JP2022095136A - Crane failure diagnosis system - Google Patents

Abstract

To provide a crane failure diagnosis system capable of supporting field inspection without providing an AI function and the like and without requiring high technical skill and experience.SOLUTION: A failure diagnosis device of a crane includes: analysis means 32, 33 analyzing a failure factor from failure state information and operation state information about a crane device; support information acquisition means 32, 33 acquiring at least support information about a confirmation item or a replacement component required for coping with the failure from the analyzed failure factor; and display means 25 displaying the acquired support information.SELECTED DRAWING: Figure 4

Description

The present invention relates to a crane failure diagnosis system for diagnosing a failure of a crane device.

Periodic inspection of the crane equipment is required by law, but in recent crane equipment, when an abnormality or failure of the crane equipment (hereinafter collectively referred to as a failure) is detected, the content of the failure detection is provided in the crane device. It is displayed as an error code on the display of the control unit.

Then, the operator of the crane device informs the maintenance company or the crane maker of the displayed error code, and the maintenance staff such as the maintenance company who receives the contact analyzes the cause of the failure detection by reading the error content from the error code. And, if necessary, prepare replacement parts for restoring the crane equipment.

However, in order to analyze the factors of failure detection, the maintenance staff will conduct an interview survey on how to use the crane equipment from the worker, and in some cases, go to the site where the crane equipment is installed and actually use the crane equipment. It was necessary to conduct an investigation, and it sometimes took a lot of time to restore the crane equipment. As a countermeasure against such a background, for example, Japanese Patent Application Laid-Open No. 06-127886 (Patent Document 1) makes the following proposals.

In Patent Document 1, in a crane group having a plurality of crane devices, failure state information indicating the failure state of the crane device is transmitted from a terminal device installed in the crane device at the time of failure of each crane device together with identification information of the crane device. , The communication line is used to send to the computer at the control base, and the computer at the control base stores this failure status information and sends the failure diagnosis result analyzed based on the failure status information of the crane device to the communication line. It is proposed to use it and send it to the terminal device of the crane device.

According to this, by transmitting the failure status information of the crane device to the computer of the control base using the communication line, if a failure occurs in the crane device, the control base can provide accurate failure status information in a short time. Since it can be obtained, it is possible to make a quick and accurate failure diagnosis, which enables appropriate judgment and response, and shortens the time required for recovery.

Japanese Unexamined Patent Publication No. 06-127886

By the way, in order to perform more rapid and accurate failure diagnosis, it is conceivable to use the AI (Artificial Intelligence) function. However, such an approach requires machine learning with various patterns, and this machine learning cannot be easily performed. In addition, when a specialist diagnoses a failure, it is necessary to make a judgment from various information obtained, so high technical skills and experience are required. Furthermore, the causes of crane device failures are often affected by mechanical parts that cannot be captured by sensors, etc., and the surrounding environment. Support in field surveys is essential.

An object of the present invention is to provide a crane failure diagnosis system which does not have an AI function or the like, does not require high technical ability or experience, and can support maintenance personnel in a field survey.

In order to solve the above problems, for example, the configuration described in the claims is adopted. The present invention includes a plurality of means for solving the above-mentioned problems, and to give an example thereof,
In the crane failure diagnosis system, analysis means for analyzing the failure cause from the failure status information and operation status information of the crane device, and support information for requesting support information consisting of at least confirmation items corresponding to the failure and replacement parts from the analyzed failure factors. It is characterized by including an acquisition means and a display means for displaying the acquired support information.

According to the present invention, machine learning and high technical ability / experience are not required, and it is possible to support maintenance personnel in a field survey. Issues, configurations and effects other than those described above will be clarified by the following description of the embodiments.

It is a perspective view which shows the whole structure of the inverter type crane device. It is a block diagram which shows the structure of the failure diagnosis system of the inverter type crane device. It is a block diagram which shows the structure of the failure factor analysis part of the cloud which becomes 1st Embodiment of this invention. It is explanatory drawing explaining the example of the display screen of the mobile display terminal which displayed the failure factor analysis flow which performs the factor analysis at the time of lock detection, and the display item of support information. It is explanatory drawing explaining the confirmation method of a brake mechanism and a brake circuit. It is explanatory drawing explaining the factor analysis method of the "question-and-answer type" which becomes the 2nd Embodiment of this invention. It is explanatory drawing explaining the example of the display screen of the mobile display terminal which displayed the failure factor analysis flow and the display item for displaying the "past casebook" which becomes the 3rd Embodiment of this invention. It is explanatory drawing explaining the past casebook.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, but the present invention is not limited to the following embodiments, and various modifications and applications are included in the technical concept of the present invention. Is also included in that range.

FIG. 1 shows the overall configuration of the inverter type crane device to which the present invention is applied, and FIG. 2 shows the configuration of the failure diagnosis system of the inverter type crane device according to the embodiment of the present invention.

In FIG. 1, the inverter type crane device includes a crane hook 1, a wire rope 2, a hoisting induction motor 3, a hoisting drum 4, a traversing induction motor 5, a traversing wheel 6, a traversing girder 7, a traveling induction motor 8, and the like. It is composed of a traveling wheel 9, a traveling girder 10, a hoisting / traversing inverter control device 11, an operation input device 12 suspended from a cable, a traveling inverter control device 13, and the like. Further, the hoisting induction motor 3, the traverse induction motor 5, and the traveling induction motor 8 each have a built-in brake 14 for an induction motor (see FIG. 2).

In the inverter type crane device, the load attached to the crane hook 1 is wound / unwound by the hoisting drum 4 rotated by the hoisting induction motor 3 to wind up / down the wire rope 2 in the Y direction (Y direction, -Y direction). (Indicated by the arrow), that is, move the luggage up and down. Further, the traversing induction motor 5 rotates the traversing wheel 6 and moves in the X direction (indicated by arrows in the X direction and the −X direction) along the traversing girder 7. Further, the traveling induction motor 8 rotates the traveling wheel 9 and moves in the Z direction (indicated by arrows in the Z direction and the −Z direction) along the traveling girder 10.

As shown in FIG. 2, the hoisting / traversing inverter control device 11 includes a hoisting / traversing inverter control unit 15, a hoisting inverter 16, and a traversing inverter 17. Further, the traveling inverter control device 13 includes a traveling inverter control unit 18 and a traveling inverter 19. Further, the hoisting / traversing inverter control unit 15 and the traveling inverter control unit 18 are connected by a communication line 20.

The hoisting induction motor 3 and the traverse induction motor 5 are controlled by the hoisting / traversing inverter control unit 15 housed in the hoisting / traversing inverter control device 11. That is, when the operator inputs a predetermined instruction from the operation input device 12, the hoisting / traversing inverter control unit 15 controls the hoisting inverter 16 and the traversing inverter 17, so that the hoisting inverter 16 and the traversing inverter 16 are controlled. The control information necessary for control is given to 17. An encoder 21 is attached to the hoisting induction motor 3, and rotation information of the hoisting induction motor 3 is input to the hoisting / traversing inverter control unit 15.

Then, the hoisting inverter 16 and the traversing inverter 17 apply the frequencies, voltages, and currents required for the hoisting induction motor 3 and the traversing induction motor 5, and simultaneously open and control the induction motor brake 14. As a result, in the case of the hoisting drum 4, the load attached to the crane hook 1 is moved in the Y direction without falling, and in the case of the traversing wheel 6, it is used for traversing along the traversing girder 7. The wheel 6 is moved in the X direction.

Similarly, in the traveling induction motor 8 attached to the traveling wheel 9, when the operator inputs a predetermined instruction from the operation input device 12, the traveling inverter control unit 18 stored in the traveling inverter control device 13 causes the traveling inverter. By controlling 19 and applying the frequency, voltage, and current required for the traveling induction motor 8 to the traveling induction motor 8 and simultaneously opening and controlling the induction motor brake 14, the traveling wheel 9 is operated along the traveling girder 10. Move in the Z direction.

Further, the hoisting / traversing inverter control device 11 is provided with a communication unit 22, and the communication unit 22 is connected to the hoisting / traversing inverter control unit 15 by a communication line 23. The communication unit 22 is connected to a cloud network 24 configured by a server having a calculation function by wireless communication, and the cloud network 24 is also connected to a mobile display terminal 25 having a communication unit by wireless communication.

Therefore, the communication unit 22 and the mobile display terminal 25 are set in an environment in which they can access each other via the cloud network (hereinafter referred to as cloud) 24. As the mobile display terminal 25, a portable tablet terminal or a personal computer (PC) can be used.

The cloud 24 equipped with a server is installed in a crane device manufacturing company or a maintenance company. Further, the mobile display terminal 25 is carried by a maintenance staff member, whereby support information can be displayed on the mobile display terminal 25 so that the crane device can be restored at an early stage in response to a failure.

That is, the server of the cloud 24 has a function of automatically calculating / analyzing the cause of the failure from the failure state information at the time of failure detection and the operation state information corresponding to the failure state information, and the failure analyzed by this function. Support information corresponding to the factor is transmitted to the mobile display terminal 25. On the mobile display terminal 25, this support information is displayed on the display screen, and the maintenance staff will carry out the restoration work of the crane device based on the support information. This support information is, at least, confirmation of the failure part, request for correction of the failure part, presentation of necessary replacement parts, etc., but it is also possible to display further support information.

Instead of the mobile display terminal 25, it may be provided in the crane device as a display terminal, or may be provided as a desktop display terminal in the installation company in which the crane device is installed. In short, it is sufficient if the maintenance staff can easily receive support for dealing with failures and abnormalities.

Here, various fault detections of the crane device are carried out by the hoisting / traversing inverter control unit 15 and / or the traveling inverter control unit 18, and the fault detection here is performed by a well-known method. Therefore, a detailed explanation will be omitted. Then, the failure state information detected by the hoisting / traversing inverter control unit 15 and / or the traveling inverter control unit 18 is converted into an error code represented by an alphabet or a number according to the failure content. The communication unit 22 is sent via the communication line 23.

At least, the communication unit 22 associates the error code with the operation status information of the crane device at the time of failure detection, and transmits the error code to the cloud 24. In the cloud 24, the failure factor is calculated, estimated, and specified from the error code and the operation state information of the crane device at the time of failure detection by the calculation function of the server. Further, the server of the cloud 24 calculates support information for the maintenance staff based on this failure factor.

The support information requested by the cloud 24 is sent to the mobile display terminal 25 by wireless communication, and the mobile display terminal 25 displays text data on the display screen or notifies by voice so that the maintenance staff can recognize it. Provide support information at. Here, the communication unit 22 and the cloud 24 can communicate wirelessly or by wire. Further, since the portable display terminal 25 is carried by a maintenance staff, it is preferable to communicate wirelessly.

If the cause of the failure cannot be identified, it is possible to provide support information to be supported in the field survey in a form that can be recognized by the maintenance staff. Here, by using the mobile display terminal 25, the maintenance staff can prepare replacement parts in advance and go to the site, so that quick recovery is possible from this point as well.

In this embodiment, support information is requested using the server of the cloud 24, but if the computer system has sufficient capacity, support is provided by the hoisting / traversing inverter control unit 15 and / or the traveling inverter control unit 18. You may ask for information. In response to this, the communication unit 22 and the mobile display terminal 25 are directly connected to send support information to the mobile display terminal 25 by communication, and the support information is provided in a form that can be recognized by the maintenance staff. May be.

Here, the server of the cloud 24 includes the processing unit shown in FIG. In FIG. 3, the information reception processing unit 30 receives the operation state information and the data representing the failure state information from the communication unit 22, and the received operation state information and the failure state information data are combined with the failure state information storage processing unit 31. The operation information storage processing unit 34 is divided and stored. Therefore, the failure state information storage processing unit 31 stores the failure state information data, and the operation information storage processing unit 34 stores the operation state information data.

In this case, if an identifier is added to the data of the operation state information and the failure state information, these can be easily separated and stored. Further, if this identifier is given, the data of the operation state information and the failure state information can be stored without being separated.

Then, when analyzing the failure factor, the failure factor analysis processing unit 32 executes the analysis of the failure factor, but depending on the content of the failure, not only the failure state information but also the operation state information can be utilized. The analyzed failure factor is sent to the display content output processing unit 33, and the display content output processing unit 33 calculates support information in order to recover the failure factor.

As described above, this support information is at least confirmation of the failure part, request for correction of the failure part, presentation of necessary replacement parts, and the like, but it is also possible to present further support information. Then, the requested support information is transmitted from the display content output processing unit 33 to the mobile display terminal 25 by wireless communication.

Next, an analysis of the cause of failure executed by the server of the cloud 24 and a specific example of displaying the support information obtained by this analysis on the mobile display terminal 25 will be described with reference to FIG. In this example, for example, when the hoisting / traversing inverter control unit 12 detects the lock of the electric motor, which is one of the failure state information, the factor analysis flow of the lock detection by the server of the cloud 24 and the portable display terminal 25 Shows an example of displaying support information by.

Here, the error code for lock detection is "E01". The lock detection is a failure to detect that the motor is locked if the rotation speed of the motor is one rotation or less for a certain period of time, for example, one second of operation. The rotation of the motor is measured by an encoder 21 (see FIG. 2) that measures the rotation of the motor shaft.

The failure factor analysis flow shown on the left side of FIG. 4 shows a rough control step executed by the server of the cloud 24, and the portion shown on the right side of FIG. 4 is displayed as a display item on the display screen 25D of the mobile display terminal 25. Shows the support information to be provided.

The display screen 25D shown by the solid line in FIG. 4 displays both rough control steps and support information. By displaying both the control step and the support information in this way, it is possible to help the maintenance staff understand the failure status information and proceed with the recovery work more quickly. The embodiment shown below is an example in which both the control step and the support information are displayed.

Further, as another display form, as shown by the broken line frame on the right side of FIG. 4, the support information can be individually displayed on the display screen 25D for each failure item. As shown in the individual broken line frames, if there is support information corresponding to the failure, it is displayed on the display screen 25D, and if there is no support information corresponding to the failure, it is not displayed on the display screen 25D. According to this, since the amount of information to be displayed is small, the mobile display terminal 25 can be formed in a small size, which makes it easy to carry.

Hereinafter, the method of displaying the support information for the failure will be described with reference to FIG. 4, but it is an example in which both the control step and the support information are displayed as described above. Here, the control step of the failure factor analysis flow is executed by the computer provided in the server, and can be regarded as a functional unit that executes a predetermined operation. The same applies to the mobile display terminal 25.

In step S101, first, when the server of the cloud 24 receives the failure state information of the lock detection (E01) from the communication unit 22, the operation state information of the crane device at the time of executing the lock detection (E01) received at the same time is used. Check the output status of the inverter. If there is no output of the inverter, it can be determined that the inverter is abnormal. Therefore, as shown in the display item D201, a request display for prompting the replacement of the inverter, which is a presentation of necessary replacement parts, is performed. The reason why it can be determined that the inverter is abnormal is that it is common to release the brake after the inverter outputs.

Here, the "request display" is a message expressed in a sentence for requesting the maintenance staff to perform necessary work, and the same applies to the following explanation.

If there is an output of the inverter, then in step S102, the state of the lifting load at the time of lock detection (E01) is confirmed. If a load exceeding the rated load of the product specifications or a lifting of the earth (a state where a hook is hooked on a building installed on the ground, etc.) is detected, improvement of the usage method is promoted as shown in the display item D202. Display the request.

If the lifting load is within the normal range, then in step S103, the power supply voltage at the time of lock detection (E01) is confirmed. If the power supply voltage is lower than the product specifications, a request display for urging the improvement of the power supply environment is performed as shown in the display item D203, including the possibility of a momentary power failure or a power outage.

Here, if the judgments of steps S101 to S103 described above do not apply, confirmation after step S104 is required, so the maintenance staff conducts a field survey. For this reason, although not shown in the figure, the server of the cloud 24 displays to the mobile display terminal 25 that a field survey is necessary, and instructs the maintenance staff to go to the field survey. ing.

Then, the maintenance staff conducts a field survey while observing the display of the failure factor analysis flow for performing the factor analysis shown in FIG. 4, for example, using the mobile display terminal 25.

If the power supply voltage is not low in step S103, then the rotational state of the motor is checked in step S104. For example, if the motor does not rotate, the process proceeds to step S105 to check the brake state, and if the brake does not release, a request display prompting the check of the brake mechanism and the brake circuit is displayed as shown in display item D205. conduct. In this embodiment, the display portion of the display item D205 has a switch function, and when the part of the display item D205 is selected (touched by a finger), the display screen is switched and the confirmation item shown in FIG. 5 is displayed. Is displayed. This confirmation item is stored in the server of the cloud 24, and is sent from the server of the cloud 24 when the display item D205 is selected.

FIG. 5 shows a method of confirming the brake mechanism and the brake circuit. The contents to be displayed are the structure diagram of the brake shown in the display item D501 and the parts list of the components, the confirmation item of the brake mechanism shown in the display item D502, the parts list of the circuit and the components of the brake shown in the display item D503, and the display items. This is a confirmation item of the brake circuit shown in D504.

By implementing the displayed confirmation items, the abnormal part can be easily identified, and the part code required when ordering replacement parts is also displayed, so that parts can be ordered smoothly.

By selecting the displayed part code, it is possible to move to the order request (estimate request) screen. Here, the confirmation items as shown in FIG. 5 are similarly set in other display items (for example, display item D207 and display item D210 described later).

If the brake is released in step S105, then in step S106, the disconnection of the motor cable is checked, and a request display prompting the replacement of the motor cable is performed as shown in the display item D206 that the disconnection has occurred. If the motor cable is not broken, a request is displayed to prompt confirmation of the rotation transmission mechanism of the motor, as shown in the display item D207.

If the motor is rotating in step S104, then in step S107, the disconnection of the encoder cable is checked, and if the encoder cable is disconnected, a request display prompting the replacement of the encoder cable is displayed as shown in the display item D208. I do.

If there is no disconnection in the encoder cable, finally in step S108, there is a possibility that a high-power cable is close to the encoder cable. Therefore, as shown in display item D209, it is urged to review the crawling of the encoder cable. Display the request. On the other hand, if the high-power cable is not close to the encoder cable, a request display prompting the user to check the encoder mechanism and the encoder circuit is displayed.

In this way, since the support information corresponding to each failure can be displayed on the mobile display terminal 25, machine learning and high technical ability / experience are not required, and it is possible to support the maintenance staff in the field survey. Will be.

In the first embodiment described above, the failure factor analysis flow and the support information are displayed on the display screen of the mobile display terminal 25. On the other hand, in the second embodiment of the present invention, the server of the cloud 24 can also display the support information in a "question-and-answer format" for each execution order of the control steps of FIG. For example, step S105 and display item D205 in FIG. 4 will be described as follows.

As shown in the display screen 25D of FIG. 6A, the maintenance staff responded to the question "Does the brake release when Q5 is operated?" From the server of the cloud 24, and the maintenance staff used the operation input device 12 of the crane device. Operate to release the brake. As a result, when the brake is released, the maintenance staff selects "YES" of the display item D602. In response to this, the server of the cloud 24 executes the control step of the next step S106 of FIG. Also in this control, the same display items as above are displayed.

On the other hand, if the brake is not released, the maintenance staff selects "NO" of the display item D603. In response to this, the server of the cloud 24 displays support information such as "Please check the brake mechanism and brake circuit" to the maintenance staff as shown in the display screen 25D of FIG. 6 (b). The request is displayed as D205. After that, it is possible to perform an operation corresponding to the failure factor analysis flow shown in FIG. 4 to provide a question and support information to the maintenance staff.

In this way, support information can be displayed in order in a "question-and-answer format". As a result, it is possible to display support information corresponding to each failure on the mobile display terminal 25, so that machine learning and high technical skills / experience are not required, and it is possible to provide support in the field survey of maintenance staff. Become.

In the third embodiment of the present invention, a selection button for a collection of past cases is provided on the display screen shown in FIG. 4, and by selecting this selection button, a list of similar cases that have occurred in the past can be browsed. This makes it easier for maintenance personnel to analyze factors. This past casebook is updated every time the failure factor analysis flow is executed.

In FIG. 7, the display item D700 of the “past casebook” is set in a part of the area of the mobile display terminal 25. This display item D700 is displayed for each type of error code (type of failure status information), and in FIG. 7, the past casebook in which the error code is "E01 (lock detection)" is searched. It has become.

Therefore, when the maintenance staff selects the display item D700 displayed on the display screen 25D of the mobile display terminal 25, the past casebook in "E01 (lock detection)" is searched on the server of the cloud 24, and the mobile display terminal 25 is used. It is displayed on the display screen 25D. FIG. 8 shows a collection of searched cases. This casebook displays a list of similar cases that have occurred in the past with respect to "E01 (lock detection)". The past casebook is stored in the server of the cloud 24, and is transmitted from the server when the display item D700 is selected.

In this list, "date of occurrence", "rated load", "phenomenon of failure", "cause", and "countermeasure" are displayed. Therefore, maintenance personnel can easily identify the cause by knowing what kind of failure occurs frequently from this list, and also show countermeasures, so that recovery work can be performed quickly. .. As described above, in the present embodiment, since the support information can be provided to the maintenance staff in the field survey, the factor analysis can be easily performed and the smooth replacement parts can be ordered.

As described above, in the present invention, the analysis means for analyzing the failure cause from the failure state information and the operation state information in the crane device, and at least the confirmation items and replacement parts corresponding to the failure from the analyzed failure factors are supported. It is characterized by being provided with a support information acquisition means for requesting information and a display means for displaying the acquired support information.

According to this, machine learning and high technical ability / experience are not required, and it is possible to support maintenance staff in the field survey.

The present invention is not limited to some of the above-described embodiments, and includes various modifications. The above-mentioned examples have been described in detail in order to explain the present invention in an easy-to-understand manner, and are not necessarily limited to those having all the described configurations. Further, it is possible to replace a part of the configuration of one embodiment with the configuration of another embodiment, and it is also possible to add the configuration of another embodiment to the configuration of one embodiment. It is also possible to add, delete, or replace other configurations with respect to the configurations of each embodiment.

1 ... Crane hook, 2 ... Wire rope, 3 ... Winding induction motor, 4 ... Winding drum, 5 ... Traverse induction motor, 6 ... Traverse wheels, 7 ... Traverse girder, 8 ... Travel guidance motor, 9 ... Traveling wheels, 10 ... Traveling girders, 11 ... Winding / traversing inverter control device, 12 ... Operation input device, 13 ... Driving inverter device, 14 ... Driving inverter brake, 15 ... Winding / traversing inverter control unit, 16 ... hoisting inverter, 17 ... traversing inverter, 18 ... traveling inverter control unit, 19 ... traveling inverter, 20 ... communication line,
21 ... Encoder, 22 ... Communication unit, 23 ... Communication line, 24 ... Cloud, 25 ... Mobile display terminal, 25D ... Display screen, 30 ... Information reception processing unit, 31 ... Failure status information storage processing unit, 32 ... Failure factor analysis Processing unit, 33 ... Display content output processing unit, 34 ... Operation information storage processing unit.

Claims (6)

In the crane failure diagnosis system
An analysis means for analyzing the failure cause from the failure state information and the operation state information in the crane device, and a support information acquisition means for requesting support information consisting of at least confirmation items corresponding to the failure and replacement parts from the analyzed failure factors.
A crane failure diagnosis system including a display means for displaying the acquired support information. In the crane failure diagnosis system according to claim 1,
The analysis means and the support information acquisition means are cloud servers.
The display means is a mobile display terminal carried by a maintenance staff.
The crane device includes a crane-side control unit that detects the failure state information and the operation state information, and transmits the failure state information and the operation state information to the cloud server.
The cloud server analyzes the failure factor based on the failure state information and the operation state information sent from the crane side control unit, and further obtains the support information corresponding to the failure factor, and also obtains the support information. A server-side control unit that transmits the failure factor and the support information or the support information to the mobile display terminal is provided.
The mobile display terminal is a crane failure diagnosis system characterized by including the failure factor and the support information, or a display screen for displaying the support information. In the crane failure diagnosis system according to claim 2,
The mobile display terminal is a crane failure diagnosis system characterized by displaying a failure factor analysis flow for obtaining the failure factor and the support information corresponding to the analysis result of the failure factor analysis flow. In the crane failure diagnosis system according to claim 3,
When the support information displayed on the display screen is selected by the maintenance staff, the mobile display terminal acquires confirmation items related to the support information from the server of the cloud, and switches the display screen to check the confirmation items. A crane failure diagnosis system characterized by displaying. In the crane failure diagnosis system according to claim 3,
The mobile display terminal displays a display item indicating a past failure case related to the detected failure state information, and when the display item displayed on the display screen is selected by the maintenance staff, the cloud. A cloud failure diagnosis system characterized in that the past failure cases are acquired from the server and the display screen is switched to display the past failure cases. In the crane failure diagnosis system according to claim 1,
The analysis means and the support information acquisition means are cloud servers.
The display means is a mobile display terminal carried by a maintenance staff.
The crane device includes a crane-side control unit that detects the failure state information and the operation state information, and transmits the failure state information and the operation state information to the cloud server.
The cloud server has a function of analyzing the failure factor based on the failure state information and the operation state information sent from the crane side control unit and sending a question to the mobile display terminal for each failure factor. Have and
The mobile display terminal has a function of displaying a question on a display screen and transmitting a maintenance staff's answer to the question to the cloud server.
The cloud server has a function of transmitting the support information corresponding to the failure factor to the mobile display terminal based on the answer of the maintenance staff to the question sent from the mobile display terminal.
The mobile display terminal is a crane failure diagnosis system characterized by having a function of displaying the support information on the display screen.

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