JPH0419054A - Line production monitor - Google Patents

Abstract

PURPOSE:To facilitate production planning and work assisting planning by obtaining a work starting position and an expected work terminating position product by product so as to prepare a work position transition diagram, and displaying whether the expected work terminating position of each product exceeds a work termination limit position according to this work position transition diagram. CONSTITUTION:The expected work time is computed product by product by a work time computing means 1 from each number of workers. The length of each expected work line is computed by a line length computing means 2 from each expected work time and line speed. The work starting position of each product is connected to an expected terminating position obtained from each expected work line length to prepare a work position transition diagram by a plotting means 3. According to this work position transition diagram, a display device 4 displays whether the expected terminating position of each product exceeds a work termination limit position.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a monitoring device for monitoring line production of multiple products with different working times, and relates to a line production monitoring device that facilitates work support planning. .

[Conventional technology]

In a line assembly factory for high-mix, low-volume production, the work start position and finish limit position are determined for each stage of the assembly line. This is a physically determined location from the factory layout.

Then, the worker must complete the product assembly work between the work start position and the work end limit position. If the work does not end even after reaching the work end limit position, it may be necessary to stop the line and perform the remaining work. In particular, when the line speed is increased, even though the working time remains the same, the distance the product must travel on the line increases, and the work end position or work start position for the next product shifts backward accordingly. As a result, the work end limit position is often exceeded, and line stops occur more frequently.

Therefore, it is effective to monitor line production and provide work support before a line stop like the one described above occurs.

Traditionally, such line production was monitored manually, but since the workload for each product, that is, the work time multiplied by the number of workers, is different,
It is difficult to make production plans and work support plans.

(I!!Problem to be solved by the invention) Conventional line production monitoring devices are artificial as described above, so they cannot know when production planning or work support is required, and line stoppages occur. The problem was that it could not be prevented.

This invention was made by focusing on these problems, and it makes it easier to make production plans and work support plans, and it is possible to predict in advance when work support is required, thereby ensuring reliable work support. The purpose of the present invention is to provide a line production monitoring device that can prevent line stoppages.

[Means to solve the problem]

The line production monitoring device of the present invention includes a working time calculating means that calculates each expected working time for each product from the number of workers, and calculates each expected working line length from each expected working time and line speed. a line length calculation means; and a drawing means for creating a work position transition diagram by connecting the work start position of each product and the predicted end position obtained from each of the predicted work line lengths, The system is configured to display whether the expected end position of each product exceeds the work end limit position using a diagram.

[Effect]

In the line production monitoring device of the present invention, the expected work time and expected work line length are calculated for each product, and from these calculation results, a work position transition diagram connecting the work start position and expected end position for each product is created. is created. This work position transition diagram displays whether the expected end position of each product exceeds the work end limit position.

[Embodiment] FIG. 1 is a block diagram showing the main part configuration of a line production monitoring device according to an embodiment of the present invention. In the figure, 1 is a working time calculating means that calculates each expected working time for each product from each expected load (working time x number of people) and the number of workers, and 2 is a means for calculating each expected working time from each expected working time and line speed. line length calculation means for calculating the work line length;
3 is a drawing means for creating a work position transition diagram by connecting each product's work start position and the expected end position obtained from each of the above expected work line lengths with a straight line, and 4 is a work created by this drawing means 3. This is a display device that displays whether the expected end position of each product exceeds the work end limit position using a position transition diagram, and a CRT display device or others can be used.

Figure 2 shows an example of a work position transition diagram displayed on the display device 4, and is a graph that connects the work start position and work end position with a straight line for each product number N1 to N7. ing. The work position of point P in the figure is the aforementioned work end limit position.

The data required to create the above work position transition diagram include the line speed, stage length, expected load for each product, number of workers per worker, and the number of people working on the next product after completing the assembly work for one product. There is transit time between products before assembly work begins. Among these, the line speed and the number of workers per stage length are fixed values, but the expected load for each product and the travel time between products are estimated values based on past results.

Next, the operational procedure for creating the work position transition diagram shown in FIG. 2 will be explained in detail. For convenience, the product number N is used here.
Let the work start position of No. 1 be the reference (Om) of the line stage.

(a) First, calculate the expected working time for this product described above from the expected load of product number N1 and the number of workers, and then calculate the expected working line length by multiplying this by the line speed.

(b) Add the expected work line length to the work start position of product number N1 to find the expected end position.

(c) Plot the work start position and expected end position on the graph, and connect these two points with a straight line.

(d) Calculate the work start position for the next product from the distance between products on the line and the time required for a worker to move between products.

(e) Similarly, find the work start position and expected end position for product numbers N2 to N7 and write them on the graph.

As described above, the work position transition diagram shown in Figure 2 is completed by the steps (a) to (e), but in this Figure 2, the line stop is at the point where the predicted end position exceeds the work end limit position of point P. Since this is expected to occur, personnel from other nearby lines can be arranged in advance to support the work. Second
In the illustrated example, a line stop is expected at the work site for product number N4.

By creating and displaying or printing the work position transition map in this manner, it is possible to predict in advance when work support is required, and reliable work support can be implemented to prevent line stops. Furthermore, it becomes easier to formulate production plans and work support plans.

FIG. 3 is a flowchart showing an overview of the line monitoring operation described above. First, step 11 calculates the expected load of each product to be introduced based on the process plan, and step 12
A work position transition diagram is created from data such as line speed, stage length, and number of workers per worker. Next, in step 13, a work support plan is created for locations where the expected end position exceeds the work end limit position, and in step 14, work support is implemented.

Fig. 4 shows another flow of line monitoring operation. In this case, after the process plan is established in step 21, the expected load is calculated based on the load data sent from the load database in step 22. Perform calculations. Then, in step 23, a work position transition diagram is created and displayed from the calculation results, and in step 24, a work support plan is created and implemented.

It should be noted that each of the means shown in FIG. 1 can be constructed by a microcomputer, and is suitable as a computer control system, for example, when a residential building is divided into unit structures and then manufactured and assembled. That is,
In this case, each structural unit is produced in high quality and in small quantities according to specifications, and moreover, it is produced on the same line. Therefore, by using the line production monitoring device as described above, efficient and high productivity can be obtained.

(Effects of the Invention) As described above, according to the present invention, a work position transition diagram is created by determining the work start position and expected end position for each product,
This work position transition diagram displays whether the expected end position of each product exceeds the work end limit position, making it easier to create production plans and work support plans.
It is possible to predict in advance the time when work support is required, which has the effect of providing reliable work support and preventing line stoppages.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the main part configuration of a line production monitoring device according to an embodiment of the present invention, FIG. 2 is an explanatory diagram showing an example of a work position transition diagram displayed on the display device of FIG. 3 and 4 are flowcharts showing an outline of the line monitoring operation of the apparatus shown in FIG. 1. 1...Open during work calculation means 2...Line length calculation means 3...Drawing means 4...Display device

Claims (1)

[Claims] In a monitoring device that monitors line production of multiple products with different working times, there is a working time calculation means for calculating each expected working time for each product from the number of workers, and a working time calculating means for calculating each expected working time for each product from the number of workers, and a means for calculating each expected working time from each expected working time and line speed. a line length calculation means for calculating the expected work line length of each product; and a drawing means for creating a work position transition diagram by connecting the work start position of each product and the expected end position obtained from the respective expected work line lengths. A line production monitoring device, characterized in that the work position transition diagram displays whether the expected end position of each product exceeds the work end limit position.