JPH06306891A - Maintenance monitoring device for construction machinery - Google Patents

Abstract

PURPOSE:To compensate a target maintenance time at each constituent components of construction machinery according to operation details by inputting these details and judging the relative weight of the operation concerned. CONSTITUTION:This maintenance monitor consists of a timer 2 measuring the operating time of an engine, a random access memory 3 storing a target maintenance time or the like conformed to operation details, a central processing unit 4 calculating the target maintenance time conformed to the operation details, a read-only memory 5 in which a program of operational contents, etc., by this central processing unit 4 and a span of maintenance time or the like at each constituent component, a display 6 displaying the result operated by the CPU 4, a keyboard 8 indicating an object to be displayed to the display 6, and a moment limiter 10. The central processing unit 4 compensates the target maintenance time on the basis of a maintenance interval stored in the ROM 5 and the operation details out of the maintenance limiter 10, and using the result, it judges the maintenance time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention selectively performs a standard work such as a crawler crane, which has a small load such as a lifting work with a hook, and a heavy work such as an excavation work with a bucket, which has a large load. A maintenance monitor device for a construction machine capable of managing the maintenance time of each part of the construction machine by correcting the operating time according to the work content of the standard work or heavy work for the construction machine that can be performed. It is about.

[0002]

2. Description of the Related Art As a maintenance monitor device of this type for construction machines, there is a device disclosed in Japanese Patent Laid-Open No. 17321/1991. This maintenance monitor device detects the temperature of each part, the number of revolutions, the vehicle speed, and the like, and corrects the operating time of the engine based on the detected state quantities. However, since this type of conventional maintenance monitor device must be equipped with a detector that detects the state quantity for each part requiring maintenance, it requires a great deal of cost and time, including its design and installation. And

Therefore, the present applicant has filed Japanese Patent Application No. 4-26757.
No. 6 specification proposes a maintenance monitor device that automatically determines the lightness or weight of the work based on the work contents input in advance without providing a detector and calculates the operating time according to the usage state. In the above application, for each of the maintenance items whose maintenance intervals differ depending on the lightness of the work, a new ratio is calculated by multiplying the ratio of the maintenance interval of this work and the maintenance interval of the previous work and the operating time of each maintenance item. Calculate uptime. Next, each time the timer that measures the operating time of the construction machine measures the unit time, the unit time is added to the operating time, and if the operating time exceeds the maintenance interval, it is determined that the maintenance time has passed.

[0004]

However, in the maintenance monitor device of the above application, it is always detected whether or not the timer measures the unit time, and the operating time of each maintenance item is updated every time the unit time is measured. Since this must be done, the processing load of the maintenance monitor device is heavy. In addition, it is necessary to judge whether the operating time exceeds the maintenance interval for all maintenance items during the unit time. For example, if the number of maintenance items is large, the processing will end during the unit time. May not.

An object of the present invention is to correct the target maintenance time for each component according to the work content input in advance, and compare the target maintenance time with the operating time measured by the measuring means. Therefore, it is an object of the present invention to provide a maintenance monitor device for a construction machine, which can notify an operator of a maintenance time according to actual conditions.

[0006]

The present invention will be described with reference to FIG. 1 showing an embodiment. The present invention is carried out by a measuring means 2 for measuring the time during which a construction machine is operating, and the construction machine. Instructing means 10 for instructing at least two types of work contents, at least two maintenance intervals set in advance for each component of the construction machine and corresponding to at least two types of work contents, and the time at which the next maintenance should be performed. Based on the storage unit 3 that stores the target maintenance time shown, and the respective maintenance intervals and the target maintenance time stored in the storage unit 3, each target maintenance time is converted into a value according to the work content of this time. The above-mentioned object is achieved by constituting with the calculating means 4. According to a second aspect of the present invention, in the maintenance device for a construction machine according to the first aspect, a maintenance warning is output when the time measured by the measuring means 2 exceeds the target maintenance time calculated by the calculating means 4. Thus, the output means 6 is configured.

[0007]

The operation means 4 reads each maintenance interval and each target maintenance time from the storage means 3 according to the work content instructed by the instructing means 10, and measures these values and the operating time of the construction machine. By
The calculation means 4 converts each target maintenance time into a value according to the contents of this work.

Incidentally, in the section of means and action for solving the above-mentioned problems for explaining the constitution of the present invention, the drawings of the embodiments are used to make the present invention easy to understand. It is not limited to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which a maintenance monitor device for a construction machine according to the present invention is applied to a mobile crane will be described with reference to FIG. In FIG. 1, reference numeral 1 is a maintenance monitor device according to the present invention. The maintenance monitor device 1
A timer 2 that measures the operating time that represents the cumulative time that the crane vehicle is operating, a RAM 3 that stores this operating time and the target maintenance time of each maintenance item, etc. The CPU 4 that corrects the target maintenance time to the target maintenance time according to the work content based on the content and the operation time from the timer 2, the program such as the calculation content by the CPU 4 and the maintenance interval for each work content are stored. A read-only ROM 5 for reading and writing, an input / output device 7 for outputting a result calculated by the CPU 4 to the display 6, and a keyboard 8 for selecting and instructing an object to be displayed on the display 6.

Further, the maintenance monitor device 1 is connected to a known moment limiter 10 which is permanently installed in a mobile crane. The moment limiter 10 includes a keyboard 11 for inputting various conditions for work to be performed,
A display 12 for displaying the input, and a RAM 13 for storing various conditions input from the keyboard 11.
ROM 14 for storing crane front data, load data, etc. of the mobile crane, RAM 13 and ROM 1
CPU 15 for calculating the relationship between the hoisting load of the mobile crane and the tipping limit angle based on the data stored in 4.
And a ROM 16 in which programs and the like executed by the CPU 15 are stored. Moment limiter 10
The maintenance monitor device 1 and the maintenance monitor device 1 are connected to each other by input / output devices 17 and 7, respectively, and information such as work contents input from the keyboard 11 of the moment limiter 10 is input / output devices 17 and 7. It is sent to the maintenance monitor device 1.

In the embodiment constructed as described above, the contents of work to be performed from the keyboard 11 provided in the moment limiter 10, for example, the type of hanging equipment such as the lifting work by the hook and the excavating work by the bucket, the hook or the bucket. The load of is input. Here, the type of suspending tool is used to determine the lightness of the work, and it is determined that the load work using the hook has a lighter load than the work using the bucket. Data on the type of hanging equipment,
The data is output to the maintenance monitor device 1 via the input / output devices 17 and 7, and the maintenance monitor device 1 stores the data regarding the type of the hanging tool in the RAM 3. Further, the CPU 4 performs arithmetic processing according to an arithmetic program stored in the ROM 5 in advance.

The arithmetic processing by the maintenance monitor device 1 of this embodiment will be described below with reference to the flow chart shown in FIG. FIG. 2 shows a procedure of preprocessing for converting the target maintenance time calculated according to the previous work content into the target maintenance time according to the current work content.
In FIG. 2, the maintenance interval (k) means a maintenance time interval for the kth maintenance item requiring maintenance, and the target maintenance time (k) means a maintenance interval (k) for the kth maintenance item. ), The total operating time of the construction machine before the next maintenance. In FIG. 2, the difference in the work content is determined by the type of the hanger, that is, whether the hanger is a hook or a bucket, and the load work by the hook is a standard work and the excavation work by the bucket is a heavy work. The maintenance interval for standard work and the maintenance interval for heavy work are shown in ROM5 for each maintenance item.
It is written in.

In step S101, the data relating to the lifting tool input from the keyboard 11 of the moment limiter 10 and stored in the RAM 3 is read. Next, in step S102, it is determined whether or not the hanging device is a hook, and if it is a hook, the process proceeds to step S103, and if not, the process proceeds to step S104. In the case of excavation work using a bucket, the load dynamically changes and an excessive load is applied to each part of the crane. Therefore, inspection and maintenance of each part of the crane must be performed at intervals shorter than the load work using the hook. Therefore, in step S103, if the suspending tool is a hook, the current work content to be performed from now on is a standard work, and if the suspending tool is not a hook, the current work content is a heavy work in step S104.

In step S105, the work contents of the previous work stored in the RAM 3 are read, and step S105
At 106, it is determined whether the work content of the previous work is equal to the work content of this time. If the two work contents are the same, the target maintenance times are the same, so this preprocessing ends. That is, the preprocessing is ended without changing the value of the target maintenance time. On the contrary, if they are not equal, the process proceeds to step S107, the total operation time is read from the timer 2, the process proceeds to step S108, and 1 is set to the variable k. If the number of maintenance items whose maintenance time differs depending on the work content is J, steps S109 to S114 are repeated until k = J.

In step S109, the target maintenance time (k) of the previous work content is read from the RAM 3 for the k-th maintenance item whose maintenance interval differs depending on the work content, and the process proceeds to step S110. In step S110, the maintenance interval 1 (k) in the previous work content and the maintenance interval 2 (k) in the current work content are read from the ROM 5, respectively, and the process proceeds to step S111. In step S111, the target maintenance time is calculated.
That is, the result obtained by subtracting the total operation time of the construction machine measured by the timer 2 from the previously calculated target maintenance time (k), the maintenance interval 1 (k) in the previous work content read in step S110, and the current time The target maintenance time (k) in the current work content is converted by multiplying the ratio with the maintenance interval 2 (k) in the work content and adding the total operation time of the timer 2 to the result. For example, the total operation time of the timer 2 is 50 hours, the target maintenance time (k) calculated last time is 100 hours,
If the last maintenance interval 1 (k) is 10 hours and the current maintenance interval 2 (k) is 5 hours, step S
The calculation result of 111 is 75 hours.

In step S112, step S111
The target maintenance time (k) calculated by
3 and the process proceeds to step S113. Step S11
In 3, it is determined whether or not the variable k is J, that is, whether or not the processing from step S109 to step S114 has been performed for all maintenance items whose maintenance intervals differ depending on the work content, and the processing is completed for all maintenance items. For example, the process proceeds to step S115, the work content of this time is stored in the RAM 3, and a series of preprocessing is ended.

Through the above pre-processing, the target maintenance time for each maintenance item is corrected according to the size of the maintenance interval of the work content. Therefore, if the maintenance interval of this work content is longer than the previous maintenance interval, the target maintenance time is corrected to a value that is longer than the previous calculation time, while if the maintenance interval of this work content is smaller than the previous maintenance interval, The target maintenance time is corrected to a small value.

FIG. 3 is a flow chart for comparing the target maintenance time obtained by the above-mentioned preprocessing with the total operation time of the timer 2 to judge whether or not the maintenance execution time has passed. In step S201, the total operating time measured by the timer 2 is read in
In step 202, the variable i is set to 1, and steps S203 to S209 are repeated until all the maintenance item numbers L, that is, i = L. In step S203, the target maintenance time (i) of the maintenance item (i) assigned i-th (1 ≦ i ≦ L) is read from the RAM 3, and the process proceeds to step S204. In step S204, it is determined whether or not the total operation time of the timer 2 read in step S201 exceeds the target maintenance time (i) of the i-th maintenance item (i). If it exceeds, the process proceeds to step S205, the maintenance execution warning flag Wi of the i-th maintenance item (i) is set to 1, and the process proceeds to step S206.

On the other hand, if the target maintenance time (i) is not exceeded in step S204, the process proceeds to step S207, the maintenance execution warning flag Wi is set to 0, and the process proceeds to step S206. In step S206, the maintenance execution warning flag Wi is stored in the RAM 3, and the process proceeds to step S208. In step S208, it is determined whether i is L, that is, whether the maintenance execution warning flag Wi has been set for L maintenance items.
If i has not reached L yet, the process proceeds to step S209, i is incremented by 1, and the process returns to step S203. When i becomes L, the process proceeds to step S210, and the maintenance item in which 1 of the maintenance execution warning flag Wi (i = 1 to L) is set is displayed on the display unit 6 and the process is ended.

By the processing of FIG. 3, it is possible to judge whether or not the maintenance time has passed by simply comparing the target maintenance time calculated in the preprocessing with the total operation time measured by the timer 2. Further, since the flag Wi indicating whether or not the maintenance time has passed is provided for each maintenance item, the CPU 4 can easily determine whether or not the maintenance time has passed for all of the maintenance items and display it easily. You can

FIG. 4 is a flowchart showing a processing procedure for resetting the operation time when maintenance is performed. In step S501, 1 to be reset
Display all L maintenance items. Step S
In 502, maintenance item numbers 1 to L to be reset
Is waited for, and if there is an input, the item number is entered in the variable m and the process proceeds to step S503. In step S503, confirmation of whether or not to reset is displayed, and the flow advances to step S504. If "YES" is not input from the keyboard 8 in step S504, step S50
5, the process ends if "NO" is input, and the process returns to step S504 if any other key is pressed. When “YES” is input in step S504, the process proceeds to step S506, the total operation time is read from the timer 2, and the process proceeds to step S507. In step S507, the maintenance interval for the current work content is read from the ROM 5, and the process proceeds to step S508. Step S508
Then, the result obtained by adding the maintenance interval (m) for the current work content to the total operation time of the timer 2 is set as the target maintenance time (m). In step S509, the result is stored in the RAM 3 and the process is ended.

By thus initializing the target maintenance time according to the process of FIG. 4 after performing the maintenance, it is possible to continuously determine whether or not the maintenance time has passed. Further, since the target maintenance time can be initialized for each maintenance item, it is not necessary to affect the determination of the maintenance time of other maintenance items at the time of initialization.

The operation of this embodiment is summarized as follows. From the moment limiter 10 to the input / output device 1
The CPU 4 of the maintenance monitor device 1 determines the weight of the work to be performed according to the type of the work content input through 7, 7. Next, the CPU 4 performs the above-mentioned processing according to the processing program stored in the ROM 5 based on the target maintenance time until the previous work, the maintenance interval 1 for the previous work, and the maintenance interval 2 for the current work stored in the RAM 3. The calculated maintenance process is executed to calculate the target maintenance time according to the work content of the mobile crane. Further, the CPU 4 compares the calculated target maintenance time with the total operation time of the timer 2 to determine whether the maintenance time has passed. When it is determined that the maintenance time has passed, the CPU 4 displays a message to that effect on the display. This allows the crane operator to know that maintenance is required. In addition, since the target maintenance time can be initialized for each maintenance item when maintenance is performed, it is possible to continuously determine a new maintenance time without affecting other maintenance items.

In the above embodiment, the maintenance interval is set for each of standard work and heavy work, but the present invention is not limited to such work of a crane vehicle, and it is necessary to set different maintenance intervals. The present invention can be applied to all types of construction machines that perform a certain plurality of works, and can also be applied to one that sets a maintenance interval of 3 or more according to the work contents for a certain part.

In the embodiment thus constructed, the timer 2 serves as the measuring means, the moment limiter 10 serves as the indicating means, the RAM 3 serves as the storing means, and the CPU 4 serves as the computing means.
The display 8 corresponds to the output means.

[0026]

As described above in detail, according to the present invention, the calculating means automatically determines the lightness or weight of the work to be performed according to the work content input from the instructing means, and based on this, the target maintenance is performed. Since the time is converted into a value corresponding to the work content, the target maintenance time can be converted into a value that matches the actual situation. Also,
By comparing the calculated target maintenance time with the working time measured by the measuring means, it is determined whether or not the maintenance time has passed, so that the processing of the calculating means is reduced compared to the conventional case, and the processing is performed. The speed can be improved. Furthermore, since the calculation means does not need to repeat the process for each unit time of the working time measured by the measurement means, it can be applied to a construction machine having a large number of component parts requiring maintenance. Furthermore, since the operator is warned that the maintenance time has passed according to the calculation result in the calculation means, the operator can easily know that the maintenance must be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a maintenance device for a construction machine according to the present invention.

FIG. 2 is a flowchart showing a processing procedure of preprocessing in the embodiment of the present invention.

FIG. 3 is a flowchart showing a procedure for determining whether or not the maintenance time has passed in the embodiment of the present invention.

FIG. 4 is a flowchart showing a procedure for resetting a target maintenance time according to the embodiment of the present invention.

[Explanation of symbols]

 1 Maintenance Monitor Device 2 Timer 3 RAM 4 CPU 5 ROM 6 Display 7 Input / Output Device 8 Keyboard 10 Moment Limiter

Claims (2)

[Claims] 1. A measuring means for measuring the time during which the construction machine is operating, an instruction means for instructing at least two types of work performed on the construction machine, each of the constituent parts of the construction machine, and the at least the At least two maintenance intervals set in advance corresponding to the two types of work and storage means for storing a target maintenance time indicating a time at which the next maintenance should be performed, respectively, and each maintenance interval stored in the storage means, A maintenance monitor device for a construction machine, comprising: a calculation means for converting each of the target maintenance times into a value corresponding to the current work content based on each of the target maintenance times. 2. The maintenance monitor device according to claim 1, further comprising output means for outputting a maintenance warning when the time measured by the measuring means exceeds the target maintenance time calculated by the calculating means. Maintenance monitoring device for construction machinery.