JP7139838B2 - work vehicle - Google Patents

Description

TECHNICAL FIELD The present invention relates to a work vehicle including a riding rice transplanter in which a planting device for planting seedlings in a field is connected to the rear part of the vehicle body, and belongs to the technical field of agricultural machinery.

Conventionally, an HST device that changes the angle of a swash plate of a hydraulic pump by switching an HST lever to switch between forward, stop, and reverse, and to perform stepless speed change between forward and backward motions, and an output from the HST device that is controlled at a fixed speed. , road speed, and running neutral, and a riding rice transplanter equipped with a planting clutch for turning on and off the planting work of seedlings in a field (for example, prior patent document 1).

Further, in the conventional riding rice transplanter, the HST lever is provided with a planting on/off switch for performing on/off operation of the planting clutch, thereby improving operability.

JP 2015-123015 A

However, in the above-mentioned conventional work vehicle, the HST lever is provided with a planting on/off switch. Therefore, for example, when transporting a new vehicle on a truck, the minimum operating knowledge for loading and unloading the work vehicle on the truck is required. When operating the HST lever, a transporter who does not have it may unintentionally touch the planting ON/OFF switch provided on the HST lever. When such an erroneous operation is performed, there is a problem that the seedling tank of the work vehicle moves in the left-right direction on the truck bed, and the work vehicle is damaged.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a work vehicle capable of preventing erroneous operation of a change-over switch provided on a shift lever in view of such problems of the conventional work vehicle.

In order to solve the above problems, the first present invention is
an engine (20) mounted on a traveling vehicle body (2);
a working device (52) connected to the traveling vehicle body (2) and capable of performing a predetermined work on the field;
a transmission (23) for controlling transmission of power from the engine (20) to the travel system (10, 11);
A shift lever (33) for performing a switching operation to switch the output of the transmission (23),
The shift lever (33) is provided with a changeover switch (33b) for performing a switching operation of turning on/off the predetermined work of the working device (52),
A cover member is detachably attached to the changeover switch (33b), or a non-acceptance mode that does not accept the switching operation by the changeover switch (33b) can be set,
a first lever (100) for switching between on and off of the locked state of the traveling systems (10, 11);
a first detector (110) for detecting whether the locked state is turned on or off by the switching operation of the first lever (100);
A second switching operation for switching the power transmitted from the transmission (23) to one of a road speed, a work speed, and a neutral speed in which the power is not transmitted to the running system. a lever (36);
a second detector (37) for detecting which position the second lever (36) is positioned by the switching operation;
The detection result of the first detection unit (110) indicates that the locked state has been entered, and the detection result of the second detection unit (37) indicates that the second lever (110) is at the position corresponding to the neutral speed. 36) is positioned, the second detector (37) detects that the second lever (36) has been switched to a position other than the position corresponding to the neutral speed. The work vehicle is characterized in that the output of the transmission (23) is forcibly stopped when
A second aspect of the present invention is
The transmission (23) is an HST device (23) that switches the output by changing the angle of the swash plate of the hydraulic pump on the input side,
The output of the HST device (23) is forcibly stopped by setting the angle of the swash plate to a neutral state regardless of the position of the shift lever (33),
When the output of the HST device (23) is forcibly stopped, it is detected that the shift lever (33) is returned to the stop position for stopping the output from the HST device (23). The work vehicle according to the first aspect of the present invention is characterized in that the switching operation by the shift lever (33) is not accepted until after the shift lever (33) has been switched.
A third aspect of the present invention is
Under the above circumstances, when the second detection unit (37) detects that the second lever (36) has been switched to a position other than the position corresponding to the neutral speed, the traveling vehicle body (2) The work vehicle according to the first or second aspect of the present invention is characterized by comprising a display section (24) indicating that the vehicle is in a state in which it cannot travel.
The fourth aspect of the present invention is
The predetermined work of the work device (52) is a seedling planting work,
The first lever (100) is switched to the locked state, and the second lever (36) is switched to a position corresponding to the on-road speed by the second detector (37). When the switch (33b) is operated to switch the seedling planting work to the on state, the seedling planting work is not set to the on state, or the speed change device (23 ) is forcibly stopped.
A first invention related to the present invention is
an engine (20) mounted on a traveling vehicle body (2);
a working device (52) connected to the traveling vehicle body (2) and capable of performing a predetermined work on the field;
a transmission (23) for controlling transmission of power from the engine (20) to the travel system (10, 11);
A shift lever (33) for performing a switching operation to switch the output of the transmission (23),
The shift lever (33) is provided with a changeover switch (33b) for performing a switching operation of turning on/off the predetermined work of the working device (52),
The changeover switch (33b) is detachably provided with a cover member, or the changeover switch (33b) is configured to be capable of setting a non-acceptance mode in which the changeover operation by the changeover switch (33b) is not accepted. It is a work vehicle that

A second invention related to the present invention is
The work of the first invention related to the present invention, characterized by comprising a non-volatile memory (61) for recording information indicating that the non-acceptance mode has been set by setting the non-acceptance mode. is a vehicle.

Further, a third invention related to the present invention is
a first lever (100) for switching between on and off of the locked state of the traveling systems (10, 11);
a first detector (110) for detecting whether the locked state is turned on or off by the switching operation of the first lever (100);
A second switching operation for switching the power transmitted from the transmission (23) to one of a road speed, a work speed, and a neutral speed in which the power is not transmitted to the running system. a lever (36);
a second detector (37) for detecting which position the second lever (36) is positioned by the switching operation;
The detection result of the first detection unit (110) indicates that the locked state has been entered, and the detection result of the second detection unit (37) indicates that the second lever (110) is at the position corresponding to the neutral speed. 36) is positioned, the second detector (37) detects that the second lever (36) has been switched to a position other than the position corresponding to the neutral speed. The work vehicle according to the first or second invention related to the present invention is characterized in that the output of the transmission (23) is forcibly stopped when the work vehicle is in a state of emergency.

Further, a fourth invention related to the present invention is
The transmission (23) is an HST device (23) that switches the output by changing the angle of the swash plate of the hydraulic pump on the input side,
The output of the HST device (23) is forcibly stopped by setting the angle of the swash plate to a neutral state regardless of the position of the shift lever (33),
When the output of the HST device (23) is forcibly stopped, it is detected that the shift lever (33) is returned to the stop position for stopping the output from the HST device (23). The work vehicle according to the third invention related to the present invention is characterized in that the switching operation by the shift lever (33) is not accepted until after the shift lever (33) has been switched.

Further, a fifth invention related to the present invention is
Under the above circumstances, when the second detection unit (37) detects that the second lever (36) has been switched to a position other than the position corresponding to the neutral speed, the traveling vehicle body (2) The work vehicle according to the third or fourth invention related to the present invention, characterized by comprising a display section (24) indicating that the vehicle is in a state in which the vehicle cannot travel.

Further, a sixth invention related to the present invention is
The predetermined work of the work device (52) is a seedling planting work,
The first lever (100) is switched to the locked state, and the second lever (36) is switched to a position corresponding to the on-road speed by the second detector (37). When the switch (33b) is operated to switch the seedling planting work to the on state, the seedling planting work is not set to the on state, or the speed change device (23 ) is forcibly stopped .

According to the present invention, erroneous operation of the switch (33b) provided on the shift lever (33) can be prevented. According to the present invention, in addition to such effects, when the traveling system (10, 11) is locked by the switching operation of the first lever (100), the second lever (36) is When it is switched to a position other than the position corresponding to the neutral speed, the output of the transmission (23) is forcibly stopped. It is possible to prevent failures such as seizure and breakage of the brake mechanism in the locked state.
According to the first invention related to the present invention, erroneous operation of the changeover switch (33b) provided on the shift lever (33) can be prevented.

Further, according to the second invention related to the present invention, in addition to the effect of the first invention related to the above invention, the non-acceptance mode can be set even after the engine of the work vehicle is stopped and the key is turned off. can be maintained. Therefore, for example, once the factory worker sets the non-acceptance mode at the factory shipment stage, the information is recorded in the non-volatile memory (61) built into the work device, so the engine of the work vehicle can be turned off. Even when the work vehicle is started again after being stopped and the key is turned off, the state of the non-acceptance mode can be maintained, and the effectiveness of erroneous operation prevention is improved.

Further, according to the third invention related to the present invention, in addition to the effects of the first or second invention related to the present invention, the switching operation of the first lever (100) causes the travel system (10) to , 11) are in the locked state, the output of the transmission (23) is forcibly stopped when the second lever (36) is switched to a position other than the position corresponding to the neutral speed. Power is not transmitted to the traveling system (10, 11), and failures such as seizure or breakage of the brake mechanism locking the traveling system can be prevented.

Further, according to the fourth invention related to the present invention, in addition to the effects of the third invention related to the present invention, it is detected that the shift lever (33) has been returned to the stop position. By adopting a configuration in which the switching operation of the shift lever is not accepted until later, when the situation in which the output of the HST device (23) is forcibly stopped is canceled, the shift lever (33) is, for example, in the forward position. Due to this, it is possible to prevent the working device from suddenly starting to move or the machine body from suddenly starting, thereby ensuring safety.

Further, according to the fifth invention related to the present invention, in addition to the effects of the third or fourth invention related to the present invention, the switching operation of the first lever (100) causes the travel system (10) to , 11) are in the locked state, the output of the transmission (23) is forcibly stopped when the second lever (36) is switched to a position other than the position corresponding to the neutral speed. A display section (24) such as a monitor lamp or a center mascot is flashed to indicate that the traveling vehicle body (2) cannot travel because power is not transmitted to the traveling system (10, 11). and inform the worker.

Further, according to the sixth invention related to the present invention, in addition to the effect of any one of the third to fifth inventions related to the present invention, the driving system is not locked. For example, when the worker intends to start planting seedlings with a working vehicle in a field, the second lever (36) should be set to work speed, but the operator accidentally switches it to road speed. In this case, such unintended work (erroneous work) can be prevented, and workability is improved.

1 is a side view of a riding rice transplanter that is an example of a work vehicle according to an embodiment of the present invention; The top view of the riding rice transplanter of this Embodiment Schematic perspective view of the upper part of the main transmission lever of the riding rice transplanter of the present embodiment, viewed from the rear left side Block diagram showing the outline of the control system of the riding rice transplanter of the present embodiment

Hereinafter, a riding rice transplanter according to an embodiment of the work vehicle of the present invention will be described with reference to the drawings.

1 and 2 are a side view and a plan view of a riding rice transplanter 1 according to this embodiment.

As shown in the figure, in the riding rice transplanter 1 of the present embodiment, a planting device 52 is attached to the rear side of the traveling vehicle body 2 via an elevating link device 3 so as to be able to move up and down. A body portion of device 5 is provided.

The traveling vehicle body 2 is a four-wheel drive vehicle provided with a pair of left and right front wheels 10, 10 and a pair of left and right rear wheels 11, 11, which are drive wheels. A transmission case 12 is arranged in the front part of the traveling vehicle body 2, and front wheel final cases 13, 13 are provided on the left and right sides of the transmission case 12, and the steering direction of the left and right front wheel final cases 13, 13 is changed. The pair of left and right front wheels 10, 10 are respectively attached to left and right front wheel axles projecting outward from respective possible front wheel support portions.

A front end portion of a vehicle body main frame 15 is fixed to the rear surface portion of the transmission case 12. On the other hand, a rear wheel is provided horizontally in the longitudinal direction of the traveling vehicle body 2 at the center portion of the rear end of the vehicle body main frame 15. A pair of left and right rear wheel gear cases 18, 18 are supported so that they can roll about a vertical fulcrum shaft (not shown). The pair of left and right rear wheels 11, 11 are attached.

The pair of left and right rear wheel gear cases 18, 18 are provided with a pair of left and right rear wheel transmission shafts 18a, 18a that protrude from the rear wall of the transmission case 12 and are connected to the pair of left and right rear wheel gear cases 18, 18. It is configured to transmit power.

The engine 20 is mounted on the vehicle body main frame 15, and the rotational power of the engine 20 is transmitted through a belt transmission device 21 and an HST (hydrostatic stepless transmission) 23 to an auxiliary transmission mechanism in the transmission case 12. (not shown). The rotational power transmitted to the sub-transmission mechanism is changed by a plurality of gear members, and then separated into traveling power to the traveling system and externally extracted power to the PTO system such as the planting device 52 and output. .

After passing through a differential mechanism with a differential lock function, the driving power is partly transmitted to the front wheel final cases 13, 13 to drive the front wheels 10, 10, and the rest is transmitted to the left and right rear wheel gear cases 18, 18. and drives the left and right rear wheels 11 , 11 .

In addition, the sub-transmission mechanism in the transmission case 12 can switch the rotation power from the HST 23 to three speeds: road travel speed (high speed mode), travel neutral speed (neutral mode), and planting speed (low speed mode). The sub-transmission mechanism is of a gear shift type, and the operator switches the position of the sub-transmission lever 36 (see Figs. It is a configuration that can be switched to either one.

When the auxiliary transmission lever 36 is switched to the position (neutral position) corresponding to the traveling neutral speed, the power from the auxiliary transmission mechanism is output only to the PTO system side of the planting device 52 and the like. , is not output to the traveling system side.

In addition, since the planting clutch 6 (see FIG. 4) is provided between the output side of the external extraction power of the sub-transmission mechanism and the PTO system side of the planting device 52, etc., the power from the sub-transmission mechanism to the PTO system is provided. Whether the power output to the side is transmitted to the planting device 52 or the like depends on whether the planting clutch 6 is in the engaged state.

A second detection sensor 37 (see FIG. 4) is provided in the vicinity of the sub-transmission lever 36 to detect in which switching position the sub-transmission lever 36 is positioned. Note that the detection result of the second detection sensor 37 is transmitted to the control unit 60 .

In addition, the extraction power extracted from the right side surface of the transmission case 12 is transmitted to the planting device 52 by the planting transmission shaft 26 .

Power is taken out from the right rear wheel gear case 18 by a drive shaft and transmitted to the fertilizer delivery mechanism of the fertilizer applicator 5 .

Further, as shown in FIGS. 1 and 2, a center float 53a and side floats 53b and 53c are provided on the left and right sides of the planting device 52, respectively. These floats 53 slide while leveling the mud surface, and seedlings are planted by the seedling planting section 55 on the leveled ground.

Moreover, as shown in FIG. 1, the upper part of the engine 20 is covered with the engine cover 30, and the cockpit 31 is installed on it. In front of the operator's seat 31, there is a front cover 32 which incorporates various operation mechanisms and has a monitor panel (not shown) on which various operation buttons, display units, etc. are arranged on the upper surface of the operator's seat 31 side. A handle 34 for steering the front wheels 10, 10 is provided on the protruding handle post 35. - 特許庁

On the right side of the steering wheel 34, a main transmission lever 33 (see FIGS. 2 and 4) is provided for switching between forward travel and reverse travel of the traveling vehicle body 2 and for setting travel speed and the like. By operating the main shift lever 33 , the output of the HST 23 is controlled via the control section 60 . This will be further described later with reference to FIG.

FIG. 4 is a block diagram showing the outline of the control system of the riding rice transplanter 1 of this embodiment.

A main shift lever detection sensor 7 is provided to detect the amount of movement (or position, etc.) of the main shift lever 33, and the detection result is sent to the control unit 60 (see FIG. 4). By outputting a command according to the detection result to the trunnion shaft rotation motor 8, the control unit 60 changes the amount of rotation of the trunnion shaft 9 (see FIG. 4) of the HST 23 in conjunction with the operation of the main shift lever 33. Adjustment is effected by the trunnion shaft turning motor 8 . As a result, the output of the HST 23 can be switched between forward, stop, and reverse, and can be continuously variable in forward and backward travel.

A trunnion shaft 9 is connected to a swash plate provided on the hydraulic pump on the input side of the HST 23, and the tilt angle of the swash plate is changed by adjusting the amount of rotation of the trunnion shaft 9. Further, the output of the HST 23 is stopped by neutralizing the inclination of the swash plate.

Further, in the present embodiment, a planted on/off switch 33b is provided on the left side of the grip portion 33a of the main shift lever 33, and a finger lever 33c is further provided therebelow so as to protrude leftward. (See Figure 3).

FIG. 3 is a schematic perspective view of the upper portion of the main shift lever 33 as seen from the rear left side. The planting ON/OFF switch 33b outputs a predetermined signal to the control unit 60 each time the switch 33b is pressed, and the control unit 60 receives the signal and outputs a predetermined command to the planting clutch 6. FIG. Thereby, the planting clutch 6 is configured to alternately switch between the "entered" state and the "disengaged" state.

When the finger lever 33c is pushed upward with the thumb of the right hand while gripping the grip portion 33a with the four fingers of the right hand, the planting device 52 rises, and when pushed downward with the thumb of the right hand, the planting device 52 is lifted. 52 is the structure which descend|falls.

As described above, since the planting ON/OFF switch 33b is provided on the main shift lever 33, if no measures are taken, for example, when a new passenger rice transplanter 1 is loaded on a truck and transported, A transporter who has only the minimum operating knowledge for loading and unloading the riding rice transplanter 1 on and off the truck operates the main gear shift lever 33 to move forward or backward, and press the planting on/off switch 33b. There is a possibility that the seedling tank of the planting device 52 may be moved in the left-right direction on the bed of the truck due to an erroneous operation of touching the seedling unintentionally, and the tank may be damaged.

Therefore, the riding rice transplanter 1 of the present embodiment is configured to be able to set a "planting off mode" that does not accept such an erroneous operation.

That is, the setting method of the "planting cutting mode" is as follows.

When the operator presses the planting ON/OFF switch 33b for a predetermined time (eg, 5 seconds) or more, the control unit 60 determines that the "planting off mode" is set, and the "planting off mode" is set. The information indicating is recorded in the non-volatile memory 61 (see FIG. 4) built in the control unit 60, and the normal switching operation to the planting ON/OFF switch 33b is not accepted.

As a result, for example, once the factory worker sets the "planting off mode" at the factory shipment stage of the riding rice transplanter 1, the information is recorded in the non-volatile memory 61, and the riding rice transplanter is set at the factory. After the engine 20 of No. 1 is stopped and the key is turned off, even if the transporter starts the engine 20 of the riding rice transplanter 1 this time, the "planting off mode" state is maintained in the control unit 60. The control unit 60 does not accept a normal switching operation to the planting ON/OFF switch 33b, thereby improving the effectiveness of preventing erroneous operation.

Moreover, according to the above configuration, there is no need to provide a dedicated switch or the like for setting the state of the "planting cutting mode".

In addition, the setting method of the "planting off mode" is not limited to the above case. Alternatively, (2) the planting on/off switch 33b may be pressed a plurality of times (eg, 5 times) within a predetermined time (eg, 3 seconds). As a result, according to the above setting method (1), by adding stepping on the stop pedal to the setting conditions, it is possible to prevent the "planting cutting mode" from being easily set due to an erroneous operation. According to the setting method of 2), by further defining the setting conditions in detail, it is possible to prevent the "planting cutting mode" from being easily set by an erroneous operation.

In addition, when the operator performs the setting operation of the "planting cutting mode" using any one of the above-described multiple types (three types) of setting methods, the control unit 60 performs the "planting When it is determined that the "OFF mode" is set, a configuration may be adopted in which a predetermined command is output to an existing buzzer (not shown) to sound the buzzer. With this configuration, an existing buzzer can be used to notify, for example, the operator who performed the setting operation that the riding rice transplanter 1 has been set to the "planting cutting mode".

In addition, when the operator performs the setting operation of the "planting cutting mode" using any one of the above-described multiple types (three types) of setting methods, the control unit 60 performs the "planting After determining that it is set to "off mode", in order to inform the worker that the "planting off mode" is continuing, a predetermined command is output to the existing monitor lamp (not shown), and the The configuration may be such that the monitor lamp blinks. With this configuration, as described above, the information indicating that the "planting cutting mode" has been set is recorded in the nonvolatile memory 61. Thus, it is possible to notify the above-mentioned carrier or a worker who is going to plant in the field that the riding rice transplanter 1 is continuing the "planting cutting mode".

In addition, in order to inform the operator that the "planting cutting mode" is continuing, the existing center mascot lamp 24 (see FIGS. 1 and 2) is blinked, not limited to the configuration of blinking the monitor lamp. Configuration is fine.

In addition, in order to inform the operator that the "planting cutting mode" is ongoing, not only the configuration of blinking the monitor lamp, but also the existing 7-segment display (not shown) "planting cutting mode" The configuration may be such that a display is made to notify that the device is in the middle.

In addition, when the operator performs the setting operation of the "planting cutting mode" using any one of the above-described multiple types (three types) of setting methods, the "planting cutting mode" When the planting clutch 6 is in the ON state immediately before the setting operation, the control unit 60 determines that the "planting off mode" is set, and outputs a predetermined command to the planting clutch 6, The configuration may be such that the planting clutch 6 is forcibly turned off. With this configuration, it is possible to prevent the planting clutch 6 from maintaining the engaged state after entering the "planting off mode".

In addition, when the riding rice transplanter 1 is already in the "planting cutting mode", the operator can use any one of the above-described multiple types (three types) of setting methods to perform the "planting cutting mode". mode" setting operation, the control unit 60 may be configured to cancel the ongoing "planting cutting mode". As a result, the ongoing "planting cutting mode" can be canceled.

In addition, when the riding rice transplanter 1 is already in the "planting cutting mode", the operator can use any one of the above-described multiple types (three types) of setting methods to perform the "planting cutting mode". In a configuration in which the control unit 60 cancels the ongoing "planting mode" when the "mode" setting operation is performed, the control unit 60 cancels the ongoing "planting mode", A configuration may be adopted in which a predetermined command is output to an existing buzzer (not shown) to sound the buzzer. With this configuration, an existing buzzer can be used to notify, for example, the operator who has performed the cancellation operation that the setting of the "planting cutting mode" has been cancelled.

In addition, the planting apparatus 52 of this Embodiment corresponds to an example of the working apparatus of the present invention. Further, the HST 23 of the present embodiment corresponds to an example of the transmission of the present invention, and the main shift lever 33 of the present embodiment corresponds to an example of the shift lever of the present invention. Further, the planting on/off switch 33b of the present embodiment corresponds to an example of the changeover switch of the present invention, and the "planting off mode" of the present embodiment corresponds to an example of the "non-receiving mode" of the present invention.

Next, mainly with reference to FIG. 4, a "slope drive PTO mode" for safely performing PTO work even on slopes and countermeasures against erroneous operations related thereto will be described.

A slope drive PTO lever 100 (see FIG. 4) is provided around the driver's seat 31 of the riding rice transplanter 1 of the present embodiment for switching between on and off of the locked state of the front wheels 10 and the rear wheels 11. there is In addition, a first detection sensor 110 (see FIG. 4) is provided to detect whether the front wheels 10 and rear wheels 11 are locked or turned off by switching the slope drive PTO lever 100 to the "engagement" side or the "off" side. It is Note that the detection result of the first detection sensor 110 is transmitted to the control unit 60 .

In the above configuration, first, the operator sets the sub-transmission lever 36 to the neutral position.

As a result, the power from the auxiliary transmission mechanism is stopped from being transmitted to the front wheels 10 and rear wheels 11 (running system side), and can be transmitted only to the planting device 52 side (PTO system side).

Prior to setting the auxiliary gear lever 36 to the neutral position, the main gear lever 33 is set to a position (stop position) where the output of the HST 23 is "stopped". is set to the "off" state.

Further, when the second detection sensor 37 detects that the sub-transmission lever 36 has been set to the neutral position, the second detection sensor 37 sends the detection result to the control section 60 .

Next, after setting the auxiliary transmission lever 36 to the neutral position, the operator operates the slope drive PTO lever 100 to the "enter" side.

Four-wheel brakes (not shown) are operated by a lock interlocking mechanism (not shown) that interlocks with the operation of the slope drive PTO lever 100 to the "in" side, and the front wheels 10 and rear wheels 11 are locked.

The control unit 60 detects the detection result, which is transmitted from the second detection sensor 37, indicating that the sub-transmission lever 36 has been set to the neutral position, and the first detection sensor 110, which transmits the detection result indicating that the slope drive PTO lever 100 is " It is determined that the riding rice transplanter 1 has been set to the "slope drive PTO mode" by receiving the detection result indicating that it has been set to the "enter" side.

Under the "slope drive PTO mode" set in this manner, the operator then operates the planting ON/OFF switch 33b to "enter" the planting clutch 6, and further, the main transmission lever 33 is operated to a position (advance position) to set the output of HST 23 to the "advance" side.

As a result, even in a sloping farm field, the front wheels 10 and the rear wheels 11 are maintained in the locked state by operating the four-wheel brakes, and the power from the HST 23 is transferred to the planting device 52 side through the auxiliary transmission mechanism. Since it is transmitted only to (PTO system side), PTO work (for example, cleaning the planting device 52, getting off the machine and confirming the movement of the planting device (PTO), removing the remaining seedlings, etc.) can be performed safely. can do

Next, countermeasures against erroneous operation during the "slope drive PTO mode" described above will be described.

In the "slope drive PTO mode", as described above, the sub-transmission lever 36 is set to the "neutral position" and the slope drive PTO lever 100 is set to the "on" position. .

However, during the "slope drive PTO mode", the sub-transmission lever 36 may be changed from the "neutral position" to a position corresponding to the planting speed or road speed due to an operator's erroneous operation.

If such an erroneous operation occurs in the "slope drive PTO mode" and no countermeasures are taken, the power from the HST 23 will be transmitted through the sub-transmission mechanism to the braked front wheels 10 and rear wheels 11. and damage the brake mechanism.

Therefore, in the riding rice transplanter 1 of the present embodiment, in the "slope drive PTO mode", the sub-transmission lever 36 is changed from the "neutral position" to a position corresponding to the planting speed or the road speed. On the condition that the second detection sensor 37 detects that the second detection sensor 37 has detected that it has 8 to adjust the amount of rotation of the trunnion shaft 9 to neutralize the inclination of the swash plate and forcibly stop the output from the HST 23 .

As a result, the driving force output from the HST 23 becomes zero, and the driving force transmitted to the running system also becomes zero. It is possible to prevent failures such as burning or damage.

Note that the operator puts the slope drive PTO lever 100 to "on" to perform the above-described PTO work, and then returns the main transmission lever 33 to the "stop position" when stopping the PTO work. However, after that, when moving the machine to another location, the operator switches the main gearshift lever 33 to, for example, the "forward position" and shifts the auxiliary gearshift lever 36 from the "neutral position" to the "road speed". Or by switching to the "planting work speed", it tries to move the aircraft, but at this time, if the slope drive PTO lever 100 is erroneously set to the "entered" state, the control unit 60 operates, The configuration for forcibly stopping the output of the HST is as follows. That is, the swash plate connected to the trunnion shaft 9 of the HST forms an inclination angle corresponding to the "forward position". The rotating speed of the shaft rotating motor 8 is returned at a speed slower than the normal speed. This prevents the aircraft from suddenly stopping when it is about to start moving forward, thereby further ensuring safety.

In the "slope drive PTO mode", the main shift lever 33 is normally set to the "forward position", so the swash plate connected to the trunnion shaft forms an inclination angle corresponding to the "forward position". However, when the inclination of the swash plate is returned to neutral, the rotation speed of the trunnion shaft rotation motor 8 is returned at a speed slower than the normal speed. As a result, it is possible to slowly stop the driving of the PTO system of the planting device 52 and the like, so that the safety can be further ensured.

Further, in the riding rice transplanter 1 of the present embodiment, when the output from the HST 23 is forcibly stopped by the command from the control unit 60 as described above during the "slope drive PTO mode", the main gear shift lever 33 is returned to the "stop position" for stopping the output from the HST 23, the control unit 60 does not perform the switching operation by the main gear shift lever 33 unless it is detected by the main gear shift lever detection sensor 7. It was configured not to accept

Accordingly, the switching operation of the main shift lever 33 is not accepted until after the main shift lever detection sensor 7 detects that the main shift lever 33 has been returned to the "stop position" by the operator's operation. With this configuration, when the situation in which the output from the HST 23 is forcibly stopped is canceled, the PTO system of the planting device 52 and the like suddenly starts moving because the main gear shift lever 33 is in the forward position, for example. , the aircraft can be prevented from suddenly starting, and safety can be ensured.

In addition, in the riding rice transplanter 1 of the present embodiment, the second detection sensor 37 switches the auxiliary transmission lever 36 to a position other than the "center position" corresponding to the neutral speed during the "slope drive PTO mode". When this is detected, a display unit such as a monitor lamp (not shown) or the center mascot lamp 24 is flashed in response to a predetermined command from the control unit 60, so that the vehicle body 2 is in a state in which the vehicle body 2 cannot travel (a travel-impossible state). ) was configured to notify

Thus, in the "slope drive PTO mode", the operator can be notified by blinking the monitor lamp or the center mascot lamp 24 that the traveling vehicle body 2 cannot travel.

In the above configuration, by blinking a display unit such as a monitor lamp (not shown) or the center mascot lamp 24 in accordance with a predetermined command from the control unit 60, the traveling vehicle body 2 can travel during the "slope drive PTO mode". Although the explanation has been given of the configuration for informing the user that the device is in an impossible state, the present invention is not limited to this. It may be configured to inform that the traveling vehicle body 2 is in a state where it cannot travel during the "slope drive PTO mode".

In the above configuration, a configuration will be described in which a buzzer or the like is intermittently sounded in response to a predetermined command from the control unit 60 to notify that the traveling vehicle body 2 cannot travel in the "slope drive PTO mode". However, not limited to this, for example, only when the main gear shift lever detection sensor 7 detects that the main gear shift lever 33 is positioned at a position other than the "stop position", the control unit 60 intermittently emits a buzzer or the like. It is good also as a structure which sounds objectively.

As a result, when the main gear shift lever 33 is positioned at the "stop position", no power is output from the HST 23 in the first place, and no power is transmitted to the traveling system. Even if it is switched to a position other than the "position", the traveling vehicle body 2 does not start traveling and is in a safe state, so by not sounding the buzzer, annoyance can be prevented.

In addition, in the above configuration, during the "slope drive PTO mode", the auxiliary transmission lever 36 is changed from the "neutral position" to a position corresponding to the planting work speed or the road speed due to an operator's erroneous operation. Although the case where the position of the sub-transmission lever 36 is detected by the second detection sensor 37 has been described, for example, instead of the second detection sensor 37, an existing rear wheel rotation detection sensor (not shown) can be used. ) or the like, it is possible to detect whether the traveling vehicle body 2 is traveling or stopped, and when it is detected that the traveling vehicle body 2 is in the traveling state, the control unit 60 performs the main operation as described above. By sending a predetermined command to the trunnion shaft rotation motor 8 and adjusting the amount of rotation of the trunnion shaft 9 regardless of the operating position of the shift lever 33, the inclination of the swash plate is neutralized and the output from the HST 23 is forced. It is good also as a structure which stops suddenly.

Further, as described above, instead of the second detection sensor 37, the detection result of the existing rear wheel rotation detection sensor (not shown) or the like is used to adjust the amount of rotation of the trunnion shaft 9, so that the swash plate is neutralized and the output from the HST 23 is forcibly stopped, in which the rotation speed of the trunnion shaft rotation motor 8 is returned at a slower speed than the normal speed when the inclination of the swash plate is returned to neutral. It is good as As a result, it is possible to slowly stop the driving of the PTO system of the planting device 52 and the like, so that the safety can be further ensured.

Further, as described above, instead of the second detection sensor 37, the detection result of the existing rear wheel rotation detection sensor (not shown) or the like is used to adjust the amount of rotation of the trunnion shaft 9, so that the swash plate In the configuration for forcibly stopping the output from the HST 23 by setting the inclination of , to the neutral position, when the output from the HST 23 is forcibly stopped by a command from the control unit 60, the main shift lever 33 stops the output from the HST 23. The control unit 60 may be configured not to accept the switching operation by the main gearshift lever 33 until after the main gearshift lever detection sensor 7 has detected that the main gearshift lever 33 has been returned to the "stop position" for stopping. Thereby, the same effect as the above is exhibited.

Further, as described above, instead of the second detection sensor 37, the detection result of the existing rear wheel rotation detection sensor (not shown) or the like is used to adjust the amount of rotation of the trunnion shaft 9, so that the swash plate In the configuration in which the output from the HST 23 is forcibly stopped by neutralizing the inclination of the HST 23, by blinking the monitor lamp (not shown) or the center mascot lamp 24 or the like in response to a predetermined command from the control unit 60, A configuration may be used to notify that the traveling vehicle body 2 is in a state in which it cannot travel (a travel-impossible state). Thereby, the same effect as the above is exhibited.

In addition, in the above-described configuration in which the detection result of the existing rear wheel rotation detection sensor (not shown) or the like is used instead of the second detection sensor 37, a predetermined command from the control unit 60 causes the monitor lamp (not shown) or A configuration has been described in which a display unit such as the center mascot lamp 24 blinks to indicate that the traveling vehicle body 2 cannot travel in the "slope drive PTO mode". (not shown) Alternatively, in place of the display unit such as the center mascot lamp 24, a buzzer or the like may be intermittently sounded to indicate that the traveling vehicle body 2 cannot travel in the "slope drive PTO mode". good.

In addition, in the above-described configuration that uses the detection result of an existing rear wheel rotation detection sensor (not shown) instead of the second detection sensor 37, a buzzer or the like is intermittently sounded in response to a predetermined command from the control unit 60. Thus, the description has been given of the configuration for informing that the traveling vehicle body 2 cannot travel in the "slope drive PTO mode". The control unit 60 may be configured to intermittently sound a buzzer or the like only when the main shift lever detection sensor 7 detects that the main gear shift lever detection sensor 7 has detected that the main gear shift lever detection sensor 7 has changed the gear. Thereby, the same effect as the above is exhibited.

In the above configuration, as described above, the output from the HST 23 is forcibly stopped by a command from the control unit 60 as a countermeasure against erroneous operation during the "slope drive PTO mode". For example, without forcibly stopping the output from the HST 23, the monitor lamp (not shown) or the center mascot lamp 24 or the like is blinked, or a buzzer or the like is sounded. It is good also as a structure which only warns with respect to a worker.

As a result, as far as traveling is concerned, only a warning is given without restricting it, so that workability in an emergency such as when a switch or a machine breaks down is not lost.

The slope drive PTO lever 100 of the present embodiment corresponds to an example of the first lever of the present invention, and the first detection sensor 110 of the present embodiment corresponds to an example of the first detection section of the present invention. Further, the auxiliary transmission lever 36 of the present embodiment corresponds to an example of the second lever of the present invention, and the second detection sensor 37 of the present embodiment corresponds to an example of the second detection section of the present invention.

Next, in the field, the operator intends to start planting seedlings, and erroneously switches the sub-transmission lever 36 to "road speed" when it should be set to "planting speed". In such a case, the configuration and operation that prevent such unintended planting work (erroneous work) will be described.

That is, in the riding rice transplanter 1 of the present embodiment, the control unit 60 determines that the locked state of the front wheels 10 and the rear wheels 11 is the "off" state based on the detection result received from the first detection sensor 110. In this situation, it is determined from the detection result from the second detection sensor 37 that the sub-transmission lever 36 is positioned at the position corresponding to "road speed", and then the output signal from the planted on/off switch 33b When it is determined that a switching operation has been performed to switch the planting clutch 6 from the "off" state to the "on" state, the planting clutch 6 is configured not to output an "on" state command.

As a result, the operator, intending to start planting seedlings in a field, erroneously switches the sub-transmission lever 36 to the "road speed" when it should be set to the "planting speed". After that, when the planting work is to be started, such unintended planting work (erroneous work) can be prevented. It can be prevented and workability is improved.

In addition, in the case of the above configuration, the switching operation of the planting ON/OFF switch 33b performed by the operator in order to switch the planting clutch 6 from the "off" state to the "on" state was not accepted in the control unit 60. The operator may be notified of this by intermittently sounding a buzzer, blinking a planting monitor lamp (not shown), or blinking a center mascot lamp 24 (see FIG. 1).

In the above configuration, in order to prevent unintended planting work (erroneous work), the control unit 60 does not output a command to put the planting clutch 6 in the "on" state. For example, the control unit 60 sends a predetermined command to the trunnion shaft rotation motor 8 to adjust the amount of rotation of the trunnion shaft 9 regardless of the operating position of the main shift lever 33, thereby adjusting the rotation of the swash plate. A configuration may be adopted in which the tilt is neutralized and the output from the HST 23 is forcibly stopped. Even in this configuration, the same effect as described above is exhibited.

In addition, in the above configuration, the sub-transmission lever 36 is erroneously switched to the "road speed" when it should be set to the "planting work speed", and then the planting on/off switch 33b is operated to plant. Although the case where the work is about to start has been described, the control unit is not limited to this. Even if the control unit 60 determines, the control unit 60 issues a predetermined command to the planting clutch 6 to switch to the "off" state, or sends a predetermined command to the trunnion shaft rotation motor 8 to turn the trunnion shaft 9. By adjusting the amount of rotation, the inclination of the swash plate may be neutralized and the output from the HST 23 may be forcibly stopped. As a result, unintended planting work (erroneous work), such as planting at "road speed", can be prevented. Erroneous work can be prevented and workability is improved.

Further, in the above-described embodiment, in order to prevent erroneous operation of the planting on/off switch 33b provided on the main transmission lever 33, a configuration is provided in which a planting off mode that does not accept a switching operation by the planting on/off switch 33b is provided. However, not limited to this, for example, a cover member (not shown) that covers the planted on/off switch 33b so that the planted on/off switch 33b cannot be operated can be detachably attached to the surface of the main shift lever 33. It is good also as the structure which attached. Thereby, the same effect as the above is exhibited.

Further, in the above-described embodiment, the case where the "slope drive PTO mode" is mainly used in a sloped farm field has been described. Even in that case, if there is an erroneous operation in which the sub-transmission lever 36 is switched to a position other than the "neutral position", the control unit 60 forcibly stops the output from the HST 23 in the same manner as described above. , the breakage of the brake mechanism can be prevented, and the safety of PTO work can be ensured.

Further, in the above-described embodiment, as a countermeasure against erroneous operation of the auxiliary shift lever 36 during the "slope drive PTO mode", a predetermined command is sent to the trunnion shaft rotation motor 8 regardless of the operating position of the main shift lever 33. Although the structure for forcibly stopping the output from the HST 23 by adjusting the amount of rotation of the trunnion shaft 9 to neutralize the inclination of the swash plate has been described, this is not the only option. By pulling, the position of the main shift lever 33 may be forcibly moved to the "stop position". Even in this case, the same effects as described above are exhibited.

It should be noted that the condition that the slope drive PTO lever 100 can be put in the "entered" state may be that the sub-transmission lever 36 is in the "neutral position" and the main transmission lever 33 is in the "stop position".

Further, when the slope drive PTO lever 100 is "entered", the sub-transmission lever 36 may be mechanically locked so that it cannot be moved from the "neutral position".

Further, when the sub-transmission lever 36 is operated (further tilted, pulled, pushed) from the "neutral position" (the same state as when the slope drive PTO lever is turned on), the four-wheel brakes may be applied.

Further, when the slope drive PTO lever 100 is turned on, the main gear shift lever 33 can be operated both forward and backward, but the slope drive PTO lever 100 may not be operated unless the main gear shift lever 33 is in the stop position. This makes it possible to prevent sudden start.

Also, the slope drive PTO lever 100 may be configured such that it cannot be operated unless the parking pedal is turned on.

Further, the main transmission lever 33 may be guided to the stop position when the slope drive PTO lever 100 is turned off.

Also, when the slope drive PTO lever 100 is engaged, one or both of the main and sub-transmissions may be guided to neutral.

In the above embodiment, the slope drive PTO mode is turned on and off by the slope drive PTO lever 100. However, the present invention is not limited to the slope drive PTO lever 100. For example, an on/off switch may be used instead of the lever. can be

Next, in the riding rice transplanter 1 of the present embodiment, the line drawing markers 25 (see FIG. 1), which are vertically provided on both the left and right sides of the traveling vehicle body 2, are moved according to the operator's intention. A configuration for activating only the marker 25 will be described.

In the riding rice transplanter 1 of the present embodiment, a marker manual switch left and a marker manual switch that can operate (turn on and off) any one of the pair of left and right line drawing markers 25 (see FIG. 1). The right (not shown) and are arranged side by side in the lateral direction on the front side of the grip portion 33a (see FIG. 3) of the main shift lever 33. As shown in FIG. The left marker manual switch and the right marker manual switch may be of the alternate type or may be of the momentary type. This configuration example may be described as "configuration example of auto marker (1)".

As a result, by arbitrarily operating the left manual marker switch and the right manual marker switch, it is possible to actuate the drawing marker on any side based on the operator's intention.

Conventionally, there is known an automarker function that automatically alternately raises and lowers one of a pair of left and right linemarkers in response to a turning operation of a riding rice transplanter. Under the "on" state, at the start of the planting operation, one of the delineation markers automatically descends, and if it is a delineation marker on a different side than the intended side, the "switching By operating the "switch", it is replaced with the line drawing marker on the intended side. Also known is a "double switch" for lowering both draw markers. The auto marker function is turned on and off by operating an "automatic switch".

In the configuration example of the auto marker (1), when the left manual marker switch (or the right manual marker switch) is operated, the control unit 60 outputs a signal for lowering the left (or right) drawing marker. A configuration in which the output is in a standby state is also possible. This configuration example may be described as "configuration example of auto marker (2)".

Further, in the configuration example of the auto marker (2), the signal output for lowering the left (or right) drawing marker is in a standby state, and the left (or right) manual marker switch on the same side is activated. ) is operated, the control unit 60 may be configured to cancel the standby state of the signal output for lowering the left (or right) delineation marker. This configuration example may be described as "configuration example of auto marker (3)".

Further, in the configuration example of the auto marker (2), when the signal output for lowering the left (or right) line drawing marker is in the standby state, the marker left lamp (or A configuration in which the marker right lamp (not shown) blinks is also possible. Thus, by blinking the marker lamp, the operator can be notified that the signal output for lowering the left (or right) drawing marker is in a standby state. This configuration example may be described as "configuration example of auto marker (4)".

Further, in the configuration example of the automatic marker (2), when the signal output for lowering the left (or right) line marker is in the standby state and the planting device 52 is lowered, the control unit 60 Regardless of the ON/OFF state of the "automatic switch" and "both-out switch" of the auto marker function, priority is given to processing that the signal output for lowering the left (or right) drawing marker is in the standby state. To do so, a configuration may be adopted in which the left (or right) delineation marker is moved to the set position. This configuration example may be described as "configuration example of auto marker (5)".

Further, in the configuration example of the automatic marker (5), the operation of the left (or right) line drawing marker after the left (or right) manual marker switch is operated is performed only once. After the device 52 is lowered and the operation to the set position of the left (or right) drawing marker is completed, the waiting state of the signal output for lowering the left (or right) drawing marker is reset. It is good as As a result, once the manual operation of the drawing marker is completed, the manual operation of the drawing marker is reset, and the operation of the drawing marker after the reset is the conventional turning operation, that is, the raising and lowering of the planting device 52. In conjunction with the operation, the pair of left and right line drawing markers can be operated alternately. This configuration example may be described as "configuration example of auto marker (6)".

Further, in the configuration example of the auto marker (2), the signal output for lowering the left (or right) drawing marker is in a standby state, and the marker manual switch right (or marker manual switch) on the opposite side is in a standby state. left) is operated, the control unit 60 gives priority to the later operated marker manual switch, and puts the signal output for lowering the right (or left) drawing marker into a standby state. Also good. As a result, if you make a mistake in manually operating the left (or right) marker manual switch, you do not need to go out of your way to cancel the standby state by operating the left (or right) marker manual switch on the same side. If the right (or left) marker manual switch corresponding to the desired side is operated, the standby state caused by the erroneous operation is canceled and a signal for lowering the right (or left) drawing marker, which is the side to be drawn. The output can be placed in a standby state. This configuration example may be described as "configuration example of auto marker (7)".

Further, in the configuration example of the auto marker (2), the signal output for lowering the left (or right) drawing marker is in a standby state, and the marker manual switch right (or marker manual switch) on the opposite side is in a standby state. Left) is operated, the control section 60 may be configured to put the signal output for lowering both the left and right drawing markers into a standby state. As a result, the drawing markers on both the left and right sides can be manually operated at the same time, so that the drawing markers can be operated as intended by the operator. This configuration example may be described as "configuration example of auto marker (8)".

In addition, in the riding rice transplanter 1 having the automatic marker function described above, the nonvolatile memory 61 of the control unit 60 may be configured to store the left-right direction when the line-drawing marker is lowered next time. Thus, even when the work is resumed after stopping the engine, the direction of the drawing marker to be lowered is stored in the non-volatile memory 61, so that the operator does not have to bother to correct the direction of the drawing marker.

In addition, in the above-described riding rice transplanter 1, it is also possible to provide a missing plant sensor (not shown) that can detect that continuous missing plants have occurred in at least one of the two adjacent rows. good. Here, the riding rice transplanter is not limited to the mat seedling type, and may be, for example, a pot seedling type. In this configuration, when the control unit 60 determines that consecutive missing strains have been detected from the detection result of the missing strain sensor, the control unit 60 sounds a buzzer in a manner different from the normal buzzer (for example, the tone of the buzzer is changed). It is possible to call attention to workers. In addition, this configuration example may be described as "configuration example of missing strain sensor (1)".

Further, in the configuration example of the missing stock sensor (1), when consecutive missing stocks are detected, the control unit 60 may be configured to turn on/blink the lamp to notify the worker. As a result, the operator can be alerted by the display of the lamp that the stock is missing. In addition, this configuration example may be described as "configuration example of missing strain sensor (2)".

In addition, in the configuration example of the missing strain sensor (1), when consecutive missing strains are detected, the control unit 60 monitors which row the missing strain was detected from the detection result of the missing strain sensor. It may be configured to be displayed on a 7-segment display. For example, when the detection result from the missing stock detection sensor that detects the presence or absence of missing stock with the first and second rows as the detection target indicates the presence of missing stock, the control unit 60 displays the 7-segment display of the monitor. , P-12, and when the detection result from the missing stock detection sensor that detects the presence or absence of missing stock with the 7th and 8th rows as the detection target indicates the presence of missing stock, the control unit 60 , displays P-78 on the 7-segment display of the monitor. As a result, the worker can be notified of which group of rows has the missing stock by the monitor display, with two adjacent rows as one group. In addition, this configuration example may be described as "configuration example of missing strain sensor (3)".

In addition, in the configuration example of the missing strain sensor (3), when consecutive missing strains are detected by a plurality of missing strain sensors, the control unit 60 sequentially switches the display on the 7-segment display of the monitor. Also good. For example, the detection result from the missing stock detection sensor that detects the presence or absence of missing stock with the 1st and 2nd rows as the detection target, and the detection result from the missing stock detection sensor that detects the presence of the missing stock with the 5th and 6th rows as the detection target. If both the detection results indicate the presence of missing stock, the control unit 60 displays P-12 on the 7-segment display of the monitor, then displays P-56, and again displays P-12. is displayed, and then the operation of displaying P-56 is repeated. As a result, even if a plurality of missing-row sensors detect the occurrence of missing-rows, it is possible to notify the operator of which group of rows has the missing-rows on the monitor display.

Next, in the riding rice transplanter 1 of the present embodiment, a configuration for determining whether the fertilizing roll rotates properly will be described.

That is, when the planting clutch 6 is in the "engaged" state and the rear wheel rotation sensor detects that the rear wheel 11 has made one revolution, the input pulse of the fertilization delivery sensor that detects the delivery of fertilization is less than a predetermined value. (For example, less than 3 pulses), the controller 60 is configured to determine that the fertilizing roll is not rotating (that is, is stopped). Only by providing the fertilizing feed-out sensor in this manner, it is possible to detect the state in which the fertilizing roll is not rotating even though the planting clutch 6 is in the "on" state. In addition, this configuration example may be described as "configuration example of fertilization rotation quality determination (1)".

In the configuration example of the fertilizer application rotation quality determination (1), when the rear wheel rotation sensor detects that the rear wheel 11 has made one rotation, the input pulse of the fertilization feeding sensor is a predetermined value or more (for example, 3 pulses or more). ), the control unit 60 may be configured to determine that the fertilizing roll is rotating. In addition, this configuration example may be described as "configuration example of fertilization rotation quality determination (2)".

Further, in the configuration example of the fertilization rotation quality determination (1), when the planting clutch 6 is in the "disengaged" state, the control unit 60 generates a pulse from the rear wheel rotation sensor that detects one rotation of the rear wheel 11. may be reset. This is because, unless the pulse of the rear wheel rotation sensor is reset, it is not possible to know from which state the rear wheel 11 has made one revolution. In this way, by resetting the pulse of the rear wheel rotation sensor when the planting clutch 6 is in the "disengaged" state, the rear wheel 11 can be reliably detected from when the planting clutch 6 is in the "engaged" state. When has made one rotation, it is possible to determine whether the fertilizing roll is delivered. In addition, this configuration example may be described as "configuration example of fertilization rotation quality determination (3)".

Further, in the configuration example of the fertilization rotation quality determination (1), when the planting clutch 6 is in the "disengaged" state, the control unit 60 may be configured to reset the input pulse of the fertilization feeding sensor. This is because, if the fertilization delivery sensor is not configured to be reset, it will be impossible to know from which state the fertilization delivery is being monitored. In this way, when the planting clutch 6 is in the "disengaged" state, by resetting the fertilization feed-out sensor, the rear wheel 11 is reliably set to 1 when the planting clutch 6 is in the "engaged" state. At the time of rotation, it is possible to determine whether the fertilizing roll is delivered. In addition, this configuration example may be described as "configuration example of fertilization rotation quality determination (4)".

Further, in any one of the configuration examples (1) to (4) for determining whether the fertilizing rotation is good or bad, the control unit 60 may sound a buzzer when determining that the fertilizing roll is stopped. As a result, the operator can be notified that the fertilizing roll is not rotating even though the planting clutch 6 is in the "engaged" state.

Further, in any one of the configuration examples (1) to (4) for determining whether the fertilization rotation is good or bad, if the control unit 60 determines that the fertilizing roll is stopped, the existing fertilizer running out lamp or the existing fertilizer A configuration in which the clogging lamp blinks may also be used. As a result, the operator can be notified that the fertilizing roll is not rotating despite the fact that the planting clutch 6 is in the "engaged" state, and that an abnormality can be detected by blinking the lamp. becomes easier.

Further, in any one configuration example of the fertilization rotation quality determination (1) to (4), when the control unit 60 determines that the fertilizing roll is stopped, the existing fertilizer exhaustion lamp and the existing fertilizer The clogging lamp may be configured to flash simultaneously or alternately. As a result, the operator can be notified that the fertilizing rolls are not rotating even though the planting clutch 6 is in the "engaged" state. One thing becomes easier to understand.

Further, in any one of the configuration examples (1) to (4) for determining whether the fertilizing rotation is good or bad, the control unit 60 is configured to blink the existing center mascot lamp 24 when it is determined that the fertilizing roll is stopped. It is good as As a result, the operator can be notified that the fertilizing roll is not rotating despite the fact that the planting clutch 6 is in the "engaged" state, and that an abnormality can be detected by blinking the lamp. becomes easier.

Further, in any one of the configuration examples of the fertilizing rotation quality determination (1) to (4), when the control unit 60 determines that the fertilizing roll is stopped, the existing 7-segment display of the monitor displays A display (for example, display of SEHI-NG, etc.) may be provided to notify that an abnormality has occurred in the fertilizing apparatus. As a result, the operator can be notified in an easy-to-understand manner by means of a display that the fertilizing roll is not rotating even though the planting clutch 6 is in the "engaged" state.

Next, in the case where the riding rice transplanter is a pot rice transplanter, a configuration for electrically activating the water tank pump to spray water will be described.

Since the discharge timing of the water tank of conventional pot rice transplanters is determined by time, when the vehicle speed is slow, the amount of water sprayed is relatively large and the water in the water tank runs out quickly. There is a problem that the amount of spraying becomes less and mud puddles occur.

Therefore, in the pot rice transplanter of the present embodiment, when the vehicle speed is slow, the water spraying timing is delayed, and when the vehicle speed is fast, the water spraying timing is advanced. As a result, it is possible to appropriately spray water according to the vehicle speed, so that it is possible to prevent the occurrence of excessive watering and mud puddles.

In the pot rice transplanter of the above-described embodiment, the timing for spraying water is delayed when the vehicle speed is slow, and the timing for spraying water is advanced when the vehicle speed is fast. First, for example, the timing of spraying water may be determined according to the running distance (for example, spraying every 10 m traveled). As a result, it is possible to appropriately spray water according to the traveling distance, so it is possible to prevent excessive watering and the occurrence of mud pools. In the case of this configuration, when the planting clutch 6 is in the "on" state, the water spraying timing may be determined according to the travel distance (for example, spraying every 10 m traveled). Thereby, unnecessary spraying of water can be prevented except during the planting work.

In the above-described embodiment, the planting on/off switch 33b is provided on the main shift lever 33, and a configuration that can prevent erroneous operation of the planting on/off switch 33b has been described. A fertilization ON/OFF switch may be provided on the shift lever 33, and the configuration may be such that erroneous operation of the fertilization ON/OFF switch can be prevented.

INDUSTRIAL APPLICABILITY A work vehicle according to the present invention is useful as a work vehicle capable of preventing erroneous operation of a switch provided on a shift lever.

Reference Signs List 1 riding rice transplanter 2 traveling vehicle body 3 elevating link device 10 front wheel 11 rear wheel 12 transmission case 15 main frame 18 rear wheel gear case 23 HST
33 Main transmission lever 33b Planted on/off switch 34 Handle 36 Sub-transmission lever 37 Second detection sensor 52 Planting device 60 Control unit 61 Nonvolatile memory 100 Slope drive PTO lever 110 First detection sensor

Claims (4)

an engine (20) mounted on a traveling vehicle body (2);
a working device (52) connected to the traveling vehicle body (2) and capable of performing a predetermined work on the field;
a transmission (23) for controlling transmission of power from the engine (20) to the travel system (10, 11);
A shift lever (33) for performing a switching operation to switch the output of the transmission (23),
The shift lever (33) is provided with a changeover switch (33b) for performing a switching operation of turning on/off the predetermined work of the working device (52),
A cover member is detachably attached to the changeover switch (33b), or a non-acceptance mode that does not accept the switching operation by the changeover switch (33b) can be set ,
a first lever (100) for switching between on and off of the locked state of the traveling systems (10, 11);
a first detector (110) for detecting whether the locked state is turned on or off by the switching operation of the first lever (100);
A second switching operation for switching the power transmitted from the transmission (23) to one of a road speed, a work speed, and a neutral speed in which the power is not transmitted to the running system. a lever (36);
a second detector (37) for detecting which position the second lever (36) is positioned by the switching operation;
The detection result of the first detection unit (110) indicates that the locked state has been entered, and the detection result of the second detection unit (37) indicates that the second lever (110) is at the position corresponding to the neutral speed. 36) is positioned, the second detector (37) detects that the second lever (36) has been switched to a position other than the position corresponding to the neutral speed. a work vehicle , wherein the output of the transmission (23) is forcibly stopped when the The transmission (23) is an HST device (23) that switches the output by changing the angle of the swash plate of the hydraulic pump on the input side,
The output of the HST device (23) is forcibly stopped by setting the angle of the swash plate to a neutral state regardless of the position of the shift lever (33),
When the output of the HST device (23) is forcibly stopped, it is detected that the shift lever (33) is returned to the stop position for stopping the output from the HST device (23). 2. The work vehicle according to claim 1 , wherein the switching operation by the shift lever (33) is not accepted until after the shift lever (33) has been switched. Under the above circumstances, when the second detection unit (37) detects that the second lever (36) has been switched to a position other than the position corresponding to the neutral speed, the traveling vehicle body (2) 3. The work vehicle according to claim 1 , further comprising a display portion (24) for indicating that the work vehicle is in a state in which it cannot travel. The predetermined work of the work device (52) is a seedling planting work,
The first lever (100) is switched to the locked state, and the second lever (36) is switched to a position corresponding to the on-road speed by the second detector (37). When the switch (33b) is operated to switch the seedling planting work to the on state, the seedling planting work is not set to the on state, or the speed change device (23 4. The work vehicle according to any one of claims 1 to 3 , wherein the output of ) is forcibly stopped.

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