JPH10276518A - Rice transplanter engine control device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To reduce the number of seedlings on a seedling mounting table, automatically run the engine to a seedling supply point, and then automatically lower the engine speed so that seedling supply work can be performed. SOLUTION: An engine control means 37 in which a seedling amount sensor 33 for detecting the seedling amount of a seedling mounting table and a clutch sensor 36 for detecting an operation state of a main clutch 41 are linked to an accelerator operation mechanism 38. is there. When the main clutch 41 is operated to be disengaged in a state where the seedlings on the seedling rest are reduced to the remaining amount for replenishment, the engine control means 37 operates the accelerator operating mechanism based on information from the clutch sensor 36 and the seedling quantity sensor 33. 38 is activated automatically.
Then, the accelerator operation mechanism 38 returns the operation arm 30a of the accelerator device 30 to the idling position A, and automatically lowers the engine speed from working to idling.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an engine control device for a rice transplanter.

[0002]

2. Description of the Related Art In a rice transplanting machine, when the amount of seedlings on a seedling mounting table is reduced and replenishing of seedlings is performed, the running of the machine is stopped. When lowered to the state, the engine sound is lowered and the operation can be performed advantageously, such as being quiet. For this reason,
Conventionally, when the amount of seedlings on the seedling mounting table becomes small, the engine speed is automatically lowered, and the labor for lowering the engine speed can be omitted and the seedlings can be supplied as easily as possible. In addition, in some cases, when the amount of seedlings on the seedling mounting table becomes small, the main clutch is automatically disengaged, so that the labor for stopping the running of the machine can be omitted and the seedlings can be replenished as easily as possible.

[0003]

When a seedling is planted inside a field away from a ridge, it may be necessary to replenish the seedlings. In this case, if it is the conventional rice transplanter described above,
The engine is automatically idled inside the field or the main clutch is automatically disengaged and the vehicle cannot run. For this reason, when it is necessary to replenish the seedlings from outside the machine by traveling to the ridge, the engine speed can be increased and operated regardless of the seedling outage information from the seedling quantity sensor.
Alternatively, it was necessary to switch the automatic control from the previous engagement to the off state so that the main clutch could be operated. An object of the present invention is to provide a rice transplanter that can supply a seedling as easily as possible even when it is not necessary to run the seedling supply from a location where a seedling has been cut to a ridge.

[0004]

The constitution, operation and effect of the invention according to claim 1 are as follows.

[Structure] A seedling amount sensor for detecting the amount of seedlings on the seedling table and a clutch sensor for detecting the operating state of the traveling clutch are provided. An engine control device for a rice transplanter, comprising: engine control means for automatically lowering the engine speed to a set speed based on information from the seedling amount sensor and the clutch sensor when the clutch is disengaged.

[Operation] The remaining amount of seedlings that require seedling supply is set as the set remaining amount, and the engine speed such as idling to be operated at the time of seedling supply is set as the set rotation speed. When the required amount of seedlings is reached, that is, when the seedlings run out, if the spare seedlings are piled up and it is not necessary to go to the ridges to supply the seedlings, disconnect the running clutch at the place where the seedlings have been cut off and operate. Stop the aircraft running. If it is necessary to replenish the seedlings up to the ridge, the vehicle should be driven to the ridge without stopping at the location where the seedlings have been cut off, and then the traveling clutch should be turned off to stop the machine running. Then, in any case, when the airframe running is stopped, the engine control means decreases the engine speed by operating the clutch for running and disengaging the seedling quantity sensor. The seedlings can be replenished while automatically lowering the engine speed from the working speed up to the set speed to a low speed such as idling.

[Effect] Regardless of whether the seedlings are replenished at the place where the seedlings are cut off, or when the seedlings are replenished by traveling from the place where the seedlings are cut off to the ridge, the engine can be stopped simply by stopping the running clutch and stopping the machine running. The number of rotations automatically decreases, and seedlings can be replenished easily and quietly without the need to decelerate the engine. In addition, even if it is necessary to travel from the location where the seedlings have occurred to the edge of the ridge because the engine speed does not decrease or the traveling clutch does not disconnect just by the occurrence of seedlings, automatic control will be turned off as in the past. You can run to the ridge smoothly without the trouble of switching, and you can easily and efficiently supply seedlings from this aspect.

The structure, operation and effect of the invention according to claim 2 are as follows.

[0010] In the configuration according to the first aspect of the present invention, an alarm device is provided for notifying that the amount of seedlings on the seedling mounting table has become less than the set remaining amount, and the amount of seedlings on the seedling mounting table is set to the setting value. When the remaining amount becomes equal to or less than the remaining amount, the alarm device is configured to be automatically operated based on information from the seedling amount sensor.

[Action] When a seedling is cut off, an alarm device is automatically activated to give an alarm, and it is possible to easily and surely recognize that seedling replenishment is required and to replenish the seedling without delay. Things.

[Effect] Even if the seedlings are cut off, the running can be continued without the trouble of switching the automatic control to the cut-off state. The seedlings can be replenished in a timely manner so that it is easy and reliable to recognize the seeds.

The structure, operation and effect of the invention according to claim 3 are as follows.

[0013] [Structure] In the structure of the invention according to claim 1 or 2, the engine control means is a control means which does not perform an automatic increase operation after an automatic reduction operation of the engine speed.

[Operation] After the engine speed is automatically lowered and the seedlings are replenished, the engine speed is not automatically increased by the engine control means but is increased to an arbitrary speed by manual operation. Adjust and resume work.

[Effect] After the seedling replenishment is performed, the engine speed is readjusted to an arbitrary value such as a rotation speed different from that before the seedling replenishment, the running speed is gradually increased, and the planted seedling is planted before the seedling replenishment. For example, it is possible to easily adjust the position, or readjust the running speed to a value different from that before the seedling replenishment, thereby making it easier to run.

The structure, operation and effect of the invention according to claim 4 are as follows.

[0017] [Structure] In the structure of the present invention according to claim 1 or 2, when the amount of seedlings on the seedling mounting table is larger than the set remaining amount and the traveling clutch is engaged, the engine control means is activated by the engine control means. Based on information from the quantity sensor and the clutch sensor, the engine speed is automatically increased at a slower adjustment speed than during the lowering operation.

[Operation] When the running clutch is operated after the seedling replenishment is completed, the amount of seedlings on the seedling mounting table is larger than the set remaining amount of seedlings, and the running clutch is turned on. With this, the engine control means automatically raises the engine speed that was previously lowered and operated at a slower adjustment speed than during the lowering operation, and resumes work while gradually increasing the engine speed to the original work etc. it can.

[Effect] When the seedling replenishment is completed, the running speed is gradually increased, and the running is started while the starting impact is unlikely to occur. The planted seedling is easily aligned with the planted seedling before the seedling replenishment. Or resume work while you work.
In addition, the engine speed is automatically gradually increased simply by engaging the traveling clutch, which is advantageous in terms of operation so that no special speed-up operation is required.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, an engine E which is driven by a pair of left and right drivable front wheels 1, 1 and rear wheels 2, 2 to transmit driving force to the front and rear wheels 1, 2. A driving unit having a driving seat 3 and the like on the front side and a riding type driving unit having a driving seat 3 and the like on the rear side are respectively lifted and lowered via a link mechanism 5 capable of swinging up and down by a lift cylinder 4. The seedling planting apparatus 10 is connected so as to be operated, and power is transmitted from the self-propelled body to the seedling planting apparatus 10 by the rotating shaft 6. Seedling planting equipment 1
And a fertilizer application device 20 for supplying fertilizer to the seedlings planted by the seedling planting mechanism 11 of the seedling planting device 10 and the like. It comprises a riding type rice transplanter with a fertilizer application device.

The seedling planting apparatus 10 comprises a planting machine 12 composed of a planting transmission case or the like for transmitting the rotating power from the rotating shaft 6 to a seedling planting mechanism 11 and the like, and the planting machine 12 at the rear of the planting machine 12. A plurality of seedling planting mechanisms 11 mounted in a laterally parallel manner so as to be rotatable and rotatable; a seedling mounting table 13 movably mounted in the lateral direction of the planting machine 12 above a front end side of the planting machine 12; It comprises a plurality of leveling floats 14 attached to the lower part of the body 12 side by side in the lateral direction. The seedling mounting table 13 is formed so that a plurality of mat-shaped seedlings to be individually supplied to the plurality of seedling planting mechanisms 11 are placed side by side in the lateral direction of the machine body. The seedlings are supplied to each seedling planting mechanism 11 while being reciprocated in the lateral direction of the machine in conjunction therewith. Each seedling planting mechanism 11 includes a pair of seedling planting claws 1.
1a, 11a and a pair of claw 11 with seedlings.
The blocks a and 11a are alternately cut and taken out of the mat seedlings placed on the seedling placing stand 13 and taken out of the seedlings, and the seedlings are transported down the field mud and planted. Each leveling float 14 moves on the surface of the field mud for the towing of the seedling planting apparatus 10 by the self-propelled vehicle, and levels the planned seedling planting site by the corresponding seedling planting mechanism 11. It is composed. Thereby, the seedling planting apparatus 1 is moved by the lowering operation of the link mechanism 5.
When the leveling float 14 is lowered to a work level at which the leveling float 14 is in contact with the mud surface of the field and the self-propelled machine is traveling, the seedling planting apparatus 10 levels the field mud by the leveling float 14 and removes the mud to the mud. A plurality of seedlings are planted, and seedlings are alternately planted on each planting line by a pair of seedling planting claws 11a, 11a.

The fertilizer application device 20 includes the fertilizer tank 21 configured to store the granular fertilizer, a fertilizer feeding device 22 connected to a lower portion of the fertilizer tank 21, and a fertilizer hose 23 attached to the fertilizer feeding device 22. And a groove forming device 24 attached to any of the leveling floats 14 so as to be located near the lateral side of any one of the plurality of seedling planting mechanisms 11. It is provided corresponding to the attachment mechanism 11. Fertilizer feeding device 22
Is provided with a fertilizer delivery roll 22a as shown in FIG.
The fertilizer feeding roll 22 a is configured to feed the granular fertilizer from the fertilizer tank 21 by a set amount, and to drop and supply the fertilizer to the groove generator 24 via the fertilizing hose 23. The ditch generator 24 creates a ditch in the field mud near the side of the seedling planting mechanism 11, and the fertilizer feeding device 22
It is configured to supply fertilizer from Japan. Thereby, the fertilizer applicator 20 feeds out a set amount of powdered fertilizer from the fertilizer tank 21 by the set amount in conjunction with the seedling planting movement of the seedling planting mechanism 11 as the seedling planting apparatus 10 performs the seedling planting operation. The grain fertilizer is buried in the mud of the field near the side of the seedling planted by the seedling planting mechanism 11.

As shown in FIG. 2, the operation arm 30a of the accelerator device 30 provided in the engine E is connected by an operation cable 31 to an accelerator lever 32a of an accelerator operation device 32 located in the operating section of the self-propelled body. . The accelerator operating device 32 supports the accelerator lever 32a so as to be rotatable around the axis X, and holds the accelerator lever 32a at an arbitrary operating position.
b, and the accelerator device 30 is adjusted to a desired speed state by swinging the accelerator lever 32a around the axis X, and the accelerator is set to the adjusted speed state. That is, the accelerator lever 32a is moved against the axis X against the friction of the friction mechanism 32b.
When the operation cable 31 is swung around and the operation cable 31 is operated to the pulling side, the operation cable 31 swings the operation arm 30a to the high speed side by the tension of the operation cable 31. Conversely, when the operation cable 31 is operated to the loosened side, the operation cable 31 is operated by the self-restoring force provided to return the operation arm 30a to the idling position.
0a is rocked to the deceleration side or the idling position. Then, the friction mechanism 32b applies frictional resistance to the accelerator lever 32a, thereby holding the operation arm 30a at a position operated by the accelerator lever 32a against self-restoring force. The engine 30 is adjusted to an arbitrary speed state and set to adjust the engine E to a rotation speed for work or the like, and the accelerator can be set.

As shown in FIG. 1, the seedling mounting table 13 is provided with a plurality of seedling quantity sensors 33, the fertilizer tank 21 of each fertilizer 20 has a fertilizer remaining amount sensor 34,
2, a main clutch sensor 36 is provided on the self-propelled body, and as shown in FIG. 2, an engine control means 37 associated with each of the sensors 33 to 36 is provided with an accelerator operation mechanism 38 and an alarm. It is associated with the device 39.

As shown in FIG. 3, a plurality of seedling amount sensors 33 are provided so that a plurality of mat-like seedlings to be individually supplied to a plurality of seedling planting mechanisms 11 are individually mounted. Are provided in such a manner that one seedling amount sensor 33 is located in one of the plurality of seedling placing portions 13a of the plurality of seedling placing portions 13a. Each seedling quantity sensor 33 is constituted by a swingable sensor main body 33a attached to the lateral side wall of the seedling mounting portion 13a, and a detection switch 33b interlocked with the sensor main body 33a. The sensor main body 33a is a contact type which acts on the side surface of the floor soil portion of the mat-shaped seedling placed on the seedling placing portion 13a.
The amount of mat-shaped seedlings placed on the
If the remaining amount is larger than the set remaining amount determined by the location of “a”, the sensor main body 33a swings inward of the side wall portion for the seedling, and the detection switch 33b is turned off. When the seedling amount of the mat-shaped seedling placed on the seedling placing portion 13a becomes equal to or less than the set seedling remaining amount, the pressing action of the seedling on the sensor body 33a is released, and the sensor body 33a is released.
Swings to the outside of the side wall portion due to the self-restoring force, and operates the detection switch 33b. Thus, in each seedling mounting portion 13a of the seedling mounting base 13, the seedling amount sensor 33 determines whether or not the seedling amount has become equal to or less than the set remaining amount.
The detection result is output to the engine control means 37 as an electric signal by the detection switch 33b.

As shown in FIG. 4, each fertilizer remaining amount sensor 3
Reference numeral 4 denotes a pressure-sensitive switch that acts on the particulate fertilizer stored in the fertilizer tank 21, and determines whether or not the amount of the particulate fertilizer stored in the fertilizer tank 21 becomes equal to or less than a set remaining amount determined by the arrangement level of the sensor 34. It is configured to detect and output this detection result to the engine control means 37 as an electric signal.

As shown in FIG. 4, each fertilizer clogging sensor 35 is constituted by an electric sensor having a pair of terminals 35a, 35a whose one ends are exposed to the fertilizer falling path inside the groove generator 24. When the fertilizer adheres to both terminals 35a, 35a, the electric resistance value changes. By knowing the value of the electric resistance value, it is possible to detect whether or not the fertilizer is clogged in the groove generator 24.
Thereby, the fertilizer clogging sensor 35 detects whether or not the fertilizer clogging has occurred in the groove generator 24, and outputs the detection result to the engine control means 37 as an electric signal.

As shown in FIG. 2, the main clutch sensor 3
Reference numeral 6 denotes a detection switch acting on a main clutch pedal 40 which is swingably supported by a transmission case forming a self-propelled body. The main clutch pedal 40 drives the front and rear wheels 1 and 2 and the seedling planting device 10 by turning on and off the transmission from the engine E to a traveling mission (not shown) and a planting mission (not shown). The main clutch 41 provided inside the transmission case is turned on and off so as to stop the operation. When the main clutch pedal 40 is depressed to the clutch disengaged position, the main clutch pedal 40
When the main clutch pedal 40 is returned to the clutch engaged position, the switch operating section of the clutch pedal 40 releases the pressing operation on the detection switch when the switch operating section which is a part of And the detection switch is turned off. Thus, the main clutch sensor 36 detects whether the main clutch 41 has been disengaged based on the operation position of the main clutch pedal 40 and outputs the detection result to the engine control means 37 as an electric signal.

The accelerator operating mechanism 38 is formed by an electromagnetic solenoid having an accelerator operating shaft 38a. When the accelerator operating mechanism 38 is being operated, the accelerator operating shaft 38a is operated in a direction of retreating to the solenoid body and the operating arm 30a is operated. The swing operation can be performed to a higher speed side than the idling position A. When the operation arm 30a is operated while the operation arm 30a is operated at a speed higher than the idling position A, the accelerator operation shaft 38a is operated in a direction protruding from the solenoid body to press the operation arm 30a. Thus, the operation arm 30a is returned to the idling position A and operated. Operation arm 3
When the operation lever 0a is returned to the idling position A, the accelerator lever 32a set on the high speed side is pulled back via the operation cable 31 against the friction mechanism 32b, and the accelerator lever 32a is also returned to the idling position. . Thus, when the engine E is driven at a higher rotational speed than idling, the accelerator operating mechanism 3
When the switch 8 is turned on, the accelerator operation mechanism 38 lowers the rotation speed of the engine E to the rotation speed of idling.

The alarm device 39 is disposed on the operation panel of the operation unit of the self-propelled body and has a seedling out alarm unit 39a.
It has a fertilizer out alarm section 39b and a clogging alarm section 39c. The out-of-seedling warning unit 39a is for illuminating that at least one seedling volume of the plurality of seedling mounting units 13a of the seedling mounting table 13 has become equal to or less than the set remaining amount. The out-of-fertilizer alarm section 39b includes a plurality of fertilizer tanks 21.
Is turned on to notify that at least one fertilizer has become equal to or less than the set remaining amount. Clogging alarm part 3
Numeral 9c indicates that a fertilizer clogging has occurred in at least one of the plurality of groove generators 24 by lighting.

The engine control means 37 is constituted by a microcomputer, and each of the sensors 33, 34, 35, 36
The accelerator operation mechanism 38 and the alarm device 39 are configured to be automatically operated based on the information from the control unit and the control flow shown in FIG. That is, in step # 1, it is determined whether the detection switch 33b of each seedling quantity sensor 33 is on or off, and all the seedling quantity sensors 33
If it is determined that the detection switch 33 is turned off, the process proceeds to step # 2, and if it is determined that at least one of the plurality of seedling amount sensors 33 is turned on, the process proceeds to step # 3. In step # 2, a signal to stop the seedling out alarm section 39a is output to the drive circuit 39d of the alarm device 39, whereby the seedling outing alarm section 3 is output.
9a is stopped, and the routine proceeds to step # 4. In this step # 4, it is determined whether or not each fertilizer remaining amount sensor 34 is turned on or off, and if it is determined that all the fertilizer remaining amount sensors 34 are turned off, the process proceeds to step # 5. If it is determined that at least one of the remaining fertilizer remaining sensors 34 is turned on, the process proceeds to step # 6. Step # 5
Then, a signal to stop the out-of-fertilizer alarm section 39b is output to the drive circuit 39d, whereby the out-of-fertilizer alarm section 3 is output.
9b is stopped, and the routine proceeds to step # 7. In this step # 7, it is determined whether each of the fertilizer clogging sensors 35 is turned on or off, and if it is determined that all the fertilizer clogging sensors 35 are off, the process proceeds to step # 8, where a plurality of fertilizers are turned off. If it is determined that at least one of the clogging sensors 35 is on, the process proceeds to step # 9. In step # 8, the drive circuit 39d includes a fertilizer clogging alarm section 39c.
By outputting a signal to stop the operation, the fertilizer clogging alarm unit 39c is stopped, and the process proceeds to step # 1. In step # 3, the driving circuit 39d supplies the seedling out alarm section 39a.
By outputting a signal to activate the operation, the seedling out warning section 39a is operated, and the process proceeds to step # 10. In step # 6, the drive circuit 39d includes a fertilizer out alarm section 39b.
By outputting a signal to activate the operation, the out-of-fertilizer alarm section 39b is operated, and the process proceeds to step # 10. In step # 9, the drive circuit 39d includes the fertilizer clogging alarm unit 3
By outputting a signal to operate 9c, the clogging alarm section 39c is operated to move to step # 10. In step # 10, it is determined whether the clutch sensor 36 is engaged or disengaged. Only when it is determined that the clutch sensor 36 is engaged, the process proceeds to step # 11. This step #
In 11, the accelerator operation mechanism 38 is operated by outputting a signal for operating the accelerator operation mechanism 38 to the drive circuit 38b of the accelerator operation mechanism 38.

Thus, the engine control means 37 determines that the amount of at least one seedling in the plurality of seedling placing portions 13a of the seedling placing stand 13 has become equal to or less than the set remaining amount which is set as the need for replenishing seedlings. The warning section 3 of the warning device 30
9a, when the amount of fertilizer in at least one of the fertilizer tanks 21 of the plurality of fertilizer applicators 20 becomes equal to or less than the set remaining amount that is set as a necessity for replenishing the fertilizer, the alarm unit 30 of the alarm device 30 is turned off. When the fertilizer clogging occurs in at least one of the groove generators 24 of the plurality of fertilizer application devices 20, the fertilizer clogging alarm portions 39c of the alarm device 30 are automatically activated. Then, the seedling outage condition in which the seedling amount of at least one seedling placing portion 13a of the seedling placing stand 13 has become equal to or less than the set remaining amount, and the amount of fertilizer in the fertilizer tank 21 of at least one fertilizing device 20 is equal to or less than the set remaining amount. If at least one of the fertilizer run-out situation and the fertilizer clogging situation in which the fertilizer is clogged in the groove generator 24 of at least one fertilizer application device 20 occurs and the main clutch 41 is operated to be turned off, The engine control means 37 sets the number of revolutions of the engine E based on the information from the seedling amount sensor 33, the fertilizer clogging sensor 35, and the clutch sensor 36 as the number of revolutions for idling and replenishment work or for clog clearance work. To lower automatically. Further, the engine control means 37 performs an automatic lowering operation of the engine speed, but does not perform an automatic raising operation thereafter.

The changeover switch 42 shown in FIG. 2 outputs a signal for causing the engine control means 37 to perform an automatic control or a signal for stopping the automatic control. That is, the engine control means 37 switches the accelerator and the alarm control for automatically operating the accelerator operation mechanism 38 and the alarm device 39 based on the information from the sensors 33, 34, 35 and 36 between ON and OFF. is there.

That is, during operation, the accelerator operating device 3
By adjusting and setting the accelerator device 30 to the working speed state by 2, the accelerator is set to a state in which the engine E is driven at the working speed. Then, the alarm control and the accelerator control of the engine control means 37 are turned on by the changeover switch 42. Then, when the number of seedlings in at least one of the plurality of seedling mounting portions 13a of the seedling mounting base 13 decreases to the set remaining amount or less, the alarm control based on the information from the seedling amount sensor 33 of the engine control means 37 is performed. For this reason, the seedling out alarm section 39a of the alarm device 39 is automatically activated, and it can be recognized that the seedling mounting table 13 needs to be replenished with seedlings. Further, when the amount of fertilizer in the fertilizer tank 21 in at least one of the plurality of fertilizer applicators 20 decreases to the set remaining amount or less, the alarm control based on the information from the fertilizer remaining amount sensor 34 of the engine control means 37 is performed. Warning device 39b of alarm device 39
Automatically activates to recognize when fertilizer supply is required. When the fertilizer clogging occurs in the groove generator 24 in at least one of the plurality of fertilizer application devices 20, the alarm device 39 uses the fertilizer clogging for the alarm control based on the information from the fertilizer clogging sensor 35 of the engine control means 37. The alarm unit 39c is automatically activated, so that it can be recognized that the clogged fertilizer needs to be removed. And out of seedlings, out of fertilizer,
The main clutch 4
1 to stop the machine running, the seedling amount sensor 33 of the engine control means 37, the fertilizer remaining amount sensor 3
4. Fertilizer clogging sensor 35 and clutch sensor 3
6 for the accelerator lowering control based on the information from the engine 6, the engine E's rotation speed automatically drops from the previous work speed to the idling speed, and the seedlings and fertilizer are gently removed without the need to decelerate the engine. It can supply and clean clogged fertilizers. After performing the replenishment operation and the cleaning operation, the accelerator lever 32a of the accelerator operation device 30 is operated from the idling position to the high-speed side, the engine E is accelerated, and the accelerator is set to a desired rotational speed.

During non-working time such as traveling, the changeover switch 42 switches off the alarm control and the accelerator control of the engine control means 37. Then, seedling rest 13
Even if the seedling amount sensor 33 is turned on to prevent seedlings from being placed on the fertilizer tank 21 and the fertilizer remaining amount sensor 34 is turned on to not feed fertilizer into the fertilizer tank 21, the seedling out alarm section 39 a of the alarm device 39 and the fertilizer Even when the main clutch 41 is turned off, the vehicle can travel while the rotation speed of the engine E does not decrease while the disconnection alarm section 39b is not operated.

[Another Embodiment] FIG. 6 shows an engine control device provided with another embodiment. That is, the accelerator device 30 of the engine E is provided with a screw mechanism (not shown) for connecting to the operation arm 30a thereof, and an electric motor for rotating the screw mechanism in the forward rotation direction or the reverse rotation direction. 50, the accelerator operation mechanism 50
Control means 51 linked with the drive circuit 50a
In addition, a lever sensor 52 for detecting the operation position of the accelerator lever 32a of the accelerator operation device 32 and an arm sensor 53 for detecting the operation position of the operation arm 30a of the accelerator device 30 are linked. The lever sensor 52 is constituted by a rotation potentiometer in which a rotation operation unit is linked to a rotation support shaft of the accelerator lever 32a, and is rotated by a swing operation force of the accelerator lever 32a. It is configured to detect whether the operation position has been operated and to output the detection result to the engine control means 51 as an electric signal. The arm sensor 53 is a rotary potentiometer in which a rotation operation unit is linked to a rotation support shaft of the operation arm 30a. The arm sensor 53 is rotated by the rotation power of the operation arm 30a, and the operation arm 30a is operated to any operation position such as the idling position A. In addition, the detection result is output to the engine control means 51 as an electric signal. When the accelerator lever 32a is operated, the engine control means 51 outputs a predetermined signal to the drive circuit 50a based on information from the lever sensor 52, and outputs a predetermined signal to the accelerator operation mechanism 50.
Is operated, and by detecting the operation position of the operation arm 30a based on information from the arm sensor 53, the operation arm 30a is moved in the direction corresponding to the direction in which the accelerator lever 30a is operated. The lever 30a is configured to perform a swing operation by a stroke proportional to the operated stroke. Also,
When the swing operation of the accelerator lever 30a is stopped, the engine control means 51 measures an elapsed time from the stop, and when the measured time reaches a set time, the operation position of the operation arm 30a at that time is set to an accelerator set. The stored position is stored in the accelerator storage unit 51a. When the accelerator lever 30a is operated after performing the storage process, when the set time has elapsed since the next time the accelerator lever 30a is stopped, the operation position at this time is set as a new accelerator set position first. It is stored in place of the stored one.

That is, during operation, the accelerator lever 32
The rotation of the lever sensor 52 is performed by the swinging operation of the a.
By operating the accelerator device 30 by operating 0,
The speed of the engine E is adjusted so as to rotate at a desired rotational speed for work or the like, and the accelerator is set to the rotational speed. Then, the engine control means 51 stores the accelerator-set rotation speed in the accelerator storage section 51a.

A seedling amount sensor 33 and a fertilizer remaining amount sensor 3 similar to the sensors 33, 34, 35, 36 and the alarm device 39 provided in the engine control device 37 shown in FIG.
4, fertilizer clogging sensor 35, clutch sensor 36,
The alarm device 39 is linked to the engine control means 51, and the engine control means 51
The accelerator operation mechanism 50 and the alarm device 39 are configured to be automatically operated based on the information from 4, 35 and 36 and the control flow shown in FIG. That is, in step # 101, it is determined whether the detection switch 33b of each seedling quantity sensor 33 is turned on or off, and if it is determined that the detection switches 33b of all seedling quantity sensors 33 are turned off, step # 102, at least one detection switch 33b of the plurality of seedling quantity sensors 33
If it is determined that is entered, the process proceeds to step # 103. In step # 102, the driving circuit 3 of the alarm device 39
By outputting a signal for stopping the out-of-seedling warning section 39a to 9d, the operation of stopping the out-of-seedling warning section 39a is operated, and the routine proceeds to step # 104. In this step # 104, it is determined whether each fertilizer remaining amount sensor 34 is turned on or off, and if it is determined that all the fertilizer remaining amount sensors 34 are off, the process proceeds to step # 105, If it is determined that at least one of the remaining fertilizer remaining sensors 34 is turned on, the process proceeds to step # 106. Step # 105
Then, a signal to stop the out-of-fertilizer alarm section 39b is output to the drive circuit 39d, whereby the out-of-fertilizer alarm section 3 is output.
9b is stopped, and the routine goes to Step # 107. In this step # 107, it is determined whether each of the fertilizer clogging sensors 35 is turned on or off, and if it is determined that all the fertilizer clogging sensors 35 are turned off, step # 10 is performed.
Then, if it is determined that at least one of the plurality of fertilizer clogging sensors 35 is on, the process proceeds to step # 10.
Move to 9. In step # 108, a signal to stop the fertilizer clogging alarm section 39c is output to the drive circuit 39d to stop the fertilizer clogging alarm section 39c, and the process proceeds to step # 110. In this step # 110, it is determined whether the clutch sensor 36 is off or on, and only when it is determined that it is on, the process proceeds to step # 111. In step # 103, a signal to activate the seedling out alarm section 39a is output to the drive circuit 39d to operate the seedling out alarm section 39a.
Move to 2. In step # 106, a signal for operating the out-of-fertilizer alarm section 39b is output to the drive circuit 39d to operate the out-of-fertilizer alarm section 39b, and the process proceeds to step # 112. In step # 109, the driving circuit 3
By outputting a signal to activate the fertilizer clogging alarm section 39c to 9d, the fertilizer clogging alarm section 39c is operated and the routine proceeds to step # 112. This step # 112
Then, it is determined whether the clutch sensor 36 is engaged or disengaged, and only when it is determined that the clutch sensor 36 is engaged, the process proceeds to step # 113. In this step # 113, the accelerator operation mechanism 50 is supplied to the drive circuit 50a of the accelerator operation mechanism 50.
The accelerator operation mechanism 50 is decelerated by outputting a signal to cause the accelerator operation mechanism to be decelerated. At this time, the accelerator operation mechanism 50 is decelerated until the accelerator device 30 enters the idling state. In step # 111, the accelerator operation mechanism 50 is accelerated by outputting a signal for operating the accelerator operation mechanism 50 to the speed increasing side to the drive circuit 50a of the accelerator operation mechanism 50.
At this time, the accelerator operation mechanism 50 is accelerated until the accelerator device 30 returns to the original speed state stored in the accelerator storage unit 51a, and the accelerator operation mechanism 50 is slower than when the accelerator operation mechanism 50 is operated in step # 113. The operation speed of the accelerator operation mechanism 50 is adjusted to a lower speed side so as to operate at a higher speed.

Thus, the engine control means 51 determines that the amount of at least one seedling in the plurality of seedling mounting portions 13a of the seedling mounting table 13 has fallen below the set remaining amount that is set to require seedling replenishment. The warning section 3 of the warning device 30
9a, when the amount of fertilizer in at least one of the fertilizer tanks 21 of the plurality of fertilizer applicators 20 becomes equal to or less than the set remaining amount that is set as a necessity for replenishing the fertilizer, the alarm unit 30 of the alarm device 30 is turned off. When the fertilizer clogging occurs in at least one of the groove generators 24 of the plurality of fertilizer applicators 20, the clogging alarm 39c of the alarm device 30 is automatically activated. Then, the seedling outage condition in which the seedling amount of at least one seedling placing portion 13a of the seedling placing stand 13 has become equal to or less than the set remaining amount, and the amount of fertilizer in the fertilizer tank 21 of at least one fertilizing device 20 is equal to or less than the set remaining amount. If at least one of the fertilizer running out condition and the fertilizer clogging condition in which the fertilizer is clogged in the groove generator 24 of at least one fertilizing device 20 occurs and the main clutch 41 is operated to be turned off, The engine control means 51 sets the number of rotations of the engine E based on the information from the seedling amount sensor 33, the fertilizer clogging sensor 35 and the clutch sensor 36 as the number of rotations of the idling engine for the replenishment operation or the clog clearance operation. To lower automatically.

When the seedlings have run out, the seedlings are replenished to the seedling mounting portion 13a, and the amount of seedlings in all the seedling mounting portions 13a of the seedling mounting base 13 increases beyond the set remaining amount, and the fertilizer runs out. In this case, the fertilizer tank 21 is replenished with fertilizer, and the fertilizer in all the fertilizer tanks 21 increases beyond the set remaining amount. In the case where the fertilizer is clogged, when the clogging of the groove generator 24 is cleared, When the clutch 41 is turned on, the engine control means 51 reduces the number of revolutions of the engine E based on the information from the seedling amount sensor 33, the fertilizer amount sensor 34, the fertilizer clogging sensor 35, and the clutch sensor 36 as compared with the previous lowering operation. The operation speed is automatically increased to the original working speed at a slow adjustment speed.

The changeover switch 42 shown in FIG. 6 outputs a signal for causing the engine control unit 51 to perform automatic control or a signal for stopping the automatic control. That is, the engine control means 51 switches the accelerator and the alarm control for automatically operating the accelerator operation mechanism 50 and the alarm device 39 based on the information from the sensors 33, 34, 35 and 36 between ON and OFF. is there.

That is, during operation, the accelerator operation device 3
By operating the accelerator operating device 50 via the engine control means 51 by the user 2 to adjust and set the accelerator device 30 to the working speed state, the engine E
Is set to a state in which is driven at the working speed.
The changeover switch 42 controls the engine control means 5.
The alarm control and the accelerator control of No. 1 are turned on. Then, when the number of seedlings in at least one of the plurality of seedling mounting portions 13a of the seedling mounting base 13 decreases to the set remaining amount or less, the alarm control based on the information from the seedling amount sensor 33 of the engine control means 51 is performed. For this reason, the seedling out alarm section 39a of the alarm device 39 is automatically activated, and it can be recognized that the seedling mounting table 13 needs to be replenished with seedlings. When the amount of fertilizer in the fertilizer tank 21 in at least one of the plurality of fertilizer applicators 20 has decreased to or below the set remaining amount, alarm control based on information from the remaining amount of fertilizer sensor 34 of the engine control means 51 is performed. Warning device 39 of alarm device 39
b operates automatically, and it can be recognized that fertilizer supply is required. When the fertilizer clogging occurs in the groove generator 24 in at least one of the plurality of fertilizer application devices 20, the alarm device 39 controls the fertilizer clogging for alarm control based on information from the fertilizer clogging sensor 35 of the engine control means 51. The alarm unit 39c is automatically activated, so that it can be recognized that the clogged fertilizer needs to be removed. In any of the cases of running out of seedlings, running out of fertilizer, and clogging of fertilizer, if the main clutch 41 is disengaged to stop the machine running, the seedling amount sensor 33, the fertilizer remaining amount sensor 34 of the engine control means 51, For the accelerator lowering control based on the information from the fertilizer clogging sensor 35 and the clutch sensor 36, the rotation speed of the engine E is automatically reduced from the previous rotation speed to the rotation speed of idling, and it takes time to decelerate the engine. It can quietly replenish seedlings and fertilizers, and clean clogged fertilizers. After performing the replenishing operation or the cleaning operation, when the main clutch 41 is turned on, based on information from the seedling amount sensor 33, the fertilizer remaining amount sensor 34, the fertilizer clogging sensor 35, and the clutch sensor 36 of the engine control means 51, For the accelerator elevation control, the rotational speed of the engine E is gradually increased to the original operating rotational speed to be restored and the accelerator can be set.

Instead of the main clutch 41, the front and rear wheels 1, 2
The present invention can also be applied to a case where a clutch that drives and stops only the motor is employed. Therefore, these clutches are collectively referred to as traveling clutches.

[Brief description of the drawings]

FIG. 1 is a side view of an entire rice transplanter with a riding type fertilizer.

FIG. 2 is a block diagram of a control system of an engine and an alarm device.

FIG. 3 is a plan view of a portion where a seedling amount sensor is provided.

FIG. 4 is a sectional view of the fertilizer application device.

FIG. 5 is a flowchart of control of an engine and an alarm device.

FIG. 6 is a block diagram of a control system of an engine and an alarm device according to another embodiment.

FIG. 7 is a flowchart of control of an engine and an alarm device according to another embodiment.

[Explanation of symbols]

 13 seedling mounting table 33 seedling quantity sensor 36 clutch sensor 37,51 engine control means 39a alarm device 41 running clutch

Claims (4)

[Claims] The present invention comprises a seedling amount sensor for detecting the amount of seedlings on a seedling mounting stand, and a clutch sensor for detecting an operation state of a traveling clutch. The engine control device of the rice transplanter, further comprising an engine control means for automatically lowering the engine speed to a set speed based on the information from the seedling amount sensor and the clutch sensor when is turned off. 2. An alarm device for notifying that the amount of seedlings on the seedling mounting table is less than the set remaining amount, and the alarm device is activated when the amount of seedlings on the seedling mounting table becomes less than the set remaining amount. 2. The engine control device for a rice transplanter according to claim 1, wherein the engine control device is configured to be automatically operated based on information from the seedling amount sensor. 3. The engine control device for a rice transplanter according to claim 1, wherein said engine control means does not perform an automatic raising operation after an automatic lowering operation of the engine speed. 4. When the amount of seedlings on the seedling mounting table is greater than the set remaining amount and the traveling clutch is engaged,
The engine control means is configured to automatically increase the engine speed at a slower adjustment speed than at the time of the lowering operation based on the information from the seedling amount sensor and the clutch sensor. 2. The engine control device for a rice transplanter according to 2.