JP2010117912A - Recording device and method of controlling recording device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a recording device allowing a user to efficiently input operation records. <P>SOLUTION: The operation record input device 1 includes an operation part 4 for inputting data on content of an operation performed to each facility in a production line so as to maintain a normal operation state of the production line, and records the operation content data input through the operation part 4. The operation record input device 1 further includes: a failure rate function calculation part 22 and failure rate calculation part 23 for calculating a failure rate that is the occurrence ratio of failure in each facility; and an allocation display instruction part 25 for outputting support information for supporting input of the operation content information. The allocation display instruction part 25 preferentially outputs button setting information 132 for supporting input of operation content data for a failure high in the failure rate calculated by the failure rate function calculation part 22 and the failure rate calculation part 23. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a recording apparatus that records work content information indicating the content of work performed on each facility in a production line in order to maintain a normal operation state of the production line.

  In order to investigate the causes of problems that have occurred in the manufacturing process from the past, failure conditions of each facility, product quality characteristics, etc., occurrence phenomena in the production line, measures against failures, periodic work, changes in operating conditions settings, parts The work history in the production line such as replacement is recorded in association with the time of occurrence and the place of occurrence (target equipment). Such a record is called a so-called work record and is recorded by a worker on the manufacturing site.

  Usually, the work record is not digitized and is written by a worker by hand. If the work record is not digitized in this way, it is difficult to find desired information from a huge work record. In addition, when recording a work record during work, it becomes a fragmentary record due to work, or when it is recorded collectively after work, the work contents cannot be accurately recalled and the record is incorrect. It will become. That is, the reliability of the information recorded in the work record is low.

  Further, when handwritten work records are digitized later, it is necessary for an operator to input them into a computer or the like, and the work of inputting the work records to the computer is very troublesome.

  For this reason, it is preferable that the work record be input to a computer or the like during the work and used as information digitized from the beginning. However, since various kinds of work occur on the production line, it takes time and effort for the worker to specify the work to be recorded on the input screen, resulting in a reduction in the work efficiency of the worker. Therefore, it is necessary to reduce the burden on the work record input work of the worker.

  For example, Patent Literature 1 or 3 discloses a technical idea that allows a cause of failure to be selected from options on an input screen. In particular, Patent Document 1 discloses a user interface method that can dynamically change the display position of a selection menu based on the frequency of past execution patterns and business patterns when a work record is input by a worker. In this user interface method, the frequency of the above execution pattern and business pattern can be calculated for the latest one, or for a specific time and a specific day of the week, facilitating menu selection on the input screen. can do.

In addition, for example, in Patent Document 2, an empirical probability, that is, an occurrence frequency is obtained from a past selection operation history for a selection operation, a probability model is created, and a selection item display that determines a priority order so that a user's workload is reduced. A system is disclosed.
Japanese Patent Laid-Open No. 7-182128 (published July 21, 1995) JP-A-8-76955 (published on March 22, 1996) JP 2000-259222 A (published on September 22, 2000) JP 2003-99501 A (published April 4, 2003)

  However, in the above conventional configuration, there is a problem that it is impossible to assign work contents with a high probability of input to an input button for inputting work records.

  Specifically, it is known that the failure rate occurring in each facility in the production line follows a so-called bathtub curve shown in FIG. By the way, the prior art is configured to determine the display of the selection menu based on the frequency of past work.

  Thus, in the configuration in which the display of the selection menu is determined based on the occurrence frequency, for example, even if the failure rate of the equipment shown in FIG. May be assigned as a selection menu based on the frequency of occurrence of a high failure rate during the initial failure period. On the other hand, even if the work is in the friction failure period shown in FIG. 24 and has a high occurrence frequency, it may not be assigned to the selection menu based on the occurrence frequency of the low failure rate in the accidental failure period before the wear failure period. .

  Therefore, in the conventional configuration described above, it is not possible to assign the work contents of the work having a high probability of input to the input button for inputting the work record, and therefore it is not possible to efficiently input the work record. Arise.

  The present invention has been made in view of the above problems, and an object thereof is to realize a recording apparatus and a recording apparatus control method capable of efficiently inputting work records.

  In order to solve the above-described problem, the recording apparatus according to the present invention records work content information indicating the content of work performed on each facility in the production line in order to maintain a normal operation state of the production line. A recording device for inputting the work content information; a recording means for recording the work content information input by the input means; and a history of the work content information recorded by the recording means. Based on the work history information, a failure rate calculating means for calculating a failure rate, which is a probability that a failure occurs in the equipment at a predetermined timing, is calculated, and the work content information in the input means Output means for outputting support information for supporting input, and the output means has a failure rate according to the failure rate calculated by the failure rate calculation means. And outputting preferentially the support information to support the input of the operation content information of the work to have failed carried out to deal with.

  According to the configuration described above, since the failure rate calculation means is provided, it is possible to obtain the probability of occurrence of failure in the equipment at an arbitrary timing. In addition, since the output unit is provided, it is possible to preferentially output support information that supports input of work content information of work for a failure with a high failure rate.

  By the way, the support information is information for supporting the user to efficiently perform an operation of inputting specific work content information in the input means. For example, the support information is specified by pressing a specific button. For example, information that allows the work content information to be input, information that the work content information is represented in a list format, and the like are listed as input candidates.

  The recording apparatus according to the present invention can preferentially output support information for supporting input of the work content information by the input means regarding a failure having a high failure rate. For this reason, it is possible to provide support information that supports the input of the work content information of this work with high probability at the time of work on the facility in which the failure has occurred.

  Therefore, the recording apparatus according to the present invention has an effect that work records can be input efficiently.

  In the recording apparatus according to the present invention, in the configuration described above, the input unit has a predetermined number of buttons for inputting the work content information, and the failure rate calculated by the failure rate calculation unit is high. Prioritizing work content information of work performed in response to a failure, further comprising an association means for associating the work content information with the button, and the output means includes the button and the work content associated with the association means. A correspondence relationship with the information may be output as the support information.

  According to the configuration described above, work content information with a high failure rate can be associated with the buttons provided in the input means, and the corresponding relationship can be output as support information. For this reason, when the work content information is input, the work content information that is likely to be input can be preferentially assigned to each button, and the corresponding support information can be output by pressing the button.

  In this way, work content information that is highly likely to be input can be preferentially assigned to a button and corresponding support information can be output, so that the user can efficiently input work content information with reference to this support information. Can be done well.

  The recording apparatus according to the present invention includes an ordering unit configured to perform ordering so that work contents information of work performed in response to a failure with a high failure rate calculated by the failure rate calculation unit in the above-described configuration is higher in the list. Further, the output unit may be configured to output a list of work content information ordered by the ordering unit as the support information.

  According to the above-described configuration, since the ordering unit is provided, the work content information can be ordered so that the failure rate is higher in the list in the descending order. Further, since the output means outputs the ordered list of work content information, the work content information to be input by the user can be selected with reference to the output list. In this list, work contents for dealing with a failure with a high failure rate are preferentially ordered in a higher order. That is, it is possible to output a list in which work content information that is highly likely to be input at the time of input is ordered in the higher order. For this reason, the user can efficiently input the work content information with reference to the support information.

  In the recording apparatus according to the present invention, in the configuration described above, the work content information includes a predetermined work item, and the failure rate calculation means has a work content for the specified work item based on the work history information. Summarize the failure rate of failures dealt with by work of common work content information, find the failure rate of work content information group that is a set of work content information with common work content for the specified work item, and output the above The means is configured to preferentially output support information that supports input of the work content information group having a high failure rate in accordance with the failure rate of the work content information group calculated by the failure rate calculation means. It may be.

  According to the above configuration, the failure rate calculation means calculates the failure rate of the failure that was dealt with by the work content information work that has the same work content for the specified work item. Can be calculated. For this reason, even when there are many types of work for equipment on the production line, the output means can provide support information by putting together work content information having common work items to some extent.

  Therefore, it is possible to prevent the support information from becoming complicated due to many types of work.

  In the recording apparatus according to the present invention, in the configuration described above, the input unit has a predetermined number of buttons for inputting the contents of the work, and the failure rate calculated by the failure rate calculation unit is high. The information processing apparatus further includes an association unit that prioritizes the work content information group and associates the button with the button, and the output unit uses a correspondence relationship between the button and the work content information group associated with the association unit as the support information. It may be configured to output.

  According to the configuration described above, it is possible to associate a work content information group having a high failure rate with a button provided in the input means, and output the correspondence as support information. For this reason, it is possible to preferentially assign a work content information group that is likely to be required when inputting work content information to each button and output corresponding support information.

  In this way, work content information groups that have a high possibility of being input can be preferentially assigned to buttons, and the corresponding support information can be output. Therefore, when the work content information is input, the user is supported by the support information. By pressing the attached button, it is possible to efficiently input work content information including common work items.

  As described above, work content information including a common work item can be easily input by pressing a button. Therefore, the user only needs to newly input a work item that is not common, and efficiently inputs the work content information. be able to.

  The recording apparatus according to the present invention further includes an ordering unit configured to perform ordering from the work content information of work performed in response to a failure with a high failure rate calculated by the failure rate calculation unit in the configuration described above. The output means orders the work contents common to the work content information group having the highest failure rate obtained by the failure rate calculation means and work contents included in work items other than the designated work item. A list arranged in accordance with the ordering by the means may be combined and output as support information.

  According to the configuration described above, the output means can output the work content information group having the highest failure rate for the work content of the designated work item, that is, the common work content.

  Further, since the ordering unit is provided, the ordering can be performed in order from the work content information with the highest failure rate. Therefore, the work contents of the work items other than the designated work item can be expressed in a list format in the order of higher failure rate by the combination with the common work contents.

  In this way, by pressing the button, it is possible to easily input the common work item portion of the work content information group having the highest failure rate, and output the non-common work items in a list in the order of increasing failure rate. can do. In other words, work contents of work items that are not common can be represented in a list in the order in which the work contents are likely to be input, so that work content information can be input efficiently.

  In the recording apparatus according to the present invention, in the configuration described above, the failure rate calculation unit adds the failure rate of the failure to be dealt with by the work content information in which the work content of the specified work item is common, thereby obtaining the work content. You may be comprised so that the failure rate of an information group may be calculated | required.

  That is, in the recording apparatus according to the present embodiment, when calculating the failure rate of the work content information group, a so-called serial system that adds up the failure rates of failures to be dealt with in each work of the work content information grouped together It can ask for.

  In the recording apparatus according to the present invention, in the above configuration, the failure rate calculation means is preferably configured to calculate a failure rate using a probability density function of a Weibull distribution.

  According to the above configuration, since the failure rate is calculated using the probability density function of the Weibull distribution, the failure rate can be obtained by statistically treating the deterioration phenomenon of the equipment with respect to time or the life.

  In the recording apparatus according to the present invention, in the above-described configuration, when the time interval at which the failure occurs at the predetermined timing is obtained and there is censored data that is data with an uncertain time interval, the failure rate The calculating means is preferably configured to calculate a failure rate using a cumulative hazard function.

In the recording apparatus according to the present invention, in the configuration described above, the failure rate calculation means calculates a shape parameter and a scale parameter that are failure rate functions in the probability density function of the Weibull distribution used to calculate the failure rate. A failure rate function calculating means for performing the failure rate function, wherein m is the shape parameter as the failure rate function, η is the scale parameter, F (t) is a failure distribution function indicating the probability of failure by a predetermined time t, Assuming that the reliability function obtained from the function F (t) is 1-F (t) = exp [− (t / η) ^m ], the failure rate function calculating means 1−F (t) = exp [− The log (log (1 / (1-F (t)))) on the left side obtained by taking the natural logarithm of both sides of (t / η) ^m ] as 2 degrees is the objective variable y, and mlog (t) −mlog ( log (t) in η) When the degree of conformity between the failure rate function and the observed value is determined based on the regression coefficient obtained from the relationship between the explanatory variable x and the objective variable y as the number x, and the degree of conformance does not satisfy the predetermined value, The start point of data collection in the history information may be updated.

  According to the configuration described above, the failure rate function calculating means determines the degree of matching between the failure rate function and the observed value based on the determination coefficient of regression analysis, and when the degree of matching does not satisfy the predetermined value, The data collection start time can be updated. For this reason, it is possible to obtain a failure rate function that reflects the latest equipment state (failure mode) and compensates for a certain prediction accuracy.

  The recording apparatus according to the present invention, in the above-described configuration, has a failure period determination unit that determines, based on the shape parameter, whether or not there is a facility in a wear failure period in which a failure rate increases with time as a function of secular change, and the failure When the period determining means determines that there is equipment in the wear-out failure period, it is preferably configured to include notification means for notifying the equipment in the wear-out failure period.

  According to the configuration described above, since the failure period determination means and the notification means are provided, it is possible to notify in advance the equipment in the wear failure period. For this reason, the user can prevent the occurrence of a situation where the production line is stopped for a long period of time by performing maintenance and inspection on the notified equipment or preparing replacement parts in advance. be able to.

  In order to solve the above-described problems, the recording apparatus control method according to the present invention is a work content indicating the content of work performed on each facility in the production line in order to maintain a normal operation state of the production line. A method of controlling a recording apparatus for recording information, the input step for inputting the work content information, the recording step for recording the work content information input in the input step, and the work recorded in the recording step A failure rate calculation step for obtaining an interval at which a failure occurs in the facility based on work history information that is a history of content information, and calculating a failure rate that is a probability that the facility will fail at a predetermined timing, and the input step An output step of outputting support information for supporting the input of the work content information at the output step, and in the output step, the failure According to the calculated failure rate in calculation step, characterized in that it preferentially outputs the support information failure rate to support the input of the operation content information of the work carried out to deal with high fault.

  According to the method described above, since the failure rate calculation step is included, it is possible to obtain the failure occurrence probability in the equipment at an arbitrary timing. And since the said output step is included, the support information which assists the input of the work content information of the work with respect to a failure with a high failure rate can be output preferentially.

  By the way, the support information is information for assisting the user to efficiently perform an operation of inputting specific work content information in the input step. For example, the support information is specified by pressing a specific button. For example, information that allows the work content information to be input, and information that represents the work content information in a list format as input candidates may be used.

  In the control method of the recording apparatus according to the present invention, support information for supporting the input of the work content information in the input step can be output preferentially for a failure with a high failure rate. For this reason, it is possible to provide support information that supports the input of the work content information of this work with high probability at the time of work on the facility in which the failure has occurred.

  Therefore, the control method of the recording apparatus according to the present invention has an effect that work records can be input efficiently.

  As described above, the recording apparatus according to the present invention is a recording apparatus that records work content information indicating the content of work performed on each facility in the production line in order to maintain a normal operation state of the production line. In addition, an input means for inputting the work content information, a recording means for recording the work content information input by the input means, and work history information which is a history of the work content information recorded by the recording means. Based on this, a failure rate calculating means for calculating a failure rate, which is a probability that a failure occurs in the equipment at a predetermined timing, and an input of the work content information in the input means are obtained. Output means for outputting support information, and the output means copes with a failure with a high failure rate according to the failure rate calculated by the failure rate calculation means. And outputting preferentially the support information to support the input of the operation content information of the work performed.

  Therefore, the recording apparatus according to the present invention has an effect that work records can be input efficiently.

  As described above, the control method of the recording apparatus according to the present invention is a process of performing operations performed on each facility in the production line in order to maintain the normal operation state of the production line in order to solve the above-described problems. A control method of a recording apparatus for recording work content information indicating content, wherein an input step for inputting the work content information, a recording step for recording the work content information input in the input step, and the recording step A failure rate calculation step for obtaining an interval at which a failure occurs in the equipment based on the work history information that is a history of the recorded work content information, and calculating a failure rate that is a probability that the facility will fail at a predetermined timing And an output step for outputting support information for assisting the input of the work content information in the input step, the output step Is characterized in that, according to the failure rate calculated in the failure rate calculation step, the support information that supports the input of the work content information of the work performed in response to a failure with a high failure rate is preferentially output. .

  Therefore, the control method of the recording apparatus according to the present invention has an effect that work records can be input efficiently.

  An embodiment of the present invention will be described below with reference to FIGS. In other words, the work record input device 1 according to the present embodiment is for recording information on general work necessary for producing products on a production line that operates fully automatically. In particular, the work that needs to be performed with the production line temporarily stopped, that is, the non-working factor work is recorded. Note that. Information of the work content of the non-working factor work recorded is referred to as work content data 130.

(Configuration of work record input device)
As shown in FIG. 1, the work record input device 1 includes a main control unit 2, a storage device 3 for storing information necessary for arithmetic processing by the main control unit 2, and an operation for receiving an input instruction from a worker (user). The unit (input means) 4 and the display unit 5 are provided. FIG. 1 is a block diagram illustrating a schematic configuration of a work record input apparatus 1 according to an embodiment of the present invention.

  The storage device 3 stores a work recording unit 30 and a life data DB 31 and can be realized by a memory, a hard disk, or the like.

  The work recording unit 30 includes a work record DB (work history information) 131 and button setting information (support information) 132. The work record DB 131 is a database that manages work content data (work content information) 130 including information on work items in each work in order of work start time.

  As shown in FIG. 2, the work content data 130 includes, for each work performed by a worker, as a work start time (work start time) and work items constituting the work content, for example, the type of work performed ( Work type), the equipment (equipment) that is the target of the work, the phenomenon (phenomenon) that occurred, and the cause (cause) that caused the phenomenon. The worker records the work content data 130 in the work record DB 131 by operating the operation unit 4. FIG. 2 is a diagram illustrating an example of the work content data 130 according to the embodiment of the present invention.

  The button setting information 132 is table information indicating the correspondence between buttons (function keys shown in FIG. 9 described later) and work items in the work content data 130. When a worker (user) presses a button when inputting a work, the button setting information 132 is referred to, and the work item corresponding to the pressed button and the work start time are recorded in the work record DB 131.

  The work start time may be keyed by the worker, or may be obtained from the button press timing. The actual button setting information 132 is a correspondence table of buttons and work items that are prioritized in descending order of failure rate in the button allocation unit 24 described later.

  The life data DB 31 is a database of life data 331 collected and created by the main control unit 2 from the work content data 130 managed in the work record DB 131. The lifetime data 331 is data indicating the operating time from the previous failure occurrence time to the current failure occurrence time as the lifetime of each facility in each work. That is, the interval at which a failure occurs in the facility.

  The lifetime data 331 is obtained by further adding the calculation results calculated by the failure rate function calculation unit 22 and the failure rate calculation unit 23 described later to the information indicating the time from the previous failure occurrence time to the current failure occurrence time. Go.

  By the way, it is assumed that, in a certain data collection period, as shown in FIG. In this case, for the second to eighth periods, the period from the previous failure occurrence to the current failure occurrence can be obtained, but for the first and ninth cases, this period cannot be obtained. It becomes complete lifetime data 331. When the information about the failure rate is updated at a certain time interval, such incomplete life data 331 is inevitably generated. FIG. 3 shows an embodiment of the present invention and is a diagram showing an example of a failure occurrence state in an arbitrary data collection period.

  The work record input device 1 according to the present embodiment is configured to distinguish this incomplete life data 331 from other life data 331 as censored data. Contrary to the censored data, life data that can determine the period from the previous failure occurrence to the current failure occurrence is referred to as complete data.

  The operation unit 4 receives an operation instruction input from an operator, and can be realized by an input means such as a touch panel including a function key and a numeric keypad, or a keyboard.

  The display unit 5 is for performing a warning display described later, and can be realized by, for example, an LCD, a CRT display, an organic EL display, or the like.

  The main control unit 2 is for performing various controls of each unit included in the work record input device 1, and includes, as functional blocks, a life data creation unit 21, a failure rate function calculation unit (failure rate calculation means / failure rate function calculation). Means) 22, failure rate calculation section (failure rate calculation means / failure period determination means) 23, button assignment section (association means / ordering means) 24, assignment display instruction section (output means) 25, warning display instruction section (notification means) ) 26 and a recording unit (recording means) 27. When the main control unit 2 is realized by a CPU, for example, these functional blocks can be realized by reading and executing a program stored in a ROM (not shown) or the like by the CPU. The failure rate function calculation unit 22 and the failure rate calculation unit 23 implement the failure rate calculation means of the present invention.

  Below, each part which can be implement | achieved as these functional blocks is demonstrated.

  The life data creation unit 21 acquires work content data 130 from the work record DB 131 recorded in the work recording unit 30 and collects life data 331 for each work. The lifetime data 331 collected by the lifetime data creation unit 21 is as shown in FIG. FIG. 4 shows an embodiment of the present invention and is a diagram showing an example of the lifetime data 331.

In other words, life data 331, for each task (Fig. 4, the N tasks), and that work start time in the order of lifetime T _i, work type, facilities, events, and cause of the relationship was shown . In FIG. 4, “i” in the life data 331 is a counter indicating the order when the life time is sorted in ascending order, “T _i ” is the life time, and “δ _i ” is a censoring flag indicating the presence or absence of censoring data. , “J” respectively indicate counters in order of work occurrence time.

  Details of the life data collection process by the life data creation unit 21 will be described later.

  The failure rate function calculation unit 22 calculates the failure rate functions m (shape parameter) and η (scale parameter) from the lifetime data collected by the lifetime data creation unit 21. Here, the functions m and η to be obtained will be described.

  The bathtub curve indicating the failure rate of each facility can be generally expressed using a Weibull distribution function. That is, assuming that the Weibull coefficient (shape parameter) is m and the scale parameter is η, the probability of failure by time t can be expressed by the failure distribution function F (t) in Equation (1). In addition, the reliability function R (t) indicating the probability of not failing for t hours or more is expressed by Equation (2), and the probability density function f (t) of the Weibull distribution can be expressed by Equation (3). Therefore, the failure rate λ (t) indicating the failure rate within the unit time is expressed by Equation (4). Therefore, if the values of m and η are known, the failure rate for each work at time t can be known. When m = 1, λ (t) = 1 / η and does not depend on t. That is, when m = 1, the accidental failure period in the bathtub curve is indicated. For m> 1, λ (t) increases with time, indicating a wear failure period in the bathtub curve, and for m <1, λ (t) decreases with time, reducing the initial failure period in the bathtub curve. Will be shown.

  Here, when the natural logarithm of both sides of the formula (2) is 2 degrees, the following formula (5) is obtained, which can be represented by a straight line Y = mX + B.

  Therefore, when the observed value is plotted on the Weibull probability paper, m can be obtained from the inclination of the Weibull probability paper. On the other hand, when Y = 0 in Equation (5), 0 = m (lnt−lnη) and t = η. Therefore, η can be obtained from t when Y = 0.

  In the above description, the failure rate functions m and η are calculated without considering the censor data. However, since the work content data 130 recorded in the work record DB 131 actually includes censor data, It is necessary to obtain the failure rate functions m and η by reflecting the influence of the censored data on the failure rate.

  Specifically, the probability of failure by time t can be shown from the distribution function shown in the following formula (6).

  That is, assuming that the failure distribution follows the Weibull distribution, the cumulative hazard method is used in which the parameters of the Weibull distribution are estimated from the result of the life test and F (t), f (t), and λ (t) are obtained.

  The cumulative hazard function H (t) in this cumulative hazard method can be expressed as Equation (7). The cumulative hazard function H (t) and the distribution function F (t) have a one-to-one relationship, and H (t) may be estimated in order to obtain F (t). In other words, if H (t) is obtained, F (t) can be obtained naturally.

The method for obtaining H (t) can be obtained by using Equation (8) which is an approximate expression. In this equation (8), δ _j = 1 for complete data and δ _j = 0 for censored data. From this equation, F (t) can be approximated as shown in Equation (9). Here, “^” added to H and F in the equations (8), (9), etc. indicates an estimated value. In the specification, symbols indicated as “H ^” and “F ^” also indicate estimated values.

Further, when m and η are obtained, as described above, the natural logarithm of both sides (1-F (t) = exp [− (t / η) ^m ]) of the reliability function R (t) expressed by Equation (2). And log (log (1 / 1-F (t))) on the left side is the objective variable y, and log (t) in mlog (t) -mlog (η) on the right side is the explanatory variable x, mlog ( If η) is set to B, a linear regression model is represented by a straight line y = mx + B.

  Then, regression analysis is performed to predict the objective variable y from the explanatory variable x. If the regression slope is β and the intercept is α, they can be approximated by equations (10) and (11), respectively. Note that the regression slope is β, the intercept is α, and the failure rate functions m and η are m = β and η = exp (−α / m), respectively.

Further, the failure rate function calculation unit 22 uses the regression determination coefficient R ² for the obtained failure rate functions m and η to determine whether or not the fit to the model is good. If the fit is bad, start data collection. Process to change points.

In addition, a regression analysis was performed, and the coefficient of determination (square of correlation: R ² ) indicating the degree of fit to the model was calculated from the relationship shown in Equation (12): R ² = S _R / S _y = (S ² _xy / _{^{S x) / S y = S}} 2 can be obtained with the xy _{/ S} x S _y.

  Details of the failure rate function calculation process by the failure rate function calculation unit 22 will be described later.

  The failure rate calculation unit 23 calculates the population average of the life time using the function obtained by the failure rate function calculation unit 22, and obtains the failure rate when the life time becomes the average. That is, the failure rate of the equipment corresponding to each work changes with time, but the failure rate used for button assignment must be calculated at some timing. Therefore, in the work record input device 1 according to the present embodiment, the failure rate is obtained at the timing when the population life average in the life data for each work is obtained. Further, since the value of the function m is obtained, the failure rate calculation unit 23 determines whether the failure mode is the initial failure period (DFR) in the bathtub curve according to the magnitude of m, or the accidental failure period (CFR). ) Or the friction failure period (IFR).

  Details of the failure rate calculation processing and failure mode determination processing performed by the failure rate calculation unit 23 will be described later.

  The button assignment unit 24 assigns operations to buttons (particularly function keys) in the order in which the failure rate obtained by the failure rate calculation unit 23 increases. For example, when the relationship between each work and the failure rate is as shown in FIG. 5, the button allocation unit 24 has the function keys (F1, F2,...) Of the operation unit 4 in descending order of the failure rate. I will assign it. As shown in FIG. 6, the assigned result is button setting information 132 indicating the correspondence between each function key and the display name representing the work, the type of work, the equipment, the occurrence phenomenon, and the cause. FIG. 5 shows an embodiment of the present invention and is a diagram showing an example of the relationship between each work and the failure rate. FIG. 6 is a diagram illustrating an example of the button setting information 132 according to the embodiment of this invention. The details of the button allocation processing by the button allocation unit 24 will be described later.

  The assignment display instruction unit 25 assigns and displays a work to each function key based on the button setting information 132 stored in the storage device 3. The assignment state of the work to each function key can be displayed on the display unit 5 as shown in FIG. FIG. 7 is a diagram showing an example of a task assignment state to function keys according to the present invention.

  The warning display instructing unit 26 displays a warning indicating a change in the failure mode on the display unit 5 with reference to the life data DB 31 reflecting the determination result of the failure mode determined by the failure rate calculating unit 23. Specifically, as shown in FIG. 8, the warning display instruction unit 26 displays a list of work contents in the failure rate increase mode, that is, the wear failure period (IFR), and makes an announcement for promoting the equipment maintenance. . FIG. 8 shows an embodiment of the present invention and is a diagram showing a warning display example of a failure mode change.

  The list of work contents in the IFR is displayed in the order of work with the highest failure rate, and work that shows an increase in the failure rate is visually displayed, for example, in bold. Work that requires maintenance is clarified. Warning display processing by the warning display instruction unit 26 will be described later.

  The recording unit 27 records contents of work performed by the worker on the facility in the work record DB 131 in accordance with an operation instruction from the operation unit 4. That is, in the work record input device 1 according to the present embodiment, as will be described later, input support information regarding the work contents assigned to the function keys of the operation unit 4 is shown on the work record input screen. Therefore, referring to this input support information, the worker presses the function key to which the work content corresponding to the work being executed is assigned. In response to this press, the recording unit 27 refers to the button setting information 132, reads the work content corresponding to the pressed function key, and records this work content in the work record DB 131.

  Next, a work record input screen of the work record input apparatus 1 having the above-described configuration will be described with reference to FIG. FIG. 9 shows an embodiment of the present invention and is a diagram showing a work record input screen.

(Work record input screen in work record input device)
The work record input screen of the work record input apparatus 1 according to the present embodiment mainly has a main screen 200 and a work content input screen 201 as shown in FIG.

  In the main screen 200, the work content of the work for which work records are to be recorded is recorded by the worker using the work content registration area 202 for displaying the work content assigned to the function key information and the work content input screen 201. And a work record display area 203 for displaying information.

  The work content input screen 201 is a screen that is displayed in response to the function key when the operator presses the function key in the work content registration area 202, and what work content data 130 is input. Whether the screen 201 starts up is determined by referring to the button setting information 132 when the function key is pressed.

  In the work record input apparatus 1 according to the present embodiment, information to be additionally recorded by the worker can be set using the work content input screen 201. That is, in the work content input screen 201, some work items are recorded in advance as the work content data 130, and when information other than the work items is recorded, this information is stored in the remarks column of the work content input screen 201. An operator can input (input step).

  As described above, in the work record input apparatus 1 according to the present embodiment, the work content data 130 can be input from the work content input screen 201 by simply pressing each function key. Furthermore, when there is information to be individually recorded with respect to the input work content data 130, the worker can additionally record using the work content input screen 201. For this reason, when a work occurs, the worker can easily perform recording (recording step) regarding the work.

  By the way, when there are many kinds of work to be input, it is difficult to assign all work to function keys. Therefore, as described above, the work record input device 1 according to the present embodiment can assign work functions that are likely to be required to be assigned to the function keys when the work content data 130 is input. it can. Then, the assigned correspondence can be displayed on the display unit 5.

  As described above, since the work content data 130 that is likely to be input at the time of input can be preferentially assigned to the function keys and the corresponding relationship can be displayed, the worker refers to this display. By pressing a desired function key, the work content data 130 can be recorded efficiently.

  Next, work content assignment determination processing for buttons (function keys) in the work record input device 1 having the above-described configuration will be described with reference to FIG. FIG. 10 shows an embodiment of the present invention and is a flowchart showing work content assignment determination processing.

(Processing assignment determination process for buttons)
First, in the work record input device 1 according to the present embodiment, the life data creation unit 21 acquires the work content data 130 from the work record DB 131 recorded in the work record unit 30, and collects life data 331 for each work. (Step S1, hereinafter referred to as S1).

  When the lifetime data 331 is collected by the lifetime data creation unit 21, the failure rate function calculation unit 22 obtains a failure rate function m (Weibull coefficient) and η (scale parameter) from the lifetime data 331 (S2).

  Next, the failure rate calculation unit 23 uses the functions m and η obtained by the failure rate function calculation unit 22 to calculate the population average of the lifetime, and obtains the failure rate when the lifetime is the average. . Further, based on the value of the function m, the failure rate calculation unit 23 determines whether the failure mode is an initial failure period (DFR) in the bathtub curve or a contingent failure period (CFR) according to the magnitude of m. The failure mode is determined to determine whether the friction failure period (IFR) is present. That is, the failure rate calculation unit 23 performs failure rate calculation processing and failure mode determination processing (S3).

  When the failure rate is calculated by the failure rate calculation unit 23, the button allocation unit 24 allocates work to the buttons in the order of increasing the calculated failure rate (S4).

  Further, the warning display instruction unit 26 displays a warning on the change of the failure mode on the display unit 5 based on the failure mode determined by the failure rate calculation unit 23 (S5).

  As described above, the work record input device 1 according to the present embodiment performs work content assignment determination processing for buttons. Note that the processing procedure of the work content assignment determination process for the button is not limited to this, and the order of the button assignment process shown in step S4 and the warning display process shown in step S5 may be reversed. .

  Hereinafter, a detailed description of each step S1 to step S5 will be given with reference to FIG.

(Life data collection process)
First, the life data collection process will be described with reference to FIG. FIG. 11 is a diagram illustrating an embodiment of the present invention, and is a flowchart for explaining life data collection processing.

  In the work record input apparatus 1 according to the present embodiment, the life data creation unit 21 reads the work content data 130 from the work record DB 131 at the update time T and the update cycle K time (S11). The work content data 130 read by the life data creation unit 21 includes the work start time, work type, equipment, phenomenon, and cause as shown in FIG. 2 as described above. Accordingly, the life data creation unit 21 first classifies the acquired work content data 130 by work content, that is, by work type (S12). Then, the life data creation unit 21 counts the number of pieces of work content data 130 recorded in the work record DB 131 for each work content (S13). It is assumed that the number of work contents data 130 to be collected is N, and the number of work contents data 130 for each work is 1 to n.

  Next, the life data creation unit 21 sorts the work content data 130 classified by work content in order of work start time (S14). The order of the work start times is represented by a variable j (1 ≦ j ≦ n).

  Here, the work content data 130 that has the earliest work start time in the current update, that is, j = 1 is the abort data. In step S15, it is first determined whether j = 1. If j = 1 (in the case of “YES” in step S15), the previous update time T of the work content data 130 and j = 1st work start time are determined. The difference is obtained, and the value is set as the lifetime of j = 1st work content data 130, and an abort flag is added to the work content data 130 (S16).

  On the other hand, in the case of the work content data 130 in which 1 <j <n instead of j = 1 (“NO” in S15 and “YES” in S17), the lifetime data creation unit 21 determines that the jth and j− The lifetime is calculated from the difference in the first work start time (S18). For example, the lifetime of j = 2nd work content data 130 is the difference between j = 2nd start time and j = 1st start time.

  In the case of the work content data 130 in which j = n (“NO” in step S15 and “NO” in S17), that is, the work content data 130 with the latest work start time in this update is also censored data. Therefore, the life data creation unit 21 uses the difference between the last start time, that is, the j = n-th start time and the current update time T as the life time, and adds an abort flag to this work content data (S19). .

  Subsequently, the life data creation unit 21 determines whether or not there is data for which the life time = 0 for the work content data 130 sorted in the order of the work start time (S20). Here, if “YES” in the step S20, the work content data 130 in which the life time = 0 is deleted. Then, with this deletion, the number of pieces of work content data 130 for each work and the work start order are changed, so that n and j assigned to each work content data 130 are updated to reflect this change ( S21).

  Subsequently, in the work record input device 1, the life data creation unit 21 rearranges the work content data 130 so that the life time is in the shortest order for each work (S22), and all the classified work (N pieces). It is determined whether the processing from step S13 to step S22 has been performed (S23). When the processes from step S13 to step S22 described above are performed for all classified tasks (N) ("YES" in S23), the life data collection process ends. The life data 331 generated by the life data collection process has a data structure shown in FIG. 4 as described above. The lifetime data creation unit 21 transmits the generated lifetime data 331 to the failure rate function calculation unit 22 and instructs to calculate the failure rate functions m and η.

(Failure rate function calculation process)
Next, the failure rate function m, η calculation processing (failure rate calculation step) will be described with reference to FIGS. First, with reference to FIG. 12, the flow of processing related to the calculation processing of the failure rate function will be described. FIG. 12 shows an embodiment of the present invention, and is a flowchart showing a failure rate function calculation process.

  When the generated life data 331 is received together with the execution instruction of the failure rate function calculation process from the life data creation unit 21, the failure rate function calculation unit 22 receives the previous life data 331 (that is, the current update data from the life data DB 31). The lifetime data 331) generated at a time that goes back from the time T by the update period K is read (S31). Then, the life data 331 received from the life data creation unit 21 is added to the read last life data 331 (S32).

  In addition, when obtaining the failure rate function, the previous life data 331 is added as described above for the following reason.

  That is, depending on the set update cycle time, the current failure rate may change at the same rate as the previous failure rate, and R can be increased as the number of data increases. Because. As R increases, it becomes difficult to be affected by errors due to sudden abnormal data.

  However, it is not always necessary to add the previous life data 331 as described above, and when the number of the life data 331 received from the life data creation unit 21 is sufficient, the failure rate function m, η may be obtained.

  Next, the failure rate function calculation unit 22 determines whether or not there are W or more pieces of life data 331 as complete data for each work (S33). For example, when the lifetime data 331 is the data shown in FIG. 13, only i = 2, 3, and 5 are complete data, and the coordinates of the complete data on the Weibull probability paper are (ln (ti), ln ln 1 / (1-F ^ (ti))) = (0.92, -1.39), (1.25, -0.55), (2.2, 0.45). The failure rate function calculation unit 22 determines whether this number is W or more.

  On the other hand, when the number of complete data is less than W (“NO” in S33), the failure rate function calculation process is not executed, and the number of complete data for other work contents is confirmed.

When there are W or more complete data (“YES” in step S33), the failure rate function calculation unit 22 calculates F ^ (ti), ln (ti), lnF ^ (ti) (S34). Next, the failure rate function calculation unit 22 sets a variable h as an occurrence time identifier and initializes it to h = 1 (S35). Then, (m, η, R ² ) is calculated from the regression line in the range of h ≦ j ≦ n (S36). For example, when h = 1, a regression line is obtained in the range of 1 ≦ j ≦ n (“j” is a counter in order of work occurrence time and “n” is the number of data of work content data 130 for each work). That is, as shown in FIG. 15 (a), the data collection start start point is assumed to be j = 1st work occurrence time. Next, the failure rate function calculation unit 22 determines whether or not R ^{2 at} this time satisfies R ² ≧ k (S37). If R ² ≧ k is satisfied (“YES” in S37), the calculated m and η are added to the life data 331. The data structure of the lifetime data 331 at this time is as shown in FIG. FIG. 15 is a diagram showing an example of observed values plotted on the Weibull probability paper. FIG. 15A shows a case where j = 1 is used as a data collection start point, and FIG. The case where t-1 is used as the data collection start point is shown.

  Then, it is determined whether the above-described processing from step S33 to S37 has been performed on the lifetime data 331 for all the operations (S38). If “NO” in the step S38, the process returns to the step S33, and the processes after the step S33 are repeated for other work contents. If “YES” in the step S38, the life data 331 satisfying j <h, that is, the life data 331 not used for the failure rate function calculation process is deleted (S39).

  On the other hand, if “NO” in step S37 described above, the failure rate function calculation unit 22 increments the value to be substituted for h (S41), sets j = h + 1, and extracts the life data 331 from h + 1 to n. (S41). Then, the failure rate function calculation unit 22 determines whether there are W or more complete data (S42).

If it is determined that there are W or more complete data (“YES” in S42), the process returns to step S36 and the subsequent processing is repeated. In this way, as shown in FIG. 15 (b), the values of h = 2, 3, 4,... And h are incremented until R ² ≧ k is satisfied, and a regression line is obtained in order, m, η , R ² is calculated. The time when R ² ≧ K is set as the data collection start point. That is, the failure rate function calculation unit 22 obtains a regression line in order from the earliest work start time, and determines whether R ² ≧ k is satisfied. Then, data that does not satisfy R ² ≧ k is deleted, and the processes in and after step S36 are repeated.

  In step S42, if there are no W or more complete data, the process returns to step S33, and the processes in and after step S33 are repeated for other work.

  When the values of the failure rate functions m and η are obtained as described above, the failure rate calculation unit 23 obtains the failure rate for each facility using the functions. The details of the failure rate calculation process and failure mode determination process performed by the failure rate calculation unit 23 will be described below with reference to FIGS. 16 and 17. FIG. 16 shows an embodiment of the present invention and is a flowchart showing a failure rate calculation process and a failure mode determination process. FIG. 17 is a diagram illustrating the data structure of the life data 331 reflecting the processing results of the failure rate calculation processing and failure mode determination processing.

(Failure rate calculation processing and failure mode judgment processing)
First, the failure rate calculation unit 23 receives the functions m and η from the failure rate function calculation unit 22 (S51). The failure rate calculation unit 23 calculates a population average u of life time for each work (S52), and calculates a failure rate when the average is reached (S53).

  Specifically, using the gamma function shown in the following formula (13), the population average u of the lifetime is calculated by formula (14). Then, the failure rate λ (t) when t = u in Equation (15) is obtained.

  As described above, when the failure rate calculation unit 23 performs the failure rate calculation process, the failure rate calculation unit 23 determines the failure mode from the value of m received from the failure rate function calculation unit 22 (S54). In the work record input device 1 according to the present embodiment, the initial failure period when m <0.9, the accidental failure period when 0.9 ≦ m ≦ 1.1, and the wear when m> 1.1. Determined as a failure period. That is, the range of values that m can take is widened so that the period in which 0.9 ≦ m ≦ 1.1 is the accidental failure period. The range of values that m can take when determining this accidental failure period is not limited to this, and is appropriately changed according to the specifications of the actual production line, the equipment whose failure rate is determined, and the like. .

  Next, the failure rate calculation unit 23 determines whether the failure rate calculation process and the failure mode determination process described above have been performed for all N tasks (S55). If it is determined that not all the operations are performed (“NO” in S55), the processing from step S51 to S54 described above is repeated for the other operations.

  On the other hand, if it is determined that all work has been performed (“YES” in S55), as shown in FIG. 17, the life average data 331 shown in FIG. Then, the failure mode is added and written in the lifetime data DB 31 (S56).

  As described above, the failure rate calculation unit 23 executes the failure rate calculation processing and the failure mode determination processing. Then, based on the calculated failure rate, the button assignment unit 24 executes button assignment processing for assigning work to the function keys in accordance with an operation instruction of the worker from the operation unit 4.

(Button assignment process)
First, the operation instruction content of the worker input from the operation unit 4 will be described.

  In the work record input device 1 according to the present embodiment, as the contents of the work assigned to each button (each function key), the type of work performed (work type), the equipment (equipment) that is the target of the work, and the occurrence The phenomenon (phenomenon) that occurred, and the cause (cause) that the phenomenon occurred are included.

  By the way, as shown in FIG. 5 for the relationship between each work and the failure rate, for example, it is assumed that there is a work type, a facility, and an occurrence phenomenon that are common although causes are different. In this way, for example, operations that differ only in cause and have common contents later can be combined as one operation. When summarized in this way, the failure rate can be expressed by adding the failure rates of each work to be summarized, as shown in the serial system, that is, Equation (16).

  For example, if the relationship between each work and the failure rate is as shown in FIG. 5 and the work types, facilities, and occurrence phenomena are summarized, the relationship between each work and the failure rate is as shown in FIG. As shown. FIG. 18 is a diagram illustrating a relationship between each work and the failure rate when a failure rate is obtained by collecting a plurality of tasks having common work items.

  That is, a common work type, equipment, and occurrence phenomenon are set as one work content, and the failure rates are added together, and the work content with a high failure rate is assigned to the function key. In addition, at this time, the work content assignment display for each function key is, for example, the content having a common display name (such as the occurrence phenomenon B3 of equipment B) as shown in FIG. In addition, the item excluded from the items to be summarized, “cause”, is not assigned to a function key, but is input to a worker individually when inputting a work record. FIG. 19 is a diagram illustrating an example of the button setting information 132 when a failure rate is obtained by collecting a plurality of works having common work items.

  As described above, in the work record input device 1 according to the present embodiment, a failure rate is calculated by collecting work common to a predetermined work item, that is, work common to a predetermined hierarchy including the predetermined work item, You can assign buttons.

  For this reason, when the operator operates the operation unit 4 to give an instruction to execute the button assignment process, an input screen as shown in FIG. 20 is displayed on the display unit 5. FIG. 20 shows an embodiment of the present invention and is a diagram showing an example of an input screen for instructing execution of button assignment processing.

  That is, on the input screen, a failure rate calculation method setting selection screen (whether or not to integrate work contents) is displayed. If you choose to integrate, ask whether you want to specify the hierarchy to be summarized when calculating the failure rate, or to set the group to be summarized by the worker himself from the list of work content data (manual setting) Display the screen.

  When the worker instructs manual setting, a list of work content data is displayed on the input screen. The types of work to be integrated are grouped by a flag called an integration flag. For work with the same integration flag, a failure rate is obtained by a serial system, and a function key is assigned to each integrated operation according to the failure rate.

  Next, the details of the button allocation processing by the button allocation unit 24 will be described with reference to FIG. FIG. 21 shows an embodiment of the present invention and is a flowchart showing button allocation processing.

First, when an instruction to start execution of button assignment processing is received from the operation unit 4, the button assignment unit 24 reads the life data 331 after the calculation processing of the failure rate calculation unit 23 from the life data DB 31 (S71). Next, designation information related to the failure rate calculation method is received from the operation unit 4 (S72). Then, the button allocation unit 24 determines whether or not to integrate the work contents according to this instruction (
S73). When the work contents are not integrated (“NO” in step S73), the failure rate is high with reference to each of the N pieces of work life data 331 reflecting the result calculated by the failure rate calculation unit 23. The operations are sorted in this order, and the operations up to the top L-th failure rate are assigned to each button (function key) (S74).

  On the other hand, if “YES” in the step S73, the button allocation unit 24 determines whether or not the work is specified by specifying the work item hierarchy (S75). Here, if “YES” in the step S75, the life data 331 of the work having the same work item up to the designated hierarchy is collected, and the sum of the failure rates is obtained (S76). Then, the button allocation unit 24 sorts in order of increasing failure rate sum. Further, the button assigning unit 24 assigns to the buttons up to the designated work items in the grouped work in which the failure rate is the top L-th (S77). At the time of this assignment, a display name is assigned to the button so that the summarized hierarchy can be understood.

  In the case of NO in step S75, that is, when it is determined to manually summarize the work, the button assigning unit 24 obtains the sum of the failure rates of the work that becomes the same integrated flag set by the worker (S78). Then, the button allocation unit 24 sorts in order of increasing failure rate sum. Further, the button assigning unit 24 assigns to the buttons up to the common work items of the collected work in which the failure rate is the top L-th (S79). At the time of this assignment, a display name is assigned to each button so that the summarized hierarchy can be understood.

  As described above, the button assignment unit 24 executes button assignment processing of work contents.

  When the button assignment unit 24 assigns each work content to a function key according to the failure rate, the assignment result is recorded in the work recording unit 30 as button setting information 132. In addition, when the assignment to the function key is completed, the button assignment unit 24 instructs the assignment display instruction unit 25 to display the function key and the work content assigned to the function key. In response to the instruction from the button assignment unit 24, the assignment display instruction unit 25 refers to the button setting information 132 and causes the display unit 5 to display the correspondence between the function key and the display name indicating the work content (output). Step).

  In the work record input device 1 according to the present embodiment, as described above, the failure rate calculation unit 23 performs a failure mode determination process. Therefore, referring to the determined failure mode, the warning display instruction unit 26 displays a warning when the failure mode is changed, particularly when the failure mode is the wear failure period (IFR). (Warning display processing). Details of the warning display processing by the warning display instruction unit 26 will be described below with reference to FIGS. 8 and 22 described above. FIG. 22 shows an embodiment of the present invention and is a flowchart showing warning display processing.

  First, the warning display instruction unit 26 refers to the life data DB 31 and reads the life data 331 in which the failure mode is IFR in the current failure rate calculation process (time T) (S91). In the work record input device 1 according to the present embodiment, the warning display instruction unit 26 reads the life data 331 when the life data 331 is updated with the failure rate calculated by the failure rate calculation unit 23 in the life data DB 31. Is configured to do. That is, when the update of the life data 331 is completed, the failure rate calculation unit 23 notifies the warning display instruction unit 26 to that effect.

  When the warning display instructing unit 26 reads the life data 331 of the work content whose current failure mode is IFR, the warning display instruction unit 26 further reads the previous failure rate and failure mode of the work content (time TK). Include. Then, the warning display instruction unit 26 associates the read failure rate and failure mode of the previous work with the life data 331 of the work read this time (at time T) (S92). Then, the warning display instruction unit 26 determines whether or not both of the failure modes at this time (time T) and the previous time (time TK) are IFR (S93).

  When both of the failure modes are IFR (“YES” in S93), the warning display instruction unit 26 determines whether the work item (work type, equipment, phenomenon, cause) of the work to be IFR is the last time, as shown in FIG. Display data highlighting the failure rate and failure mode at (time TK) and the failure rate at this time (time T) is created. Then, the display data is output to the display unit 5, and display based on the display data is performed (S94).

  On the other hand, when both of the failure modes are not IFR (“NO” in S93), the warning display instruction unit 26 displays the work item (work type, equipment, phenomenon, cause) of the work, the previous time (time TK). Display data for the failure rate and failure mode, and the current failure rate (time T) is created. Then, the display data is output to the display unit 5, and display based on the display data is performed (S95). Note that the display based on the display data is a normal display that does not have a visual effect such as emphasis.

  As described above, the work record input device 1 according to the present embodiment has a configuration in which work contents for a facility are assigned to buttons (function keys) in accordance with a failure rate occurring in the facility. Then, when the worker selects a function key to which the work content is assigned, the work content can be recorded. In addition to the work contents assigned to the function keys, when there is information to be recorded individually, the configuration can be additionally recorded using the button setting screen 201. However, the work record input method is not limited to the form using the function keys as described above, and the work content may be recorded using the work record input screen as shown in FIG. Good.

  More specifically, in the input screen shown in FIG. 23, for input of characters in correspondence with each item (for example, “equipment”, “part”, “occurrence phenomenon”, etc.) constituting the work content. A combo box in which a rectangular area (text box) and an item selection list (list box) are combined is provided.

  A button is provided at the right end of the text box in each combo box, and when this button is pressed, a list of work items that can be selected in the work content is displayed in a list, from which the worker selects a desired work item. Can do. In the list display, the work items are displayed in order from the highest failure rate.

  That is, according to the failure rate obtained by the failure rate calculation unit 23 as described above, the button assigning unit 24 orders the task contents data 130 for failures with a higher failure rate in order from the top of the list. . Then, the allocation display instruction unit 25 outputs the list of the work content data 130 ordered by the button allocation unit 24 to the display unit 5 for display.

  In the work content input screen of FIG. 23, work items up to “equipment”, “part”, and “occurrence phenomenon” are summarized and the failure rate is obtained. In “equipment”, “part”, and “occurrence phenomenon”, Work items with a high failure rate obtained as a result of the compilation are displayed. On the other hand, with respect to the “treatment” work items that have not been compiled, the work items that have been input in the past as “treatment” are displayed in a list in descending order of failure rate.

  As described above, since the list can be preferentially displayed in descending order of the failure rate, the worker can easily select the work content item to be recorded and efficiently record the work record.

  As described above, the work record input device 1 according to the present embodiment inputs the work content data 130 of the work performed on each facility in the production line in order to maintain the normal operation state of the production line. The apparatus includes an operation unit 4 and can record work content data 130 input by the operation unit 4.

  Then, by storing the input work content data 130 as the work record DB 131, the history information of the work content data 130 can be obtained.

  Further, the life data creation unit 21 refers to the work record DB 131 and sorts and classifies the work contents in order of the work start time so that the life time for each work content can be obtained.

  The failure rate function calculation unit 22 calculates a failure rate function from the determined life time and the order of the work start times, and the failure rate calculation unit 23 calculates and calculates the failure rate according to the failure rate function. The allocation display instruction unit 25 can be controlled to display on the display unit 5 with priority given to the support information that supports the input of the work content data 130 relating to the failure having a high failure rate according to the failure rate.

  As this support information, for example, as shown in FIG. 9 described above, information indicating the correspondence between function keys and work contents in the work content registration area 202 of the main screen 200, or a combo box on the input screen shown in FIG. The information which shows the list of can be mentioned.

  That is, the button assignment unit 24 can assign the work content data 130 for a failure with a high failure rate to a predetermined function key or perform ordering in a list. For this reason, the allocation display instruction unit 25 may cause the display unit 5 to display the correspondence between the function keys and the work content data 130 allocated thereto, or may display an ordered list on the display unit 5. it can.

  In this way, the work record input device 1 can preferentially output support information that supports the input of the work content data 130 for a failure with a high failure rate. For this reason, it is possible to preferentially provide support information that supports the input of the work content information of this work with a high probability at the time of work on the facility where the failure has occurred. Therefore, the worker can efficiently input work records.

  As shown in FIG. 1, the work record input device 1 according to the present embodiment is configured to include the storage device 3, but the storage device 3 is provided separately from the work record input device 1. It may be. When configured to be provided separately as described above, the work record input device 1 is communicably connected to the storage device 3 by wireless or wired such as a communication cable so that necessary data can be transmitted and received between them. Configured.

  Finally, each block of the work record input device 1, in particular, a life data creation unit 21, a failure rate function calculation unit 22, a failure rate calculation unit 23, a button allocation unit 24, an allocation display instruction unit 25, a warning display instruction unit 26, and The recording unit 27 may be configured by hardware logic, or may be realized by software using a CPU as follows.

  That is, the work record input device 1 includes a CPU (central processing unit) that executes instructions of a control program that realizes each function, a ROM (read only memory) that stores the program, and a RAM (random access memory) that expands the program. ), A storage device (recording medium) such as a memory for storing the program and various data. An object of the present invention is a recording medium in which a program code (execution format program, intermediate code program, source program) of a control program of the work record input device 1 which is software that realizes the above-described functions is recorded so as to be readable by a computer. Can also be achieved by reading the program code recorded on the recording medium and executing it by the computer (or CPU or MPU).

  The work record input device 1 may be configured to be connectable to a communication network, and the program code may be supplied via the communication network.

  The present invention can also be realized in the form of a computer data signal embedded in a carrier wave in which the program code is embodied by electronic transmission.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope shown in the claims. That is, embodiments obtained by combining technical means appropriately modified within the scope of the claims are also included in the technical scope of the present invention.

  The recording apparatus according to the present invention can present support information for assisting input of work content for a failure according to a failure rate occurring in the facility. Therefore, the present invention can be applied to all uses where it is necessary to input a work record for each facility in a state where the facility is constantly operating like a production line.

1, showing an embodiment of the present invention, is a block diagram showing a schematic configuration of a work record input device. FIG. It is a figure which shows embodiment of this invention and shows an example of work content data. FIG. 5 is a diagram illustrating an example of a failure occurrence state in an arbitrary data collection period according to the embodiment of this invention. FIG. 3 is a diagram illustrating an example of life data according to an embodiment of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 illustrates an embodiment of the present invention and is a diagram illustrating an example of a relationship between each work and a failure rate. It is a figure which shows embodiment of this invention and shows an example of button setting information. It is a figure which shows an example of the allocation state of the operation | work to the function key which concerns on this invention. FIG. 4 is a diagram illustrating an example of a warning display of a failure mode change, according to an embodiment of the present invention. FIG. 4 is a diagram illustrating an operation record input screen according to the embodiment of this invention. FIG. 9 is a flowchart illustrating an operation content assignment determination process according to the embodiment of this invention. It is a figure which shows embodiment of this invention, and is a flowchart explaining a lifetime data collection process. 5 is a flowchart illustrating an embodiment of the present invention and a failure rate function calculation process. FIG. 4 is a diagram illustrating an example of a data structure of life data at the time of calculation processing of a failure rate function according to the embodiment of this invention. FIG. 5 is a diagram illustrating an example of a data structure of life data after a failure rate function calculation process according to an embodiment of the present invention. It is a figure which shows an example of the observed value plotted on the Weibull probability paper, The figure (a) shows the case where j = 1 is made into a data collection start point, The figure (b) shows j = t-1. The case where it is set as the data collection start point is shown. FIG. 9 is a flowchart illustrating a failure rate calculation process and a failure mode determination process according to an embodiment of the present invention. FIG. 5 is a diagram illustrating an embodiment of the present invention and a data structure of life data after a failure rate calculation process and a failure mode determination process. It is a figure which shows the relationship between each operation | work and failure rate when the failure rate is calculated | required by putting together the some operation | work which has a common work item. It is a figure which shows an example of the button setting information when the failure rate is obtained by collecting a plurality of work having common work items. FIG. 7 is a diagram illustrating an example of an input screen for instructing execution of button allocation processing according to the embodiment of this invention. FIG. 9 is a flowchart illustrating button allocation processing according to the embodiment of the present invention. FIG. 9 is a flowchart illustrating a warning display process according to the embodiment of this invention. FIG. 4 is a diagram illustrating an operation record input screen according to the embodiment of this invention. It is a graph which shows a prior art and shows an example of a bathtub curve.

Explanation of symbols

1 Work record input device (recording device)
3 Storage device 4 Operation unit (input means / buttons)
5 Display unit 21 Life data creation unit 22 Failure rate function calculation unit (failure rate calculation means / failure rate function calculation means)
23 Failure rate calculation unit (failure rate calculation means / failure period determination means)
24 Button allocation part (association means / ordering means)
25 Allocation display instruction section (output means)
26 Warning display instruction section (notification means)
27 Recording section (recording means)
31 Life data DB
130 Work content data (work content information)
131 Work record DB (work history information)
132 Button setting information (support information)
331 Life data

Claims (12)

A recording device for recording work content information indicating the content of work performed on each facility in the production line in order to maintain a normal operation state of the production line,
Input means for inputting the work content information;
Recording means for recording work content information input by the input means;
Based on the work history information that is the history of the work content information recorded by the recording means, an interval at which a failure occurs in the facility is obtained, and a failure rate that is a probability that the facility will fail at a predetermined timing is calculated. Failure rate calculation means,
Output means for outputting support information for supporting the input of the work content information in the input means,
The output means preferentially outputs support information that supports input of the work content information of work performed in response to a failure with a high failure rate, according to the failure rate calculated by the failure rate calculation means. A recording apparatus. The input means has a predetermined number of buttons for inputting the work content information,
Preferentially the work content information of the work to be performed in response to a failure with a high failure rate calculated by the failure rate calculation means, further comprising an association means for associating the work content information with the button, respectively.
The recording apparatus according to claim 1, wherein the output unit outputs a correspondence relationship between the button associated with the association unit and the work content information as the support information. The system further comprises ordering means for ordering from the work content information of work to be performed in response to a failure with a high failure rate calculated by the failure rate calculating means in order from the top of the list.
The recording apparatus according to claim 1, wherein the output unit outputs a list of work content information ordered by the ordering unit as the support information. The work content information includes a predetermined work item,
The failure rate calculation means summarizes failure rates of failures dealt with by work of work content information in which work content is common for the specified work item based on the work history information, and performs work on the specified work item. Find the failure rate of the work content information group, which is a set of work content information with common content,
The output means preferentially outputs support information that supports input of the work content information group having a high failure rate according to the failure rate of the work content information group calculated by the failure rate calculation means. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus. The input means has a predetermined number of buttons for inputting the contents of the work.
Preferentially the work content information group with a high failure rate calculated by the failure rate calculation means, further comprising an association means for associating with the button,
The recording apparatus according to claim 4, wherein the output unit outputs a correspondence relationship between the button associated with the association unit and the work content information group as the support information. The system further comprises an ordering means for ordering in order from work content information of work performed in response to a failure with a high failure rate calculated by the failure rate calculation means,
The output means uses the ordering means to calculate the work contents common to the work content information group with the highest failure rate obtained by the failure rate calculation means and the work contents included in work items other than the designated work items. 5. The recording apparatus according to claim 4, wherein a list arranged in accordance with the ordering is combined and output as support information.   The failure rate calculation means obtains a failure rate of the work content information group by adding together failure rates of failures to be dealt with by work content information having a common work content of a specified work item. Item 7. The recording device according to any one of Items 4 to 6.   The recording apparatus according to claim 1, wherein the failure rate calculation unit calculates a failure rate using a probability density function having a Weibull distribution.   When the time interval at which a failure occurs at the predetermined timing is obtained and there is censored data that is data with an uncertain time interval, the failure rate calculation means calculates the failure rate using a cumulative hazard function. The recording apparatus according to claim 1, wherein the recording apparatus is a recording apparatus. The failure rate calculation means further comprises failure rate function calculation means for calculating a shape parameter and a scale parameter that are failure rate functions in the probability density function of the Weibull distribution used for calculating the failure rate,
The shape parameter, which is the failure rate function, is m, the scale parameter is η, the failure distribution function indicating the probability of failure by a specified time t is F (t), and the reliability obtained from the failure distribution function F (t) If the function is 1-F (t) = exp [-(t / η) ^m ],
The failure rate function calculation means calculates log (log (1 / (1-F (t)) on the left side of the natural logarithm of both sides of 1−F (t) = exp [− (t / η) ^m ]. ))) Is an objective variable y and log (t) in mlog (t) -mlog (η) on the right-hand side is an explanatory variable x, and a regression coefficient determined from the relationship between the explanatory variable x and the objective variable y is used. 10. The degree of matching between the failure rate function and the observed value is determined, and when the degree of matching does not satisfy a predetermined value, the data collection start time in the work history information is updated. The recording apparatus according to claim 1. Failure period determination means for determining the presence or absence of equipment in a wear failure period in which the failure rate increases with time with the passage of time, based on the shape parameter,
The recording apparatus according to claim 10, further comprising a notification unit configured to notify the facility in the wear failure period when the failure period determination unit determines that there is the facility in the wear failure period. . In order to maintain the normal operating state of the production line, a control method for a recording apparatus for recording work content information indicating the content of work performed on each facility in the production line,
An input step for inputting the work content information;
A recording step for recording the work content information input in the input step;
Based on the work history information that is the history of the work content information recorded in the recording step, an interval at which the failure occurs in the facility is obtained, and a failure rate that is a probability that the facility will fail at a predetermined timing is calculated. Failure rate calculation step;
An output step for outputting support information for supporting the input of the work content information in the input step,
In the output step, according to the failure rate calculated in the failure rate calculation step, priority is given to outputting support information that supports input of the work content information of work performed in response to a failure with a high failure rate. A control method for a recording apparatus.

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