Operating device, work vehicle, and operation control method

Abstract

To provide an operation device which can improve the operability while suppressing increase in the number of components.SOLUTION: An operation device 1 comprises: a dial 12; a display unit 22; and an allocation unit 320. The dial 12 receives a rotation operation. The allocation unit 320 selectively allocates any function of an engine operation function of adjusting the rotation frequency of an engine 501 and a screen operation function of performing an operation according to a screen displayed on the display unit 22 to the dial 12. The allocation unit 320 preferably allocates the engine operation function to the dial 12 in accordance with the turn-on of a key switch that starts the engine 501.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to an operating device, a work vehicle, and an operation control method.

Background Art

[0002] The work machine described in Patent Document 1 includes a display device and a jog dial. The jog dial operates on a display item displayed on the display device. The display device and the jog dial are provided at a close position where an operator sitting in the driver's seat can visually recognize them within the same field of view. Therefore, the operator can operate the jog dial while looking at the display device, and it is easy to intuitively operate the display device.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the work machine described in Patent Document 1, in addition to the jog dial, a jog dial for adjusting the engine speed is required. Therefore, the number of parts increases.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide an operating device, a work vehicle, and an operation control method that can improve operability while suppressing an increase in the number of parts.

Means for Solving the Problems

[0006] According to one aspect of the present invention, an operating device includes a dial, a display unit, and an assignment unit. The dial accepts a rotational operation. The assignment unit selectively assigns to the dial either an engine operation function for adjusting the engine speed or an operation function for performing an operation according to a screen displayed on the display unit.

[0007] According to another aspect of the present invention, a work vehicle includes the above-described operating device and a work implement that performs work.

[0008] According to still another aspect of the present invention, an operation control method is executed in an operating device including a dial and a display unit. The operation control method includes a step of selectively assigning to the dial either an engine operation function for adjusting the engine speed or an operation function for performing an operation according to a screen displayed on the display unit, and a step of accepting a rotational operation of the dial.

Advantages of the Invention

[0009] According to the present invention, it is possible to provide an operating device, a work vehicle, and an operation control method that can improve operability while suppressing an increase in the number of parts.

Brief Description of the Drawings

[0010]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Mode for Carrying Out the Invention

[0011] Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

[0012] First, referring to FIG. 1, a work vehicle 100 according to an embodiment of the present invention will be described. Hereinafter, this embodiment will be described by taking the case where the work vehicle 100 is a hydraulic excavator as an example. The hydraulic excavator is an example of construction machinery.

[0013] FIG. 1 is a perspective view showing an upper swing body 200 of the work vehicle 100 according to this embodiment. In FIG. 1, the roof of the upper swing body 200 is omitted for easy viewing of the drawing.

[0014] As shown in FIG. 1, the work vehicle 100 includes an upper swing body 200. The upper swing body 200 swings with respect to a lower traveling body 400 (FIG. 4 described later). The upper swing body 200 is driven to swing by a hydraulic pump 600 (FIG. 4 described later) and a hydraulic motor (not shown). A work implement 300 (FIG. 4 described later) is attached to the upper swing body 200.

[0015] Specifically, the upper swing body 200 includes an operation device 1, a cab 205, a seat 210, a plurality of operation levers 220, and an arrangement member 230.

[0016] In the cab 205, the operation device 1, the seat 210, the plurality of operation levers 220, and the arrangement member 230 are arranged. An operator sits on the seat 210. The operator is an operator of the work vehicle 100. Each of the plurality of operation levers 220 receives an operation from the operator. The operation lever 220 is an operation member for operating the work vehicle 100.

[0017] The operation device 1 receives an operation from the operator and executes the operation of the work vehicle 100, the input of various information to the work vehicle 100, and the display of various information regarding the work vehicle 100. The operation device 1 includes a dial operation unit 10 and an operation unit 20.

[0018] The dial operation unit 10 receives a rotational operation from the operator. The dial operation unit 10 preferably receives a pressing operation from the operator. The dial operation unit 10 is disposed on the placement member 230. The shape and structure of the placement member 230 are not particularly limited as long as the dial operation unit 10 can be disposed on the placement member 230.

[0019] Specifically, the dial operation unit 10 includes a dial 12. The dial operation unit 10 preferably further includes at least one switch 14. In the present embodiment, the dial operation unit 10 includes a plurality of switches 14 (for example, three switches 14). The switch 14 is disposed adjacent to the dial 12 and receives an operation from the operator. Details of the dial 12 and each switch 14 will be described later. The switch 14 corresponds to an example of an "operating element" or a "first operating element".

[0020] The operation unit 20 displays various information and receives a pressing operation from the operator. The operation unit 20 includes a display unit 22 and at least one push button 24. In the present embodiment, the operation unit 20 includes a plurality of push buttons 24 (for example, six push buttons 24). The push button 24 corresponds to an example of a "second operating element". The display unit 22 displays various information regarding the work vehicle 100. For example, the display unit 22 displays the state of the work vehicle 100, a GUI (Graphical User Interface), or a camera image. The display unit 22 is, for example, a liquid crystal display or an organic electroluminescence display. The display unit 22 may include a touch panel. In this case, each push button 24 may be displayed on the display unit 22 as a widget of the GUI.

[0021] Next, the dial operation unit 10 will be described with reference to FIGS. 2(a) and 2(b). FIG. 2(a) is a perspective view showing the dial operation unit 10. FIG. 2(b) is a plan view showing the dial operation unit 10.

[0022] As shown in FIG. 2(a), the dial operation unit 10 preferably further includes a base member 17. A dial 12 and a plurality of switches 14 are arranged on the base member 17. As long as the dial 12 and the switches 14 can be arranged on the base member 17, the shape and structure of the base member 17 are not particularly limited.

[0023] The dial 12 receives a rotation operation from the operator. As a result, the dial 12 rotates. The dial 12 includes, for example, a dial body grasped by the operator, a rotation shaft, and a rotation sensor that detects the amount of rotation of the dial body. The dial body has, for example, a substantially bottomed cylindrical shape. The rotation sensor is, for example, a rotary encoder.

[0024] The dial 12 preferably receives not only a rotation operation but also a pressing operation from the operator. That is, the dial 12 preferably also functions as a push button.

[0025] Either an engine operation function or a screen operation function is selectively assigned to the dial 12. The engine operation function is a function of adjusting (controlling) the rotational speed of the engine 501 (FIG. 4 described later). The screen operation function is a function of performing an operation according to the image displayed on the display unit 22. That is, the screen operation function is a function of operating the screen displayed on the display unit 22.

[0026] According to the present embodiment, the operation device 1 can adjust the rotational speed of the engine 501 and perform an operation according to the screen displayed on the display unit 22 with one dial 12. As a result, compared with the case where the operation device 1 includes a dial for adjusting the rotational speed of the engine 501 and a dial for performing an operation according to the screen displayed on the display unit 22, respectively, the increase in the number of parts of the operation device 1 can be suppressed, and the operability of the operation device 1 can be improved by the dial 12.

[0027] Also, in this embodiment, the dial 12 is shared for the rotation operation for adjusting the rotational speed of the engine 501 and the rotation operation for operating the screen of the display unit 22. Therefore, the position of the dial 12 for performing the rotation operation is the same when adjusting the rotational speed of the engine 501 and when operating the screen of the display unit 22. As a result, the operability of the dial 12 can be further improved. Also, for example, by arranging the dial 12 in the vicinity of the operation lever 220, when an engine operation function is assigned to the dial 12, the operator can smoothly coordinate the rotation operation of the dial 12 and the operation of the operation lever 220.

[0028] In particular, in this embodiment, the switch 14A among the plurality of switches 14 is an operator for instructing to change the function assigned to the dial 12 between the engine operation function and the screen operation function. Therefore, the operator can easily change the function assigned to the dial 12 by operating the switch 14A. The switch 14A has an icon 16A. The icon 16A indicates that the switch 14A is an operator for changing the function assigned to the dial 12.

[0029] Also, the switch 14B among the plurality of switches 14 is an operator for instructing to display the initial screen SCA (FIG. 3 described later) on the display unit 22. Therefore, the operator can immediately display the initial screen SCA on the display unit 22 by operating the switch 14B. The control of the switch 14B will be described later. The switch 14B has an icon 16B. The icon 16B indicates that the switch 14B is an operator for displaying the initial screen SCA.

[0030] Furthermore, the switch 14C among the plurality of switches 14 is an operator for instructing to return from the currently displayed screen on the display unit 22 to the previous screen. Therefore, the operator can easily display the previous screen on the display unit 22 by operating the switch 14C. The control of the switch 14C will be described later. The switch 14C has an icon 16C. The icon 16C indicates that the switch 14C is an operator for returning to the previous screen.

[0031] In particular, switches 14A to 14C are arranged next to the dial 12. Therefore, the operator can easily operate the dial 12 and switches 14A to 14C. Also, switches 14A to 14C are arranged side by side in a certain direction.

[0032] Hereinafter, switch 14A, switch 14B, and switch 14C may be described as assignment change switch 14A, initial screen switch 14B, and return switch 14C, respectively.

[0033] As shown in FIG. 2(b), the operating device 1 has at least one of the signs LB1 and LB2. Each of the signs LB1 and LB2 indicates that the dial 12 has an engine operation function. Therefore, according to the present embodiment, the operator can easily recognize that the dial 12 has an engine operation function by the sign LB1 or the sign LB2.

[0034] Also, the sign LB1 is arranged next to the dial 12. Therefore, the operator can easily recognize that the sign LB1 is a sign related to the dial 12. In the example of FIG. 2(b), the sign LB1 is arranged on the arranging member 230. Note that the sign LB1 may be arranged on the base member 17, for example.

[0035] On the other hand, the sign LB2 is arranged on the dial 12. Therefore, the operator can easily recognize that the sign LB2 is a sign related to the dial 12. In the example of FIG. 2(b), the sign LB2 is arranged on the upper surface of the dial 12.

[0036] Note that the signs LB1 and LB2 may be formed by, for example, engraving or painting.

[0037] Next, referring to FIG. 3, the display unit 22 and the push buttons 24 will be described. FIG. 3 is a diagram showing the display unit 22 and the plurality of push buttons 24. As shown in FIG. 3, the display unit 22 displays the initial screen SCA. The initial screen SCA includes a time display area 50, an assigned function display area 52, an operation time display area 54, a fuel information display area 56, a camera image display area 58, an icon display area 60, an option information display area 62, a rotation speed display area 64, and a selected area 65.

[0038] The time is displayed in the time display area 50. Information indicating the function assigned to the dial 12 is displayed in the assigned function display area 52. Details of the assigned function display area 52 will be described later. The operation time of the work vehicle 100 is displayed in the operation time display area 54. Information regarding the fuel of the engine 501 is displayed in the fuel information display area 56. For example, the remaining amount of fuel of the engine 501 and the operable time are displayed in the fuel information display area 56. The image of the backup camera mounted on the work vehicle 100 is displayed in the camera image display area 58. Various icons indicating the functions and states of the respective parts of the work vehicle 100 are displayed in the icon display area 60. Option information regarding the work vehicle 100 is displayed in the option information display area 62. The rotation speed of the engine 501 is displayed in the rotation speed display area 64.

[0039] The selected area 65 is an area for being selected by an operator. Specifically, the selected area 65 includes at least one selected part 66. In this embodiment, the selected area 65 includes a plurality of selected parts 66 (for example, six selected parts 66). The plurality of selected parts 66 are arranged in a straight line. The selected part 66 is, for example, an object. A function related to an operation on the screen or a function related to a setting for the work vehicle 100 is assigned to a part or all of the plurality of selected parts 66. In the example of FIG. 3, the functions corresponding to the initial screen SCA are assigned to the respective selected parts 66. However, when another screen is displayed on the display unit 22, the functions corresponding to the screen are assigned to the respective selected parts 66. When the selection of one selected part 66 is determined on the initial screen SCA, the display unit 22 displays a screen corresponding to the function assigned to the selected part 66.

[0040] Further, a plurality of push buttons 24 are arranged corresponding to the plurality of selected parts 66 respectively. The plurality of push buttons 24 are arranged in a straight line.

[0041] Specifically, when an engine operation function is assigned to the dial 12, the operation of the display unit 22 by the dial operation unit 10 is prohibited. Therefore, in this case, when the push button 24 is pressed on the initial screen SCA, the selection of the selected part 66 corresponding to the push button 24 is determined.

[0042] On the one hand, when a screen operation function is assigned to the dial 12, the operation of the display unit 22 by the dial operation unit 10 is permitted. Therefore, in this case, on the initial screen SCA, the display unit 22 displays a cursor (hereinafter referred to as "cursor CS") on one of the plurality of selected parts 66. The cursor CS is an image indicating that the selected part 66 is selected. In a broad sense, the cursor CS is an image indicating that the target is selected. The cursor CS has, for example, a specific color. Then, the cursor CS moves in response to the rotation operation of the dial 12, and the selected selected part 66 is changed. Further, when a pressing operation is performed on the dial 12, the selection of the selected part 66 is confirmed. Also, even when a screen operation function is assigned to the dial 12, similar to the case where an engine operation function is assigned to the dial 12, it is possible to confirm the selection of the selected part 66 by the push button 24.

[0043] Hereinafter, when the plurality of selected parts 66 are described separately, the plurality of selected parts 66 may be described as selected parts 66A, 66B, 66C, 66D, 66E, and 66F, respectively. Also, when the plurality of push buttons 24 are described separately, the plurality of push buttons 24 may be described as push buttons 24A, 24B, 24C, 24D, 24E, and 24F, respectively. In the example of FIG. 3, push buttons 24A to 24F are arranged in one-to-one correspondence with the selected parts 66A to 66F, respectively.

[0044] Next, with reference to FIG. 4, the work vehicle 100 will be described. FIG. 4 is a block diagram showing the work vehicle 100. As shown in FIG. 4, in addition to the operation device 1 and the upper swing body 200, the work vehicle 100 further includes a work implement 300, a lower traveling body 400, a blade (not shown), an engine unit 500, a hydraulic pump 600, a control valve 700, and an oil tank 800. The operation device 1 further includes a main control device 30. The main control device 30 is arranged, for example, inside the upper swing body 200 at a position different from the dial operation unit 10 and the operation unit 20.

[0045] The work machine 300 performs work. Specifically, the work machine 300 includes a bucket (not shown), an arm (not shown), a boom (not shown), and a plurality of hydraulic cylinders (not shown).

[0046] The upper swing body 200 is disposed above the lower traveling body 400 via a swivel joint (not shown). The lower traveling body 400 travels. Specifically, the lower traveling body 400 includes a pair of crawlers (not shown) and a pair of hydraulic motors (not shown).

[0047] The engine unit 500 includes an engine 501 and an engine control device 503. The engine control device 503 controls the engine 501. The engine control device 503 is, for example, an ECU (Electronic Control Unit). Fuel is supplied to the engine 501 from a fuel tank (not shown).

[0048] The engine 501 drives a hydraulic pump 600. As a result, the hydraulic pump 600 sends out pressurized oil to a control valve 700. Pressurized oil means oil to which pressure is applied. The control valve 700 controls the flow of the pressurized oil according to the operation of each operation lever 220. The control valve 700 supplies pressurized oil to the hydraulic motor of the upper swing body 200, each hydraulic cylinder of the work machine 300, each hydraulic motor of the lower traveling body 400, and a hydraulic cylinder (not shown) that drives a blade.

[0049] The dial operation unit 10 outputs rotation operation information indicating the amount and direction of rotation of the dial 12 to the main control device 30. Further, the dial operation unit 10 outputs pressing operation information (on information or off) indicating whether or not the dial 12 has been pressed to the main control device 30. Furthermore, the dial operation unit 10 outputs operation information (on information or off information) indicating whether or not the switches 14A to 14C have been pressed to the main control device 30.

[0050] The dial operation unit 10 preferably further includes a light emitting unit 16 and a backlight 18.

[0051] The light emitting unit 16 emits visible light of different colors. For example, the light emitting unit 16 includes at least two light emitting elements that emit visible light of different colors. The light emitting element is, for example, an LED (light emitting diode). Details of the light emitting unit 16 will be described later.

[0052] The backlight 18 emits visible light toward the back surfaces of the switches 14A to 14C. For example, the backlight 18 includes a light emitting element that emits light toward the back surface of the switch 14A, a light emitting element that emits light toward the back surface of the switch 14B, and a light emitting element that emits light toward the back surface of the switch 14C. Alternatively, for example, the backlight 18 includes a light emitting element that emits light toward the back surface of the switch 14A and a light emitting element that emits light toward the back surfaces of the switches 14B and 14C. The light emitting element is, for example, an LED. Details of the backlight 18 will be described later.

[0053] Note that the dial operation unit 10 may include one of the light emitting unit 16 and the backlight 18.

[0054] The operation unit 20 further includes a display control device 26 and a sound output unit 28. The display control device 26 controls the display unit 22. The display control device 26 is, for example, an ECU. The sound output unit 28 outputs sound. The sound output unit 28 is, for example, a speaker or a buzzer.

[0055] Specifically, the display control device 26 includes a control unit 261 and a storage unit 263. The control unit 261 includes a processor such as a CPU (Central Processing Unit). The storage unit 263 includes a storage device and stores data and computer programs. Specifically, the storage unit 263 includes a main storage device such as a semiconductor memory and an auxiliary storage device such as a semiconductor memory, a solid state drive, and / or a hard disk drive. The storage unit 263 may include a removable medium. The storage unit 263 corresponds to an example of a non-transitory computer-readable storage medium.

[0056] The control unit 261 outputs various information input or set according to the operation of the screen displayed on the display unit 22 to the main control device 30.

[0057] The control unit 261 includes a display control unit 265. Specifically, the processor of the control unit 261 functions as the display control unit 265 by executing a computer program stored in the storage device of the storage unit 263. The display control unit 265 controls the display unit 22. For example, the display control unit 265 controls the screen displayed on the display unit 22 according to operation information (on information or off information) indicating whether the push buttons 24A to 24F are pressed. Details of the display control unit 265 will be described later.

[0058] The main control device 30 controls the dial operation unit 10, the operation unit 20, and the engine unit 500. The main control device 30 is, for example, an ECU.

[0059] Specifically, the main control device 30 includes a control unit 32 and a storage unit 34. The control unit 32 includes a processor such as a CPU. The storage unit 34 includes a storage device and stores data and computer programs. The hardware configuration of the storage unit 34 is, for example, the same as the hardware configuration of the storage unit 263.

[0060] The control unit 32 acquires the rotation operation information and the pressing operation information of the dial 12 from the dial operation unit 10, and also acquires the operation information of the switches 14A to 14C. In addition, the control unit 32 acquires various information input or set according to the operation of the screen displayed on the display unit 22 from the control unit 261 of the display control device 26.

[0061] The control unit 32 includes an allocation unit 320. Specifically, the processor of the control unit 32 functions as the allocation unit 320 by executing a computer program stored in the storage device of the storage unit 34.

[0062] The allocation unit 320 selectively allocates either the engine operation function for adjusting the rotational speed of the engine 501 or the screen operation function for performing an operation according to the screen displayed on the display unit 22 to the dial 12. Therefore, according to the present embodiment, compared with the case where a dedicated dial for adjusting the rotational speed of the engine 501 and a dedicated dial for performing an operation according to the screen displayed on the display unit 22 are provided respectively, while suppressing an increase in the number of parts of the operation device 1, the operability of the operation device 1 can be improved by the dial 12.

[0063] Specifically, based on the operation information of the allocation change switch 14A, the allocation unit 320 switches the function allocated to the dial 12 between the engine operation function and the screen operation function. Then, the allocation unit 320 stores information indicating that the engine operation function is allocated to the dial 12 or information indicating that the screen operation function is allocated to the dial 12 in a specific area of the storage unit 34 (hereinafter referred to as "specific area MEM1").

[0064] The fact that information indicating that the engine operation function is allocated to the dial 12 is stored in the specific area MEM1 indicates that the adjustment of the rotational speed of the engine 501 by the dial 12 is permitted and the operation of the screen of the display unit 22 by the dial 12 is prohibited.

[0065] On the other hand, the fact that information indicating that the screen operation function is allocated to the dial 12 is stored in the specific area MEM1 indicates that the adjustment of the rotational speed of the engine 501 by the dial 12 is prohibited and the operation of the screen of the display unit 22 by the dial 12 is permitted.

[0066] Also, when a screen operation function is assigned to the dial 12, the assignment unit 320 receives the operation information of the initial screen switch 14B and the return switch 14C as valid information. Therefore, according to the present embodiment, when a screen operation function is assigned to the dial 12, the dial operation unit 10 can be given the same operability as the push buttons 24A to 24F of the operation unit 20.

[0067] In addition, when a screen operation function is assigned to the dial 12, the assignment unit 320 receives the rotation operation information and the pressing operation information of the dial 12 as valid information.

[0068] On the other hand, when an engine operation function is assigned to the dial 12, the assignment unit 320 does not receive the operation information of the initial screen switch 14B and the return switch 14C as invalid information. In this way, when an engine operation function is assigned to the dial 12, by disabling the initial screen switch 14B and the return switch 14C related to the operation of the screen of the display unit 22, it can be shown to the operator that an engine operation function is assigned to the dial 12.

[0069] In addition, when an engine operation function is assigned to the dial 12, the assignment unit 320 receives the rotation operation information of the dial 12 as valid information and does not receive the pressing operation information of the dial 12 as invalid information.

[0070] Also, the assignment unit 320 receives the operation information of the assignment change switch 14A as valid information regardless of the function assigned to the dial 12.

[0071] In addition, when an engine operation function is assigned to the dial 12, the display control unit 265 of the operation unit 20 may operate so as not to receive the operation information of the initial screen switch 14B and the return switch 14C, and the pressing operation information of the dial 12 as invalid information.

[0072] In addition, the allocation unit 320 allocates an engine operation function to the dial 12 in response to the key switch for starting the engine 501 being turned on. Therefore, according to the present embodiment, the operator can adjust the rotational speed of the engine 501 immediately after turning on the key switch by operating the dial 12. As a result, the convenience for the operator can be improved.

[0073] Furthermore, the allocation unit 320 controls the engine unit 500. Specifically, when an engine operation function is allocated to the dial 12, the allocation unit 320 controls the engine control device 503 to adjust (set) the rotational speed of the engine 501 to a rotational speed corresponding to the rotational operation information of the dial 12. As a result, the engine control device 503 adjusts (sets) the rotational speed of the engine 501 to a rotational speed corresponding to the rotational operation information of the dial 12.

[0074] Also, the allocation unit 320 controls the operation unit 20. Specifically, when a screen operation function is allocated to the dial 12, the allocation unit 320 outputs information indicating that the screen operation function is allocated to the dial 12, the rotational operation information and pressing operation information of the dial 12, and the operation information of the initial screen switch 14B and the return switch 14C to the control unit 261 of the display control device 26. Then, the display control unit 265 of the control unit 261 controls the screen displayed on the display unit 22 based on the rotational operation information and pressing operation information of the dial 12, and the operation information of the initial screen switch 14B and the return switch 14C. In addition, the display control unit 265 controls the screen displayed on the display unit 22 based on the operation information of the push buttons 24A to 24F.

[0075] On the other hand, when the engine operation function is assigned to the dial 12, the allocation unit 320 outputs information indicating that the engine operation function is assigned to the dial 12 to the control unit 261 of the display control device 26. In this case, the allocation unit 320 does not output the rotation operation information and the pressing operation information of the dial 12, and the operation information of the initial screen switch 14B and the return switch 14C to the control unit 261 of the display control device 26. When the engine operation function is assigned to the dial 12, the display control unit 265 of the control unit 261 controls the screen displayed on the display unit 22 based on the operation information of the push buttons 24A to 24F.

[0076] The control unit 261 of the display control device 26 stores information indicating that the engine operation function is assigned to the dial 12, or information indicating that the screen operation function is assigned to the dial 12 in a specific area of the storage unit 263 (hereinafter referred to as "specific area MEM2").

[0077] Continuing to refer to FIGS. 2(a) and 4, the notification of the function assigned to the dial 12 will be described. The light emitting unit 16 receives the control of the allocation unit 320 and visually notifies the function assigned to the dial 12 on the dial 12 so that it can be recognized. Specifically, the light emitting unit 16 receives the control of the allocation unit 320 and emits visible light of different colors at the base end portion 12A of the dial 12 depending on whether the engine operation function or the screen operation function is assigned to the dial 12. Therefore, according to the present embodiment, the operator can intuitively recognize the function assigned to the dial 12. The light emitting unit 16 corresponds to an example of the "function notification unit".

[0078] For example, when an engine operation function is assigned to the dial 12, the light emitting unit 16 emits visible light of a first color (e.g., white) from the gap between the base end portion 12A of the dial 12 and the base member 17 under the control of the assignment unit 320. On the other hand, for example, when a screen operation function is assigned to the dial 12, the light emitting unit 16 emits visible light of a second color (e.g., blue) from the gap between the base end portion 12A of the dial 12 and the base member 17 under the control of the assignment unit 320.

[0079] Next, with reference to FIGS. 5(a) and 5(b), the operation of the operation device 1 when an engine operation function is assigned to the dial 12 will be described. FIG. 5(a) is a diagram showing a first function notification image 70 displayed in response to the assignment of an engine operation function to the dial 12. FIG. 5(b) is a diagram showing the lighting state of the dial operation unit 10 when an engine operation function is assigned to the dial 12.

[0080] As shown in FIG. 5(a), the display control unit 265 shown in FIG. 4 controls the display unit 22 to temporarily display the first function notification image 70 in response to the assignment of an engine operation function to the dial 12. As a result, the display unit 22 temporarily displays the first function notification image 70. The first function notification image 70 indicates that an engine operation function has been assigned to the dial 12. The first function notification image 70 corresponds to an example of "first function notification information". According to the present embodiment, the operator can easily recognize that the function assigned to the dial 12 is an engine operation function by viewing the first function notification image 70. The display control unit 265 corresponds to an example of a "function notification unit".

[0081] In addition, after the temporary display of the first function notification image 70, the operator can visually recognize again the image located behind the first function notification image 70. In particular, in the example of FIG. 5(a), the display unit 22 temporarily displays the first function notification image 70 in the camera video display area 58. Therefore, after the temporary display of the first function notification image 70, the operator can visually recognize again the video displayed in the camera video display area 58.

[0082] In the example of FIG. 5(a), although the first function notification image 70 is displayed on the initial screen SCA, similarly on other screens, in response to the engine operation function being assigned to the dial 12, the display unit 22 temporarily displays the first function notification image 70.

[0083] As shown in FIG. 5(b), the backlight 18 shown in FIG. 4 irradiates visible light toward the back surface of the icon 16A of the assignment change switch 14A under the control of the assignment unit 320, and lights up the icon 16A to indicate that the engine operation function is assigned to the dial 12. On the other hand, the backlight 18 does not irradiate visible light toward the back surfaces of the icon 16B of the initial screen switch 14B and the icon 16C of the return switch 14C under the control of the assignment unit 320. Therefore, when the engine operation function is assigned to the dial 12, only the icon 16A of the assignment change switch 14A lights up. As a result, the operator can intuitively recognize that the function assigned to the dial 12 is the engine operation function. The backlight 18 corresponds to an example of the "function notification unit".

[0084] Also, in the example of FIG. 5(b), the backlight 18 irradiates light toward the back surface of the icon 16A arranged next to the dial 12, and visually notifies the function assigned to the dial 12 so that it can be recognized. That is, the backlight 18 visually notifies the function assigned to the dial 12 so that it can be recognized next to the dial 12. Therefore, since the dial 12 and the notification position (that is, the position of the icon 16A) are close, the operator can easily recognize that the notification regarding the dial 12 is being performed.

[0085] Next, with reference to FIG. 6, the notification of the engine 501 rotation speed will be described. FIG. 6 is a diagram showing a rotation speed image 75 displayed on the display unit 22 when an engine operation function is assigned to the dial 12. As shown in FIG. 6, when an engine operation function is assigned to the dial 12, the display unit 22 temporarily displays the rotation speed image 75 in response to the rotation operation of the dial 12 under the control of the display control unit 265. The rotation speed image 75 indicates the rotation speed of the engine 501. According to the present embodiment, the operator can easily confirm whether the rotation speed of the engine 501 has been set to a desired rotation speed by operating the dial 12 by looking at the rotation speed image 75. The rotation speed image 75 corresponds to an example of "rotation speed information".

[0086] Further, after the temporary display of the rotation speed image 75, the operator can visually recognize again the image located behind the rotation speed image 75. In particular, in the example of FIG. 6, the display unit 22 temporarily displays the rotation speed image 75 in the camera video display area 58. Therefore, after the temporary display of the rotation speed image 75, the operator can visually recognize again the video displayed in the camera video display area 58.

[0087] In the example of FIG. 6, the rotation speed image 75 is displayed on the initial screen SCA. Similarly, on other screens, when an engine operation function is assigned to the dial 12, the display unit 22 temporarily displays the rotation speed image 75 in response to the rotation operation of the dial 12.

[0088] Next, with reference to FIGS. 7(a) and 7(b), the operation of the operating device 1 when a screen operation function is assigned to the dial 12 will be described. FIG. 7(a) is a diagram showing a second function notification image 80 displayed in response to the assignment of a screen operation function to the dial 12. FIG. 7(b) is a diagram showing the lighting state of the dial operation unit 10 when a screen operation function is assigned to the dial 12.

[0089] As shown in Fig. 7(a), in response to the screen operation function being assigned to the dial 12, the display control unit 265 shown in Fig. 4 controls the display unit 22 to temporarily display the second function notification image 80. As a result, the display unit 22 temporarily displays the second function notification image 80. The second function notification image 80 indicates that the screen operation function is assigned to the dial 12. The second function notification image 80 corresponds to an example of "second function notification information". According to the present embodiment, the operator can easily recognize that the function assigned to the dial 12 is the screen operation function by viewing the second function notification image 80.

[0090] In addition, after the temporary display of the second function notification image 80, the operator can visually recognize again the image located behind the second function notification image 80. In particular, in the example of Fig. 7(a), the display unit 22 temporarily displays the second function notification image 80 in the camera video display area 58. Therefore, after the temporary display of the second function notification image 80, the operator can visually recognize again the video displayed in the camera video display area 58.

[0091] In the example of Fig. 7(a), the second function notification image 80 is displayed on the initial screen SCA. Similarly, on other screens, the display unit 22 temporarily displays the second function notification image 80 in response to the screen operation function being assigned to the dial 12.

[0092] When the screen operation function is assigned to the dial 12, the display unit 22, under the control of the display control unit 265, displays the cursor CS on one of the selected parts 66A to 66F of the initial screen SCA. In Fig. 7(a), the cursor CS is indicated by hatching. Also, the display unit 22, under the control of the display control unit 265, moves the cursor CS on the selected parts 66A to 66F based on the rotation operation information of the dial 12. When the pressing operation information of the dial 12 indicates that the dial 12 has been pressed, the display control unit 265 determines the selection of the selected part 66 where the cursor CS is located. Further, the display control unit 265 controls the display unit 22 to display a screen corresponding to the selected part 66 whose selection has been determined.

[0093] Furthermore, the display control unit 265 controls the display unit 22 to display a function notification image 82 indicating that the screen operation function is assigned to the dial 12 over the period during which the screen operation function is assigned to the dial 12. Accordingly, the display unit 22 displays the function notification image 82 over the period during which the screen operation function is assigned to the dial 12. As a result, according to the present embodiment, the operator can easily recognize the function assigned to the dial 12 over the period during which the screen operation function is assigned to the dial 12. In the example of FIG. 7(a), the display unit 22 displays the function notification image 82 in the assigned function display area 52 under the control of the display control unit 265. The function notification image 82 corresponds to an example of "function notification information".

[0094] Note that the display control unit 265 may control the display unit 22 to display a function notification image indicating that the engine operation function is assigned to the dial 12 over the period during which the engine operation function is assigned to the dial 12.

[0095] As shown in FIG. 7(b), the backlight 18 shown in FIG. 4 irradiates visible light toward the back surfaces of the icon 16A of the assignment change switch 14A, the icon 16B of the initial screen switch 14B, and the icon 16C of the return switch 14C under the control of the assignment unit 320, and lights up the icons 16A to 16C to indicate that the screen operation function is assigned to the dial 12. Accordingly, when the screen operation function is assigned to the dial 12, all the icons 16A to 16C are lit. As a result, the operator can intuitively recognize that the function assigned to the dial 12 is the screen operation function.

[0096] Also, in the example of FIG. 7(b), the backlight 18 irradiates the back surfaces of the icons 16A to 16C arranged next to the dial 12, thereby visually notifying the function assigned to the dial 12 in a recognizable manner. That is, the backlight 18 visually notifies the function assigned to the dial 12 in a recognizable manner next to the dial 12. Therefore, since the dial 12 and the notification position (i.e., the positions of the icons 16A to 16C) are close, the operator can easily recognize that the notification regarding the dial 12 is being performed.

[0097] As described above with reference to FIGS. 4, 5(a), 5(b), 7(a), and 7(b), according to the present embodiment, the display control unit 265, the light emitting unit 16, and the backlight 18 visually notify which function of the engine operation function and the screen operation function is assigned to the dial 12 in a recognizable manner. Therefore, according to the present embodiment, the operator can easily recognize the function assigned to the dial 12. Note that not only the display control unit 265, the light emitting unit 16, and the backlight 18 but also the display unit 22 can be regarded as a "function notification unit".

[0098] Also, the sound output unit 28 shown in FIG. 4 may, under the control of the allocation unit 320, audibly notify which function of the engine operation function and the screen operation function is assigned to the dial 12 in a recognizable manner. Also in this case, the operator can easily recognize the function assigned to the dial 12.

[0099] Next, with reference to FIGS. 4, 8, and 9, an operation control method according to the present embodiment will be described. FIGS. 8 and 9 are flowcharts showing the operation control method executed in the work vehicle 100 (operation device 1). As shown in FIGS. 8 and 9, the operation control method includes steps S1 to S18.

[0100] As shown in FIG. 8, in step S1, the key switch of the work vehicle 100 is turned on.

[0101] Next, in step S2, the engine 501 starts.

[0102] Next, in step S3, the allocation unit 320 allocates an engine operation function to the dial 12.

[0103] Next, in step S4, the display unit 22 temporarily displays a first function notification image 70 (FIG. 5(a)) indicating that the engine operation function has been allocated to the dial 12.

[0104] Next, in step S5, the light emitting unit 16 emits visible light of a first color indicating that the engine operation function has been allocated to the dial 12 at the base end portion 12A of the dial 12.

[0105] Next, in step S6, the backlight 18 lights up the allocation change switch 14A and turns off the initial screen switch 14B and the return switch 14C.

[0106] Next, in step S7, the allocation unit 320 determines whether the dial 12 has rotated based on the rotation operation information of the dial 12. Step S7 corresponds to an example of "a step of receiving a rotation operation of the dial".

[0107] If it is determined in step S7 that the dial 12 has not rotated, the process proceeds to step S10.

[0108] On the other hand, if it is determined in step S7 that the dial 12 has rotated, the process proceeds to step S8.

[0109] In step S8, the allocation unit 320 adjusts the rotational speed of the engine 501 according to the rotation operation information of the dial 12 via the engine control device 503.

[0110] Next, in step S9, the display unit 22 temporarily displays a rotational speed image 75 (FIG. 6) indicating the rotational speed of the engine 501.

[0111] Next, in step S10, the display control unit 265 operates (controls) the screen of the display unit 22 based on the operation information of the push buttons 24A to 24F of the operation unit 20.

[0112] Next, in step S11, the allocation unit 320 determines whether the allocation change switch 14A has been pressed based on the operation information of the allocation change switch 14A.

[0113] If it is determined in step S11 that the allocation change switch 14A has not been pressed, the process proceeds to step S7.

[0114] On the other hand, if it is determined in step S11 that the allocation change switch 14A has been pressed, the process proceeds to step S12 in FIG. 9.

[0115] As shown in FIG. 9, in step S12, the allocation unit 320 allocates a screen operation function to the dial 12.

[0116] Next, in step S13, the display unit 22 temporarily displays a second function notification image 80 (FIG. 7(a)) indicating that a screen operation function has been allocated to the dial 12.

[0117] Next, in step S14, the display unit 22 continuously displays a function notification image 82 (FIG. 7(a)) indicating that a screen operation function has been allocated to the dial 12 for the period during which the screen operation function is allocated to the dial 12.

[0118] Next, in step S15, the light emitting unit 16 emits visible light of a second color indicating that a screen operation function has been allocated to the dial 12 at the base end portion 12A of the dial 12.

[0119] Next, in step S16, the backlight 18 lights up the allocation change switch 14A, the initial screen switch 14B, and the return switch 14C.

[0120] Next, in step S17, the display control unit 265 operates (controls) the screen of the display unit 22 based on the rotation operation information and pressing operation information of the dial 12, the operation information of the initial screen switch 14B, the operation information of the return switch 14C, and the operation information of the push buttons 24A to 24F. Step S17 corresponds to an example of "a step in which the dial receives a rotation operation".

[0121] Next, in step S18, the allocation unit 320 determines whether the allocation change switch 14A has been pressed based on the operation information of the allocation change switch 14A.

[0122] If it is determined in step S18 that the allocation change switch 14A has not been pressed, the process proceeds to step S17.

[0123] On the other hand, if it is determined in step S18 that the allocation change switch 14A has been pressed, the process proceeds to step S3 in FIG. 8.

[0124] As described above with reference to FIGS. 8 and 9, according to the operation control method according to the present embodiment, either the engine operation function for adjusting the rotational speed of the engine 501 or the screen operation function for performing an operation according to the screen displayed on the display unit 22 is selectively assigned to the dial 12 (steps S3, S12). Therefore, by executing the operation control method in the work vehicle 100, compared with the case of providing a dedicated dial for adjusting the rotational speed of the engine 501 and a dedicated dial for performing an operation according to the screen displayed on the display unit 22, respectively, while suppressing an increase in the number of parts of the operation device 1, the operability of the operation device 1 can be improved by the dial 12.

[0125] Next, with reference to FIGS. 4 and 10, an example of screen transition on the display unit 22 will be described. FIG. 10 is a diagram showing an example of screen transition on the display unit 22.

[0126] As shown in FIG. 10, the display unit 22 displays the first setting screen SCB under the control of the display control unit 265. The first setting screen SCB includes a plurality of item selection units 85 and a cursor CS. In FIG. 10, the cursor CS is indicated by hatching. The item selection unit 85 is an area for selecting an item to be set for the operation unit 20.

[0127] Hereinafter, in the description of FIG. 10 and FIG. 11 described later, the push button 24F (FIG. 3) corresponding to the selected unit 66F indicating "determine" may be described as the "determine button 24F", and the push button 24A (FIG. 3) corresponding to the selected unit 66A indicating "return" may be described as the "return button 24A".

[0128] First, the case where a screen operation function is assigned to the dial 12 will be described. In this case, for the sake of simplicity, mainly attention is paid only to the operation by the dial operation unit 10. Specifically, the display unit 22 operates as follows under the control of the display control unit 265.

[0129] That is, the display unit 22 moves the cursor CS on the plurality of item selection units 85 in response to the rotation operation of the dial 12. In the example of FIG. 10, the cursor CS is positioned on the item selection unit 85 indicating "date and time setting". Therefore, the item selection unit 85 indicating "date and time setting" is selected.

[0130] Then, when the dial 12 is pressed, the selection of the item selection unit 85 is confirmed. As a result, the display unit 22 changes the first setting screen SCB to the second setting screen SCC corresponding to the item indicated by the item selection unit 85. That is, the display unit 22 causes a transition from the first setting screen SCB to the second setting screen SCC.

[0131] The second setting screen SCC includes a plurality of numerical input units 87, a plurality of icons 89, and a cursor CS. The numerical input unit 87 is an area for inputting numerical values. A pair of icons 89 are arranged for each numerical input unit 87.

[0132] The display unit 22 moves the cursor CS over a plurality of numerical input units 87 in accordance with the rotation operation of the dial 12. In the example of FIG. 10, the cursor CS is positioned on the numerical input unit 87 in which "20" has been input. Therefore, the numerical input unit 87 in which "20" has been input is selected.

[0133] On the other hand, on the second setting screen SCC, the display unit 22 does not execute the change of the numerical value of the numerical input unit 87 by the rotation operation of the dial 12. The icon 89 visually indicates that the numerical value of the numerical input unit 87 cannot be changed by the rotation operation of the dial 12. On the second setting screen SCC, the rotation operation of the dial 12 is accepted only for selecting one numerical input unit 87 from a plurality of numerical input units 87.

[0134] When the dial 12 is pressed, the display unit 22 changes the second setting screen SCC to the third setting screen SCD. That is, the display unit 22 causes a transition from the second setting screen SCC to the third setting screen SCD.

[0135] The configuration of the third setting screen SCD is the same as that of the second setting screen SCC. However, on the third setting screen SCD, the display unit 22 executes the change of the numerical value by the rotation operation of the dial 12 in the selected numerical input unit 87. Also, on the third setting screen SCD, a pair of icons 89A sandwiching the selected numerical input unit 87 visually indicates that the numerical value of the numerical input unit 87 can be changed by the rotation operation of the dial 12.

[0136] Also, on the third setting screen SCD, the display unit 22 can also execute the change of the numerical value in the selected numerical input unit 87 in accordance with the operations of the push buttons 24C, 24D (FIG. 3) corresponding to the selected portions 66C, 66D.

[0137] When the dial 12 is pressed or the return switch 14C (FIG. 2(b)) of the dial operation unit 10 is pressed, the display unit 22 changes the third setting screen SCD to the second setting screen SCC. That is, the display unit 22 causes a transition from the third setting screen SCD to the second setting screen SCC.

[0138] Furthermore, when the return switch 14C of the dial operation unit 10 is pressed, the display unit 22 changes the second setting screen SCC to the first setting screen SCB. That is, the display unit 22 causes a transition from the second setting screen SCC to the first setting screen SCB.

[0139] Next, the case where the engine operation function is assigned to the dial 12 will be described. In this case, the display unit 22 operates as follows under the control of the display control unit 265.

[0140] The display unit 22 moves the cursor CS over the plurality of item selection units 85 in response to operations of the push buttons 24B to 24E (FIG. 3) corresponding to the selected units 66B to 66E.

[0141] Then, when the determination button 24F is pressed, the selection of the item selection unit 85 is confirmed. As a result, the display unit 22 changes the first setting screen SCB to the second setting screen SCC. That is, the display unit 22 causes a transition from the first setting screen SCB to the second setting screen SCC.

[0142] On the second setting screen SCC, the display unit 22 moves the cursor CS over the plurality of numerical input units 87 in response to operations of the push buttons 24B and 24E (FIG. 3) corresponding to the selected units 66B and 66E.

[0143] In addition, on the second setting screen SCC, the display unit 22 executes a change in the numerical value in the selected numerical input unit 87 in response to operations of the push buttons 24C and 24D (FIG. 3) corresponding to the selected units 66C and 66D. Therefore, when the engine operation function is assigned to the dial 12, the display unit 22 does not execute a change from the second setting screen SCC to the third setting screen SCD. That is, when the engine operation function is assigned to the dial 12, the display unit 22 does not display the third setting screen SCD.

[0144] When the return button 24A is pressed, the display unit 22 changes the second setting screen SCC to the first setting screen SCB. That is, the display unit 22 causes a transition from the second setting screen SCC to the first setting screen SCB.

[0145] Even when a screen operation function is assigned to the dial 12, the push buttons 24A to 24F (FIG. 3) have the same functions in the first setting screen SCB and the second setting screen SCC as when an engine operation function is assigned to the dial 12, and the display unit 22 displays a screen in response to the operation of the push buttons 24A to 24F.

[0146] As described above with reference to FIG. 10, according to the present embodiment, when a screen operation function is assigned to the dial 12, during the period in which the second setting screen SCC for inputting or setting information (hereinafter referred to as "information F1") is being displayed, in response to the dial 12 receiving a pressing operation, the display unit 22 changes the second setting screen SCC to a third setting screen SCD for inputting or setting the information F1. On the other hand, when an engine operation function is assigned to the dial 12, the change from the second setting screen SCC to the third setting screen SCD is not executed. The second setting screen SCC corresponds to an example of the "first screen", and the third setting screen SCD corresponds to an example of the "second screen".

[0147] That is, when a screen operation function is assigned to the dial 12, a dedicated third setting screen SCD for inputting or setting the information F1 is additionally prepared as compared with the case where an engine operation function is assigned to the dial 12. Therefore, even when the degree of freedom of operation of the dial operation unit 10 is smaller than the degree of freedom of operation of the operation unit 20, at least the second setting screen SCC can be shared between the case where a screen operation function is assigned to the dial 12 and the case where an engine operation function is assigned to the dial 12. As a result, the operability of the screen by the operator can be improved.

[0148] Specifically, in the example of FIG. 2(b), the degree of freedom of operation of the dial operation unit 10 is "4". That is, as the degree of freedom of operation of the dial operation unit 10, there are a clockwise rotation operation of the dial 12, a counterclockwise rotation operation, a pressing operation, and a pressing operation of the return switch 14C. Further, in the example of FIG. 3, the degree of freedom of operation of the operation unit 20 is "6". That is, as the degree of freedom of operation of the operation unit 20, there is a pressing operation of each of the six push buttons 24A to 24F. In the present embodiment, the fact that the degree of freedom of operation of the dial operation unit 10 is smaller than the degree of freedom of operation of the operation unit 20 is compensated for by additionally preparing the third setting screen SCD when a screen operation function is assigned to the dial 12.

[0149] Next, with reference to FIGS. 4, 10, and 11, a first screen control method in the case of performing the screen transition shown in FIG. 10 will be described. FIG. 11 is a flowchart showing the first screen control method executed in the work vehicle 100 (operation device 1). The first screen control method is a screen control method when a screen operation function is assigned to the dial 12. Further, for the sake of simplicity of explanation, the assignment change switch 14A and the initial screen switch 14B are not operated. As shown in FIG. 11, the first screen control method includes steps S31 to S39.

[0150] In step S31, the display unit 22 displays the first setting screen SCB under the control of the display control unit 265.

[0151] Next, in step S32, the display control unit 265 operates (controls) the first setting screen SCB displayed on the display unit 22 based on the rotation operation information and pressing operation information of the dial 12, the operation information of the return switch 14C, and the operation information of the push buttons 24A to 24F.

[0152] Next, in step S33, the display control unit 265 determines whether the dial 12 has been pressed based on the pressing operation information of the dial 12. In addition, the display control unit 265 determines whether the decision button 24F has been pressed based on the operation information of the decision button 24F.

[0153] If a negative determination is made in step S33, the process proceeds to step S32. The negative determination indicates that it is determined that the dial 12 has not been pressed and the enter button 24F has not been pressed.

[0154] On the other hand, if an affirmative determination is made in step S33, the process proceeds to step S34. The affirmative determination indicates that it is determined that the dial 12 has been pressed or the enter button 24F has been pressed.

[0155] In step S34, the display unit 22 displays the second setting screen SCC under the control of the display control unit 265.

[0156] Next, in step S35, the display control unit 265 operates (controls) the second setting screen SCC displayed on the display unit 22 based on the rotation operation information and pressing operation information of the dial 12, the operation information of the return switch 14C, and the operation information of the push buttons 24A to 24E.

[0157] Next, in step S36, the display control unit 265 determines whether the dial 12 has been pressed based on the pressing operation information of the dial 12.

[0158] If it is determined in step S36 that the dial 12 has not been pressed, the process proceeds to step S40.

[0159] In step S40, the display control unit 265 determines whether the return switch 14C or the return button 24A has been pressed based on the operation information of the return switch 14C and the return button 24A.

[0160] If it is determined in step S40 that the return switch 14C and the return button 24A have not been pressed, the process proceeds to step S35.

[0161] On the other hand, if it is determined in step S40 that the return switch 14C or the return button 24A has been pressed, the process proceeds to step S31.

[0162] Also, when it is determined in step S36 that the dial 12 has been pressed, the process proceeds to step S37.

[0163] In step S37, the display unit 22 displays the third setting screen SCD under the control of the display control unit 265.

[0164] Next, in step S38, the display control unit 265 operates (controls) the third setting screen SCD displayed on the display unit 22 based on the rotation operation information and pressing operation information of the dial 12, the operation information of the return switch 14C, and the operation information of the push buttons 24A, 24C, and 24D.

[0165] Next, in step S39, the display control unit 265 determines whether the dial 12 has been pressed based on the pressing operation information of the dial 12. In addition, the display control unit 265 determines whether the return switch 14C or the return button 24A has been pressed based on the operation information of the return switch 14C and the return button 24A.

[0166] If a negative determination is made in step S39, the process proceeds to step S38. The negative determination indicates that it has been determined that the dial 12 has not been pressed and that the return switch 14C and the return button 24A have not been pressed.

[0167] On the other hand, if an affirmative determination is made in step S39, the process proceeds to step S34. The affirmative determination indicates that it has been determined that the dial 12 has been pressed, the return switch 14C has been pressed, or the return button 24A has been pressed.

[0168] Note that in the screen control method when an engine operation function is assigned to the dial 12, steps S36 to S39 are not executed, and step S40 is executed after step S35. Also, in this case, in the screen control method, the screen is not operated by the dial operation unit 10, and the screen is operated only by the push buttons 24A to 24F.

[0169] Next, with reference to FIGS. 4 and 12, another example of screen transition on the display unit 22 will be described. FIG. 12 is a diagram showing another example of screen transition on the display unit 22.

[0170] As shown in FIG. 12, the display unit 22 displays the first function operation screen SCE under the control of the display control unit 265. The first function operation screen SCE is a screen for receiving operations for executing functions related to the work vehicle 100. The work vehicle 100 corresponds to an example of a "machine".

[0171] The first function operation screen SCE includes a plurality of item selection parts 95 and a cursor CS. In FIG. 12, the cursor CS is indicated by hatching. The item selection part 95 is an area for selecting major items of functions related to the work vehicle 100.

[0172] Hereinafter, in the description of FIGS. 12 and FIGS. 13 and 14 to be described later, the push button 24F (FIG. 3) corresponding to the selected part 66F indicating "determine" or "reset" may be described as the "determine button 24F", and the push button 24A (FIG. 3) corresponding to the selected part 66A indicating "return" may be described as the "return button 24A".

[0173] A case where a screen operation function is assigned to the dial 12 will be described. In this case, for the sake of simplicity of explanation, mainly attention is paid only to the operation by the dial operation unit 10. Specifically, the display unit 22 operates as follows under the control of the display control unit 265.

[0174] That is, the display unit 22 moves the cursor CS on the plurality of item selection parts 95 in response to the rotation operation of the dial 12. In the example of FIG. 12, the cursor CS is positioned at the item selection part 95 indicating "time confirmation and reset". Therefore, the item selection part 95 indicating "time confirmation and reset" is selected.

[0175] When the dial 12 is pressed, the selection of the item selection unit 95 is confirmed. As a result, the display unit 22 changes the first function operation screen SCE to a second function operation screen SCF corresponding to the item indicated by the item selection unit 95. That is, the display unit 22 causes a transition from the first function operation screen SCE to the second function operation screen SCF.

[0176] The second function operation screen SCF is a screen for receiving operations for executing functions related to the work vehicle 100. The second function operation screen SCF includes a plurality of item selection units 97, a plurality of target display units 98, and a cursor CS. The item selection unit 97 is an area for selecting sub-items of functions related to the work vehicle 100. The plurality of target display units 98 are arranged corresponding to the plurality of item selection units 97 respectively. The target display unit 98 displays an execution target of the function indicated by the item selection unit 97.

[0177] The display unit 22 moves the cursor CS on the plurality of item selection units 97 in accordance with the rotation operation of the dial 12. In the example of FIG. 12, the cursor CS is positioned on the item selection unit 97 indicating "engine oil". Therefore, the item selection unit 97 indicating "engine oil" is selected.

[0178] When the dial 12 is pressed, the display unit 22 changes the second function operation screen SCF to a third function operation screen SCG. That is, the display unit 22 causes a transition from the second function operation screen SCF to the third function operation screen SCG.

[0179] The third function operation screen SCG is a screen for receiving operations for executing functions related to the work vehicle 100. The configuration of the third function operation screen SCG is the same as the configuration of the second function operation screen SCF. However, the third function operation screen SCG includes a message image 101. In the example of FIG. 12, the message image 101 is displayed superimposed on the plurality of item selection units 97 and the plurality of target display units 98. The message image 101 includes information indicating the content of the function to be executed and information indicating the final confirmation of the execution of the function.

[0180] Also, on the third function operation screen SCG, the cursor CS is disabled. Therefore, on the third function operation screen SCG, the position of the cursor CS cannot be changed.

[0181] Furthermore, in response to the transition from the second function operation screen SCF to the third function operation screen SCG, the display unit 22 displays the cursor CSX in the selected area 65 of the third function operation screen SCG. Specifically, in response to the transition from the second function operation screen SCF to the third function operation screen SCG, the display unit 22 displays the cursor CSX in the selected parts 66A to 66E different from the selected part 66F indicating "OK". In the example of FIG. 12, the display unit 22 displays the cursor CSX in the selected part 66A indicating "Back".

[0182] Then, on the third function operation screen SCG, the display unit 22 moves the cursor CSX over the plurality of selected parts 66A to 66F in response to the rotation operation of the dial 12.

[0183] Furthermore, when the cursor CSX is located in the selected part 66F indicating "OK" and the selected part 66F is selected, if the dial 12 is pressed, the control unit 261 of the display control device 26 or the control unit 32 of the main control device 30 executes the functions indicated by the item selection units 95 and 97. In the example of FIG. 12, the information displayed on the target display unit 98 is changed (for example, reset). The display unit 22 displays the execution result of the function.

[0184] On the other hand, on the third function operation screen SCG, when the cursor CSX is located in the selected part 66A indicating "Back" and the dial 12 is pressed, the display unit 22 changes the third function operation screen SCG to the second function operation screen SCF. That is, the display unit 22 causes a transition from the third function operation screen SCG to the second function operation screen SCF. Therefore, even when the operator rapidly presses the dial 12 to cause a direct transition from the first function operation screen SCE to the third function operation screen SCG, it is possible to prevent a function from being executed inadvertently due to excessive momentum. Note that rapid pressing means continuously repeating the pressing operation of the dial 12.

[0185] Even when the screen operation function is assigned to the dial 12 or when the engine operation function is assigned, on the first function operation screen SCE to the third function operation screen SCG, operations corresponding to the selected portions 66A to 66F of the selected area 65 can be performed by the push buttons 24A to 24F.

[0186] As described above with reference to FIG. 12, according to the present embodiment, while the screen displayed on the display unit 22 is changed from the second function operation screen SCF to the third function operation screen SCG in response to the pressing operation of the dial 12 and the third function operation screen SCG is being displayed on the display unit 22, if a pressing operation is received again before the dial 12 accepts a rotational operation, the display unit 22 changes the third function operation screen SCG to the second function operation screen SCF. Therefore, it is possible to prevent the functions indicated by the item selection units 95 and 97 from being executed due to excessive momentum caused by continuous pressing of the dial 12 by the operator. The second function operation screen SCF corresponds to an example of the "third screen", and the third function operation screen SCG corresponds to an example of the "fourth screen".

[0187] Next, with reference to FIGS. 4 and 12 to 14, a second screen control method when performing the screen transition shown in FIG. 12 will be described. FIGS. 13 and 14 are flowcharts showing the second screen control method executed in the work vehicle 100 (operation device 1). The second screen control method is a screen control method when the screen operation function is assigned to the dial 12. Also, for the sake of simplicity of explanation, the assignment change switch 14A and the initial screen switch 14B are not operated. As shown in FIGS. 13 and 14, the second screen control method includes steps S51 to S63.

[0188] In step S51, the display unit 22 displays the first function operation screen SCE under the control of the display control unit 265.

[0189] Next, in step S52, the display control unit 265 operates (controls) the first function operation screen SCE displayed on the display unit 22 based on the rotation operation information and pressing operation information of the dial 12, the operation information of the return switch 14C, and the operation information of the push buttons 24A to 24C and 24F.

[0190] Next, in step S53, the display control unit 265 determines whether the dial 12 has been pressed based on the pressing operation information of the dial 12. In addition, the display control unit 265 determines whether the decision button 24F has been pressed based on the operation information of the decision button 24F.

[0191] If the determination in step S53 is negative, the process proceeds to step S52. The negative determination indicates that it has been determined that the dial 12 has not been pressed and the decision button 24F has not been pressed.

[0192] On the other hand, if the determination in step S53 is positive, the process proceeds to step S54. The positive determination indicates that it has been determined that the dial 12 has been pressed or the decision button 24F has been pressed.

[0193] In step S54, the display unit 22 displays the second function operation screen SCF under the control of the display control unit 265.

[0194] Next, in step S55, the display control unit 265 operates (controls) the second function operation screen SCF displayed on the display unit 22 based on the rotation operation information and pressing operation information of the dial 12, the operation information of the return switch 14C, and the operation information of the push buttons 24A to 24C and 24F.

[0195] Next, in step S56, the display control unit 265 determines whether the dial 12 has been pressed based on the pressing operation information of the dial 12. In addition, the display control unit 265 determines whether the decision button 24F has been pressed based on the operation information of the decision button 24F.

[0196] If a negative determination is made in step S56, the process proceeds to step S55. The content of the negative determination is the same as the content of the negative determination in step S53.

[0197] On the other hand, if an affirmative determination is made in step S56, the process proceeds to step S57 in FIG. 14. The content of the affirmative determination is the same as the content of the affirmative determination in step S53.

[0198] As shown in FIG. 14, in step S57, the display unit 22 displays the third function operation screen SCG under the control of the display control unit 265. In this case, the display unit 22 invalidates the cursor CS and displays the cursor CSX on the selected portion 66A indicating "return".

[0199] Next, in step S58, the display control unit 265 determines whether the dial 12 has rotated based on the rotation operation information of the dial 12.

[0200] If it is determined in step S58 that the dial 12 has rotated, the process proceeds to step S61.

[0201] On the other hand, if it is determined in step S58 that the dial 12 has not rotated, the process proceeds to step S59.

[0202] In step S59, the display control unit 265 determines whether the dial 12 has been pressed based on the pressing operation information of the dial 12.

[0203] If it is determined in step S59 that the dial 12 has been pressed, the process proceeds to step S54 in FIG. 13. As a result, the screen displayed on the display unit 22 returns from the third function operation screen SCG to the second function operation screen SCF.

[0204] On the other hand, if it is determined in step S59 that the dial 12 has not been pressed, the process proceeds to step S60.

[0205] In step S60, the display control unit 265 determines whether the dial 12 has rotated based on the rotation operation information of the dial 12.

[0206] If it is determined in step S60 that the dial 12 has not rotated, the process waits until the dial 12 rotates.

[0207] On the other hand, if it is determined in step S60 that the dial 12 has rotated, the process proceeds to step S61.

[0208] In step S61, the display control unit 265 determines whether the dial 12 has been pressed while the cursor CSX is positioned at the selected portion 66F indicating "Determine". In addition, the display control unit 265 determines whether the determination button 24F corresponding to the selected portion 66F indicating "Determine" has been pressed.

[0209] If a negative determination is made in step S61, the process proceeds to step S63. The content of the negative determination is the same as the content of the negative determination in step S53.

[0210] In step S63, the display control unit 265 determines whether the dial 12 has been pressed while the cursor CSX is positioned at the selected portion 66A indicating "Return". In addition, the display control unit 265 determines whether the return button 24A or the return switch 14C corresponding to the selected portion 66A indicating "Return" has been pressed.

[0211] If a negative determination is made in step S63, the process proceeds to step S60. The negative determination indicates that it has been determined that the dial 12 has not been pressed and that the return button 24A and the return switch 14C have not been pressed.

[0212] On the other hand, if an affirmative determination is made in step S63, the process proceeds to step S54 in FIG. 13. The affirmative determination indicates that it has been determined that the dial 12 has been pressed, the return button 24A has been pressed, or the return switch 14C has been pressed.

[0213] Also, when an affirmative determination is made in step S61, the process proceeds to step S62. The content of the affirmative determination is the same as the content of the affirmative determination in step S53.

[0214] In step S62, the control unit 261 of the display control device 26 or the control unit 32 of the main control device 30 executes the functions indicated by the item selection units 95 and 97. The display unit 22 displays the execution result of the function under the control of the display control unit 265. Then, the process ends.

[0215] The embodiments and examples of the present invention have been described above with reference to the drawings. However, the present invention is not limited to the above-described embodiments, and can be implemented in various modes without departing from the gist thereof. For example, the following modifications (1) to (5) are possible. Also, a plurality of components disclosed in the above embodiments can be modified as appropriate. For example, a certain component among all the components shown in a certain embodiment may be added to the components of another embodiment, or some of the components among all the components shown in a certain embodiment may be deleted from the embodiment.

[0216] Also, the drawings schematically show each component mainly for easy understanding of the invention, and the thickness, length, number, interval, etc. of each illustrated component may be different from the actual ones for convenience in drawing preparation. Also, the configuration of each component shown in the above embodiments is an example and is not particularly limited, and it goes without saying that various changes can be made without substantially departing from the effects of the present invention.

[0217] (1) In FIGS. 8 and 9, steps S4 to S6, S9, and S13 to S16 are preferred examples of the present invention and are not essential. For example, one or two of steps S4 to S6 may be executed, or one, two, or three of steps S13 to S16 may be executed.

[0218] Also, the order of steps S4 to S6 is not particularly limited and may be in any order or may be executed in parallel. The order of steps S13 to S16 is not particularly limited and may be in any order or may be executed in parallel.

[0219] Furthermore, the labels LB1 and LB2 in FIG. 2(b) are preferred examples of the present invention and are not essential. Also, the operating device 1 may have one of the labels LB1 and LB2.

[0220] (2) In FIG. 4, although the allocation unit 320 and the display control unit 265 are included in separate control devices (main control device 30, display control device 26), they may be included in the same control device. Also, the main control device 30 that realizes the allocation unit 320 and the display control device 26 that realizes the display control unit 265 are an example, and the allocation unit 320 and the display control unit 265 can be realized by any computer.

[0221] (3) The operation unit 20 in FIG. 1 may be fixed to the cab 205 or may be detachable from the cab 205. Also, the operation unit 20 may be a mobile communication terminal such as a smartphone and a tablet.

[0222] (4) The display unit 22 may display an error screen including error information of the work vehicle 100. And when stopping the buzzer according to the error, regardless of the function assigned to the dial 12, by pressing the push button 24 corresponding to the buzzer stop among the push buttons 24A to 24F, the buzzer is stopped.

[0223] (5) In the present embodiment described with reference to FIGS. 1 to 14, as an example of the work vehicle 100, a hydraulic excavator was cited as an example. However, as long as the rotation speed of the engine 501 is adjusted by the dial 12, the work vehicle 100 is not limited to a hydraulic excavator, and for example, it may be other construction machinery or agricultural machinery. The construction machinery is, for example, a loader such as a wheel loader or a carrier. The agricultural machinery is, for example, a ride-on tractor, a ride-on combine, or a ride-on rice transplanter.

Industrial Applicability

[0224] The present invention relates to an operating device, a work vehicle, and an operation control method, and has industrial applicability.

Explanation of Signs

[0225] 1 Operating device 12 Dial 14A Assignment change switch 14B Initial screen switch (operator) 14C Return switch (operator) 16 Light emitting unit (function notification unit) 18 Backlight (function notification unit) 22 Display unit 70 First function notification image (first function notification information) 75 Rotation speed image (rotation speed information) 80 Second function notification image (second function notification information) 82 Function notification image (function notification information) 100 Work vehicle 265 Display control unit (function notification unit) 300 Work implement 320 Assignment unit LB1, LB2 Mark SCC Second setting screen (first screen) SCD Third setting screen (second screen) SCF Second function operation screen (third screen) SCG Third function operation screen (fourth screen)

Claims

1. A dial that accepts a rotation operation, A display unit, An engine operation function for adjusting the engine speed, and a control unit that selectively assigns either the engine operation function or a screen operation function for performing a selection operation on an image of a screen displayed on the display unit, regardless of the screen displayed on the display unit, in accordance with the operation information of an assignment change switch, to the rotation operation, The control unit is an operating device that assigns the engine operation function to the rotation operation in response to the key switch for starting the engine being turned on.

2. The operating device according to claim 1, further comprising a function notification unit that notifies, in a recognizable manner by lighting, which of the engine operation function and the screen operation function is assigned to the rotation operation.

3. The operating device according to claim 2, wherein the function notification unit notifies, in a recognizable manner by lighting, the function assigned to the rotation operation on the dial or adjacent to the dial.

4. The operating device according to claim 2 or claim 3, wherein the function notification unit emits visible light of different colors at the base end of the dial when the engine operation function is assigned to the rotation operation and when the screen operation function is assigned to the rotation operation.

5. The function notification unit controls the display unit to temporarily display first function notification information in response to the engine operation function being assigned to the rotation operation, The first function notification information indicates that the engine operation function is assigned to the rotation operation, The function notification unit controls the display unit to temporarily display second function notification information in response to the screen operation function being assigned to the rotation operation, The operating device according to claim 2, wherein the second function notification information indicates that the screen operation function is assigned to the rotation operation.

6. The function notification unit controls the display unit to display function notification information indicating that the screen operation function is assigned to the rotation operation for the period during which the screen operation function is assigned to the rotation operation. The operating device according to claim 2 or claim 5.

7. The display unit temporarily displays rotation speed information indicating the rotation speed of the engine in response to the rotation operation of the dial when the engine operation function is assigned to the rotation operation. The operating device according to any one of claims 1 to 6.

8. The rotation operation has a sign indicating that it has the engine operation function, The sign is disposed adjacent to the dial or on the dial. The operating device according to any one of claims 1 to 7.

9. Further includes an operator disposed adjacent to the dial and receiving an operation, When the screen operation function is assigned to the rotation operation, the operation of the operator is valid, When the engine operation function is assigned to the rotation operation, the operation of the operator is invalid. The operating device according to any one of claims 1 to 8.

10. When the screen operation function is assigned to the rotation operation, during the period when the first screen displayed on the display unit is being displayed, in response to the dial receiving a pressing operation, the display unit changes the first screen to a second screen that is a screen different from the first screen, When the engine operation function is assigned to the rotation operation, the change from the first screen to the second screen is not executed. The operating device according to any one of claims 1 to 9.

11. The operating device according to any one of claims 1 to 10, A work machine that executes work A work vehicle comprising.

12. An operation control method executed in an operating device including a dial and a display unit, An assignment step of selectively assigning any one of an engine operation function for adjusting the rotation speed of the engine and a screen operation function for performing a selection operation on an image of a screen displayed on the display unit to the rotation operation of the dial according to the operation information of an assignment change switch regardless of the screen displayed on the display unit, A reception step of the dial receiving the rotation operation, and includes, In the assignment step, the engine operation function is assigned to the rotation operation in response to the key switch for starting the engine being turned on. An operation control method.

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