JPH1029140A - Method of observing each machining process in production line and system therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To detect promptly the ratio of total sums of operation times of each operation element to the production interval times, and also to indicate these data promptly, against a plurality of operation elements in one operation element of a production line. SOLUTION: When a production line constitutes more than one operation element (input 1, input 2, input 3), the starting time of each input (Tw1-Tw4) and operating times (T2A, T2B, T3A, T3B) are measured, production interval times (Tw5) of the operation element are measured and ratio of total sums of operation time of more than one operation elements (T2A+T2B, T3A+T3B) to an interval time (Tw5) is computed. Further, scattering data are indicated, and also the starting time of each operation element versus time is indicated as the frequency.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for monitoring the operation state of a plurality of work elements constituting a predetermined one process element individually in a production line including many process elements, and The work start time varies,
The present invention relates to a method and an apparatus for monitoring an individual work element in a process element of a production line, wherein a variation in a ratio of each work element to a production interval can be visually monitored.

[0002]

2. Description of the Related Art Usually, a production line is constructed by combining a number of process elements. And each process element is often comprised of a plurality of work elements. Now, the production interval time of an individual process element in a production line is an important factor indicating the productivity in the entire production line. The production interval time is represented by a combination of individual work elements constituting individual process elements. For example, in order to improve productivity in a production line, it is necessary to start by analyzing the operation time of each work element in each process element.

[0003] With respect to a production plan (hereinafter referred to as a production plan) counted by a predetermined interval time, how close the actual production number is to the production plan is important for achieving the production plan. Element. Hereinafter, the ratio of the number of actual productions to the production plan will be referred to as the availability. How to improve the operability leads to an increase in production efficiency. By the way, the working time of a normal worker is different from that of the mechanical equipment, and may be short or long. This is because these are governed by various factors such as the physical condition and mood of the worker, the posture of the worker when taking out parts that reach the equipment, and the like.

Therefore, in order to improve the operability in the production line, the production interval time, the work start time and the work time of each work element are detected and analyzed for each process element, and the results are analyzed. It must be communicated to the person or reflected in the structure of the equipment.

[0005] By the way, monitoring of the production interval time, work start time, and work time of the conventionally known process elements is performed by a watcher pressing a stopwatch while watching the work of the worker, and by interval time, work start time, and work time. It was measuring time.

[0006]

However, pressing the stopwatch after visually judging the operation of the worker by the observer causes further variations in the production interval time, the work start time, the work time, and the like. There was a risk of doing so. That is, errors and malfunctions are unavoidable in the manual work using the stopwatch. Also, 1
The individual operations constituting one process element include complex operations, and it has been difficult for a monitor to surely monitor the break of each of these operations in the process element.

Further, there is a case where the work time is extremely short depending on the work contents of the process elements, and when this is monitored by a spot stopwatch, the error becomes large. In addition, the conventional monitoring of work time by a supervisor does not allow immediate data processing. It was not possible to analyze, examine, and reflect the results in production.

Accordingly, an object of the present invention is to improve the drawbacks caused by the conventionally known manual monitoring of process elements and to immediately detect individual interval times, work start times, and work times in process elements. At the same time, it is an object of the present invention to provide a method and apparatus for processing work time in a process element, which can immediately process and display the data.

[0009]

The feature of the present invention lies in the following constitution. That is, in a production line composed of a number of process elements, one process element constituting the production line is composed of two or more work elements, and a production interval time of the process element is measured. Measure the work time of two or more work elements to be performed,
Calculating the ratio of the work time of each work element to the production interval time, displaying the ratio for each work element, and monitoring the variation of the work time for each work element. A method for monitoring individual work elements in process elements of a line.

Another feature of the present invention is as follows. In a production line composed of a large number of process elements, one process element constituting the production line is composed of two or more work elements, and a production interval time of the process element is measured, and the two or more work elements are measured. Measuring the work start time, displaying the work start time for each work element on the axis of the production interval time, and monitoring the variation in the work start time for each work element. How to monitor individual work elements in an element.

Another feature of the present invention lies in the following configuration. In a production line composed of a large number of process elements, one process element constituting the production line is composed of two or more work elements, the production interval time of the process element is measured, and the operation is performed within the interval time. The work time of two or more work elements is measured, the ratio of the work time of each work element to the production interval time is calculated, and the ratio is displayed for each work element to display the work time of each work element. While monitoring the variation, the work start time of the two or more work elements is measured, and the work start time of each work element is displayed on the axis of the production interval time to monitor the work start time of each work element. A method of monitoring an individual work element in a process element of a production line, characterized by comprising:

Another feature of the present invention is as follows. In a production line composed of a number of process elements, the production line is constituted, one process element composed of two or more work elements, a measuring unit for measuring a production interval time of the process element, A measuring unit for measuring the working time of two or more working elements, a calculating unit for calculating the ratio of the working time of each working element to the production interval, and displaying the ratio for each working element. A display unit for indicating a variation in work time for each work element, wherein the monitor for individual work elements in a process element of a production line is characterized by monitoring a work time variation for each work element.

Another feature of the present invention is as follows. In a production line including a number of process elements, one process element that constitutes the production line and includes two or more operation elements, a measuring unit that measures a production interval time of the process element, and the two or more operation elements A measuring unit that measures the work start time of the work, a display unit that displays the work start time of each work element on the axis of the production interval time,
A monitoring device for individual work elements in a process element of a production line, wherein the work start time variation of each work element is monitored.

Another feature of the present invention is as follows. In a production line composed of a number of process elements, the production line is constituted, one process element composed of two or more operation elements, a measuring unit for measuring a production interval time of the process element, A measuring unit for measuring the working time of two or more working elements, a calculating unit for calculating the ratio of the working time of each working element to the production interval time, and displaying the ratio for each working element. A display unit for indicating the variation of the work time for each work element, a measuring unit for measuring the work start time of the two or more work elements, and a display for displaying the work start time for each work element on the axis of the production interval time A process element of a production line, wherein the process time variation of each work element is monitored and the work start time variation of each work element is monitored. Monitoring apparatus of the definitive individual work elements.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described below with reference to FIGS. The production line is formed by combining a number of process elements (1... K... N). FIG. 1 shows the k-th process element. The process element k does not necessarily perform only one operation, but includes, for example, an operation in which two or more operations are collectively regarded as one operation.

In FIG. 1, the operation in the process element k is detected by a sensor (not shown), and the signal is input to the input unit 1A of the analyzer 1. The input signal is arithmetically processed by the arithmetic unit 1C together with the signal of the clock unit 1B, and is displayed on the display unit 1D on the one hand and stored in the storage unit 1E on the other.

FIG. 2 shows an example of the arithmetic processing in the arithmetic unit 1C. In this example, the work element in the process element k is detected and input by three sensors. Referring to FIG. 2, when time T is 0, the signal of input 1 is turned on for time T1. The rise at time T1 is defined as the starting point of the production interval time.

When the time T has elapsed by Tw1, the signal of the input 2 is turned on for T2A. Further, when the time T has elapsed by Tw2, the signal of the input 3 is turned on for T3A time. Further, when the time T has elapsed by Tw3, the signal of the input 2 is turned on for T2B time. Subsequently, when the time T has elapsed by Tw4, the signal of the input 3 is turned on for the time T3B. Then, when the time T has elapsed by Tw5, the signal of the input 1 is turned on again. This Tw5 is the production interval time in the process element k.

Although the work in the process element k can be grasped and analyzed by only the display of FIG. 2 described above, in the present invention, the above data is preferably processed as follows. That is, the sum (T2A + T2B) of the operation times T2A and T2B of the work element 2 displayed by the input 2 is calculated, and this is calculated as a ratio M2 (%) to the production interval time Tw5. M2 (%) = {(T2A + T2B) / Tw5} × 100 Further, the sum (T3A + T3B) of the operation times T3A and T3B of the work element 3 displayed by the input 3 is calculated, and this is calculated as a ratio M3 ( %). M3 (%) = {(T3A + T3B) / Tw5} × 100

There are various possible formats for displaying the above calculation results. One example is to simply monitor numerical values or monitor the frequency by plotting them on a graph. Can be considered. These are all displayed on the display unit 1D of the analyzer 1.

In addition to the above-mentioned movable ratio, the operation start time (Tw1, Tw2, Tw3, Tw) of each operation element in the process element.
The variation in 4) is also one of the major factors for knowing production efficiency. In the present invention, displaying the variation of the work start time of each work element as a histogram as shown in FIG. 3 is effective for data analysis and examination. That is, the time axis (production interval time Tw5) is set on the vertical axis, and the frequency of the work start time (Tw1, Tw2, Tw3, Tw4) is set on the horizontal axis. Then, when this is displayed as a bar graph, it becomes as shown in FIG. Here, each of Tw1, Tw2, Tw3, Tw4
It can be interpreted that the higher the peak of the bar graph of the group, the smaller the variation, and the flatter the bar graph, the more the variation.

In the above description, when a process element is referred to, not only one specific operation of one process of a production line but also, for example, two or three related operations in one process are collectively referred to as one process element. Is also included. In addition, the present invention includes not only installation in the entire production line but also installation in only a predetermined number of necessary process elements. Further, various data are stored in the storage unit 1E, and can be taken out at any time as needed.

[0023]

According to the present invention constructed and operated as described above, the following effects can be obtained. The work can be analyzed and examined for each individual process element constituting the production line, and the production control of a partial process becomes possible. or,
Since the data processing is performed online and immediately, the data can be reviewed at any time as needed. It is possible to analyze and study process elements consisting of multiple operations. Higher data accuracy than manual monitoring.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating one embodiment of the method and apparatus of the present invention.

FIG. 2 is a diagram showing a flow of work with respect to time in a predetermined process element.

FIG. 3 is a diagram showing an example of a histogram of analysis data of work start time according to the present invention.

[Explanation of symbols]

 Reference Signs List 1 analyzer 1A input unit 1B clock unit 1C calculation unit 1D display unit 1E storage unit k process element

Claims (6)

[Claims] In a production line comprising a number of process elements, one process element constituting the production line is composed of two or more work elements, and a production interval time of the process element is measured. The work time of two or more work elements performed in time is measured, the ratio of the work time of each work element to the production interval time is calculated, and the ratio is displayed for each work element to display the work element. A method of monitoring individual work elements in a process element of a production line, characterized by monitoring variations in work time for each operation. 2. In a production line comprising a number of process elements, one process element constituting the production line is composed of two or more work elements, and the production interval time of the process element is measured. The work start time of the above work elements is measured, and the work start time of each work element is displayed on the axis of the production interval time to monitor the variation of the work start time of each work element. For monitoring individual work elements in process elements of a production line. 3. In a production line comprising a number of process elements, one process element constituting the production line is composed of two or more work elements, and a production interval time of the process element is measured. The work time of two or more work elements performed in time is measured, the ratio of the work time of each work element to the production interval time is calculated, and the ratio is displayed for each work element to display the work element. In addition to monitoring variations in work time for each work element, measuring the work start time of the two or more work elements, displaying the work start time for each work element on the axis of the production interval time, and starting work for each work element A method for monitoring an individual work element in a process element of a production line, characterized by monitoring time variations. 4. In a production line comprising a number of process elements, the production line is constituted, one process element comprising two or more work elements, a measuring section for measuring a production interval time of the process element, and A measuring unit for measuring the working time of two or more working elements performed within the interval time, a calculating unit for calculating the ratio of the working time of each working element to the production interval time, And a display unit for displaying the work time variation for each work element, and displaying the work time variation for each work element, and monitoring the work time variation for each work element. Monitoring device. 5. A production line comprising a number of process elements, wherein said production line is constituted, one process element comprising two or more work elements, a measuring section for measuring a production interval time of said process elements, A measuring unit that measures the work start time of two or more work elements, a display unit that displays the work start time of each work element on the axis of the production interval time,
A monitoring device for individual work elements in a process element of a production line, wherein the work start time variation of each work element is monitored. 6. A production line comprising a number of process elements, the production line comprising one process element comprising two or more work elements, a measuring section for measuring a production interval time of the process element, A measuring unit for measuring the working time of two or more working elements performed within the interval time, a calculating unit for calculating the ratio of the working time of each working element to the production interval time, A display unit for displaying the variation of the work time for each work element, a measurement unit for measuring the work start time of the two or more work elements, and a work start time for each work element, And a display unit for displaying on the axis, wherein the variation of the work time for each work element is monitored, and the variation of the work start time for each work element is monitored. Monitor the individual work elements in the process elements.