JP2002332665A - Display for working machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display for a working machine, which can display both state indicating marks and state change indicating marks on a single display screen in a limited area without reducing the size of each mark even if the number of the indicating marks is increased, does not cause shrinkage of the display and degradation of visibility of the indicating marks, and does not hinder operation of the working machine such as a construction machine. SOLUTION: When the display screen 2 displays a first view, upon input of a specific signal (e.g. an abnormality signal) into a controller 19, caution marks 33, 34 are displayed on a display section 30, and a mark 31 displayed on the display section 30 is non-displayed. On the other hand, when the display screen 2 is changed from the first view to a second view, upon input of a specific signal (e.g. an abnormality signal) into the controller 19, maintenance marks 41 to 50, a return mark 51, and a selection number 52 displayed on the second view maintain their display states as they are. Further, the caution marks 33, 34 are in the non-display state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device provided in a driver's cab or the like of a work machine for displaying the state and changes of the work machine, and more particularly to a display device in which a display screen transitions to a first screen and a second screen. .

[0002]

2. Description of the Related Art In a cab of a construction machine, there is provided a display device for displaying a state of the construction machine such as a cooling water temperature and an abnormality such as a decrease in engine oil pressure. A conventional display device will be described with reference to FIG.

[0003] On a display screen 81 of a display device 80, a state display mark 82 (bar graph) for displaying the state of the construction machine and a state change display mark 83 for displaying a change occurring in the work machine are displayed. . For example, as a bar graph, a state display mark 82 indicating the temperature of the engine coolant and the remaining amount of fuel, a battery voltage, an engine oil pressure, a hydraulic oil temperature,
A caution mark 83 indicating that the cooling water temperature or the like has become an abnormal value is displayed separately on the same display screen 81.

An operator operates a display screen 81 of a display device 80.
The current fuel remaining value and the temperature of the cooling water can be recognized from the display contents of the status display mark 82 displayed in the area (a).
Further, from the lighting state of the caution mark 83, it is possible to recognize the type of abnormality that is currently occurring.

In recent years, construction machines have become multifunctional, and accordingly, the number of status display marks 82 and caution marks 83 to be displayed on the same display screen 81 of the display device 80 has increased.

[0006] In the conventional display device 80, the status display mark 82 and the caution mark 83 are displayed at independent display locations on the display screen 81.

For this reason, when the number of the status display marks 82 and the caution marks 83 increases, the size of each of the status display marks 82 and the caution marks 83 must be increased in order to display them all within the limited area of the display screen 81. Must be reduced. When the size of each mark of the state display mark 82 and the caution mark 83 is reduced, there is a problem that the visibility of each mark is reduced.

Conversely, if the size of each of the status display mark 82 and the caution mark 83 is to be kept the same as in the prior art to cope with the increase in the number of marks, the area of the display screen 81 must be made larger than in the prior art. This leads to an increase in the size of the display device 80.

However, since the space in the cab of a construction machine is generally limited, it is not preferable to increase the size of the display device 80.

As described above, the conventional display device 80 has a problem that the visibility of the mark is inevitably reduced in order to cope with the increase in the number of marks without increasing the size.

On the other hand, Japanese Patent Application Laid-Open No. 9-78636 discloses a state display of information necessary for operating a construction machine, such as a remaining fuel amount, a cooling water temperature and an engine oil pressure, when no abnormality occurs in the construction machine. The invention describes that a mark is displayed on a display screen as a mark, and when an abnormality occurs in the construction machine, the currently displayed state display mark is set to a non-display state and only the caution mark is displayed on the display screen.

As described above, only one of the state display mark and the caution mark is selectively displayed on the display screen, and the state display mark 8 is displayed as in the display device 80 of FIG.
It is not necessary to display both 2 and the caution mark 83 on the same screen. Therefore, even if the number of marks increases, the marks can be arranged within a limited display area without reducing the size of each mark, and a decrease in visibility can be prevented.

[0013]

SUMMARY OF THE INVENTION However, Japanese Patent Application Laid-Open No. 9-78 / 1994
According to the invention described in Japanese Patent Application Publication No. 636, when an abnormality occurs in the construction machine, the state display mark is set to the non-display state. Therefore, there is a problem that the operation of the construction machine becomes difficult for the following reasons.

By looking at the status display mark, the operator can quickly grasp the abnormality that may occur in the construction machine.

According to the invention of the above publication, when an abnormality occurs in the construction machine, the state display mark is set to the non-display state and only the caution mark is displayed on the display screen. Alternatively, it is also possible to alternately repeat a state in which only the caution mark is displayed without displaying the state display mark on the display screen and a state in which only the state display mark is displayed without displaying the caution mark.

However, in any case, a state occurs in which the operator cannot see the state display mark. Therefore, if the state display mark is set to the non-display state, it will not be possible to quickly grasp abnormalities that may occur in the remaining fuel amount, cooling water temperature, engine oil pressure, and the like. Further, even if an abnormality such as the remaining fuel amount, the cooling water temperature, or the engine oil pressure occurs while the caution mark is displayed, the abnormality cannot be grasped.

The caution mark includes a caution mark which indicates a serious abnormality that requires a prompt action by stopping the driving operation when the caution mark is illuminated, and a quick action even if the caution mark is illuminated. There is a caution mark that indicates a minor abnormality that is not required. For example, an increase in hydraulic oil temperature is a slight abnormality.

Even when a caution mark indicating a slight abnormality is lit on the display screen, the operator often continues the operation of the construction machine to continue the operation of the traveling device and the working device of the construction machine.

According to the invention described in the above publication, when a slight abnormality occurs in the construction machine, the display screen is switched from the state display mark display to the caution mark display in the same manner as when a severe abnormality occurs. Therefore, the operator is forced to continue the driving operation in a state where only the caution mark is displayed on the display screen and the state display mark is not displayed. In the state display mark, the traveling state of the traveling device,
There is a device that displays information important for a driving operation that displays a working state of a working device. For example, a status display mark that indicates the speed setting (high speed (Hi), medium speed (Mi), low speed (Lo)) of the hydraulic motor, and the currently selected work mode (heavy digging, digging, straightening, fine operation) Corresponds to the status display mark.

In a state where the state display mark for displaying the speed setting of the hydraulic motor is not displayed, the operator must operate the traveling operation lever while guessing the speed setting. For example, if the operator incorrectly estimates that the speed setting of the hydraulic motor is "high speed" but the speed is actually "high speed" and operates the traveling operation lever greatly, the crawler track is contrary to the operator's intention. May rotate at high speed.

In the state where the status display mark for displaying the work mode is not displayed, the operator must operate the work equipment operation lever while guessing the currently selected work mode. For example, the currently selected work mode is actually “heavy excavation”, and the operator erroneously estimates that the operation mode is “fine operation” despite the fact that a large flow rate can be supplied to the hydraulic cylinder for work equipment. When the operation lever for the machine is largely operated, the work machine (boom, arm, bucket) may be largely operated at high speed against the intention of the operator.

Further, according to the invention of the above publication, even if an abnormality occurs in the construction machine when the operator performs a switch operation or the like to change the display screen from the first screen to the second screen, Display only the caution mark on the display screen. For example, when the second screen displays selection items to be selected by the operator, the operator cannot see these selection items,
Selection becomes impossible. As described above, although the operator changes the display screen to the specific screen by his / her own will, the display content of the specific screen cannot be viewed.

The present invention has been made in view of such circumstances, and even if the number of status display marks and status change display marks increases, the same display screen with a limited area without reducing the size of each mark. It is necessary to make it possible to display both of them on the top, so as not to increase the size of the display device and to reduce the visibility of the display mark, and not to hinder the operation of working machines such as construction machines. It is to be solved.

[0024]

Means for Solving the Problems, Functions and Effects According to the first invention, the display screen transitions to a first screen and a second screen, and when a specific signal is input, the first screen is displayed. In a display device of a work machine that displays a specific mark at a position where a predetermined mark is displayed among a plurality of displayed marks, when the display screen is transitioned to a second screen, the specific signal is displayed. When input, the display content of the second screen is maintained.

FIGS. 1 (a), 1 (b), 2
This will be described with reference to (a) and (b).

When the display screen 2 is the first screen (normal screen) and no abnormality has occurred in the hydraulic shovel, as shown in FIG.
Marks 21, 31, 41, 51, 61, and 71 respectively associated with 30, 40, 50, 60, and 70 are displayed.

When an abnormality occurs in the hydraulic excavator and the sensor detects the abnormality, an abnormality signal is input to the controller 19. Then, the display screen 2 is switched from the state shown in FIG. 1A to the state shown in FIG. At the display location 30, caution marks 30 and 34 are displayed.
The mark 31 displayed at 0 is hidden.

On the other hand, by the switch operation of the operator,
The display screen 2 is the first screen (normal screen) shown in FIG.
To the second screen (maintenance screen) shown in FIG. 2 (b)
Are displayed on the display screen 2, the marks 41 to 51 are displayed.

Here, when an abnormality occurs in the hydraulic excavator and the abnormality is detected by the sensor, an abnormality signal is input to the controller 19. However, the display screen 2 maintains the state shown in FIG. That is, the maintenance marks 41 to 50,
The return mark 51 and the selection number 52 maintain the display state. The caution marks 33 and 34 are not displayed.

According to the first invention, when a specific signal, for example, an abnormal signal, is not inputted to the controller 19, the status display marks 21, 31, 41, 5 are displayed on the display screen 2.
1, 61, 71 are displayed, the caution marks 33, 34 are in a non-display state, and when a specific signal, for example, an abnormal signal, is input to the controller 19, a specific display that displays the predetermined state display mark 31 Since the caution marks 33 and 34 are displayed instead of the location 30, even if the number of the status display marks and the status change display marks increases, the same display of a limited area without reducing the size of each mark. Both the status display mark and the status change display mark can be simultaneously displayed on the screen 2. Therefore, the display device 1 does not become large and the visibility of the mark does not decrease. In addition, even when the state changes, the state display marks 21, 41, 51, 61, 71 are reliably displayed, so that there is no hindrance to the driving operation of a working machine such as a construction machine.

According to the first invention, when the operator performs a switch operation or the like to change the display screen from the first screen to the second screen, a specific mark corresponding to a specific signal is displayed on the display screen. To be displayed in the. Therefore, the operator can check the display content of the second screen without being disturbed by the specific mark.

According to a second aspect of the present invention, when the display screen transitions to the first screen and the second screen and a specific signal is input,
In a display device of a work machine that displays a specific mark at a position where a predetermined mark is displayed among a plurality of marks displayed on a first screen, when a display screen is transitioned to a second screen, When the specific signal is input, the second
The display content of the screen is maintained, and when the second screen transitions to the first screen, a specific mark is displayed at a position where a predetermined mark is displayed among a plurality of marks displayed on the first screen. Is displayed.

FIGS. 1 (a), 1 (b), 2
This will be described with reference to (a) and (b).

When the display screen 2 is the first screen (normal screen) and no abnormality has occurred in the excavator, as shown in FIG.
Marks 21, 31, 41, 51, 61, and 71 respectively associated with 30, 40, 50, 60, and 70 are displayed.

When an abnormality occurs in the hydraulic excavator and the sensor detects the abnormality, an abnormality signal is input to the controller 19. Then, the display screen 2 is switched from the state shown in FIG. 1A to the state shown in FIG. At the display location 30, caution marks 30 and 34 are displayed.
The mark 31 displayed at 0 is hidden.

On the other hand, by the switch operation of the operator,
The display screen 2 is the first screen (normal screen) shown in FIG.
To the second screen (maintenance screen) shown in FIG. 2 (b)
Are displayed on the display screen 2, the marks 41 to 51 are displayed.

Here, when an abnormality occurs in the hydraulic excavator and the sensor detects the abnormality, an abnormality signal is input to the controller 19. However, the display screen 2 maintains the state shown in FIG. That is, the maintenance marks 41 to 50,
The return mark 51 and the selection number 52 maintain the display state. The caution marks 33 and 34 are not displayed.

When the operator finishes checking the maintenance information and presses the return switch 51, the display screen 2 transits from the maintenance screen to the normal screen.

Then, as shown in FIG.
Marks 21, 41, 51, 61, 71 and caution marks 22, 42 corresponding to 0, 40, 50, 60, 70, respectively, are displayed. However, the mark 31 and the caution mark 32 corresponding to the specific display location 30 are in a non-display state. Then, caution marks 33 and 34 are lit on this specific display location 30.

According to the second aspect, the same effects as those of the first aspect can be obtained. When the operator performs a switch operation or the like to change the display screen from the second screen to the first screen, a specific mark corresponding to a specific signal is displayed on the display screen. Therefore, the operator can grasp the event corresponding to the specific mark.

According to a third aspect of the present invention, in the first and second aspects of the present invention, the specific mark is a mark indicating that an abnormality has occurred in a work machine requiring an immediate response, and does not require an immediate response. If a signal corresponding to the mark indicating that a malfunction of the work machine requiring immediate action has been input is classified into a mark indicating that a malfunction of the work machine has occurred, the second screen is displayed. Is displayed with a specific mark.

The third invention will be described.

As shown in FIG. 3A, when the display screen 2 is transiting to the maintenance screen and an abnormality occurs in the work machine and an abnormality is detected by the sensor, an abnormality signal is sent to the controller 19. Is entered. In the controller 19,
It is determined whether or not this abnormality is an abnormality that will cause serious damage to the work machine unless it is promptly dealt with. As shown in FIG. 3B, a caution mark 35 corresponding to the abnormality is displayed on the display screen 2.

According to the third aspect, when a minor abnormality occurs in the work machine, the operation on the second screen can be preferentially performed, and when a major abnormality occurs in the work machine,
The process corresponding to the abnormality can be preferentially performed.

According to a fourth aspect, in the first and second aspects, when the specific signal is input, the specific signal is input by means other than displaying a specific mark on the display screen. It is characterized by the fact that

In the fourth aspect, when an abnormality occurs in the hydraulic shovel and the sensor detects an abnormality while the display screen 2 is transitioning to the second screen, an abnormality signal is input to the controller 19. The caution marks 33, 3 are displayed on the display screen 2.
Although 4 is not displayed, the buzzer 17 emits a warning sound.

According to the fourth aspect, the operator can know that an abnormality has occurred.

According to a fifth aspect of the present invention, in the first and second aspects, each time a signal corresponding to a mark indicating that an abnormality has occurred in the work machine is inputted, a history of information indicating the content of the abnormality is recorded. It is characterized by.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A display device for a working machine according to the present invention will be described below with reference to the drawings using a monitor panel used in a hydraulic excavator according to one embodiment.

The state change display mark displayed on the display screen in this embodiment will be described as a caution mark displayed when an abnormality occurs.

The hydraulic excavator is provided with a traveling device including a traveling operation lever, a traveling hydraulic motor, a track, and the like. That is, when the traveling operation lever is operated, the traveling hydraulic motor is driven according to the operation of the traveling operation lever, and the crawler belt connected to the traveling hydraulic motor is rotated according to the driving of the traveling hydraulic motor. The hydraulic excavator also includes a working device including a working machine operating lever, a working machine hydraulic cylinder, a working machine (boom, arm, bucket), and the like. In other words, when the operating lever for the working machine is operated, the hydraulic cylinder for the working machine is driven according to the operation of the operating lever for the working machine, and the boom, arm and bucket connected to the hydraulic cylinder for the working machine drive the hydraulic cylinder for the working machine. It operates according to.

FIGS. 1A and 1B show the appearance of a display device 1 according to the embodiment. A display screen 2 and switches 3 to 15 are arranged on the outer surface of the display device 1, a buzzer 17 is provided outside the display device 1, and a storage unit 18 and a controller 19 are provided inside the display device 1. ing. The storage unit 18 and the controller 19 may be provided outside the display device 1. The display device 1 has a display function of the display screen 2 and an input operation function of inputting operation contents by pushing and operating the switches 3 to 15.

The temperature of the cooling water for the engine of the hydraulic excavator,
Each state of the operating oil temperature, fuel amount, and operating time is detected by each sensor. Then, the detection signal is sent to the controller 19.
The current state of the excavator is displayed on the display screen 2 of the display device 1 based on the detection signals of the respective sensors which are input to the display device 1 via the.

The switches 3 to 3 provided on the display device 1
By operating the device 15, a control signal corresponding to the operation content is output to the controller 19 for controlling the traveling device and the working device of the excavator, and the working state and the traveling state such as the working mode and the traveling speed are controlled. By appropriately operating the switches 3 to 15, the number of revolutions of the engine and the capacity of the hydraulic pump are controlled, and the flow rate of the pressure oil supplied to the hydraulic cylinder for the working machine is controlled. For this reason, the relationship between the operation amount of the operation lever for the work machine and the operation amount of the work machine (boom, arm, bucket), that is, the work mode is "heavy digging", "digging",
The user can select one of “rectification” and “fine operation”. By appropriately operating the switches 3 to 15, the capacity of the hydraulic pump and the capacity of the traveling hydraulic motor are controlled. For this reason, the traveling speed is set to “high speed (Hi)”, “medium speed (M
i) "or" low speed (Lo) ". The display screen 2 displays the currently selected work mode and the currently selected speed setting (running speed) as described later.

The display screen 2 is constituted by, for example, a liquid crystal display screen.

The display screen 2 has status display marks 21, 31, 41, 51, 61, 71 indicating the status of the excavator.
And caution marks 22, 32, 42, 33, 34 indicating an abnormality occurred in the hydraulic shovel.

That is, the display screen 2 includes the display portions 20 and 3
0, 40, 50, 60, and 70.

The display location 20 is associated with an engine water temperature display mark 21 and an engine water temperature caution mark 22, and the display location 40 is provided with a fuel amount display mark 41.
And the fuel quantity caution mark 42 are associated with each other,
An operating time display mark 51 is associated with the display location 50. The display location 60 is associated with a work mode display mark 61, and the display location 70 is associated with a traveling speed display mark 71.

On the other hand, at a specific display location 30, a hydraulic oil temperature display mark 31 and a hydraulic oil temperature caution mark 32
And the battery caution mark 33 and the engine hydraulic caution mark 34, for example.
Is associated with.

The engine water temperature display mark 21 has a gauge for indicating the temperature of the cooling water of the engine. The inclination angle of the gauge changes according to the detected water temperature of the corresponding sensor, and indicates the current water temperature value. . When the temperature detection value of the engine coolant rises and reaches an abnormal value, the engine water temperature caution mark 22 is lit in red, for example.

Similarly, the operating oil temperature display mark 31 has a gauge for indicating the operating oil temperature of the operating oil such as a hydraulic cylinder, and the inclination angle of the gauge changes according to the detected operating oil temperature of the corresponding sensor. Then, the current hydraulic oil temperature value is indicated.
When the temperature detection value of the hydraulic oil rises and reaches an abnormal value, the hydraulic oil temperature caution mark 32 is lit, for example, in yellow.

Similarly, the fuel amount display mark 41 has a gauge for indicating the fuel amount in the fuel tank, and the inclination angle of the gauge changes according to the detected fuel amount of the corresponding sensor, and the current fuel amount is displayed. (Remaining amount). When the detected fuel amount falls below a certain value, the fuel amount caution mark 42 is illuminated in red, for example.

The operating time display mark 51 displays the operating time of the engine as a numerical value.

The work mode display mark 61 displays the currently selected work mode by pictograms, and the display mode changes according to the selected work mode.

Similarly, the traveling speed display mark 71 indicates the currently selected traveling speed stage (speed setting of the traveling hydraulic motor).
Is displayed in pictograms, and the display mode changes according to the selected traveling speed stage.

The battery caution mark 33 indicates an abnormality in the battery voltage. When the detected battery voltage value of the corresponding sensor rises or falls and reaches an abnormal value, the battery caution mark 33 is lit, for example, in red. Similarly, the engine hydraulic caution mark 34
This indicates an abnormality of the engine. When the engine oil pressure value of the corresponding sensor decreases and reaches an abnormal value, the engine oil pressure caution mark 34 is illuminated in red, for example.

The storage unit 18 stores various histories such as histories indicating the contents of abnormalities that occur and histories indicating the contents of maintenance. As the history indicating the contents of the abnormality, the abnormality occurrence time and the number of times of occurrence of each component are stored. As the history indicating the maintenance contents, the last maintenance time, the specified maintenance time, the number of maintenance times, and the like for each component are stored.

The controller 19 controls the contents displayed on the display screen 2. Further, when a predetermined signal, for example, an abnormal signal from a sensor is input, the buzzer 17 emits a warning sound.

The contents displayed by the engine water temperature display mark 21, the fuel amount display mark 41, the operation time display mark 51, the work mode display mark 61, and the traveling speed display mark 71 are necessary for operating the hydraulic excavator. Information that needs to be constantly displayed on the display screen 2. The work mode and travel speed information displayed by the work mode display mark 61 and the travel speed display mark 71 are particularly important in driving operation.

On the other hand, the contents displayed by the operating oil temperature display mark 31 include other state display marks, that is, the engine water temperature display mark 21, the fuel amount display mark 41, the operating time display mark 51, the work mode display mark 61, The priority of the display is the lowest as compared with the traveling speed display mark 71. Even if the hydraulic oil temperature reaches an abnormal value, there is no particular problem in continuing the operation of the hydraulic shovel and continuing the operation of the work machine.

Therefore, in this embodiment, when an abnormality occurs in the hydraulic excavator, the hydraulic oil temperature display mark 31 and the hydraulic oil temperature caution mark 32, which have the lowest priority, are set to a non-display state. Mark 3
Lights 3 and 34 are displayed. Hereinafter, the operation of the display device 1 of FIG. 1 will be described.

When no abnormality has occurred in the hydraulic excavator, an engine water temperature display mark 21 and an engine water temperature caution mark 22 indicating the engine water temperature are displayed at a display portion 20 of the display screen 2, and the operating oil temperature is displayed at a display portion 30. Are displayed, and a fuel amount display mark 41 indicating a fuel amount and a fuel amount caution mark 42 are displayed at a display location 40. In addition, an operation time display mark 51 indicating the operation time is displayed on the display location 50.
Is displayed, a work mode display mark 61 indicating the currently selected work mode is displayed at a display location 60, and a traveling speed display mark 7 indicating the current speed setting is displayed at a display location 70.
1 is displayed. When no abnormality occurs, the engine water temperature caution mark 22, the working oil temperature display mark 32, and the fuel amount display mark 42 are not lit.

Here, if an abnormality occurs in the excavator,
For example, when an abnormality such as a decrease in the voltage of the battery and an abnormality such as a decrease in the oil pressure of the engine occur, the display screen 2
Is switched from the state shown in FIG. 1A to the state shown in FIG.

As shown in FIG. 1B, the display locations 20, 4
The status display marks 21, 41, 51, 61, 71 and the caution marks 22, 42 displayed on 0, 50, 60, 70 maintain their display states. However, the operating oil temperature display mark 31 and the operating oil temperature caution mark 32 displayed on the specific display portion 30 are in a non-display state. A battery caution mark 33 indicating an abnormality of a low battery voltage is provided at the specific display portion 30.
The engine oil pressure caution mark 34 indicating that the engine oil pressure has dropped is illuminated. If any one of the abnormalities is detected, one of the battery caution mark 33 and the engine hydraulic caution mark 34 is displayed.

When the sensor detects that the oil pressure of the engine has decreased, an abnormality signal from the sensor is input to the controller 19 and the buzzer 17 emits a warning sound. Therefore, the operator can know that an abnormality has occurred. Further, the occurrence time of the battery abnormality is recorded in the storage unit 18, and 1 is added to the occurrence count and recorded.

The operator operates the caution marks 33, 34.
The information necessary for the driving operation is recognized while each of the status display marks 21, 41, 5, while recognizing the abnormality that is currently occurring from the lighting display of.
It can be obtained from the display contents of 1, 61 and 71 and the driving operation can be continued. Alternatively, the driving operation can be stopped and appropriate measures can be taken. Moreover, display screen 2
Hydraulic oil temperature display mark 31,
Since the caution marks 33 and 34 are displayed instead of the hydraulic oil temperature caution mark 32 being hidden, even if the number of the status display mark and the caution mark increases, each mark is limited in the limited space of the display screen 2. It is possible to simultaneously display both the status display mark and the caution mark without reducing the size of the mark.

As described above, according to the present embodiment, when no abnormality has occurred, the status display marks 21, 31, 41, 51, 61, 71, the caution marks 22, 32, 42 is displayed and the caution mark 33 is displayed.
34 is set to a non-display state, and when an abnormality occurs, caution marks 33 and 34 are displayed instead of the specific display location 30 where the hydraulic oil temperature display mark 31 and the hydraulic oil temperature caution mark 32 were displayed. Therefore, even if the number of the status display mark and the caution mark increases, both the status display mark and the caution mark can be simultaneously displayed on the same display screen 2 having a limited area without reducing the size of each mark. Can be. Therefore, the display device 1 does not become large and the visibility of the mark does not decrease. In addition, even when an abnormality occurs, the status display marks 21, 41, 51, 61, 71 necessary for the driving operation are displayed, so that the operation of the hydraulic shovel is not hindered.

Next, as another embodiment, the operation of the display device 1 when an abnormality occurs in the excavator when the display screen 2 changes from the first screen to the second screen will be described with reference to FIG.
This will be described with reference to FIG.

FIG. 2A shows a normal screen, and FIG. 2B shows a maintenance screen.
(C) is a figure which shows the normal screen on which the caution mark was displayed.

In the following embodiment, the first screen is shown in FIG.
It is assumed that the screen is the normal screen shown in FIG.
It is assumed that the maintenance screen shown in FIG. Further, it is assumed that the specific signal is an abnormal signal transmitted from the sensor when the voltage of the battery decreases, and is an abnormal signal transmitted from the sensor when the hydraulic pressure of the engine decreases.

As shown in FIG. 2 (b), the display screen 2 after the transition to the maintenance screen has the engine oil mark 4
1, an engine oil filter mark 42, a fuel filter mark 43, a hydraulic oil filter mark 44, a hydraulic oil tank breather mark 45, a corrosion register mark 46, a damper case oil mark 47, and a final case oil mark 48. , A swing masturbation mark 49, a hydraulic oil mark 50, a return mark 51, and a selection number 52 are displayed. The maintenance marks 41 to 50 for which the maintenance time has arrived are displayed in yellow. If there are a plurality of parts whose maintenance time has arrived, the plurality of part marks are displayed in color.

As the selection number 52, a number corresponding to the mark at which the cursor is stopped among the marks 41 to 51 is displayed.

It is assumed that an abnormality has occurred in the excavator when a maintenance screen as shown in FIG. 2B is displayed on the display screen 2. As shown in FIG. 1B, when the caution marks 33, 34 are displayed at predetermined display locations, one of the maintenance marks 41 to 50 displayed at the predetermined display location is set to a non-display state. May be affected.

Then, the operator displays the maintenance marks 41 to 41 on the maintenance screen displayed by his / her own will.
50 cannot be confirmed. For this reason, it becomes impossible to grasp the maintenance information of the maintenance mark which is not displayed. Also, the maintenance marks 41 to 41 on the maintenance screen
When it is necessary to perform a switch operation or the like with reference to 50, the operator cannot refer to the maintenance marks 41 to 50, and a problem occurs that the switch operation cannot be performed.

If the display screen 2 is changed from the normal screen shown in FIG. 2A to a predetermined screen shown in FIG. 2B, for example, a maintenance screen, the caution mark 3 is displayed.
It is necessary to prevent 3 and 34 from being displayed on the display screen 2.

When the switch 11 is pressed by the operator while the normal screen as shown in FIG. 2A is displayed on the display screen 2, the display screen 2 is displayed as shown in FIG.
Is changed from the normal screen shown in FIG. 2 to the maintenance screen shown in FIG.

Here, it is assumed that, for example, an abnormality that the voltage of the battery decreases and an abnormality that the oil pressure of the engine decreases occur. When the charged amount of the battery becomes equal to or less than the predetermined voltage value, the controller 19 determines that the battery is abnormal.
When an abnormality signal is transmitted from the engine oil pressure sensor, the controller 19 determines that the abnormality is abnormal. However, even if these abnormal signals are input by the controller 19, the state shown in FIG. That is, the maintenance marks 41 to 50 and the return mark 5
1 and the selection number 52 maintain the display state. The caution marks 33 and 34 are not displayed.

Although the caution marks 33 and 34 are not displayed on the display screen 2 as described above, the buzzer 17 emits a warning sound. Therefore, the operator can know that an abnormality has occurred. Further, the occurrence time of the battery abnormality is recorded in the storage unit 18, and 1 is added to the occurrence count and recorded.

When the operator finishes checking the maintenance information and selects the return mark 51, the selection number 52 displays the number “11” corresponding to the return mark.
When the switch 15 is pushed, the display screen 2 transits from the maintenance screen to the normal screen.

Then, as shown in FIG.
At 0, 40, 50, 60, and 70, corresponding status display marks 21, 41, 51, 61, 71 and caution marks 22, 42 are displayed. But switch 11
Before the pushing operation, the operating oil temperature display mark 31 and the operating oil temperature caution mark 32 displayed on the specific display portion 30 are in a non-display state. At this specific display location 30, a battery caution mark 33 indicating an abnormality such as a decrease in battery voltage and an engine oil pressure caution mark 34 indicating an abnormality such as a decrease in engine oil pressure are displayed.

In this embodiment, when the marks 33 and 34 are displayed, the operating oil temperature display mark 31 and the operating oil temperature caution mark 32 are set to the non-display state. However, the hydraulic oil temperature display mark 31 and the hydraulic oil temperature caution mark 32 are not set to the non-display state, and the caution marks 33 and 34 are displayed so as to be superimposed on the hydraulic oil temperature display mark 31 and the hydraulic oil temperature caution mark 32. You may.

As described above, in the present embodiment, when the display screen 2 is transitioning from the normal screen to the maintenance screen, the caution marks 33 and 34 are set to the non-display state. However, if the sensor detects an abnormality that will cause serious damage to the excavator unless you take immediate action,
A caution mark may be displayed on the maintenance screen. Or, under the control of the controller 19,
The display screen 2 may be changed from the maintenance screen to the normal screen.

As shown in FIG. 3A, when the display screen 2 has shifted to the maintenance screen, an abnormality occurs in the hydraulic shovel, for example, an abnormality occurs in which the engine oil pressure decreases. When the sensor detects an abnormality,
An abnormal signal is input to the controller 19. The controller 19 determines whether or not the abnormality is an abnormality that causes serious damage to the excavator if the abnormality is not immediately addressed, and is determined to be an abnormality that causes serious damage to the excavator if the abnormality is not immediately addressed. Then, as shown in FIG. 3B, the caution mark 34 corresponding to the abnormality is displayed on the display screen 2.
Is displayed.

As another form in this case, FIG.
As shown in (c), the display screen 2 may be changed to the normal screen so that the caution mark 34 corresponding to the abnormality is displayed on the normal screen.

In the present embodiment, the description has been given assuming that the second screen is a maintenance screen. However, the present invention is not limited to this, and the caution mark can be predetermined to be set to the non-display state on a screen on which a mark that is not desired to be set to the non-display state is displayed. For example, in addition to the maintenance screen shown in FIG. 2B, a service screen as shown in FIG. 4 may be predetermined as the second screen.

In this embodiment, it has been described that the specific signal is an abnormal signal and the specific mark is a caution mark. However, the present invention is not limited to this. That is, when an operation signal is input to the controller 19 in accordance with the pressing operation of the switches 3 to 15, a mark corresponding to the switch operation is displayed at a specific display location on the display screen 2 and displayed at a specific display location. The present invention can be applied to a case where a mark that has been changed to a non-display state.

That is, some signal is sent to the controller 19.
The present invention is applied to a case where the signal content is displayed as a mark at a specific display location on the display screen 2 and the mark displayed at the specific display location is hidden. Can be applied.

As described above, according to the present embodiment, when the operator performs a switch operation or the like to change the display screen from the first screen to the second screen, a specific screen corresponding to a specific signal is displayed. Since the mark is not displayed on the display screen, the operator can check the display content on the second screen without being disturbed by the specific mark.

Further, according to the present embodiment, the operator performs a switch operation or the like to change the display screen from the second screen to the first screen.
When transitioning to the screen of, the specific mark corresponding to the specific signal is displayed on the display screen,
The operator can grasp the event corresponding to the specific mark.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a display device 1 according to an embodiment.

FIG. 2A is a diagram showing a normal screen, and FIG.
FIG. 2B is a diagram showing a maintenance screen, and FIG.
FIG. 3 is a diagram showing a normal screen on which a caution mark is displayed.

3A is a diagram illustrating a maintenance screen, FIG. 3B is a diagram illustrating a maintenance screen on which a caution mark is displayed, and FIG. 3C is a diagram illustrating a caution mark. It is a figure showing a normal screen.

FIG. 4 is a diagram showing a service screen.

FIG. 5 is a diagram showing a conventional technique.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Display device 2 Display screen 31 Hydraulic oil temperature display mark 32 Hydraulic oil temperature caution mark 33 Battery caution mark 34 Engine hydraulic caution mark 41 Engine oil mark 42 Engine oil filter mark 43 Fuel filter mark 44 Hydraulic oil filter mark 45 Hydraulic oil tank breather Mark 46 Corrosion register mark 47 Damper case oil mark 48 Final case oil mark 49 Swing mystery mark 50 Hydraulic oil mark

Claims (5)

[Claims] 1. A display screen transitions to a first screen and a second screen, and when a specific signal is input, a predetermined mark among a plurality of marks displayed on the first screen is displayed. In a display device of a work machine for displaying a specific mark at a position to be displayed, when the specific signal is input while the display screen is transitioned to the second screen, the display content of the second screen is maintained. A display device for a working machine, comprising: 2. The display screen transitions to a first screen and a second screen, and when a specific signal is input, a predetermined mark among a plurality of marks displayed on the first screen is displayed. In a display device of a work machine for displaying a specific mark at a position to be displayed, when the specific signal is input while the display screen is transitioned to the second screen, the display content of the second screen is maintained. When the second screen transitions to the first screen, a specific mark is displayed at a position where a predetermined mark is displayed among a plurality of marks displayed on the first screen. Work machine display device. 3. The specific mark includes a mark indicating that an abnormality has occurred in a work machine requiring immediate action, and a mark indicating that an error has occurred in a work machine that does not require immediate action. When a signal corresponding to a mark indicating that an abnormality of a work machine requiring immediate response has occurred is input, a specific mark is displayed on the second screen. The display device for a working machine according to claim 1. 4. When the specific signal is input,
By means other than displaying a specific mark on the display screen,
The display device for a work machine according to claim 1 or 2, wherein the display device notifies that a specific signal has been input. 5. The work according to claim 1, wherein a history of information indicating the contents of the abnormality is recorded each time a signal corresponding to a mark indicating that an abnormality has occurred in the work machine is input. Machine display device.