Method for controlling a display device of a work machine

Abstract

To intuitively and easily recognize an operation method of resetting use information of consumables of a work machine.SOLUTION: A control method of a display device 10 of a work machine 1 includes: notifying a user of arrival of a maintenance timing of consumables of a work machine 1 requiring maintenance; displaying the consumables requiring the maintenance as a function setting item on a display 13 of the display device 10; receiving selection of the function setting item of resetting integral time used for the consumables stored in the work machine 1; and displaying a reset setting screen 60a capable of setting whether or not to reset the integral time on the display 13.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a method for controlling a display device provided on a work machine such as a construction machine. [Background technology]

[0002] Conventionally, work machines such as construction machines are equipped with a display device that displays various information. In addition, the work machines are equipped with consumables that require maintenance depending on usage. The work machines can detect the arrival of the maintenance time for the consumables by monitoring the accumulated time for which the consumables have been used, and can notify the operator of the arrival of the maintenance time for the consumables via the display device.

[0003] For example, the display device of a work machine disclosed in Patent Document 1 displays a maintenance mark on the display screen of the display device when the time for maintenance arrives for any of a plurality of parts that require periodic maintenance. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2002-327467 A Summary of the Invention [Problem to be solved by the invention]

[0005] In conventional work machines, when maintenance is performed on a consumable, the accumulated time of use of that consumable must be measured from the beginning, and so the stored accumulated time must be reset. However, since work machines have multiple functions and multiple setting means for setting each function, there is a problem that it is difficult to intuitively understand how to operate the setting means for resetting usage information such as the accumulated time of use of the consumable.

[0006] An object of the present invention is to provide a control method for a display device of a work machine that can make the operation method for resetting usage information of consumables of the work machine intuitive and easy to understand. [Means for solving the problem]

[0007] In order to solve the above problems, the control method for a display device of a work machine of the present invention includes: notifying the user of the arrival of a maintenance time for a consumable of the work machine that requires maintenance; displaying the consumable requiring maintenance as a function setting item on a display unit of the display device; and, upon receiving a selection of the function setting item that resets the accumulated time used for the consumable stored in the work machine, causing the display unit to display a reset setting screen on which it is possible to set whether or not to reset the accumulated time.

[0008] In the control method of the present invention, the reset setting screen is displayed so as to be superimposed on the function setting items.

[0009] In the control method of the present invention described above, the reset setting screen is displayed together with a selection item for selecting whether or not to reset the integrated time.

[0010] In the above control method of the present invention, the selection items are displayed below the function setting items.

[0011] The above-mentioned control method of the present invention includes displaying on the display unit a visually perceptible display that notifies the user of the arrival of the maintenance time and, after displaying the function setting items, displays the steps leading to the display of the reset setting screen.

[0012] The control method of the present invention described above includes: displaying, on the display unit, a selection means for selecting one of a plurality of function setting means for setting each of a plurality of functions of the work machine; The visual perception indication changes a display state of the selection means. Effect of the Invention

[0013] According to the present invention, there is provided a control method for a display device of a work machine that can make the operation method for resetting usage information of consumables of the work machine intuitive and easy to understand. [Brief description of the drawings]

[0014] [Figure 1] 1 is a block diagram of a work machine according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a plan view showing an example of a home screen on a display device of a work machine according to an embodiment of the present invention. [Diagram 3] 4 is a plan view showing an example of a first selection screen on the display device of the work machine according to the embodiment of the present invention. FIG. [Figure 4] 10 is a plan view showing an example of a second selection screen on the display device of the work machine according to the embodiment of the present invention. FIG. [Diagram 5] FIG. 13 is a plan view showing an example of a third selection screen on the display device of the work machine according to the embodiment of the present invention. [Figure 6] FIG. 4 is a plan view showing an example of a reset setting screen which is a function setting screen on the display device of the work machine according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] A work machine 1 and a display device 10 according to an embodiment of the present invention will be described with reference to the drawings. Fig. 1 is a block diagram showing a work machine 1 equipped with a display device 10 of this embodiment.

[0016] The work machine 1 is, for example, a construction machine (e.g., a hydraulic excavator) used at construction sites, demolition sites, mines, etc., and performs civil engineering work, building construction work, etc. in response to operation by an operator. The work machine 1 includes, for example, an engine 2, an engine control unit 3, a hydraulic mechanism 4, and a display device 10.

[0017] The engine 2 transmits power to each part of the work machine 1. The engine 2 uses engine oil 2a for lubrication to ensure that each part of the engine 2 operates smoothly. The engine 2 is also provided with an engine oil filter 2b that removes impurities from the engine oil 2a. The engine oil 2a and the engine oil filter 2b are consumable items whose life span shortens depending on the usage (accumulated time of use) of the work machine 1 (engine 2), and are maintained by being replaced.

[0018] The engine control unit 3 controls the operation of the engine 2, and is constituted by an engine ECU etc. The engine control unit 3 also measures the number of revolutions of the engine 2 and outputs it to the display device 10.

[0019] The hydraulic mechanism 4 performs work such as civil engineering and construction work, and has hydraulic members (not shown) such as a boom, arm, and bucket, and a hydraulic actuator (not shown) that drives the hydraulic members. The hydraulic mechanism 4 has a hydraulic pump (not shown) that pressurizes hydraulic oil 4a with power generated by the engine 2, and drives the hydraulic actuator using the pressurized hydraulic oil 4a as a power transmission medium.

[0020] The hydraulic mechanism 4 is configured to return the hydraulic oil 4a from the hydraulic actuator to a hydraulic tank (not shown) via a return flow path (not shown), and the return flow path is provided with a hydraulic oil return filter 4b that removes impurities from the hydraulic oil 4a. The hydraulic mechanism 4 is configured to supply the hydraulic oil 4a from the hydraulic tank to the hydraulic pump via a supply flow path (not shown), and the supply flow path is provided with a hydraulic oil supply filter 4c that removes impurities from the hydraulic oil 4a. The hydraulic oil 4a, the hydraulic oil return filter 4b, and the hydraulic oil supply filter 4c are consumables whose life spans become shorter depending on the use (accumulated time of use) of the work machine 1 (hydraulic mechanism 4), and are maintained by being replaced.

[0021] The hydraulic mechanism 4 detects the drive of each part of the hydraulic mechanism 4, for example, the drive of the hydraulic actuator and the drive of the return flow path and the supply flow path, and outputs, for example, an on or off drive signal to the display device 10 as the detection result.

[0022] The display device 10 displays various information about the work machine 1. The display device 10 includes, for example, a display control unit 11, a storage unit 12, a display unit 13, and an operation unit 14.

[0023] The display control unit 11 is composed of a monitor ECU etc., and controls the operation of each part of the display device 10. The memory unit 12 is a storage means composed of a storage medium such as ROM or RAM, and stores various information of the display device 10. The memory unit 12 stores, for example, the lifespan (lifetime usage) of various consumables of the work machine 1 in advance. The memory unit 12 also sequentially stores usage information such as the accumulated time that each consumable of the work machine 1 has been used.

[0024] The display unit 13 is composed of, for example, a liquid crystal monitor, and displays a screen according to the control by the display control unit 11. The operation unit 14 is composed of, for example, a plurality of function keys, and accepts operations corresponding to the screen displayed by the display control unit 11.

[0025] The display control unit 11 controls the display unit 13 to display various screens on the display unit 13. The display control unit 11 switches between various screens displayed on the display unit 13 in response to operation of the operation unit 14. The display control unit 11 also displays a menu bar 13a having multiple selection items and an alarm display field 13b that notifies of an abnormality that has occurred in the work machine 1 on various screens of the display unit 13. The operation unit 14 has multiple function keys provided corresponding to the multiple selection items on the menu bar 13a, respectively, and the display control unit 11 accepts selection of each selection item in response to operation of each function key.

[0026] For example, when the work machine 1 (engine 2) is operated, the display control unit 11 causes the display unit 13 to display the home screen 20 as a basic screen (see FIG. 2). The display control unit 11 also causes the display unit 13 to display a function setting screen 60 having a plurality of function setting means for setting a plurality of functions of the work machine 1 (see FIG. 6). For example, the display control unit 11 causes the display unit 13 to display a reset setting screen 60a as the function setting screen 60 having a reset setting means for resetting usage information such as the accumulated time of each consumable of the work machine 1 as the function setting means. The home screen 20 has a selection means for selecting one of the plurality of function setting means. Furthermore, the display control unit 11 causes the display unit 13 to display selection screens 30, 40, 50 having selection means for selecting one of the plurality of function setting means between the home screen 20 and the function setting screen 60 (see FIGS. 3, 4, and 5). In other words, the display control unit 11 and the display unit 13 function as function setting means and selection means.

[0027] The display control unit 11 also manages the multiple functions of the work machine 1 in a tree-like hierarchical structure. For example, the display control unit 11 classifies the multiple functions of the work machine 1 into first layer groups for each rough type (hereinafter referred to as the first layer type). The display control unit 11 also classifies each first layer group into a second layer group for each type (hereinafter referred to as the second layer type) that is more detailed than the first layer type. Furthermore, the display control unit 11 classifies each second layer group into a third layer group for each type (hereinafter referred to as the third layer type) that is more detailed than the second layer type. Then, the display control unit 11 classifies each third layer group into each type (hereinafter referred to as the function type) that is more detailed than the third layer type, thereby classifying the above multiple functions. The display control unit 11 accepts selection of the first layer group, the second layer group, and the third layer group by the selection means of the home screen 20, the selection screens 30, 40, 50, and the function setting screen 60. In other words, the display control unit 11 configures a selection means by hierarchically organizing the procedures leading to the function setting means.

[0028] The display control unit 11 displays a fuel gauge 21, a hydraulic oil temperature gauge 22, a radiator water temperature gauge 23, a work status display (not shown), various warning lamps (not shown), etc. on the home screen 20. Furthermore, the display control unit 11 displays each of the above-mentioned first layer groups in a selectable manner on the menu bar 13a on the home screen 20 as a selection means for reaching any one of a plurality of function setting means.

[0029] For example, the display control unit 11 classifies a plurality of functions of the work machine 1 into first layer groups of "Various Settings," "Crane," "Mode," "Camera," and "PTO," and displays the names of the first layer groups, which are options, in the respective selection items of the menu bar 13a. In this way, the display control unit 11 accepts the selection of a first layer group in response to the operation of the operation unit 14. Note that the selection of the first layer group "Various Settings" displayed in the menu bar 13a of the home screen 20 is a selection means leading to a reset setting means.

[0030] When a first tier group is selected on the menu bar 13a of the home screen 20, the display control unit 11 causes the display unit 13 to display a first selection screen 30 related to the selected first tier group. At this time, the display control unit 11 displays, on the first selection screen 30, each second tier group classified from the first tier group in a selectable manner as a selection means for reaching any one of a plurality of function setting means.

[0031] For example, the display control unit 11 classifies the first layer group of "various settings" into second layer groups of "monitor settings", "body settings", "PTO settings", "monitoring settings", "operation management", "maintenance", "error history", and "filter regeneration", and displays the names of the second layer groups, which are options, on the first selection screen 30 as shown in FIG. 3. The display control unit 11 may also display an identification notation such as an icon for identifying each second layer group on the first selection screen 30. Note that the menu bar 13a of the first selection screen 30 displays an option for returning to the home screen 20 and an option for moving a cursor to select and confirm one of the second layer groups. The cursor indicating the selection candidate of the second layer group is displayed differently from the other options, and is shown by hatching in FIG. 3. As a result, the display control unit 11 accepts the selection of the second layer group in response to the operation of the operation unit 14. Note that the selection of the second layer group "maintenance" displayed on the first selection screen 30 is a selection means leading to a reset setting means.

[0032] When a second layer group is selected on the first selection screen 30, the display control unit 11 causes the display unit 13 to display a second selection screen 40 related to the selected second layer group. At this time, the display control unit 11 displays, on the second selection screen 40, each third layer group classified from the second layer group in a selectable manner as a selection means leading to any one of a plurality of function setting means.

[0033] For example, the display control unit 11 classifies the second layer group of "maintenance" into each of the third layer groups of "cumulative usage time" and "maintenance history", and displays the names of each of the third layer groups as options on the second selection screen 40 as shown in FIG. 4. The display control unit 11 may also display an identification notation such as an icon for identifying each of the third layer groups on the second selection screen 40. Note that the menu bar 13a of the second selection screen 40 displays an option to return to the first selection screen 30 and an option to move the cursor to select and confirm one of the third layer groups. The cursor indicating the selection candidate of the third layer group is displayed differently from the other options, and is shown by hatching in FIG. 4. In this way, the display control unit 11 accepts the selection of the third layer group in response to the operation of the operation unit 14. Note that the selection of the third layer group "cumulative usage time" displayed on the second selection screen 40 is a selection means leading to a reset setting means.

[0034] When a third tier group is selected on the second selection screen 40, the display control unit 11 causes the display unit 13 to display a third selection screen 50 relating to the selected third tier group. At this time, the display control unit 11 displays, on the third selection screen 50, selectable items for setting each function classified from the third tier group (hereinafter referred to as function setting items) as selection means for reaching any one of a plurality of function setting means.

[0035] For example, the display control unit 11 classifies the third layer group of "cumulative usage time" into each function setting item of "hydraulic oil", "hydraulic oil return filter", "hydraulic oil supply filter", "engine oil", and "engine oil filter", and displays the name of each function setting item as an option on the third selection screen 50 as shown in FIG. 5. Here, each function setting item of "hydraulic oil", "hydraulic oil return filter", "hydraulic oil supply filter", "engine oil", and "engine oil filter" is a function item for resetting the cumulative time used for each consumable of the work machine 1. On the third selection screen 50 of the third layer group "cumulative usage time", the life usage time and cumulative time of each consumable of the work machine 1, "hydraulic oil", "hydraulic oil return filter", "hydraulic oil supply filter", "engine oil", and "engine oil filter", are written side by side. In addition, the display control unit 11 may display an identification notation such as an icon for identifying each consumable on the third selection screen 50. Note that the menu bar 13a of the third selection screen 50 displays a selection item for returning to the second selection screen 40 and a selection item for moving a cursor to select and confirm one of the function setting items. The cursor indicating the function setting item selection candidate is displayed differently from other options, and is shown by hatching in Fig. 5. In this way, the display control unit 11 accepts the selection of the function setting item in response to the operation of the operation unit 14. Note that the selection of each function setting item displayed on the third selection screen 50 is a selection means leading to a reset setting means. In other words, the reset means is provided for each type of consumable at the lowest layer of the selection means.

[0036] When a function setting item is selected on the third selection screen 50, the display control unit 11 causes the display unit 13 to display a function setting screen 60 having a function setting means for setting the function of the selected function setting item. For example, when any function setting item is selected on the third selection screen 50 of the third hierarchical group "accumulated use time", the display control unit 11 causes the display unit 13 to display a reset setting screen 60a on which it is possible to set whether or not to reset the accumulated time of use of the consumable corresponding to the selected function setting item, as shown in FIG. 6. Note that the menu bar 13a of the reset setting screen 60a displays a selection item for selecting whether or not to reset the accumulated time. When resetting the accumulated time is selected on the reset setting screen 60a, the display control unit 11 resets the accumulated time stored in the memory unit 12 for the corresponding consumable, i.e., sets it to 0.

[0037] Furthermore, as described above, the display control unit 11 acquires usage information such as the accumulated time used for the consumables of the engine 2 (e.g., the engine oil 2a and the engine oil filter 2b) and the accumulated time used for the consumables of the hydraulic mechanism 4 (e.g., the hydraulic oil 4a, the hydraulic oil return filter 4b, and the hydraulic oil supply filter 4c), and sequentially stores the information in the memory unit 12. The display control unit 11 updates the accumulated time of the consumables stored in the memory unit 12 according to the usage of the engine 2 and the hydraulic mechanism 4.

[0038] For example, the display control unit 11 receives data on the number of revolutions of the engine 2 from the engine control unit 3, starts measuring the operation time of the engine 2 when the number of revolutions exceeds a predetermined threshold number of revolutions, and ends measuring the operation time of the engine 2 when the number of revolutions falls below the threshold number of revolutions. The display control unit 11 adds the measured operation time of the engine 2 to the accumulated use time of consumables of the engine 2 (e.g., engine oil 2a, engine oil filter 2b), and stores the result in the memory unit 12.

[0039] The display control unit 11 also receives a drive signal from the hydraulic mechanism 4, and measures the operating time of the hydraulic mechanism 4 while the drive signal is on. The display control unit 11 adds the measured operating time of the hydraulic mechanism 4 to the accumulated usage time of consumables of the hydraulic mechanism 4 (for example, the hydraulic oil 4a, the hydraulic oil return filter 4b, and the hydraulic oil supply filter 4c), and stores the result in the memory unit 12.

[0040] Further, the display control unit 11 detects the arrival of the time for maintenance of the consumables when the accumulated time reaches the life usage time based on the accumulated time of use of the consumables of the engine 2 and the hydraulic mechanism 4, or when the difference between the accumulated time and the life usage time becomes equal to or less than a predetermined life threshold. When the display control unit 11 detects the arrival of the time for maintenance of the consumables, the display control unit 11 functions as a notification means for notifying the arrival of the maintenance time. For example, the display control unit 11 as the notification means notifies the arrival of the maintenance time by displaying a maintenance notation such as the text "Maintenance" or an image encouraging other maintenance in the warning notation field 13b displayed on the display unit 13. Note that the display control unit 11 may display an identification notation such as the name or icon of the consumables whose maintenance time has arrived in the warning notation field 13b.

[0041] Incidentally, when the display device 10 notifies the worker of the arrival of the maintenance time of the consumables on the home screen 20 as described above, a worker who sees the notification will stop the engine 2 and perform maintenance such as replacing the consumables of the work machine 1. Thereafter, when the worker restarts the engine 2 and the display device 10 displays the home screen 20, if the accumulated time stored in the storage unit 12 has not been reset, the display control unit 11 detects the arrival of the maintenance time of the consumables based on the relationship between the accumulated time and the life usage time, and notifies the worker of the arrival of the maintenance time of the consumables on the home screen 20. Therefore, in order to prompt the worker to reset the accumulated time, when notifying the worker of the arrival of the maintenance time, the display device 10 performs a visual recognition display that allows the worker to visually recognize the procedure leading to the reset setting means for the consumables whose maintenance time has arrived, by using the selection means on the home screen 20, the first selection screen 30, the second selection screen 40, and the third selection screen 50 described above.

[0042] At this time, the display control unit 11 displays, as a visual recognition display, the notation related to the selection means leading to the reset setting means on the home screen 20, the first selection screen 30, the second selection screen 40, and the third selection screen 50 in a different color from other notations. For example, the display control unit 11 displays the names and identification notations of the selection items of the first layer group "Various Settings" displayed on the menu bar 13a of the home screen 20 in a color different from other selection items. In addition, the display control unit 11 displays the names and identification notations of the selection items of the second layer group "Maintenance" displayed on the first selection screen 30 in a color different from other selection items, and displays the names and identification notations of the selection items of the third layer group "Accumulated Use Time" displayed on the second selection screen 40 in a color different from other selection items. Furthermore, the display control unit 11 displays the names and identification notations of the function setting items corresponding to the consumables for which the arrival of the maintenance time has been detected, among the function setting items displayed on the third selection screen 50, in a color different from other function setting items.

[0043] When the accumulated times of all consumables for which the arrival of the maintenance time has been detected is reset by the reset setting means of the reset setting screen 60a described above, the display control unit 11 cancels the notification of the arrival of the maintenance time and cancels the maintenance notation in the warning notation field 13b. The display control unit 11 also cancels the visual recognition display by the selection means on the home screen 20, the first selection screen 30, the second selection screen 40, and the third selection screen 50. Note that, if the arrival of the maintenance time has been detected for two or more consumables, the display control unit 11 may cancel the visual recognition display on the third selection screen 50 for each consumable for which the accumulated time has been reset.

[0044] As described above, according to this embodiment, the display device 10 of the work machine 1 is provided with a memory unit 12 (storage means) that stores the accumulated time used for consumables of the work machine 1 that require maintenance depending on usage. The display control unit 11 and display unit 13 provided in the display device 10 also function as notification means that notifies the arrival of the time for maintenance of the consumables based on the accumulated time. Furthermore, the display control unit 11 and display unit 13 function as a plurality of function setting means for respectively setting a plurality of functions of the work machine 1, and a selection means for selecting one of the plurality of function setting means. The plurality of function setting means have a reset setting means that resets the accumulated time. The selection means performs a visual recognition display that allows the user to visually recognize the procedure leading to the reset setting means for the consumables that are due for maintenance.

[0045] In this way, the display device 10 allows a worker performing maintenance on a consumable item that is due for maintenance to visually recognize the procedure for resetting the accumulated time for which the consumable item has been used. This makes it possible to make the worker aware that the accumulated time for the consumable item needs to be reset, and further makes it possible for the worker to intuitively understand the operation method for resetting the accumulated time. Furthermore, by resetting the accumulated time after maintenance on the consumable item, the accumulated time for the consumable item after maintenance can be measured more accurately, and therefore more appropriate use of the consumable item allows the working machine 1 to be used more appropriately.

[0046] In addition, the selection means of the display device 10 is configured with a hierarchical structure of steps leading to the reset setting means. This allows the display device 10 to reach the reset setting means by stepwise selection in a hierarchical structure for selecting a plurality of function setting means. This allows the operator to select the reset setting means from a large number of function setting means without hesitation, and makes it possible for the operator to intuitively understand the operation method for resetting the accumulated time of the consumables.

[0047] Furthermore, the selection means of the display device 10 is configured to provide a visually cognizable display for each layer. As a result, in the hierarchical structure for selecting one of a plurality of function setting means, the display device 10 provides a visually cognizable display continuously for each layer up to the reset setting means, so that the method of resetting the accumulated time of the consumables can be intuitively and easily understood by the operator.

[0048] Furthermore, the reset setting means of the display device 10 is provided for each type of consumable at the lowest level of the selection means. This allows the worker to intuitively and easily identify, from among the multiple consumables of the work machine 1, the consumables that are due for maintenance and require the resetting of the accumulated time.

[0049] Furthermore, the selection means of the display device 10 includes an identification marking for identifying the options, and is configured to display the identification marking of the option leading to the reset setting means in a color different from other options as a visual recognition display. As a result, the display device 10 displays the options of the selection means leading to the reset setting means in a way that distinguishes them from other options and performs a visual recognition display, making it possible for the operator to intuitively and easily understand the operating method for resetting the accumulated time of the consumables.

[0050] In addition, the selection means of the display device 10 is configured to cancel the visual recognition display after the reset of the integrated time by the reset setting means. This allows the display device 10 to make it easy for the worker to intuitively understand that the integrated time for the consumable item for which maintenance has been performed has been reset.

[0051] Furthermore, according to this embodiment, the control method of the display device 10 of the work machine 1 includes notifying the arrival of the time for maintenance of consumables of the work machine 1 that require maintenance, displaying the consumables that require maintenance as function setting items on the display unit 13 of the display device 10, and, when a selection of a function setting item for resetting the accumulated time used for the consumables stored in the work machine 1 is accepted, displaying on the display unit 13 a reset setting screen 60a that allows the user to set whether or not to reset the accumulated time.

[0052] In this control method, as shown in Fig. 6, a reset setting screen 60a is displayed overlapping with the function setting items. The reset setting screen 60a is also displayed together with a selection item for selecting whether or not to reset the accumulated time. This selection item is also displayed below the function setting items.

[0053] This control method notifies the user that the time for maintenance is approaching and causes the display unit 13 to display a visual recognition display that displays the procedure leading to the display of the reset setting screen 60a after displaying the function setting items. This control method also has the steps of causing the display unit 13 to display a selection means for selecting one of a plurality of function setting means for setting each of a plurality of functions of the work machine 1, and causing the visual recognition display to change the display state of the selection means (for example, displaying a notation related to the selection means differently from other notations).

[0054] In the above embodiment, an example has been described in which the display control unit 11 measures the operation time of the engine 2 based on the rotation speed of the engine 2, but the present invention is not limited to this example. For example, in other embodiments, the display control unit 11 may measure the operation time of the engine 2 based on the amount of fuel consumed or other information.

[0055] In the above embodiment, an example has been described in which the display control unit 11 measures the operating time of the hydraulic mechanism 4 based on the detection results of the drive of each part of the hydraulic mechanism 4, but the present invention is not limited to this example. For example, in other embodiments, the display control unit 11 may measure the operating time of the hydraulic mechanism 4 based on the hydraulic pressure of the hydraulic oil in the hydraulic actuator, the flow rate of the hydraulic oil in the return flow path and the supply flow path, or other information.

[0056] In the above embodiment, an example has been described in which the display control unit 11 measures the cumulative usage time of the hydraulic oil 4a, the hydraulic oil return filter 4b, and the hydraulic oil supply filter 4c based on the operating time of the hydraulic mechanism 4, but the present invention is not limited to this example. For example, in another embodiment, the display control unit 11 may measure the cumulative usage time of each consumable from an element related to each consumable, such as measuring the cumulative usage time of the hydraulic oil 4a based on the drive of the hydraulic actuator and the hydraulic pressure of the hydraulic oil, measuring the cumulative usage time of the hydraulic oil return filter 4b based on the drive of the return flow path and the flow rate of the hydraulic oil, and measuring the cumulative usage time of the hydraulic oil supply filter 4c based on the drive of the supply flow path and the flow rate of the hydraulic oil.

[0057] In the above embodiment, an example has been described in which the display device 10 classifies the multiple functions (function setting means) of the work machine 1 into a first tier group hierarchy, a second tier group hierarchy, and a third tier group hierarchy, but the present invention is not limited to this example. For example, in other embodiments, the display device 10 may classify the multiple functions of the work machine 1 into two tiers or less, or into four tiers or more. Furthermore, the display device 10 may classify the multiple functions of the work machine 1 into a different number of tiers depending on the type of function.

[0058] In the above embodiment, the display device 10 displays the notation related to the selection means leading to the reset setting means in a color different from other notations as a visual recognition display. However, the present invention is not limited to this example. For example, in another embodiment, the display device 10 may display the background of the notation related to the selection means leading to the reset setting means in a color different from other notations as a visual recognition display. Also, in another embodiment, the display device 10 may display the notation related to the selection means leading to the reset setting means in a different color from other notations as a visual recognition display by adding characters related to resetting the accumulated time to the name of the notation. Alternatively, in another embodiment, the display device 10 may display the notation related to the selection means leading to the reset setting means in a different color from other notations as a visual recognition display by blinking it.

[0059] In the above embodiment, an example has been described in which the display device 10 displays the reset setting screen 60a from the home screen 20 via the first selection screen 30, the second selection screen 40, and the third selection screen 50, but the present invention is not limited to this example. For example, in another embodiment, the display device 10 may display on the home screen 20 an operation key for displaying the reset setting screen 60a with a single operation when notifying the arrival of the maintenance time on the home screen 20.

[0060] In the above embodiment, the operation unit 14 of the display device 10 is configured with a plurality of function keys, but the present invention is not limited to this example. For example, in another embodiment, the operation unit 14 may be configured with a touch panel together with the display unit 13, and in that case, selection is made in response to a touch operation of an item (e.g., a selection item in the menu bar 13a) displayed corresponding to the operation function. Alternatively, in another embodiment, the operation unit 14 may be configured with a jog dial, and in that case, selection candidates of an item (e.g., a selection item in the menu bar 13a) displayed corresponding to the operation function are changed in response to the rotation of the dial, and the selection of the selection candidate is decided in response to the operation of the decision button of the dial. It is preferable that the selection candidates are highlighted differently from other items.

[0061] In the above embodiment, an example has been described in which the display device 10 monitors the accumulated time of use as usage information of the consumables of the work machine 1 and resets in response to maintenance, but the present invention is not limited to this example. For example, in other embodiments, the display device 10 may monitor other information, such as the amount of consumables used, as usage information of the consumables of the work machine 1, and reset in response to maintenance.

[0062] Furthermore, the present invention can be modified as appropriate within the scope that does not contradict the gist or concept of the invention that can be read from the claims and the entire specification, and a control method for a display device of a work machine that involves such modifications is also included in the technical concept of the present invention. [Explanation of symbols]

[0063] [Appendix to the invention] The following will provide an overview of the invention extracted from the above-described embodiment. Note that the configurations and processing functions described in the following supplementary notes can be selected and combined as desired.

[0064] <Appendix 1> A method for controlling a display device of a work machine, comprising the steps of: Notifying the user of the arrival of a maintenance time for a consumable item of the work machine that requires maintenance; displaying the consumables requiring maintenance as function setting items on a display unit of the display device; when a selection of the function setting item for resetting an accumulated time used for the consumable stored in the work machine is accepted, displaying a reset setting screen on the display unit on which it is possible to set whether or not to reset the accumulated time; A method for controlling a display device of a work machine having the above-mentioned configuration.

[0065] <Appendix 2> The control method according to claim 1, wherein the reset setting screen is displayed superimposed on the function setting item.

[0066] <Appendix 3> The control method according to claim 1 or 2, wherein the reset setting screen is displayed together with a selection item for selecting whether or not to reset the integrated time.

[0067] <Appendix 4> The control method according to claim 3, wherein the selection items are displayed below the function setting items.

[0068] <Appendix 5> The control method according to any one of claims 1 to 4, further comprising displaying on the display unit a visually perceptible display that displays the procedure leading to displaying the reset setting screen after displaying the function setting items, together with notifying the user of the arrival of the maintenance time.

[0069] <Appendix 6> displaying on the display unit a selection means for selecting one of a plurality of function setting means for setting each of a plurality of functions of the work machine; The control method according to claim 5, further comprising: changing a display state of the selection means by the visual perception display.

[0070] 1. Work Machinery 2 Engine 4 Hydraulic mechanism 10 Display device 11 Display control unit 12 Storage section 13 Display section 14 Control section 2a engine oil 2b Engine oil filter 4a Hydraulic oil 4b Hydraulic oil return filter 4c Hydraulic Oil Supply Filter

Claims

1. A method for controlling a display device of a work machine, comprising the steps of: Notifying the user of the arrival of a maintenance time for a consumable item of the work machine that requires maintenance; displaying the consumables requiring maintenance as function setting items on a display unit of the display device; when a selection of the function setting item for resetting an accumulated time used for the consumable stored in the work machine is accepted, a reset setting screen on the display unit, which allows a user to set whether or not to reset the accumulated time, is displayed superimposed on the function setting item; having A method for controlling a display device of a work machine, wherein the function setting items include the consumables whose maintenance period has not yet arrived.

2. A control method as described in claim 1, wherein the function setting items of the consumables for which maintenance has arrived are displayed in a color different from the function setting items of the consumables for which maintenance has not arrived.

3. 3. The control method according to claim 1, wherein the reset setting screen is displayed together with a selection item for selecting whether or not to reset the integrated time.

4. The control method according to claim 3 , wherein the selection items are displayed below the function setting items.

5. The control method according to claim 1, further comprising displaying on the display unit a visually perceptible display that displays the procedure leading to displaying the reset setting screen after displaying the function setting items, together with notifying the user of the arrival of the maintenance time.

6. displaying on the display unit a selection means for selecting one of a plurality of function setting means for setting each of a plurality of functions of the work machine; The control method according to claim 5 , further comprising: changing a display state of the selection means to visually perceive the indication.

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