JP2012160085A - Maintenance method of construction machine and maintenance system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To determine "to maintain a construction machine of any one machine type more preferentially than a construction machine of other machine types" by comparing data between the construction machines of different machine types in accordance with the same criterion.SOLUTION: For each type of construction machine, a plurality of abnormality determination items to be determined are set and a point is allocated for each abnormality determination item beforehand (101). Each time an abnormality is determined, a numerical value is calculated by converting the point allocated to a determination item of the corresponding abnormality into a ratio of one abnormality determination item with respect to the number of all the abnormality determination items being set to a corresponding construction machine, and a current cumulative point of the relevant construction machine is calculated by adding the calculated numerical value to a cumulative point obtained in the past (103). The current cumulative points obtained for a plurality of construction machines are ranked (104) and the construction machines are maintained in accordance with a maintenance priority order corresponding to the ranking of the current cumulative points (105).

Description

The present invention relates to a method and a maintenance system for maintaining a construction machine.

  Construction machines need to be maintained regularly or at an appropriate time. This is because repair costs (parts and labor costs) increase and a significant downtime is required if a serious failure is caused by neglecting maintenance of construction machinery necessary at an appropriate time. is there. Conversely, if maintenance of construction machinery necessary at an appropriate time is carried out, serious breakdowns can be avoided, repair costs (maintenance costs) as a whole can be reduced, and downtime can be minimized. it can. For this reason, construction machines need to be maintained regularly or at an appropriate time.

(Conventional technology)
The internal conditions such as engine oil temperature and exhaust temperature of the construction machine are detected by each sensor provided in the construction machine, and the detected sensor data is stored in the controller inside the construction machine, and it is remote from the construction machine. The data stored in the controller is collected by sending it to the computer in the control office or by connecting a personal computer to the construction machine, and the "health condition" of the construction machine is diagnosed by analyzing the collected data Therefore, it is currently undertaken to perform necessary maintenance at an appropriate time.

(Prior art 1 found in patent literature)
In Patent Document 1 below, a score is given to a construction machine, and every time an abnormal phenomenon such as overheating occurs, the number of subtraction points associated with the abnormal phenomenon is subtracted from the score, so that the score is predetermined. An invention is described in which maintenance is performed when the score is reached.

(Prior Art 2 found in Patent Literature)
Patent Document 2 below collects internal state data from each construction machine including different models, stores maintenance condition data for each model of the construction machine, and parts and maintenance that require maintenance of a certain construction machine. An invention is described in which the time is extracted from the data on the internal state of the construction machine and the data on the maintenance conditions corresponding to the model of the construction machine.

Japanese Patent Laid-Open No. 11-36381 JP 2002-23831 A

  There are cases where a plurality of construction machines including different models are operated at one work site. Currently, in many such work sites, a plurality of construction machines including different models are systematically maintained to reduce downtime. For example, in a work site such as a wide area mine, one hydraulic excavator is assigned to a plurality of dump trucks, and loading work is performed. Here, if the excavator enters maintenance and is suspended, if the alternative vehicle cannot be used, the entire work site cannot be operated, resulting in significant downtime. To avoid this situation, the maintenance time is adjusted among multiple construction machines, including different models, so that maintenance can be performed at an appropriate time when the alternative vehicle is convenient. It is important to formulate a maintenance plan that does not lead to

However, in the past, there has been no particular standard for adjusting the maintenance time between different types of construction machines. In some cases, a maintenance plan that depends on the experience of the person who prepares the maintenance plan is formulated.

For example, in the conventional implementation technology, if it is between construction machines of the same model, the sensor detection value data is compared and analyzed based on the same standard, so the priority of maintenance can be determined. it can. The same model means construction machines having the same function and configuration, such as hydraulic excavators having the same model, vehicle grade, or specifications, or dump trucks having the same model, vehicle grade, or specifications. However, there is no one that should be the same standard when comparing the data between different types of construction machines. “Maintenance of one type of construction machine is given priority over other types of construction machines. It was not possible to judge. Different models mean construction machines with different functions and configurations, such as a hydraulic excavator and a bulldozer, or a hydraulic excavator and a dump truck.

That is, if the model of the construction machine is different, the number of abnormality judgment items to be judged and the abnormality judgment items themselves are different, which hinders comparing the data of construction machines of different models with the `` same standard ''. Yes. For example, a hydraulic excavator generally does not have a transmission composed of a hydraulic clutch, but a dump truck has a transmission composed of a hydraulic clutch. When comparing with an excavator in which an abnormality occurred, it was difficult to determine the priority of maintenance by giving superiority or inferiority to both. The same applies to “Prior Art 1 found in Patent Literature” and “Prior Art 2 found in Patent Literature”.

The present invention has been made in view of such a situation, and allows data of different types of construction machines to be compared on the same basis. The solution is to make it possible to determine that maintenance should be given priority over construction machinery.

The first invention is
A method for maintaining a plurality of construction machines including different types,
For each type of construction machine, set a plurality of abnormality judgment items to be judged,
Compare the ratio of the number of occurrences of abnormalities to the number of judgment items for all abnormalities set for each type of construction machine.
The maintenance priority that is higher for construction machines having a higher ratio is displayed on a display device provided for each construction machine or a display device that can be wired or wirelessly communicated with each construction machine, and the construction machine is maintained. To do.

The second invention is the first invention,
The priority order is displayed on a display device provided in a cab of each construction machine or a display device provided outside the construction machine.

The third invention is
A method for maintaining a plurality of construction machines including different types,
For each type of construction machine, set a plurality of abnormality judgment items to be judged, and assign a score to each abnormality judgment item,
Each time an abnormality is determined, the number of points assigned to the corresponding abnormality determination item is multiplied by the ratio of one abnormality determination item to the total number of abnormality determination items set for the corresponding construction machine. Obtain a numerical value, add the obtained numerical value to the numerical value obtained in the past, and the obtained numerical value is the current cumulative score of the construction machine,
The present invention is characterized in that the current cumulative score obtained for each of a plurality of construction machines is ranked, and the construction machine is maintained with a maintenance priority according to the current cumulative score ranking.
The fourth invention is
A maintenance system for maintaining a plurality of construction machines including different types,
For each type of construction machine, a plurality of abnormality determination items to be determined are set, a score is assigned in advance for each abnormality determination item, and storage means for storing these data,
A plurality of detection means for detecting the internal state of the construction machine;
An abnormality determining means which is provided outside the construction machine or the construction machine and determines an abnormality according to the detection result of the detecting means;
Each time it is determined as abnormal by the abnormality determination means, the number of points assigned to the corresponding abnormality determination item and the ratio of one abnormality item to the total abnormality determination item number set for the corresponding construction machine A cumulative number calculating means for obtaining a numerical value obtained by multiplying, adding the obtained numerical value to a numerical value obtained in the past, and using the obtained numerical value as a current cumulative score of the construction machine;
A ranking of the current cumulative points obtained for each of a plurality of construction machines, and a maintenance priority calculating means for obtaining a maintenance priority according to the current cumulative score ranking, with the determined maintenance priority, It is characterized by maintaining construction machines.
A fifth invention is the fourth invention,
A first display device provided in each construction machine;
A second display device capable of wired or wireless communication with each construction machine,
The obtained maintenance priority order is displayed on the first display device and / or the second display device.
A sixth invention is the fifth invention,
For each construction machine,
A communication means capable of wireless communication between construction machines;
The cumulative score calculating means,
In each construction machine or a specific construction machine among the construction machines,
The maintenance priority order calculating means is provided,
The current cumulative score is acquired by each construction machine or a specific construction machine via the communication means,
The maintenance priority order is obtained by the maintenance priority order calculating means of each construction machine, or the maintenance priority order is obtained by the maintenance priority order calculating means of the specific construction machine, and each construction machine is connected via the communication means. By acquiring the maintenance priority in
The maintenance priority order is displayed on a display device provided in each construction machine.
A seventh invention is the fourth invention,
The number of points assigned to each abnormality judgment item is
The site point corresponding to the site of each construction machine,
Weight points assigned to the detection means associated with the site;
And a weight point assigned to an error code generated according to the detection result of the detection means.

  In the present invention, “different types” is a concept including “different models, different models, different vehicle grades, different specifications”. For example, hydraulic excavators and dump trucks are not only different models but also hydraulic excavators. Among the same model, models with different models, vehicle grades, and specifications are also “different types”.

  If the type of construction machine is different, the number of abnormality judgment items to be judged is different. However, if it is a type of construction machine with a large number of abnormal judgment items, it is easy to generate (detect) an abnormality, and if it is a type of construction machine with a small number of abnormal judgment items, it is difficult to generate (detect) the abnormality. I can say that. Therefore, the type of construction machine with a larger number of abnormality judgment items has a lower importance of each abnormality, and the maintenance priority needs to be lowered and the estimated priority should be lowered. In addition, it is necessary to increase the priority of maintenance and increase the estimated priority for construction machines with a greater number of abnormal occurrences.

The first invention is based on such knowledge, and a plurality of abnormality determination items to be determined are set for each type of construction machine, and an abnormality occurs with respect to the number of determination items of all abnormalities set in the construction machine. The ratio of the number of times is compared between the construction machines, and the construction machine is maintained in the priority order in which the higher the ratio is, the higher the construction machine is. Therefore, for example, even if the number of occurrences of abnormality is the same, a construction machine with a smaller number of abnormal items has a higher priority and a higher priority for maintenance. Conversely, even if the number of occurrences of abnormality is greater than that of other types of construction machines, the priority of maintenance may be lower than that of other construction machines if the total number of abnormal items is small.

According to the first invention, it becomes possible to compare data between different types of construction machines on the same basis, and “one of the types of construction machines takes precedence over the other types of construction machines. Then you should be able to determine.
In the second invention, since the priority is displayed on the display device provided in the cab of each construction machine, the operator can know the priority of maintenance of the construction machine operated by the operator himself, It is possible to know the priority of maintenance of construction machines other than the construction machine to be operated. In addition, since the priority is displayed on the display device provided on the outside of each construction machine, it is possible for a person around the construction machine, for example, a service person, to know the priority of maintenance of each construction machine operating at the work site. You will be able to formulate a maintenance plan.

If the type of construction machine is different, the abnormality determination item may be different, or even if the abnormality determination item is the same, the importance may differ depending on the type of construction machine. For example, even if an abnormality occurs in the same part of the engine, the importance is different between the dump truck and the hydraulic excavator.

In consideration of this, in the third invention, it is possible to assign an appropriate score according to the difference in importance for each abnormality determination item for each type of construction machine. In the third invention, a score is assigned to each abnormality determination item in this way, a numerical value obtained by converting the score according to the “ratio” similar to the first invention is obtained, a cumulative score of the numerical value is obtained, and the cumulative value is obtained. Maintenance is performed in the priority order of maintenance corresponding to the ranking of the points. Thereby, the maintenance priority order can be accurately determined between construction machines including different models.

The fourth invention is an invention in which the method of the third invention is replaced with a system, and the same effect as the third invention can be obtained.
According to the fifth invention, since the maintenance priority is displayed on the first display device of each construction machine, the operator of each construction machine or a person around the construction machine can perform maintenance of each construction machine as in the second invention. You can know the priority. In addition, because the maintenance priority is displayed on the second display device that can communicate with each construction machine in a wired or wireless manner, for example, the maintenance priority of each construction machine is known at a control office located far from the work site. Be able to develop a maintenance plan.
According to the sixth aspect of the invention, the maintenance priorities are obtained by communicating with each other between the construction machines and displayed on the display device of each construction machine.
According to the seventh aspect, since the number of points assigned to each abnormality determination item is constituted by the part point, the weight point, and the weight point, the importance degree is determined for each abnormality determination item. Appropriate points can be assigned according to the difference, and the maintenance priority can be accurately determined between construction machines including different models.

FIG. 1 is a diagram showing a construction machine maintenance system described in the embodiment. FIG. 2 is a diagram illustrating an internal configuration of the construction machine. FIG. 3 is a flowchart showing the flow of processing described in the embodiment. FIG. 4 is a diagram illustrating items for determining abnormality of a construction machine configured as a hydraulic excavator. FIG. 5 is a diagram illustrating items for determining abnormality of a construction machine configured as a dump truck. FIG. 6 is a diagram illustrating an example of displaying the maintenance priority order when the display device is installed outside the construction machine. FIG. 7 is a diagram illustrating an example of a display screen in which information related to maintenance priority is displayed on the display screen of the display device.

(First embodiment)
Embodiments of a maintenance method and a maintenance system for a construction machine according to the present invention will be described below with reference to the drawings.

  FIG. 1 shows a construction machine maintenance system 1 according to the present invention.

  A plurality of construction machines 11, 12, 13, 14... Are operating in the work site 2 including cases of different types. For example, the construction machine 11 is a dump truck, the construction machine 12 is a hydraulic excavator, the construction machine 13 is a wheel loader, and the construction machine 14 is a bulldozer, which are different types of construction machines. In addition, even in the same type of construction machine, for example, the same excavator, different types, vehicle grades, specifications, etc. are treated as “different types” of construction machines. For example, a crushed stone hydraulic excavator, a standard hydraulic excavator, and a breaker hydraulic excavator are “different types” of construction machines even if they are the same hydraulic excavator.

  Hereinafter, taking the construction machine 12 (hydraulic excavator) as an example, the internal configuration of the construction machine 12 will be described with reference to FIG.

  In the vehicle body 12a of the construction machine 12, a recording controller 20 for recording detection data obtained from various sensors described later, a display controller 21, and various controllers 22 corresponding to the functions of the construction machine 12, Are connected to each other via an in-vehicle network 29 (for example, CAN (Controller Area Network)) so as to be able to transmit and receive data to and from each other. For example, the construction machine 12 that is a hydraulic excavator is provided with an engine controller 22, a pump controller 23, a work machine controller 24,... Corresponding to the functions of the hydraulic excavator. The work machine controller 24 may be integrated with the pump controller 23. It is assumed that the controllers 22, 23, 24,... Have different specifications such as number and type depending on the functions of the construction machines 11, 12, 13, 14,. For example, the construction machine 11 which is a dump truck is provided with a transmission controller (not shown).

  The construction machine 12 is provided with a sensor group 40 including sensors 40a, 40b. Each sensor 40a, 40b ... detects the internal state of the construction machine 12. As for each sensor 40a, 40b, etc., the specifications such as the number and type differ depending on the function of each construction machine 11, 12, 13, 14.

  The sensors 40a, 40b,... Are connected to the corresponding controllers 22, 23, 24,.

  For example, the engine speed sensor 40 a, the engine oil temperature sensor 40 b, the engine water temperature sensor 40 c, and the like are connected to the engine controller 22. The engine speed sensor 40 a detects the engine speed (not shown), and a detection signal indicating the engine speed is input to the engine controller 22. The engine oil temperature sensor 40 b detects the oil temperature of the engine oil (engine oil temperature) for cooling or lubricating the engine, and a detection signal indicating the engine oil temperature is input to the engine controller 22. The engine water temperature sensor 40c detects the water temperature (engine water temperature) of the cooling water (coolant) for cooling the engine, and a detection signal indicating the engine water temperature is input to the engine controller 22.

When the construction machine 12 is a hydraulic excavator, the work machine is configured by a bucket, an arm, and a boom, and each is driven by a hydraulic cylinder. Even if there is only one hydraulic pump that supplies the hydraulic oil to the hydraulic cylinder, even if the hydraulic pump is provided for each hydraulic cylinder, this embodiment can be realized. The boom (or arm or bucket) cylinder pump pressure sensor 40d, the fan pump pressure sensor 40e, the boom (or arm or bucket) cylinder pump command current sensor 40f, the fan pump command current sensor 40g, etc. are connected to the pump controller 23. It is connected. The boom (or arm or bucket) cylinder pump pressure sensor 40d detects the discharge pressure of hydraulic oil discharged from a boom (or arm or bucket) cylinder pump (not shown). A detection signal indicating the discharge pressure is input to the pump controller 23. The fan pump pressure sensor 40e detects the discharge pressure of hydraulic oil discharged from a fan pump (not shown), and a detection signal indicating the discharge pressure of the fan pump is input to the pump controller 23. The boom (or arm or bucket) cylinder pump and the fan pump are connected to each other, and both are driven by the engine. The boom (or arm or bucket) cylinder pump is a hydraulic pump (for example, a swash plate hydraulic pump) that drives a boom cylinder (not shown), and the fan pump rotationally drives a fan that blows air to an engine radiator (not shown). It is a hydraulic pump. The boom (or arm or bucket) cylinder pump command current sensor 40f detects a command current for driving and controlling the boom (or arm or bucket) cylinder pump, and a detection signal indicating the command current is sent to the pump controller 23. Entered. The fan pump command current sensor 40 g detects a command current for driving and controlling the fan pump, and a detection signal indicating this command current is input to the pump controller 23.

  Further, the boom (or arm or bucket) cylinder rising pressure sensor 40h, the boom (or arm or bucket) cylinder lowering pressure sensor 40i, and the like are connected to the work machine controller 24. The boom (or arm or bucket) cylinder rising pressure sensor 40h detects an increase in the hydraulic pressure in the hydraulic pipe when a boom (or arm or bucket) cylinder (not shown) extends, and the boom (or arm or bucket) cylinder A detection signal indicating the upper boost is input to the work machine controller 24. The boom (or arm or bucket) cylinder lower pressure drop sensor 40i detects the lower pressure drop of the hydraulic pressure in the hydraulic piping when the boom (or arm or bucket) cylinder contracts, and lowers the lower pressure of the boom (or arm or bucket) cylinder. Is input to the work machine controller 24.

  The vehicle body 12a is further provided with an atmospheric temperature sensor 40j for detecting the atmospheric temperature, an engine exhaust temperature sensor 40k for detecting the exhaust temperature of the engine, and the like. For example, the engine exhaust temperature sensor 40k is provided in each of four exhaust manifolds (hereinafter referred to as NO.1, NO.2, NO.3, and NO.4) of the engine. Some of these sensors 40j... 40k are connected to the recording controller 29 via the signal line 31 without passing through the in-vehicle network 29.

  The engine controller 22 generates a control command signal based on an operation signal according to an operation of a fuel adjustment dial or an operation lever (not shown) by an operator of the construction machine 12 and detection signals of the sensors 40a, 40b, 40c, etc. Control the output of. Further, the engine controller 22 determines whether the internal state of the construction machine 12 is normal or abnormal based on the detection signals of the connected sensors 40a, 40b, 40c and the like. An error code indicating the error content corresponding to is generated. Detection signals from the sensors 40a, 40b, 40c and the like input to the engine controller 22 and error codes generated by the engine controller 22 are sent to the recording controller 20 via the in-vehicle network 29. The error code is displayed as characters or symbols on the display screen 36 a of the display device 36 via the display controller 21.

  The pump controller 23 generates a control command signal based on an operation signal corresponding to an operation of an operation lever (not shown) by an operator of the construction machine 12 and a detection signal of each sensor 40d, 40e, 40f, 40g, etc. Arms and buckets) Control various hydraulic pumps such as cylinder pumps and fan pumps. The pump controller 23 determines whether the internal state of the construction machine 12 is normal or abnormal based on detection signals from the corresponding sensors 40d, 40e, 40f, 40g, etc. An error code indicating an error message corresponding to is generated. Detection signals from the sensors 40d, 40e, 40f, 40g, etc. input to the pump controller 23 and error codes generated by the pump controller 23 are sent to the recording controller 20 via the in-vehicle network 29. The error code is displayed as characters or symbols on the display screen 36 a of the display device 36 via the display controller 21.

The work machine controller 24 generates a control command signal based on detection signals from the corresponding sensors 40h, 40i, and controls each work machine actuator such as a boom (or arm or bucket) cylinder. The work machine controller 24 determines whether the internal state of the construction machine 12 is normal or abnormal based on detection signals from the corresponding sensors 40h and 40i. Generate an error code indicating an error message. Detection signals from the sensors 40h, 40i and the like input to the work machine controller 24 and error codes generated by the work machine controller 24 are sent to the recording controller 20 via the in-vehicle network 29. The error code is displayed as characters or symbols on the display screen 36 a of the display device 36 via the display controller 21.

Detection signals from the atmospheric temperature sensor 40j, the engine exhaust temperature sensor 40k, and the like are also input to the recording controller 20 via the signal line 31.

Up to this point, the construction machine 12 that is a hydraulic excavator has been described, but the construction machine 11 that is a dump truck is provided with a transmission controller (not shown). The transmission is composed of hydraulic clutches such as shift clutches (for example, a first-speed clutch, a second-speed clutch, a third-speed clutch, and a fourth-speed clutch). Is engaged by engaging the selected shift clutch. Shifting is performed by supplying the clutch pressure for a predetermined trigger time and supplying the clutch pressure for a predetermined filling time. In addition, a clutch pressure sensor (not shown) for detecting the clutch pressure of each shift clutch, a transmission output shaft rotation sensor (not shown) for detecting the rotation speed of the output shaft of the transmission, and the like are provided. It is connected. Similarly, the transmission controller generates an error code, and the detection signal of each sensor input to the transmission controller and the error code generated by the transmission controller are sent to the recording controller 20 via the in-vehicle network 29.

The construction machine 11 that is a dump truck is also provided with an engine exhaust temperature sensor 40b and the like similar to those of the construction machine 12, and detection signals from the engine exhaust temperature sensor 40b and the like are sent to the recording controller 20 via the signal line 31. Entered.

The recording controller 20 includes an input / output unit 20a, a storage unit 20b, and an arithmetic processing unit 20c. For example, the input / output unit 20a is an input / output terminal such as an input / output port, the storage unit 20b is configured by a memory such as a ROM or a RAM, and the arithmetic processing unit 20c is configured by a numerical arithmetic processor such as a CPU.

Data sent to the recording controller 20 via the in-vehicle network 29 and the signal line 31 (detection signals sent from the sensors and error codes sent from the controllers) are stored in the storage unit via the input / output unit 20a. 20b. The data sent to the recording controller 20 is stored in the storage unit 20b after a predetermined calculation is performed by the arithmetic processing unit 20c, while the data sent to the recording controller 20 is: In some cases, the arithmetic processing unit 20c reads out data stored in the storage unit 20b and performs arithmetic processing according to a predetermined program. Hereinafter, unless otherwise specified, the data stored in the storage unit 20b refers to both data calculated by the arithmetic processing unit 20c and data not calculated by the arithmetic processing unit 20c. The data stored in the storage unit 20b is sent to the transceiver 32 via the input / output unit 20a.

The transceiver 32 can transmit and receive with an external transceiver device. The transceiver 32 is provided not only in the construction machine 12 but also in the other construction machines 11, 13, 14.

However, data transmission / reception is divided into the following patterns depending on the function of the transceiver 32, communication infrastructure, system purpose, and the like.

Pattern 1) When the transmitter / receiver 32 has a function capable of wireless communication within a limited area represented by a wireless LAN, the transmitter / receiver 32 is, for example, around the work site 2 as shown in FIG. Data is transmitted / received to / from the transmitting / receiving device 51 of the installed monitoring station 50. Data transmitted from the transceiver 32 of the construction machine 11, 12, 13, 14... To the monitoring station 50 is received by the transmission / reception device 51 of the monitoring station 50 and taken into the computer 52 of the monitoring station 50. Processing is performed. The computer 52 of the monitoring station 50 is operated by a user or an administrator of the construction machines 11, 12, 13, 14,. As a result, the users of the construction machines 11, 12, 13, 14,... Can know the priority of maintenance of the construction machines 11, 12, 13, 14,. A maintenance plan can be formulated.

Pattern 2) When the transmitter / receiver 32 has a function capable of wireless or wired communication (with the whole world) represented by a communication satellite 37 and the Internet 38, the transmitter / receiver 32 is, for example, a work Data is exchanged with the transmission / reception device 61 of the control office 60 installed in the factory, office, construction machine manufacturer and sales company (collectively, hereinafter referred to as the control office 60) located at a location remote from the site 2. Are sent and received. Data transmitted from the transceiver 32 of the construction machine 11, 12, 13, 14... To the control office 60 is received by the transmission / reception device 61 of the control office 60, and is taken into the computer 62 of the control office 60 and stored in the database 63. And the computer 62 processes the data. The computer 62 of the control office 60 is operated by, for example, a manager of a factory that maintains the construction machines 11, 12, 13, 14,. As a result, the manager of the factory that maintains the construction machines 11, 12, 13, 14,... Gives priority to the maintenance of each construction machine 11, 12, 13, 14,. You can know and develop a maintenance plan.

Pattern 3) When the transmitter / receiver 32 is not provided, that is, when the construction machines 11, 12, 13, 14,... Have a structure incapable of transmitting / receiving to / from an external facility, the input / output unit 20a of the recording controller 20 is dedicated. It is possible to connect to an external personal computer 34 via the tool 33. The dedicated tool 33 is an adapter suitable for an input / output terminal provided on the construction machine 11, 12, 13, 14..., A communication cable, or an adapter suitable for an input / output terminal provided on the personal computer 34. It is composed of two members and further includes a program for downloading data recorded in the recording controller 20. The input / output terminals provided in the construction machines 11, 12, 13, 14... Are electrically connected to the storage unit 20b. As a result, the data recorded in the recording controller 20 is downloaded to the personal computer 34 and the personal computer 34 processes the data. The personal computer 34 is operated by, for example, a service person who checks the construction machines 11, 12, 13, 14. Thereby, the service person inspecting the construction machines 11, 12, 13, 14,... Knows the priority of maintenance of each construction machine 11, 12, 13, 14,. Can prepare a maintenance plan.

As shown in FIG. 2, the data stored in the storage unit 20b of the recording controller 20 is sent to the inter-vehicle communication transceiver 35 via the input / output unit 20a.

The inter-vehicle communication transmitter / receiver 35 is composed of short-range communication means such as infrared communication, and can transmit / receive to / from other construction machines (vehicles) in the work site 2. The inter-vehicle communication transmitter / receiver 35 is provided not only in the construction machine 12 but also in the other construction machines 11, 13, 14. In addition, a short-distance communication means capable of infrared communication is provided in a vehicle (for example, an automobile) other than a construction machine (not shown) that circulates in the work site 2, and communication between the construction machine 12 and the vehicle other than the construction machine is performed. It is also possible to plan. By doing so, a vehicle other than the construction machine acquires data, and the acquired data is downloaded to the computer 52 of the monitoring station 50 or the computer 62 of the control office 60, thereby giving priority to maintenance as described later. Rank calculation processing can be performed.

The display controller 21 is a controller that controls the display device 36. The display device 36 includes a display screen 36a. The display screen 36a is a display such as a liquid crystal panel. The data stored in the storage unit 20 b of the recording controller 20 is sent from the input / output unit 20 a to the display controller 21 via the in-vehicle network 29 and is taken into the display controller 21. A display command signal is output from the display controller 21 to the display device 36, and the content of the data stored in the storage unit 20 b of the recording controller 20 is displayed on the display screen 36 a of the display device 36. The display device 36 is installed in a place visible from the outside of the operator's cab of the construction machine 12 or the outside of the vehicle body 12a of the construction machine 12. The display device 36 may be installed both in the cab of the construction machine 12 and in a place visible from the outside of the vehicle body 12a of the construction machine 12. When the display device 36 is installed in the cab of the construction machine 12, the operator of the construction machine 12 can know the priority of maintenance of the construction machine 12 that is operated by the operator as described later. In addition, when the display device 36 is installed in a place visible from the outside of the vehicle body 12a of the construction machine 12, an operator such as another construction machine 11, 13, 14... Or the construction machine 11, 13, 14. Can know the priority of maintenance of the construction machine 12 and the like. The display device 36 is similarly provided not only in the construction machine 12 but also in the other construction machines 11, 13, 14. Therefore, similarly, the operators of the construction machines 11, 13, 14... Can know the priority of maintenance of the construction machines 11, 13, 14. It is possible to know the priority of maintenance of construction machines other than the construction machine to be operated. In addition, when the display device 36 is installed in the cab, the display device 36 may be configured by a liquid crystal panel, a touch panel, or a plurality of LEDs (light emitting diodes). Use to display the maintenance priority. In addition, when the display device 36 is installed in a place that can be seen from the outside of the construction machine, specifically, as shown in FIG. 6, the display device 36 is composed of a liquid crystal panel and a plurality of LEDs (light emitting diodes), and characters and symbols. The maintenance priority is displayed in a form such as a graphic. As shown in FIG. 6, it is set so that A, B, and C are displayed in descending order of maintenance priority, and a signal corresponding to the maintenance priority obtained by the arithmetic processing unit 20c as described later is sent. When the display device 36 receives and, for example, the display screen 36a is composed of a plurality of LEDs (light emitting diodes), the LEDs (light emitting diodes) are lit to display characters such as A and B in response to the received signal. Or blink. Note that the structure of the display device 36 in this case is a size that can be visually recognized from the outside, is waterproof, and prevents the display screen 36a from being damaged by rocks or the like colliding with the display screen 36a. It is preferable that a guard net or a tempered glass (not shown) is provided on the front surface of.

The processing flow of the first embodiment will be described below with reference to the flowchart of FIG. Below, unless otherwise indicated, the construction machine 12 that is a hydraulic excavator and the construction machine 11 that is a dump truck will be described as examples.

  In the first embodiment, the case where the calculation of the maintenance priority order is performed inside the construction machines 11 and 12 and data indicating the maintenance priority order is sent to the outside of the vehicle body. Further, a case where data is sent from the construction machines 11 and 12 to the external monitoring station 50 according to the pattern 1 is taken as an example.

(Process of setting abnormality determination items for each construction machine and assigning points for each abnormality determination item; step 101)
The storage unit 20b of the construction machines 11 and 12 is set with all abnormality determination items of its own construction machine, and score data is stored in advance for each abnormality determination item. That is, the memory | storage part 20b comprises the memory | storage means of this invention.

  FIG. 4 shows determination items for abnormality of the construction machine 12, and FIG. 5 shows determination items for abnormality of the construction machine 11.

  An abnormality determination item is an item for which abnormality is to be determined. A sensor abnormality determination item in which abnormality determination is performed by comparing the detection value of each sensor 40a, 40b,. This includes both error code abnormality determination items for which abnormality determination is performed.

The sensor abnormality determination item sets a threshold value that can determine whether each sensor 40a, 40b,... Is normal or abnormal, and compares the detected value with the threshold value. It is an abnormality determination item that is determined to be abnormal when the threshold value is greater than (or less than) the threshold value.

For example, if the detected value of the boom (or arm or bucket) cylinder pump pressure sensor 40d provided in the construction machine 12 is less than or equal to the threshold value, “the boom (or arm or bucket) cylinder pump pressure is abnormal. (It is an abnormally low value) "and the abnormality determination item is" pump pressure for boom (or arm or bucket) cylinder "(see FIG. 4).

The error code abnormality determination item is an abnormality determination item that is determined to be abnormal when the error code is generated. Based on the detection signal of each sensor 40a, 40b, it is determined whether it is normal or error. If it is an error, an error code corresponding to the degree of the error is generated, and the error content indicated by the error code is This is a judgment item for error code abnormality. That is, for example, four locations NO. 1, NO. 2, NO. 3, NO. The error code abnormality determination items generated based on the detection signal of the engine exhaust temperature sensor 40k of No. 4 are “exhaust temperature is very high (perform maintenance immediately)”, “exhaust temperature is Moderately high (save output and use, perform maintenance after stopping) ”,“ Exhaust temperature is moderately high (perform the next periodic maintenance) ”. For example, the error code abnormality determination items obtained from the four engine exhaust temperature sensors 40k are “NO.1 exhaust temperature very high”, “NO.2 exhaust temperature very high”, and “NO.3 exhaust temperature emergency "No. 4 Exhaust temperature is very high" (see FIG. 4).

The abnormality determination items are determined in the same manner for the construction machine 11 (see FIG. 5).

Allocation of points (points) to abnormality determination items is also performed for each of the construction machines 11 and 12.

Points (points) are assigned in consideration of the following points.

1) A related part to which an abnormality judgment item belongs A part point is set in consideration of whether a related part to which an abnormality judgment item belongs is important for the construction machine. Here, the related part to which the abnormality determination item belongs is a part that needs to be inspected and repaired when it is determined to be abnormal. As the importance of the related part is high and the priority of the maintenance is high, a large part point is given. In this embodiment, the importance of the part is divided into three levels, and the higher the importance, the part points are “1 point” (low importance), “2 points” (medium importance), “3 points” (importance) High). A site point “3 points” or “2 points” is given to a site related to an operation such as an engine or a transmission, and a site point “1 point” is given to other sites.

  The construction machine 12 that is a hydraulic excavator is classified as being composed of parts such as an engine, a hydraulic device, and a vehicle body.

  Sensor abnormality determination item “engine speed”, which is determined to be abnormal by comparing the detection signals of the engine speed sensor 40a, engine oil temperature sensor 40b, engine water temperature sensor 40c, and four engine exhaust temperature sensors 40k with threshold values, "Engine oil temperature", "engine water temperature", "NO.1 exhaust temperature", "NO.2 exhaust temperature", "NO.3 exhaust temperature", "NO.4 exhaust temperature", etc. are parts called "engine" This is a determination item of abnormality belonging to. Abnormality is determined by the engine controller 22. Therefore, for each sensor abnormality determination item, for example, “2 points” part points are given in consideration of the importance of the part “engine” (see FIG. 4).

As shown in FIG. 4, there are a total of 12 items for determining sensor abnormality belonging to the part “engine” of the construction machine 12. Therefore, the ratio of one sensor abnormality determination item to the number of all sensor abnormality determination items set in the “engine” part of the construction machine 12 (hereinafter referred to as a ratio R1) is:
R1 = 1/12 (1)
It becomes.

Boom (or arm or bucket) cylinder pump pressure sensor 40d, fan pump pressure sensor 40e, boom (or arm or bucket) cylinder pump command current sensor 40f, fan pump command current sensor 40g, boom (or arm or bucket) cylinder Sensor abnormality determination items “boom cylinder pump pressure” and “fan pump pressure” that are determined to be abnormal by comparing the detection signal of the upper pressure increase sensor 40h and the boom (or arm or bucket) cylinder lower pressure decrease sensor 40i with a threshold value. “Boom cylinder pump command current”, “fan pump command current”, “boom cylinder rising pressure”, “boom cylinder lower pressure drop”, and the like are determination items of abnormality belonging to the part “hydraulic equipment”. Therefore, for each sensor abnormality determination item, a part point of “3 points” is given in consideration of the importance of the part “hydraulic device” (see FIG. 4).

As shown in FIG. 4, there are a total of 21 items for determining sensor abnormality belonging to the part “hydraulic equipment” of the construction machine 12. Therefore, the ratio of one sensor abnormality item to the number of all sensor abnormality determination items set in the “hydraulic equipment” part of the construction machine 12 (hereinafter referred to as a ratio R2) is:
R2 = 1/21 (2)
It becomes.

For the sensor abnormality determination item belonging to the part “body” of the construction machine 12, for example, a part point of “1 point” is given in consideration of the importance of the part “body”.

As shown in FIG. 4, there are a total of two items for determining sensor abnormality belonging to the part “vehicle body” of the construction machine 12.

  On the other hand, also about the determination item of the error code abnormality of the construction machine 12, the part point according to the related part is given like the determination item of the sensor abnormality.

  “NO.1 exhaust temperature is very high”, “NO.2 exhaust temperature is very high”, “NO.3 exhaust temperature is very high”, “NO.4 exhaust temperature is very high”, “engine water temperature An error code abnormality determination item such as “overheat” is an abnormality determination item belonging to the part “engine”. Therefore, for each error code abnormality determination item, for example, “2 points” part points are given in consideration of the importance of the part “engine” (see FIG. 4).

As shown in FIG. 4, there are a total of 117 determination items for error code anomalies belonging to the part “engine” of the construction machine 12. Accordingly, the ratio of one error code abnormality determination item to the number of all error code abnormality determination items set in the “engine” part of the construction machine 12 (hereinafter, referred to as a ratio R3) is:
R3 = 1/117 (3)
It becomes.

An error code abnormality determination item such as “the fan pump pressure is very high” is an abnormality item belonging to the part “hydraulic device”. Therefore, for each error code abnormality determination item, for example, “3 points” of site points are given in consideration of the importance of the site “hydraulic equipment” (see FIG. 4).

As shown in FIG. 4, there are a total of 92 items for determining error code anomalies belonging to the part “hydraulic equipment” of the construction machine 12. Therefore, the ratio of one error code abnormality determination item to the number of all error code abnormality determination items set in the “hydraulic equipment” portion of the construction machine 12 (hereinafter referred to as a ratio R4) is:
R4 = 1/92 (4)
It becomes.

The construction machine 11 which is a dump truck is classified as being composed of parts such as an engine, a transmission, a work machine, a brake, and a vehicle body.

  Sensor abnormality determination items “NO.1 exhaust temperature”, “NO.2 exhaust temperature”, “NO.3 exhaust temperature”, “NO.4 exhaust temperature”, etc. are abnormality determination items belonging to the part “engine”. It is. Therefore, for each sensor abnormality determination item, for example, a “3 point” part point is given in consideration of the importance of the part “engine” (see FIG. 5).

As shown in FIG. 5, there are a total of 11 determination items for sensor abnormality belonging to the part “engine” of the construction machine 11. Therefore, the ratio of one sensor abnormality determination item to the number of all sensor abnormality determination items set in the “engine” part of the construction machine 11 (hereinafter referred to as a ratio R5) is:
R5 = 1/11 (5)
It becomes.

The “second-speed clutch filling time” is a sensor abnormality determination item indicating an abnormality in the filling time of the second-speed clutch of the transmission. The “second-speed clutch trigger time” is a sensor abnormality determination item indicating an abnormality in the trigger speed of the transmission second-speed clutch.

Sensor abnormality determination items “second-speed clutch filling time”, “second-speed clutch trigger time”, and the like are abnormality determination items that belong to the part “transmission”. Therefore, for each sensor abnormality determination item, a part point of “3 points” is given in consideration of the importance of the part “transmission” (see FIG. 5).

As shown in FIG. 5, there are a total of 16 items for sensor abnormality determination items belonging to the “transmission” part of the construction machine 11. Therefore, the ratio of one sensor abnormality determination item to the number of all sensor abnormality determination items set in the “transmission” portion of the construction machine 11 (hereinafter referred to as a ratio R6) is:
R6 = 1/16 (6)
It becomes.

For the sensor abnormality determination item belonging to the part “work machine” of the construction machine 11, for example, “2 points” part points are given in consideration of the importance of the part “work machine”.

As shown in FIG. 5, there are a total of three items for determining abnormality of sensors belonging to the part of the construction machine 11 called “work machine”.

For the sensor abnormality determination item belonging to the part “brake” of the construction machine 11, for example, a part point “3 points” is given in consideration of the importance of the part “brake”.

As shown in FIG. 5, there are a total of three items for determining sensor abnormality belonging to the part “brake” of the construction machine 11.

For the sensor abnormality determination item belonging to the part “body” of the construction machine 11, for example, a part point of “1 point” is given in consideration of the importance of the part “body”.

As shown in FIG. 5, there are a total of five items for determining sensor abnormality belonging to the part “vehicle body” of the construction machine 11.

  On the other hand, a part point corresponding to the related part is similarly given to the determination item of the error code abnormality of the construction machine 11.

  Error code abnormalities such as “NO.1 exhaust temperature is very high”, “NO.2 exhaust temperature is very high”, “NO.3 exhaust temperature is very high”, “NO.4 exhaust temperature is very high” The determination item is an abnormality determination item belonging to the part “engine”. Therefore, for each error code abnormality determination item, for example, a “3 point” part point is given in consideration of the importance of the part “engine” (see FIG. 5).

As shown in FIG. 5, there are a total of 114 determination items for error code abnormality belonging to the “engine” part of the construction machine 11. Therefore, the ratio of one error code abnormality determination item to the number of all error code abnormality determination items set in the “engine” part of the construction machine 11 (hereinafter referred to as a ratio R7) is:
R7 = 1/114 (7)
It becomes.

The “double engagement of the shift clutch” is an error code abnormality determination item that the shift clutch of the transmission is double engaged. This error is determined based on the detection signal of the clutch pressure sensor of each shift clutch. The “slip of the second speed clutch” is an error code abnormality determination item that the second speed clutch of the transmission is slipping. This error is determined by comparing the engine speed detected by the engine speed sensor 40a with the transmission output shaft speed detected by a transmission output shaft speed sensor (not shown).

Error code abnormality determination items such as “double engagement of a shift clutch” and “slip of a second speed clutch” are abnormality determination items belonging to the part “transmission”. Therefore, for each error code abnormality determination item, in consideration of the importance of the part “transmission”, for example, a part point of “3 points” is given (see FIG. 5).

As shown in FIG. 5, there are a total of 106 determination items for error code anomalies belonging to the part “transmission” of the construction machine 11. Therefore, the ratio of one error code abnormality determination item to the number of all error code abnormality determination items set in the “transmission” portion of the construction machine 11 (hereinafter referred to as a ratio R8) is:
R8 = 1/106 (8)
It becomes.

As described above, if the type of the construction machine is different, the type of the part is different, and the importance is different even in the same part. In consideration of this, a site point is determined for each type of construction machine. For example, even if an abnormality occurs in the same part of the engine, since the importance is different between the dump truck and the hydraulic excavator, the part points are made different.

2) Weight of abnormality determination item A weight point is set in consideration of whether an abnormality determination item is important for the construction machine. The higher the importance of the abnormality determination item and the higher the maintenance priority, the larger weight points are assigned. In this embodiment, the importance of the abnormality determination item is divided into three levels, and the higher the importance, the more weight points are “1 point” (low importance), “2 points” (medium importance), and “3 points”. (High importance).

  The weight points for each abnormality determination item are listed in FIGS. For example, the sensor abnormality determination items such as “NO.1 exhaust temperature”, “NO.2 exhaust temperature”, “NO.3 exhaust temperature”, and “NO.4 exhaust temperature” of the construction machine 12 include a weight point “3 points”. Is given (FIG. 4).

Regarding the error code abnormality determination items, the importance is divided into three levels according to the error contents of the error code. For example, “NO.1 exhaust temperature is very high”, “NO.2 exhaust temperature is very high”, “NO.3 exhaust temperature is very high”, “NO.4 exhaust temperature is very high” A weight point “3 points” is given to the error code abnormality determination item “high” (FIG. 4).

3) Elapsed time The elapsed time point is set in consideration of the elapsed time since the previous maintenance was performed. As an abnormality that occurs at a point when the elapsed time is long, the importance is high and the maintenance priority is high, and a larger elapsed time point is assigned to the abnormality determination item. For the elapsed time (H; hour), data of operating time measured by a service meter (not shown) provided in the construction machines 11 and 12 is used. In this embodiment, for example, periodic maintenance is performed every 10000H on average. In this embodiment, the elapsed time is divided into three stages, and the elapsed time approaches the average maintenance time (10000H), giving priority to maintenance. The higher the degree is, the larger the elapsed time points are given as “1 point” (low priority), “2 points” (medium priority), and “3 points” (high priority). For example, if the elapsed time from the previous maintenance is less than 5000H, the elapsed time point is set to “1 point”, and if the elapsed time from the previous maintenance is from 5000H to less than 8000H, the elapsed time point is set to “2 points”. If the elapsed time from the maintenance is 8000H or more, the elapsed time point is set to “3 points”.

For example, the sensor abnormality determination items such as “NO.1 exhaust temperature”, “NO.2 exhaust temperature”, “NO.3 exhaust temperature”, and “NO.4 exhaust temperature” of the construction machine 12 are 6000H from the previous maintenance. If it is determined as abnormal, an elapsed time point “2 points” is given.

4) Environmental load It is possible to give an environmental load point in consideration of the load due to the environment of the work site 2 where the construction machines 11 and 12 operate.

For example,
a) Environmental load points according to the frequency of going up and down the driving route b) Environmental load points according to the average temperature of the work site 2 c) According to the soil quality (limestone, soft soil, hard soil, etc.) of the work site 2 Environmental load points d) Environmental load points according to the accessibility (difficulty) of the approach distance and time of service personnel to the work site 2 e) Parts required for maintenance (bucket case, hydraulic oil, filter) The environmental load point according to the stock amount of

  For example, the construction machine 11 that operates in the work site 2 where the travel route is greatly undulated and the traveling up and down is frequently performed has a larger load on the engine than the construction machine 11 traveling on a flat road. A) “Environmental load point according to the frequency of going up and down the travel route” is set to a higher score than the “Environmental load point” of the construction machine 11 traveling on a flat road.

5) Management state Management points can be given in consideration of the management state of the construction machines 11 and 12.

  For example, in a work site 2 such as a wide area mine, one hydraulic excavator is assigned to a plurality of dump trucks, and loading work such as earth and sand is performed. Here, if the excavator enters maintenance and is in a resting state, if the alternative vehicle cannot be used, the entire work site cannot be operated, resulting in a significant downtime. In order to avoid such a situation, the “management point” of the construction machine 12 (in this case, the hydraulic excavator) is set in the management state in which the substitute vehicle cannot be prepared, and the construction machine 12 in the management state in which the substitute vehicle can be prepared. Set a lower score than the “management point”.

  In addition, since the environment of the work site 2 and the management state of the construction machines 11 and 12 are fluid, the environmental load points and the management points can be operated by the operation of the construction machine operator or outside the construction machine ( For example, it is desirable to configure so that the point data of the environmental load point and the management point can be rewritten from the administrator via the communication means (step 101). The rewriting by the operator is performed by transmitting a command signal for rewriting the existing data in the storage unit 20b of the recording controller 20 from the display controller 21 when the operator operates an operation button attached to the display device 36. . In addition, rewriting by an external communication means is performed through wireless communication or wired communication using the computer 52 in the monitoring station 50, the personal computer 34 brought into the work site, or the computer 62 in the control office 60. By transmitting new score data to the storage unit 20b of the recording controller 20 of the construction machines 11 and 12, the existing score data can be rewritten.

(Abnormality determination processing; step 102)
In each of the arithmetic processing units 20c of the construction machines 11 and 12, abnormality determination processing is performed. Therefore, the arithmetic processing unit 20c constitutes an abnormality determination unit of the present invention.

The sensor abnormality determination item is determined to be abnormal when the detected value is equal to or greater than (or less than) the threshold value by comparing the detected value of each sensor 40a, 40b... With the corresponding threshold value. Is done. Further, in each controller 22, 23, 24, the detected value of each received sensor is compared with a threshold value in each controller 22, 23, 24 to determine abnormality, and the result is calculated. You may transmit to the process part 20c. In this case, each threshold value is stored in advance in each controller 22, 23, 24.

The error code abnormality determination item is determined to be abnormal when the error code is generated (step 102).

(Cumulative point calculation processing; step 103)
In the arithmetic processing unit 20c of the construction machine 12, each time an abnormality is determined by the construction machine 12, the number of points (points) assigned to the determination item of the corresponding sensor abnormality or error code and the corresponding construction machine 12 Is obtained by multiplying the ratio R1 (or R2 or R3...) Of one abnormality determination item with respect to the total abnormality determination item number set in, and the obtained number P is a cumulative score obtained in the past. By adding to TPo, the current cumulative score TPn is obtained. Similarly, the current cumulative score TPn ′ is also obtained for the construction machine 11. Therefore, the arithmetic processing unit 20c constitutes the cumulative score calculating means of the present invention.

That is, the numerical value P obtained every time it is determined as abnormal is given by the following equation.

P = (elapsed time point) × (part point) × (weight point) × (environmental load point) × (management point) × (ratio R1 (or R2 or R3...)) (9) ′
In the present embodiment, “1 point” is uniformly given to “environmental load point” and “management point” without considering the environmental load and the management state. Therefore, the following formula (9) is used instead of the formula (9) ′.

P = (Elapsed time point) × (Partial point) × (Weight point) × (Ratio R1 (or R2 or R3...)) (9)
The current cumulative score TPn is determined to be abnormal, and is updated from the past cumulative score TPo by the following equation (10) every time the numerical value P is acquired by the above equation (9).

TPn ← TPo + P (10)
Each time maintenance is performed, the cumulative score TPn is reset to zero. This reset is performed by transmitting a reset signal to the storage unit 20b by operating a reset switch (not shown) provided in the driver's seat of each construction machine. Further, the reset signal may be transmitted from the monitoring station 50 or the control office 60, and the transceiver 32 of each construction machine receives the reset signal and is transferred to the storage unit 20b.

(Calculation example of cumulative score P)
Here, regarding the construction machine 12 that is a hydraulic excavator, the present embodiment will be described on the assumption that the following abnormality has occurred when 6000H has passed since the previous maintenance. Suppose that the discharge pressure of the hydraulic oil from the boom cylinder pump decreases, and an abnormality occurs in which the amount of excavation that can be loaded with earth and sand that can be excavated at once by the bucket decreases. It is assumed that the discharge pressure of the boom cylinder pump decreases, and the “boom cylinder pump pressure” detected by the sensor has an abnormally low value. In addition, it is assumed that the output of the fan pump connected to the boom cylinder pump also decreases, and the fan pump pressure is an abnormally low value. Further, it is assumed that the exhaust temperature of each part (NO.1, NO.2, NO.3, NO.4) of the engine is an abnormally high temperature. Assume that the engine oil temperature is abnormally high and the engine water temperature is abnormally high.

  Further, it is assumed that the boom cylinder rising pressure and the boom cylinder lowering pressure are abnormally low values. Furthermore, it is assumed that the boom cylinder pump command current is abnormally increased. It is assumed that the fan pump command current is rising abnormally. Note that the above-described abnormalities do not always occur at the same time, and in this embodiment, it is assumed that abnormalities detected within a predetermined period are handled together. The predetermined period is set in advance, and the abnormality detected (generated) in the predetermined period (for example, every 100 hours) in cooperation with the service meter of the construction machine 12 is described below in the storage controller 20. This process can be executed (steps 103 to 105 shown in FIG. 3). The predetermined period may be set in advance in the arithmetic processing unit 20c of the communication controller 20, but is set or changed by transmitting a setting change signal from the monitoring station 50 or the control office 60 to each construction machine. Is.

On the other hand, regarding the construction machine 11 that is a dump truck, it is assumed that an abnormality as described below occurs when 6000 H has passed since the previous maintenance.

It is assumed that the exhaust temperature of each part (NO.1, NO.2, NO.3, NO.4) of the engine is abnormally high.

Further, it is assumed that the filling time of the second-speed clutch and the trigger time of the second-speed clutch are abnormal values. Further, it is assumed that a phenomenon of double engagement of the shift clutch and slip of the second-speed clutch appear. Similar to the construction machine 12, the above-described abnormalities do not always occur at the same time, and in this embodiment, it is assumed that abnormalities detected (occurred) in a predetermined period are handled together.

First, a case where an abnormality has occurred in the construction machine 12 will be described with reference to FIG.

If it is determined that the sensor abnormality determination item “NO.1 exhaust temperature” is abnormal, the numerical value P is set to P1 from the above equation (9).
P1 = 2 (elapsed time point) × 2 (part point) × 3 (weight point) × (ratio R1) = 1.00
As a result, a numerical value 1.00 is obtained. The numerical value P is calculated by rounding off the third decimal place.

Similarly, if it is determined that there is an abnormality in the sensor abnormality determination item “NO.2 exhaust temperature”, from the above equation (9), if the numerical value P is P2,
P2 = 2 (elapsed time point) × 2 (part point) × 3 (weight point) × (ratio R1) = 1.00
And the numerical value 1.00 is acquired.

Similarly, when it is determined that the sensor abnormality determination item “NO.3 exhaust temperature” is abnormal, according to the above equation (9), when the numerical value P is P3,
P3 = 2 (elapsed time point) × 2 (part point) × 3 (weight point) × (ratio R1) = 1.00
And the numerical value 1.00 is acquired.

Similarly, if the sensor abnormality determination item “NO.4 exhaust temperature” is determined to be abnormal, the numerical value P is set to P4 from the above equation (9).

Then, P4 = 2 (elapsed time point) × 2 (part point) × 3 (weight point) × (ratio R1) = 1.00
And the numerical value 1.00 is acquired.

Further, when it is determined that the sensor abnormality determination item “engine oil temperature” is abnormal, from the above equation (9), if the numerical value P is P5,
P5 = 2 (elapsed time point) × 2 (part point) × 2 (weight point) × (ratio R1) = 0.67
As a result, a numerical value 0.67 is obtained. The numerical value 0.67 is added to the past cumulative score TPo to update the cumulative score TP.

Further, if it is determined that the sensor abnormality determination item “engine water temperature” is abnormal, from the above equation (9), if the numerical value P is P6,
P6 = 2 (elapsed time point) × 2 (part point) × 2 (weight point) × (ratio R1) = 0.67
As a result, a numerical value 0.67 is obtained. The numerical value 0.67 is added to the past cumulative score TPo to update the cumulative score TP.

Also, if it is determined that there is an abnormality in the sensor abnormality determination item “boom cylinder pump pressure”, from the above equation (9), if the numerical value P is P7,
P7 = 2 (elapsed time point) × 3 (partial point) × 3 (weight point) × (ratio R2) = 0.86
As a result, a numerical value 0.86 is obtained. The numerical value 0.86 is added to the past cumulative score TPo to update the cumulative score TP.

Also, if it is determined that the sensor abnormality determination item “fan pump pressure” is abnormal, from the above equation (9), if the numerical value P is P8,
P8 = 2 (elapsed time point) × 3 (partial point) × 2 (weight point) × (ratio R2) = 0.57
As a result, the numerical value 0.57 is obtained. The numerical value 0.57 is added to the past cumulative score TPo to update the cumulative score TP.

Further, if it is determined that there is an abnormality in the sensor abnormality determination item “boom cylinder pump command current”, from the above equation (9), if the numerical value P is P9,
P9 = 2 (elapsed time point) × 3 (part point) × 2 (weight point) × (ratio R2) = 0.57
As a result, the numerical value 0.57 is obtained. The numerical value 0.57 is added to the past cumulative score TPo to update the cumulative score TP.

Further, when it is determined that the sensor abnormality determination item “fan pump command current” is abnormal, from the above equation (9), if the numerical value P is P10,
P10 = 2 (elapsed time point) × 3 (part point) × 2 (weight point) × (ratio R2) = 0.57
As a result, the numerical value 0.57 is obtained. The numerical value 0.57 is added to the past cumulative score TPo to update the cumulative score TP.

Further, if it is determined that there is an abnormality in the sensor abnormality determination item “boom cylinder rising pressure”, according to the above equation (9), if the numerical value P is P11,
P11 = 2 (elapsed time point) × 3 (part point) × 2 (weight point) × (ratio R2) = 0.57
As a result, the numerical value 0.57 is obtained. The numerical value 0.57 is added to the past cumulative score TPo to update the cumulative score TP.

Further, if it is determined that there is an abnormality in the sensor abnormality determination item “Boom cylinder lower pressure drop”, from the above equation (9), if the numerical value P is P12,
P12 = 2 (elapsed time point) × 3 (partial point) × 2 (weight point) × (ratio R2) = 0.57
As a result, the numerical value 0.57 is obtained. The numerical value 0.57 is added to the past cumulative score TPo to update the cumulative score TP.

As described above, regarding the sensor abnormality determination items of the construction machine 12, when the numerical values P1 to P12 are summed, the total value becomes 9.05 points, and according to the above equation (10), the numerical value 9.05 points. Is added to the past cumulative score TPo to update the cumulative score TP.

Further, when the error code abnormality determination item “NO.1 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe1,
Pe1 = 2 (elapsed time point) × 2 (partial point) × 3 (weight point) × (ratio R3) = 0.10
A numerical value 1.00 (= 0.10 × 10) obtained by multiplying the numerical value 0.10 obtained by 10 times is obtained. The acquired numerical value 1.00 is added to the past cumulative score TPo, and the cumulative score TP is updated.

Similarly, when the error code abnormality determination item “NO.2 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe2,
Pe2 = 2 (elapsed time point) × 2 (part point) × 3 (weight point) × (ratio R3) = 0.10
The numerical value 1.00 for 10 times of the numerical value 0.10 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Similarly, when the error code abnormality determination item “NO.3 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe3,
Pe3 = 2 (elapsed time point) × 2 (partial point) × 3 (weight point) × (ratio R3) = 0.10
The numerical value 1.00 for 10 times of the numerical value 0.10 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Similarly, when the error code abnormality determination item “NO.4 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), if the numerical value P is Pe4,
Pe4 = 2 (elapsed time point) × 2 (partial point) × 3 (weight point) × (ratio R3) = 0.10
The numerical value 1.00 for 10 times of the numerical value 0.10 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Further, when the error code abnormality determination item “engine water temperature overheat” is generated 10 times, from the above equation (9), when the numerical value P is Pe5,
Pe5 = 2 (elapsed time point) × 2 (partial point) × 2 (weight point) × (ratio R3) = 0.07
The numerical value 0.70 for 10 times of the numerical value 0.07 obtained by the above is added to the past cumulative score TPo, and the cumulative score TP is updated.

In addition, when the error code abnormality determination item “fan pump pressure is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe6,
Pe6 = 2 (elapsed time point) × 3 (partial point) × 3 (weight point) × (ratio R4) = 0.20
The numerical value 2.00 for 10 times of the numerical value 0.20 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

As described above, regarding the error code abnormality determination items of the construction machine 12, when the numerical values Pe1 to Pe6 are summed, the total value becomes 6.70 points, which is combined with the sensor abnormality determination item total value of 9.05 points. The total is 15.75 points. Therefore, the current cumulative score TPn of the construction machine 12 within a predetermined period from the previous maintenance is 15.75 points.

Next, a case where an abnormality has occurred in the construction machine 11 will be described with reference to FIG.

If it is determined that there is an abnormality in the sensor abnormality determination item “NO.1 exhaust temperature”, from the above equation (9), if the numerical value P is P1 ′,
P1 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R5) = 1.64
Thus, the numerical value 1.64 is obtained. The numerical value P is obtained by rounding off the third decimal place of the calculated value.

Similarly, if it is determined that there is an abnormality in the sensor abnormality determination item “NO.2 exhaust temperature”, from the above equation (9), if the numerical value P is P2 ′,
P2 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R5) = 1.64
And 1.64 are obtained.

Similarly, if it is determined that there is an abnormality in the sensor abnormality determination item “NO.3 exhaust temperature”, from the above equation (9), if the numerical value P is P3 ′,
P3 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R5) = 1.64
And 1.64 are obtained.

Similarly, if the sensor abnormality determination item “NO.4 exhaust temperature” is determined to be abnormal, the numerical value P is set to P4 ′ from the above equation (9).

Then, P4 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R5) = 1.64
And 1.64 are obtained.

Further, if it is determined that there is an abnormality in the sensor abnormality determination item “second-speed clutch filling time”, from the above equation (9), if the numerical value P is P5 ′,
P5 ′ = 2 (elapsed time point) × 3 (part point) × 2 (weight point) × (ratio R6) = 0.75
As a result, a numerical value of 0.75 is obtained. The numerical value 0.75 is added to the past cumulative score TPo to update the cumulative score TP.

Further, if it is determined that there is an abnormality in the sensor abnormality determination item “second-speed clutch trigger time”, from the above equation (9), if the numerical value P is P6 ′,
P6 ′ = 2 (elapsed time point) × 3 (part point) × 2 (weight point) × (ratio R6) = 0.75
As a result, a numerical value of 0.75 is obtained. The numerical value 0.75 is added to the past cumulative score TPo to update the cumulative score TP.

As described above, regarding the sensor abnormality determination items of the construction machine 11, when the numerical values P1 ′ to P6 ′ are summed, the total value becomes 8.06 points, and the total numerical value 8.06 points according to the above equation (10). Is added to the past cumulative score TPo to update the cumulative score TP.

Further, when the error code abnormality determination item “NO.1 exhaust gas temperature is very high” is generated ten times, from the above equation (9), when the numerical value P is Pe1 ′,
Pe1 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R7) = 0.16
The numerical value 1.60 (= 0.16 × 10) obtained by multiplying the numerical value 0.16 obtained by the above by 10 times is acquired. The acquired numerical value 1.60 is added to the past cumulative score TPo, and the cumulative score TP is updated.

Similarly, when the error code abnormality determination item “NO.2 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe2 ′,
Pe2 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R7) = 0.16
The numerical value 1.60 for 10 times of the numerical value 0.16 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Similarly, when the error code abnormality determination item “NO.3 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe3 ′,
Pe3 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R7) = 0.16
The numerical value 1.60 for 10 times of the numerical value 0.16 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Similarly, when the error code abnormality determination item “NO.4 exhaust gas temperature is very high” is generated 10 times, from the above equation (9), when the numerical value P is Pe4 ′,
Pe4 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R7) = 0.16
The numerical value 1.60 for 10 times of the numerical value 0.16 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Also, when the error code abnormality determination item “double engagement of the shift clutch” is generated 10 times, from the above equation (9), if the numerical value P is Pe5 ′,
Pe5 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R8) = 0.17
The numerical value 1.70 for 10 times of the numerical value 0.17 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

Also, when the error code abnormality determination item “slip of the second speed clutch” is generated 10 times, from the above equation (9), if the numerical value P is Pe6 ′,
Pe6 ′ = 2 (elapsed time point) × 3 (part point) × 3 (weight point) × (ratio R8) = 0.17
The numerical value 1.70 for 10 times of the numerical value 0.17 obtained by the above is added to the past cumulative score TPo to update the cumulative score TP.

As described above, regarding the error code abnormality determination items of the construction machine 11, when the numerical values Pe1 ′ to Pe6 ′ are summed, the total value becomes 9.80 points, which is the total value of the sensor abnormality determination items, 8.06 points. The total is 17.86 points. Therefore, the current cumulative score TPn of the construction machine 11 in a predetermined period from the previous maintenance is 17.86 points (step 103).

(Processing to calculate maintenance priority; step 104)
When the current cumulative score TPn is obtained by each construction machine 11, 12 as described above, data indicating the current cumulative score TPn is transmitted / received to / from each other via the inter-vehicle communication transceiver 35. Note that the process of transmitting / receiving data indicating the current cumulative score TPn to / from each other via the inter-vehicle communication transceiver 35 may be executed at predetermined intervals such as once a day or once a week. Alternatively, it may be executed in response to a trigger signal from the monitoring station 50 or a trigger signal from the control office 60.

Therefore, the construction machine 12 receives data indicating the current cumulative score TPn obtained by the other construction machines 11. In addition, the construction machine 13, 14... Similarly performs a process of calculating the current cumulative score TPn, and data indicating the current cumulative score TPn is mutually exchanged between the construction machines including the construction machines 13, 14,. The process of transmitting / receiving data is performed. Therefore, the construction machine 12 receives data indicating the current cumulative score TPn obtained by the other construction machines 11, 13, 14.

The arithmetic processing unit 20c of the construction machine 12 compares the current cumulative score TPn of the construction machine 12 with the current cumulative score TPn of the other construction machines 11, 13, 14,... A process of rearranging TPn is performed. That is, the current cumulative score TPn obtained by each of the plurality of construction machines 11, 12, 13, 14,. The higher maintenance priority is calculated as the current cumulative score TPn increases. Therefore, the arithmetic processing unit 20c constitutes a maintenance priority order calculating means of the present invention.

In the above example, the current cumulative score TPn of the construction machine 12 is 15.75 points, and the current cumulative score TPn of the construction machine 11 is 17.86 points. The construction machine 11 with the higher score TP, that is, the dump truck, is higher than the construction machine 12 with the lower cumulative score TPn, that is, the hydraulic excavator.

When the display device 36 is installed in the cab of the construction machine 12, the maintenance priority order of the plurality of construction machines 11, 12, 13, 14,... Is displayed on the display screen 36a. FIG. 7 is an example in which the maintenance priority order is displayed on the display screen 36a of the display device 36 installed in the cab of the construction machines 11, 12, 13, 14. As shown in FIG. 7, the information related to the maintenance priority order includes the own vehicle column, the model column, the model column, the vehicle case column, the specification column, the maintenance priority column, and the maintenance related part column. It is configured. In addition, in this information, the name of the work site (AAA mine in FIG. 7) is displayed in order to indicate which work site 11, the construction machine 11, 12, 13, 14... ing. Further, the date on which the maintenance priority is calculated is also displayed as the maintenance priority calculation date. The information in the row with a circle in the own vehicle column is information related to the own vehicle. The model column displays the type of construction machine, and may be a name as shown in FIG. 7 or an icon display with the outer shape of each construction machine as a motif. Further, the model column displays the model number of each construction machine. In the column of vehicle grade, a number indicating the size of each construction machine is displayed. The specification column shows the specifications of each construction machine, and displays words such as crushed stone specifications, demolition specifications, standard specifications, and wetland specifications. In the maintenance priority order, the high priority is displayed by characters, symbols, or the like. In the case of FIG. 7, A indicates that maintenance should be performed with the highest priority, and the maintenance priority becomes lower as B, C,. In FIG. 7, the maintenance priority order is expressed in alphabets, but other characters, numerical values, symbols, or color displays may be used. In the maintenance-related part column, a maintenance-related part that has a particularly strong influence on the maintenance priority is obtained and displayed by the recording controller 20, but this maintenance-related part column does not necessarily have to be displayed. By causing the display screen 36a to display information related to such maintenance priority order, the operator of the construction machine 12 grasps the priority of maintenance relative to the other vehicles of the construction machine 12 that he / she operates. Can do. In the example of FIG. 7, the operator of the construction machine 12 (hydraulic excavator) can grasp that the maintenance priority is the second highest among the construction machines operating at this work site (AAA mine). . Similarly, for the other construction machines 11, 13, 14,..., The maintenance priority order of the plurality of construction machines 11, 12, 13, 14... Is displayed on the display screen 36a of the cab display device 36. It is possible to grasp the relative maintenance priority of the construction machine that it operates. That is, since it is possible to grasp the maintenance time of the construction machine operated by itself and the partner vehicle, it is possible to adjust the load applied to the vehicle operated by itself or the load applied to the partner vehicle. For example, assuming that a construction machine 12 that is a hydraulic excavator and a construction machine 11 that is a dump truck are paired to perform earth and sand loading work, as shown in the example of FIG. Maintenance of the construction machine 11, which is a rated X dump truck, is the top priority. However, if the operator wants to continue the work as much as possible, the operator of the construction machine 12 (hydraulic excavator) can load the other dump truck. It is possible to adjust so as to delay the maintenance time of the dump truck while reducing the load and reducing the load to avoid the failure. In this way, it is possible to avoid failure while effectively performing work schedule management.

When the display device 36 is installed in a place that can be seen from the outside of the vehicle body 12a of the construction machine 12, the maintenance priority of the plurality of construction machines 11, 12, 13, 14,... Is displayed on the display screen 36a. Is displayed. FIG. 6 shows an example of displaying the maintenance priority when the display device 36 is installed outside the construction machine. FIG. 6 shows an example in which the construction machine 11 is a dump truck and the construction machine 12 is a hydraulic excavator. As shown in FIG. 6, a display device 36 is provided at the upper front of the dump truck loading platform, and the maintenance priority obtained by the arithmetic processing unit 20 c is transmitted as a signal to the display device 36 to display the letter A. The display device 36 is provided above the cab of the hydraulic excavator, and the maintenance priority obtained by the arithmetic processing unit 20c is transmitted as a signal to the display device 36, and the letter B is displayed. The displayed A and B indicate that A should be preferentially maintained, and the maintenance priority becomes lower as B, C,. In FIG. 6, the maintenance priority order is expressed in alphabets, but other characters, numerical values, symbols, or color displays may be used. Similarly, for the other construction machines 11, 13, 14,..., The maintenance priority order of the plurality of construction machines 11, 12, 13, 14,. Thereby, the manager of the work site 2 outside the construction machines 11, 12, 13, 14... Sees each construction machine operating at the work site 2 at a glance, so that the plurality of construction machines 11, 12, 13 , 14... Can be easily grasped. That is, it is possible to determine which construction machine should be preferentially maintained based on only the maintenance priority order without considering the type of construction machine and the vehicle case. Further, the maintenance priorities displayed on the display screen 36a of the display device 36 can be visually recognized and grasped by the operators of the construction machines 11, 12, 13, and 14. Instead of displaying the maintenance priority order with information such as characters on the display device 36, a light that emits a plurality of colors may be provided outside the construction machine, and the maintenance priority order may be displayed with a difference in color. .

It should be noted that the calculation processing related to the ranking of the maintenance priority order may be performed by each construction machine by collecting data of the current cumulative score TPn of each other construction machine. .., 12, 13, 14..., Only a specific construction machine (for example, construction machine 12) collects data of the current cumulative scores TPn of other construction machines 11, 13, 14. Data of the maintenance priority calculated by the construction machine 12 may be transmitted to the other construction machines 11, 13, 14... Via the inter-vehicle communication transceiver 35.

Data indicating the maintenance priority order of the plurality of construction machines 11, 12, 13, 14... Calculated by the construction machine 12 is wirelessly transmitted from the transceiver 32 of the construction machine 12 to the monitoring station 50. The transmitted data indicating the maintenance priority order of the plurality of construction machines 11, 12, 13, 14... Is received by the transmitting / receiving device 51 of the monitoring station 50 and taken into the computer 52 of the monitoring station 50 (step 104).

(Perform maintenance; Step 105)
Data indicating the priority of maintenance of the plurality of construction machines 11, 12, 13, 14... Taken into the computer 52 of the monitoring station 50 is processed by the computer 52 and displayed on a display screen 52 a of the computer 52, for example. The display may be a list display of the identification number of each construction machine and the priority of maintenance, or each construction machine may be displayed as a symbol, and the priority of maintenance may be displayed next to the symbol. The priority of maintenance may be expressed by numerical values or symbols or characters as long as the order of maintenance can be visually recognized. Further, the identification number of the construction machine with the highest maintenance priority is output by voice from a speaker attached to the computer 52, so that the users of the construction machines 11, 12, 13, 14. You may inform the administrator. As a result, the user or manager of the construction machines 11, 12, 13, 14 ... in the monitoring station 50 sets the priority of maintenance of the construction machines 11, 12, 13, 14 ... operating in the work site 2. I can grasp it. Further, a maintenance plan can be formulated based on the priority of maintenance of each construction machine 11, 12, 13, 14,. For this reason, the user or the administrator can instruct maintenance of each construction machine 11, 12, 13, 14,... At an appropriate time indicated in the maintenance plan. Each construction machine 11, 12, 13, 14... Is maintained at an appropriate time according to the maintenance priority according to the current cumulative score TPn, and downtime is avoided while avoiding a serious failure. This can be drastically reduced (step 105). In other words, it is possible to increase the operation efficiency of a plurality of types of construction machines that operate on the work site 2.

As described above, according to the first embodiment, the states of different types of construction machines 11, 12,... Can be compared based on the same standard. It becomes possible to judge that maintenance should be given priority over types of construction machinery. Moreover, even if the person who develops the maintenance plan has little experience, it can easily determine which construction machine should be preferentially maintained (formation of the maintenance plan).

  That is, if the types are different from each other as in the construction machines 11 and 12, the number of abnormality determination items to be determined is different. However, it can be said that an abnormality is likely to occur if the type of construction machine has a large number of abnormality determination items, and an abnormality hardly occurs if the type of construction machine has a small number of abnormality determination items. Therefore, construction machines with a larger number of abnormality judgment items are less important for each abnormality, and the maintenance priority needs to be estimated lower. In addition, it is necessary to estimate the priority of maintenance higher for a construction machine having a greater number of abnormalities.

Therefore, in the first embodiment, the concept of “the ratio of one abnormality determination item to the total abnormality determination item number” (R1, R2,...) Is introduced, and points (part points, weights) are determined for each abnormality determination item. Points, elapsed time points, etc.), and when it is determined to be abnormal, a numerical value P obtained by multiplying the point of the abnormal determination item by the above-mentioned “ratio” is obtained, and a cumulative score TP of the numerical value is obtained, The priority order of maintenance is determined according to the order of the cumulative score TP. In this way, it becomes possible to accurately determine the priority order of maintenance among the construction machines 11, 12... Including different types. Therefore, for example, even when the number of occurrences of abnormality is the same, a construction machine with a smaller number of abnormality determination items has a higher maintenance priority. On the contrary, even if the number of occurrences of abnormality is larger than that of other types of construction machines, the priority of maintenance may be lower than that of other construction machines if the number of determination items for all abnormalities is small.

In the first embodiment, points (part points, weight points, elapsed time points, etc.) are assigned to each abnormality determination item, but it is also possible to set the points uniformly without defining the points. That is, for each type of construction machine, a plurality of abnormality judgment items to be judged are set, and the ratio of the number of occurrences of abnormality to the number of all abnormality judgment items set in the construction machine is determined between each construction machine. In contrast, it is also possible to perform construction machine maintenance with a higher priority for construction machines with a higher ratio.

(Second embodiment)
In the first embodiment, the calculation of the maintenance priority order is performed inside the construction machines 11, 12,... And the data indicating the maintenance priority order is sent to the outside. It is also possible to perform the calculation up to the inside of the construction machines 11, 12,... And send the data indicating the current cumulative score TPn to the outside to determine the maintenance priority order outside. Note that the description of the present embodiment will be omitted while omitting the description in common with the first embodiment.

  In the second embodiment, the processing from step 101 to step 103 is performed in the same manner as in the first embodiment, and the construction machine 12 obtains the current cumulative score TPn of its own construction machine 12. When the display device 36 is installed in the cab of the construction machine 12, the current cumulative score TPn of the construction machine 12 is displayed on the display screen 36a. Thereby, the operator of the construction machine 12 can grasp the current cumulative score TPn of the construction machine 12 that he / she operates. The same processing is performed on the other construction machines 11, 13, 14..., And the maintenance priority order of the own construction machines 11, 13, 14... Is displayed on the display screen 36a of the display device 36 in the cab. Therefore, the current cumulative score TPn of the construction machine that is operated by itself can be grasped.

When the display device 36 is installed in a place that can be seen from the outside of the vehicle body 12a of the construction machine 12, the current cumulative score TPn of the construction machine 12 is displayed on the display screen 36a. Similarly, for the other construction machines 11, 13, 14..., The current cumulative score TPn of their own construction machine is displayed on the display screen 36a outside the vehicle body. As a result, the operator of a certain construction machine can display the current cumulative score TPn of his / her construction machine displayed on the display screen 36a of the operator's cab and the other construction machine displayed on the display screen 36a outside the vehicle body of the other construction machine. It is possible to compare the current cumulative score TPn of the machine, and to grasp the relative priority of maintenance. Further, the manager of the work site 2 outside the construction machines 11, 12, 13, 14... Finds the current cumulative score TPn of each of the construction machines 11, 12, 13, 14. At a glance, it is possible to easily grasp the maintenance priorities of the plurality of construction machines 11, 12, 13, 14.

Data indicating the current cumulative score TPn of the construction machine 12 calculated by the construction machine 12 is transmitted from the transceiver 32 of the construction machine 12 to the monitoring station 50. The transmitted data indicating the current cumulative score TPn of the construction machine 12 is received by the transmitting / receiving device 51 of the monitoring station 50 and taken into the computer 52 of the monitoring station 50. Similarly, data indicating the current cumulative score TPn of each construction machine is sent from the other construction machines 11, 13, and 14 to the monitoring station 50 and taken into the computer 52 of the monitoring station 50.

Data indicating the current cumulative score TPn of each construction machine 11, 12, 13, 14... Taken into the computer 52 of the monitoring station 50 is subjected to data processing by executing a program stored in advance in the computer 52. The same processing as step 104 described above is performed, and the maintenance priority order of the plurality of construction machines 11, 12, 13, 14. Further, in the same manner as in step 105, a maintenance plan is formulated, and maintenance is performed according to the maintenance priority. The program stored in the computer 52 performs the process of step 104, and executes the process of displaying the priority of each construction machine on the display device 52a of the computer using numbers and symbols. An example of information displayed on the display device 52a of this computer is shown in FIG. The maintenance priority data is transmitted from the monitoring station 50 to each construction machine 11, 12, 13, 14 and displayed on the display screen 36a of the display device 36 of each construction machine 11, 12, 13, 14. The operator may be informed of the maintenance priority.

(Third embodiment)
In the first embodiment, the case where the calculation of the maintenance priority order is performed inside the construction machines 11, 12,... And the data indicating the maintenance priority order is sent to the outside has been described as an example, but the construction machines 11, 12,. It is also possible to send out the sensor detection value and error code data obtained in each case, and perform the sensor detection value abnormality determination process, the cumulative point TP calculation process, and the maintenance priority calculation process. It is. Note that the description of the present embodiment will be omitted with respect to the points common to the first embodiment and the second embodiment.

In this case, the storage process shown in step 101, that is, the process of setting an abnormality determination item for each construction machine and assigning a score to each abnormality determination item and storing it in advance is the computer 52 of the external monitoring station 50. Is stored in advance in the storage means of the computer 52.

The sensor detection value and the error code data of the construction machine 12 are transmitted from the transceiver 32 of the construction machine 12 to the monitoring station 50. The sensor detection value and the error code data may be transmitted to the monitoring station 50 at regular intervals such as once a week, or at any time if an abnormal value is detected or an error code is generated. The transmitted sensor detection value and error code data of the construction machine 12 are received by the transmitting / receiving device 51 of the monitoring station 50 and taken into the computer 52 of the monitoring station 50. Similarly, sensor detection values and error code data of its own construction machine are sent from each of the other construction machines 11, 13, and 14 to the monitoring station 50 and taken into the computer 52 of the monitoring station 50.

When the computer 52 of the monitoring station 50 captures the sensor detection value and the error code data of the construction machine 12, it performs an abnormality determination on the abnormality determination items set for the construction machine 12. That is, the sensor detection value sent from the construction machine 12 is compared with the corresponding threshold value, and when the detection value is equal to or greater than (or less than) the threshold value, it is determined that there is an abnormality. When an error code is sent from the construction machine 12, it is determined that there is an abnormality at that time. Similarly, the other construction machines 11, 13, 14... Perform abnormality determination on the abnormality determination items set for the respective construction machines 11, 13, 14. Thereafter, as in step 103, the numerical value P is calculated every time it is determined that there is an abnormality, and the current cumulative score TPn is calculated for each construction machine 11, 12, 13, 14,... The maintenance priorities of the plurality of construction machines 11, 12, 13, 14... Are calculated, and maintenance is performed according to the maintenance priorities in the same manner as step 105. An example of information displayed on the display screen 52a of this computer is shown in FIG. The maintenance priority data is transmitted from the monitoring station 50 to each construction machine 11, 12, 13, 14 and displayed on the display screen 36a of the display device 36 of each construction machine 11, 12, 13, 14. The operator may be informed of the maintenance priority.

(Fourth embodiment)
In the first embodiment, the second embodiment, and the third embodiment, the case where data is sent from the construction machines 11, 12,... To the external monitoring station 50 according to the pattern 1 has been described as an example. However, it is also possible to send sensor detection values and error code data from the construction machines 11, 12... To the external control office 60 according to the pattern 2. The description of the present embodiment will be omitted while omitting the description of the points common to the first to third embodiments.

The sensor detection values and error code data transmitted from the transceiver 32 of the construction machine 11, 12, 13, 14... To the control office 60 are received by the transmission / reception device 61 of the control office 60 and The data is captured by the computer 62 and stored in the database 63, and data processing is performed by the computer 62. The computer 62 of the control office 60 is operated by, for example, a manager of a factory that maintains the construction machines 11, 12, 13, 14,. On the display screen 62a of the computer 62, the maintenance priorities of the plurality of construction machines 11, 12, 13, 14... Are displayed. An example of information displayed on the display screen 62a of this computer is shown in FIG. As a result, the manager of the factory that maintains the construction machines 11, 12, 13, 14,... Can grasp the priority of maintenance of each construction machine 11, 12, 13, 14,. It is possible to develop a maintenance plan and maintain each construction machine 11, 12, 13, 14... At an appropriate time according to the maintenance priority. Note that the database 63 can store not only the work site 2 but also data of construction machines operating in an area where the communication infrastructure such as the communication satellite 37 functions effectively. Therefore, it becomes possible to determine the maintenance priority of not only the work site 2 but also a plurality of construction machines operating within a wider range and appropriately perform maintenance.

(5th Example)
In the first embodiment, the second embodiment, and the third embodiment, a case where sensor detection values and error code data are sent to the external monitoring station 50 from the construction machines 11, 12,. did. However, it is also possible to download sensor detection values and error code data from the construction machines 11, 12... According to the pattern 3 to the external personal computer 34 via the dedicated tool 33 described above. Note that the description of the present embodiment will be omitted with respect to the points common to the first to fourth embodiments.

Sensor detection values and error code data inside the construction machine 12 (storage unit 20b) are downloaded from the construction machine 12 to the external personal computer 34 via the dedicated tool 33, and taken into the personal computer 34. Further, the sensor detection values and error code data in the other construction machines 11, 13, 14... (Storage unit 20b) are downloaded in the same manner and taken into the personal computer 34. The personal computer 34 performs data processing from step 102 to step 104, and the display screen 34a of the personal computer 34 displays the priority order of maintenance of the plurality of construction machines 11, 12, 13, 14. An example of information displayed on the display screen 34a of the computer is the same as that described in the example in which the maintenance priority is displayed on the display device installed in the cab of the construction machine 11, 12, 13, 14. Is. As a result, the service person inspecting the construction machines 11, 12, 13, 14... Can grasp the priority of maintenance of the construction machines 11, 12, 13, 14. A maintenance plan is formulated, and each construction machine 11, 12, 13, 14... Can be maintained at an appropriate time according to the maintenance priority. The sensor detection values and error code data captured by the personal computer 34 are further sent to the computer 62 of the control office 60 via the Internet 38 and the like, and stored in the database 63. At the control office 60, steps 102 to 104 are performed. It is possible to perform the data processing up to.

  DESCRIPTION OF SYMBOLS 1 Maintenance system of construction machine 2 Work site 11, 12, 13, 14 Construction machine 20b Storage part 20c Arithmetic processing part

Claims (7)

A method for maintaining a plurality of construction machines including different types,
For each type of construction machine, set a plurality of abnormality judgment items to be judged,
Compare the ratio of the number of occurrences of abnormalities to the number of judgment items for all abnormalities set for each type of construction machine.
The maintenance priority that is higher for construction machines having a higher ratio is displayed on a display device provided for each construction machine or a display device that can be wired or wirelessly communicated with each construction machine, and the construction machine is maintained. How to maintain construction machinery. 2. The construction machine maintenance method according to claim 1, wherein the priority order is displayed on a display device provided in a cab of each construction machine or a display device provided outside the construction machine. A method for maintaining a plurality of construction machines including different types,
For each type of construction machine, set a plurality of abnormality judgment items to be judged, and assign a score to each abnormality judgment item,
Each time an abnormality is determined, the number of points assigned to the corresponding abnormality determination item is multiplied by the ratio of one abnormality determination item to the total number of abnormality determination items set for the corresponding construction machine. Obtain a numerical value, add the obtained numerical value to the numerical value obtained in the past, and the obtained numerical value is the current cumulative score of the construction machine,
A maintenance method for a construction machine, wherein the current cumulative score obtained for each of a plurality of construction machines is ranked, and the construction machine is maintained with a maintenance priority according to the current cumulative score ranking. A maintenance system for maintaining a plurality of construction machines including different types,
For each type of construction machine, a plurality of abnormality determination items to be determined are set, a score is assigned in advance for each abnormality determination item, and storage means for storing these data,
A plurality of detection means for detecting the internal state of the construction machine;
An abnormality determining means which is provided outside the construction machine or the construction machine and determines an abnormality according to the detection result of the detecting means;
Each time it is determined as abnormal by the abnormality determination means, the number of points assigned to the corresponding abnormality determination item and the ratio of one abnormality item to the total abnormality determination item number set for the corresponding construction machine A cumulative number calculating means for obtaining a numerical value obtained by multiplying, adding the obtained numerical value to a numerical value obtained in the past, and using the obtained numerical value as a current cumulative score of the construction machine;
A ranking of the current cumulative points obtained for each of a plurality of construction machines, and a maintenance priority calculating means for obtaining a maintenance priority according to the current cumulative score ranking, with the determined maintenance priority, A construction machine maintenance system characterized by maintaining construction machines. A first display device provided in each construction machine;
A second display device capable of wired or wireless communication with each construction machine,
5. The maintenance system for a construction machine according to claim 4, wherein the obtained maintenance priority order is displayed on the first display device and / or the second display device. For each construction machine,
A communication means capable of wireless communication between construction machines;
The cumulative score calculating means,
In each construction machine or a specific construction machine among the construction machines,
The maintenance priority order calculating means is provided,
The current cumulative score is acquired by each construction machine or a specific construction machine via the communication means,
The maintenance priority order is obtained by the maintenance priority order calculating means of each construction machine, or the maintenance priority order is obtained by the maintenance priority order calculating means of the specific construction machine, and each construction machine is connected via the communication means. By acquiring the maintenance priority in
6. The construction machine maintenance system according to claim 5, wherein the maintenance priority order is displayed on a display device provided in each construction machine. The number of points assigned to each abnormality judgment item is
The site point corresponding to the site of each construction machine,
Weight points assigned to the detection means associated with the site;
The construction machine maintenance system according to claim 4, comprising weight points assigned to error codes generated in accordance with detection results of the detection means.

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