Control method for work machine

Abstract

To provide a control method for a work machine capable of making an operator learn meanings of marks.SOLUTION: The present invention provides a control method for a work machine including a display section 91 that displays a first screen displaying a first mark showing a set function and a second screen (a guidance screen 520) to set functions. The method comprises making the display section 91 display a second mark (a first mark image 610 for learning) corresponding to the first mark when the function setting is selected, and deleting the second mark (the first mark image 610 for learning) from a screen displayed by the display section 91 after displaying the second mark (the first mark image 610 for learning).SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a method for controlling a work machine. [Background technology]

[0002] There are known construction machines that allow an operator to recognize the state of the machine via a display device equipped on the machine. For example, the construction machine of Patent Document 1 displays a state change display mark on the display device. Specifically, when the state of the construction machine changes, the display device displays the state change display mark in a specific display location on the display screen. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2012-72653 A Summary of the Invention [Problem to be solved by the invention]

[0004] However, there are cases where the operator does not know the meaning of the marks displayed on the display device, and therefore, there are cases where the operator is not able to recognize the change in the state of the work machine simply by displaying the marks.

[0005] The present invention has been made in consideration of the above-mentioned problems, and an object of the present invention is to provide a control method for a work machine that can enable an operator to learn the meanings of marks. [Means for solving the problem]

[0006] A control method for a work machine according to the present invention is a control method for a work machine having a display unit that displays a first screen that displays a first mark indicating a set function and a second screen for setting the function, and includes the steps of: when setting the function is selected, causing the display unit to display a second mark corresponding to the first mark; and, after displaying the second mark, erasing the second mark from the screen displayed on the display unit. Effect of the Invention

[0007] According to the present invention, it is possible to allow a worker to learn the meaning of a mark. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a side view of a work machine according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view of a machine body of a work machine. [Diagram 3] FIG. 2 is a block diagram of a work machine. [Figure 4] FIG. 2 is a diagram showing a display device in a work machine. [Diagram 5] FIG. 13 is a diagram showing a display device displaying a guidance screen. [Figure 6] 13 is a diagram showing the display device after the operation unit has accepted an instruction to set a boom height limiting function. FIG. [Figure 7] 13 is a diagram showing the display device after a certain period of time has elapsed since the first learning mark image was displayed on the display section. FIG. [Figure 8] FIG. 13 is a diagram showing the display device after a certain period of time has elapsed since the first learning mark image was superimposed on the home screen. [Figure 9] 5 is a flowchart showing processing executed by a second controller in the work machine. [Figure 10] 13 is a diagram showing another example of the display device after a certain period of time has elapsed since the first learning mark image was displayed on the display section. FIG. [Figure 11]13 is a diagram showing another example of the display device after a certain period of time has elapsed since the first learning mark image was displayed on the display section. FIG. [Figure 12] FIG. 4 is a diagram showing a display device in a work machine according to a second embodiment of the present invention. [Figure 13] 13 is a diagram showing the display device after the operation unit has accepted an instruction to set a boom height limiting function. FIG. [Figure 14] 5 is a flowchart showing processing executed by a second controller in the work machine. [Figure 15] FIG. 11 is a diagram showing a display device in a work machine according to a third embodiment of the present invention. [Figure 16] 13 is a diagram showing the display device after the operation unit has accepted an instruction to disable the boom height limiting function. FIG. [Figure 17] 5 is a flowchart showing processing executed by a second controller in the work machine. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the working machine of the present invention will be described with reference to the drawings (FIGS. 1 to 17). However, the present invention is not limited to the following embodiment. Note that where the description overlaps, the description may be omitted as appropriate. In addition, in the drawings, the same or corresponding parts are given the same reference symbols and the description will not be repeated.

[0010] [Embodiment 1] A first embodiment of the present invention will be described below with reference to Figs. 1 to 11. First, a work machine 1 of this embodiment will be described with reference to Figs. 1 to 3. Fig. 1 is a side view of the work machine 1 of this embodiment. As shown in Fig. 1, the work machine 1 of this embodiment is a backhoe. A backhoe is a type of construction machine. The work machine 1 of this embodiment comprises a machine body 2, a boom 3, an arm 4, a bucket 5, and a traveling device 7. The work machine 1 of this embodiment further comprises a boom actuator 30, an arm actuator 40, and an attachment actuator 50.

[0011] The machine body 2 has a driver's seat 6. An operator sits in the driver's seat 6 to operate the work machine 1. The machine body 2 is supported by a traveling device 7. The machine body 2 may be supported by the traveling device 7 so as to be freely rotatable. The machine body 2 is provided with an engine, a fuel tank, a battery, a hydraulic system, and a hydraulic oil tank. The machine body 2 is also provided with a bonnet that houses the engine, fuel tank, battery, hydraulic system, and hydraulic oil tank, and the driver's seat 6 is disposed on the bonnet.

[0012] The boom 3 is supported by the machine body 2 so as to be able to swing freely around a first rotation fulcrum P1. Specifically, the base end of the boom 3 is pivotally supported by the machine body 2. The first rotation fulcrum P1 is a rotation axis extending along the left-right direction when the operator's seat 6 is viewed from the front. Hereinafter, the left-right direction when the operator's seat 6 is viewed from the front may be referred to as the "left-right direction."

[0013] The boom actuator 30 operates the boom 3. Specifically, the boom actuator 30 swings the boom 3 about a first rotation fulcrum P1. Therefore, the boom actuator 30 adjusts the angle α of the boom 3 with respect to the horizontal plane. As a result, the height of the boom 3 with respect to the horizontal plane is adjusted.

[0014] The boom actuator 30 includes a boom cylinder 31 and a boom piston 32. The boom cylinder 31 advances and retreats the boom piston 32 by hydraulic oil. Therefore, the boom actuator 30 expands and contracts by the hydraulic oil. As the boom actuator 30 expands and contracts, the boom 3 swings about the first rotation fulcrum P1.

[0015] The arm 4 is supported by the boom 3 so as to be able to swing freely around a second rotation fulcrum P2. Specifically, a base end of the arm 4 is pivotally supported at a tip end of the boom 3. The second rotation fulcrum P2 is a rotation axis extending along the left-right direction.

[0016] The arm actuator 40 operates the arm 4. Specifically, the arm actuator 40 swings the arm 4 around the second rotation fulcrum P2. Therefore, the arm actuator 40 adjusts the angle β of the arm 4 relative to the boom 3. As a result, the position (degree of closeness or distance) of the bucket 5 (attachment) relative to the boom 3 and the machine body 2 is adjusted.

[0017] The arm actuator 40 includes an arm cylinder 41 and an arm piston 42. The arm cylinder 41 advances and retreats the arm piston 42 by hydraulic oil. Therefore, the arm actuator 40 expands and contracts by the hydraulic oil. As the arm actuator 40 expands and contracts, the arm 4 swings about the second rotation fulcrum P2.

[0018] The bucket 5 is a type of attachment. The bucket 5 is supported by the arm 4 so as to be able to swing about a third rotation fulcrum P3. Specifically, the bucket 5 is supported at the tip of the arm 4. The third rotation fulcrum P3 is a rotation axis extending in the left-right direction.

[0019] The attachment actuator 50 operates the bucket 5. Specifically, the attachment actuator 50 swings the bucket 5 about the third rotation fulcrum P3.

[0020] The attachment actuator 50 includes an attachment cylinder 51 and an attachment piston 52. The attachment cylinder 51 advances and retreats the attachment piston 52 by hydraulic oil. Therefore, the attachment actuator 50 expands and contracts by the hydraulic oil. The extension and contraction of the attachment actuator 50 causes the bucket 5 to swing about the third rotation fulcrum P3. Note that the work machine 1 is capable of replacing the attachment. For example, the bucket 5 can be replaced with a hydraulic breaker.

[0021] The traveling device 7 causes the working machine 1 to travel. In this embodiment, the traveling device 7 is a crawler type traveling device.

[0022] Next, the configuration of the work machine 1 will be further described with reference to Figures 1 and 2. Specifically, the configuration around the driver's seat 6 will be described. Figure 2 is a perspective view of the machine body 2 of the work machine 1.

[0023] 2, the work machine 1 further includes a control unit 8 and a display device 9. The control unit 8 and the display device 9 are provided on the machine body 2. Specifically, the control unit 8 and the display device 9 are disposed in front of the driver's seat 6.

[0024] The control unit 8 includes various operation members that enable the operator to control the work machine 1. The various operation members include an arm operation lever 81 and a boom operation lever .

[0025] An operator can operate the arm 4 by operating the arm operating lever 81. Specifically, as described with reference to FIG. 1, an operator can adjust the angle β of the arm 4 relative to the boom 3 by operating the arm operating lever 81. Thus, an operator can adjust the position (degree of closeness or distance) of the attachment relative to the boom 3 and the machine body 2 by operating the arm operating lever 81. Hereinafter, the angle β of the arm 4 relative to the boom 3 may be referred to as "angle β of the arm 4."

[0026] An operator can operate the boom 3 by operating the boom operation lever 82. Specifically, as described with reference to FIG. 1, an operator can adjust the angle α of the boom 3 with respect to the horizontal plane by operating the boom operation lever 82. Therefore, an operator can adjust the height of the boom 3 with respect to the horizontal plane by operating the boom operation lever 82. Hereinafter, the angle α of the boom 3 with respect to the horizontal plane may be referred to as "angle α of the boom 3." Furthermore, the height of the boom 3 with respect to the horizontal plane may be referred to as "height of the boom 3."

[0027] The display device 9 displays various screens. In detail, the display device 9 displays a home screen 510 and a guidance screen 520, as will be described later with reference to Fig. 4, Fig. 5, etc.

[0028] Next, the configuration of the work machine 1 of this embodiment will be further described with reference to Figures 1 to 3. Figure 3 is a block diagram of the work machine 1. As shown in Figure 3, the work machine 1 further includes an imaging device 10, a first controller 11, a boom electromagnetic proportional valve 33, a boom control valve 34, a boom angle sensor 35, an arm electromagnetic proportional valve 43, an arm control valve 44, and an arm angle sensor 45.

[0029] The boom control valve 34 controls the supply of hydraulic oil to the boom cylinder 31, the stop of the supply of hydraulic oil to the boom cylinder 31, and the discharge of hydraulic oil from the boom cylinder 31, in response to an operator's operation of the boom operation lever 82 described with reference to Fig. 2. Therefore, the operator can adjust the angle α of the boom 3 by operating the boom operation lever 82. In other words, the operator can adjust the height of the boom 3 by operating the boom operation lever 82.

[0030] The boom electromagnetic proportional valve 33 is controlled by the first controller 11 to increase or decrease the rate of change (supply amount per unit time) of the supply amount of hydraulic oil supplied from the boom control valve 34 to the boom cylinder 31.

[0031] The arm control valve 44 controls the supply of hydraulic oil to the arm cylinder 41, the stop of the supply of hydraulic oil to the arm cylinder 41, and the discharge of hydraulic oil from the arm cylinder 41, in response to an operator's operation of the arm operating lever 81 described with reference to Fig. 2. Therefore, the operator can adjust the angle β of the arm 4 by operating the arm operating lever 81. In other words, the operator can adjust the position of the arm 4 by operating the arm operating lever 81.

[0032] The arm electromagnetic proportional valve 43 is controlled by the first controller 11 to increase or decrease the rate of change (supply amount per unit time) of the supply amount of hydraulic oil supplied from the arm control valve 44 to the arm cylinder 41.

[0033] The boom angle sensor 35 detects the angle α of the boom 3. The first controller 11 stores the angle α of the boom 3 detected by the boom angle sensor 35 when the function to limit the height of the boom 3 is set. The function to limit the height of the boom 3 is provided to prevent the boom 3 from interfering with an obstacle (for example, a structure such as a ceiling) above the work machine 1. In the following description, the function to limit the height of the boom 3 may be referred to as a "boom height limiting function."

[0034] The arm angle sensor 45 detects the angle β of the arm 4. When a function for limiting the position of the arm 4 is set, the first controller 11 stores the angle β of the arm 4 detected by the arm angle sensor 45. Hereinafter, the function for limiting the position of the arm 4 may be referred to as an "arm position limiting function."

[0035] The function of limiting the position of the arm 4 is provided to prevent the attachment from interfering with the boom 3 and the machine body 2. For example, since a hydraulic breaker is longer than the bucket 5, when the attachment is replaced from the bucket 5 to the hydraulic breaker, the hydraulic breaker may interfere with the boom 3 and the machine body 2. Therefore, after the attachment is replaced from the bucket 5 to the hydraulic breaker, the position of the arm 4 may be limited.

[0036] The imaging device 10 is controlled by the first controller 11 to capture images of the environment around the work machine 1. The images (video) captured by the imaging device 10 are displayed on the display device 9.

[0037] The first controller 11 controls each part of the work machine 1. The first controller 11 includes, for example, a processing unit that executes various processes, a storage unit that stores various programs and various data, and an input / output interface. The processing unit is configured by, for example, a processor that executes various calculations, such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). Alternatively, the processing unit may be configured by a general-purpose computing machine. The storage unit includes, for example, a semiconductor memory. The storage unit is configured by, for example, a RAM (Random Access Memory) and a ROM (Read Only Memory). The storage unit may further include a non-volatile memory, such as an EEPROM (registered trademark) or a flash memory. The first controller 11 is configured by, for example, an ECU (Electronic Control Unit).

[0038] In this embodiment, when the boom height limiting function is set, the first controller 11 limits the height of the boom 3. Similarly, when the arm position limiting function is set, the first controller 11 limits the position of the arm 4. The operator can set the boom height limiting function and the arm position limiting function via the display device 9. Limiting the height of the boom 3 is an example of a change in the state of the work machine 1. Similarly, limiting the position of the arm 4 is an example of a change in the state of the work machine 1.

[0039] The display device 9 has a display unit 91, an operation unit 92, and a second controller 93. The display unit 91 is configured by a display such as a liquid crystal display or an organic EL display. The operation unit 92 is operated by an operator to receive various instructions. The operator can operate the operation unit 92 to input various instructions to the second controller 93. The operation unit 92 is an example of a reception unit.

[0040] The second controller 93 displays various screens on the display unit 91 based on various information transmitted from the first controller 11. The second controller 93 includes, for example, a processing unit that executes various processes, a storage unit that stores various programs and various data, and an input / output interface. The second controller 93 is, for example, configured by an ECU. The second controller 93 is an example of a display processing unit.

[0041] Next, the display device 9 will be further described with reference to Figures 1 to 9. Figure 4 is a diagram showing the display device 9 in the work machine 1. In detail, Figure 4 shows the display device 9 displaying a home screen 510.

[0042] 4, the display unit 91 displays a home screen 510. The home screen 510 is an example of a first screen. The home screen 510 has a main display area 511, a first selection item display area 512, and a setting function display area 513.

[0043] The main display area 511 displays, for example, a fuel gauge, a coolant temperature gauge, and a hydraulic oil temperature gauge. Specifically, the main display area 511 displays a fuel gauge, a coolant temperature gauge, and a hydraulic oil temperature gauge when the engine is started. The first selection item display area 512 displays various selection items. Specifically, the first selection item display area 512 displays character images (character string images) indicating the various selection items.

[0044] In this embodiment, the operation unit 92 includes a plurality of operation switches. Specifically, the operation unit 92 includes a first operation switch 921 to a sixth operation switch 926. The first operation switch 921 to the sixth operation switch 926 correspond one-to-one to the selection items displayed in the first selection item display area 512. When the display unit 91 is displaying the home screen 510, the first operation switch 921 to the sixth operation switch 926 are assigned a function of selecting a corresponding one of the selection items displayed in the first selection item display area 512.

[0045] For example, the second operation switch 922 is assigned a function of selecting the selection item T1 "camera." When the worker presses the second operation switch 922, the second controller 93 displays an image (video) captured by the imaging device 10 in the main display area 511. When the worker presses the second operation switch 922 again, the second controller 93 displays a fuel level gauge, a coolant temperature gauge, and a hydraulic oil temperature gauge in the main display area 511. When the work machine 1 is traveling, the image (video) captured by the imaging device 10 is displayed in the main display area 511. Also, when the work machine 1 is performing work, the image (video) captured by the imaging device 10 is displayed in the main display area 511.

[0046] In this embodiment, the selection items displayed in the first selection item display area 512 include items for setting functions of the work machine 1. Specifically, the selection items include selection item T2 "Arm limit" and selection item T3 "Height limit". Selection item T2 "Arm limit" is an item for setting an arm position limit function. Selection item T3 "Height limit" is an item for setting a boom height limit function.

[0047] When the display unit 91 is displaying the home screen 510, a function of selecting the selection item T2 “Arm Limit” is assigned to the third operation switch 923. When the worker presses the third operation switch 923, the second controller 93 causes the display unit 91 to display a guidance screen for setting the arm position limit function. The arm position limit function can be set arbitrarily by the worker.

[0048] When the display unit 91 is displaying the home screen 510, the fourth operation switch 924 is assigned a function of selecting the selection item T3 "height limit". When the worker presses the fourth operation switch 924, the second controller 93 causes the display unit 91 to display a guidance screen 520, which will be described later with reference to Fig. 5. The guidance screen 520 is a screen for setting a boom height limit function. The boom height limit function can be set arbitrarily by the worker.

[0049] The set function display area 513 displays marks indicating functions set in the work machine 1. Therefore, the home screen 510 displays marks indicating functions set in the work machine 1. The marks are, for example, icons, figures, or pictograms. In this embodiment, the set function display area 513 includes a first mark display area 513a, a second mark display area 513b, and a third mark display area 513c. The marks displayed in the set function display area 513 may be lit or may flash. Furthermore, if the display unit 91 is a color display, the marks may be colored.

[0050] When the camera function is set, the first mark display area 513a displays a first function mark 601. The first function mark 601 indicates that the camera function is set. More specifically, the first function mark 601 indicates that the imaging device 10 is operating.

[0051] When the arm position limiting function is set, a second function mark 602 is displayed in the second mark display area 513b. The second function mark 602 indicates that the arm position limiting function is set.

[0052] When the boom height limiting function is set, the third mark display area 513c displays a third function mark 603, which will be described with reference to FIG. 7 and the like. The third function mark 603 indicates that the boom height limiting function is set. The third function mark 603 is an example of a first mark. Note that FIG. 4 shows the home screen 510 displayed on the display unit 91 when the boom height limiting function is not set. Therefore, the third function mark 603 is not displayed in the third mark display area 513c.

[0053] Next, the display device 9 will be further described with reference to Figs. 1 to 5. Fig. 5 is a diagram showing the display device 9 displaying a guidance screen 520. As described with reference to Fig. 4, when the operator presses the fourth operation switch 924 while the display unit 91 is displaying the home screen 510, the second controller 93 causes the display unit 91 to display the guidance screen 520. The operation unit 92 accepts an instruction to set a boom height limiting function while the display unit 91 is displaying the guidance screen 520. The instruction to set the boom height limiting function is an example of an instruction to set a function, and the guidance screen 520 is an example of a second screen.

[0054] 5, the guidance screen 520 displays a first guidance image G1. The first guidance image G1 is an image for guiding the operator on an operation for limiting the height of the boom 3. The first guidance image G1 includes, for example, an object image G11 and a message image G12.

[0055] The object image G11 is an image for visually guiding the worker on the operation to limit the height of the boom 3. For example, the object image G11 is a graphic or pictogram. The message image G12 is a character string image that indicates the operation to limit the height of the boom 3. The worker can set the boom height limiting function by operating the work machine 1 following the guidance of the first guidance image G1.

[0056] As shown in FIG. 5, the guidance screen 520 has a second selection item display area 521. The second selection item display area 521 displays various selection items. Specifically, the second selection item display area 521 displays a character image (character string image) indicating the various selection items. In this embodiment, the second selection item display area 521 displays a selection item T11 "Back" and a selection item T12 "Decidue". The selection item T11 "Back" is an item selected when returning to the home screen 510 without setting the boom height limit function. The selection item T12 "Decidue" is an item selected when setting the boom height limit function.

[0057] When the display unit 91 is displaying the guidance screen 520, a function of selecting the selection item T11 “Back” is assigned to the first operation switch 921. When the operator presses the first operation switch 921, the second controller 93 causes the display unit 91 to display the home screen 510.

[0058] When the display unit 91 displays the guidance screen 520, the sixth operation switch 926 is assigned a function of selecting the selection item T12 "OK". When the operator presses the sixth operation switch 926, a boom height limiting function is set. As a result, the height (maximum height) of the boom 3 is limited.

[0059] Here, an explanation will be given of an operation performed by the worker when setting the boom height limiting function, and a process executed by the first controller 11 in response to the operation. The worker can set the boom height limiting function while the guidance screen 520 is displayed. Specifically, when setting the boom height limiting function, the worker operates the boom operation lever 82 to raise the boom 3 to a position (upper limit position) at which the worker wants to limit the height of the boom 3. Next, the worker presses the sixth operation switch 926. As a result, the height (maximum height) of the boom 3 is limited to the upper limit position.

[0060] When the operator presses the sixth operation switch 926, the second controller 93 outputs a signal indicating that the sixth operation switch 926 has been pressed to the first controller 11. The first controller 11 stores the angle α of the boom 3 detected by the boom angle sensor 35 when the signal indicating that the sixth operation switch 926 has been pressed is received. This angle α (hereinafter referred to as "limit angle α1") corresponds to the upper limit position of the boom 3. Thereafter, the first controller 11 controls the hydraulic system of the working oil based on the boom angle sensor 35 so that the angle α of the boom 3 does not exceed the limit angle α1 until the boom height limit function is released.

[0061] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 6. Fig. 6 is a diagram showing the display device 9 after the operation unit 92 has accepted an instruction to set the boom height limiting function. In other words, Fig. 6 shows the display device 9 after the operator has pressed the sixth operation switch 926.

[0062] 6, in response to the operation unit 92 receiving an instruction to set the boom height limiting function, the second controller 93 causes the display unit 91 to display the first learning mark image 610 and superimposes the first learning mark image 610 on the guidance screen 520. That is, in response to the operator pressing the sixth operation switch 926, the second controller 93 superimposes the first learning mark image 610 on the guidance screen 520. In this embodiment, the first learning mark image 610 is superimposed at the center of the guidance screen 520.

[0063] The first learning mark image 610 corresponds to a third function mark 603, which will be described later with reference to Fig. 7. Specifically, the first learning mark image 610 shows an enlarged version of the third function mark 603. The first learning mark image 610 is an example of a second mark.

[0064] Next, the display device 9 will be further described with reference to Figures 1 to 7. Figure 7 is a diagram showing the display device 9 after a certain period of time has elapsed since the first learning mark image 610 was displayed on the display unit 91.

[0065] As shown in FIG. 7 , the second controller 93 superimposes the first learning mark image 610 on the guidance screen 520, and then causes the display unit 91 to display the home screen 510 instead of the guidance screen 520 while keeping the first learning mark image 610 displayed on the display unit 91. In other words, the second controller 93 transitions the screen displayed on the display unit 91 from the guidance screen 520 to the home screen 510. As a result, the first learning mark image 610 is superimposed on the home screen 510. In this embodiment, the first learning mark image 610 is superimposed at the center of the home screen 510. Specifically, the first learning mark image 610 is superimposed on the main display area 511.

[0066] Furthermore, the second controller 93 executes a setting notification process when causing the display unit 91 to display the home screen 510 instead of the guidance screen 520. The setting notification process is a process for notifying on the home screen 510 that the boom height limiting function has been set.

[0067] In this embodiment, the setting notification process is a process of displaying third function mark 603 on home screen 510. Specifically, third function mark 603 is displayed in third mark display area 513c. Note that first learning mark image 610 is superimposed on main display area 511. Therefore, first learning mark image 610 is displayed in an area that does not overlap with third function mark 603 (third mark display area 513c).

[0068] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 8. Fig. 8 is a diagram showing the display device 9 after a certain period of time has elapsed since the first learning mark image 610 was superimposed on the home screen 510.

[0069] 8, after a certain period of time has elapsed since the second controller 93 superimposed the first learning mark image 610 on the home screen 510, the second controller 93 erases the first learning mark image 610 from the display unit 91. In other words, after a certain period of time has elapsed since the second controller 93 transitioned the screen displayed on the display unit 91 from the guidance screen 520 to the home screen 510, the second controller 93 erases the first learning mark image 610 from the display unit 91. As a result, the home screen 510 becomes the normal state.

[0070] Next, the processing executed by the second controller 93 will be described with reference to Fig. 1 to Fig. 9. Fig. 9 is a flowchart showing processing executed by the second controller 93 in the work machine 1. Specifically, Fig. 9 shows processing executed by the second controller 93 after the selection item T3 "height limit" is selected while the home screen 510 is displayed. In other words, Fig. 9 shows processing executed by the second controller 93 after the fourth operation switch 924 is pressed while the home screen 510 is displayed on the display unit 91.

[0071] As shown in FIG. 9, when the fourth operation switch 924 is pressed while the home screen 510 is displayed on the display unit 91, the second controller 93 causes the display unit 91 to display the guidance screen 520 (Step S1).

[0072] After causing the display unit 91 to display the guidance screen 520, the second controller 93 waits until the operator selects one of the selection item T11 "Back" and the selection item T12 "OK" (step S2).

[0073] When the operator presses the first operation switch 921 and selects the selection item T11 “Back” (B of step S2), the second controller 93 causes the display unit 91 to display the home screen 510 (step S3), and ends the processing shown in FIG. 9.

[0074] When the operator presses the sixth operation switch 926 to select the selection item T12 “OK” (A of step S2), the second controller 93 executes a series of processes from step S4 to step S6. That is, the second controller 93 executes a series of processes from step S4 to step S6 in response to the operation unit 92 accepting an instruction to set the boom height limiting function.

[0075] In detail, in response to the operation unit 92 receiving an instruction to set the boom height limiting function, the second controller 93 displays the first learning mark image 610 on the display unit 91 and superimposes the first learning mark image 610 on the guidance screen 520 (step S4).

[0076] Next, the second controller 93 causes the display unit 91 to display the home screen 510 in place of the guidance screen 520 while keeping the first learning mark image 610 displayed, and superimposes the first learning mark image 610 on the home screen 510 (step S5). Furthermore, the second controller 93 causes the third function mark 603 to be displayed in the third mark display area 513c (step S5).

[0077] Next, after a certain period of time has elapsed since the second controller 93 superimposed the first learning mark image 610 on the home screen 510, the second controller 93 erases the first learning mark image 610 from the display unit 91 (step S6) and terminates the processing shown in FIG. 9.

[0078] As described above with reference to Figs. 1 to 9, according to this embodiment, the first learning mark image 610 is superimposed on the guidance screen 520. In detail, when the worker sets a function to limit the height of the boom 3 according to the guidance screen 520, the first learning mark image 610 is superimposed on the guidance screen 520. Since the first learning mark image 610 corresponds to the third function mark 603, it is possible to allow the worker to learn the meaning of the third function mark 603. In other words, it is possible to allow the worker to learn which function of the work machine 1 the third function mark 603 represents.

[0079] Furthermore, according to this embodiment, even after the screen displayed on the display unit 91 transitions from the guidance screen 520 to the home screen 510, the first learning mark image 610 can be superimposed on the home screen 510 for a certain period of time. Therefore, the worker can view the first learning mark image 610 for a longer period of time, thereby improving the learning effect.

[0080] Furthermore, according to this embodiment, when the first learning mark image 610 is superimposed on the home screen 510, the second controller 93 executes a setting notification process. Specifically, the second controller 93 displays the third function mark 603 on the home screen 510. Therefore, the worker can visually recognize the first learning mark image 610 and the third function mark 603 at the same time. Therefore, the worker can visually recognize the relationship between the first learning mark image 610 and the third function mark 603, thereby improving the learning effect.

[0081] Moreover, according to this embodiment, the first learning mark image 610 shows an enlarged mark of the third function mark 603. Therefore, the worker can easily recognize the first learning mark image 610. Therefore, the learning effect can be improved.

[0082] Moreover, according to the present embodiment, the first learning mark image 610 is displayed at the center of the home screen 510 and the center of the guidance screen 520. Therefore, the worker can easily recognize the first learning mark image 610. This can improve the learning effect.

[0083] Furthermore, according to this embodiment, the first learning mark image 610 is displayed in an area that does not overlap with the third function mark 603. Therefore, the worker can simultaneously view the first learning mark image 610 and the third function mark 603. This can improve the learning effect.

[0084] Next, a first modified example of the work machine 1 of this embodiment will be described with reference to Fig. 10. Fig. 10 is a diagram showing another example of the display device 9 after a certain period of time has elapsed since the first learning mark image 610 was displayed on the display unit 91.

[0085] 1 to 9, the setting notification process is a process of displaying the third function mark 603 on the home screen 510 (see FIG. 7), but the setting notification process is not limited to this process. For example, as shown in FIG 10, the setting notification process may be a process of displaying the third function mark 603 and a learning message image 611 on the home screen 510.

[0086] The learning message image 611 is a character string image indicating which function of the work machine 1 the first learning mark image 610 corresponds to. By displaying the learning message image 611, the worker can learn which function of the work machine 1 the third function mark 603 represents.

[0087] Next, a second modified example of the working machine 1 of this embodiment will be described with reference to Fig. 11. Fig. 11 is a diagram showing another example of the display device 9 after a certain period of time has elapsed since the first learning mark image 610 was displayed on the display unit 91.

[0088] 11, the setting notification process may be a process of displaying the third function mark 603 on the home screen 510 and highlighting the selection item T3 "Height limit". By highlighting the selection item T3 "Height limit", the worker can learn which function of the work machine 1 the third function mark 603 represents.

[0089] Note that instead of highlighting the selection item T3 “height limit”, the selection item T3 “height limit” may be lit or flashed. Alternatively, the selection item T3 “height limit” may be colored.

[0090] [Embodiment 2] Next, a second embodiment of the present invention will be described with reference to Fig. 12 to Fig. 14. However, differences from the first embodiment will be described, and a description of the same things as in the first embodiment will be omitted. The second embodiment differs from the first embodiment in that the display device 9 displays a second learning mark image 612.

[0091] Fig. 12 is a diagram showing the display device 9 in the work machine 1 of this embodiment. In detail, Fig. 12 shows the display device 9 displaying a guidance screen 520.

[0092] 4, when the operator presses the fourth operation switch 924 while the display unit 91 is displaying the home screen 510, the second controller 93 causes the display unit 91 to display the guidance screen 520. In this embodiment, when the second controller 93 causes the screen displayed on the display unit 91 to transition from the home screen 510 to the guidance screen 520, the second controller 93 causes the display unit 91 to display a second learning mark image 612. The second learning mark image 612 is an example of a second mark.

[0093] Specifically, the second controller 93 causes the display unit 91 to display the second learning mark image 612 so that the second learning mark image 612 is superimposed on the upper part of the guidance screen 520. In more detail, the second controller 93 causes the second learning mark image 612 to be displayed above the first guidance image G1.

[0094] 7. The size of the second learning mark image 612 is not particularly limited as long as it fits in the area above the first guidance image G1 on the guidance screen 520. The size of the second learning mark image 612 may be the same as the size of the third function mark 603, or may be smaller than the third function mark 603. Alternatively, the size of the second learning mark image 612 may be larger than the third function mark 603.

[0095] Next, the display device 9 in the work machine 1 of this embodiment will be further described with reference to Fig. 13. Fig. 13 is a diagram showing the display device 9 after the operation unit 92 has accepted an instruction to set the boom height limiting function.

[0096] As shown in FIG. 13, in response to the operation unit 92 accepting an instruction to set the boom height limiting function, the second controller 93 causes the display unit 91 to display the home screen 510 instead of the guidance screen 520 while keeping the second learning mark image 612 displayed on the display unit 91. In other words, the second controller 93 causes the screen displayed on the display unit 91 to transition from the guidance screen 520 to the home screen 510. As a result, the second learning mark image 612 is superimposed on the home screen 510. In this embodiment, the second learning mark image 612 is superimposed on the upper part of the home screen 510. Specifically, the second learning mark image 612 is superimposed on the upper part of the main display area 511.

[0097] In the work machine 1 of the second embodiment, the second controller 93 executes the setting notification process in the same manner as in the first embodiment. Specifically, the second controller 93 causes the third function mark 603 to be displayed on the home screen 510.

[0098] Next, the processing executed by the second controller 93 will be described with reference to Fig. 12 to Fig. 14. Fig. 14 is a flowchart showing processing executed by the second controller 93 in the work machine 1. Specifically, Fig. 14 shows processing executed by the second controller 93 after the selection item T3 "Height limit" is selected while the home screen 510 is displayed. In other words, Fig. 14 shows processing executed by the second controller 93 after the fourth operation switch 924 is pressed while the home screen 510 is displayed on the display unit 91.

[0099] As shown in FIG. 14, when the fourth operation switch 924 is pressed while the home screen 510 is displayed on the display unit 91, the second controller 93 displays the guidance screen 520 and the second learning mark image 612 on the display unit 91, and superimposes the second learning mark image 612 on the guidance screen 520 (step S11).

[0100] After displaying the guidance screen 520 and the second learning mark image 612 on the display unit 91, the second controller 93 waits until the operator selects one of the selection items T11 “Back” and T12 “Decide” (step S12).

[0101] When the operator presses the first operation switch 921 and selects the selection item T11 “Back” (B of step S12), the second controller 93 causes the display unit 91 to display the home screen 510 (step S13), and ends the processing shown in FIG. 14.

[0102] When the operator presses the sixth operation switch 926 to select the selection item T12 “OK” (A of step S12), the second controller 93 displays the home screen 510 on the display unit 91 instead of the guidance screen 520 while keeping the second learning mark image 612 displayed, and superimposes the second learning mark image 612 on the home screen 510 (step S14). Furthermore, the second controller 93 displays the third function mark 603 in the third mark display area 513c (step S14).

[0103] Next, after a certain period of time has elapsed since the second controller 93 superimposed the second learning mark image 612 on the home screen 510, the second controller 93 erases the second learning mark image 612 from the display unit 91 (step S15) and terminates the processing shown in FIG. 14.

[0104] The second embodiment of the present invention has been described above with reference to Figs. 12 to 14. According to this embodiment, the second learning mark image 612 is superimposed on the guidance screen 520. The second learning mark image 612 corresponds to the third function mark 603. Therefore, similar to the first embodiment, it is possible to have the worker learn the meaning of the third function mark 603.

[0105] Furthermore, according to this embodiment, the second learning mark image 612 is displayed on the display unit 91 from the start of displaying the guidance screen 520. Therefore, when the worker is performing an operation to limit the height of the boom 3 according to the guidance screen 520, the second learning mark image 612 can be superimposed on the guidance screen 520. Therefore, the worker can be made to view the second learning mark image 612 for a longer period of time, thereby improving the learning effect.

[0106] [Embodiment 3] Next, a third embodiment of the present invention will be described with reference to Figures 4 and 15 to 17. However, differences from the first and second embodiments will be described, and a description of the same matters as in the first and second embodiments will be omitted. The third embodiment differs from the first and second embodiments in that a first learning mark image 610 is displayed on the display unit 91 when the boom height limiting function set in the work machine 1 is disabled.

[0107] Fig. 15 is a diagram showing the display device 9 in the work machine 1 of this embodiment. In detail, Fig. 15 shows the display device 9 displaying a selection screen 530. The selection screen 530 is a screen that allows the worker to select whether to disable the functions set in the work machine 1, or to reset the functions set in the work machine 1. In this embodiment, the selection screen 530 is a screen that allows the worker to select whether to disable the setting of the boom height limiting function, or to reset the boom height limiting function. The selection screen 530 is an example of a third screen.

[0108] As shown in Fig. 15, the selection screen 530 displays a second guidance image G2. The second guidance image G2 is an image for guiding the worker on an operation to disable a function set in the work machine 1 and an operation to reset a function set in the work machine 1. In this embodiment, the second guidance image G2 is an image for guiding the worker on an operation to disable the setting of the boom height limit function and an operation to reset the boom height limit function. For example, the second guidance image G2 may include a character string image indicating "Disable height limit" and a character string image indicating "Reset height limit".

[0109] As shown in FIG. 15, the selection screen 530 has a third selection item display area 531. The third selection item display area 531 displays various selection items. Specifically, the third selection item display area 531 displays character images (character string images) indicating the various selection items. In this embodiment, the third selection item display area 531 displays a selection item T21 "Reset" and a selection item T22 "Disable". The selection item T21 "Re-decide" is an item selected when resetting a function set in the work machine 1. The selection item T22 "Disable" is an item selected when disabling a function set in the work machine 1. In detail, the selection item T21 "Re-decide" is an item selected when resetting the boom height limiting function. The selection item T22 "Disable" is an item selected when disabling the boom height limiting function.

[0110] When the display unit 91 displays the selection screen 530, a function of selecting the selection item T21 “Reset” is assigned to the fifth operation switch 925. When the operator presses the fifth operation switch 925, the second controller 93 causes the display unit 91 to display the guidance screen 520 described in the first embodiment (see FIG. 5).

[0111] When the display unit 91 is displaying the selection screen 530, the sixth operation switch 926 is assigned a function of selecting the selection item T22 "Disabled." When the operator presses the sixth operation switch 926, the boom height limiting function is disabled. As a result, the limit on the height (maximum height) of the boom 3 is released.

[0112] Next, the display device 9 in the work machine 1 of this embodiment will be further described with reference to Fig. 16. Fig. 16 is a diagram showing the display device 9 after the operation unit 92 has accepted an instruction to disable the boom height limiting function. In other words, Fig. 6 shows the display device 9 after the operator has pressed the sixth operation switch 926.

[0113] 16, in response to the operation unit 92 accepting an instruction to disable the boom height limiting function, the second controller 93 causes the display unit 91 to display the home screen 510 instead of the selection screen 530. In other words, the second controller 93 transitions the screen displayed on the display unit 91 from the selection screen 530 to the home screen 510. In addition, in response to the operation unit 92 accepting an instruction to disable the boom height limiting function, the second controller 93 causes the display unit 91 to display the first learning mark image 610 and superimposes the first learning mark image 610 on the home screen 510. In this embodiment, the first learning mark image 610 is superimposed at the center of the home screen 510.

[0114] Furthermore, the second controller 93 executes an invalidation notification process when superimposing the first learning mark image 610 on the home screen 510. The invalidation notification process is a process of notifying, on the home screen 510, that the boom height limiting function has been invalidated. In this embodiment, the invalidation notification process is a process of erasing the third function mark 603 from the home screen 510. Therefore, as shown in FIG. 16, the third function mark 603 is erased from the third mark display area 513c.

[0115] After a certain period of time has elapsed since the second controller 93 superimposed the first learning mark image 610 on the home screen 510, the second controller 93 erases the first learning mark image 610 from the display unit 91. As a result, the home screen 510 returns to the normal state as shown in FIG.

[0116] Next, the processing executed by the second controller 93 will be described with reference to Fig. 4 and Fig. 15 to Fig. 17. Fig. 17 is a flowchart showing processing executed by the second controller 93 in the work machine 1. Specifically, Fig. 17 shows processing executed by the second controller 93 after the selection item T22 "Disable" is selected while the selection screen 530 is being displayed. In other words, Fig. 17 shows processing executed by the second controller 93 after the sixth operation switch 926 is pressed while the selection screen 530 is being displayed on the display unit 91.

[0117] As shown in FIG. 17, when the selection screen 530 is displayed on the display unit 91, the second controller 93 waits until the operator selects one of the selection item T21 “Reset” and the selection item T22 “Disable” (step S21).

[0118] When the worker presses the fifth operation switch 925 to select the selection item T21 “Reset” (B of step S21), the second controller 93 ends the process shown in Fig. 17. After the worker ends the process shown in Fig. 17 by pressing the fifth operation switch 925, the second controller 93 executes the process described with reference to Fig. 9.

[0119] When the operator presses the sixth operation switch 926 to select the selection item T22 “Disable” (A of step S2), the second controller 93 causes the display unit 91 to display the home screen 510 instead of the selection screen 530, and also causes the display unit 91 to display the first learning mark image 610, superimposing the first learning mark image 610 on the home screen 510 (step S22). Furthermore, the second controller 93 erases the third function mark 603 from the third mark display area 513c (step S22).

[0120] Next, after a certain period of time has elapsed since the second controller 93 superimposed the first learning mark image 610 on the home screen 510, the second controller 93 erases the first learning mark image 610 from the display unit 91 (step S23) and terminates the processing shown in FIG. 17.

[0121] The third embodiment of the present invention has been described above with reference to Fig. 4 and Fig. 15 to Fig. 17. According to this embodiment, when the boom height limiting function is disabled, the first learning mark image 610 is displayed. Therefore, it is possible to allow the worker to learn the meaning of the third function mark 603.

[0122] Furthermore, according to this embodiment, when the first learning mark image 610 is superimposed on the home screen 510, the second controller 93 executes an invalidation notification process. Specifically, when the first learning mark image 610 is superimposed on the home screen 510, the second controller 93 erases the third function mark 603 from the home screen 510. This allows the worker to visually recognize the relationship between the first learning mark image 610 and the third function mark 603, thereby improving the learning effect.

[0123] Moreover, according to this embodiment, the first learning mark image 610 shows an enlarged mark of the third function mark 603. Therefore, the worker can easily recognize the first learning mark image 610. Therefore, the learning effect can be improved.

[0124] Furthermore, according to this embodiment, the first learning mark image 610 is displayed in the center of the home screen 510. Therefore, the worker can easily recognize the first learning mark image 610. This can improve the learning effect.

[0125] In this embodiment, the first learning mark image 610 is superimposed on the home screen 510, but the second learning mark image 612 described in the second embodiment may be superimposed on the home screen 510.

[0126] Furthermore, in this embodiment, the second controller 93 executes the processing described with reference to FIG. 9 after terminating the processing shown in FIG. 17 by the worker pressing the fifth operation switch 925, but the second controller 93 may execute the processing described with reference to FIG. 14 after terminating the processing shown in FIG. 17 by the worker pressing the fifth operation switch 925.

[0127] In addition, in the present embodiment, the invalid notification process is a process of erasing the third function mark 603 from the home screen 510, but the invalid notification process is not limited to this process. For example, the invalid notification process may be a process of erasing the third function mark 603 from the home screen 510 and displaying a learning message image 611 (see FIG. 10) on the home screen 510. Alternatively, the invalid notification process may be a process of erasing the third function mark 603 from the home screen 510 and highlighting the selection item T3 "height limit" (see FIG. 11).

[0128] In the present embodiment, the third function mark 603 is erased in the invalidity notification process, but the invalidity notification process may be a process of blinking or lighting the third function mark 603. Alternatively, the third function mark 603 may be colored. If the third function mark 603 is not erased in the invalidity notification process, the second controller 93 erases the third function mark 603 from the home screen 510 after a certain period of time has elapsed since the first learning mark image 610 was superimposed on the home screen 510.

[0129] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 17). However, the present invention is not limited to the above embodiments, and can be implemented in various aspects without departing from the gist of the present invention. In addition, the components disclosed in the above embodiments can be modified as appropriate. For example, a certain component among all the components shown in one embodiment may be added to a component of another embodiment, or some of all the components shown in one embodiment may be deleted from the embodiment.

[0130] The drawings are mainly schematic illustrations of each component 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 configurations of each component shown in the above embodiment are merely examples and are 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.

[0131] For example, in the embodiment with reference to Figures 1 to 17, the work machine 1 is a backhoe, but the work machine 1 is not limited to a backhoe. The work machine 1 may be any machine whose functions can be set by an operator via a screen.

[0132] In the embodiment with reference to FIGS. 1 to 17, the setting notification process includes a process of displaying the third function mark 603, but the setting notification process may not include a process of displaying the third function mark 603. For example, in the setting notification process, the learning message image 611 may be displayed without displaying the third function mark 603. Alternatively, in the setting notification process, the selection item T3 "height limit" may be highlighted without displaying the third function mark 603. When the setting notification process does not include a process of displaying the third function mark 603, the second controller 93 displays the third function mark 603 on the home screen 510 after a certain period of time has elapsed since the first learning mark image 610 was superimposed on the home screen 510.

[0133] 1 to 17, the processing executed by the second controller 93 when setting the boom height limiting function has been described in the embodiment, but the same processing as when setting the boom height limiting function can be executed when setting a function other than the function for limiting the height of the boom 3. For example, when setting the arm position limiting function, a learning mark image corresponding to the second function mark 602 can be displayed on the display unit 91 to allow the operator to learn the meaning of the second function mark 602.

[0134] 1 to 17, in the embodiment, the operation unit 92 includes a plurality of operation switches (first operation switch 921 to sixth operation switch 926), but the operation unit 92 is not limited to a plurality of operation switches. For example, the operation unit 92 may include a touch sensor. The touch sensor may be superimposed on the display surface of the display unit 91. Alternatively, the operation unit 92 may include a jog dial.

[0135] Furthermore, in the embodiment described with reference to Figures 1 to 17, the second controller 93 executed the processes shown in Figures 9, 14 and 17, but the first controller 11 may execute the processes shown in Figures 9, 14 and 17, or the first controller 11 and the second controller 93 may cooperate to execute the processes shown in Figures 9, 14 and 17.

[0136] <Notes on the invention> A work machine according to the present invention includes a display unit, a reception unit, and a display processing unit. The display unit displays a first screen displaying a first mark indicating a set function, and a second screen for setting the function. The reception unit receives an instruction to set the function when the display unit is displaying the second screen. In response to the reception unit receiving the instruction to set the function, the display processing unit displays a second mark corresponding to the first mark on the display unit and superimposes the second mark on the second screen when the display unit is displaying the second screen. [Industrial Applicability]

[0137] The present invention is useful in work machines. [Explanation of symbols]

[0138] 1: Work machine 9:Display device 91:Display section 92: Operation section 93: Second controller 510: Home screen 520: Guidance screen 530: Selection screen 603:Third function mark 610: First learning mark image 611: Learning message image 612: Second learning mark image

Claims

1. 1. A control method for a work machine having a display unit that displays a first screen that displays a first mark indicating a set function, and a second screen for setting the function, comprising: when the setting of the function is selected, displaying a second mark corresponding to the first mark on the display unit; After displaying the second mark, erasing the second mark from a screen displayed on the display unit. A control method for a work machine having the above-mentioned construction.

2. The method for controlling a work machine according to claim 1 , wherein the second mark is displayed larger than the first mark.

3. before the selection of the setting of the function, the second screen is displayed on the display unit without including the second mark; 3. The control method for a work machine according to claim 1, wherein after the setting of the function is selected, the second screen including the second mark is displayed.

4. The control method for a work machine according to claim 3 , wherein the first screen to which the second screen transitions after displaying the second screen including the second mark includes the second mark.

5. The control method for a work machine according to claim 4, wherein the second mark is displayed at a position on the first screen that does not overlap with the first mark.

Images