JP3767751B2 - Wire rope management system, life judging method and life judging program - Google Patents

Description

  The present invention relates to a wire rope management system, a life determination method, and a life determination program for determining whether or not a wire rope has reached the end of its life.

Conventionally, wire ropes used in cranes or the like have to be regularly replaced because the strands of the wire are broken in the ropes while being repeatedly used.
The period of use, which is a guideline for replacing the wire rope, is generally set to a short period in view of sufficient safety, and even those that have not reached the end of their life may be discarded. Therefore, the cost required for the wire rope can be reduced if a technology for accurately ascertaining the replacement date of the wire rope can be secured.

As a prior art for solving such a problem, there is a “crane wire rope life determination method” (see Patent Document 1). This is the ratio between the life calculation by the Niemann equation and the actual number of bendings as the life ratio data, and the ratio between the torsion test result of the wire that has not passed through the sheave and the torsion test result of the wire that has passed through the sheave as the deterioration ratio. This is a technique for determining whether the wire rope has reached the end of its life based on the relationship. It has been described that this technique allows the wire rope to be replaced in an appropriate period and reduces the cost required for the wire rope.
JP-A-9-178611

  The method of the prior art described in the said patent document 1 requires investigation of the hoisting distance and load for every crane. Also, this method tends to cause variations in test data depending on the handling of the strands, and skill is required for data collection. Furthermore, since the wire rope has many strands, this method requires a lot of labor to collect data, and it seems that there is a problem that the life of the wire rope cannot be easily determined.

  Therefore, an object of the present invention is to provide a wire rope management system, a life determination method, and a life determination program that can determine the life of a wire rope simply and accurately.

  In order to achieve the above object, the wire rope management system of the present invention obtains a combination of operation index data indicating the degree of operation of the crane in the past and data on the elongation rate and residual strength of the wire rope at the time of the operation. The life calculation means for calculating the life of the wire rope based on these data, the operation index data of the crane in operation, and the life of the wire rope calculated by the life calculation means are obtained, and the operation index data And life determining means for determining whether or not the wire rope has reached the end of life based on the life of the wire rope, and display means for displaying the result of determining the life of the wire rope. Here, the lifetime calculation means calculates the lifetime of the wire rope using the approximate line representing the relationship between the operation index calculated from the combination of the acquired data and the elongation rate, and the residual strength data, and determines the lifetime. The means may determine whether or not the wire rope has reached the end of life based on whether or not the acquired operation index data of the crane in operation exceeds the life calculated by the life calculation means. In addition, the wire rope management system may further include audio output means for outputting the life determination result of the wire rope by audio.

  As a result, the life of the wire rope is calculated based on the operation index data of the crane and data such as the elongation rate and residual strength of the wire rope that do not require skill, and it is determined whether or not the wire rope has reached the end of the life. The effect of realizing a wire rope management system that can easily determine whether or not the lifetime has been reached is exhibited.

  The life of the wire rope is the first operation index that reaches the elongation rate of the wire rope that is prohibited by the crane safety standards and crane structure standards, and the crane safety rules and crane structure standards are prohibited from use. It is good also as a smaller operation index among the 2nd operation indices which reach the residual strength of the wire rope to be done.

  Here, the elongation rate and the residual strength, which are parameters for evaluating the life of the wire rope in the present invention, will be outlined. Although the growth rate has a relatively strong correlation with the operation index, it has a characteristic that it rapidly changes from a certain point in time. On the other hand, the residual strength does not show a strong correlation with the operation index, but is closely related to the life of the wire rope. Therefore, by monitoring the residual strength data, it is possible to calculate the life of the wire rope taking into account that the elongation data changes rapidly, so the wire rope can calculate the life of the wire rope with high accuracy. The effect of realizing a management system is demonstrated.

  In addition, regarding the life of the wire rope, a safety rule such as a crane, a first operation index in which the elongation rate of the wire rope prohibited to be used according to the crane structure standard falls within the range of variation in the elongation rate data, It is good also as a smaller operation parameter | index among the 2nd operation parameter | indexes which reach the residual strength of the wire rope for which use is prohibited by the crane structure standard. As a result, the life of the wire rope can be calculated taking into account the variation in the elongation rate data, so a wire rope management system that can determine whether the wire rope has reached the end of its life with an emphasis on safety. The effect that it can be realized is demonstrated. The wire rope management system may further include a variation setting unit that arbitrarily sets the variation.

  As a result, the life setting of the wire rope can be changed freely depending on whether the damage caused by the wire rope breakage is large or not, such as when it is directly connected to a human disaster or when equipment damage is large. The effect that the wire rope management system which enables the lifetime determination of the corresponding wire rope is realizable is exhibited.

  The wire rope is used in a plurality of cranes having different use conditions, the life calculation means calculates the life of the wire rope for each crane, and the wire rope management system further includes the plurality of cranes. A database file creation means for creating a database file including crane data for identifying a crane from the cranes of the crane, a life of the wire rope in the crane identified by the crane data, and a storage means for storing the database file The lifetime determination means may search a database file based on the crane data and determine whether the wire rope has reached the lifetime based on the lifetime of the wire rope included in the corresponding database file. .

  As a result, the life of the wire rope is calculated for each crane, and after determining the crane from a plurality of cranes, it is determined whether or not the wire rope has reached the end of its life. The effect that the wire rope management system which can determine easily whether the lifetime has reached is realizable is exhibited.

  The wire rope has a plurality of types, and the plurality of types of wire ropes are used in a plurality of cranes having different use conditions, and the life calculation means calculates the life of the wire rope between the crane and the wire rope. Calculated for each combination, the wire rope management system further includes crane data for identifying a crane from the plurality of cranes, wire rope data for identifying a wire rope from the plurality of types of wire ropes, the crane data and the wire A database file creating means for creating a database file including the life of the wire rope in the combination of rope data; and a storage means for storing the database file, wherein the life judging means is based on the crane data and the wire rope data. There search the database file, based on the life of the wire rope contained in the corresponding database file may be determined whether the wire rope life is over.

  This is calculated for each combination of crane and wire rope. Also, the crane is identified from a plurality of cranes, and the wire rope is identified from a plurality of types of wire ropes. Since the determination is performed, the effect of realizing a wire rope management system that can easily determine whether or not the wire rope has reached the end of its life regardless of the number of cranes and the type of the wire rope is exhibited.

  Further, the wire rope and the operation index have a plurality of types, and the plurality of types of wire ropes are used in a plurality of cranes having different use conditions, and the life calculation means calculates the life of the wire rope by a crane, Calculated for each combination of wire rope and operation index, the wire rope management system further includes crane data for identifying a crane from the plurality of cranes, and wire rope data for identifying a wire rope from the plurality of types of wire ropes. A database file creating means for creating a database file including operation index type data for specifying an operation index from the plurality of types of operation indices, and the life of the wire rope in the combination of the crane data, the wire rope data, and the operation index; The database file Storage means for storing data, and the life determination means searches a database file based on the crane data, wire rope data and operation index type data, and determines the life of the wire rope included in the corresponding database file. It may be determined whether or not the wire rope has reached the end of its life. Here, the operation index may be a suspension count, a suspension load, or a usage time.

  As a result, the calculation is made for each combination of crane, wire rope and operation index, the crane is specified from a plurality of cranes, the wire rope is specified from a plurality of types of wire ropes, and the operation index is calculated from a plurality of types of operation indexes. Since it is determined whether or not the wire rope has reached the end of its life, it is easy to determine whether the wire rope has reached the end of its life regardless of the number of cranes, the type of wire rope, and the type of operation indicator. The effect that the wire rope management system which can be judged is realizable is exhibited.

The wire rope management system further includes a remaining life calculation means for calculating the remaining life of the wire rope based on the operation index data of the crane input for calculating the remaining life of the wire rope and the life of the wire rope. The display means may include a remaining life display means for displaying a remaining life of the wire rope.
As a result, the remaining life of the wire rope is calculated in accordance with the input of the operation index data, so that an effect of realizing a wire rope management system that enables simple prediction of the life arrival time of the wire rope is exhibited.

The wire rope management system may further include detection means for detecting an operation index of the crane and data generation means for generating operation index data from the operation index detected by the detection means.
As a result, since the operation index data is collected by the detection means, an effect of realizing a wire rope management system that can accurately and easily determine whether or not the wire rope has reached the end of its life is exhibited.

  The present invention can be realized not only as a wire rope management system as described above but also as a life determination method using steps provided in the wire rope management system as a step, and a computer or the like as a means in the wire rope management system. Needless to say, it can be realized as a functioning life judging program.

According to the wire rope management system according to the present invention, since it is determined based on the operation index data, further the elongation rate data obtained by the tensile test and the residual strength data, it is possible to realize an easy and highly accurate life determination. Play.
According to the wire rope management system of the present invention, the wire rope management system can calculate the life of the wire rope with high accuracy since the standard for determining the life of the wire rope is determined in consideration of not only the elongation data but also the residual strength. The effect of realizing is achieved. Further, by using a wire rope life determination criterion that takes into account data variations, it is possible to achieve a wire rope management system capable of determining the life of a wire rope with particular emphasis on safety.

According to the wire rope management system according to the present invention, the remaining life of the wire rope is calculated according to the input of the operation index data of the wire rope being used. The rope management system can be realized.
Therefore, according to the present invention, it is possible to provide a wire rope management system that can easily and accurately determine whether or not the wire rope has reached the end of its life, and its practical value is extremely high.

Hereinafter, a wire rope management system according to an embodiment of the present invention will be described with reference to the drawings. First, after roughly explaining the life determination procedure of the wire rope, the wire rope management system will be described.
FIG. 1 is a flowchart showing a rough flow of a wire rope life determination procedure according to an embodiment of the present invention.

  First, the wire rope acceleration test is conducted, and the wire rope elongation rate data and residual strength data when use is prohibited are collected based on the crane safety regulations and crane structure standards. A reference is set (step S100). The acceleration test will be conducted on multiple pieces of the same type of wire rope and data will be collected. By statistically processing this result, it is possible to obtain an expansion rate criterion and a residual strength criterion in consideration of data variation.

Here, as shown in the external view of the wire rope in FIG. 2A, the wire rope is composed of a core steel 200 and six strands 210 twisted around the core steel 200, and a strand 220. And constitutes the strand 210 twisted around the core wire 230. In addition, the crane safety regulations and crane structure standards prohibit the use of the following wire ropes 1 to 3.
1. In the side of the wire rope shown in FIG. 2B and the wire rope portion within the interval d in the cross-sectional view, that is, the wire rope portion composed of the strand 210a, the strand 210b, the strand 210c, the strand 210d, the strand 210e, and the strand 210f. 10% or more of the total wires are broken.
2. The diameter reduction rate exceeds 7% of the nominal diameter.
3. Kinked or severely deformed or corroded.

  Next, a tensile test of the wire rope before use is performed, and elongation rate data and residual strength data are collected (step S110). Then, after using the same type of wire rope as the wire rope from which the data was collected, the crane operation index data related to this wire rope, the elongation rate data and the remaining strength data from the second tensile test are collected (step) S120). The tensile rate data and residual strength data of the wire rope before being used in the crane were collected by performing a tensile test, but without performing the tensile test, the manufacturer recorded the tensile rate data of the quality inspection record during the production of the wire rope. And residual strength data may be used. Furthermore, a tensile test may be conducted on the portion of the wire rope that has not been used, that is, the portion that does not pass through the sheave (pulley) and is not subjected to bending fatigue, and the elongation rate data and residual strength data are collected and used. Good. Here, the operation index refers to the number of crane suspensions, suspension load, or usage time, and the operation index data refers to actual data such as the total number of crane suspensions, total suspension load, or total usage time within a certain period. is there. As a sampling position of the sample in the wire rope tensile test after use, a range that passes through the sheave most in the longitudinal direction of the rope and is subjected to bending fatigue is selected. Note that the elongation rate data and the residual strength data before and after use of the wire rope are collected a plurality of times.

  Next, plot the stretch rate data collected with the stretch rate on the vertical axis and the operation index on the horizontal axis, calculate the variation 3σ of the stretch rate data, and then obtain an approximate line from the plotted stretch rate data. The line is translated by 3σ in the negative direction of the vertical axis to obtain an expansion rate standard line (step S130). Similarly, plotting the collected residual strength data with the residual strength on the vertical axis and the operation index on the horizontal axis, it is confirmed whether the residual strength standard is satisfied. (Step S140). Note that 3σ is calculated as the variation in the expansion rate data, and the approximate line is translated by 3σ to obtain the expansion rate standard line. However, as the variation, σ or 2σ is calculated, and the approximate line is translated by moving by σ or 2σ. It may be a rate standard line. Here, the variation 3σ of the stretch rate data is obtained before and after the use of the wire rope, but if one of the larger values is used for the parallel movement of the approximate line, safety can be emphasized more. . FIGS. 3A to 3E are diagrams showing an example in which an expansion rate standard line is drawn. This figure shows data obtained using the same type of wire rope for different types of cranes. In the figure, a graph of the elongation rate is shown on the left side of the figure and the residual strength is shown on the right side of the figure. In the graph of the stretch rate, the stretch rate data is plotted with the stretch rate as the vertical axis and the number of suspensions as the horizontal axis, and a line indicating the stretch rate standard (10% disconnection stretch rate) is drawn. In the residual strength graph, the residual strength data is plotted by plotting the residual strength data with the residual strength as the vertical axis and the number of suspensions as the horizontal axis, and a line indicating the residual strength criterion (10% disconnection residual strength) is drawn. Here, a line obtained by translating the approximate line by 3σ is used as the expansion rate standard line.

  Subsequently, an operation index value at a position where the expansion rate standard and the expansion rate standard line intersect is calculated. On the other hand, it is confirmed whether the residual strength data is below the residual strength standard. Then, the operation index at the position where the elongation rate standard line intersects the elongation rate criterion is defined as the lifetime, but when the residual strength data is below the residual strength criterion, the location is defined as the lifetime (step S150). For example, in FIG. 3A, since the residual strength data does not fall below the residual strength standard, the life of the wire rope is about 11000 ch. As described above, while using an approximate line representing the correlation with the operation index data for the expansion rate, the reason for using the data itself for the remaining strength is that the expansion rate has a relatively strong correlation with the operation index, but at a certain point in time. This is because the residual strength is closely related to the life of the wire rope although the correlation with the operation index does not appear so strongly.

Subsequently, operation index data of the wire rope used in the crane is collected (step S160).
Finally, it is determined whether the used wire rope has reached the end of life based on the collected operation index data and the already obtained end of life of the wire rope (step S170).

Next, the wire rope management system will be described.
FIG. 4 is a system configuration diagram showing a use situation of the wire rope management system in the embodiment of the present invention.
The wire rope management system of the present embodiment is intended to easily determine whether or not the wire rope has reached the end of its life, and is connected to the life determination device 410 via the telecommunication line 420. Crane control devices 400a, 400b, 400c and a life determination device 410.

FIG. 5 is a functional block diagram of the wire rope management system in the embodiment of the present invention.
As shown in FIG. 5, the wire rope management system according to the present embodiment uses a crane control device 500 that controls a crane that uses a wire rope, and the input wire rope extension rate data and residual strength data. Calculate the life of the wire rope, use the calculated life of the wire rope to determine whether the used wire rope has reached the end of its life, or use the calculated life of the wire rope. A life determination device 510 which is a computer device for calculating the remaining life of the wire rope and a telecommunication line 520.

  The crane control device 500 includes an operation unit 501 that is an input device such as a keyboard and a mouse that accepts an operation input from a user such as data input, and a CRT display that displays a user interface screen in response to transmission of information from the integration unit 505 A display unit 502 such as a liquid crystal display, a detection unit 503 that detects an operation index of a crane, a storage unit 504 that stores an operation index table 504a, and an operation index every time the operation index is detected by the detection unit 503. The operation index data is generated by integration, the operation index table 504a of the storage unit 504 is transmitted to the transmission / reception unit 506 at regular intervals, and the operation index table 504a transmitted from the integration unit 505 is used as the lifetime determination device 510. The integrating unit 505 includes a table creating unit 505. Equipped with a.

  The table creation unit 505a creates the operation index table 504a based on the operation index data generated by the integration unit 505, the crane data related to the crane input by the operation unit 501, the wire rope data related to the wire rope, and the operation index type data. The operation index table 504a already stored in the storage unit 504 is replaced. Here, the crane data is a crane management number assigned by classifying a plurality of cranes according to usage conditions such as a lift, and the wire rope data is a classification of a plurality of wire ropes by shape or material. The model number or wire rope name of the attached wire rope. The operation index type data is a type of operation index such as the number of times of suspension, suspension load or usage time.

FIG. 6 is a schematic diagram illustrating an example of the operation index table 504a.
As shown in FIG. 6, the operation index table 504a includes operation index data (for example, total suspension count 8000ch, total usage time 600h) registered for each operation index type data (the number of suspensions, usage time), crane Data (for example, crane management number HM350T) and wire rope data (for example, wire rope model number W400).

  The life determination device 510 displays a user interface screen and an image in response to transmission of information from the operation unit 511 which is an input device such as a keyboard and a mouse that accepts an operation input from the user such as data input and the calculation unit 514. Display unit 512 such as a CRT display or liquid crystal display, storage unit 513 that is a recording medium such as a hard disk that stores a plurality of database files 513a regarding the life of the wire rope, calculation of the life of the wire rope, the wire rope has reached the end of its life And a calculation unit 514 for calculating the remaining life of the wire rope and a receiving unit 515 for receiving the operation index table 505a from the crane control device 500. The calculation unit 514 creates a life criterion. Part 514a.

The life criterion creation unit 514a creates a database file 513a based on the extension rate data, the remaining strength data, and the operation index type data input by the operation unit 511, and the wire rope life calculated by the calculation unit 514. .
FIG. 7 is a schematic diagram showing an example of the database file 513a.
As shown in FIG. 7, the database file 514 a includes a file header, a “stretch rate” field, and a “residual strength” field. The file header includes records of “crane type” (for example, crane model number HM350T), “wire rope type” (for example, wire rope model number W400), and “operation index type” (number of suspensions). In the “stretch rate” field, “stretch rate standard” (for example, 0.7%), “stretch rate data” (for example, a table including the total number of suspensions and stretch rate values), “stretch rate standard line” (For example, y = aX + b). The “residual strength” field includes records of “residual strength criteria” (for example, 82%) and “residual strength data” (for example, a table including the total number of suspensions and the residual strength value).

The operation (operation for creating the database file 513a) of the wire rope management system according to the embodiment of the present invention configured as described above will be described in order along the flowchart shown in FIG.
The calculation unit 514 receives the operation of starting the creation of the database file 513a by the user, and the display unit 512 displays the expansion rate standard, the remaining strength standard, the operation index type data, the wire rope expansion rate before and after using the crane. A data input screen is displayed for requesting input of variation in the expansion rate data such as data, residual strength data, wire rope data, crane data, operation index type data, and 3σ (step S800).

The calculation unit 514 calculates the wire rope from the stretch rate standard, the remaining strength standard, the wire rope stretch rate data, the remaining strength data, and the variation in the stretch rate data input from the operation unit 511 before and after use. The lifetime is calculated (step S810).
The life criterion creation unit 514a creates a database file 513a from the wire rope life calculated by the calculation unit 514 and the data already input by the operation unit 511, and transmits the database file 513a to the storage unit 513 (step S820).

Next, the operation of the wire rope management system (operation for determining whether or not the wire rope has reached the end of its life) will be described in order along the flowchart shown in FIG.
The accumulating unit 505 displays a data input screen for requesting input of crane data, wire rope data, and operation index type data on the display unit 502 in response to an operation to start using a new wire rope by the user (step S900).

The integrating unit transmits the data input by the operation unit 501 to the table creation unit 505a, and causes the detection unit 503 to start detecting the operation index specified by the operation index type data input by the operation unit 501. The detection unit 503 starts detecting the operation index (step S910).
The integration unit 505 integrates the operation index every time the operation index is detected by the detection unit 503, and generates operation index data (step S920).

The table creation unit 505a creates an operation index table 504a based on the data transmitted from the accumulation unit 505 and the operation index data generated by the accumulation unit 505, and the operation index table 504a stored in the storage unit 504. (Step S930).
The integration unit 505 transmits the operation index table 504a stored in the storage unit 504 to the transmission unit 506 at regular intervals. The transmission unit 506 transmits the operation index table 504a to the life determination device 510 (step S940).

  The receiving unit 515 receives the operation index table 504 a via the telecommunication line 520 and transmits it to the calculating unit 514. The calculation unit 514 searches the storage unit 513 every time the operation index table 504a is received, and includes a database file including crane data, wire rope data, and operation index type data registered in the operation index table 504a in the file header. Search for 513a (step S950). As a result of the search, if the corresponding database file 513a is not stored in the storage unit 513 (No in step S960), no further operation is performed, and it is determined whether or not the wire rope has reached the end of its life. The operation ends.

  When the corresponding database file 513a is stored in the storage unit 513 (Yes in step S960), the calculation unit 514 operates based on the operation index data registered in the operation index table 504a and the database file 513a. In the crane control device 500 that has transmitted the table 504a, it is determined whether or not the wire rope has reached the end of its life (step S970). When it is determined that the wire rope has not reached the end of life (No in step S980), no further operation is performed, and the operation of determining whether the wire rope has reached the end of life ends. In addition, when there are a plurality of corresponding database files 513a, if any one of the database files 513a determines that the wire rope has reached the end of its life, the calculation unit 514 indicates that the wire rope has reached the end of its life. judge.

When it is determined that the wire rope has reached the end of life (Yes in step S980), the calculation unit 514 notifies the warning that the wire rope has reached the end of life in the crane control device 500 that has transmitted the operation index table 504a. Is displayed on the display unit 512 (step S990).
Next, the operation of the wire rope management system (operation for confirming the remaining life of the wire rope) will be described in order along the flowchart shown in FIG.

The calculation unit 514 receives an operation of starting confirmation of the remaining life of the wire rope by the user, and displays a data input screen for obtaining crane data, wire rope data, and operation index type data on the display unit 512 (step S1000). .
The calculation unit 514 searches the storage unit 513 to search for a database file 513a that includes the data input by the operation unit 511 in the file header (step S1010). As a result of the search, if the corresponding database file 513a is not stored in the storage unit 513, a data input screen for requesting input of crane data and wire rope data is displayed again.

The calculation unit 514 causes the display unit 512 to display a data input screen for requesting input of the contents of the database file 513a and operation index data (step S1020).
FIG. 11 is a diagram illustrating an example of a screen displayed on the display unit 512 when the corresponding database file 513 a is stored in the storage unit 513.
As shown in FIG. 11, the display content includes the type of wire rope (for example, crane model number HM350T), crane type (for example, wire rope model number W400), operation index type (for example, the number of suspensions), and extension. A graph with an approximate rate line and an extension rate standard line drawn (for example, a graph with the number of suspensions on the horizontal axis and an elongation rate on the vertical axis), and a graph plotting residual strength data (for example, the number of suspensions on the horizontal axis) , A graph with the residual strength data on the vertical axis), an expansion rate standard linear expression (for example, y = aX + b), a blank for requesting input of operation index data, and an icon for instructing calculation of the remaining life (for example, “calculation”) Icon).

The calculation unit 514 calculates the remaining life of the wire rope based on the input operation index data and the corresponding database file 513a, and displays the calculated remaining life of the wire rope on the display unit 512 (step S1030). Here, the remaining life is the number of remaining suspensions, the remaining suspension load, or the remaining time.
As described above, according to the present embodiment, the database file 320a as a reference for determining the life of the wire rope is created based on the operation index data, the elongation rate data obtained by the tensile test, and the residual strength data, Whether or not the wire rope has reached the end of its life is determined based on the operation index data collected by the crane control device 500 and the database file 513a already stored in the life determination device. Therefore, the lifespan of the wire rope is calculated based on data that does not require skill in data collection, such as elongation rate data and residual strength data, and whether the wire rope has reached the end of life based on easily collectable data such as operation index data. Therefore, the wire rope management system of the present embodiment can realize a wire rope management system that can easily determine whether or not the wire rope has reached the end of its life.

  Further, according to the present embodiment, the operation index data when the elongation rate data reaches the elongation rate reference or the remaining strength data reaches the remaining strength reference is set as the life of the wire rope. Therefore, by monitoring the residual strength data, it is possible to predict when the elongation rate data starts to change suddenly, so the wire rope management system of the present embodiment calculates the life of the wire rope with high accuracy. Wire rope management system can be realized. In other words, the residual strength draws a curve that gradually decreases as shown in the graph of FIG. 12 with the rate of change of the residual strength on the vertical axis and the number of bending cycles on the horizontal axis. Therefore, calculating the life of the wire rope taking into account not only the elongation rate but also the residual strength is important for determining the life of the wire rope with high accuracy. It is connected.

Further, according to the present embodiment, since the elongation rate standard line obtained by translating the approximate line by 3σ is used, the life of the wire rope is determined in consideration of the variation in data. The wire rope management system can realize a wire rope management system that can reliably determine whether or not the wire rope has reached the end of its life.
Further, according to the present embodiment, when creating the database file 513a as a reference for determining the life of the wire rope, the data variation is input, and the data variation affects the determination of the wire rope life. Therefore, the life of the wire rope can be changed depending on whether the damage caused by the breakage of the wire rope is large or not, such as when it is directly connected to a human disaster or when equipment damage is large. The wire rope management system can realize a wire rope management system that makes it possible to determine the life of the wire rope according to the use situation.

Moreover, according to this Embodiment, according to the input of the operation index data of the wire rope currently used, the remaining lifetime of the wire rope is calculated. Therefore, the wire rope management system of this Embodiment can implement | achieve the wire rope management system which can estimate easily the lifetime arrival time of a wire rope.
In the present embodiment, the crane control device 500 collects the operation index data of the wire rope used in the crane, and the life determination device determines that the wire rope has reached the end of its life based on the collected operation index data. It was decided whether or not it was. However, instead of the crane control device 500, the crane user collects the operation index data of the wire rope used in the crane, inputs the operation index data to the life determination device, and the life determination device is the crane user. Whether or not the wire rope has reached the end of its life may be determined based on the operation index data input by.

In the present embodiment, the determination result as to whether or not the wire rope has reached the end of life or the remaining life of the wire rope is displayed on the display unit. However, the life determination device may include an audio output unit such as a microphone, and the life determination device may output the determination result as to whether or not the wire rope has reached the end of life or the remaining life of the wire rope by sound.
Further, in the present embodiment, the database file 320a used as a reference for determining the life of the wire rope is created based on the elongation rate data and the residual strength data collected to create the database file 320a. However, a wire rope that has been determined to have reached the end of its life by a life determination device is subjected to a tensile test, and elongation rate data and residual strength data are collected, and that data is added to the data collected to create the database file 320a. The database file 320a may be created. This makes it possible to obtain a more accurate wire rope life.

  INDUSTRIAL APPLICABILITY The present invention can be used in a wire rope management system, and in particular, can be used in a wire rope management system that determines whether or not a wire rope used in a crane has reached the end of its life.

It is a flowchart which shows the general flow of the lifetime determination of the wire rope in embodiment of this invention. (A) It is an external view of a wire rope. (B) It is the side view and sectional drawing of a wire rope. It is a figure which shows an example of the graph by which the expansion-ratio standard line was drawn. It is a system block diagram which shows the use condition of the wire rope management system in the embodiment. It is a functional block diagram of the wire rope management system in the embodiment. It is a schematic diagram which shows an example of the operation parameter | index table 504a. It is a schematic diagram which shows an example of the database file 513a. It is a flowchart which shows the operation | movement (operation | movement of database file 513a creation) of the wire rope management system in the embodiment. It is a flowchart which shows operation | movement (operation of determination whether the wire rope has reached the lifetime) of the wire rope management system in the embodiment. It is a flowchart which shows the operation | movement (operation of confirmation of the remaining life of a wire rope) of the wire rope management system in the embodiment. 6 is a diagram illustrating an example of a screen displayed on a display unit 512 when a database file 513a is stored in a storage unit 513 as a result of a search by a calculation unit 514. FIG. It is a graph which shows the change of the residual strength with respect to the change of the number of bending cycles.

Explanation of symbols

200 Core wires 210, 210a, 210b, 210c, 210d, 210e, 210f Strand 220 Strand 230 Core wires 400a, 400b, 400c, 500 Crane control device 410, 510 Life determination device 420, 520 Electric communication line 501, 511 Operation unit 502 DESCRIPTION OF SYMBOLS 512 Display part 503 Detection part 504, 513 Memory | storage part 504a Operation index table 505 Accumulation part 505a Table creation part 506 Transmission part 513a Database file 514 Calculation part 514a Life judgment criterion creation part 515 Reception part

Claims (14)

A wire rope management system for determining whether or not a wire rope used in a crane has reached the end of its life,
A life calculation means for obtaining a combination of operation index data indicating the degree of operation of the crane in the past, wire rope elongation rate data and residual strength data at the time of the operation, and calculating the life of the wire rope based on the combination; ,
The operation index data of the crane in operation and the life of the wire rope calculated by the life calculation means are acquired, and whether or not the wire rope has reached the life based on the operation index data and the life of the wire rope. A life judging means for judging;
A wire rope management system comprising: display means for displaying a result of determining the life of the wire rope. The life calculation means calculates the life of the wire rope using the approximate line representing the relationship between the operation index calculated from the combination of the acquired data and the elongation rate, and the residual strength data,
The life judging means judges whether or not the wire rope has reached the end of life based on whether or not the acquired operation index data of the crane in operation exceeds the life calculated by the life calculating means. The wire rope management system according to claim 1. The life of the wire rope is the first operation index that reaches the elongation rate of the wire rope that is prohibited by the crane safety standards and crane construction standards, and the crane safety regulations and the crane construction standards. The wire rope management system according to claim 2, wherein the second operation index reaching the remaining strength of the wire rope is set to a smaller operation index. The life of the wire rope is a safety rule such as a crane, a first operation index in which the elongation rate of the wire rope prohibited to be used according to the crane structural standard falls within the range of variation in the elongation rate data, a safety law such as a crane, The wire rope management system according to claim 2, wherein the second operation index reaching the residual strength of the wire rope whose use is prohibited by the structural standard is the smaller operation index. The wire rope management system further includes:
The wire rope management system according to claim 4, further comprising variation setting means for setting the variation. The wire rope is used in a plurality of cranes having different use conditions,
The lifetime calculation means calculates the lifetime of the wire rope for each crane,
The wire rope management system further includes:
Database file creating means for creating a database file including crane data for identifying a crane from the plurality of cranes, and a life of the wire rope in the crane identified by the crane data;
Storage means for storing the database file,
The life judging means searches a database file based on the crane data, and judges whether the wire rope has reached the life based on the life of the wire rope included in the corresponding database file. The wire rope management system according to any one of claims 1 to 5. There are multiple types of wire ropes,
The plurality of types of wire ropes are used in a plurality of cranes having different use conditions,
The lifetime calculation means calculates the lifetime of the wire rope for each combination of crane and wire rope,
The wire rope management system further includes:
A database file including crane data for identifying a crane from the plurality of cranes, wire rope data for identifying a wire rope from the plurality of types of wire ropes, and a life of a wire rope in a combination of the crane data and the wire rope data. A database file creation means to create;
Storage means for storing the database file,
The life determination means searches a database file based on the crane data and wire rope data, and determines whether the wire rope has reached the life based on the life of the wire rope included in the corresponding database file. The wire rope management system according to any one of claims 1 to 5. There are a plurality of types of wire ropes and operation indicators,
The plurality of types of wire ropes are used in a plurality of cranes having different use conditions,
The lifetime calculation means calculates the lifetime of the wire rope for each combination of crane, wire rope and operation index,
The wire rope management system further includes:
Crane data for identifying a crane from the plurality of cranes, wire rope data for identifying a wire rope from the plurality of types of wire ropes, operation index type data for identifying an operation index from the plurality of types of operation indexes, and the crane Database file creation means for creating a database file including the life of the wire rope in the combination of data, wire rope data and operation index;
Storage means for storing the database file,
The life judging means searches a database file based on the crane data, wire rope data, and operation index type data, and whether the wire rope has reached the life based on the life of the wire rope included in the corresponding database file. The wire rope management system according to any one of claims 1 to 5, wherein it is determined whether or not. The wire rope management system according to claim 8, wherein the operation index is a suspension count, a suspension load, or a usage time. The wire rope management system further includes:
A remaining life calculating means for calculating the remaining life of the wire rope based on the operation index data of the crane input to calculate the remaining life of the wire rope and the life of the wire rope;
The wire rope management system according to any one of claims 1 to 9, wherein the display means includes a remaining life display means for displaying a remaining life of the wire rope. The wire rope management system further includes:
The wire rope management system according to any one of claims 1 to 10, further comprising voice output means for outputting the life determination result of the wire rope by voice. The wire rope management system further includes:
Detecting means for detecting an operation index of the crane;
The wire rope management system according to any one of claims 1 to 11, further comprising data generation means for generating operation index data from the operation index detected by the detection means. A service life determination method for determining whether or not a wire rope used in a crane has reached the service life,
A life calculation step of obtaining a combination of operation index data indicating the degree of operation of the crane in the past, wire rope elongation rate data and residual strength data at the time of the operation, and calculating the life of the wire rope based on the combination; ,
Obtain the operation index data of the crane in operation and the life of the wire rope calculated in the life calculation step, and determine whether the wire rope has reached the life based on the operation index data and the life of the wire rope. A life determination step for determining;
A display step for displaying a determination result of the life of the wire rope. A program for a wire rope management system,
The life determination program which makes a computer function as a means in the system of any one of Claims 1-12.

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