Agricultural machinery

Abstract

The present invention is configured so as to make it possible to change the stopping of autonomous travel in accordance with conditions. An agricultural machine (1) comprises: a vehicle body (3) capable of travel; an obstacle detection device (45) that can detect an obstacle; an autonomous travel control unit (40A) that executes autonomous travel of the vehicle body (3), and that stops the vehicle body (3) on the basis of detection information pertaining to an obstacle detected by the obstacle detection device (45) during autonomous travel; and a mode-switching unit (40B) that switches to either of an active mode in which stopping of the vehicle body (3) is executed, or an inactive mode in which stopping of the vehicle body (3) is not executed, on the basis of the detection information during autonomous travel within a field (H1).

Description

[Technical field]

[0001] The present invention relates to agricultural machinery such as a tractor, a combine harvester, a rice transplanter, etc. [Background technology]

[0002] Conventionally, there is known an agricultural machine disclosed in Patent Document 1. The agricultural machine (farm work vehicle) disclosed in Patent Document 1 is capable of autonomous driving, and is equipped with an obstacle detection device (obstacle detection means) capable of detecting an obstacle present in front of the vehicle body, and is capable of stopping the autonomous driving when an obstacle is detected. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2008-92818 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the agricultural machine disclosed in Patent Document 1, although the obstacle detection device can stop the vehicle body when it detects an obstacle, in some fields crops or other objects may be detected as obstacles, causing the vehicle body to stop unnecessarily.

[0005] In view of the above circumstances, an object of the present invention is to provide an agricultural machine that can change the stopping conditions of automatic traveling depending on the situation. [Means for solving the problem]

[0006] The agricultural machine includes a vehicle body capable of traveling, an obstacle detection device capable of detecting an obstacle, an automatic traveling control unit that executes automatic traveling of the vehicle body and stops the traveling of the vehicle body based on detection information related to an obstacle detected by the obstacle detection device during the automatic traveling, and an effective mode that is capable of stopping the traveling of the vehicle body based on the detection information during the automatic traveling. The vehicle body is not stopped based on the detection information. and a mode switching unit that switches the automatic travel control unit to either a disabled mode or a disabled mode.

[0007] The above-mentioned agricultural machine is equipped with a support member on which the obstacle detection device is attached, and the support member is capable of changing the position of the obstacle detection device between a detection position where the obstacle can be detected and a retracted position where the obstacle cannot be detected, and the automatic driving control unit is capable of performing the automatic driving when the automatic driving control unit is in the disabled mode and the obstacle detection device is in the retracted position.

[0008] The above-mentioned agricultural machine is equipped with a seating detection device that detects a person sitting in the driver's seat, and the automatic driving control unit is capable of executing the automatic driving when the seating detection device detects that a person is sitting in the driver's seat.

[0009] The above-mentioned agricultural machine includes a support member to which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position at which the obstacle can be detected and a retreat position at which the obstacle cannot be detected; The obstacle detection device The retreat position To In a certain case, the mode switching unit is allowed to switch from the valid mode to the invalid mode, and The obstacle detection device The detection position To and a switching inhibition section which, in a certain case, does not permit switching from the valid mode to the invalid mode.

[0010] The above-mentioned agricultural machine is equipped with a seating detection device that detects whether or not a person is seated in the driver's seat, and a switching inhibition unit that allows the mode switching unit to switch from the valid mode to the invalid mode when the seating detection device detects that a person is seated, and does not allow the mode switching from the valid mode to the invalid mode when the seating detection device detects that a person is not seated.

[0011] The agricultural machine is equipped with a seating detection device that detects whether or not a person is seated in the driver's seat, and the automatic driving control unit continues the automatic driving if the seating detection device detects that a person is seated during the automatic driving, and stops the automatic driving if the seating detection device detects that a person is not seated.

[0012] The above-mentioned agricultural machine includes a support member to which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position where the obstacle can be detected and a retreat position where the obstacle cannot be detected, and the automatic travel control unit is configured to The obstacle detection device The retreat position To If there is, the automatic driving is continued, and The obstacle detection device From the retracted position The above At the detection position Reposition If so, the automatic travel is stopped.

[0013] The above-mentioned agricultural machine includes a prime mover and an ignition switch that switches the drive of the prime mover between ON and OFF, and the mode switching unit sets the effective mode as a default when the ignition switch is switched from OFF to ON, and switches to the effective mode when the ignition switch is switched from ON to OFF in the ineffective mode.

[0014] The above-mentioned agricultural machine is provided with a display device that indicates whether the machine is in the valid mode or the invalid mode.

[0015] When the automatic driving control unit is in the effective mode and acquires, as the detection information, information that the obstacle detection device has detected an obstacle, the automatic driving control unit stops the vehicle body.

[0016] When the obstacle detection device is in the disabled mode, even if the obstacle is detected, the obstacle detection device does not output a notification that the obstacle has been detected to the automatic driving control unit.

[0017] When the automatic driving control unit is in the enabled mode, the obstacle detection device notifies the automatic driving control unit of the detection of an obstacle during the automatic driving, and when the automatic driving control unit is in the disabled mode, the obstacle detection device does not notify the automatic driving control unit of the detection of the obstacle.

[0018] The above-mentioned agricultural machine is equipped with a support member on which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position where the obstacle can be detected and a retracted position where the obstacle cannot be detected, and the automatic driving control unit is capable of starting the automatic driving when the automatic driving control unit is in the effective mode and the obstacle detection device is at the detection position, is capable of stopping the automatic driving when the automatic driving control unit is in the effective mode and the obstacle detection device is at the retracted position, is capable of stopping the automatic driving when the automatic driving control unit is in the disabled mode and the obstacle detection device is at the detection position, and is capable of starting the automatic driving when the automatic driving control unit is in the disabled mode and the obstacle detection device is at the retracted position.

[0019] The above-mentioned agricultural machine is equipped with a seating detection device that detects a person sitting in the driver's seat, and the automatic driving control unit is capable of executing the automatic driving when the seating detection device detects that a person is sitting in the driver's seat.

[0020] The above-mentioned agricultural machinery is The obstacle detection device The retreat position To In a certain case, the mode switching unit is allowed to switch from the valid mode to the invalid mode, and The obstacle detection device The detection position ToA switching inhibition unit that does not permit switching from the valid mode to the invalid mode in a certain case of It is prepared. Effect of the Invention

[0021] According to the present invention, the conditions for stopping automatic driving can be changed depending on the situation. [Brief description of the drawings]

[0022] [Figure 1] 1 is an overall plan view of a tractor according to an embodiment of the present invention. [Diagram 2] 1 is an overall side view of a tractor according to an embodiment of the present invention. [Diagram 3] FIG. 2 is an enlarged side view of the front portion of the tractor according to the present embodiment. [Figure 4] 1 is a front view of a tractor when an obstacle detection device according to an embodiment of the present invention is in a detection position. FIG. [Diagram 5] 1 is a front view of a tractor when an obstacle detection device according to an embodiment of the present invention is in a retracted position. [Figure 6] FIG. 2 is a block diagram of a control system of the tractor according to the present embodiment. [Figure 7] 2 is a plan view showing the obstacle detection device according to the present embodiment with a cover as a detection position, in phantom lines; FIG. [Figure 8] 4 is a side view of the front part of the tractor when the obstacle detection device according to the present embodiment is in a detection position. FIG. [Figure 9] FIG. 2 is a perspective view of the cover body according to the embodiment with a separation cover removed. [Figure 10] FIG. 2 is a front perspective view of a support member, a position changing mechanism, etc. according to the present embodiment. [Figure 11] FIG. 2 is a rear perspective view of a support member, a position changing mechanism, etc. according to the present embodiment. [Figure 12] FIG. 2 is a front perspective view of a position changing mechanism and the like according to the present embodiment. [Figure 13] FIG. 2 is a plan view of a support member, a handle, and the like according to the present embodiment. [Figure 14]1 is a front perspective view of a position changing mechanism and the like in this embodiment, with the front support plate and one plate omitted. FIG. [Figure 15] 4 is a front view of a position changing mechanism and the like when the obstacle detection device according to the present embodiment is in a detection position. FIG. [Figure 16] 4 is a front view of a position changing mechanism and the like when the obstacle detection device according to the present embodiment is in a retracted position. FIG. [Figure 17] FIG. 2 is a diagram showing an example of a creation screen M1 according to the present embodiment. [Figure 18] FIG. 13 is a diagram showing an example of a setting screen M2 according to the present embodiment. [Figure 19A] FIG. 4 is a diagram showing an operation flow of automatic driving according to the present embodiment. [Figure 19B] 19B is a diagram showing an operation flow of automatic driving according to this embodiment, which is different from that shown in FIG. 19A. [Figure 19C] 19C is a diagram showing an operation flow of automatic driving according to this embodiment, which is different from that shown in FIG. 19A and FIG. 19B. [Figure 20] FIG. 4 is a diagram showing a screen of a display device during automatic driving according to the present embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0023] Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

[0024] 1 and 2 show one embodiment of an agricultural machine 1 according to the present invention. In this embodiment, the agricultural machine 1 will be described as a tractor 1. However, the agricultural machine 1 may be other agricultural machines (agricultural vehicles) such as a combine harvester, rice transplanter, etc., in addition to the tractor.

[0025] 1 and 2 will be referred to as the forward direction, the rearward direction, the leftward direction, the rightward direction, and the width direction of the vehicle body. Also, the direction away from the center of the vehicle body width direction (arrow D1 direction) will be referred to as the outward direction (or outward direction) of the vehicle body width direction, and the direction toward the center of the vehicle body width direction (arrow D2 direction) will be referred to as the inward direction (or inward direction) of the vehicle body width direction.

[0026] The tractor will be described below. As shown in FIG. 1 and FIG. 2, the tractor 1 includes a vehicle body 3, a prime mover 4, and a transmission 5. The vehicle body 3 is provided with a traveling device 7. The traveling device 7 supports the vehicle body 3 so that it can travel, and has front wheels 7F and rear wheels 7R. The front wheels 7F and rear wheels 7R are tire-type wheels in this embodiment, but may be crawler-type wheels. The prime mover 4 is an engine (diesel engine, gasoline engine), an electric motor, or the like. The transmission 5 can change the propulsive force of the traveling device 7 by changing the speed, and can switch the traveling device 7 between forward and reverse. The vehicle body 3 is provided with a driver's seat 10. The driver's seat 10 is protected by a protection device 9. In this embodiment, the protection device 9 is a cabin that protects the driver's seat 10 by surrounding the front, rear, upper, and sides of the driver's seat 10, but may also be a rope that protects the driver's seat 10 by covering at least the upper part of the driver's seat 10. A fender 13 is attached below the protection device 9, and covers the upper part of the rear wheel 7R.

[0027] A coupling section (not shown) configured with a three-point link mechanism or the like is provided at the rear of the vehicle body 3. A working device (such as an implement) can be detachably coupled to the coupling section. By coupling the working device to the coupling section, the working device can be towed by the vehicle body 3. The working devices include a tilling device for tilling, a fertilizer spreading device for spreading fertilizer, a pesticide spreading device for spreading pesticide, a harvesting device for harvesting, a reaping device for reaping grass and the like, a spreading device for spreading grass and the like, a grass collecting device for collecting grass and the like, a shaping device for shaping grass and the like, and the like.

[0028] The vehicle body 3 has a vehicle body frame 20. As shown in FIG. 1, the vehicle body frame 20 includes a vehicle body frame 20L provided on the left side and a vehicle body frame 20R provided on the right side. The vehicle body frame 20L and the vehicle body frame 20R are each extended forward from the transmission 5 side and support the lower part of the prime mover 4. The vehicle body frame 20L and the vehicle body frame 20R are spaced apart in the vehicle body width direction. The front end of the vehicle body frame 20L and the front end of the vehicle body frame 20R are connected by a front connecting plate 20F. The middle part of the vehicle body frame 20L and the middle part of the vehicle body frame 20R are connected by a middle connecting plate 20M. The vehicle body frame 20L and the vehicle body frame 20R support a front axle case 29. The front axle 15 (see FIG. 6) that rotatably supports the front wheel 7F is housed in the front axle case 29. That is, in this embodiment, the body frame 20 is a front axle frame that supports the front axle 15. Note that the body frame 20 may be a frame that supports a structure other than the front axle case 29 (a frame other than a front axle frame).

[0029] As shown in Figs. 1 to 3, a bonnet 25 is provided above the body frame 20. The bonnet 25 extends in the front-rear direction along the body frame 20. The bonnet 25 is disposed in front of the center of the width direction of the protection device 9. The bonnet 25 has a left side wall 25L provided on the left side, a right side wall 25R provided on the right side, and an upper wall portion 25U connecting the upper portions of the left side wall 25L and the right side wall 25R. An engine room is formed by the left side wall 25L, the right side wall 25R, and the upper wall portion 25U, and the engine room accommodates the prime mover 4, a cooling fan, a radiator, a battery, etc. Front wheels 7F are disposed to the left of the left side wall 25L and to the right of the right side wall 25R, respectively.

[0030] A weight 26 is provided on the front side of the bonnet 25, i.e., on the front sides of the body frames 20L, 20R. The weight 26 is attached to a weight bracket (weight mounting portion) 27 provided at the front part of the body 3. The weight bracket 27 is attached to the front connecting plate 20F of the body frame 20L with fasteners such as bolts. The periphery of the weight 26 is covered with a weight cover 100.

[0031] As shown in FIG. 6, the tractor 1 is equipped with a steering device 11. The steering device 11 has a handle (steering wheel) 11a, a rotating shaft (steering shaft) 11b that rotates with the rotation of the handle 11a, and an assist mechanism (power steering mechanism) 11c that assists the steering of the handle 11a. The assist mechanism 11c includes a hydraulic pump 21, a control valve 22 to which hydraulic oil discharged from the hydraulic pump 21 is supplied, and a steering cylinder 23 that is operated by the control valve 22. The control valve 22 is an electromagnetic valve that operates based on a control signal. The control valve 22 is, for example, a three-position switching valve that can be switched by moving a spool or the like. The control valve 22 can also be switched by steering the steering shaft 11b. The steering cylinder 23 is connected to an arm (knuckle arm) 24 that changes the direction of the front wheels 7F. Therefore, by operating the steering wheel 11a, the switching position and opening degree of the control valve 22 are switched in response to the steering wheel 11a, and the steering cylinder 23 extends or contracts to the left or right in response to the switching position and opening degree of the control valve 22, thereby changing the steering direction of the front wheels 7F. Note that the above-described steering device 11 is an example, and the configuration of the steering device 11 is not limited to the above-described configuration.

[0032] The position detection device and the control device will be described below. As shown in Fig. 1 and Fig. 2, the tractor 1 is equipped with a position detection device 30. The position detection device 30 is mounted on the front of the top plate of the protection device 9 via a mounting body 31. However, the mounting position of the position detection device 30 is not limited to the position shown in the figure, and it may be mounted on the top plate of the protection device 9 or in another location on the vehicle body 3. The position detection device 30 may also be mounted on a working implement such as the above-mentioned tilling implement.

[0033] The position detection device 30 is a device that detects its own position (positioning information including latitude and longitude) by a satellite positioning system. That is, the position detection device 30 receives a signal (position of the positioning satellite, transmission time, correction information, etc.) transmitted from a positioning satellite, and detects its position (latitude, longitude) based on the received signal. The position detection device 30 may detect its own position (latitude, longitude) as a position corrected based on a signal such as a correction from a base station (reference station) that can receive a signal from the positioning satellite. The position detection device 30 may also have an inertial measurement device such as a gyro sensor or an acceleration sensor, and detect the position corrected by the inertial measurement device as its own position. The position detection device 30 can detect the position (traveling position) of the body 3 of the tractor 1.

[0034] The control device and the display device will be described below. As shown in Fig. 6, the tractor 1 is equipped with a control device 40 and a display device 80. The control device 40 is composed of a CPU, an electric circuit, an electronic circuit, etc., and performs various controls of the tractor 1. The display device 80 has a liquid crystal panel, an organic EL panel, etc., and displays various information.

[0035] To the control device 40, a state detection device 41 that detects the driving state, etc., of the tractor 1, and an ignition switch 42 are connected.

[0036] The state detection device 41 is, for example, a device that detects the state of a driving system, and detects the state of, for example, a crank sensor, a cam sensor, an engine rotation sensor, an accelerator sensor, a vehicle speed sensor, a steering angle sensor, a position detection device 30, etc. The state detection device 41 may be a device that detects something other than the state of the driving system, for example, a lift lever detection sensor, a PTO rotation detection sensor, etc.

[0037] The ignition switch 42 is installed around the driver's seat 10 and is a switch that can be operated by the driver. The ignition switch 42 is a switch that can be switched between ON and OFF, and when it is turned ON, the prime mover 4 is driven, and when it is turned OFF, the drive of the prime mover 4 is stopped. Note that the ignition switch 42 may include an accessory switch for supplying power to electrical equipment, and in this case, the ignition switch 42 is switchable between a first ON position for driving the prime mover 4, a second ON position for supplying power to the electrically-operated equipment, and an OFF position.

[0038] Further, the control device 40 is connected with a seating detection device 43. The seating detection device 43 is a device that detects whether or not a person is seated in the driver's seat 10. The seating detection device 43 is a pressure sensor or a vibration sensor installed on the seat, backrest, etc. of the driver's seat 10, a camera installed around the driver's seat 10, etc. When the seating detection device 43 is a pressure sensor or a vibration sensor, it detects a person being seated when it detects a pressure (vibration) equal to or greater than a predetermined value, and detects that a person is not seated when it detects a pressure (vibration) less than a predetermined value. When the seating detection device 43 is a camera, it detects a person being seated when it detects that a person is in the driver's seat 10, and detects that a person is not seated when it detects that a person is not in the driver's seat 10. The seating detection device 43 is an example and is not limited.

[0039] The control device 40 controls the driving system and the work system of the tractor 1. The control device 40 controls, for example, the engine speed, the vehicle speed, the steering angle of the steering device 11, and the like, based on the detection state detected by the state detection device 41. The control device 40 also controls automatic driving based on the detection state detected by the state detection device 41. Specifically, the control device 40 includes an automatic driving control unit 40A. The automatic driving control unit 40A is composed of an electric and electronic circuit provided in the control device 40, a program stored in the control device 40, and the like.

[0040] When performing automatic driving, a driving route (planned driving route) L1 is created using a display device 80 or the like, as shown in Fig. 17. First, the creation of the planned driving route L1 will be described.

[0041] As shown in FIG. 17, when a driver or the like performs a predetermined operation on the display device 80, the display device 80 displays a creation screen M1 for creating a planned travel route L1. For example, when a predetermined field name is input to the field input section 86 of the creation screen M1, the display device 80 displays the field map (field map MP2) input to the field input section 86 on the creation screen M1. In addition, when a driver or the like performs a predetermined operation on the display device 80, a travel route (planned travel route) L1 of the vehicle body 3 can be created on the field map MP2. In creating the planned travel route L1, for example, a straight section L1a indicating straight travel and a turning section L1b indicating a turn can be created as the planned travel route L1 in the field map MP2. The widthwise interval, number, etc. of the straight sections L1a can be set arbitrarily. In other words, the display device 80 can set (create) a planned travel route L1 for performing automatic travel in the field H1. In addition, the planned traveling route L1 created by an external device such as a server may be acquired by the tractor 1 and displayed on the display device 80.

[0042] When the creation of the planned driving route L1 is completed and a command to start automatic driving is issued, the automatic driving control unit 40A executes control of automatic driving (automatic driving control). As shown in Fig. 6, the command to start automatic driving may be issued by a remote control 81 for remote control, or may be issued by a switch 82 installed near the driver's seat of the tractor 1.

[0043] In the automatic driving control, the automatic driving control unit 40A sets the switching position and opening degree of the control valve 22 so that at least the driving position of the vehicle body 3 (position detected by the position detection device 30) coincides with a preset driving route (driving path), i.e., so that the vehicle body 3 coincides with the planned driving route L1. In other words, the control device 40 sets the moving direction and moving amount of the steering cylinder 23 (the steering direction and steering angle of the front wheels 7F) so that the driving position of the tractor 1 coincides with the planned driving route L1.

[0044] In detail, the automatic driving control unit 40A compares the driving position of the vehicle body 3 with the position (planned driving position) indicated by the planned driving route L1, and if the driving position matches the planned driving position, it maintains the steering angle and steering direction (steering angle and steering direction of the front wheels 7F) of the handle 11a in the steering device 11 without changing them (it maintains the opening degree and switching position of the control valve 22 without changing them). If the driving position does not match the planned driving position, the automatic driving control unit 40A changes the steering angle and / or steering direction of the handle 11a in the steering device 11 so that the deviation (deviation amount) between the driving position and the planned driving position becomes zero (it changes the opening degree and / or switching position of the control valve 22).

[0045] In the above embodiment, the automatic driving control unit 40A changes the steering angle of the steering device 11 based on the deviation between the driving position and the planned driving position in the automatic driving control. However, when the orientation of the planned driving route L1 and the orientation (vehicle orientation) of the traveling direction (driving direction) of the tractor 1 (vehicle body 3) are different, the automatic driving control unit 40A may set the steering angle so that the vehicle orientation coincides with the orientation of the planned driving route L1. In addition, the automatic driving control unit 40A may set the final steering angle in the automatic driving control based on the steering angle calculated based on the deviation (position deviation) and the steering angle calculated based on the orientation deviation in the automatic driving control. In addition, the steering angle may be set by a method different from the method of setting the steering angle in the automatic driving control described above.

[0046] In addition, during automatic driving control, the automatic driving control unit 40A may control the rotation speed of the driving device 7, i.e., the front wheels 7F and / or the rear wheels 7R, so that the actual vehicle speed of the tractor 1 (body 3) matches a vehicle speed corresponding to the predetermined planned driving route L1.

[0047] Furthermore, the automatic driving control unit 40A controls automatic driving based on the result of obstacle detection by the obstacle detection device 45. For example, if the obstacle detection device 45 does not detect an obstacle, the automatic driving continues, and if the obstacle detection device 45 detects an obstacle, the automatic driving stops. More specifically, if the obstacle detection device 45 detects an obstacle, the automatic driving control unit 40A stops the automatic driving by stopping the driving of the tractor 1 if the distance between the obstacle and the tractor 1 is equal to or less than a predetermined threshold (stop threshold).

[0048] In addition, the automatic driving control unit 40A continues automatic driving if the seating detection device 43 detects that a person is seated during automatic driving, and stops automatic driving if the seating detection device 43 detects that a person is not seated.

[0049] As shown in FIG. 20, during automatic traveling (automatic traveling), the display device 80 displays a figure G1 indicating the tractor 1 (vehicle body 3) and a planned traveling route L1.

[0050] The obstacle detection device will be described in detail below. As shown in FIG. 1, the tractor 1 is provided with a plurality of obstacle detection devices 45. Each of the plurality of obstacle detection devices 45 is capable of detecting an object present around the tractor 1, i.e., an obstacle. At least one of the plurality of obstacle detection devices 45 is provided in front of the protection device 9 and outside the bonnet 25. That is, at least one of the obstacle detection devices 45 is disposed in an area in front of the protection device 9 of the tractor 1, in an area to the left of the left side wall 25L of the bonnet 25, or in an area to the right of the right side wall 25R of the bonnet 25. In the case of this embodiment, the plurality of obstacle detection devices 45 include an obstacle detection device 45L provided on the left side of the vehicle body 3 (left side of the bonnet 25) and an obstacle detection device 45R provided on the right side of the vehicle body 3 (right side of the bonnet 25).

[0051] Moreover, the obstacle detection device 45 is provided in front of the front wheel 7F and outboard of the front wheel 7F. The obstacle detection device 45L is provided in front of the left front wheel 7F and outboard (to the left) of the left front wheel 7. The obstacle detection device 45R is provided in front of the right front wheel 7F and outboard (to the right) of the right front wheel 7F. In other words, the obstacle detection device 45L is provided to the left front of the left front wheel 7F, and the obstacle detection device 45R is provided to the right front of the right front wheel 7F.

[0052] The obstacle detection device 45 is a laser scanner 45A, a sonar 45B, etc. The laser scanner 45A detects an object (obstacle) by emitting a laser as a detection wave. The laser scanner 45A detects the distance to the obstacle based on the time from emitting the laser to receiving the light. As shown in FIG. 9 and FIG. 10, the laser scanner 45A includes a light projecting and receiving unit 45A1 and a housing 45A2. The light projecting and receiving unit 45A1 emits a laser and receives the laser (reflected light) reflected by the irradiated laser hitting an obstacle. That is, the light projecting and receiving unit 45A1 includes an irradiating unit that emits a laser (detection wave) and a receiving unit that receives the laser (detection wave) reflected by the obstacle. The housing 45A2 is a case that houses and supports the light projecting and receiving unit 45A1. The container 45A2 has an upper body 45A3 arranged above the light emitting / receiving unit 45A1 and a lower body 45A4 arranged below the light emitting / receiving unit 45A1. Between the upper body 45A3 and the lower body 45A4, i.e., around the light emitting / receiving unit 45A1, all or part is open, allowing the laser (detection wave) to pass through.

[0053] The sonar 45B detects an object (obstacle) by emitting sound waves as detection waves. As shown in FIG. 9 and FIG. 10, the sonar 45B includes a sound emitting / receiving unit 45B1 and a housing 45B2. The sound emitting / receiving unit 45B1 emitting sound waves and receiving reflected sound that is generated when the emitting sound waves hit an obstacle. That is, the sound emitting / receiving unit 45B1 includes an emitting unit that emitting sound waves (detection waves) and a receiving unit that receives the sound waves (detection waves) that hit an obstacle and are reflected. The housing 45B2 is a case that houses and supports the sound emitting / receiving unit 45B1. The sonar 45B detects the distance to the obstacle based on the time from emitting sound waves to receiving the reflected sound.

[0054] 1, the laser scanner 45A and the sonar 45B are disposed in front of the front wheel 7F and outboard of the front wheel 7F. More specifically, at least the receiving units (light projecting and receiving unit 45A1 and sound projecting and receiving unit 45B1) of the laser scanner 45A and the sonar 45B are disposed in front of the front wheel 7F and outboard of the front wheel 7F.

[0055] 4, the laser scanner 45A and the sonar 45B are installed below the upper wall portion 25U of the bonnet 25 and at a position lower than the upper end portion of the front wheel 7F. Therefore, the light projecting and receiving unit 45A1 of the laser scanner 45A and the sound projecting and receiving unit 45B1 of the sonar 45B are also installed below the upper wall portion 25U of the bonnet 25 and at a position lower than the upper end portion of the front wheel 7F. In addition, the laser scanner 45A (light projecting and receiving unit 45A1) and the sonar 45B (sound projecting and receiving unit 45B1) are located below the upper end portion of the front wheel 7F and above the front axle 15.

[0056] 1 and 4, the laser scanner 45A is disposed outward of the sonar 45B. Specifically, as shown in Fig. 1, the laser scanner 45A (light emitting / receiving unit 45A1) is disposed outward of an imaginary line X1 that is positioned outward by the width (tread width) W1 of the front wheel 7F from the outer end in the width direction of the front wheel 7F when the front wheel 7F is in a position that causes the vehicle body 3 to move straight (when the steering wheel 11a is not turned). The sonar 45B is disposed inward of the imaginary line X1.

[0057] As shown in Fig. 7, the obstacle detection device 45 is supported on the vehicle body 3 by a support member 50. The support member 50 is capable of changing the position of the obstacle detection device 45 between a detection position (see Figs. 4 and 15) and a retracted position (see Figs. 5 and 16). The support member 50 includes a support member 50L that supports the obstacle detection device 45 on the left side of the vehicle body 3, and a support member 50R that supports the obstacle detection device 45 on the right side of the vehicle body 3. The support members 50L and 50R have the same configuration, except that they are symmetrical across a center line CL1 in the vehicle body width direction.

[0058] The support member 50 extends outward from the vehicle body frame (front axle frame) 20. Specifically, the support member 50L extends leftward from the vehicle body frame 20L. The support member 50R extends rightward from the vehicle body frame 20R.

[0059] As shown in FIGS. 7, 10, 11 and 13, the support member 50 has a first support portion 50A, a second support portion 50B and a third support portion 50C.

[0060] The first support portion 50A has a mounting arm 51, a mounting plate 52, a front support plate 53, and a rear support plate 54. The mounting arm 51 extends forward and outward from the front of the side surface of the body frame 20. The mounting arm 51 includes a mounting arm 51L and a mounting arm 51R. The mounting arm 51L is attached to the front of the left side surface of the body frame 20L and extends from the front toward the left front. The mounting arm 51R is attached to the front of the right side surface of the body frame 20R and extends from the front toward the right front. The mounting plate 52 is attached to the front end of the mounting arms 51L and 51R, with one surface facing outward and the other surface facing inward. The left mounting plate 52 attached to the mounting arm 51L and the right mounting plate 52 attached to the mounting arm 51R are connected by a connecting member 49. The connecting member 49 is made up of a pipe, passes above the weight cover 100 and connects the upper part of the left mounting plate 52 with the upper part of the right mounting plate 52 .

[0061] The front support plate 53 and the rear support plate 54 have the same shape and are arranged parallel to each other and spaced apart in the front-to-rear direction. The front support plate 53 and the rear support plate 54 are attached to one surface of the mounting plate 52 and extend outward. As shown in Fig. 12, a lower support plate 56 abuts against the lower edge of the front support plate 53 and the lower edge of the rear support plate 54. An upper support plate 57 abuts against the upper edge of the front support plate 53 and the upper edge of the rear support plate 54. The lower support plate 56 and the upper support plate 57 are fixed to the mounting plate 52. In Fig. 12, the front support plate 53 is shown by a virtual line.

[0062] As shown in Figs. 10 and 12, the front support plate 53 is formed with a first front hole 53a and a second front hole 53b. The rear support plate 54 is formed with a first rear hole 54a and a second rear hole 54b. The first rear hole 54a is located opposite the first front hole 53a, and the second rear hole 54b is located opposite the second front hole 53b. As shown in Figs. 10, 11, and 12, a cylindrical body 58 and a receiving member 59 are fixed to the upper part of the rear support plate 54. The axis of the central hole of the cylindrical body 58 extends in the front-rear direction. The axis of the central hole of the cylindrical body 58 and the center of the second rear hole 54b are arranged on the same straight line. The receiving member 59 is fixed to the lower part of the front support plate 53 and the lower part of the rear support plate 54. The receiving member 59 is a U-shaped member and has a front portion 59a fixed to the front surface of the front support plate 53, a rear portion 59b fixed to the rear surface of the rear support plate 54, and a lower portion 59c connecting the front portion 59a and the rear portion 59b. A knob bolt 60 is screwed into the lower portion 59c of the receiving member 59. The axis of the threaded shaft of the knob bolt 60 faces the vertical direction. As shown in FIG. 14, a tip member 61 is attached to the threaded shaft of the knob bolt 60. The position (height) of the tip member 61 can be adjusted by rotating the knob bolt 60.

[0063] 10, 11, 12, etc., the second support portion 50B is supported between the front support plate 53 and the rear support plate 54. The second support portion 50B has a first plate 65, an second plate 66, a connecting plate 67, and a support arm 55.

[0064] The one plate 65 and the other plate 66 have the same shape and are arranged parallel to each other with a gap in the front-rear direction. The one plate 65 faces the front support plate 53, and the other plate 66 faces the rear support plate 54. As shown in FIG. 12, the one plate 65 is formed with a first one-side hole 65a, a second one-side hole 65b, and a third one-side hole 65c. As shown in FIG. 12 and FIG. 14, the other plate 66 is formed with a first one-side hole 66a, a second one-side hole 66b, and a third one-side hole 66c. The first one-side hole 66a is located opposite the first one-side hole 65a. The second one-side hole 66b is located opposite the second one-side hole 65b. The third one-side hole 66c is located opposite the third one-side hole 65c. In FIG. 14, the front support plate 53 and the one plate 65 are omitted. The connecting plate 67 is a strip-shaped plate bent into an L-shape, and connects the one plate 65 and the other plate 66 together.

[0065] As shown in Figs. 12 and 14, a cylindrical boss 68 is fitted into the first one-side hole 65a and the first other-side hole 66a. Specifically, the front end side of the boss 68 is fitted into the first one-side hole 65a, and the rear end side of the boss 68 is fitted into the first other-side hole 66a. The center hole 68a of the boss 68 is arranged on the same straight line as the first front hole 53a and the first rear hole 54a, and the screw shaft of the bolt BL1 (see Figs. 13 and 11) is inserted so as to pass through these holes. A nut NT1 is screwed onto the screw shaft of the bolt BL1. The second support portion 50B (the one-side plate 65, the other-side plate 66, and the connecting plate 67) is sandwiched and supported between the front support plate 53 and the rear support plate 54 by the bolt BL1 and the nut NT1. The second support portion 50B is rotatable relative to the first support portion 50A with the screw shaft of the bolt BL1 as a fulcrum. In other words, the threaded shaft of the bolt BL1 functions as a support shaft that rotatably supports the second support portion 50B.

[0066] 14 and 15, a first abutment member 69 and a second abutment member 70 are fixed between the one plate 65 and the other plate 66. The first abutment member 69 and the second abutment member 70 are arranged on the same circle centered on the support shaft (the screw shaft of the bolt BL1). In other words, the first abutment member 69 and the second abutment member 70 are equidistant from the support shaft (the screw shaft of the bolt BL1). The first abutment member 69 and the second abutment member 70 are arranged at positions separated by 90° around the support shaft (the screw shaft of the bolt BL1).

[0067] 10 and 11, the support arm 55 extends from the first support portion 50A toward the outside of the vehicle body. One end of the support arm 55 is connected to a connecting plate 67 together with a backing member 71, which will be described later. The other end of the support arm 55 is connected to the third support portion 50C.

[0068] The third support portion 50C supports the obstacle detection device 45. As shown in FIG. 10, FIG. 11, etc., the third support portion 50C has a support bracket 75 and a support stay 76. The support bracket 75 supports the laser scanner 45A. The support bracket 75 is a substantially C-shaped member composed of an upper horizontal portion 75a, a lower horizontal portion 75b, and a vertical portion 75c. The vertical portion 75c is fixed to the other end of the support arm 55. The upper horizontal portion 75a supports the upper body 45A3 of the housing body 45A2. The lower horizontal portion 75b supports the lower body 45A4 of the housing body 45A2. This allows the laser scanner 45A to be supported by the support bracket 75. The support stay 76 is fixed to the middle portion of the support arm 55 and supports the sonar 45B. The sonar 45B is attached to the support stay 76 so that the sound emitting / receiving portion 45B1 faces forward and toward the inside of the vehicle body.

[0069] The mounting plate 52, the front support plate 53, the rear support plate 54 (see Figs. 10 to 12, etc.) of the first support portion 50A described above constitute a position change mechanism 63 that changes the position of the obstacle detection device 45. The position change mechanism 63 is a mechanism that changes the position of the obstacle detection device 45 between a predetermined detection position where an obstacle is detected and a retracted position where the obstacle detection device 45 is retracted from the detection position toward the vehicle body 3. The position change mechanism 63 can change the position of the obstacle detection device 45 together with the second support portion 50B and the third support portion 50C of the support member 50.

[0070] Figures 4 and 15 show the obstacle detection device 45 in the detection position. Figures 5 and 16 show the obstacle detection device 45 in the retracted position. The position can be changed between the detection position and the retracted position by rotating the second support part 50B with the screw shaft (support shaft) of the bolt BL1 as a fulcrum relative to the first support part 50A.

[0071] 15, when the obstacle detection device 45 is in the detection position, the support arm 55 extends horizontally. Specifically, the support arm 55 of the support member 50L that supports the obstacle detection device 45 on the left side of the vehicle body 3 extends horizontally to the left. The support arm 55 of the support member 50R that supports the obstacle detection device 45 on the right side of the vehicle body 3 extends horizontally to the right. When the obstacle detection device 45 is in the detection position, the irradiation direction of the laser emitted from the light-emitting / receiving unit 45A1 is horizontal.

[0072] When the obstacle detection device 45 is in the detection position, as shown in Fig. 12, the second front hole 53b, the second one-side hole 65b, the second other-side hole 66b, and the second rear hole 54b are arranged on the same straight line, and the pin 64 is inserted so as to penetrate these holes and the cylinder body 58. By inserting the pin 64 into the second front hole 53b, the second one-side hole 65b, the second other-side hole 66b, and the second rear hole 54b, the second support part 50B (the one-side plate 65, the other-side plate 66, the connecting plate 67, and the support arm 55) becomes unable to rotate with respect to the front support plate 53 and the rear support plate 54, and the position of the second support part 50B is fixed. As a result, as shown in Figs. 4, 14, and 15, the support arm 55 is positioned with respect to the vehicle body 3 in a state where it is extended in the horizontal direction (detection posture), and the obstacle detection device 45 is held at the detection position. At this time, the tip member 61 attached to the screw shaft of the knob bolt 60 abuts against the first abutment member 69.

[0073] When the obstacle detection device 45 is moved from the detection position (see FIG. 15) to the retracted position (see FIG. 16), the pin 64 is first pulled out from the hole. The pin 64 can be pulled out by gripping the annular gripping portion 64a provided at one end of the pin 64. By pulling the pin 64 out of the hole, the second support portion 50B (the one plate 65, the other plate 66, the connecting plate 67, and the support arm 55) becomes rotatable relative to the front support plate 53 and the rear support plate 54. At this time, since the tip member 61 is in contact with the first contact member 69, the second support portion 50B cannot rotate downward and can only rotate upward.

[0074] When an upward force is applied to the support arm 55 after the pin 64 is pulled out of the hole, the second support part 50B (one plate 65, the other plate 66, the connecting plate 67, and the support arm 55) rotates upward around the support shaft (the screw shaft of the bolt BL1) as a fulcrum (see arrow U1 in FIG. 15). The upward rotation range of the support arm 55 is regulated by a backing member 71 and a protruding shaft 72 (see FIGS. 12 and 14). The backing member 71 is fixed to the upper part of the support arm 55. The protruding shaft 72 protrudes outward from a shaft support 73 arranged on the upper part of the upper support plate 57.

[0075] As shown in FIG. 16, the support arm 55 can be rotated upward until the contact member 71 abuts against the protruding shaft 72. When the contact member 71 abuts against the protruding shaft 72, the support arm 55 is in a state of extending upward (retracted posture). In the state shown in FIG. 16, the second front hole 53b, the second rear hole 54b, the third one-side hole 65c, and the third other-side hole 66c are arranged on the same straight line, so that by inserting the pin 64 so as to penetrate these holes and the cylindrical body 58, the second support part 50B (the one-side plate 65, the other-side plate 66, the connecting plate 67, and the support arm 55) becomes unable to rotate with respect to the front support plate 53 and the rear support plate 54, and the position of the second support part 50B is fixed. As a result, as shown in FIG. 16 and FIG. 5, the support arm 55 is positioned with respect to the vehicle body 3 in a state of extending upward, and the obstacle detection device 45 is held in the retracted position. At this time, the tip member 61 attached to the screw shaft of the knob bolt 60 comes into contact with the second contact member 70.

[0076] As described above, the position change mechanism 63 can change the position of the obstacle detection device 45 between the detection position and the retracted position. By setting the obstacle detection device 45 at the detection position, it is possible to detect obstacles around the vehicle body 3. When the obstacle detection device 45 is not in use, the obstacle detection device 45 is moved from the detection position to the retracted position.

[0077] The position changing mechanism 63 has a posture detection device that detects whether the support arm 55 is in the detection position or the retracted position. For example, the posture detection device used is one that detects the retracted position when the contact member 71 abuts against the protruding shaft 72, and detects the detection position when the contact member 71 moves away from the protruding shaft 72. Detection information from the posture detection device is input to the control device 40.

[0078] The valid mode and the invalid mode will be described below. In the automatic travel of the tractor 1, when the obstacle detection device 45 detects an obstacle, the automatic travel control unit 40A stops the vehicle body 3 based on the detection information related to the obstacle detected by the obstacle detection device. During automatic travel in the field H1, it is possible to switch between an effective mode in which the vehicle body 3 is stopped based on the detection information, and an invalid mode in which the vehicle body 3 is not stopped.

[0079] In the valid mode, when the obstacle detection device 45 detects an obstacle during automatic traveling, and the detected detection information indicates that the distance between the obstacle and the vehicle body 3 is equal to or less than a predetermined distance, the vehicle body 3 is stopped. On the other hand, in the invalid mode, even if the obstacle detection device 45 detects an obstacle during automatic traveling, and the detected detection information indicates that the distance between the obstacle and the vehicle body 3 is equal to or less than the stop threshold, the vehicle body 3 is not stopped and the automatic traveling continues. Alternatively, in the invalid mode, even if the obstacle detection device 45 detects an obstacle during automatic traveling, the obstacle detection device 45 does not output the fact that the obstacle has been detected (detection information) to the automatic traveling control unit 40A, thereby preventing the automatic traveling control unit 40A from stopping the vehicle body 3 during automatic traveling. Also, in the invalid mode, the obstacle detection device 45 stops detecting the obstacle during automatic traveling, thereby preventing the vehicle body 3 from being stopped during automatic traveling. In other words, in the invalid mode, the vehicle body 3 is not stopped based on the detection information of the obstacle detection device 45 during automatic traveling in the field H1, regardless of whether an obstacle is detected or not.

[0080] The control device 40 includes a mode switching unit 40B. The mode switching unit 40B is composed of an electric / electronic circuit provided in the control device 40, a program stored in the control device 40, and the like. As shown in FIG. 18, when the driver performs a predetermined operation on the display device 80, the mode switching unit 40B displays a setting screen M2. The setting screen M2 displays a first selection unit 101 for selecting an effective mode and a second selection unit 102 for selecting an ineffective mode. Selection between the first selection unit 101 and the second selection unit 102 can be performed by an operation member provided on the display device 80 or an operation member provided around the driver's seat 10. The mode switching unit 40B switches to the effective mode when the first selection unit 101 is selected, and switches to the ineffective mode when the second selection unit 102 is selected.

[0081] More specifically, when the ignition switch 42 is OFF or when the ignition switch 42 is switched from OFF to ON, the mode switching unit 40B sets the valid mode as a default, and in the default state (initial state), the display device 80 displays a state in which the first selection unit 101 is selected on the setting screen M2. That is, when the driving of the prime mover 4 is stopped, or when the driving of the prime mover 4 is stopped and then switched to starting, the mode switching unit 40B sets the valid mode as a default.

[0082] On the other hand, in the case where the valid mode is switched to the invalid mode on the setting screen M2 after the prime mover 4 is driven, when the drive of the prime mover 4 stops, the mode switching unit 40B switches from the invalid mode to the valid mode. In other words, the mode switching unit 40B switches to the valid mode when the ignition switch 42 is switched from ON to OFF while the invalid mode is maintained.

[0083] In the above-described embodiment, the mode switching unit 40B switches between the valid mode and the invalid mode in response to the operation of the setting screen M2 displayed on the display device 80, but the mode switching may be inhibited.

[0084] The control device 40 is equipped with a switching inhibition unit 40C. The switching inhibition unit 40C is composed of an electric / electronic circuit provided in the control device 40, a program stored in the control device 40, and the like. When the obstacle detection device 45 is in the retracted position, the switching inhibition unit 40C allows the mode switching unit 40B to switch from the effective mode to the ineffective mode. For example, when the setting screen M2 is displayed on the display device 80 and the obstacle detection device 45 is in the retracted position, the switching inhibition unit 40C allows (permits) the mode switching unit 40B to switch from the effective mode to the ineffective mode by selecting the second selection unit 102.

[0085] On the other hand, when the setting screen M2 is displayed on the display device 80 and the obstacle detection device 45 is in the detection position, the switching inhibition unit 40C does not allow the mode switching unit 40B to switch from the enabled mode to the disabled mode by selecting the second selection unit 102. In other words, when the obstacle detection device 45 is in the retracted position, the switching inhibition unit 40C does not allow the mode switching unit 40B to accept the selection of the second selection unit 102.

[0086] In the above-described embodiment, when the obstacle detection device 45 is in the detection position, the switching control unit 40C is not allowed to switch from the enabled mode to the disabled mode, but instead, the enabled mode / disabled mode may be controlled based on whether the driver is seated or not.

[0087] Specifically, the control device 40 includes a switching control unit 40D. The switching control unit 40D is configured with an electric / electronic circuit provided in the control device 40, a program stored in the control device 40, and the like.

[0088] The switching inhibition unit 40D allows the mode switching unit 40B to switch from the valid mode to the invalid mode when the seating detection device 43 detects that the driver is seated. For example, when the setting screen M2 is displayed on the display device 80 and the driver is seated, the switching inhibition unit 40D allows (permits) the mode switching unit 40B to switch from the valid mode to the invalid mode by selecting the second selection unit 102.

[0089] On the other hand, when the setting screen M2 is displayed on the display device 80, if the seating detection device 43 detects that the driver is not seated, the switching inhibition unit 40D does not allow the mode switching unit 40B to switch from the valid mode to the invalid mode by selecting the second selection unit 102. In other words, when the driver is not seated in the driver's seat 10, the switching inhibition unit 40D does not allow the mode switching unit 40B to accept the selection of the second selection unit 102.

[0090] Hereinafter, a first embodiment of the automatic driving flow will be described. Fig. 19A shows the operation flow of automatic driving. Fig. 19A will be described on the assumption that automatic driving is not performed immediately after the ignition switch 42 is turned on. Fig. 19A shows the operation flow of automatic driving in the disabled mode.

[0091] As shown in FIG. 19A, the mode switching unit 40B judges whether the ignition switch 42 is ON (S1). For example, when the ignition switch 42 is ON (the prime mover 4 is being driven or power is being supplied to the electrical equipment) (S1, Yes), the mode switching unit 40B sets the mode to the effective mode (S2). When a predetermined operation is performed, the display device 80 displays the setting screen M2 (S3). The switching inhibition unit 40C judges whether the obstacle detection device 45 is in the retracted position (S4). When the obstacle detection device 45 is in the retracted position (S4, Yes), the switching inhibition unit 40C allows the mode switching unit 40B to switch from the effective mode to the ineffective mode on the setting screen M2, and accepts the ineffective mode (S5).

[0092] On the other hand, when the obstacle detection device 45 is not in the evacuation position (S4, No), the switching restraint unit 40C does not allow the mode switching unit 40B to switch from the enabled mode to the disabled mode in the setting screen M2, and does not accept the disabled mode (S6). In addition, when the obstacle detection device 45 is not in the evacuation position (S4, No), the automatic driving control unit 40A outputs an abnormality (warning) to the display device 80, and the display device 80 displays an abnormality (warning) on ​​the setting screen M2 or the like indicating that it is not in the evacuation position (S7).

[0093] After accepting the disabled mode (S5 and after), the automatic driving control unit 40A waits for a command to start automatic driving, and when a start button on the remote control 81, switch 82, etc. is pressed and a start command is obtained (S8), the automatic driving control unit 40A determines whether or not the driver is seated in the driver's seat (S9). If the driver is seated in the driver's seat 10 (S9, Yes), the automatic driving control unit 40A executes automatic driving control, that is, starts automatic driving in the disabled mode (S10).

[0094] When automatic traveling is started in the disabled mode, the automatic traveling control unit 40A does not stop the vehicle body 3 due to the detection of an obstacle, regardless of the detection information of the obstacle detection device 45. Also, as shown in Fig. 20, when automatic traveling is performed in the disabled mode, the display device 80 displays in the message unit 88 that automatic traveling is currently in the disabled mode. Note that the display device 80 may also display in the message unit 88 that automatic traveling is currently in the enabled mode.

[0095] On the other hand, when the driver is not seated in the driver's seat (S9, No), the automatic driving control unit 40A outputs an abnormality (warning) to the display device 80, and the display device 80 displays an abnormality (warning) indicating that the driver is not seated (S11). Also, the automatic driving control unit 40A prohibits automatic driving before the start of automatic driving and when the driver is not seated (when the process moves from S8 to S9, No), while stopping the traveling of the vehicle body 3 during automatic driving and when the driver is not seated (when the process moves from S10 to S9, No) (S12). The automatic driving control unit 40A continues automatic driving when the driver is seated during automatic driving after the start of automatic driving (when the process moves from S10 to S9, Yes).

[0096] A second embodiment of the automatic driving flow will be described below. Fig. 19B shows an automatic driving operation flow different from Fig. 19A. Fig. 19B will also be described on the assumption that automatic driving is not performed immediately after the ignition switch 42 is turned ON. Fig. 19B shows the automatic driving operation flow in the disabled mode.

[0097] As shown in FIG. 19B, the mode switching unit 40B judges whether the ignition switch 42 is ON (S1). For example, when the ignition switch 42 is ON (the prime mover 4 is being driven or power is being supplied to the electrical equipment) (S1, Yes), the mode switching unit 40B sets the mode to the valid mode (S2). When a predetermined operation is performed, the display device 80 displays the setting screen M2 (S3). The switching inhibition unit 40D judges whether the driver is seated in the driver's seat (S20). When the driver is seated in the driver's seat (S20, Yes), the switching inhibition unit 40D allows the mode switching unit 40B to switch from the valid mode to the invalid mode on the setting screen M2 and accepts the invalid mode (S21).

[0098] On the other hand, when the driver is not seated in the driver's seat (S20, No), the switching inhibition unit 40D does not allow the mode switching unit 40B to switch from the valid mode to the invalid mode in the setting screen M2, and does not accept the invalid mode (S22). In addition, when the driver is not seated in the driver's seat (S20, No), the automatic driving control unit 40A outputs an abnormality (warning) to the display device 80, and the display device 80 displays an abnormality (warning) indicating that the driver is not seated on the setting screen M2 or the like (S23). S8 to S12 in FIG. 19B are the same as those in FIG. 19A, and therefore the explanation will be omitted.

[0099] In the above-described embodiment, switching from the enabled mode to the disabled mode was permitted when the obstacle detection device 45 was in the retracted position or when the driver was seated in the driver's seat. However, switching from the enabled mode to the disabled mode may also be permitted when the obstacle detection device 45 is in the retracted position and the driver is seated in the driver's seat.

[0100] A third example of the automatic driving flow will be described below. In the above embodiment, the switching from the effective mode to the ineffective mode was restrained based on the position (detection position, retreat position) of the obstacle detection device 45 or the state of the driver's seat (seated, not seated), but the effective mode may be switched to the ineffective mode regardless of the position of the obstacle detection device 45 and the state of the driver's seat. In addition, whether or not automatic driving can be started may be set based on the position of the obstacle detection device 45. For example, before automatic driving, when in the ineffective mode, the automatic driving control unit 40A can start automatic driving when the obstacle detection device 45 is in the retreat position, and when in the ineffective mode, when the obstacle detection device 45 is not in the retreat position, does not start automatic driving in the ineffective mode.

[0101] Fig. 19C shows an operation flow of automatic driving different from Fig. 19A and Fig. 19B. Fig. 19C will also be described on the assumption that automatic driving is not performed immediately after the ignition switch 42 is turned ON. Fig. 19C shows an operation flow of automatic driving in the disabled mode.

[0102] 19C, mode switching unit 40B judges whether ignition switch 42 is ON or not (S1). For example, if ignition switch 42 is ON (prime mover 4 is being driven or power is being supplied to electrical equipment) (S1, Yes), mode switching unit 40B sets the valid mode (S2). When a predetermined operation is performed, display device 80 displays setting screen M2 (S3).

[0103] In the setting screen M2, regardless of the position of the obstacle detection device 45 and the state of the driver's seat, it is possible to switch between the enabled mode and the disabled mode, that is, the enabled mode and the disabled mode can be accepted. When the disabled mode is set in the setting screen M2 (S50), the automatic driving control unit 40A judges whether the obstacle detection device 45 is in the evacuation position (S51). When the obstacle detection device 45 is not in the evacuation position (S51, No), the automatic driving control unit 40A outputs an abnormality (warning) to the display device 80, and the display device 80 displays an abnormality (warning) indicating that the obstacle detection device 45 is not in the evacuation position on the setting screen M2 or the like (S52). S8 to S12 in FIG. 19C are the same as those in FIG. 19A and FIG. 19B, and therefore the explanation will be omitted.

[0104] In addition, in the above-mentioned Figures 19A to 19C, during automatic driving in the disabled mode (during automatic driving), the automatic driving control unit 40A continues automatic driving if the vehicle is in the evacuation position, but stops automatic driving if the vehicle changes from the evacuation position to the detection position.

[0105] The automatic traveling in the valid mode will be described below. The automatic traveling in the invalid mode has been described with reference to Figs. 19A to 19C above, but the automatic traveling in the valid mode is as follows.

[0106] When the automatic driving control unit 40A is set to the valid mode, the automatic driving control unit 40A judges whether the obstacle detection device 45 is at the detection position. When the obstacle detection device 45 is at the detection position and the start of automatic driving is acquired, the automatic driving control unit 40A starts automatic driving. In automatic driving in the valid mode, the automatic driving control unit 40A may start automatic driving when three conditions are met: the obstacle detection device 45 is at the detection position, the start of automatic driving is acquired, and the driver is seated. In addition, when the valid mode is set before the start of automatic driving, if the obstacle detection device 45 is at the evacuation position, the display device 80 may display an abnormality (warning) that the obstacle detection device 45 is at the evacuation position.

[0107] The agricultural machine 1 includes a vehicle body 3 capable of traveling, an obstacle detection device 45 capable of detecting an obstacle, an automatic traveling control unit 40A that executes automatic traveling of the vehicle body 3 and stops the vehicle body 3 based on detection information related to an obstacle detected by the obstacle detection device 45 during the automatic traveling, and a mode switching unit 40B that switches between an effective mode in which the vehicle body 3 is stopped based on detection information during automatic traveling in a field and an ineffective mode in which the vehicle body 3 is not stopped. According to this, since the agricultural machine 1 includes the mode switching unit 40B, during automatic traveling in a field, in the effective mode, the vehicle body 3 can be stopped based on detection information detected by the obstacle detection device 45, while in the ineffective mode, automatic traveling can be performed without stopping the vehicle body 3 regardless of the detection information of the obstacle detection device 45. In other words, on the premise of automatic traveling in a field, it is possible to stop detection of an obstacle for stopping the vehicle body 3, or not stop the vehicle body 3 due to the detection of an obstacle even if the obstacle is detected. In other words, it is possible to change whether or not to stop automatic driving depending on the situation.

[0108] The agricultural machine 1 includes a support member 50 to which an obstacle detection device 45 is attached and which can change the position of the obstacle detection device 45 between a detection position and a retracted position, and the automatic travel control unit 40A can start automatic travel when in the disabled mode and the obstacle detection device is in the retracted position. With this, when the obstacle detection device 45 is in the retracted position, where it is physically unable to detect obstacles, automatic travel can be performed regardless of whether an obstacle is detected or not.

[0109] The agricultural machine 1 includes a seating detection device 43 that detects whether or not a driver is seated in the driver's seat 10, and the automatic driving control unit 40A can start automatic driving when the seating detection device 43 detects that a driver is seated. With this, during automatic driving with a person present, automatic driving can be performed on the condition that the driver is seated in the driver's seat 10, regardless of whether an obstacle is detected.

[0110] The agricultural machine 1 includes a support member 50 to which an obstacle detection device 45 is attached and which can change the position of the obstacle detection device 45 between a detection position and a retracted position, and a switching inhibition unit 40C which allows the mode switching unit 40B to switch from the effective mode to the ineffective mode when the obstacle detection device 45 is in the retracted position and does not allow the mode switching from the effective mode to the ineffective mode when the obstacle detection device 45 is in the detection position. With this, switching from the effective mode to the ineffective mode can be performed only when the obstacle detection device 45 is in the retracted position and in a state where an obstacle cannot be detected (a state where the obstacle detection device 45 is not physically in the detection position). In other words, when the driver intentionally moves the obstacle detection device 45 to the retracted position, the ineffective mode can be set, thereby avoiding a situation contrary to the driver's intention.

[0111] The agricultural machine 1 is equipped with a seating detection device 43 that detects whether or not a person is seated in the driver's seat, and a switching inhibition unit 40D that allows the mode switching unit 40B to switch from the valid mode to the invalid mode when the seating detection device 43 detects that a person is seated, and does not allow the mode switching from the valid mode to the invalid mode when the seating detection device 43 detects that a person is not seated. With this, only when the driver is seated and automatic driving is being performed with a person present, automatic driving can be performed without stopping the vehicle body 3 regardless of the detection information of the obstacle detection device 45.

[0112] The agricultural machine 1 is equipped with a seating detection device 43 that detects whether or not a person is seated in the driver's seat, and the automatic driving control unit 40A continues automatic driving when the seating detection device 43 detects that a person is seated during automatic driving, and stops automatic driving when the seating detection device 43 detects that a person is not seated. According to this, during automatic driving with a person present, automatic driving can be automatically stopped when the driver leaves the driver's seat 10, and the accuracy of automatic driving with a person present can be improved.

[0113] The agricultural machine 1 includes a support member 50 to which an obstacle detection device 45 is attached and which can change the position of the obstacle detection device 45 between a detection position and a retracted position, and the automatic travel control unit 40A continues automatic travel when the obstacle detection device 45 is in the retracted position during automatic travel in the disabled mode, and stops automatic travel when the obstacle detection device 45 changes from the retracted position to the detection position. This makes it possible to stop automatic travel if the obstacle detection device 45 changes from the retracted position to the detection position for some reason during automatic travel in the disabled mode, and to prevent the obstacle detection device 45 from traveling while hitting structures (water supply and drainage facilities), crops, etc. in the field during automatic travel in the disabled mode.

[0114] The agricultural machine 1 includes a prime mover 4 and an ignition switch 42 that switches the drive of the prime mover 4 between ON and OFF, and the mode switching unit 40B sets the effective mode as a default when the ignition switch 42 is switched from OFF to ON, and switches to the effective mode when the ignition switch 42 is switched from ON to OFF in the ineffective mode. This makes it possible to reliably start from the effective mode when the ignition switch 42 is switched from OFF to ON to drive the prime mover 4, or when the ignition switch 42 is switched from ON to OFF to stop the drive of the prime mover 4.

[0115] The agricultural machine 1 is provided with a display device 80 that displays whether the mode is the valid mode or the invalid mode. This allows the driver to reliably know whether the automatic traveling is in the valid mode or the invalid mode.

[0116] When the automatic traveling control unit 40A acquires, as detection information in the valid mode, that the obstacle detection device 45 has detected an obstacle, it stops the vehicle body 3. This makes it possible to reliably stop the vehicle body 3 if an obstacle is detected during automatic traveling in the valid mode.

[0117] When the obstacle detection device 45 is in the disabled mode, even if an obstacle is detected, the obstacle detection device 45 does not output the detection of the obstacle to the automatic driving control unit 40A. By not outputting the detection of the obstacle to the automatic driving control unit 40A, the automatic driving control unit 40A can reliably prevent the vehicle body 3 from being stopped due to the detection of an obstacle.

[0118] In the disabled mode, even if the obstacle detection device 45 detects an obstacle during automatic driving, the obstacle detection device 45 may not output the detection of the obstacle (detection information) to the automatic driving control unit 40A, but may output the detection information to a control device 40 other than the automatic driving control unit 40A and store the detection information in the control device 40. In such a case, the detection of the obstacle is not used to stop the vehicle body 3, but it is possible to know what has been detected as an obstacle by analyzing the detection information. In addition, the state of the field can be known by associating the detection information with the position (driving position) of the vehicle body.

[0119] Although the embodiment of the present invention has been described above, the embodiment disclosed herein should be considered as illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0120] 1: Agricultural machinery (tractors) 3: Body 4: Prime mover 10: Driver's seat 40A: Automatic driving control unit 40B: Mode switching section 40C: Switching check section 40D: Switching check section 42: Ignition switch 43: Seat detection device 45: Obstacle detection device 50: Support member 80:Display device H1: Field

Claims

1. A drivable vehicle body; An obstacle detection device capable of detecting an obstacle; an automatic driving control unit that executes automatic driving of the vehicle body and stops the driving of the vehicle body based on detection information related to an obstacle detected by the obstacle detection device during the automatic driving; a mode switching unit that switches the automatic driving control unit between an effective mode in which the vehicle body can be stopped from traveling based on the detection information and an ineffective mode in which the vehicle body is not stopped from traveling based on the detection information during the automatic driving; Agricultural machinery equipped with

2. a support member to which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position at which the obstacle can be detected and a retreat position at which the obstacle cannot be detected; The agricultural machine according to claim 1 , wherein the automatic travel control unit is capable of executing the automatic travel when the automatic travel control unit is in the disabled mode and the obstacle detection device is in the retracted position.

3. A seating detection device is provided to detect a seating position in the driver's seat, The agricultural machine according to claim 2 , wherein the automatic driving control unit is capable of executing the automatic driving when the seating detection device detects that a person is seated.

4. a support member to which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position at which the obstacle can be detected and a retreat position at which the obstacle cannot be detected; a switching inhibition unit that allows the mode switching unit to switch from the enabled mode to the disabled mode when the obstacle detection device is in the retracted position and does not allow the mode switching unit to switch from the enabled mode to the disabled mode when the obstacle detection device is in the detection position; 2. The agricultural machine according to claim 1, further comprising:

5. A seating detection device for detecting whether or not a driver is seated in the driver's seat; a switching inhibition unit that allows the mode switching unit to switch from the valid mode to the invalid mode when the seating detection device detects that a person is seated, and does not allow the mode switching from the valid mode to the invalid mode when the seating detection device detects that a person is not seated; 5. The agricultural machine according to claim 1 or 4, further comprising:

6. A seating detection device is provided to detect whether or not the driver is seated in the driver's seat, The agricultural machine according to any one of claims 1 to 5, wherein the automatic driving control unit continues the automatic driving when the seating detection device detects that a person is seated during the automatic driving, and stops the automatic driving when the seating detection device detects that a person is not seated.

7. a support member to which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position at which the obstacle can be detected and a retreat position at which the obstacle cannot be detected; The agricultural machine according to any one of claims 1 to 6, wherein the automatic driving control unit continues the automatic driving when the obstacle detection device is in the retracted position during the automatic driving in the disabled mode, and stops the automatic driving when the obstacle detection device changes position from the retracted position to the detection position.

8. The prime mover, an ignition switch for switching the drive of the prime mover between ON and OFF; Equipped with 8. The agricultural machine according to claim 1, wherein the mode switching unit sets the effective mode as a default when the ignition switch is switched from OFF to ON, and switches to the effective mode when the ignition switch is switched from ON to OFF in the ineffective mode.

9. The agricultural machine according to any one of claims 1 to 8, further comprising a display device that displays whether the mode is the valid mode or the invalid mode.

10. The agricultural machine according to any one of claims 1 to 9, wherein the automatic driving control unit stops the vehicle body when the automatic driving control unit acquires, as the detection information when the automatic driving control unit is in the effective mode, that the obstacle detection device has detected an obstacle.

11. The agricultural machine according to any one of claims 1 to 10, wherein the obstacle detection device does not output to the automatic driving control unit, even if the obstacle is detected, when the obstacle detection device is in the disabled mode.

12. The agricultural machine according to any one of claims 1 to 11, wherein the obstacle detection device notifies the automatic driving control unit of the detection of the obstacle during the automatic driving when the automatic driving control unit is in the enabled mode, and does not notify the automatic driving control unit of the detection of the obstacle when the automatic driving control unit is in the disabled mode.

13. a support member to which the obstacle detection device is attached, the support member being capable of changing the position of the obstacle detection device between a detection position at which the obstacle can be detected and a retreat position at which the obstacle cannot be detected; 2. The agricultural machine according to claim 1, wherein the automatic traveling control unit is capable of starting the automatic traveling when the automatic traveling control unit is in the effective mode and the obstacle detection device is at the detection position, is capable of stopping the automatic traveling when the automatic traveling control unit is in the effective mode and the obstacle detection device is at the retracted position, is capable of stopping the automatic traveling when the automatic traveling control unit is in the disabled mode and the obstacle detection device is at the detection position, and is capable of starting the automatic traveling when the automatic traveling control unit is in the disabled mode and the obstacle detection device is at the retracted position.

14. A seating detection device is provided to detect a seating position in the driver's seat, The agricultural machine according to claim 13, wherein the automatic driving control unit is capable of executing the automatic driving when the seating detection device detects that a person is seated.

15. An agricultural machine as described in claim 13, further comprising a switching restraint unit that allows the mode switching unit to switch from the enabled mode to the disabled mode when the obstacle detection device is in the retracted position, and does not allow the mode switching unit to switch from the enabled mode to the disabled mode when the obstacle detection device is in the detection position.

Images