JP4171431B2 - Tractor - Google Patents

Description

The present invention relates to a tractor provided with a monitor unit that is also used as a control condition display and setting tool.

  In recent years, working vehicles that automatically control the attitude of a work implement according to set control conditions have become widespread. This type of work vehicle is equipped with setting tools to set the control conditions, but if there are many control conditions that can be set, many setting tools are required, so the number of parts only increases. In addition, there is a problem that the control condition setting operation becomes complicated.

In view of this, there has been proposed a work vehicle including a monitor that displays control conditions and a setting operation unit that sets the control conditions by operating the screen (see, for example, Patent Document 1). According to the work vehicle configured as described above, since various control conditions can be set by operating the monitor screen with the setting operation unit, the number of setting tools can be reduced.
JP 2002-307978 A

By the way, some working vehicles use the same control function for a plurality of types of work machines. When this is a tractor, automatic height control, automatic tilt control, etc. are also used for a plurality of types of work machines. However, in the technique disclosed in Patent Document 1, setting items related to various control functions are displayed in a list, and the setting items are selected here to change the settings. When the present invention is applied to a working vehicle that is also used as a type of work machine, it is necessary to reset control conditions every time the work machine is changed, and there is a problem that the setting operation takes time.

The present invention, which was created for the purpose of solving these problems in view of the such circumstances described above, an operation unit driver's seat is provided, various selectively engageable three points the working machine In a tractor including a link mechanism and a control unit that controls the postures of the various working machines under set control conditions, the operation unit is provided with a monitor unit that is also used as a display and setting tool for the control conditions. In addition, the monitor unit setting screen is configured independently for each type of work implement, and the monitor display of the monitor unit is configured so that the control conditions set on the various work implement setting screens can be stored. Is a work machine selection screen for selecting the type of work machine on the monitor initial screen, and a control condition setting screen for displaying only the setting items related to the selected work machine is displayed below the work machine selection screen. Set When various set control conditions are changed, the memory for storing the changes is set so that a storage area is secured for each work machine type and the control conditions for each work machine are stored independently. It is the tractor characterized by having .
With this configuration, control conditions suitable for each work machine can be stored individually. Therefore, when a work machine is replaced, only the work machine selection operation or the stored data read operation is suitable for that work machine. It is possible to apply different control conditions. Accordingly, the setting operation can be greatly simplified as compared with the conventional configuration in which the setting is performed again every time the work machine is replaced.
In addition, as a monitor unit that is also used as a display tool and a setting tool for control conditions, a monitor having a touch panel on the display screen, a monitor having an operation tool for screen operation in the vicinity of the display screen, a touch panel on the display screen, and In addition, a monitor including an operation tool for screen operation in the vicinity of the display screen is included.

  Next, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a traveling machine body of a crawler tractor. The traveling machine body 1 includes a power unit 2 on which an engine or the like (not shown) is mounted, a crawler type traveling unit 3, and a working machine such as a rotary, a plow, and a harrow Is configured to include a work machine connection portion 4 that can be selectively connected to each other and an operation portion 6 that is covered with a cabin 5.

  The work machine connecting portion 4 includes a three-point link mechanism, a lift arm that suspends the three-point link mechanism via a pair of left and right lift rods, a lift cylinder that moves the lift arm up and down, and a left or right lift rod The working machine connected to the three-point link mechanism is lifted and lowered according to the hydraulic action of the lift cylinder and tilted in the left and right direction according to the hydraulic action of the lift rod cylinder. It is configured as follows.

  The traveling machine body 1 is provided with a control unit 7 configured using a microcomputer (including a CPU, a RAM, a ROM, an EEPROM, and the like). The control unit 7 includes a monitor unit (monitor unit) 8 to be described later, a tilt switch 10 provided on the main transmission lever 9, an engine rotation sensor 11 for detecting engine rotation, a lift arm sensor 12 for detecting a lift arm angle, and a lift rod. A lift rod sensor 13 for detecting the cylinder length, a position sensor 15 for detecting a lever position of a position lever (work machine lifting / lowering operation lever) 14, a draft sensor 16 for detecting a traction load such as a plow, and the traveling machine body 1 (or work machine). A tilt sensor 17 for detecting the right / left tilt of the slab, a rotary sensor, etc., and a plowing depth sensor 18 for detecting the working depth, a leveling work machine, etc., and a laser projected from a laser projector (not shown). Laser receiver 19 for detecting the working height with reference to light, electromagnetic valve 20 for lift cylinder, lift Connected like Ddoshirinda electromagnetic valve 21, the various control functions, and is configured to perform operation control of the lift cylinder and the lift rod cylinder.

  The control function provided in the control unit 7 of the present embodiment includes position control for automatically raising and lowering the work implement according to the position of the position lever 14, and automatically the work implement according to the detection depth of the tilling depth sensor 18. Automatic depth control for raising and lowering control, automatic inclination control for automatically controlling the working machine according to the detected inclination of the inclination sensor 17, and automatic draft control for automatically raising and lowering the working machine according to the detection load of the draft sensor 16. Control, S mode control for automatically raising / lowering the work implement according to the detected rotation of the engine rotation sensor 11, laser control for automatically raising / lowering the work implement according to the light reception signal of the laser receiver 19, The control condition of each control function is displayed and set by the monitor unit 8, for example, raising regulation control for regulating the maximum height.

  The operation unit 6 includes a driver's seat 22 where an operator is seated facing forward, a steering wheel 23 that controls the traveling direction, a meter panel 24 that displays traveling speed, a main transmission lever 9 that controls traveling speed, A position lever 14 for setting the height, a hydraulic operation lever 25 for controlling the external hydraulic equipment, a display unit for control conditions, a monitor unit 8 that also serves as a setting tool, and the like are arranged.

  The cabin 5 that covers the operation unit 6 includes a front part 5a including a windshield, a side part 5b including a door and a side glass, a rear part 5c including a rear glass, and a top part 5d including a roof panel. Yes. The front side (door part) of the side part 5 b rises from the position of the boarding / alighting step 26 to form the entrance / exit, while the rear side (side glass part) of the side part 5 b rises from the upper end position of the rear fender 27.

  In the operation unit 6, the steering wheel 23 and the meter panel 24 are disposed in front of the driver seat 22, and the main transmission lever 9, the position lever 14, and the hydraulic operation lever 25 are disposed in front of the driver seat 22 on the right side. Furthermore, the monitor unit 8 which is a main part of the present invention is disposed in the vicinity of the right side of the driver seat 22. That is, when the monitor unit 8 that is also used as a control condition display tool and a setting tool is arranged in this way, not only the setting operation is facilitated, but also the operation of the monitor unit 8 is reduced. Even when the control condition changing operation is performed while observing the working machine behind the machine body in a half body posture while sitting on the seat 22, it is possible to ensure good visibility and operability of the monitor unit 8.

  In the present embodiment, the monitor unit 8 is disposed behind the various operation levers 9, 14, 25 and in the vicinity of the rear fender 27. The operability can be further improved. Moreover, although the monitor unit 8 of the present embodiment is arranged so that the outer end is along the upper end of the rear fender 27, the upper surface for performing display and operation is inclined so as to become lower toward the driver's seat 22 side, Not only the visibility from the driver's seat 22 side is improved, but a natural operation feeling can be obtained by placing a hand on the upper surface of the monitor unit 8 without difficulty.

  The monitor unit 8 includes a monitor 30 composed of a liquid crystal display panel with a touch panel, four selection switches 31 to 34 for selecting selection items displayed on the monitor screen, and a cursor displayed on the monitor screen up, down, left and right. Four cursor movement switches 35 to 38 for moving, a determination switch 39 for performing a determination operation, and a first setting operation dial 40 (used for depth setting operation, draft setting operation, automatic on / off operation, etc.) Rotary encoder with switch), second setting operation dial 41 (rotary encoder with switch) that is used for tilt setting operation, determination operation, etc., and PTO setting dial that is also used for independent PTO setting operation and on / off operation 42 (a rotary encoder with a switch).

  The monitor 30 is arranged at the upper center position on the upper surface of the monitor unit 8, and four selection switches 31 to 34 are arranged along the lower side thereof. The first setting operation dial 40 and the second setting operation dial 41 are arranged in a left-right distribution manner below the monitor 30, and four cursor movement switches 35 to 38 and a determination switch 39 are arranged therebetween. The PTO setting dial 42 is arranged on the right side of the monitor 30, but its position and presence are arbitrary.

  The screen displayed on the monitor 30 includes an automatic selection screen (work machine selection screen) 100 for selecting a work machine, and a simple rotary setting screen 110 displayed when “Rotary” is selected on the automatic selection screen 100. The rotary detailed setting screen 111, the rotary time display screen 112 and the rotation speed display screen 113 that can be selectively transferred from the rotary simple setting screen 110, and the hello displayed when “Hello” is selected on the automatic selection screen 100. When “Plow” is selected on the simple setting screen 120, the hello detailed setting screen 121 that can be selectively transferred from the hello simple setting screen 120, the hello time display screen 122, the rotation speed display screen 123, and the automatic selection screen 100 Selectable from the displayed simple plow setting screen 130 and simple plow setting screen 130 Detailed plow setting screen 131, plow time display screen 132 and rotation speed display screen 133, S mode simple setting screen 140 displayed when “S mode” is selected on automatic selection screen 100, and S mode simple setting screen S mode detailed setting screen 141, S mode time display screen 142 and rotation speed display screen 143 that can be selectively shifted from 140, and simple laser setting screen 150 displayed when “Laser” is selected on automatic selection screen 100. When “other setting” is selected on the laser detailed setting screen 151, the laser time display screen 152, the rotation speed display screen 153, and the automatic selection screen 100 that can be selectively transferred from the laser simple setting screen 150, or Displayed when “Other” is selected on the detailed setting screen 111, 121, 131, 141, 151 of the work machine. "Setting" on the other setting screen 160, the usage display screen 170 displayed when "Usage" is selected on the automatic selection screen 100, and the time display screens 112, 122, 132, 142, 152 of each work machine. There is a time setting screen 180 that is displayed when the user selects, and through these screens, display and setting of control conditions regarding various work machines are performed.

  That is, the monitor initial screen of the monitor unit 8 that is also used as a control condition display tool and a setting tool is used as a work machine selection screen, and a control condition setting screen for each work machine is formed in the lower layer. Therefore, by selecting the work implement on the initial monitor screen, only the setting items related to the selected work implement are displayed. Therefore, the monitor screen is compared with the conventional one that displays a list of the set items relating to all work implements. In addition to improving the visibility of the setting item, the setting item selection operation can be facilitated. In addition, since there are multiple setting screens related to the same work implement, a simple setting screen that displays items with a high setting frequency and a detailed setting screen that displays items with a low setting frequency are configured separately to suit user preferences. The setting screen can be selected.

  Next, the configuration and function of each screen will be described. However, although the setting screens related to each work machine are different in target control conditions, the configuration and functions of the screens are substantially the same, so only the setting screens related to the rotary and plow will be described, and this description will be used for other tasks. This is used to explain the setting screen related to the machine. Further, illustration and description of screens not directly related to the present invention are omitted.

  On the automatic selection screen 100, work machine selection buttons (icons) such as a rotary button 100a, a hello button 100b, a plow button 100c, an S mode button 100d, a laser button 100e, and other setting buttons 100f are arranged. These work implement selection buttons are selected by a button touch operation on the touch panel or a cursor C move operation by the cursor movement switches 35 to 38, and the touch panel button touch operation in the selected state or the determination switch 39 is pressed. Determined by operation. Then, when the work machine selection button is determined, the corresponding work machine simple setting screen 110, 120, 130, 140, 150, or other setting screen 160 is displayed.

  In addition, a usage button 100g is arranged at the lower end of the automatic selection screen 100 so as to correspond to the positions of the selection switches 31 to 34. The usage button 100g is determined by a button touch operation on the touch panel or a pressing operation of the selection switch 31 arranged at a corresponding position. When the usage button 100g is determined, the usage display screen 170 is displayed.

  The rotary simple setting screen 110 includes an automatic depth on / off button 110a, an automatic inclination on / off button 110b, an illustration 110c of the machine body and the rotary, and a current depth setting value (or depth detection value) of the automatic tilling control. ) Displaying a depth display unit 110d, a tilt setting display unit 110e displaying a current tilt setting value (or tilt detection value) of automatic tilt control, and a current height setting value (or height) of laser automatic control. And a laser height display portion 110f indicating a detection value). The automatic depth on / off button 110a and the automatic tilt on / off button 110b are selected by a touch operation on the touch panel or a movement operation of the cursor C by the cursor movement switches 35 to 38, and the touch panel button touch device in the selected state. Alternatively, it is determined by pressing the determination switch 39. When the depth automatic on / off button 110a or the tilt automatic on / off button 110b is determined, the ON / OFF state of the automatic tilling control or the automatic tilt control is reversed and displayed on the button. Further, ON / OFF of the tilling depth automatic control can also be switched by pressing the first setting operation dial 40, and ON / OFF of the tilt automatic control can also be switched by pressing the second setting operation dial 41. It is like that.

  In addition, an automatic button 110g, a clock button 110h, a rotation number button 110i, and a setting button 110j are arranged at the lower end of the rotary simple setting screen 110 so as to correspond to the positions of the selection switches 31 to 34. These buttons are determined by a button touch operation on the touch panel or a pressing operation of the selection switches 31 to 34 arranged at corresponding positions. Then, when the selection button 110g is determined, the screen returns to the selection screen 100, and when the clock button 110h is determined, the screen shifts to the rotary time display screen 112. When the rotation speed button 110i is determined, the rotation is performed. When the screen shifts to the number display screen 113 and the setting button 110j is further determined, the screen shifts to the rotary detailed setting screen 111.

  The rotary detailed setting screen 111 includes an automatic depth on / off button 111a, an automatic inclination on / off button 111b, a depth setting unit 111c for displaying the depth setting value of the tilling automatic control in illustrations and numerical values, and automatic inclination. An inclination setting unit 111d for displaying the control inclination setting value as an illustration and a numerical value and an illustration 111e showing the cursor movement switches 35 to 38 are arranged. The automatic depth on / off button 111 a is switched by pressing the first setting operation dial 40, and the automatic tilt on / off button 111 b is switched by pressing the second setting operation dial 41. In addition, the display of the depth setting value in the depth setting unit 111c is changed by the turning operation of the first setting operation dial 40, and the display of the inclination setting value in the inclination setting unit 111d is the turning operation of the second setting operation dial 41. Will be changed by. Thereby, it becomes possible to change the depth setting of tilling automatic control, and the inclination setting of inclination automatic control. In addition, the positions of the depth setting unit 111c, the inclination setting unit 111d, and the illustration 111e on the rotary detailed setting screen 111 are the positions of the first setting operation dial 40, the second setting operation dial 41, and the cursor movement switches 35 to 38 on the monitor unit 8, respectively. Corresponds to the position. As a result, the dial to be operated can be easily recognized.

  In addition, a return button 111f and other buttons 111g are arranged at the lower end of the rotary detail setting screen 111 so as to correspond to the positions of the selection switches 31-34. These buttons are determined by a button touch operation on the touch panel or a pressing operation of the selection switches 31 to 34 arranged at corresponding positions. When the return button 111f is determined, the screen returns to the rotary simple setting screen 110. When the other button 111g is determined, the screen shifts to the other setting screen 160.

  On the simple plow setting screen 130, a draft automatic on / off button 130a, an automatic tilt on / off button 130b, an aircraft and plow illustration 130c, and a draft display for displaying current setting values (or detection values) of automatic draft control. 130d, an inclination setting display unit 130e for displaying the current inclination setting value (or inclination detection value) of the automatic inclination control, and a laser height indicating the current height setting value (or height detection value) of the automatic laser control. A display portion 130f is arranged. The draft automatic on / off button 130a and the automatic tilt on / off button 130b are selected by a button touch operation using the touch panel or a cursor C moving operation by the cursor movement switches 35 to 38, and the touch panel button touch device in the selected state. Alternatively, it is determined by pressing the determination switch 39. When the draft automatic on / off button 130a or the tilt automatic on / off button 130b is determined, the ON / OFF state of the draft automatic control or the tilt automatic control is reversed and displayed on the button. The automatic draft control ON / OFF can also be switched by pressing the first setting operation dial 40, and the automatic tilt control ON / OFF can also be switched by pressing the second setting operation dial 41. It is.

  At the lower end of the simple plow setting screen 130, an automatic button 130g, a clock button 130h, a rotation number button 130i, and a setting button 130j are arranged so as to correspond to the positions of the selection switches 31 to 34. These buttons are determined by a button touch operation on the touch panel or a pressing operation of the selection switches 31 to 34 arranged at corresponding positions. Then, when the automatic selection button 130g is determined, the screen returns to the automatic selection screen 100. When the clock button 130h is determined, the plow time display screen 132 is displayed. When the rotational speed button 130i is determined, the rotation is performed. When the screen moves to the number display screen 133 and the setting button 130j is further determined, the screen moves to the plow detailed setting screen 131.

  On the plow detailed setting screen 131, a draft automatic on / off button 131a, an automatic inclination on / off button 131b, a draft setting unit 131c for displaying setting values for draft automatic control in illustrations and numerical values, and an inclination setting value for automatic inclination control. Are arranged with an illustration and a numerical value, and an illustration 131e showing cursor movement switches 35-38 is arranged. The draft automatic on / off button 131a is switched by pressing the first setting operation dial 40, and the tilt automatic on / off button 131b is switched by pressing the second setting operation dial 41. The display of the depth setting value in the draft setting unit 131c is changed by the turning operation of the first setting operation dial 40, and the display of the inclination setting value in the inclination setting unit 131d is performed by the turning operation of the second setting operation dial 41. Be changed. Thereby, it becomes possible to change the setting of draft automatic control and the inclination setting of inclination automatic control.

  In addition, a return button 131f and other buttons 131g are arranged at the lower end of the plow detailed setting screen 131 so as to correspond to the positions of the selection switches 31 to 34. These buttons are determined by a button touch operation on the touch panel or a pressing operation of the selection switches 31 to 34 arranged at corresponding positions. When the return button 131f is determined, the screen returns to the simple plow setting screen 130. When the other button 131g is determined, the screen shifts to the other setting screen 160. Incidentally, on the other setting screen 160, a backup on / off button 160a, a double-acting on / off button 160b, a bit-up setting unit 160c, a raise restriction setting unit 160d and a return button 160e are arranged. Operated by touch panel or switch / dial.

  The monitor screen control is performed in the control unit 7 or the dedicated monitor control unit described above. The monitor screen control routine includes an automatic screen switching routine for automatically switching the monitor screen according to the operation of a predetermined operation tool, and an automatic screen return routine for automatically returning the monitor screen to the standard screen as time elapses. In accordance with the touch panel operation on the monitor screen and the switch / dial operation of the monitor unit 8, the normal display control routine for controlling the display of the monitor screen as described above, the contrast adjustment routine for adjusting the contrast of the monitor screen, and the monitor screen And a setting storage routine for storing the set control conditions. Hereinafter, among these control routines, a screen automatic switching routine, a screen automatic return routine, a contrast adjustment routine, and a setting storage routine will be described with reference to flowcharts.

  When the screen automatic switching routine determines the operation of the first setting operation dial 40 provided on the monitor unit 8 or the operation of the tilt switch 10 provided on the main speed change lever 9, and determines that either is operated, It is further determined whether or not the current monitor screen is a detailed setting screen for the current work machine type. If the determination result is NO, the current monitor screen is automatically switched to the detailed setting screen for the current work machine type. For example, when the first setting operation dial 40 or the tilt switch 10 is operated while the rotary simple setting screen 110 is displayed, the monitor screen is automatically switched to the rotary detailed setting screen 111. This eliminates the need for a screen transition operation to the rotary detail setting screen 111, thereby reducing the operator's operation effort. Further, in the present embodiment, the first setting operation dial 40 and the tilt switch 10 are placed at positions where the operator can easily operate (the first setting operation dial 40 is the closest position to the operator in the monitor unit 8, and the tilt switch 10 is the main shift lever. 9), the operability of depth setting and tilt setting can be further improved.

  The screen automatic return routine monitors the screen operation by the touch panel or the operation tool, and resets the timer every time the screen operation is determined. When no screen operation continues for a predetermined time, this is judged by a timer, and the monitor screen is automatically returned to the standard screen. The standard screen referred to in the present embodiment is the uppermost screen among the screens related to the selected work machine. For example, when a predetermined time elapses while the rotary detailed setting screen 111 is displayed, the rotary simple setting is performed. The screen 110 is automatically restored. This eliminates the need to return to the upper screen after displaying the lower screen, thereby simplifying the screen switching operation.

  The contrast adjustment routine includes an automatic adjustment mode for automatically adjusting the contrast of the monitor screen according to the temperature detected by a temperature sensor (eg, thermistor) provided in the vicinity of the monitor screen, and a monitor according to the operation of the contrast adjustment screen. And a manual adjustment mode for adjusting the contrast of the screen. Thereby, the change of the contrast by temperature can be suppressed and the visibility of a monitor screen can be improved. Further, since the contrast can be manually adjusted, the contrast can be adjusted according to the operator's preference.

  The setting storage routine monitors operations for changing various control conditions on the monitor screen, and stores the changes in the memory when the control conditions are changed. In the memory, a storage area is secured for each work machine type, and control conditions relating to each work machine are stored independently. For example, the inclination setting value for automatic inclination control set on the rotary detailed setting screen 111 and the inclination setting value for automatic inclination control set on the halo detailed setting screen 121 are stored and held individually. In this way, control conditions suitable for each work machine can be stored individually. Therefore, when a work machine is replaced, it is possible to apply control conditions suitable for that work machine simply by selecting the work machine. become. Accordingly, the setting operation can be greatly simplified as compared with the conventional configuration in which the setting is performed again every time the work machine is replaced. As a memory for storing the control conditions, a nonvolatile memory such as an EEPROM is preferable. In this way, even if the main power is turned off, the control conditions are stored and retained, so there is no need to redo the setting at the next work.

  The traveling machine body 1 according to the present embodiment configured as described above includes an operation unit 6 provided with a driver's seat 22, a work machine connection unit 4 capable of selectively connecting various work machines, and set control conditions. And a control unit 7 for controlling the attitude of the work implement, wherein the operation unit 6 is provided with a monitor unit 8 that is also used as a control condition display and setting tool, and an initial screen of the monitor unit 8 is displayed. Since the work machine selection screen for selecting the type of work machine is used, and the control condition setting screen for each work machine is configured in the lower layer, the work selected by selecting the work machine on the initial screen of the monitor unit 8 is selected. Only setting items related to the machine will be displayed. This not only improves the visibility of the monitor screen, but also facilitates the setting item selection operation, as compared with the conventional display that displays a list of setting items related to all work machines.

  In addition, the setting screen of the monitor unit 8 is configured independently for each type of work machine, and the control conditions set on the setting screens of various work machines are stored, so that the work machine is replaced. In addition, the control conditions suitable for the work implement can be applied only by selecting the work implement. Accordingly, the setting operation can be greatly simplified as compared with the conventional configuration in which the setting is performed again every time the work machine is replaced.

  Needless to say, the present invention is not limited to the above embodiment. For example, a display mode selection screen for selecting the display mode of the monitor screen may be configured in the upper layer of the work machine selection screen. In this case, the initial screen of the monitor unit can be defined as the initial screen (work machine selection screen) of each display mode. For example, as a display mode, a favor mode and an automatic mode are prepared, and the screen is displayed in the automatic mode. Further, in the favor mode, in addition to the screen described above, a detailed setting screen for each control function is configured in the lower layer of the detailed setting screen of each work machine, and detailed setting for each control function is made possible here. If it does in this way, it can select a mode only as needed and can set more detailed control conditions. It goes without saying that the control conditions set on the detailed setting screen for each control function are also stored. As the detailed setting screen for each control function described above, there is an automatic tilling depth control detailed setting screen (ON / OFF setting of tilling depth automatic control, depth setting, hydraulic pressure sensitivity setting, dashing setting, ascent speed setting, machining speed setting, etc. Possible) and tilt automatic control detailed setting screen (ON / OFF setting of tilt automatic control, slope mode / horizontal mode setting, tilt setting, hydraulic sensitivity setting, parallel return function ON / OFF setting, ascent speed setting, descending speed setting) Is possible).

It is a side view of a traveling machine body. It is a block diagram which shows the input / output of a control part. It is a top view of an operation part. It is a principal part perspective view of an operation part. It is a front view of a monitor unit. It is a block diagram which shows the hierarchy of a monitor screen. It is explanatory drawing of an automatic selection screen. It is explanatory drawing of a rotary simple setting screen. It is explanatory drawing of a rotary detailed setting screen. It is explanatory drawing of a rotation speed display screen. It is explanatory drawing of a hello simple setting screen. It is explanatory drawing of a hello detailed setting screen. It is explanatory drawing of a plow simple setting screen. It is explanatory drawing of a plow detailed setting screen. It is explanatory drawing of a S mode simple setting screen. It is explanatory drawing of a S mode detailed setting screen. It is explanatory drawing of a laser simple setting screen. It is explanatory drawing of a laser detailed setting screen. It is explanatory drawing of an other setting screen. It is a flowchart of a monitor screen control routine. It is a flowchart of a screen automatic switching routine. It is a flowchart of a screen automatic return routine. It is a flowchart of a contrast adjustment routine. It is a flowchart of a setting storage routine.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Traveling machine body 4 Working machine connection part 6 Operation part 7 Control part 8 Monitor unit 9 Main transmission lever 10 Tilt switch 22 Driver's seat 25 Hydraulic operation lever 27 Rear fender 30 Monitors 31-34 Selection switch 35-38 Cursor movement switch 39 Determination switch 40 First setting operation dial 41 Second setting operation dial 42 PTO setting dial 100 Selection screen 110 Rotary simple setting screen 111 Rotary detailed setting screen

Claims (1)

In a tractor including an operation unit provided with a driver's seat, a three-point link mechanism that can selectively connect various work machines, and a control unit that controls the postures of the various work machines under set control conditions, The operation unit is provided with a monitor unit which is also used as a display tool and a setting tool for the control conditions, and the setting screen of the monitor unit is configured independently for each type of the work implement, and various work implements are set. When the control conditions set on the screen are configured to be storable, the monitor display of the monitor unit is a work machine selection screen for selecting the type of work machine on the monitor initial screen, A control condition setting screen that displays only the setting items related to the selected work implement is set in the lower layer, and when various set control conditions are changed, the memory for storing the change is stored for each work implement type. Memory Tractor, characterized in that but is secured, is configured to independently store the control conditions for each working machine.

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