JP3563230B2 - Production line status display - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention displays the status of the production line Production line status display device Things.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, as a method for displaying a state of a production line, the following various methods are known. That is, as a typical graph showing the state of one product produced in a certain production line, (1) paying attention to a specific work, and displaying the total number of works processed in the work with respect to a certain time axis (2) Displaying the number of works being processed or waiting to be processed in the work arranged in the processing order by paying attention to a certain time, that is, displaying the distribution of the work with respect to the work axis. (JP-A-5-233639).
[0003]
(3) In order to show the characteristics of the production line, the number of works processed per unit time is displayed with respect to the number of works in the entire line (Japanese Patent Laid-Open No. 6-69089). On the other hand, there are those which display the load of the processing device (JP-A-6-143107, JP-A-6-161514), and graphs for displaying these are also known.
[0004]
In this specification, “work” refers to a semi-finished product obtained by partially processing raw materials to complete a product, and “work” refers to processing required to complete a product. Unit.
[0005]
[Problems to be solved by the invention]
By using the above graph, the state of the production line can be seen from various angles.However, the number of works to be processed in each work during a certain period, and the work in the line There has been no known production line status display method capable of collectively displaying how the information is distributed with respect to the production line.
[0006]
In addition, if a production line to be managed has a multi-functional processing device that can handle a large number of operations, it is important in line management to determine what proportion of the processing capacity should be allocated to each task. Become a strategy. For example, when planning how to allocate the processing capacity of a multifunctional processing device to each work during a certain period, how the work in the line is distributed to the work at the beginning of the period In addition, the distribution of the work in the line at the end of the period is also an important index for evaluating such a production plan.
[0007]
In this case, these pieces of information can be displayed using two graphs, but it is difficult for a production planner to see the two graphs and imagine the correlation between the two pieces of information. Was not able to plan and evaluate efficiently.
[0008]
The present invention has been proposed in order to solve the above-described problems of the related art. It is an object of the present invention to provide a production line including a plurality of works, a processing amount of each work in a certain period, and Another object of the present invention is to provide a production line state display device and a production line state display method that can unifiedly display the distribution of works at the end.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, an invention according to claim 1 is a production line state display device for displaying a state of a production line including a plurality of operations, wherein the processing result data of each operation is stored. Means for storing processing plan data of each operation, means for collecting total processing amount data processed up to a plurality of time points to be displayed as a graph for each operation, and means for each operation at each time point The total amount of processing is plotted on the horizontal axis, and the vertical axis shows the cumulative number of operations in each operation. A display means for displaying the change in the processing amount at each time point and a difference in the processing amount between the time points, and a means for collecting the total processing amount data, which is displayed as the graph. At the time Flip and reads the total processing amount from the total amount of processing data processed by the point, characterized in that for collecting the total amount of processing data processed by the time.
[0010]
According to a second aspect of the present invention, in the first aspect of the present invention, the displaying means displays a total processing amount based on the processing plan data together with the total processing amount.
[0011]
According to the production line state display device according to claim 1 having the above-described configuration, the total processing amount processed so far in each work is displayed on the graph at the start and end of the period of interest. , The distribution of works is displayed by the shape of the graph, and the number of work pieces of each work in this period is determined by the distance between the total processing amount line at the end of the period of interest and the total processing amount line at the start. Is expressed. As a result, on one total processing amount graph, the processing amount for each work in a certain period and the temporal transition of the work distribution are shown. Overview be able to.
[0012]
Also, Claim 2 According to the production line state display device described above, the total processing amount can be obtained based on the processing plan data stored in advance, even if the time point of displaying as a graph is after the present time. It can be used effectively by modification.
[0013]
It should be noted that a production line management device can be configured by incorporating the production line state display device of the present invention. That is, for a plurality of operations included in the production line, means for sequentially collecting at least the processing start information and the processing amount, and for each of the operations, means for calculating the total processing amount processed up to the time when it is desired to display the graph, A production line management device including means for storing the total processing amount as total processing amount data associated with each work name and means for displaying the state of the production line using the total processing amount data is considered. Can be
[0014]
Further, in addition to the above configuration requirements, a unit for inputting production plan data of a production line including a plurality of operations, a unit for storing the production plan data, and a unit for sending a production command based on the production plan data A production line management device provided with
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0016]
[1. First Embodiment]
The present embodiment relates to a production line status display device and a production line status display method.
[0017]
[1-1. Configuration of First Embodiment]
FIG. 1 is a block diagram showing the configuration of the production line status display device of the present embodiment. In other words, the production line state display device of the present embodiment provides, for each processing device on the production line, the total amount of processing performed by each processing device until the time specified by the user (that is, the time desired to be displayed on the graph). A total processing amount data collection unit 1 for collecting total processing amount data listing the processing names in association with each other, and a “work name numerical value conversion table” or “work name” for converting the work names into predetermined numerical values. A conversion data storage unit 2 for storing conversion data such as “numerical conversion rules”; a total processing amount graph creation unit 3 for generating a total processing amount graph from the work names converted into numerical values and the corresponding total processing amounts; A total processing amount graph display unit 4 for displaying the generated total processing amount graph.
[0018]
When there are a plurality of times designated by the user, total processing amount data at a plurality of time points are sequentially collected, and a line graph, a bar graph, or the like representing the total processing amount at each time point can be displayed.
[0019]
Here, the “total processing amount data” is a list of each work in the operation sequence in association with the work name and the total processing amount, and the “operation sequence” is used to complete a certain product. Necessary tasks are listed in the order of processing.Even if the processing is the same, once it is processed, another processing is performed, and if the same processing is performed again, it will appear twice in the work queue. I do.
[0020]
In addition, the “work name numerical value conversion table” used as information for associating each work in the work column with the position on the work axis of the graph is a list in which each work name is associated with a numerical value. The “work name numerical value conversion rule” indicates a rule for generating a numerical value from each work name.
[0021]
[1-2. Operation of First Embodiment]
FIG. 2 is a flowchart showing a processing procedure of the production line status display device of the present embodiment. When displaying the total processing amount at a plurality of time points, the processing shown in FIG. 2 is repeated for each time point.
[0022]
That is, the total processing amount data collection unit 1 collects the total processing amount data of each processing device on the production line at the time instructed by the user (step 201), and performs the work indicated in the total processing amount data. The work name is converted into a predetermined numerical value based on the conversion data stored in the conversion data storage unit 2 in advance (step 202), and the work name converted into the numerical value by the total A total processing amount graph is created from the processing amount (step 203), and the total processing amount graph display unit 4 displays the generated total processing amount graph (step 204).
[0023]
[1-3. Example of total processing amount graph]
FIG. 3 shows an example of a total processing amount graph when the production line handles only one product of work.
[0024]
As in this example, when the production line handles only one product of work, it is necessary to sequentially perform processing according to a predetermined work sequence in order to complete a certain product. The feature of the present embodiment is a method of displaying the state of the production line using a graph in which the work column is set on the horizontal axis and the cumulative number of works processed in each work is set on the vertical axis. Hereinafter, this graph is referred to as a “total processing amount graph”.
[0025]
The specific display method of the total processing amount graph is as follows (see FIG. 3). That is, work columns are set on the horizontal axis, numbers 1 to n are assigned to each work in the order of processing, and the range of the horizontal axis is set to 0 to n. Then, the input operation is set to the 0th operation, displayed at the position of the origin on the horizontal axis, and the payout operation is set to the nth operation. On the other hand, the total amount of processing is displayed on the vertical axis.
[0026]
Then, the state of the line at that time is displayed by a polygonal line connecting the total processing amount of each operation at a certain time. This broken line is called, for example, a “total processing amount line at time t”. Therefore, by displaying the total processing amount line at regular time intervals, it is possible to represent a change in the state of the line (in FIG. 3, the total processing amount lines at three points in time t-1, t, and t + 1 are displayed). ing).
[0027]
It should be noted that, for one work, the work downstream of the work queue must always be performed after the work upstream, so that the value of the total work does not exceed the value of the work upstream as well. In other words, the total processing amount graph decreases monotonically in a broad sense. In other words, the total processing amount line is always horizontal or downward to the right.
[0028]
In the present embodiment, the display range of the vertical axis is the payout work at the start time of the period (time t−1) for the period of interest (in FIG. 3, time t−1 to time t + 1). The range from the total throughput value (point A in FIG. 3) to the total throughput value of the input work at the end of the period (time t + 1) (point B in FIG. 3) is displayed.
[0029]
As described above, the origin of the vertical axis is not set to the operation time of the line, but to the total processing amount value of the payout work (point A in FIG. 3) at the start time (time t-1) of the focused period. For the following reasons. That is, since the original origin of the vertical axis is the operation time of the line, if the time to be displayed is a long time after the operation of the line, the origin becomes far from the origin and the display range becomes too large. In addition, the work for which the payout operation has been completed is paid out from the line as a product, and therefore it is not necessary to consider it in normal line management.
[0030]
Note that this display range is a range from the origin of the total processing amount (the operation time of the line) to the total processing amount value of the input work at the end time point (time t + 1) of the focused period (point B in FIG. 3). Needless to say, it can be done. Also, FIG. 3 shows the total processing amount graph by using a polygonal line, but may be displayed in a stepwise manner as shown in FIG. 4 and further as a bar graph as shown in FIG. good.
[0031]
[1-4. Effect obtained by displaying using the total processing amount graph]
Next, the interpretation of the total processing amount graph and various information obtained from the total processing amount graph in the present embodiment will be described with reference to FIGS.
[0032]
(1) By examining a specific position on the horizontal axis, a processing history of a certain work, particularly, a processing amount in a certain period can be found. That is, for a certain work (for example, work number i), the total number of works processed up to the time point (for example, time t) of an arbitrary total processing amount line is known, and two arbitrary time points (for example, time t−1 and From the distance between the total processing amount lines at the time t), the number of works processed in that period can be known. In particular, the distance between the total processing amount lines at any two points in the input work indicates the input amount in the period, and the distance in the payout operation indicates the payout amount in the period.
[0033]
(2) The total processing amount of a production line to be displayed in a certain period can be known. In other words, the area of the area between the total processing amount lines at any two points in time (the range sandwiched between the input and output operations on the left and right) represents the total number of workpieces processed in the line during this period.
[0034]
(3) The number of works existing in each work is known. For example, as shown in FIG. 6A, when there is a difference between the total processing amount of the i-th work and the total processing amount of the (i-1) -th work on the total processing amount line at time t-1, the difference is calculated. As many works are present in the i-th work. This depends on the capacity of the processing device, but generally means that the first work is being processed and the remaining works are waiting for processing.
[0035]
(4) The distribution of the work in the work row can be understood. As a natural consequence of (3), it can be seen how the works are distributed in the work column. That is, when the total processing amount line is viewed as a macro, the slope of the line (strictly, the absolute value of the slope since the slope is always 0 or negative) indicates the density of the work in the work. For example, it means that a large amount of work exists in an operation having a steep slope of the total processing amount line, and only a small amount of work exists in an operation having a gentle inclination of the total processing amount line. FIG. 6B shows the work distribution in the work sequence at times t-1 and t, and these are the differential coefficients of the total processing amount line at the corresponding time, that is, the absolute values of the slopes. I have.
[0036]
(5) The total amount of works on the production line can be known. As a natural consequence of (3), the total amount of work on the production line can be determined from the difference between the total processing amount of the input (0th) operation and the payout (nth) operation at a certain time. Further, the difference between the total processing amounts of any two operations indicates the amount of work between the two operations.
[0037]
[1-5. Modification of First Embodiment]
In the above embodiment, the production line handles only one product work. However, the present invention can be applied to a case where the production line handles a plurality of products. In general, work columns are different for different products. Therefore, in order to display a state of a line for producing a plurality of products, it is necessary to make a total processing amount graph for each product. However, if there are a plurality of common tasks in the work queue even if the products are different, these are extracted as representative tasks, and focusing on this representative task only, multiple products are reduced to one product, and one A plurality of products can be displayed collectively on the total throughput graph. As a result, the progress of the representative work is shown in the total processing amount graph, so that the state of the production line handling a plurality of products can be overviewed, and the production management becomes easy.
[0038]
Also, the total processing amount graph is not limited to those shown in FIGS. 3 to 5, and the same effect can be obtained by using a graph in which the horizontal axis and the vertical axis are exchanged, and the positive and negative directions of each axis are exchanged. Needless to say, Further, in the total processing amount graph, it is important to understand the difference in the total processing amount between operations, and the absolute magnitude of the total processing amount is not important. In the first embodiment, the operation time of the line is set as the origin of the total processing amount. However, the same effect can be obtained by displaying the total processing amount with an arbitrary time point as the origin of the total processing amount. For example, based on the work that was put into the line earliest among the works in the line (generally, the top work in the lowest payout work), the number of works processed in each work after this work is calculated vertically. It may be displayed on the axis.
[0039]
Further, in FIG. 3, the horizontal axis is the work number, but as shown in FIG. 7, a graph using this as the cumulative theoretical work period may be considered. That is, in FIG. 7, since the difference between the cumulative theoretical work periods of the operation numbers i-1 and i is smaller than the difference between the cumulative theoretical work periods of the work numbers i and i + 1, the theoretical work period of the work number i is smaller than the theoretical work period of the work number i-1. It turns out that it is longer than the construction period. In other words, it can be seen that the work time of work number i is longer than the work time of i-1.
[0040]
Note that the cumulative theoretical construction period refers to the sum of the theoretical construction periods from the input operation to immediately before the work of interest. In addition, the theoretical construction period refers to a period of time when a work is purely performed on a work, excluding a transfer time and a waiting time that occur between the completion of a certain work and the start of the next work. . In some cases, the shortest transport time is included in the theoretical construction period.
[0041]
[1-6. Effect of First Embodiment]
As described above, according to the present embodiment, it is possible to provide an overview of the processing amount for each work in a certain period and the temporal transition of the work distribution on one total processing amount graph.
[0042]
[2. Second Embodiment]
The present embodiment relates to a production line management device including the production line status display device shown in the first embodiment.
[0043]
[2-1. Configuration of Second Embodiment]
FIG. 8 is a block diagram illustrating a configuration of the production line management device according to the present embodiment. That is, the production line management apparatus of the present embodiment collects processing start information transmitted when each processing apparatus 21 provided on the production line 20 starts processing a work, records the history thereof, and records each processing start information. An information collection unit 22 for sequentially collecting the processing amount of the device, a display time input unit 23 for inputting a time at which the user wants to display the graph, and a total processing performed by each processing device up to a time instructed by the user. A total processing amount calculation unit 24 for calculating the amount, a total processing amount data storage unit 25 for storing the total processing amount as total processing amount data associated with each work name, and using the total processing amount data, A production line state display device 26 for creating and displaying the total processing amount graph described in the first embodiment.
[0044]
[2-2. Operation and effect of second embodiment]
According to the production line management device of the present embodiment having the above-described configuration, for each processing device on the production line, the time (the display designated time) designated by the user from the time when the device starts processing the work. ) Can be obtained, and the total processing amount graph described in the first embodiment can be created and displayed based on the total processing amount.
[0045]
As a result, the progress status of each operation on the production line, the distribution of the work, and the total amount can be correlated and expressed by one graph. This is an extremely effective function for managing a job shop type production line, and makes it easy to estimate production capacity, create a work plan, manage work progress, and the like.
[0046]
In particular, when there is a multifunctional device, how to allocate the capacity to each task in charge is an important strategy, but as a material for determining this strategy, how much processing of each task in a certain period (what The total processing amount graph which can see whether the work progresses) is very useful.
[0047]
[3. Third Embodiment]
The present embodiment relates to a production line status display device and a production line status display method.
[0048]
[3-1. Configuration of Third Embodiment]
FIG. 9 is a block diagram illustrating a configuration of the production line status display device according to the present embodiment. That is, the production line state display device of the present embodiment includes a total processing amount data collection unit 30 for collecting total processing amount data, a display time point information input unit 31 for inputting a time point to be displayed on the total processing amount graph, Each of the above processing devices includes a processing result data storage unit 32 that stores processing result data and a processing plan data storage unit 33 that stores processing plan data. Further, it is the same as the first embodiment in that it has a conversion data storage unit 2, a total processing amount graph creation unit 3, and a total processing amount graph display unit 4.
[0049]
[3-2. Operation of Third Embodiment]
FIG. 10 is a flowchart showing a processing procedure of the production line status display device of the present embodiment. That is, when display time information is input via the display time information input unit 31 (step 1001), it is determined whether or not the display time is in the future (step 1002). The total processing amount data is read from the storage unit 32 (step 1003), while in the future, the total processing amount data is read from the processing plan data storage unit 33 (step 1004), and the read total processing amount The data is transferred to the total processing amount graph creation unit 3 via the total processing amount data collection unit 30 (step 1005).
[0050]
Subsequently, the work name indicated in each total processing amount data is converted into a predetermined numerical value based on the conversion data stored in advance in the conversion data storage unit 2 (step 1006), and the work name converted into the numerical value and A total processing amount graph is created from the corresponding total processing amount (step 1007), and the total processing amount graph display unit 4 displays the generated total processing amount graph (step 1008).
[0051]
When the display time information for a plurality of time points is input, the processing of FIG. 10 is repeated for each time point, and the total processing amount data for each time point is sequentially read out. can do.
[0052]
[3-3. Effect of Third Embodiment]
As described above, according to this embodiment, on one total processing amount graph, based on the past processing result data and the future processing plan data, the processing amount for each work in a certain period and the work distribution Since the transition over time can be overviewed, it can be effectively used by creating and modifying a production plan.
[0053]
[4. Fourth embodiment]
This embodiment relates to a production line state display method.
[0054]
For example, when there is a branch or merge in the middle of the production line, or when there is an inspection operation and the rejected work is removed, a step occurs in the total processing amount at the discontinuous portion. However, according to the original definition of the total processing amount graph, the difference in the total processing amount of adjacent works indicates the number of works waiting for downstream work or the number of works being processed (hereinafter referred to as “waiting work”). In the discontinuous portion as described above, a step is also generated due to the discontinuity, so that it is difficult to know the difference due to the waiting work.
[0055]
In the present embodiment, even when displaying the state of the production line having such a discontinuous portion, it is possible to easily grasp only the difference due to the waiting work, excluding the influence of the step of the total processing amount due to the discontinuous portion. It is intended to present a possible production line status display method. The figure shown below is based on the assumption that there is an inspection operation in the middle of a production line, and as a result of the inspection, a rejected work is removed from the line.
[0056]
That is, in FIG. 11, two values, ie, a value representing the total number of works inspected and a value representing the number of works passed the inspection, are taken as the total processing amount of the inspection work, and the total processing amount graph before the inspection work and the inspection work A step is provided between the graph and the graph of the total processing amount thereafter.
[0057]
Also, in FIG. 12, the total processing amount graph after the inspection work shown in FIG. 11 is added and displayed by the amount corresponding to the level difference, while in FIG. 13, the total processing amount graph before the inspection work shown in FIG. The total processing amount graph is displayed by subtracting the amount corresponding to the step. Therefore, in FIG. 12 and FIG. 13, the definition of the vertical axis differs before and after the inspection work. However, in both cases, the influence of the step of the total processing amount due to the discontinuous portion is removed, and the difference due to the waiting work is easily reduced. It becomes a graph that can be grasped.
[0058]
As described above, by using the display method described in the present embodiment, it is easy to grasp the difference part due to the waiting work separately from the difference due to the discontinuity caused by the inspection work or the like.
[0059]
[5. Fifth Embodiment]
This embodiment relates to a production line state display method in which a total processing amount graph is a three-dimensional graph.
[0060]
That is, as shown in FIG. 14, the two-dimensional total processing amount graph shown in FIG. 3 is given a time axis as a third axis to make it three-dimensional, and the time versus total processing amount graph is used to show the state of the production line. This is to present a display method.
[0061]
First, each work is numbered from 0 to n in the order of processing, this is set as a first axis (work axis), and time is set as a second axis (time axis). An axis representing the total processing amount is a third axis (total processing amount axis). Then, at a position determined by the work axis and the time axis, the cumulative number of works processed by the work up to that time, that is, the total processing amount is displayed.
[0062]
As described above, by using the display method shown in the present embodiment, not only the same effect as in the first embodiment can be obtained, but also when this graph is projected along one of the three axes, the following is obtained. Since three types of graphs are obtained, it is suitable for overviewing such information.
[0063]
First, by projecting along the work axis, a two-dimensional graph in which the total processing amount is plotted against time is obtained (see FIG. 15). This graph is called a flow curve and is a graph widely used in work management. Further, when the projection is performed along the time axis, a two-dimensional total processing amount graph in which the total processing amount is plotted with respect to the work is obtained (see FIG. 16). This graph is equivalent to the diagram shown in the first embodiment. Further, when projected along the total processing amount axis (consider the contour lines of the total processing amount axis not drawn in FIG. 14), a two-dimensional graph in which the operation is plotted against time is obtained (see FIG. 17). This graph is a trajectory of the work progress of the work, and shows which work each work in the line receives processing over time. This graph is also commonly used in work management.
[0064]
[6. Sixth embodiment]
In each of the above embodiments, the state of one product is displayed, or information of multiple products is extracted and displayed as one product by extracting representative work. In the present embodiment, the information of multiple products is displayed. The present invention relates to a production line state display method in which a total processing amount graph is converted into a three-dimensional graph by giving a product axis for identifying a product so as to be displayed on two graphs.
[0065]
That is, in the present embodiment, as shown in FIG. 18, the two-dimensional total processing amount graph shown in FIG. 3 is given a product axis as a third axis to make it three-dimensional, and the total processing amount graph for each product is obtained. A method for displaying a state of a production line is presented.
[0066]
First, each work is numbered from 0 to n in the order of processing, this is set as a first axis (work axis), and a unique number is given to a product, and an axis for identifying the product is set as a second axis (work axis). Product axis). Further, an axis representing the total processing amount is set as a third axis (total processing amount axis), and the cumulative number of workpieces of the product processed by the operation by a certain time at a position determined by the operation axis and the product axis, that is, Displays the total processing amount.
[0067]
Note that work columns generally differ from product to product, but not only the length of the columns is different, but also, in general, the processing content differs depending on the product, even if the tasks have the same number on the work axis.
[0068]
As described above, by using the display method described in the present embodiment, it is possible to display the state of the line at that time on a surface connecting the total processing amount of each work at a certain time. Note that this surface is referred to as, for example, “a total processing amount surface at time t”. For example, as shown in FIG. 18, by displaying the total processing amount surface at intervals of a certain time, it is possible to express a change in the state of a line for producing a multi-product (in FIG. 18, time t− The total processing amount planes at three time points 1, 1, and t + 1 are displayed.) Further, the volume between the total processing amount planes at the two points in time represents the total number of works processed in the line during that period.
[0069]
In particular, if there is a multi-functional device that can handle a large number of tasks, determine how much the capacity should be allocated to which tasks of which products, in other words, what proportion should be assigned to the amount of processing for each product or task in charge? This is an important strategy for managing production lines. As a material for determining this strategy, a total processing amount graph for each product, which can show how much (how many works) the processing of each product / work progresses in a certain period, is very effective.
[0070]
[7. Seventh embodiment]
The present embodiment relates to a production line management device including the production line status display device shown in the third embodiment.
[0071]
[7-1. Configuration of Seventh Embodiment]
FIG. 19 is a block diagram showing the configuration of the production line management device of the present embodiment, which is a further improvement of the production line management device shown as the second embodiment.
[0072]
That is, the production line management device of the present embodiment includes, in addition to the configuration requirements of the production line management device of the second embodiment, a production plan data input unit 40 for inputting production plan data of the production line, And a plan execution unit 42 that sends a production command based on the production plan data to each processing device 21 provided on the production line 20. In the present embodiment, when the display time specified by the user is after the present time, the total processing amount calculation unit 24 reads the production plan data from the production plan data storage unit 41, and until that time, The total processing amount is obtained and stored in the total processing amount data storage unit 25.
[0073]
FIG. 20 shows an example of the production plan data stored in the production plan data storage unit 41. The number of works to be processed in each work in the plan period is shown. In the form of a table in which the number of processes to be processed is associated with the number. FIG. 21 shows an example of a production command sent from the plan executing unit 42 to each processing device, which indicates which work each processing device should perform next, and indicates each processing device name (machine It is in the form of a table in which a work number is associated with a name. FIG. 22 shows an example of the processing history stored in the information collecting unit 22, in which past processing start information is accumulated.
[0074]
[7-2. Operation and effect of seventh embodiment]
In the production line management device of the present embodiment having the above configuration, when the production plan data is input from the production plan data input unit 40, this is recorded in the production plan data storage unit 41, and is stored in the plan execution unit 42. It is sent to each processing device 21 as a production command and executed.
[0075]
On the other hand, when each processing device 21 starts processing, the information collecting unit 22 collects processing start information, records the history thereof, and sequentially collects the processing amount in each processing device. Then, when the user inputs a time to be displayed on the graph, the total processing amount calculation unit 24 calculates the total processing amount up to that point, and the data is stored in the total processing amount data storage unit 25. Subsequently, the production line state display device 26 creates and displays a total processing amount graph based on the total processing amount data. If the display time specified by the user is after the present time, the production plan data is read from the production plan data storage unit 41, and the total processing amount up to that time is obtained.
[0076]
As described above, according to the production line management apparatus of the present embodiment, not only the past processing results but also the total processing amount graph can be created and displayed based on the future processing plan data. In addition to the functions and effects obtained by the production line management device, there is an advantage that the work plan can be examined and corrected more appropriately.
[0077]
[8. Eighth embodiment]
The present embodiment shows an example in which the total processing amount graph is applied to drafting of a work plan of a production line using a processing device having multiple functions. In other words, if there is a multi-functional device that can handle a large number of tasks, the production plan must determine how much that capacity should be allocated to which task, in other words, what proportion should be used for each task. This is an important issue when planning.
[0078]
FIG. 23 is a plan example of the processing amount distribution in the case where there is a device capable of taking charge of all the works in the work queue. is there.
[0079]
In this plan, the total processing amount line at time t is given, and what happens to the total processing amount line at time t + T will be planned. At this time, the part between the two total processing amount lines represents the processing amount in the period T, and the area of this part is defined by the processing capacity of the apparatus. By changing the shape of the quantity line, a distribution plan of the processing amount can be made.
[0080]
For example, FIG. 23A shows a production plan designed to have many workpieces after the passage of T, and FIG. 23B shows a production plan designed to have many products completed during T. Production plan. That is, although the area of the hatched portion is equal in both FIGS. 23A and 23B, the slope of the total processing amount line at time t + T is steeper in (A) than in (B). As a result, the total work amount at time t + T is larger in (A), and the payout amount at time t + T from time t is larger in (B).
[0081]
As described above, by using the total processing amount graph for drafting a work plan of a production line using a processing device having multi-functions, the “history of processing and product payout in the line”, “distribution of current work”, "Work distribution and product payout forecast as a result of implementing the production plan" can be displayed in a lump. The processing plan of the multi-function device can be visually performed.
[0082]
For example, when a production plan (how many works are processed in each work) is made for a certain plan period, the shape of the line connecting the total processing amount of each work at the end of the plan period will be The distribution of the work after the planning period can be grasped, and the number of products that can be paid out during the planning period can be grasped from the increase in the total processing amount in the payout work.
[0083]
As described above, the distribution of the work in the work is an important factor in whether or not the work can be paid out in response to uncertain production demands in the future, and how the work distribution at the end of the planning period is determined. This is an important decision that determines how much to meet the pending production requirements. Therefore, the ability to list the amount of payouts during the planning period and the distribution of workpieces at the end of the planning period means that a production plan can be formulated and modified while balancing the production requirements within the planning period with the subsequent production requirements. Means
[0084]
If the multi-function device is in charge of a part of the work instead of the whole work, extract the work in charge and draw a total processing amount graph, or use a common processing unit in the total processing amount graph for all operations. Although it is necessary to display the total processing amount graph, it is possible to use the total processing amount graph to plan the distribution of the processing amount among the assigned tasks for each processing device.
[0085]
【The invention's effect】
As described above, according to the present invention, in a production line including a plurality of operations, the processing amount of each operation in a certain period and the distribution of the work at the start and end of the period can be displayed in a unified manner. A production line status display device can be provided.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration of a first embodiment (production line state display device) of the present invention.
FIG. 2 is a flowchart showing a processing procedure of the production line status display device shown in FIG.
FIG. 3 is a diagram showing an example of a total processing amount graph;
FIG. 4 is a diagram illustrating an example of a total processing amount graph;
FIG. 5 is a diagram showing an example of a total processing amount graph;
6A and 6B are diagrams for explaining the interpretation of the total processing amount graph, wherein FIG. 6A is a diagram illustrating the entire processing amount graph, and FIG. 6B is a diagram illustrating a work distribution in a work sequence at a certain time;
FIG. 7 is a diagram illustrating an example of a total processing amount graph in which the horizontal axis indicates the cumulative theoretical construction period;
FIG. 8 is a block diagram showing a configuration of a second embodiment (production line management device) of the present invention.
FIG. 9 is a block diagram showing a configuration of a third embodiment (production line state display device) of the present invention.
FIG. 10 is a flowchart showing a processing procedure of the production line status display device shown in FIG. 9;
FIG. 11 is a diagram showing an example of a total processing amount graph when there is a discontinuous part in the middle of a production line;
FIG. 12 is a diagram illustrating an example of a total processing amount graph when there is a discontinuous portion in the middle of a production line;
FIG. 13 is a diagram showing an example of a total processing amount graph when there is a discontinuous part in the middle of a production line;
FIG. 14 is a diagram showing an example of a three-dimensional total processing amount graph;
FIG. 15 is a diagram (flow curve) obtained by projecting the three-dimensional total processing amount graph shown in FIG. 14 along the operation axis.
FIG. 16 is a diagram in which the three-dimensionalized total processing amount graph shown in FIG. 14 is projected along a time axis.
17 is a diagram in which the three-dimensional total processing amount graph shown in FIG. 14 is projected along the total processing amount axis (work progress track of the work).
FIG. 18 is a diagram showing an example of a total processing amount graph for each product.
FIG. 19 is a block diagram showing a configuration of a seventh embodiment (production line management device) of the present invention.
FIG. 20 shows an example of production plan data.
FIG. 21 shows an example of a production command.
FIG. 22 is a diagram illustrating an example of a processing history.
FIG. 23 is a diagram showing an example of a work plan using a total processing amount graph.
[Explanation of symbols]
1. Total processing data collection unit
2. Conversion data storage
3: Total processing amount graph creation unit
4: Total processing amount graph display
20 ... Production line
21 ... Processing device
22 Information gathering unit
23 Display time input section
24 ... Total processing amount calculation unit
25: Total processing amount data storage unit
26 ... Production line status display
30 ... Total processing amount data collection unit
31 ... display time point information input section
32: Processing result data storage unit
33: Processing plan data storage unit
40: Production plan data input section
41: Production plan data storage unit
42 ... Plan execution part

Claims (2)

A production line state display device for displaying a state of a production line including a plurality of operations,
Means for storing the processing result data of each task, means for storing the processing plan data of each task, and collecting, for each task, total processing amount data processed up to a plurality of points of time displayed as a graph Means,
The total amount of processing for each work at each point in time, the work sequence of each work constituting a line on the horizontal axis, and the vertical axis shows the cumulative number of processes in each work, one graph, for each work Means for displaying the change in the processing amount for each time point, and displaying the change in the processing amount for each time point and the difference in the processing amount between the time points,
The means for collecting the total processing amount data reads the total processing amount from the total processing amount data processed up to the time according to the time point to be displayed as the graph, and calculates the total processing amount processed up to the time point. A production line status display device for collecting data. 2. The production line status display device according to claim 1, wherein said displaying means displays the total processing amount based on the processing plan data together with the total processing amount.

Images