Work machine operation device, work vehicle, operation control method

Abstract

To provide an operation device capable of improving operability while suppressing an increase in the number of components.SOLUTION: An operation device 1 of a work machine comprises a dial 12, a display section 22 and a display control section 265. The dial 12 receives rotational operation. When a setting of the dial 12 is changed, the display control section 265 controls the display section 22 to temporarily display notification information relating to the changed setting.SELECTED DRAWING: Figure 4

Description

[Technical Field]

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

[0002] The work machine described in Patent Document 1 includes a display device and a jog dial. The jog dial operates display items displayed on the display device. The display device and the jog dial are located close together and within the same field of view of an operator seated in the driver's seat. Therefore, the operator can operate the jog dial while looking at the display device, making it easy to operate the display device intuitively. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-116754 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the work machine described in Patent Document 1 requires another jog dial for adjusting the engine speed in addition to the jog dial, which increases the number of parts.

[0005] The present invention has been made in consideration of the above-mentioned problems, and its object 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 problem]

[0006] A working machine operating device according to one aspect of the present invention includes a dial, a display unit, and a notification unit. The dial is rotated. When a setting of the dial is changed, the notification unit controls the display unit to temporarily display notification information related to the changed setting.

[0007] A work vehicle according to one aspect of the present invention includes an operation device for the work machine and a work implement that performs work.

[0008] An operation control method according to one aspect of the present invention is an operation control method executed in an operating device of a work machine that has a dial and a display unit, and includes the steps of: causing the dial to accept a rotation operation; and, when the setting of the dial is changed, controlling the display unit to temporarily display notification information regarding the changed setting. [Effects 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 explanation of the drawings]

[0010] [Figure 1] 1 is a perspective view showing an upper rotating body of a work vehicle according to an embodiment of the present invention. [Figure 2] 1A is a perspective view showing a dial operation unit of the work vehicle according to the present embodiment, and FIG. 1B is a plan view showing the dial operation unit of the work vehicle according to the present embodiment. [Figure 3] 2 is a diagram showing a display unit and a plurality of push buttons of the work vehicle according to the present embodiment. FIG. [Figure 4] 1 is a block diagram showing a work vehicle according to a first embodiment of the present invention. [Figure 5]1A is a diagram showing a first function notification image displayed in response to an engine operation function being assigned to a dial of the work vehicle according to this embodiment, and FIG. 1B is a diagram showing the lighting state of the dial operation unit when an engine operation function is assigned to the dial of the work vehicle according to this embodiment. [Figure 6] 10A and 10B are diagrams showing rotation speed images that are displayed in response to operation of a dial when an engine operation function is assigned to the dial of the work vehicle according to the present embodiment; [Figure 7] 1A is a diagram showing a second function notification image displayed in response to a screen operation function being assigned to a dial of the work vehicle according to this embodiment, and FIG. 1B is a diagram showing the lighting state of the dial operation unit when a screen operation function is assigned to the dial of the work vehicle according to this embodiment. [Figure 8] 3 is a flowchart showing a part of an operation control method executed in the work vehicle according to the present embodiment. [Figure 9] 10 is a flowchart showing another part of the operation control method executed in the work vehicle according to the present embodiment. [Figure 10] 5A to 5C are diagrams showing an example of screen transitions on the display unit of the work vehicle according to the present embodiment. [Figure 11] 4 is a flowchart showing a first screen control method executed in the work vehicle according to the present embodiment. [Figure 12] 10A and 10B are diagrams illustrating another example of screen transitions on the display unit of the work vehicle according to the present embodiment. [Figure 13] 6 is a flowchart showing a part of a second screen control method executed in the work vehicle according to the present embodiment. [Figure 14] 10 is a flowchart showing another part of the second screen control method executed in the work vehicle according to the present embodiment. DETAILED DESCRIPTION OF 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 designated by the same reference characters and description thereof will not be repeated.

[0012] First, a work vehicle 100 according to an embodiment of the present invention will be described with reference to Figure 1. Hereinafter, this embodiment will be described using an example in which the work vehicle 100 is a hydraulic excavator. A hydraulic excavator is an example of construction machinery.

[0013] Fig. 1 is a perspective view showing an upper rotating body 200 of a work vehicle 100 according to this embodiment. Note that in Fig. 1, the roof of the upper rotating body 200 is omitted to make the drawing easier to see.

[0014] As shown in Figure 1, the work vehicle 100 is equipped with an upper rotating body 200. The upper rotating body 200 rotates relative to a lower traveling body 400 (see Figure 4 below). The upper rotating body 200 is driven to rotate by a hydraulic pump 600 (see Figure 4 below) and a hydraulic motor (not shown). A work implement 300 (see Figure 4 below) is attached to the upper rotating body 200.

[0015] Specifically, the upper rotating body 200 includes an operating device 1, a cockpit 205, a seat 210, a plurality of operating levers 220, and a positioning member 230.

[0016] In the cockpit 205, an operating device 1, a seat 210, a plurality of operating levers 220, and a positioning member 230 are arranged. An operator sits in the seat 210. The operator is the operator of the work vehicle 100. Each of the plurality of operating levers 220 accepts operation from the operator. The operating levers 220 are operating members for operating the work vehicle 100.

[0017] The operation device 1 receives operations from an operator and operates the work vehicle 100, inputs various information to the work vehicle 100, and displays various information related to 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 accepts a rotation operation from the operator. Preferably, the dial operation unit 10 accepts a pressing operation from the operator. The dial operation unit 10 is arranged on a placement member 230. As long as the dial operation unit 10 can be arranged on the placement member 230, the shape and structure of the placement member 230 are not particularly limited.

[0019] Specifically, the dial operation unit 10 includes a dial 12. Preferably, the dial operation unit 10 further includes at least one switch 14. In this embodiment, the dial operation unit 10 includes a plurality of switches 14 (for example, three switches 14). The switches 14 are arranged next to the dial 12 and receive operations 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 "operator" or a "first operator."

[0020] The operation unit 20 displays various types of information and accepts pressing operations from the operator. The operation unit 20 includes a display unit 22 and at least one push button 24. In this 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 operator." The display unit 22 displays various types of information related to the work vehicle 100. For example, the display unit 22 displays the status of the work vehicle 100, a GUI (Graphical User Interface), or camera images. The display unit 22 is, for example, a liquid crystal display or an organic electroluminescence display. The display unit 22 may also include a touch panel. In this case, each push button 24 may be displayed on the display unit 22 as a GUI widget.

[0021] Next, the dial operation unit 10 will be described with reference to Figures 2(a) and 2(b). Figure 2(a) is a perspective view showing the dial operation unit 10. Figure 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. The 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 that is held by the operator, a rotation axis, and a rotation sensor that detects the amount of rotation of the dial body. The dial body has, for example, a substantially cylindrical shape with a bottom. The rotation sensor is, for example, a rotary encoder.

[0024] It is preferable that the dial 12 be operated not only by rotation but also by pressing from the operator, that is, it is preferable that the dial 12 also functions as a push button.

[0025] The dial 12 is selectively assigned either an engine operation function or a screen operation function. The engine operation function is a function for adjusting (controlling) the rotation speed of the engine 501 (see FIG. 4 described below). The screen operation function is a function for performing operations according to images displayed on the display unit 22. In other words, the screen operation function is a function for operating the screen displayed on the display unit 22.

[0026] According to this embodiment, the controller device 1 can adjust the rotation speed of the engine 501 and perform operations according to the screen displayed on the display unit 22 using one dial 12. As a result, compared to a case in which the controller device 1 is provided with a dial for adjusting the rotation speed of the engine 501 and a dial for performing operations according to the screen displayed on the display unit 22, the operability of the controller device 1 can be improved by the dial 12 while suppressing an increase in the number of parts of the controller device 1.

[0027] Furthermore, in this embodiment, the dial 12 is shared for both a rotation operation for adjusting the rotation speed of the engine 501 and a 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 rotation 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 near the operating lever 220, when an engine operating function is assigned to the dial 12, the operator can smoothly coordinate the rotation operation of the dial 12 with the operation of the operating lever 220.

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

[0029] Furthermore, switch 14B of the multiple switches 14 is an operator that instructs display of an initial screen SCA (FIG. 3 described below) on display unit 22. Therefore, by operating switch 14B, the operator can cause display unit 22 to immediately display the initial screen SCA. Control of switch 14B will be described later. Switch 14B has an icon 16B. Icon 16B indicates that switch 14B is an operator that causes display of the initial screen SCA.

[0030] Furthermore, switch 14C of the multiple switches 14 is an operator that instructs the display unit 22 to return from the screen currently being displayed to the previous screen. Therefore, the operator can easily display the previous screen on the display unit 22 by operating switch 14C. Control of switch 14C will be described later. Switch 14C has an icon 16C. Icon 16C indicates that switch 14C is an operator for returning to the previous screen.

[0031] In particular, the switches 14A to 14C are arranged next to the dial 12. This makes it easy for the operator to operate the dial 12 and the switches 14A to 14C. Furthermore, the switches 14A to 14C are arranged side by side in a fixed direction.

[0032] Hereinafter, the switch 14A, the switch 14B, and the switch 14C may be referred to as the allocation change switch 14A, the initial screen switch 14B, and the back switch 14C, respectively.

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

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

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

[0036] The marks LB1 and LB2 may be formed by, for example, engraving or painting.

[0037] Next, the display unit 22 and the push buttons 24 will be described with reference to Fig. 3. 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 an initial screen SCA. The initial screen SCA includes a time display area 50, an assigned function display area 52, an operating 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, an RPM display area 64, and a selected area 65.

[0038] The time display area 50 displays the time. The assigned function display area 52 displays information indicating the function assigned to the dial 12. Details of the assigned function display area 52 will be described later. The operating time display area 54 displays the operating time of the work vehicle 100. The fuel information display area 56 displays information regarding the fuel of the engine 501. For example, the fuel information display area 56 displays the remaining amount of fuel in the engine 501 and the available operating time. The camera image display area 58 displays an image from the backup camera mounted on the work vehicle 100. The icon display area 60 displays various icons indicating the status of each function and part of the work vehicle 100. The optional information display area 62 displays optional information regarding the work vehicle 100. The rotation speed display area 64 displays the rotation speed of the engine 501.

[0039] The selectable area 65 is an area for selection by the operator. Specifically, the selectable area 65 includes at least one selectable portion 66. In this embodiment, the selectable area 65 includes a plurality of selectable portions 66 (for example, six selectable portions 66). The plurality of selectable portions 66 are arranged in a straight line. The selectable portions 66 are, for example, objects. For example, functions related to screen operation or functions related to settings for the work vehicle 100 are assigned to some or all of the plurality of selectable portions 66. In the example of FIG. 3, functions corresponding to the initial screen SCA are assigned to each selectable portion 66, but when another screen is displayed on the display unit 22, functions corresponding to the screen are assigned to each selectable portion 66. When the selection of one selectable portion 66 on the initial screen SCA is confirmed, the display unit 22 displays a screen corresponding to the function assigned to the selectable portion 66.

[0040] Furthermore, the plurality of push buttons 24 are arranged corresponding to the plurality of selected portions 66. 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, 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 selection target unit 66 corresponding to the push button 24 is confirmed.

[0042] On the other hand, when a screen operation function is assigned to the dial 12, operation of the display unit 22 by the dial operation unit 10 is permitted. Accordingly, in this case, the display unit 22 displays a cursor (hereinafter referred to as "cursor CS") on one of the multiple selectable units 66 on the initial screen SCA. The cursor CS is an image indicating that the selectable unit 66 is selected. In a broader sense, the cursor CS is an image indicating that an object is selected. The cursor CS has, for example, a specific color. The cursor CS moves in response to a rotation operation of the dial 12, and the selected selectable unit 66 changes. Furthermore, when a pressing operation is performed on the dial 12, the selection of the selectable unit 66 is confirmed. Even when a screen operation function is assigned to the dial 12, the selection of the selectable unit 66 can be confirmed by the push button 24, as in the case when an engine operation function is assigned to the dial 12.

[0043] Hereinafter, when the multiple selectable portions 66 are to be described separately, they may be referred to as selectable portions 66A, 66B, 66C, 66D, 66E, and 66F. When the multiple push buttons 24 are to be described separately, they may be referred to as push buttons 24A, 24B, 24C, 24D, 24E, and 24F. In the example of Fig. 3, push buttons 24A to 24F are arranged in one-to-one correspondence with the selectable portions 66A to 66F, respectively.

[0044] Next, work vehicle 100 will be described with reference to Fig. 4. Fig. 4 is a block diagram showing work vehicle 100. As shown in Fig. 4, work vehicle 100 further includes, in addition to operation device 1 and upper rotating body 200, 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. Operation device 1 also includes main control device 30. Main control device 30 is arranged, for example, inside upper rotating body 200, at a position different from dial operation unit 10 and 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 rotating 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 section 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 the hydraulic pump 600. As a result, the hydraulic pump 600 sends out pressurized oil to the control valve 700. Pressurized oil is oil under pressure. The control valve 700 controls the flow of pressurized oil in accordance with the operation of each operating lever 220. The control valve 700 supplies pressurized oil to the hydraulic motor of the upper rotating body 200, the hydraulic cylinders of the work equipment 300, the hydraulic motors of the lower traveling body 400, and the hydraulic cylinder (not shown) that drives the blade.

[0049] Dial operation unit 10 outputs rotation operation information indicating the amount and direction of rotation of dial 12 to main control device 30. Dial operation unit 10 also outputs pressing operation information (on information or off) indicating whether dial 12 has been pressed to main control device 30. Furthermore, dial operation unit 10 outputs operation information (on information or off information) indicating whether switches 14A to 14C have been pressed to main control device 30.

[0050] Preferably, the dial operation unit 10 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 elements are, for example, LEDs (light emitting diodes). The light emitting unit 16 will be described in detail 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 elements are, for example, LEDs. The backlight 18 will be described in detail later.

[0053] The dial operation unit 10 may include either the light emitting unit 16 or 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 removable media. The storage unit 263 corresponds to an example of a non-transitory computer-readable storage medium.

[0056] The control unit 261 outputs to the main control device 30 various pieces of information that are input or set in response to operations on the screen displayed on the display unit 22 .

[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 in accordance with operation information (on information or off information) indicating whether or not the push buttons 24A to 24F have been pressed. The display control unit 265 will be described in detail 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 memory unit 34. The control unit 32 includes a processor such as a CPU. The memory unit 34 includes a storage device and stores data and computer programs. The hardware configuration of the memory unit 34 is similar to the hardware configuration of the memory unit 263, for example.

[0060] The control unit 32 acquires rotation operation information and pressing operation information of the dial 12 from the dial operation unit 10, as well as operation information of the switches 14A to 14C. In addition, the control unit 32 acquires various pieces of information that have been input or set in response to operations on 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 .

[0062] The allocation unit 320 selectively allocates to the dial 12 one of an engine operation function for adjusting the rotation speed of the engine 501 and a screen operation function for performing an operation in accordance with the screen displayed on the display unit 22. Therefore, according to this embodiment, compared to a case in which a dedicated dial for adjusting the rotation speed of the engine 501 and a dedicated dial for performing an operation in accordance with the screen displayed on the display unit 22 are provided, it is possible to improve the operability of the operation device 1 by using the dial 12 while suppressing an increase in the number of parts of the operation device 1,

[0063] Specifically, the allocation unit 320 switches the function allocated to the dial 12 between the engine operation function and the screen operation function based on the operation information of the allocation change switch 14A. Then, the allocation unit 320 stores information indicating that the engine operation function has been allocated to the dial 12 or information indicating that the screen operation function has been 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 an engine operation function has been assigned to the dial 12 is stored in the specific area MEM1 indicates that adjustment of the engine speed 501 using the dial 12 is permitted, but that operation of the screen of the display unit 22 using the dial 12 is prohibited.

[0065] On the other hand, the fact that information indicating that a screen operation function has been assigned to the dial 12 is stored in the specific area MEM1 indicates that adjusting the rotation speed of the engine 501 using the dial 12 is prohibited, and that operating the screen of the display unit 22 using the dial 12 is permitted.

[0066] Furthermore, when a screen operation function is assigned to the dial 12, the assignment unit 320 accepts operation information of the initial screen switch 14B and the back switch 14C as valid information. Therefore, according to this embodiment, when a screen operation function is assigned to the dial 12, it is possible to impart to the dial operation unit 10 operability equivalent to that of the push buttons 24A to 24F of the operation unit 20.

[0067] When a screen operation function is assigned to the dial 12, the assignment unit 320 accepts the rotation operation information and 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 accept operation information of the initial screen switch 14B and the back 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 back switch 14C related to operation of the screen of the display unit 22, it is possible to indicate to the operator that the engine operation function is assigned to the dial 12.

[0069] When the engine operation function is assigned to the dial 12, the assignment unit 320 accepts the rotation operation information of the dial 12 as valid information, and does not accept the pressing operation information of the dial 12 as invalid information.

[0070] Furthermore, the allocation unit 320 accepts operation information of the allocation change switch 14A as valid information, regardless of the function allocated 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 accept operation information of the initial screen switch 14B and the back switch 14C, as well as pressing operation information of the dial 12, as invalid information.

[0072] Furthermore, when the key switch for starting the engine 501 is turned on, the allocation unit 320 allocates the engine operation function to the dial 12. Therefore, according to this embodiment, the operator can adjust the rotation speed of the engine 501 immediately after turning on the key switch by operating the dial 12. As a result, 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 assigned to the dial 12, the allocation unit 320 controls the engine control device 503 to adjust (set) the rotation speed of the engine 501 to a rotation speed corresponding to the rotation operation information of the dial 12. As a result, the engine control device 503 adjusts (sets) the rotation speed of the engine 501 to a rotation speed corresponding to the rotation operation information of the dial 12.

[0074] Furthermore, the allocation unit 320 controls the operation unit 20. Specifically, when a screen operation function is assigned to the dial 12, the allocation unit 320 outputs information indicating that the screen operation function is assigned to the dial 12, rotation operation information and pressing operation information of the dial 12, and operation information of the initial screen switch 14B and the back 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 to be displayed on the display unit 22 based on the rotation operation information and pressing operation information of the dial 12 and the operation information of the initial screen switch 14B and the back switch 14C. In addition, the display control unit 265 controls the screen to be displayed on the display unit 22 based on 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 assignment 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 assignment unit 320 does not output rotation operation information and pressing operation information of the dial 12, and operation information of the initial screen switch 14B and the back 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 to be displayed on the display unit 22 based on operation information of the push buttons 24A to 24F.

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

[0077] 2(a) and 4, the notification of the function assigned to the dial 12 will be described. Under the control of the allocation unit 320, the light emitting unit 16 notifies the dial 12 of the function assigned to the dial 12 in a visually recognizable manner. Specifically, under the control of the allocation unit 320, the light emitting unit 16 emits visible light of different colors at the base end 12A of the dial 12 depending on whether an engine operation function or a screen operation function is assigned to the dial 12. Therefore, according to this embodiment, the operator can intuitively recognize the function assigned to the dial 12. The light emitting unit 16 corresponds to an example of a "function notification unit."

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

[0079] Next, with reference to Figures 5(a) and 5(b), the operation of the operating device 1 when an engine operating function is assigned to the dial 12 will be described. Figure 5(a) is a diagram showing a first function notification image 70 that is displayed in response to the assignment of an engine operating function to the dial 12. Figure 5(b) is a diagram showing the lighting state of the dial operating unit 10 when the engine operating 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 a 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 this embodiment, the operator can easily recognize that the function assigned to the dial 12 is an engine operation function by looking at the first function notification image 70. The display control unit 265 corresponds to an example of a "function notification unit."

[0081] Furthermore, after the first function notification image 70 is temporarily displayed, the operator can again view 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 image display area 58. Therefore, after the first function notification image 70 is temporarily displayed, the operator can again view the image displayed in the camera image display area 58.

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

[0083] As shown in FIG. 5(b), the backlight 18 shown in FIG. 4, under the control of the assignment unit 320, irradiates visible light toward the rear surface of the icon 16A of the assignment change switch 14A, lighting up the icon 16A, thereby indicating that the engine operation function is assigned to the dial 12. On the other hand, under the control of the assignment unit 320, the backlight 18 does not irradiate visible light toward the rear surface of the icon 16B of the initial screen switch 14B or the rear surface of the icon 16C of the back switch 14C. Therefore, when the engine operation function is assigned to the dial 12, only the icon 16A of the assignment change switch 14A is lit. 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 a "function notification unit."

[0084] 5(b), the backlight 18 illuminates the back surface of the icon 16A placed next to the dial 12, thereby visually notifying the operator of the function assigned to the dial 12. In other words, the backlight 18 is positioned next to the dial 12, visually notifying the operator of the function assigned to the dial 12. Therefore, since the dial 12 and the notification position (i.e., the position of the icon 16A) are close to each other, the operator can easily recognize that a notification regarding the dial 12 is being made.

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

[0086] Furthermore, after the rotation number image 75 is temporarily displayed, the operator can again view the image located behind the rotation number image 75. In particular, in the example of Fig. 6, display unit 22 temporarily displays rotation number image 75 in camera image display area 58. Therefore, after the rotation number image 75 is temporarily displayed, the operator can again view the image displayed in camera image display area 58.

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

[0088] Next, with reference to Figures 7(a) and 7(b), the operation of the controller device 1 when a screen operation function is assigned to the dial 12 will be described. Figure 7(a) is a diagram showing a second function notification image 80 that is displayed in response to the assignment of a screen operation function to the dial 12. Figure 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), the display control unit 265 shown in FIG. 4 controls the display unit 22 to temporarily display a second function notification image 80 in response to the assignment of a screen operation function to the dial 12. As a result, the display unit 22 temporarily displays the second function notification image 80. The second function notification image 80 indicates that a screen operation function has been assigned to the dial 12. The second function notification image 80 corresponds to an example of "second function notification information." According to this embodiment, the operator can easily recognize that the function assigned to the dial 12 is a screen operation function by looking at the second function notification image 80.

[0090] Furthermore, after the second function notification image 80 is temporarily displayed, the operator can again view 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 image display area 58. Therefore, after the second function notification image 80 is temporarily displayed, the operator can again view the image displayed in the camera image display area 58.

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

[0092] Furthermore, when a screen operation function is assigned to the dial 12, the display unit 22, under the control of the display control unit 265, displays a cursor CS in one of the selectable portions 66A to 66F on the initial screen SCA. In FIG. 7(a), the cursor CS is indicated by hatching. Further, under the control of the display control unit 265, the display unit 22 moves the cursor CS on the selectable portions 66A to 66F based on the rotation operation information of the dial 12. Then, when the pressing operation information of the dial 12 indicates that the dial 12 has been pressed, the display control unit 265 confirms the selection of the selectable portion 66 where the cursor CS is located. Furthermore, the display control unit 265 controls the display unit 22 to display a screen corresponding to the selectable portion 66 whose selection has been confirmed.

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

[0094] In addition, the display control unit 265 may control the display unit 22 so that a function notification image indicating that an engine operation function is assigned to the dial 12 is displayed for the period during which the engine operation function is assigned to the dial 12.

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

[0096] 7(b), the backlight 18 illuminates the backsides of the icons 16A to 16C arranged next to the dial 12, thereby visually notifying the operator of the function assigned to the dial 12. In other words, the backlight 18, located next to the dial 12, visually notifies the operator of the function assigned 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 to each other, the operator can easily recognize that a notification related to the dial 12 is being made.

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

[0098] 4 may be controlled by the assignment unit 320 to notify by voice in a recognizable manner which of the engine operation function and the screen operation function is assigned to the dial 12. In this case as well, the operator can easily recognize the function assigned to the dial 12.

[0099] Next, an operation control method according to this embodiment will be described with reference to Figures 4, 8, and 9. Figures 8 and 9 are flowcharts showing an operation control method executed in the work vehicle 100 (operation device 1). As shown in Figures 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 the engine operation function to the dial 12.

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

[0104] Next, in step S5, the light emitting unit 16 emits visible light of a first color at the base end 12A of the dial 12, which indicates that the engine operating function is assigned to 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 back switch 14C.

[0106] Next, in step S7, the allocation unit 320 determines whether or not the dial 12 has been rotated based on the rotation operation information of the dial 12. Step S7 corresponds to an example of "a step in which the dial receives a rotation operation."

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

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

[0109] In step S8, the allocation unit 320 adjusts the rotation 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 the rotation speed image 75 (FIG. 6) indicating the rotation 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 or not 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.

[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 informing image 80 (FIG. 7(a)) indicating that the screen operation function is assigned 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 assigned to the dial 12 for the period during which the screen operation function is assigned to the dial 12.

[0118] Next, in step S15, the light emitting unit 16 emits visible light of a second color from the base end 12A of the dial 12, which indicates that a screen operation function has been assigned to 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 back 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, operation information of the initial screen switch 14B, operation information of the back switch 14C, and operation information of the push buttons 24A to 24F. Step S17 corresponds to an example of "a step in which the dial accepts a rotation operation".

[0121] Next, in step S18, the allocation unit 320 determines whether or not 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.

[0124] 8 and 9, according to the operation control method of this embodiment, either an engine operation function for adjusting the rotation speed of engine 501 or a screen operation function for performing operations in accordance with the screen displayed on display unit 22 is selectively assigned to dial 12 (steps S3, S12). Therefore, by executing the operation control method in work vehicle 100, it is possible to improve the operability of operation device 1 by dial 12 while suppressing an increase in the number of parts of operation device 1, compared to a case in which a dedicated dial for adjusting the rotation speed of engine 501 and a dedicated dial for performing operations in accordance with the screen displayed on display unit 22 are provided.

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

[0126] As shown in Fig. 10, the display unit 22 displays a 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 explanation of Figure 10 and Figure 11 described later, the push button 24F (Figure 3) corresponding to the selectable section 66F indicating "decide" may be referred to as the "decide button 24F," and the push button 24A (Figure 3) corresponding to the selectable section 66A indicating "back" may be referred to as the "back button 24A."

[0128] First, a case will be described in which a screen operation function is assigned to the dial 12. In this case, to simplify the explanation, attention will be focused mainly on operations performed 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 over a plurality of item selection sections 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 section 85 indicating "Date and Time Setting." Therefore, the item selection section 85 indicating "Date and Time Setting" is selected.

[0130] Then, when the dial 12 is pressed, the selection in the item selection section 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 section 85. In other words, the display unit 22 transitions from the first setting screen SCB to the second setting screen SCC.

[0131] The second setting screen SCC includes a plurality of numerical value input sections 87, a plurality of icons 89, and a cursor CS. The numerical value input sections 87 are areas for inputting numerical values. A pair of icons 89 is arranged for each numerical value input section 87.

[0132] The display unit 22 moves the cursor CS over the plurality of numeric input sections 87 in response to the rotation of the dial 12. In the example of Fig. 10, the cursor CS is positioned at the numeric input section 87 where "20" has been input. Therefore, the numeric input section 87 where "20" has been input is selected.

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

[0134] Then, 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 transitions 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 the configuration of the second setting screen SCC. However, on the third setting screen SCD, the display unit 22 changes the value in the selected numeric input section 87 by rotating the dial 12. Also, on the third setting screen SCD, a pair of icons 89A sandwiching the selected numeric input section 87 visually indicate that the value in the numeric input section 87 can be changed by rotating the dial 12.

[0136] Furthermore, on the third setting screen SCD, the display unit 22 can also change the numerical value in the selected numerical value input section 87 in response to the operation of the push buttons 24C, 24D (FIG. 3) corresponding to the selected sections 66C, 66D.

[0137] Then, when the dial 12 is pressed or the back 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 transitions from the third setting screen SCD to the second setting screen SCC.

[0138] Furthermore, when the back 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 transitions from the second setting screen SCC to the first setting screen SCB.

[0139] Next, a description will be given of a case where an engine operating function is assigned to the dial 12. 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 sections 85 in response to the operation of the push buttons 24B to 24E (FIG. 3) corresponding to the selection sections 66B to 66E.

[0141] Then, when the enter button 24F is pressed, the selection in the item selection section 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 transitions 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 numeric input sections 87 in response to the operation of the push buttons 24B, 24E (FIG. 3) corresponding to the selection sections 66B, 66E.

[0143] Additionally, on the second setting screen SCC, the display unit 22 changes the numerical values in response to the operation of the push buttons 24C, 24D (FIG. 3) corresponding to the selected portions 66C, 66D in the selected numerical value input portion 87. Therefore, when the engine operation function is assigned to the dial 12, the display unit 22 does not change from the second setting screen SCC to the third setting screen SCD. In other words, when the engine operation function is assigned to the dial 12, the display unit 22 does not display the third setting screen SCD.

[0144] Then, when the back 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 transitions 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 on the first setting screen SCB and the second setting screen SCC as when the engine operation function is assigned to the dial 12, and the display unit 22 displays the screen in response to the operation of the push buttons 24A to 24F.

[0146] As described above with reference to FIG. 10 , according to this embodiment, when a screen operation function is assigned to the dial 12, in a period during which the second setting screen SCC for inputting or setting information (hereinafter referred to as "information F1") is displayed, in response to receiving a pressing operation on the dial 12, the display unit 22 changes the second setting screen SCC to the 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 a "first screen," and the third setting screen SCD corresponds to an example of a "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, compared to when an engine operation function is assigned to the dial 12. Therefore, even if the degree of freedom in operation of the dial operation unit 10 is smaller than the degree of freedom in operation of the operation unit 20, at least the second setting screen SCC can be shared between when a screen operation function is assigned to the dial 12 and when 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, the degree of freedom of operation of the dial operation unit 10 includes a clockwise rotation operation of the dial 12, a counterclockwise rotation operation, a pressing operation, and a pressing operation of the return switch 14C. Furthermore, in the example of FIG. 3, the degree of freedom of operation of the operation unit 20 is "6." That is, the degree of freedom of operation of the operation unit 20 includes a pressing operation of each of the six push buttons 24A to 24F. In this 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 providing a 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 for 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. To simplify the 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 receives control from the display control unit 265 and displays the first setting screen SCB.

[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 back 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. A negative determination indicates that it has been 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 decision is made in step S33, the process proceeds to step S34. An affirmative decision indicates that it has been decided that the dial 12 has been pressed or the enter button 24F has been pressed.

[0155] In step S34, the display unit 22 receives control from the display control unit 265 and displays the second setting screen SCC.

[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 back switch 14C, and the operation information of the push buttons 24A to 24E.

[0157] Next, in step S36, the display control unit 265 determines, based on the pressing operation information of the dial 12, whether or not the dial 12 has been pressed.

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

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

[0160] If it is determined in step S40 that the back switch 14C and the back 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 back switch 14C or the back button 24A has been pressed, the process proceeds to step S31.

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

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

[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 back 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 back switch 14C or the back button 24A has been pressed, based on the operation information of the back switch 14C and the back button 24A.

[0166] If a negative determination is made in step S39, the process proceeds to step S38. A 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. An affirmative determination indicates that it has been determined that the dial 12 has been pressed, the back switch 14C has been pressed, or the back button 24A has been pressed.

[0168] 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. In this case, in the screen control method, the screen is not operated by the dial operation unit 10, but is operated only by the push buttons 24A to 24F.

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

[0170] 12, the display unit 22 displays a first function operation screen SCE under the control of the display control unit 265. The first function operation screen SCE is a screen that accepts 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 sections 95 and a cursor CS. In Fig. 12, the cursor CS is indicated by hatching. The item selection section 95 is an area for selecting a major function item related to the work vehicle 100.

[0172] Hereinafter, in the explanations of Figure 12 and Figures 13 and 14 described below, the push button 24F (Figure 3) corresponding to the selectable section 66F indicating "OK" or "RESET" may be referred to as the "OK button 24F," and the push button 24A (Figure 3) corresponding to the selectable section 66A indicating "BACK" may be referred to as the "BACK button 24A."

[0173] A case will be described where a screen operation function is assigned to the dial 12. In this case, to simplify the explanation, attention will be focused mainly on operations performed 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 over a plurality of item selection sections 95 in response to the rotation operation of the dial 12. In the example of Fig. 12, the cursor CS is positioned on the item selection section 95 indicating "Check and reset time." Therefore, the item selection section 95 indicating "Check and reset time" is selected.

[0175] Then, when the dial 12 is pressed, the selection in the item selection section 95 is confirmed. As a result, the display section 22 changes the first function operation screen SCE to a second function operation screen SCF corresponding to the item indicated by the item selection section 95. In other words, the display section 22 transitions from the first function operation screen SCE to the second function operation screen SCF.

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

[0177] The display unit 22 moves the cursor CS over a plurality of item selection sections 97 in response to the rotation of the dial 12. In the example of Fig. 12, the cursor CS is positioned on the item selection section 97 indicating "engine oil." Therefore, the item selection section 97 indicating "engine oil" is selected.

[0178] Then, when the dial 12 is pressed, the display unit 22 changes the second function operation screen SCF to the third function operation screen SCG. That is, the display unit 22 transitions from the second function operation screen SCF to the third function operation screen SCG.

[0179] The third function operation screen SCG is a screen that accepts operations to execute 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 a plurality of item selection sections 97 and a plurality of target display sections 98. The message image 101 includes information indicating the content of the function to be executed and information indicating a final confirmation of the execution of the function.

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

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

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

[0183] Furthermore, when the cursor CSX is positioned on the selection section 66F indicating "OK" and the selection section 66F is selected, pressing the dial 12 causes the control section 261 of the display control device 26 or the control section 32 of the main control device 30 to execute the function indicated by the item selection sections 95, 97. In the example of FIG. 12, the information displayed on the target display section 98 is changed (for example, reset). The display section 22 displays the result of the execution of the function.

[0184] On the other hand, when the cursor CSX is positioned on the selection portion 66A indicating "Back" on the third function operation screen SCG, if 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 transitions from the third function operation screen SCG to the second function operation screen SCF. Therefore, even if the operator transitions from the first function operation screen SCE to the third function operation screen SCG in one go by repeatedly pressing the dial 12, it is possible to prevent a function from being executed too quickly. Note that repeatedly pressing the dial 12 means repeatedly pressing the dial 12.

[0185] Furthermore, whether a screen operation function is assigned to the dial 12 or an engine operation function is assigned to it, operations corresponding to the selection sections 66A to 66F of the selection area 65 can be performed using the push buttons 24A to 24F on the first function operation screen SCE to the third function operation screen SCG.

[0186] 12 , according to this embodiment, 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 a pressing operation of the dial 12, and if the dial 12 receives another pressing operation before receiving a rotation operation during a period in which the third function operation screen SCG is displayed on the display unit 22, the display unit 22 changes the third function operation screen SCG to the second function operation screen SCF. This makes it possible to prevent the operator from repeatedly pressing the dial 12 with too much force and thereby executing a function indicated by the item selection units 95 and 97. The second function operation screen SCF corresponds to an example of a "third screen," and the third function operation screen SCG corresponds to an example of a "fourth screen."

[0187] Next, with reference to Fig. 4 and Figs. 12 to 14, a second screen control method for 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 a screen operation function is assigned to the dial 12. To simplify the 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, under the control of the display control unit 265, the display unit 22 displays the first function operation screen SCE.

[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 back switch 14C, and the operation information of the push buttons 24A to 24C, 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 a negative determination is made in step S53, the process proceeds to step S52. A negative determination indicates that it has been determined that the dial 12 has not been pressed and the enter button 24F has not been pressed.

[0192] On the other hand, if an affirmative decision is made in step S53, the process proceeds to step S54. An affirmative decision indicates that it has been decided that the dial 12 has been pressed or the enter button 24F has been pressed.

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

[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 back switch 14C, and the operation information of the push buttons 24A to 24C, 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] 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 disables the cursor CS and displays the cursor CSX in the selected portion 66A indicating "Back".

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

[0200] If it is determined in step S58 that the dial 12 has been 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 been rotated, the process proceeds to step S59.

[0202] In step S59, the display control unit 265 determines, based on the pressing operation information of the dial 12, whether or not the dial 12 has been pressed.

[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 is not pressed, the process proceeds to step S60.

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

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

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

[0208] In step S61, the display control unit 265 determines whether or not the dial 12 is pressed while the cursor CSX is positioned in the selection portion 66F indicating "OK." In addition, the display control unit 265 determines whether or not the decision button 24F corresponding to the selection portion 66F indicating "OK" is 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 is pressed while the cursor CSX is positioned on the selection portion 66A indicating "back." In addition, the display control unit 265 determines whether the back button 24A or the back switch 14C corresponding to the selection portion 66A indicating "back" is pressed.

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

[0213] If the determination in step S61 is affirmative, 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, control unit 261 of display control device 26 or control unit 32 of main control device 30 executes the function indicated by item selection units 95, 97. Display unit 22 displays the execution result of the function under the control of 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 embodiments and can be implemented in various aspects without departing from the spirit of the present invention. For example, the following modifications (1) to (5) are possible. Furthermore, the multiple components disclosed in the above embodiments can be modified as appropriate. For example, some of the components shown in one embodiment may be added to the components of another embodiment, or some of the components shown in one embodiment may be deleted from the embodiment.

[0216] Furthermore, the drawings mainly show each component in a schematic manner to facilitate understanding of the invention, and the thickness, length, number, spacing, etc. of each component shown in the drawings may differ from the actual ones due to the convenience of creating the drawings. Furthermore, the configuration of each component shown in the above embodiment is merely an example and is not particularly limited, and it goes without saying that various modifications are possible within a range that does not substantially deviate from the effects of the present invention.

[0217] 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] Furthermore, the order of steps S4 to S6 is not particularly limited and may be any order or may be performed in parallel. The order of steps S13 to S16 is not particularly limited and may be any order or may be performed in parallel.

[0219] 2(b) are preferred examples of the present invention and are not essential. The operating device 1 may also have one of the signs LB1 and LB2.

[0220] (2) In Fig. 4, the allocation unit 320 and the display control unit 265 are included in separate control devices (main control device 30, display control device 26), but they may be included in the same control device. Furthermore, 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 merely examples, 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 cockpit 205 or may be detachable from the cockpit 205. The operation unit 20 may also be a mobile communication terminal such as a smartphone or tablet.

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

[0223] (5) In the present embodiment described with reference to FIGS. 1 to 14, a hydraulic excavator has been given as an example of work vehicle 100, but as long as the rotation speed of engine 501 is adjusted using dial 12, work vehicle 100 is not limited to a hydraulic excavator and may be, for example, other construction machinery or agricultural machinery. Examples of construction machinery include loaders such as wheel loaders, or carriers. Examples of agricultural machinery include riding tractors, riding combine harvesters, and riding rice transplanters.

[0224] <Notes on the invention> According to one aspect of the present invention, an operating device includes a dial, a display unit, and an assignment unit. The dial receives a rotation operation. The assignment unit selectively assigns to the dial one of an engine operation function for adjusting the engine speed and a screen operation function for performing an operation according to a screen displayed on the display unit.

[0225] According to another aspect of the present invention, a work vehicle includes the above-described operation device and a work implement that performs work.

[0226] According to yet another aspect of the present invention, an operation control method is executed in an operation device including a dial and a display unit, and includes the steps of selectively assigning to the dial one of an engine operation function for adjusting an engine speed and a screen operation function for performing an operation according to a screen displayed on the display unit, and allowing the dial to accept a rotation operation. [Industrial Applicability]

[0227] The present invention relates to an operating device for a work machine, a work vehicle, and an operation control method, and has industrial applicability. [Explanation of symbols]

[0228] 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 section) 22 Display section 70 First function notification image (first function notification information) 75 RPM image (rotation speed information) 80 Second function notification image (second function notification information) 82 Function notification image (function notification information) 100 Work Vehicles 265 Display control unit (function notification unit) 300 Work Equipment 320 Allocation Section LB1, LB2 label SCC 2nd setting screen (1st screen) SCD 3rd setting screen (2nd screen) SCF 2nd function operation screen (3rd screen) SCG 3rd function operation screen (4th screen)

Claims

1. A dial that accepts rotational operations, A display unit; and a notification unit that controls the display unit to temporarily display notification information related to the changed setting when the setting of the dial is changed. Operating devices for work machines.

2. The operating device for a work machine according to claim 1 , wherein the change of the setting includes a change of a function assigned to the rotation operation of the dial.

3. 3. The operating device for a work machine according to claim 2, wherein the function assigned to the rotation operation is selected from a plurality of functions including an engine operation function for adjusting the rotation speed of the engine, and a screen operation function for selecting an image on a screen displayed on the display unit.

4. 4. The operating device for a work machine according to claim 2, wherein the notification unit notifies which function is assigned to the rotation operation by lighting up a light on or next to the dial so that the light can be recognized.

5. 5. The operating device for a work machine according to claim 1, wherein the notification information is displayed in a camera image display area on the display unit that displays a camera image.

6. 6. The operating device for a work machine according to claim 1, wherein the notification information is displayed together with an icon of the dial on the display unit.

7. 7. The operating device for a work machine according to claim 1, wherein the notification unit controls the display unit to display the result of the rotation operation of the dial.

8. An operating device for a work machine according to any one of claims 1 to 6; a work machine that performs the work; A work vehicle equipped with:

9. An operation control method executed in an operation device of a work machine having a dial and a display unit, a step of receiving a rotation operation of the dial; When the setting of the dial is changed, controlling the display unit to temporarily display notification information related to the changed setting; An operation control method comprising:

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