JP6188421B2 - Work vehicle - Google Patents

Description

  The present invention relates to a work vehicle that includes a vehicle main body in which a plurality of different types of work machines can be selectively connected via an elevating link mechanism, and that can raise and lower a connected work machine according to a human operation.

  The vehicle main unit, an elevating link mechanism provided in the vehicle main unit, and an elevating actuator for elevating a working machine connected through the elevating link mechanism, and according to the operation of the human operation member, 2. Description of the Related Art Conventionally, work vehicles whose actuators are controlled to operate have been widely used as tractors or the like (see, for example, Patent Document 1 below).

  Specifically, the work vehicle includes a manual elevating operation member and an automatic elevating operation member as the human operation member, and further includes a main control device that controls operation of the elevating actuator.

  In the working vehicle, the main control device performs operation control of the lifting actuator so that the work implement is lifted and lowered according to an operation amount of the manual lifting operation member when the manual lifting operation member is operated, When the automatic elevating operation member is operated, the operation of the elevating actuator is controlled so that the working machine is located at a preset retracted position (raised position) or working position (lowered position).

The retracted position and the work position are arbitrarily set by a work machine position setting member that is manually operated.
For example, the retracted position is set by a raising position setting member provided in the vehicle main unit, and the working position is set by the manual lifting operation member. That is, the main control device recognizes the operation position of the manual elevating operation member at the time when the automatic elevating operation member is operated to be lowered as the work position.

  By the way, different types of working machines such as a tiller and a broadcaster (fertilizing / seeding device) can be selectively connected to the vehicle main unit via the lifting link mechanism.

  Therefore, for example, when performing a tilling work, the tiller is connected to the vehicle main unit via the lifting link mechanism, and when spreading fertilizer, the tiller is detached from the lifting link mechanism and the broadening is performed. Connect casters.

  Here, the cultivator and the broadcaster have different shapes and sizes. Therefore, when the cultivator is replaced with the broadcaster, if the evacuation position remains set for the cultivator, the broadcaster is used when the automatic lifting operation member is raised. In some cases, the vehicle body and / or the broadcaster may be damaged.

JP 2010-133201 A

  The present invention has been made in view of such a conventional technique, and raises and lowers a working machine connected to a vehicle main unit via an elevating link mechanism according to an operation amount of a manual elevating operation member and an automatic elevating operation member. A working vehicle configured to position the working machine in a retracted position (raised position) and a working position (lowered position) in accordance with a lifting operation and a lowering operation, respectively, and a predetermined working machine performs the automatic lifting operation It is an object of the present invention to provide a working vehicle that can effectively prevent the vehicle from colliding with the vehicle main unit during a member raising operation.

  In order to achieve the above object, the present invention provides a vehicle main unit, an elevating link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and the elevating and lowering mechanism. A work vehicle comprising a lift actuator that lifts and lowers work implements connected via a link mechanism, a manual lift operation member and an automatic lift operation member that can be manually operated, and a main control device that controls operation of the lift actuator The main control device has a normal mode and a check mode, and the normal mode has a height corresponding to an operation position of the manual lifting operation member when the manual lifting operation member is operated. The actuator is controlled so as to be positioned, and the work implement is preliminarily operated during the raising and lowering operations of the automatic raising and lowering operation member. It is configured to control the operation of the lifting actuator so that it is located at the set retracted position and work position, and in the check mode, the operation control of the lifting actuator according to the operation of the manual lifting operation member is effective. However, the main controller is configured to invalidate the retracting operation control of the lifting actuator according to the raising operation of the automatic lifting operation member. When it is a caster and when it is another working machine of a different type from the broadcaster, the check mode and the normal mode can be selectively activated, respectively, and the broadcaster includes a hopper and a hopper A shutter that opens and closes the spout, a shutter actuator that operates the shutter, and the shutter A sub-control device that controls the operation of the shutter actuator, and the check mode is configured such that when the automatic lifting operation member is raised, the retraction operation control of the lifting actuator is disabled and the shutter is closed. A working vehicle for operating the shutter actuator is provided.

  In addition, the present invention provides a vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and the lift link mechanism connected via the lift link mechanism. A working vehicle comprising a lifting actuator for lifting and lowering a working machine, a manual lifting and lowering operation member that can be manually operated, and a main control device that controls operation of the lifting actuator. The control device has a normal mode and a check mode, and the normal mode is configured so that the working machine is positioned at a height corresponding to an operation position of the manual lifting operation member when the manual lifting operation member is operated. In addition to controlling the operation of the actuator, the working machine is retracted in advance at the time of raising and lowering the automatic raising / lowering operation member. The lifting / lowering actuator is controlled so as to be positioned at a work position and a working position, and the check mode is configured to enable the automatic control of the lifting / lowering actuator in accordance with the operation of the manual lifting / lowering operation member. The retraction operation control of the elevating actuator according to the raising operation of the elevating operation member is invalidated, and the main control device is configured such that the work machine connected to the vehicle main unit is a broadcaster and In the case of another working machine of a different type from the broadcaster, the check mode and the normal mode can be selectively activated, respectively, and the broadcaster opens and closes the hopper and the spray port of the hopper. A shutter, a shutter actuator for operating the shutter, and the shutter actuator And a sub-control device that controls the operation of the motor, and in the check mode, when the automatic lifting operation member is lowered, the lifting actuator is operated so that the broadcaster is positioned at the working position. Provided is a work vehicle configured to operate the shutter actuator so that the shutter is opened.

  In addition, the present invention provides a vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and the lift link mechanism connected via the lift link mechanism. A working vehicle comprising a lifting actuator for lifting and lowering a working machine, a manual lifting and lowering operation member that can be manually operated, and a main control device that controls operation of the lifting actuator. The control device has a normal mode and a check mode, and the normal mode is configured so that the working machine is positioned at a height corresponding to an operation position of the manual lifting operation member when the manual lifting operation member is operated. In addition to controlling the operation of the actuator, the working machine is retracted in advance at the time of raising and lowering the automatic raising / lowering operation member. The lifting / lowering actuator is controlled so as to be positioned at a work position and a working position, and the check mode is configured to enable the automatic control of the lifting / lowering actuator in accordance with the operation of the manual lifting / lowering operation member. The retraction operation control of the elevating actuator according to the raising operation of the elevating operation member is invalidated, and the main control device is configured such that the work machine connected to the vehicle main unit is a broadcaster and In the case of another working machine of a different type from the broadcaster, the check mode and the normal mode can be selectively activated, respectively, and the main control device stores the spraying position of the broadcaster. In the check mode, the broadcaster disperses the spray by manual operation of the manual lifting operation member. When the automatic lifting / lowering operation member is lifted and operated at a position lower than the position, the lifting / lowering actuator is operated so that the broadcaster is positioned at the spraying position. Provide vehicles.

  In addition, the present invention provides a vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and the lift link mechanism connected via the lift link mechanism. A working vehicle comprising a lifting actuator for lifting and lowering a working machine, a manual lifting and lowering operation member that can be manually operated, and a main control device that controls operation of the lifting actuator. The control device has a normal mode and a check mode, and the normal mode is configured so that the working machine is positioned at a height corresponding to an operation position of the manual lifting operation member when the manual lifting operation member is operated. In addition to controlling the operation of the actuator, the working machine is retracted in advance at the time of raising and lowering the automatic raising / lowering operation member. The lifting / lowering actuator is controlled so as to be positioned at a work position and a working position, and the check mode is configured to enable the automatic control of the lifting / lowering actuator in accordance with the operation of the manual lifting / lowering operation member. The retraction operation control of the elevating actuator according to the raising operation of the elevating operation member is invalidated, and the main control device is configured such that the work machine connected to the vehicle main unit is a broadcaster and In the case of another working machine of a different type from the broadcaster, the check mode and the normal mode can be selectively activated, respectively, and the main control device stores the spraying position of the broadcaster. The check mode is set when the broadcast start signal of the broadcaster is input. Is configured to operate the shutter actuator so that the shutter is opened after the lift actuator is operated so that the broadcaster is positioned at the spray position. Provide a working vehicle.

  According to the work vehicle according to the present invention, the main control device raises and lowers the work implement according to the operation of the manual elevating operation member and is connected to the vehicle main unit according to the raising operation and the lowering operation of the automatic elevating operation member. In addition to the normal mode in which the working machine is positioned at the retracted position and the working position, the raising / lowering of the working machine according to the operation of the manual raising / lowering operation member is enabled while the raising / lowering of the automatic raising / lowering operation member is performed. There is a check mode that disables the movement of the work equipment to the retracted position, and the work equipment connected to the vehicle main body is a broadcaster or other work equipment of a different type from the broadcaster In addition, the check mode and the normal mode can be selectively activated, respectively, and the check mode is determined when the automatic lifting operation member is raised. Since the shutter actuator is operated so as to close the shutter while disabling the avoidance operation control, when the work machine connected to the vehicle main body is a work machine other than the broadcaster, the automatic lifting / lowering operation is performed. When the working machine connected to the vehicle main unit is a broadcaster while enabling movement to the retracted position according to the raising operation of the operation member, the broadcaster is not operated when the automatic raising / lowering operation member is raised. The broadcaster can be effectively prevented from colliding with the vehicle main unit, and the broadcaster can be simply operated by raising the automatic lifting operation member in a state where the broadcaster is positioned at a work position and performing a spraying operation. The spraying work by can be stopped immediately.

FIG. 1 is a schematic side view of a working vehicle according to an embodiment of the present invention. FIG. 2 is a control block diagram of the working vehicle shown in FIG. FIG. 3 is a schematic side view of a broadcaster connected to the vehicle main body in the working vehicle shown in FIG.

Hereinafter, preferred embodiments of a working vehicle according to the present invention will be described with reference to the accompanying drawings.
FIGS. 1 and 2 show a schematic side view and a control block diagram of the working vehicle 1 according to the present embodiment, respectively.

  As shown in FIGS. 1 and 2, the working vehicle 1 includes a vehicle main unit 10 that can travel, and a lift link that is provided on the vehicle main unit 10 so that different types of work units can be detachably connected. A mechanism 60, a lifting actuator 50 that lifts and lowers working machines connected via the lifting link mechanism 60, a manually-operable manual lifting / lowering operation member 30 and an automatic lifting / lowering operation member 32, and operation control of the lifting / lowering actuator 50. And a main control device 90 that manages the above.

  As shown in FIG. 1, the vehicle main unit 10 includes a vehicle body frame 11, a drive source 12 supported by the vehicle body frame 11, and a front wheel 13 supported by the vehicle body frame 11 and at least one of which is a drive wheel. And a rear wheel 14, a transmission 15 that receives rotational power from the driving source 12 and outputs rotational power shifted toward the driving wheel, and a driver seat 16 supported by the vehicle body frame 11. Yes.

A steering operation member 17 for steering a steered wheel (usually the front wheel 13) is provided in front of the driver seat 16.
The manual elevating operation member 30 and the automatic elevating operation member 32 are arranged in the vicinity of the driver's seat 16 so that the operator seated in the driver's seat 16 can perform an artificial operation.

  In the present embodiment, the vehicle main unit 10 includes a cabin 20, and the driver seat 16, the steering operation member 17, the manual lifting operation member 30, and the automatic lifting operation member 32 are included in the cabin 20. Is placed inside.

The elevating link mechanism 60 has various types of working machines as long as different types of working machines can be selectively connected to the vehicle main unit 10 and the connected working machines can be raised and lowered with respect to the vehicle main body 10. Can take form.
In the present embodiment, as shown in FIG. 1, the lifting link mechanism 60 is a three-point link mechanism including a top link 61 and a pair of left and right lower links 62.

Although not shown, the elevating actuator 50 includes, for example, a hydraulic cylinder, a piston that is housed in the hydraulic cylinder so as to freely advance and retract, and an electromagnetic valve that switches supply and discharge of pressure oil to the oil chamber of the hydraulic cylinder. Can be prepared.
In this case, the operation of the solenoid valve is controlled by the main controller 90.

The manual lifting operation member 30 is a member that is manually operated when the working machine is positioned at an arbitrary height.
Specifically, the work vehicle 1 is provided with a manual lift position sensor 31 that detects an operation position of the manual lift operation member 30, and the main control device 90 is based on a signal from the manual lift position sensor 31. The operation position of the manual elevating operation member 30 can be recognized.

Furthermore, the work vehicle 1 is provided with a work machine position sensor that directly or indirectly detects the position of the work machine, and the main control device 90 is configured to output a signal from the manual lift position sensor 31. The elevating actuator 50 is operated so as to be positioned at a height corresponding to the above.
The work implement position sensor 51 may be, for example, a sensor that detects an operation state of the lift actuator 50.

The automatic raising / lowering operation member 32 is a member that is manually operated when the working machine is positioned at a preset retracted position (raised position) or working position (lowered position).
The operation control of the lift actuator 50 based on the operation of the automatic lift operation member 32 will be described later.

  In the work vehicle 1 according to the present embodiment, the main control device 90 can selectively activate the normal mode or the check mode according to the type of work machine connected to the vehicle main unit 10. It is configured.

First, the normal mode will be described.
When the normal mode is activated, the main control device 90 is configured such that when the manual lifting operation member 30 is operated, the work machine is positioned at a height corresponding to the operation position of the manual lifting operation member 30. When the automatic elevating operation member 32 is operated while controlling the operation of the elevating actuator 50, the working machine is positioned at a preset retracted position (raised position) or working position (lowered position). It is configured to control the operation of the lift actuator 50.

Specifically, the work vehicle 1 is provided with a work machine position setting member for presetting the retracted position and the work position.
At the time of starting the normal mode, when the automatic lifting operation member 32 is raised, the main controller 90 operates the lifting actuator 50 so that the working machine is located at the retracted position. When the automatic elevating operation member 32 is lowered, the elevating actuator 50 is operated so that the working machine is located at the working position.

  Note that, for example, the position setting dial 34 and the manual lifting operation member 30 provided in the work vehicle 1 so as to be manually operable are used as the work implement position setting member.

  That is, the main controller 90 recognizes the position (height) set by the position setting dial 34 as the retracted position, and at the time when the automatic elevating operation member 32 is operated to be lowered, the manual elevating operation member 30. The position (height) set by is recognized as the work position.

Next, the check mode will be described.
At the time of starting the check mode, the main control device 90 responds to the raising operation of the automatic elevating operation member 32 while enabling the operation control of the elevating actuator 50 according to the operation of the manual elevating operation member 30. Further, the retracting operation control of the lifting actuator 50 is invalidated.

  That is, when the manual lifting / lowering operation member 30 is operated, the main control device 90 allows the work implement to move the manual lifting / lowering operation member regardless of whether the normal mode or the check mode is activated. The elevating actuator 50 is operated so as to be positioned at a position (height) corresponding to the operation position 30.

  On the other hand, when the automatic raising / lowering operation member 32 is operated, the main control device 90 performs the raising / lowering operation of the automatic raising / lowering operation member 32 when the normal mode is activated. While the lifting actuator 50 is operated so that the working machine is positioned at the retracted position and the working position, respectively, the startup of the check mode causes the working machine to be moved according to the raising operation of the automatic lifting operation member 32. The retraction operation control of the elevating actuator 0 positioned at the retreat position is not performed.

  In addition, when the automatic elevating operation member 32 is operated to be lowered when the check mode is activated, the operation control of the elevating actuator 50 that positions the work implement at the work position may be performed, or such It is also possible to configure so that the operation control of the lift actuator 50 is not performed.

  In the working vehicle 1 having such a configuration, when a predetermined working machine is connected, the predetermined working machine collides with the vehicle main unit 10 when the automatic elevating operation member 32 is raised. Can be effectively prevented.

  That is, different types of working machines such as a rotary tiller and a broadcaster (fertilizing / seeding device) can be selectively connected to the vehicle main unit 10 via the lifting link mechanism 60.

Different types of work machines have unique shapes and sizes.
Therefore, in the conventional working vehicle, for example, after the rotary tiller is connected to the vehicle main unit 10 and then the tilling work is performed, the rotary tiller is removed and the broadcaster is connected to the vehicle main unit 10. In this case, if the setting of the retracted position remains for the rotary cultivator, the broadcaster collides with the vehicle main unit 10 when the automatic elevating operation member 32 is raised, and in some cases, The vehicle main unit 10 and / or the broadcaster may be damaged.

  On the other hand, in the working vehicle 1 according to the present embodiment, as described above, the main control device 90 can selectively start the normal mode or the check mode.

  Accordingly, when the rotary tiller is connected to the vehicle main unit 10, the normal mode is activated to move the working machine to the retracted position according to the one-touch raising operation of the automatic lifting operation member 32. In addition, when the broadcaster is connected, the restraint mode is activated to cause the broadcaster to collide with the vehicle main unit 10 when the automatic lifting operation member 32 is raised. Can be effectively avoided.

  Note that whether the normal mode or the check mode is activated may be determined by a manual operation by an operator, or the main control device 90 and the sub control device 190 provided in the work implement. You may decide by automatic communication between.

  The former mode is realized by a mode selection switch 25 provided in the vehicle main unit 10 (see FIG. 2).

  In the latter mode, mode information related to the type of work implement and the control mode to be activated is stored in the main control device 90 and recognized based on automatic communication between the main control device 90 and the sub control device 190. This is realized by the main controller 90 determining based on the type of work implement to be performed and the mode information.

  In any aspect, preferably, the type of the control mode that is currently activated can be displayed on the monitor 22 (see FIG. 1) provided in the vehicle main unit 1.

  In the latter mode, preferably, the monitor 22 can be configured to display whether or not a work implement is connected, and when connected, display the type of the work implement.

  As shown in FIG. 1, when the broadcaster 100 is connected as the working machine, the check mode can further perform the following control.

FIG. 3 shows an enlarged schematic diagram of the broadcaster 100.
As shown in FIG. 3, the broadcaster 100 controls the operation of the hopper 101, the shutter 102 that opens and closes the spray port of the hopper 101, the shutter actuator 110 that opens and closes the shutter 102, and the shutter actuator 110. The sub-control device 190 (see FIG. 2).

  As shown in FIG. 3, the broadcaster 100 further includes a frame 104 that supports the hopper 101 and is connected to the lift link mechanism 60, and a PTO shaft in the vehicle main unit 115 via a transmission shaft 115. It has a spraying blade 105 which is operatively connected and scatters the sprayed material falling through the shutter 102.

  The shutter actuator 110 is operatively connected to the shutter 102 via a link mechanism 111.

  As shown in FIGS. 2 and 3, the vehicle main unit 10 and the broadcaster 100 include a main unit side spraying switch 36 for switching ON / OFF of a spraying operation by the broadcaster 100 and a work unit side. A spray switch 136, a main unit side shutter opening degree adjusting member 38 for adjusting the opening degree of the shutter 102, and a work unit side shutter opening degree adjusting member 138 are provided.

Further, as shown in FIGS. 2 and 3, the broadcaster 100 is provided with a shutter opening sensor 103 that detects the opening of the shutter 102.
In the present embodiment, the shutter opening sensor 103 detects the posture (angle around the rotation axis) of one constituent member in the link mechanism 111.

  In the case where the broadcaster 100 is connected as the working machine, the check mode is such that the retraction operation control of the elevating actuator 50 is disabled when the automatic elevating operation member 32 is raised, and the shutter 102 is operated. The shutter actuator 110 may be actuated so as to close.

  According to such a configuration, the spraying work by the broadcaster 100 is immediately stopped by simply raising the automatic lifting operation member 32 while the spraying work is performed with the broadcaster 110 positioned at the work position. Can be made.

  That is, the sprayer ON / OFF switching by the broadcaster 100 is normally performed by the main unit side spray switch 36 provided in the vehicle main unit 10 or the work unit side spray switch 136 provided in the broadcaster. Is called.

  Therefore, in a conventional work vehicle equipped with the broadcaster 100, in order to stop the spraying operation of the broadcaster 100, the main unit side spray switch 36 or the work unit side spray switch 136 must be stopped. Don't be.

On the other hand, when the operator raises the automatic elevating operation member 32, it can be estimated that there is an intention to stop the spraying work by the broadcaster 100.
In consideration of this point, when the automatic lifting / lowering operation member 32 is raised while the spreader 100 is positioned at the work position and the spraying operation is performed, the retracting operation control of the lifting / lowering actuator 50 is performed. While being disabled, the shutter actuator 110 can be operated so that the shutter 102 is closed.

  That is, in the check mode, the raising operation of the automatic raising / lowering operation member 32 is substituted for the operation of stopping the spreading operation of the broadcaster 100.

  Alternatively or in addition, when the automatic elevating operation member 32 is lowered, the elevating actuator 50 is operated so that the broadcaster 100 is positioned at the working position, and then the shutter 102 is opened. Thus, the shutter actuator 110 can be operated.

  According to such a configuration, it is possible to improve the operability when starting the spraying work by the broadcaster 100.

  Preferably, the main controller 90 can store the spraying position of the broadcaster 100, and the broadcaster 100 is positioned at a lower position than the spraying position by manual operation of the manual lifting operation member 30. When the automatic raising / lowering operation member 32 is raised, the check mode can operate the raising / lowering actuator 50 so that the broadcaster 100 is located at the spraying position.

  According to such a configuration, it is possible to improve operability when the broadcaster 100 is positioned at the spray position.

  That is, in general, the work position set by the manual elevating operation member 30 is adjusted to the optimum spray position for spray work (for example, the height at which the spray port of the broadcaster 100 is 600 mm from the ground). After that, the broadcaster 100 is positioned at the spraying position by the lowering operation of the automatic elevating operation member 32 without operating the manual elevating operation member 30.

  However, when the fertilizer is replenished to the hopper 101, the broadcaster 100 may be positioned at a position lower than the spraying position. In this case, the position of the broadcaster 100 is lowered by the manual lifting operation member 30. Therefore, when the replenishment of the fertilizer is finished, the manual lifting operation member 30 needs to place the broadcaster 100 at the spraying position again.

  On the other hand, when the automatic raising / lowering operation member 32 is operated while the broadcaster 100 is positioned lower than the spraying position, the broadcaster 100 is positioned at the spraying position. If the lifting / lowering actuator 50 is operated, the operability when the broadcaster 100 is positioned at the spraying position can be improved.

  Preferably, in the check mode, when the spreader 100 is not positioned at the spraying position when the spraying start signal of the broadcaster 100 is input, the broadcaster 100 is set at the spraying position. The shutter actuator 110 can be operated so that the shutter 102 is opened after the lift actuator 50 is operated to be positioned.

  According to such a configuration, it is possible to effectively prevent the spreading work by the broadcaster 100 from being performed outside the spraying position.

  The spray position to be stored in the main control device 90 is a work electrically connected to the machine side spray position input means 40 or the sub control device 190 electrically connected to the main control device 90. It is input artificially through the machine side spray position input means 140.

1 Working Vehicle 10 Vehicle Main Unit 30 Manual Elevating Operation Member 32 Automatic Elevating Operation Member 50 Elevating Actuator 60 Elevating Link Mechanism 90 Main Control Device 100 Broadcaster 101 Hopper 102 Shutter 110 Shutter Actuator 190 Sub Control Device

Claims (4)

A vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and a work unit connected via the lift link mechanism. A working vehicle comprising an elevating actuator for raising and lowering, a manual elevating operation member and an automatic elevating operation member that can be manually operated, and a main control device that controls operation of the elevating actuator,
The main control device has a normal mode and a check mode,
In the normal mode, during the operation of the manual elevating operation member, the operation of the elevating actuator is controlled so that the work machine is positioned at a height corresponding to the operation position of the manual elevating operation member, and the automatic elevating operation member It is configured to control the operation of the lifting actuator so that the working machine is located at a preset retracted position and working position at the time of raising operation and lowering operation, respectively.
In the check mode, the operation control of the lifting / lowering actuator according to the operation of the manual lifting / lowering operation member is enabled, while the retracting operation control of the lifting / lowering actuator according to the lifting operation of the automatic lifting / lowering operation member is disabled. Configured,
The main control device selects the check mode and the normal mode, respectively, when the work machine connected to the vehicle main unit is a broadcaster and when the work machine is another type of work machine different from the broadcaster. Can be activated automatically,
The broadcaster includes a hopper, a shutter that opens and closes a spray port of the hopper, a shutter actuator that operates the shutter, and a sub-control device that controls the operation of the shutter actuator.
In the check mode, when the automatic elevating operation member is raised, the shutter actuator is operated so that the shutter is closed while invalidating the retracting operation control of the elevating actuator. A vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and a work unit connected via the lift link mechanism. A working vehicle comprising an elevating actuator for raising and lowering, a manual elevating operation member and an automatic elevating operation member that can be manually operated, and a main control device that controls operation of the elevating actuator,
The main control device has a normal mode and a check mode,
In the normal mode, during the operation of the manual elevating operation member, the operation of the elevating actuator is controlled so that the work machine is positioned at a height corresponding to the operation position of the manual elevating operation member, and the automatic elevating operation member It is configured to control the operation of the lifting actuator so that the working machine is located at a preset retracted position and working position at the time of raising operation and lowering operation, respectively.
In the check mode, the operation control of the lifting / lowering actuator according to the operation of the manual lifting / lowering operation member is enabled, while the retracting operation control of the lifting / lowering actuator according to the lifting operation of the automatic lifting / lowering operation member is disabled. Configured,
The main control device selects the check mode and the normal mode, respectively, when the work machine connected to the vehicle main unit is a broadcaster and when the work machine is another type of work machine different from the broadcaster. Can be activated automatically,
The broadcaster includes a hopper, a shutter that opens and closes a spray port of the hopper, a shutter actuator that operates the shutter, and a sub-control device that controls the operation of the shutter actuator.
In the check mode, when the automatic elevating operation member is operated to lower, the elevating actuator is operated so that the broadcaster is positioned at the working position, and the shutter actuator is operated so that the shutter is opened. A working vehicle characterized by that. A vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and a work unit connected via the lift link mechanism. A working vehicle comprising an elevating actuator for raising and lowering, a manual elevating operation member and an automatic elevating operation member that can be manually operated, and a main control device that controls operation of the elevating actuator,
The main control device has a normal mode and a check mode,
In the normal mode, during the operation of the manual elevating operation member, the operation of the elevating actuator is controlled so that the work machine is positioned at a height corresponding to the operation position of the manual elevating operation member, and the automatic elevating operation member It is configured to control the operation of the lifting actuator so that the working machine is located at a preset retracted position and working position at the time of raising operation and lowering operation, respectively.
In the check mode, the operation control of the lifting / lowering actuator according to the operation of the manual lifting / lowering operation member is enabled, while the retracting operation control of the lifting / lowering actuator according to the lifting operation of the automatic lifting / lowering operation member is disabled. Configured,
The main control device selects the check mode and the normal mode, respectively, when the work machine connected to the vehicle main unit is a broadcaster and when the work machine is another type of work machine different from the broadcaster. Can be activated automatically,
The main control device stores a spraying position of the broadcaster,
In the check mode, when the automatic lifting / lowering operation member is raised by the manual operation of the manual lifting / lowering operation member while the broadcaster is positioned lower than the spraying position, the broadcaster is A working vehicle, wherein the lift actuator is operated so as to be located at the spray position. A vehicle main unit, a lift link mechanism provided on the vehicle main unit and capable of detachably connecting different types of work machines including a broadcaster, and a work unit connected via the lift link mechanism. A working vehicle comprising an elevating actuator for raising and lowering, a manual elevating operation member and an automatic elevating operation member that can be manually operated, and a main control device that controls operation of the elevating actuator,
The main control device has a normal mode and a check mode,
In the normal mode, during the operation of the manual elevating operation member, the operation of the elevating actuator is controlled so that the work machine is positioned at a height corresponding to the operation position of the manual elevating operation member, and the automatic elevating operation member It is configured to control the operation of the lifting actuator so that the working machine is located at a preset retracted position and working position at the time of raising operation and lowering operation, respectively.
In the check mode, the operation control of the lifting / lowering actuator according to the operation of the manual lifting / lowering operation member is enabled, while the retracting operation control of the lifting / lowering actuator according to the lifting operation of the automatic lifting / lowering operation member is disabled. Configured,
The main control device selects the check mode and the normal mode, respectively, when the work machine connected to the vehicle main unit is a broadcaster and when the work machine is another type of work machine different from the broadcaster. Can be activated automatically,
The main control device stores a spraying position of the broadcaster,
In the check mode, when the broadcasting start signal of the broadcaster is input, if the broadcaster is not positioned at the spraying position, the lifting actuator is set so that the broadcaster is positioned at the spraying position. A working vehicle that operates the shutter actuator so that the shutter is opened after being operated.

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