JP2006342524A - Construction machinery - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance maintainability of a vehicle by enabling an operator to easily memorize information on a component requiring maintenance. <P>SOLUTION: A display unit 11 comprises a key signal detecting part 12, an arithmetic processing part 13, a memory circuit 14, a display control part 15, a notification sound control part 16, and a screen part 17. When a key switch 8 of the vehicle is opened, icons 21-25 corresponding to the components requiring the maintenance are displayed on the screen part 17, and this display continues over a fixed period of setting time t0 needed to inform the operator that the components require the maintenance. Thus, since the operator can grasp the information on the components in proper timing, for example, when operations are finished or when the vehicle is stopped, he/she can memorize the following actions before a memory of the information on the components becomes unclear, for example, even if maintenance operations are performed after the stop of the vehicle, or even if the operator notifies a person in charge of information associated with the maintenance. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a construction machine suitably used as, for example, a hydraulic excavator, a hydraulic crane, a wheel loader, a bulldozer, a road roller, and the like, and more particularly, to a construction machine equipped with a display device that displays vehicle maintenance information.

  Generally, construction machines such as a hydraulic excavator, a hydraulic crane, a wheel loader, a bulldozer, and a road roller are equipped with various parts having different usage frequencies, durability, etc., and these parts have passed a predetermined time. It is preferable to perform maintenance such as replacement and replenishment of parts every time. For this reason, a display device that displays maintenance information of each component is mounted on the construction machine (see, for example, Patent Document 1).

JP 2002-327467 A

  This type of prior art construction machine has a self-propelled vehicle body provided with a working device operated by an operator seated in the driver's seat, and parts mounted on the vehicle body provided in the vicinity of the driver's seat. It is configured by a display device that displays information on the part when a maintenance time (for example, a time when replacement or refilling of parts is recommended) is reached.

  Here, the construction machine includes an hour meter that cumulatively measures the operation time of the vehicle, for example, and detects the maintenance time of each component based on the measurement time of the hour meter. As described above, parts for managing the maintenance time include, for example, engine oil, hydraulic oil, engine oil filter, hydraulic oil filter, fuel filter, and the like, and may include other consumable parts.

  The display device starts operating when, for example, a key switch of the vehicle is turned on (closed), and determines whether or not each component has reached the maintenance time. This determination process is executed for each part, and when necessary parts such as replacement and replenishment exist, an icon is displayed on the screen of the display device. Thereby, the operator can confirm the display content of the icon before turning off (opening) the key switch of the vehicle.

  By the way, in the construction machine of the above-mentioned prior art, when an abnormality occurs in main equipment such as an engine mounted on a vehicle, a hydraulic pump, etc., a radiator overheat, an alternator power generation stop, or the like occurs immediately. A warning lamp or the like is provided to warn that corrective action is required.

  On the other hand, information on the parts that have reached the maintenance time (for example, engine oil replacement time, reduction in remaining hydraulic oil, etc.) recommends relatively early maintenance, unlike warning lamps with high urgency. Only managed as information with low urgency.

  In this way, information such as an icon recommending maintenance is low in urgency unlike a warning lamp that displays a failure, for example. Rather, considering the case where maintenance work is performed after stopping, for example, when the work location is sent to the maintenance staff, etc., it is often desired to confirm the icon immediately before stopping the vehicle.

  However, the conventional display device is configured to display a maintenance icon when the vehicle key switch is in the ON state. For this reason, for example, when the operator finishes driving the vehicle and turns off the key switch, the operator may not be able to remember the displayed content of the icon, especially after long driving or busy work. Since they are often forgotten, there is a problem that maintenance work, messages of work parts, and the like are easily obscured.

  The present invention has been made in view of the above-described problems of the prior art. The object of the present invention is to ensure that components that require maintenance when the operation of the vehicle is finished, and to facilitate maintenance such as replacement and replenishment of components. It is to provide a construction machine that can be performed.

  In order to solve the above-described problems, the present invention provides a self-propelled vehicle body provided with a working device operated by an operator seated in a driver's seat, and a component provided in the vicinity of the driver's seat and mounted on the vehicle body. Is applied to a construction machine having a display device for displaying information on the part when the maintenance time is reached.

  And the feature of the configuration adopted by the invention of claim 1 is that the display device transmits information on the parts that have reached the maintenance time after the key switch of the vehicle body is opened and the operation is stopped to inform the maintenance time. The configuration is such that the display is performed before the necessary time elapses.

  According to a second aspect of the present invention, the display device is configured to display information on the component even when the key switch is closed.

  According to a third aspect of the present invention, there is provided a notification means for generating a notification sound or a sound when displaying the component information.

  According to the first aspect of the present invention, when the operator of the vehicle opens the key switch and finishes the work, the information on the parts that have reached the maintenance time can be displayed on the display device. Can continue for a certain amount of time needed to communicate. As a result, even if the operator forgets that the maintenance time for a part is close during the operation of the construction machine, the information on the part can be ensured at an appropriate timing such as when the work is finished or the vehicle is stopped. I can grasp it. For this reason, for example, even when the operator performs maintenance work after stopping, or contacts maintenance personnel of the leasing company with information related to maintenance, the operator should perform these actions while the parts information is clearly stored. Can do. Therefore, it is possible to prevent the maintenance of the vehicle from being lost due to a difference in memory or forgetfulness, and it is possible to smoothly perform maintenance such as replacement and replenishment of parts.

  According to the second aspect of the present invention, it is possible to display the information of the parts that have reached the maintenance time not only after the key switch is opened but also when the key switch is closed. As a result, even when the vehicle is in operation, the operator can freely check the component information as necessary, and the display device can be made easier to use.

  According to the invention of claim 3, for example, when replacement or refilling of parts is necessary, when the operator opens the key switch of the vehicle, a notification sound such as a buzzer or chime is sounded, or by voice. The part name can be read out. Thereby, even after, for example, long-time driving or busy work, the operator can be made sure of component information and the maintainability can be improved.

  Hereinafter, a construction machine according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  1 to 6 show a first embodiment. In this embodiment, a hydraulic excavator will be described as an example of a construction machine.

  In the figure, reference numeral 1 denotes a hydraulic excavator. The hydraulic excavator 1 is a self-propelled lower traveling body 2 and an upper revolving body that is mounted on the lower traveling body 2 so as to be able to swivel and constitutes a vehicle body together with the lower traveling body 2. 3 and a work device 4 which is provided on the front side of the upper swing body 3 so as to be able to move up and down and performs excavation work such as earth and sand.

  Here, the revolving frame 3A of the upper revolving structure 3 includes a cab 5 located on the front side thereof, a building cover 6 covering various devices mounted on the revolving frame 3A on the rear side of the cab 5, and a revolving frame 3A. A counterweight 7 located at the rear end is provided. In this case, the building cover 6 accommodates equipment (not shown) such as an engine, a hydraulic pump, a fuel tank, a hydraulic oil tank, etc., and an engine oil filter and fuel attached to these equipment. A filter, a hydraulic oil filter, and the like are arranged.

  A driver's seat 5A on which an operator is seated is provided in the cab 5, and a key switch 8 (see FIG. 4) for turning on and off the vehicle is operated in the vicinity of the driver's seat 5A. Various operating devices (not shown) and a display device 11 to be described later are provided. Furthermore, the excavator 1 is provided with an alternator 9 that generates electric power using the power of the engine, and various sensors 10 that detect the driving state of the vehicle.

  When the operator turns on (closes) the key switch 8, electricity is supplied from the power source such as a battery to the electric system of the vehicle, and the electric system becomes usable. In this state, when the engine is started using a starter motor or the like, hydraulic oil (pressure oil) is discharged from a hydraulic pump driven by the engine. The pressure oil is supplied to and discharged from various actuators mounted on the vehicle when the operator operates each operation device.

  Thereby, the operator can run the excavator 1 or turn the upper swing body 3, and can perform excavation work such as earth and sand by operating the work device 4. When the operation by the hydraulic excavator 1 is completed, the electric system of the vehicle can be shut off from the power source by turning off (opening) the key switch 8.

  Reference numeral 11 denotes a display device provided in the vicinity of the driver's seat 5A in the cab 5, and the display device 11 displays, for example, information (driving information) related to the driving state of the vehicle, various warnings, and the like. Further, as shown in FIGS. 2 and 3, the display device 11 displays icons 21 to 25 to be described later when various components mounted on the vehicle reach the maintenance time.

  Here, the maintenance time is a time when it is recommended to perform maintenance such as replacement and replenishment in consideration of, for example, the use time of parts and the degree of wear. In the present embodiment, engine oil, hydraulic oil, engine oil filter, hydraulic oil filter, fuel filter, and the like will be described as examples of parts for managing maintenance timing (hereinafter referred to as maintenance target parts). Shall.

  Further, as shown in FIG. 4, the display device 11 is roughly configured by a key signal detection unit 12, an arithmetic processing unit 13, a storage circuit 14, a display control unit 15, a notification sound control unit 16, and a screen unit 17 which will be described later. . And the display apparatus 11 displays the information of the components which reached the maintenance time with the icons 21-25 by performing the control process shown in FIG. 5, FIG.

  In this case, the icons 21 to 25 are displayed while the key switch 8 of the vehicle is closed and until a set time t0 of about 10 seconds elapses after the key switch 8 is opened and the operation is stopped. Between. Here, the set time t0 is set as a time sufficient to inform the operator of maintenance time information and grasp the information. The display device 11 is configured to turn off (shut off) its own power supply after the set time t0 has elapsed.

  Reference numeral 12 denotes a key signal detection unit connected to the key switch 8. The key signal detection unit 12 receives a key signal corresponding to the open / closed state of the switch from the key switch 8, as shown in FIG. . As a result, the key signal detection unit 12 detects the open / closed state of the key switch 8 and outputs a detection signal to the arithmetic processing unit 13.

  Reference numeral 13 denotes an arithmetic processing unit composed of, for example, a CPU (Central Processing Unit), etc. The alternator 9, various sensors 10, a key signal detection unit 12, and the like are connected to the input side of the arithmetic processing unit 13 to perform arithmetic operations. A display control unit 15, a notification sound control unit 16, and the like are connected to the output side of the processing unit 13. And the arithmetic processing part 13 performs the arithmetic processing relevant to the driving information of a vehicle, various warning displays, etc. using the signal input from various sensors 10, for example.

  Further, the arithmetic processing unit 13 adds a time value H of an hour meter 20 described later only while an operation signal is input from the alternator 9, and whether or not each component has reached the maintenance time based on this time value H. The determination part which determines these for every component is comprised. And the arithmetic processing part 13 outputs the driving | operation information of a vehicle, for example, and the information of components which require a maintenance to the display control part 15 and the notification sound control part 16 as a control signal.

  Reference numeral 14 denotes a storage circuit for inputting / outputting data to / from the arithmetic processing unit 13, and the storage circuit 14 is configured by, for example, a non-volatile memory (RAM, EEPROM) that holds stored data even in a non-energized state. ing.

  Here, for example, when N parts to be maintained consisting of engine oil, hydraulic oil, engine oil filter, hydraulic oil filter, fuel filter, and the like are first, second, third,..., Nth parts, The storage circuit 14 stores a plurality of previous maintenance times T (n) indicating the time when the previous replacement, replenishment, or the like was performed for each maintenance target part (n = 1, 2). , 3, ..., N).

  In addition, an appropriate time interval for exchanging and replenishing components is set in advance for each maintenance target component, and these time intervals are stored in the storage circuit 14 as a plurality of maintenance intervals D (n). It is remembered. That is, for example, in the case where the hydraulic oil filter that should be replaced every 1000 hours is the fourth maintenance target part, the storage circuit 14 has data set as maintenance interval D (4) = 1000. It is remembered. Further, the storage circuit 14 also stores a notification flag F (n) described later.

  The arithmetic processing unit 13 uses the data in the storage circuit 14 to determine whether or not a certain component has reached the maintenance time as follows. First, the previous maintenance time T (n) of the relevant part is subtracted from the current time value H of the hour meter 20, and the elapsed time (HT (n)) that has elapsed after the replacement and replenishment of this part is calculated. Next, by comparing this elapsed time with the maintenance interval D (n) of the component, for example, when the elapsed time (HT (n)) exceeds the maintenance interval D (n), the component is maintained. It can be determined that the time has come.

  A display control unit 15 is connected to the output side of the arithmetic processing unit 13, and the display control unit 15 controls the display content of the screen unit 17 in cooperation with the arithmetic processing unit 13. And the display control part 15 displays the driving information of a vehicle according to the control signal input from the arithmetic processing part 13, and displays the icons 21-25 of a maintenance object component.

  A notification sound control unit 16 is connected to the output side of the arithmetic processing unit 13, and the notification sound control unit 16 controls a notification sound generating device 26 described later according to a control signal input from the arithmetic processing unit 13. This generates a notification sound.

  Reference numeral 17 denotes a screen portion on which various types of information are displayed. The screen portion 17 is configured as a monitor whose display contents are switched in accordance with, for example, the driving state of the vehicle or the operation of the operator. As shown in FIG. A fuel gauge 18 that displays the remaining amount of water, a water temperature gauge 19 that displays the temperature of engine cooling water, and the like are disposed on the front surface of the display device 11.

  The screen unit 17 displays, for example, an hour meter 20 for measuring and displaying the operation time of the vehicle, icons 21 to 25, and the like. Further, the screen unit 17 is configured such that, for example, when the operator performs a specific screen switching operation or the like, various other operation information (for example, an oil temperature gauge indicating the temperature of the hydraulic oil) is displayed. Yes. FIG. 2 shows the arrangement of all the icons 21 to 25. In the normal operation state, only the icons of the parts that have reached the maintenance time are displayed as shown in FIG. It is kept hidden.

  21 is an icon for the engine oil that can be displayed on the screen unit 17. This icon 21 is displayed when the engine oil has reached the maintenance time. By notifying the operator of this state, for example, the engine oil is displayed. Replacement, replenishment, etc. are recommended. Reference numerals 22, 23, 24, and 25 denote icons for notifying that the hydraulic oil, the engine oil filter, the hydraulic oil filter, and the fuel filter have reached the maintenance time, respectively.

  26 is a notification sound generating device as notification means constituted by, for example, a buzzer, a chime, etc. This notification sound generating device 26 is driven by the notification sound control unit 16. The notification sound generator 26 generates a notification sound for a certain time (for example, the same time as the set time t0) after the key switch 8 is opened when there is a part that has reached the maintenance time. The operator is notified by sound that necessary parts are present.

  On the other hand, reference numeral 27 denotes an update button attached to the arithmetic processing unit 13 of the display device 11. The update button 27 is operated when, for example, replacement or replenishment of parts to be maintained is completed. In this case, when the maintenance of a certain part is completed, for example, when the update button 27 is operated in a state where a specific operation for designating the part is performed, the data of the last maintenance time T (n) of the designated part is displayed as an hour meter. Rewritten by 20 current time values H.

  The display device 11 of the excavator 1 according to the present embodiment has the above-described configuration. Next, the control process will be described with reference to FIG.

  First, in step 1, it is determined whether or not the key switch 8 is closed by using the detection result of the key signal detection unit 12. If “YES” is determined, the hour meter adding process is performed in steps 2 and 3. Do. This addition process can also be performed independently by other processes executed in parallel with the control process of FIG.

  In step 2, it is determined whether or not the alternator is operating, that is, whether or not the engine is in operation. If it is determined “YES”, the time value H of the hour meter 20 is added in step 3. Then, the process proceeds to Step 4 described later.

  If “NO” is determined in step 2, the process proceeds to step 4 without performing step 3. In step 4, the maintenance time determination process described later is executed for all the maintenance target parts, and then the process returns to step 1 and the processes in steps 1 to 4 are repeated until the key switch 8 is opened.

  On the other hand, when it is determined as “NO” in Step 1, since the operator has opened the key switch 8, in Step 5, the notification flags F (n) of all the maintenance target parts are read (n = 1, 2, 3, ..., N). The notification flag F (n) is, for example, stored and held in the storage circuit 14 corresponding to each maintenance target component. In the maintenance timing determination process described later, each component reaches the maintenance timing. Is determined to be “0” or “1” depending on the determination result.

  In step 6, it is determined whether any flag among all the notification flags F (n) is set to “1”. If it is determined “YES”, a part that has reached the maintenance time is determined. Since it exists, a notification operation to the operator is performed in step 7 and subsequent steps. If “NO” is determined in the step 6, the process ends in a later-described step 13.

  Next, in step 7, the timer t is started from zero and measurement of the notification time is started. In step 8, the nth icon whose notification flag F (n) is “1” among the icons 21 to 25 of the display device 11, that is, the icon of the component that has reached the maintenance time is displayed on the screen unit 17. To do. In step 9, the notification sound generator 26 is operated to generate a notification sound for the operator.

  Next, in step 10, for example, it is determined whether or not the value of the timer t exceeds the set time t0 with respect to the set time t0 stored in advance in the storage circuit 14. When it is determined as “YES” in step 10, since the set time t 0 sufficient for the operator to see the icons 21 to 25 and grasp the information of the maintenance time has elapsed, in step 11, the icons 21 to 25 are displayed. After the display is terminated and the notification sound is stopped in step 12, the process ends in step 13. If it is determined “NO” in step 10, steps 1, 5 to 10 are repeated until the set time t0 elapses.

  Next, a maintenance time determination process performed for each individual maintenance target component will be described with reference to FIG.

  First, in step 21, the previous maintenance time T (n) and the maintenance interval D (n) of the nth maintenance target part are read from the storage circuit 14.

  In step 22, it is determined whether or not the update button 27 has been operated for the n-th component. If “YES” is determined, the previous maintenance time T (n) is determined in step 23 as the current time value of the hour meter 20. After rewriting with H, go to step 24. If “NO” is determined in step 22, the process proceeds to step 24 without performing step 23.

  Next, in step 24, using the current time value H of the hour meter 20 and the previous maintenance time T (n), the elapsed time (HT (n)) that has elapsed since this part was replaced and replenished. Calculate to determine whether the elapsed time (HT (n)) exceeds the maintenance interval D (n).

  When it is determined “YES” in step 24, the n-th component has reached the maintenance time. Therefore, in step 25, the n-th notification flag F (n) is set to “1”, and in step 26, the n-th icon corresponding to the component among the icons 21 to 25 is displayed, and then described later. Go to step 29.

  If “NO” is determined in step 24, the n-th notification flag F (n) is cleared to “0” in step 27, and in step 28, the icon of the part is not displayed, and then step 29 is performed. Move on.

  Next, in step 29, it is determined whether or not the determination process has been completed for all the maintenance target parts. If it is determined “YES”, the process returns in step 30. If “NO” is determined in the step 29, the steps 21 to 30 are repeated until the determination process for all the parts is completed.

  In this way, when the key switch 8 of the excavator 1 is closed and the vehicle is operating, when any part reaches the maintenance time, maintenance of the part is recommended as shown in FIG. One of the icons 21 to 25 is displayed.

  In this state, when the driving of the vehicle is finished and the operator opens the key switch 8, a notification sound that draws the operator's attention is generated by the notification sound generating device 26, and the icon displayed during driving is displayed. It continues for a predetermined set time t0, and then the power of the display device 11 is shut off. Thereby, the operator can re-recognize the display of the icon at the end of the operation.

  Thus, according to the present embodiment, the display device 11 detects the open / closed state of the key switch 8 by the key signal detection unit 12, so that the key switch 8 closes the information of the parts that have reached the maintenance time. Display is performed until the set time t0 has elapsed since the key switch 8 was opened.

  As a result, when the operator of the vehicle opens the key switch 8 and finishes the work, information on the parts that have reached the maintenance time can be displayed on the display device 11, and this display is displayed by the operator using the icons 21 to 25. It can be continued for a set time t0 necessary for grasping the maintenance time. For this reason, even if the operator forgets the maintenance time of a part during operation of the construction machine, for example, when the work is finished or the vehicle is stopped, the information on the part is surely grasped at an appropriate timing. can do.

  Therefore, even when the operator performs maintenance work after stopping, for example, or when the maintenance staff of the leasing company is notified of maintenance related information, these actions can be performed while the storage of the parts information is clear. it can. Thereby, it is possible to prevent the maintenance of the vehicle from being lost due to a difference in memory or forgetfulness, and it is possible to smoothly perform maintenance such as replacement and replenishment of parts.

  In the present embodiment, not only after the key switch 8 is opened, but also when the key switch 8 is closed, information on the parts that have reached the maintenance time can be displayed. As a result, the operator can freely check the component information as necessary even during operation of the vehicle, and can make the display device 11 easier to use.

  Further, since the notification sound generating device 26 is used, for example, when replacement or replenishment of parts is necessary, a notification sound such as a buzzer or chime is sounded when the operator opens the key switch 8 of the vehicle. be able to. Thereby, even after, for example, long-time driving or busy work, the operator can be made sure of component information and the maintainability can be improved.

  Next, FIG. 7 shows a second embodiment according to the present invention, and the feature of this embodiment is that it is configured to notify by voice when there is a part that has reached the maintenance time. In the present embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

  Reference numeral 31 denotes a sound generation device as a notification means attached to the display device 11 in place of the notification sound generation device 26 of the first embodiment. The sound generation device 31 reads a component name by, for example, synthesized speech. It is connected to the output side of the notification sound control unit 16 '.

  When the operator opens the key switch 8, the icon of the component that has reached the maintenance time is displayed on the display device 11 for a predetermined time, and the name of the component is read out by the sound generating device 31.

  Thus, in the present embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment. In particular, in the present embodiment, since the sound generating device 31 is used, for example, when replacement or replenishment of parts is necessary, when the operator opens the key switch 8 of the vehicle, the parts are output by voice. You can read the name. This makes it possible for the operator to be sure of the parts information even after long hours of operation or busy work, for example, and to clearly store the parts that require maintenance for the operator. it can.

  Next, FIG. 8 shows a third embodiment according to the present invention. The feature of this embodiment is that when the key switch is closed, the information on the parts that have reached the maintenance time is not displayed. The information of the parts is displayed after the key switch is opened.

  Here, the maintenance time determination process shown in FIG. 8 is executed in place of the maintenance time determination process (see FIG. 6) of the first embodiment. In steps 31 to 34, the first embodiment is performed. The same processing as that of the form is executed. However, in this embodiment, steps 26 and 28 of the first embodiment are omitted.

  For this reason, in this embodiment, when the nth part reaches the maintenance time, and it is determined “YES” in step 34, the notification flag F (n) is only set to “1” in step 35. Thus, without displaying the icon of this part, the process proceeds to the determination process for other parts in step 37. If “NO” is determined in the step 34, the notification flag F (n) is cleared to “0” in a step 36, and the process proceeds to the step 37.

  Then, in step 37, as in the first embodiment, steps 31 to 37 are repeated until the determination process for all parts is completed.

  Thereby, when the key switch is closed, the component icon is not displayed. When the key switch is opened, the icon of the part that has reached the maintenance time is displayed for the set time by referring to the value of the notification flag F (n), as in the first embodiment. Can do.

  Thus, in the present embodiment configured as described above, it is possible to obtain substantially the same operational effects as those of the first embodiment.

  In each of the above embodiments, the engine oil, the hydraulic oil, the engine oil filter, the hydraulic oil filter, the fuel filter, and the like have been described as examples of the maintenance target parts. However, the present invention is not limited to these components, and can be applied to any component mounted on a construction machine.

  Further, in the embodiment, for example, the time for replacement and replenishment of parts is set as the maintenance time. However, the present invention is not limited to this. For example, the time for performing the adjustment of the mounting state of components, various inspections, cleaning, and the like may be set as the maintenance time.

  Furthermore, in the embodiment, the hydraulic excavator 1 has been described as an example. However, the present invention is not limited to the hydraulic excavator, and can be widely applied to various construction machines including, for example, a hydraulic crane, a wheel loader, a bulldozer, and a load roller. Is.

It is a front view which shows the hydraulic shovel applied to the 1st Embodiment of this invention. It is a front view which shows the display apparatus in FIG. 1 in the state which displayed all the icons. It is a front view which shows the state which one part icon of the display apparatus displayed. It is a block diagram which shows the whole structure of a display apparatus. It is a flowchart which shows the control processing of a display apparatus. It is a flowchart which shows the maintenance time determination process in FIG. FIG. 5 is a configuration diagram similar to FIG. 4 showing a display device of a hydraulic excavator according to a second embodiment of the present invention. FIG. 7 is a flowchart similar to FIG. 6 illustrating a maintenance time determination process for a hydraulic excavator according to a third embodiment of the present invention.

Explanation of symbols

1 Excavator (construction machine)
2 Lower traveling body (car body)
3 Upper swing body (car body)
4 Working device 5 Cab 5A Driver's seat 8 Key switch 11 Display device 12 Key signal detection unit 13 Arithmetic processing unit 14 Storage circuit 15 Display control unit 16, 16 'Notification sound control unit 17 Screen unit 18 Fuel meter 19 Water temperature meter 20 Hour meter 21 -25 Icon 26 Notification sound generator (notification means)
31 Voice generator (notification means)
t0 set time

Claims (3)

A self-propelled vehicle body provided with a work device operated by an operator seated in the driver's seat and information on the parts when the components mounted in the vicinity of the driver's seat and mounted on the vehicle body have reached the maintenance time In a construction machine provided with a display device for displaying
The display device is configured to display information on the parts that have reached the maintenance time from when the key switch of the vehicle body is opened and the operation is stopped until a time necessary for transmitting the maintenance time elapses. Construction machine characterized by that.   The construction machine according to claim 1, wherein the display device is configured to display information on the component even when the key switch is closed.   The construction machine according to claim 1, further comprising a notification unit that generates a notification sound or a sound when displaying information on the component.

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