply path is switched and held in the closed position by the negative pressure generated in the fertilizer supply path by the natural flow of the residual fertilizer. The rice transplanter with a fertilizer applicator according to claim 1.   The rice transplanter with a fertilizer application device according to claim 2, wherein the valve body is configured to be switched and held at an open position by a fertilizer supply pressure.   Planting so that the fertilizer leakage prevention mechanism can be opened and closed in conjunction with the switching operation of the planting clutch, and the valve element that can be opened and closed in the fertilizer supply path is closed and operated in conjunction with the switching operation of the planting clutch. The rice transplanter with a fertilizer applicator according to claim 1, wherein the clutch and the valve body are linked.   The seedling planting device raising means and the valve body are linked so that the valve body having the fertilizer leakage prevention mechanism that can be opened and closed in the fertilizer supply path is closed in conjunction with the raising operation of the seedling planting device. The rice transplanter with a fertilizer application device according to claim 1, wherein the rice transplanter is provided.   The rice transplanter with a fertilizer application device according to claim 4 or 5, wherein the valve body is configured to be switched by an actuator.   The pump according to any one of claims 1 to 6, wherein the pump is configured to be driven by an electric actuator, and a fertilizer switch that controls the operation of the electric actuator is provided in the vicinity of the driver's seat. Rice transplanter with fertilizer application.

Images