Display device and working machine equipped with same

Abstract

To provide a display device capable of stopping the alarm sound output regardless of the type of error, and a working machine including the same.SOLUTION: A display device 9 includes a display unit 91, a control unit 94, an alarm sound output unit 92, and a reception unit 93. The control unit 94 is configured so as to, when the display unit 91 displays a second screen 520, assign a function to receive an output stop instruction representing an instruction to stop the output of the alarm sound and a function to receive a second instruction representing an instruction to transit to a first screen 510 to the reception unit 93. The control unit 94 is configured so as to, when the reception unit 93 receives an output stop instruction, stop the output of the alarm sound. The control unit 94 is configured so as to, when the reception unit 93 receives a second instruction after receiving the output stop instruction, display a first screen 510 on the display unit 91 and control the alarm sound output unit 92 to output an alarm sound.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present invention relates to a display device and a work machine equipped with the same. [Background technology]

[0002] A display device that causes an alarm sound output unit to output an alarm sound when an error occurs is known. For example, Patent Document 1 discloses a work vehicle equipped with a display device that controls an alarm buzzer. Specifically, the display device includes a plurality of operation switches and a display unit. The display device sounds an alarm buzzer when an abnormality occurs. The display device also determines whether the abnormality that has occurred is an abnormality for which the buzzer cancel function is valid. When an abnormality for which the buzzer cancel function is valid occurs, the display device assigns the buzzer cancel function to one of the plurality of operation switches and displays a buzzer cancel icon at a display position corresponding to the operation switch. When the operation switch to which the buzzer cancel function is assigned is pressed by a worker, the display device stops the alarm buzzer. On the other hand, when an abnormality for which the buzzer cancel function is not valid occurs, the display device keeps the alarm buzzer sounding. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] International Publication No. 2016 / 016978 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the display device of Patent Document 1 cannot stop the alarm buzzer when an abnormality (error) occurs for which the buzzer cancel function is not effective. Therefore, the alarm sound may be output even when a service technician is inspecting or repairing the abnormal part, and the service technician's work may be hindered by the alarm sound.

[0005] The present invention has been made in consideration of the above-mentioned problems, and has an object to provide a display device that can stop the output of an alarm sound regardless of the type of error, and a work machine equipped with the same. [Means for solving the problem]

[0006] A display device according to the present invention includes a display unit, a control unit, an alarm sound output unit, and a reception unit. The display unit displays a first screen. The control unit causes the first screen to display an image indicating that an error has occurred based on alarm information. The alarm sound output unit outputs an alarm sound based on the alarm information. The reception unit receives a first instruction indicating an instruction to transition to a second screen indicating the content of the error. The control unit causes the display unit to display the second screen when the reception unit receives the first instruction. When the display unit displays the second screen, the control unit assigns to the reception unit a function of receiving an output stop instruction indicating an instruction to stop output of the alarm sound and a function of receiving a second instruction indicating an instruction to transition from the second screen to the first screen. When the reception unit receives the output stop instruction, the control unit stops output of the alarm sound by the alarm sound output unit. When the reception unit receives the second instruction after receiving the output stop instruction, the control unit causes the display unit to display the first screen and causes the alarm sound output unit to output the alarm sound. Effect of the Invention

[0007] According to the present invention, the output of the alarm sound can be stopped regardless of the type of error. [Brief description of the drawings]

[0008] [Figure 1] 1 is a side view of a work machine according to an 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] 1 is a diagram showing a display device according to an embodiment of the present invention; [Diagram 5] FIG. 13 is a diagram showing a display device displaying an error notification image and an alarm mark image. [Figure 6] FIG. 13 is a diagram showing a home screen displayed on the display device when only errors of a second warning level have occurred. [Figure 7] FIG. 13 is a diagram showing a display device displaying an error information screen. [Figure 8] FIG. 13 is a diagram showing a display device displaying an error information details screen. [Figure 9] 10 is a flowchart showing a process executed by a third controller in the display device. [Figure 10] 10 is a flowchart showing another process executed by a third controller in the display device. [Figure 11] FIG. 13 is a diagram showing a modified example of the display device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the display device and the work machine of the present invention will be described with reference to the drawings (FIGS. 1 to 11). However, the present invention is not limited to the following embodiment. Note that where the explanation overlaps, the explanation may be omitted as appropriate. In addition, in the drawings, the same or corresponding parts are given the same reference symbols and the explanation will not be repeated.

[0010] 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 12 (see FIG. 3), 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 12 (see FIG. 3), a fuel tank, a battery, a hydraulic system, and a 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 extends and retracts, causing the boom 3 to swing about the first rotation fulcrum P1. More specifically, the boom actuator 30 is extended and retracted by controlling the supply of hydraulic oil to the boom actuator 30 and the discharge of hydraulic oil from the boom actuator 30. Therefore, the boom actuator 30 extends and retracts due to the hydraulic oil.

[0014] 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.

[0015] The arm actuator 40 operates the arm 4. Specifically, the arm actuator 40 extends and retracts, causing the arm 4 to swing about the second rotation fulcrum P2. More specifically, the arm actuator 40 is extended and retracted by controlling the supply of hydraulic oil to the arm actuator 40 and the discharge of hydraulic oil from the arm actuator 40. Therefore, the arm actuator 40 extends and retracts due to the hydraulic oil.

[0016] 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.

[0017] The attachment actuator 50 operates the bucket 5. Specifically, the bucket 5 swings about the third rotation fulcrum P3 as the attachment actuator 50 extends and retracts. More specifically, the attachment actuator 50 is extended and retracted by controlling the supply of hydraulic oil to the attachment actuator 50 and the discharge of hydraulic oil from the attachment actuator 50. Therefore, the attachment actuator 50 extends and retracts due to the hydraulic oil.

[0018] The traveling device 7 causes the working machine 1 to travel. In this embodiment, the traveling device 7 is a crawler type traveling device.

[0019] 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.

[0020] 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.

[0021] The control unit 8 includes various operating members that enable the operator to operate the work machine 1. The various operating members include a swing pedal 81, a PTO pedal 82, a boom operating lever 83, and an arm operating lever 84.

[0022] The swing pedal 81 is a foot pedal. An operator operates the swing pedal 81 with his / her foot. By operating the swing pedal 81, the operator can rotate the boom 3 to the left and right via the swing bracket by the swing cylinder.

[0023] The PTO pedal 82 is a foot pedal. An operator operates the PTO pedal 82 with his / her foot. By operating the PTO pedal 82, the operator can drive an attachment attached to the PTO port.

[0024] An operator manually operates the boom operation lever 83 and the arm operation lever 84. The operator can operate the boom 3 by operating the boom operation lever 83. In addition, the operator can operate the arm 4 by operating the arm operation lever 84.

[0025] The display device 9 displays various screens. In detail, as will be described later with reference to Figs. 4 to 6 etc., the display device 9 displays a home screen 510. Furthermore, as will be described later with reference to Fig. 7 etc., the display device 9 displays an error information screen 520. Furthermore, as will be described later with reference to Fig. 8 etc., the display device 9 displays an error information details screen 530.

[0026] Next, the configuration of the work machine 1 of this embodiment will be further described with reference to Figs. 1 to 3. Fig. 3 is a block diagram of the work machine 1. As shown in Fig. 3, the work machine 1 further includes a first controller 11, an engine 12, and a second controller 13. The work machine 1 also includes various sensors. In this embodiment, the work machine 1 includes an accelerator sensor 101, a cooling water temperature sensor 102, and a hydraulic oil temperature sensor 103. The steering unit 8 also includes an accelerator volume 85.

[0027] The engine 12 generates a driving force for driving the traveling device 7. The second controller 13 controls the engine 12 based on commands transmitted from the first controller 11.

[0028] The second controller 13 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 second controller 13 is configured by, for example, an ECU (Electronic Control Unit).

[0029] An operator manually operates the accelerator volume 85. The accelerator volume 85 is electrically connected to the second controller 13. When the operator operates the accelerator volume 85 to rotate forward or backward, the rotation speed of the engine 12 increases or decreases.

[0030] The accelerator sensor 101 detects the operation position (rotation position) of the accelerator volume 85. The first controller 11 transmits a command for controlling the amount of fuel injected into the engine 12 and the injection timing to the second controller 13 based on the operation position of the accelerator volume 85 detected by the accelerator sensor 101.

[0031] Furthermore, the first controller 11 determines whether or not the operation position of the accelerator volume 85 detected by the accelerator sensor 101 indicates an abnormal value (outlier). For example, the first controller 11 may determine whether or not the operation position of the accelerator volume 85 detected by the accelerator sensor 101 indicates an abnormal value (outlier) by comparing the operation position of the accelerator volume 85 detected by the accelerator sensor 101 with a threshold value.

[0032] The coolant temperature sensor 102 detects the temperature of the coolant circulating inside the engine 12. The first controller 11 determines whether or not the temperature of the coolant detected by the coolant temperature sensor 102 indicates an abnormal value (outlier). For example, the first controller 11 may determine whether or not the temperature of the coolant detected by the coolant temperature sensor 102 indicates an abnormal value (outlier) by comparing the temperature of the coolant detected by the coolant temperature sensor 102 with a threshold value.

[0033] The hydraulic oil temperature sensor 103 detects the temperature of the hydraulic oil. The first controller 11 determines whether or not the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 103 indicates an abnormal value (outlier). For example, the first controller 11 may determine whether or not the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 103 indicates an abnormal value (outlier) by comparing the temperature of the hydraulic oil detected by the hydraulic oil temperature sensor 103 with a threshold value.

[0034] 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 first controller 11 is configured by, for example, an ECU.

[0035] When the first controller 11 detects that an error has occurred in the work machine 1, it transmits warning information to the display device 9. The warning information indicates that an error has occurred in the work machine 1. In particular, the warning information includes information indicating the error name, information indicating the error code, and information indicating the warning level. The warning information also includes information indicating a method of dealing with the error. The error name, error code, warning level, and method of dealing with the error are set in advance for each error that is expected to occur in the work machine 1. In this embodiment, the first controller 11 is an example of a transmitting unit.

[0036] Specifically, when the first controller 11 determines that the operation position of the accelerator volume 85 detected by the accelerator sensor 101 indicates an abnormal value (outlier), it transmits warning information to the display device 9. Similarly, when the first controller 11 determines that the coolant temperature detected by the coolant temperature sensor 102 indicates an abnormal value (outlier), it transmits warning information to the display device 9. In addition, when the first controller 11 determines that the hydraulic oil temperature detected by the hydraulic oil temperature sensor 103 indicates an abnormal value (outlier), it transmits warning information to the display device 9.

[0037] The display device 9 includes a display unit 91 , an alarm sound output unit 92 , an operation unit 93 , and a third controller 94 .

[0038] The display unit 91 is configured with a display such as a liquid crystal display or an organic EL display. The display unit 91 displays an image indicating that an error has occurred based on the alarm information. Specifically, the third controller 94 causes the display unit 91 to display an image indicating that an error has occurred based on the alarm information.

[0039] The alarm sound output unit 92 outputs an alarm sound based on the alarm information. Specifically, the third controller 94 causes the alarm sound output unit 92 to output an alarm sound based on the alarm sound information. In other words, when an error occurs in the work machine 1, an alarm sound is output from the alarm sound output unit 92. Therefore, the operator can audibly recognize that an error has occurred in the work machine 1. The alarm sound output unit 92 is, for example, a buzzer.

[0040] The third controller 94 may cause the alarm sound output unit 92 to output different alarm sounds depending on the alarm level. Specifically, in this embodiment, the alarm levels include a first alarm level and a second alarm level. For example, the third controller 94 may cause the alarm sound output unit 92 to output a continuous sound when an error of the first alarm level has occurred in the work machine 1, and may cause the alarm sound output unit 92 to output an intermittent sound when only an error of the second alarm level has occurred in the work machine 1. The alarm sound output unit 92 outputs different alarm sounds depending on the alarm level, allowing the operator to auditorily recognize the alarm level of the error occurring in the work machine 1.

[0041] The operation unit 93 is operated by an operator to receive various instructions. The operator can operate the operation unit 93 to input various instructions to the third controller 94. The operation unit 93 is an example of a receiving unit. The operation unit 93 receives, for example, an instruction to stop outputting an alarm sound.

[0042] The third controller 94 displays various screens on the display unit 91 based on various information transmitted from the first controller 11. The third controller 94 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 third controller 94 is constituted by, for example, an ECU. The third controller 94 is an example of a control unit.

[0043] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 10. Fig. 4 is a diagram showing the display device 9 of this embodiment. In detail, Fig. 4 shows the display device 9 displaying a home screen 510. The home screen 510 is an example of a first screen. The home screen 510 displays, for example, a fuel level gauge, a coolant temperature gauge, and a hydraulic oil temperature gauge.

[0044] 4, the home screen 510 has a first selection item display area 511 and a first notification area 512. The first selection item display area 511 displays various selection items. Specifically, the first selection item display area 511 displays a character image (character string image) or a mark indicating the various selection items. The mark is, for example, an icon, a figure, or a pictogram.

[0045] In this embodiment, the operation unit 93 includes a plurality of operation switches. Specifically, the operation unit 93 includes a first operation switch 931 to a sixth operation switch 936. The first operation switch 931 to the sixth operation switch 936 correspond one-to-one to the selection items displayed in the first selection item display area 511. When the display unit 91 is displaying the home screen 510, the first operation switch 931 to the sixth operation switch 936 are assigned a function of selecting a corresponding one of the selection items displayed in the first selection item display area 511. In other words, the first operation switch 931 to the sixth operation switch 936 each accept an instruction to select a corresponding item.

[0046] For example, a function of selecting a selection item T1 is assigned to the sixth operation switch 936. The selection item T1 is an item for switching information displayed in the first notification area 512. For example, every time the operator presses the sixth operation switch 936, the third controller 94 switches the information displayed in the first notification area 512 between information indicating the RPM of the engine 12 and information indicating the remaining amount of fuel.

[0047] The home screen 510 further has a second notification area 513. When the first controller 11 detects the occurrence of an error, the third controller 94 displays an error notification image 610 and an alarm mark image 620, which will be described with reference to FIG. 5 etc., in the second notification area 513. FIG. 4 shows the home screen 510 displayed on the display unit 91 when the first controller 11 has not detected the occurrence of an error. Therefore, the error notification image 610 and the alarm mark image 620 are not displayed in the second notification area 513. In the following description, the second notification area 513 may be referred to as the "error notification area 513".

[0048] Next, the display device 9 will be further described with reference to Figures 1 to 5. Figure 5 is a diagram showing the display device 9 displaying an error notification image 610 and an alarm mark image 620.

[0049] 5, the third controller 94 displays an error notification image 610 and an alarm mark image 620 on the home screen 510 based on the alarm information. Therefore, the operator can visually recognize that an error has occurred in the work machine 1.

[0050] In detail, the third controller 94 displays an error notification image 610 and an alarm mark image 620 in the error notification area 513. The error notification image 610 and the alarm mark image 620 are examples of images indicating that an error has occurred. The error notification image 610 is a character string image indicating that an error has occurred. The alarm mark image 620 is a mark image indicating that an error has occurred. Specifically, the alarm mark image 620 indicates an alarm level.

[0051] As described with reference to Fig. 3, in this embodiment, the alarm levels include a first alarm level and a second alarm level. The first alarm level is set for errors that require the work machine 1 to be stopped. The second alarm level is set for errors that do not require the work machine 1 to be stopped. Therefore, when only errors of the second alarm level have occurred, the operator may continue working with the work machine 1.

[0052] 5 shows an alarm mark image 620 corresponding to the first alarm level. Hereinafter, the alarm mark image 620 corresponding to the first alarm level may be referred to as a "first alarm mark image 620a." When at least one error of the first alarm level has occurred in the work machine 1, the third controller 94 causes the first alarm mark image 620a to be displayed in the error notification area 513. Therefore, the display of the first alarm mark image 620a on the home screen 510 (error notification area 513) enables the operator to visually recognize that an error of the first alarm level has occurred in the work machine 1.

[0053] The third controller 94 determines the background color of the error notification area 513 based on the warning level. In other words, the third controller 94 changes the background color of the error notification area 513 in accordance with the warning level. Specifically, when a first warning level error has occurred, the background color of the error notification area 513 is determined to be "red." Therefore, the worker can visually recognize from the background color of the error notification area 513 that a first warning level error has occurred in the work machine 1.

[0054] The first alarm mark image 620a is made up of a character string image 621a and a graphic image 622a. The character string image 621a is arranged inside the graphic image 622a. The outline of the graphic image 622a and the character string image 621a are white, and the color inside the graphic image 622a (background color) is red.

[0055] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 5. As shown in Fig. 5, the third controller 94 displays a selection item T2 in the first selection item display area 511 based on the alarm information. The selection item T2 is an item selected when transitioning the screen displayed on the display unit 91 from the home screen 510 to an error information screen 520 which will be described with reference to Fig. 7. By displaying the selection item T2 in the first selection item display area 511, the operation unit 93 can receive an instruction to transition to the error information screen 520.

[0056] In detail, by displaying the selection item T2 in the first selection item display area 511, a function of selecting the selection item T2 is assigned to one of the first operation switch 931 to the sixth operation switch 936. In this embodiment, the selection item T2 is displayed instead of the selection item T1 described with reference to Fig. 4. Therefore, the function of selecting the selection item T2 is assigned to the sixth operation switch 936.

[0057] Furthermore, in this embodiment, an alarm mark image 620 is displayed as selection item T2. In the example shown in Fig. 5, the alarm mark image 620 is a first alarm mark image 620a. In this way, by displaying the alarm mark image 620 as selection item T2, the operator can more easily recognize the operation switch for transitioning to the error information screen 520. Also, by displaying the first alarm mark image 620a as selection item T2, the operator can visually recognize that a first alarm level error has occurred in the work machine 1.

[0058] Next, the display device 9 will be further described with reference to Figures 1 to 6. Figure 6 is a diagram showing a home screen 510 that is displayed on the display device 9 when only errors of the second warning level have occurred.

[0059] As shown in FIG. 6, when only errors of the second alarm level have occurred, the third controller 94 displays an alarm mark image 620 corresponding to the second alarm level in the error notification area 513. Hereinafter, the alarm mark image 620 corresponding to the second alarm level may be referred to as a "second alarm mark image 620b." According to this embodiment, when only errors of the second alarm level have occurred, the second alarm mark image 620b is displayed in the error notification area 513. Therefore, by displaying the second alarm mark image 620b on the home screen 510 (error notification area 513), the operator can visually recognize that the only errors occurring in the work machine 1 are errors of the second alarm level.

[0060] When only second alarm level errors have occurred, the third controller 94 determines the background color of the error notification area 513 to be "yellow." Therefore, the worker can visually recognize from the background color of the error notification area 513 that only second alarm level errors have occurred in the work machine 1.

[0061] Furthermore, when only a second alarm level error has occurred, the third controller 94 displays the second alarm mark image 620b as a selection item T2 in the first selection item display area 511. By displaying the second alarm mark image 620b as the selection item T2 in this manner, the operator can visually recognize that only a second alarm level error has occurred in the work machine 1.

[0062] The second alarm mark image 620b is made up of a character string image 621b and a graphic image 622b. The character string image 621b is arranged inside the graphic image 622b. The outline of the graphic image 622b and the character string image 621b are white, and the color inside the graphic image 622b (background color) is yellow.

[0063] Next, the display device 9 will be further described with reference to Figs. 1 to 7. Fig. 7 is a diagram showing the display device 9 displaying an error information screen 520. The error information screen 520 is an example of the second screen. When the selection item T2 described with reference to Figs. 5 and 6 is selected, the third controller 94 causes the display unit 91 to display the error information screen 520. In other words, when the sixth operation switch 936 is pressed while the selection item T2 is displayed in the first selection item display area 511, the third controller 94 causes the display unit 91 to display the error information screen 520. The error information screen 520 is a screen showing the content of an error that has occurred in the work machine 1.

[0064] 7, the error information 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 character images (character string images) or marks indicating the various selection items.

[0065] A selection item T11 and a selection item T12 are displayed in the second selection item display area 521. The selection item T11 is an item selected when returning to the home screen 510. The selection item T12 is an item selected when stopping the output of the alarm sound.

[0066] When the display unit 91 displays the error information screen 520, the first operation switch 931 is assigned a function of selecting the selection item T11. That is, the third controller 94 assigns to the first operation switch 931 a function of receiving an instruction to transition from the error information screen 520 to the home screen 510. When the operation unit 93 receives an instruction to transition from the error information screen 520 to the home screen 510, the third controller 94 displays the home screen 510 on the display unit 91. Specifically, when the worker presses the first operation switch 931, the third controller 94 displays the home screen 510 on the display unit 91. In the following description, the transition from the error information screen 520 to the home screen 510 may be referred to as a "transition to the home screen 510."

[0067] When the display unit 91 displays the error information screen 520, the fifth operation switch 935 is assigned a function of selecting the selection item T12. That is, the third controller 94 assigns to the fifth operation switch 935 a function of receiving an output stop instruction, which is an instruction to stop the output of an alarm sound. When the operation unit 93 receives the output stop instruction, the third controller 94 stops the output of the alarm sound by the alarm sound output unit 92. Specifically, when the worker presses the fifth operation switch 935, the third controller 94 stops the output of the alarm sound by the alarm sound output unit 92.

[0068] In this embodiment, when a first alarm level error has occurred in the work machine 1, if the operation unit 93 receives an instruction to transition to the home screen 510 after receiving an instruction to stop output, the third controller 94 causes the display unit 91 to display the home screen 510 and causes the alarm sound output unit 92 to output an alarm sound. Therefore, even if the output of the alarm sound has been stopped, after the screen displayed on the display unit 91 is returned to the home screen 510, the operator can be made to recognize again that a first alarm level error has occurred in the work machine 1.

[0069] Furthermore, in this embodiment, when only a second alarm level error has occurred in the work machine 1, if the operation unit 93 receives an instruction to stop output and then an instruction to transition to the home screen 510 is received, the third controller 94 causes the display unit 91 to display the home screen 510 and maintains the stop of the output of the alarm sound. As described with reference to FIG. 5, a second alarm level error is an error that does not require the work machine 1 to be stopped, and when only a second alarm level error has occurred, the worker may continue working with the work machine 1. According to this embodiment, when the worker returns the screen displayed on the display unit 91 to the home screen 510 after instructing to stop the output of the alarm sound and continues working with the work machine 1, the worker can perform the work without being hindered by the alarm sound.

[0070] Furthermore, in this embodiment, when the operation unit 93 receives an instruction to transition to the home screen 510, the third controller 94 causes the display unit 91 to display the home screen 510 described with reference to Fig. 5 or the home screen 510 described with reference to Fig. 6. Specifically, when a first alarm level error has occurred in the work machine 1, when the operation unit 93 receives an instruction to transition to the home screen 510, the third controller 94 causes the display unit 91 to display the home screen 510 described with reference to Fig. 5. Furthermore, when only a second alarm level error has occurred in the work machine 1, when the operation unit 93 receives an instruction to transition to the home screen 510, the third controller 94 causes the display unit 91 to display the home screen 510 described with reference to Fig. 6.

[0071] Therefore, when the third controller 94 causes the display unit 91 to display the home screen 510, it causes the selection item T2 to be displayed in the first selection item display area 511. As a result, the worker can cause the display unit 91 to display the error information screen 520 again after returning the screen to be displayed on the display unit 91 from the error information screen 520 to the home screen 510.

[0072] Furthermore, according to this embodiment, even if the output of the alarm sound is stopped when only a second alarm level error is occurring in the work machine 1, the worker can visually confirm on the home screen 510 that an error has occurred in the work machine 1.

[0073] Next, the display device 9 will be further described with reference to Figs. 1 to 7. As shown in Fig. 7, the third controller 94 displays error information 700 on the error information screen 520 based on the alarm information. The error information 700 indicates the content of the error that has occurred in the work machine 1. Therefore, the operator can easily recognize the content of the error that has occurred in the work machine 1. Specifically, the error information 700 indicates an error code 701, an error name 702, and an alarm mark image 620. The third controller 94 displays the error code 701, the error name 702, and the alarm mark image 620 in association with each other on the error information screen 520.

[0074] Therefore, according to this embodiment, it is possible to allow the operator to easily recognize the content of the error that has occurred in the work machine 1. In addition, it is possible to allow the operator to easily recognize the warning level of the error that has occurred in the work machine 1.

[0075] When multiple errors have occurred in the work machine 1, the third controller 94 displays a list of the error information 700 on the error information screen 520. Therefore, the worker can easily recognize the content of each of the multiple errors.

[0076] FIG. 7 shows an example in which five pieces of error information 700 are displayed on the error information screen 520. Specifically, the error information screen 520 displays a first error information 710 to a fifth error information 750. More specifically, the error information screen 520 has a first error information display area 522 to a fifth error information display area 526. The first error information display area 522 to the fifth error information display area 526 are disposed above the second selection item display area 521. The first error information display area 522 to the fifth error information display area 526 are arranged in this order toward the second selection item display area 521. The third controller 94 causes the first error information 710 to the fifth error information 750 to be displayed in the first error information display area 522 to the fifth error information display area 526, respectively.

[0077] In the example shown in FIG. 7, the first error information 710 and the second error information 720 indicate a first warning level, and the third error information 730 to the fifth error information 750 indicate a second warning level. As shown in FIG. 7, the third controller 94 displays a plurality of pieces of error information 700 collectively by warning level. Therefore, according to this embodiment, the operator can easily recognize the warning level of an error occurring in the work machine 1. The third controller 94 arranges the plurality of pieces of error information 700 having the same warning level in the order in which the errors occurred. In the example shown in FIG. 7, the first error information 710 and the second error information 720 are arranged in the order in which the errors occurred. Similarly, the third error information 730 to the fifth error information 750 are arranged in the order in which the errors occurred.

[0078] 7, the third controller 94 displays error information 700 indicating a first warning level above error information 700 indicating a second warning level. That is, the third controller 94 displays error information 700 with a higher warning level above error information 700 with a lower warning level. In this manner, the third controller 94 displays the multiple pieces of error information 700 in descending order from the error information 700 with the highest warning level. Therefore, according to this embodiment, it is possible to allow the operator to easily recognize the warning level of an error that has occurred in the work machine 1.

[0079] Furthermore, the third controller 94 determines the background colors of the first error information display area 522 to the fifth error information display area 526 based on the warning level indicated by the error information 700 to be displayed in the first error information display area 522 to the fifth error information display area 526. For example, the third controller 94 determines the background color of the area displaying the error information 700 indicating the first warning level to be red, and determines the background color of the area displaying the error information 700 indicating the second warning level to be yellow. In the example shown in Fig. 7, the background colors of the first error information display area 522 and the second error information display area 523 are red, and the background colors of the third error information display area 524 to the fifth error information display area 526 are yellow.

[0080] In this way, by changing the background colors of the first error information display area 522 to the fifth error information display area 526 according to the warning level indicated by the error information 700 displayed in the first error information display area 522 to the fifth error information display area 526, it is possible to allow the operator to easily recognize the warning level of the error that has occurred in the work machine 1. The first error information display area 522 to the fifth error information display area 526 are one example of a partitioned area.

[0081] Next, the display device 9 will be further described with reference to Fig. 1 to Fig. 7. As shown in Fig. 7, the third controller 94 displays a cursor 705 on the error information screen 520. The cursor 705 designates error information 700. In the example shown in Fig. 7, the cursor 705 designates first error information 710.

[0082] 7, selection items T13, T14, and T15 are further displayed in second selection item display area 521. Selection item T13 is an item selected when cursor 705 is moved downward. Selection item T14 is an item selected when cursor 705 is moved upward. Selection item T15 is an item selected when error information details screen 530, which will be described with reference to FIG. 8, is displayed.

[0083] When the display unit 91 is displaying the error information screen 520, a function of selecting the selection item T13 is assigned to the third operation switch 933. Therefore, when the operator presses the third operation switch 933, the third controller 94 moves the cursor 705 to the position one step below.

[0084] When the display unit 91 is displaying the error information screen 520, a function of selecting the selection item T14 is assigned to the fourth operation switch 934. Therefore, when the operator presses the fourth operation switch 934, the third controller 94 moves the cursor 705 to the next higher position.

[0085] When the display unit 91 is displaying the error information screen 520, the sixth operation switch 936 is assigned a function of selecting the selection item T15. Therefore, when the worker presses the sixth operation switch 936, the third controller 94 transitions the screen displayed on the display unit 91 from the error information screen 520 to an error information details screen 530, which will be described with reference to Fig. 8. In detail, when the sixth operation switch 936 is pressed, the third controller 94 causes the display unit 91 to display a screen that displays details of the error information 700 designated by the cursor 705.

[0086] 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 displaying an error information details screen 530. As shown in Fig. 8, the third controller 94 causes the display unit 91 to display the error information details screen 530 based on the alarm information.

[0087] The error information details screen 530 displays the alarm mark image 620, an error code 701, an error name 702, and a message 703. The message 703 is a character string image indicating how to deal with the error.

[0088] The error information details 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) or marks indicating the various selection items.

[0089] A selection item T21 and a selection item T22 are displayed in the third selection item display area 531. The selection item T21 is an item selected when returning to the error information screen 520. The selection item T22 is an item selected when stopping the output of the alarm sound.

[0090] When the display unit 91 is displaying the error information details screen 530, a function of selecting the selection item T21 is assigned to the first operation switch 931. Therefore, when the worker presses the first operation switch 931, the third controller 94 causes the display unit 91 to display the error information screen 520.

[0091] When the display unit 91 displays the error information details screen 530, a function of selecting the selection item T22 is assigned to the fifth operation switch 935. Therefore, when the operator presses the fifth operation switch 935, the third controller 94 causes the alarm sound output unit 92 to stop outputting the alarm sound.

[0092] Next, the processing executed by the third controller 94 will be described with reference to Fig. 1 to Fig. 9. Fig. 9 is a flowchart showing the processing executed by the third controller 94 in the display device 9. Specifically, Fig. 9 shows the processing executed by the third controller 94 after alarm information is transmitted from the first controller 11 to the third controller 94.

[0093] As shown in FIG. 9, when the third controller 94 receives alarm information from the first controller 11, it executes the processes of steps S1 and S2.

[0094] First, the third controller 94 causes the alarm sound output unit 92 to output an alarm sound based on the alarm information (step S1).

[0095] Next, the third controller 94 displays the error notification image 610 in the error notification area 513 of the home screen 510 based on the warning information (Step S2).

[0096] Furthermore, the third controller 94 displays an alarm mark image 620 in the error notification area 513 of the home screen 510 based on the alarm information (step S2). Specifically, when the alarm level indicated by the alarm information is the first alarm level, the third controller 94 displays the first alarm mark image 620a, and when the alarm level indicated by the alarm information is the second alarm level, the third controller 94 displays the second alarm mark image 620b. Note that when a first alarm level error occurs, the third controller 94 displays the first alarm mark image 620a until the error is resolved.

[0097] Furthermore, the third controller 94 changes one of the selection items displayed in the first selection item display area 511 to selection item T2 based on the alarm information (step S2), and ends the processing shown in Fig. 9. In this embodiment, the third controller 94 changes the selection item T1 to selection item T2.

[0098] Next, other processing executed by the third controller 94 will be described with reference to Fig. 1 to Fig. 10. Fig. 10 is a flowchart showing other processing executed by the third controller 94 on the display device 9. Specifically, Fig. 10 shows processing executed by the third controller 94 after the selection item T11 is selected while the error information screen 520 is being displayed. That is, Fig. 10 shows processing executed by the third controller 94 after the first operation switch 931 is pressed while the error information screen 520 is being displayed on the display unit 91.

[0099] As shown in FIG. 10, when the first operation switch 931 is pressed while the error information screen 520 is displayed on the display unit 91, the third controller 94 determines whether or not the output of the alarm sound has stopped (step S11).

[0100] When it is determined that the output of the alarm sound has stopped (Yes in step S11), the third controller 94 determines whether or not the alarm level of the error occurring in the work machine 1 includes the first alarm level, based on the alarm information (step S12). Note that the third controller 94 stores the alarm level received from the first controller 11.

[0101] When the third controller 94 determines that the warning levels of the error occurring in the work machine 1 include the first warning level (Yes in step S12), it causes the warning sound output unit 92 to output a warning sound (step S13) and causes the display unit 91 to display the home screen 510 (step S14). After causing the display unit 91 to display the home screen 510, the third controller 94 ends the processing shown in Fig. 10.

[0102] On the other hand, if the third controller 94 determines that the output of the alarm sound has not stopped (No in step S11), it causes the display unit 91 to display the home screen 510 (step S14), and ends the processing shown in FIG.

[0103] Furthermore, if the third controller 94 determines that the warning level of the error occurring in the work machine 1 does not include the first warning level (No in step S12), it causes the display unit 91 to display the home screen 510 (step S14) and terminates the processing shown in FIG. 10.

[0104] 1 to 10, according to this embodiment, the operation unit 93 can receive an output stop instruction whether the alarm level is the first alarm level or the second alarm level. Therefore, the output of the alarm sound can be stopped regardless of the type of error.

[0105] The embodiments of the present invention have been described above with reference to the drawings (FIGS. 1 to 10). 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 the components of another embodiment, or some of all the components shown in one embodiment may be deleted from the embodiment.

[0106] 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.

[0107] For example, in the embodiment described with reference to Figures 1 to 10, when only a second alarm level error occurs, after the output of the alarm sound is stopped, when the screen displayed on the display unit 91 is transitioned from the error information screen 520 to the home screen 510, the third controller 94 maintains the stop of the output of the alarm sound, but the third controller 94 may output an alarm sound as in the case when a first alarm level error occurs.

[0108] 1 to 10, 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 that is equipped with a display device that controls an alarm sound output unit.

[0109] In the embodiment described with reference to FIGS. 1 to 10, the operation unit 93 includes a plurality of operation switches (first operation switch 931 to sixth operation switch 936), but the operation unit 93 is not limited to a plurality of operation switches. For example, the operation unit 93 may include a touch sensor. The touch sensor may be superimposed on the display surface of the display unit 91. Alternatively, the operation unit 93 may include a jog dial.

[0110] Furthermore, in the embodiment described with reference to Figures 1 to 10, the third controller 94 executed the processing shown in Figures 9 and 10, but the first controller 11 may execute the processing shown in Figures 9 and 10, or the first controller 11 and the third controller 94 may cooperate to execute the processing shown in Figures 9 and 10.

[0111] Furthermore, in the embodiment described with reference to Figures 1 to 10, the third controller 94 changes one of the selection items displayed in the first selection item display area 511 to selection item T2, but as shown in Figure 11, a specific area 514 for displaying selection item T2 may be provided in the first selection item display area 511.

[0112] A modified example of the display device 9 of this embodiment will be described below with reference to Fig. 11. Fig. 11 is a diagram showing a modified example of the display device 9 of this embodiment. In detail, Fig. 11 shows a modified example of the home screen 510 that the display device 9 displays before alarm information is transmitted from the first controller 11 to the third controller 94.

[0113] 11 has a specific area 514 in a first selection item display area 511. If the first controller 11 has not detected the occurrence of an error, no selection item is displayed in the specific area 514. When the third controller 94 receives alarm information from the first controller 11, it displays a selection item T2 in the specific area 514. [Industrial Applicability]

[0114] The present invention is useful for a display device and a work machine. [Explanation of symbols]

[0115] 1. Work Machinery 9 Display device 91 Display section 92 Alarm sound output section 93 Operation section 94 Third Controller 510 Home Screen 511 First selection item display area 513 Second notification area (error notification area) 520 Error information screen 521 Second selection item display area 522 First error information display area 523 Second error information display area 524 Third error information display area 526 Fifth error information display area 610 Error notification image 620 Warning Mark Image 620a First alarm mark image 620b Second alarm mark image 700 Error Information T2 Selection items T11 Selection items T12 Selection items

Claims

1. A display unit that displays a first screen including a gauge image showing status information of a work machine; a control unit that displays, on the first screen, a warning image indicating that an error has occurred based on warning information; an alarm sound output unit that outputs an alarm sound based on the alarm information; a reception unit that receives a first instruction indicating an instruction to transition to a second screen showing the content of the error; Equipped with When the reception unit receives the first instruction, the control unit causes the display unit to display the second screen while maintaining the output of the alarm sound; the control unit assigns, to the reception unit, a function of receiving an output stop instruction indicating an instruction to stop output of the alarm sound when the display unit displays the second screen, and a function of receiving a second instruction indicating an instruction to transition from the second screen to the first screen; When the reception unit receives the output stop instruction while the output of the alarm sound is continuing and the second screen is being displayed, the control unit stops the output of the alarm sound by the alarm sound output unit, The control unit, when receiving the second instruction while the receiving unit has received the output stop instruction and the output of the alarm sound has been stopped, causes the display unit to display the first screen including the alarm image instead of the second screen, and causes the alarm sound output unit to output the alarm sound.

2. A display unit for displaying a first screen; a control unit that displays an image indicating that an error has occurred on the first screen based on the alarm information; an alarm sound output unit that outputs an alarm sound based on the alarm information; a reception unit that receives a first instruction indicating an instruction to transition to a second screen showing the content of the error; Equipped with When the reception unit receives the first instruction, the control unit causes the display unit to display the second screen; the control unit assigns, to the reception unit, a function of receiving an output stop instruction indicating an instruction to stop output of the alarm sound when the display unit displays the second screen, and a function of receiving a second instruction indicating an instruction to transition from the second screen to the first screen; When the reception unit receives the output stop instruction while the second screen is being displayed, the control unit stops output of the alarm sound by the alarm sound output unit, When the control unit receives the second instruction after the reception unit receives the output stop instruction, the control unit causes the display unit to display the first screen instead of the second screen, and causes the alarm sound output unit to output the alarm sound, the warning information includes information indicating a warning level set for the error, the warning level includes a first warning level and a second warning level, When the warning level set for the error is the first warning level, when the reception unit receives the second instruction after receiving the output stop instruction, the control unit causes the display unit to display the first screen and causes the warning sound output unit to output the warning sound, When the alarm level set for the error is the second alarm level, when the control unit receives the second instruction after the receiving unit receives the output stop instruction, the control unit displays the first screen on the display unit and maintains the stop of output of the alarm sound.

3. the first screen includes a selection item display area that displays selection items; The reception unit receives an instruction to select the selection item, The display device according to claim 1 , wherein the control unit causes the selection item display area to display, as the selection item, an item corresponding to the first instruction, based on the alarm information.

4. The display device according to claim 3 , wherein the item corresponding to the first instruction includes an alarm mark image indicating that the error has occurred.

5. the warning information includes information indicating a warning level set for the error, the warning level includes a first warning level and a second warning level, the warning mark image includes a first warning mark image corresponding to the first warning level and a second warning mark image corresponding to the second warning level, The display device according to claim 4 , wherein the control unit causes the first warning mark image or the second warning mark image to be displayed in the selection item display area depending on the warning level set for the error.

6. 6. The display device according to claim 3, wherein when the receiving unit receives the second instruction, the control unit causes the display unit to display the first screen and causes an item corresponding to the first instruction to be displayed in the selection item display area.

7. The display device according to claim 1 , wherein, when a plurality of errors have occurred, the control unit causes the second screen to display a list of contents of each of the plurality of errors.

8. Each of the plurality of errors is set to one of a plurality of warning levels; The display device according to claim 7 , wherein the control unit causes the second screen to display contents of the plurality of errors collectively for each of the warning levels.

9. Each of the plurality of errors is set to one of a plurality of warning levels; The control unit, based on the warning level set for each of the plurality of errors, The display device according to claim 7 or 8, wherein the contents of the plurality of errors are displayed in descending order.

10. the second screen includes a partitioned area for displaying the content of the error, the warning information includes information indicating a warning level set for the error, The display device according to claim 1 , wherein the control unit determines a background color of the divided area based on the warning level set for the error.

11. the warning information includes information indicating a warning level set for the error, The display device according to claim 1 , wherein the control unit causes a warning mark image indicating the warning level set for the error to be displayed on the second screen.

12. A display device according to any one of claims 1 to 11, a transmitter for transmitting the alarm information to the display device; A work machine comprising:

Images