JPH0241857A - Method and device for deciding proper work time in plural work - Google Patents

Abstract

PURPOSE:To improve working efficiency by deciding the priority relating to the work starting time of the work concerned based on the correlation of the allowable error range for a preset work start desired time on each work and the work start desired time of the work before and after thereof. CONSTITUTION:When the start or completion of a certain work is detected by a detection part 1, the estimation value on the work start desired time of the work concerned is operated based on the correlation of the allowable error range for the work start desired time in each work set in advance and the work start desired time of the work before and after thereof, at an arithmetic part 2. The priority on the work starting time of the work is decided by a priority deciding part 4 based on this arithmetic result, and the work start scheduled time is decided so that each work is not superposed at a work arrangement deciding part 5 according to this order. The decision of this work start scheduled time is renewed whenever each work is started or completed.

Description

[Detailed Description of the Invention] The present invention determines an appropriate scheduled start time for each task in a task in which multiple tasks are performed by a single means without duplication, and The present invention relates to a method and apparatus for determining the scheduled start time of each task each time each task is started or completed.

First of all, in this type of work, if multiple tasks are to be performed by a single method to avoid duplication, it is necessary to plan in advance and adjust the work time. Conventionally, when making this plan, in order to facilitate the creation of the plan, allowances were made for the work time, and waiting time for adjustment was set for each appropriate number of tasks. The plating process is completed after dipping in 20 to 30 tanks, but the order of the work and soaking time vary depending on the type of plating, and when producing many types of plating products in parallel, the work time is limited. In order to provide a margin or set a waiting time, a buffer tank for standby is always provided in the tank.

− ■ imposes γ to solve Therefore, according to conventional work, in addition to the working time, it is necessary to set a wasted slack time for each task or for an appropriate number of tasks, and the surplus time Once set before work, it remains unchanged until the work is completed, so it cannot flexibly adapt to sudden changes caused by internal or external factors during work, and has the disadvantage of extremely low work efficiency. .

In addition, when there is an extremely large number of tasks, adjusting by setting a margin time as described above may result in an extremely long working time, making it practically impossible, or due to fluctuations during each task, the adjustment by setting a margin time may differ from the original plan. The disadvantage is that the work becomes different. Furthermore, since it is necessary to maintain 61 spaces for standby such as a buffer tank, there is a disadvantage that the apparatus becomes large and occupies a large area.

It is an object of the present invention to provide a method and equipment TZ for determining the appropriate work timing for multiple tasks, which eliminates these drawbacks.

First, based on the allowable error range for the desired work start time predetermined for each work and the correlation with the desired work start time of the work before and after that, The priority order regarding the work start time is determined, and the scheduled work start time is determined according to this priority order so that each work does not overlap.

For example, regarding the tasks A to D for which the desired start time and the allowable error range are predetermined as shown in FIG. 4, the tasks A to D are plotted on the Y axis and Taking the desired time to start work based on the current time of the work for each work object for which the work time is 0.5 minutes as the axis, for each work object A to D, the desired time to start the work! IJI <X-coordinate value of the apex of the triangle) and the above-mentioned tolerance range (length of the base of the triangle) are illustrated, and if the working time for this task is shown as a rectangle on the X-axis, then tasks A and B, and Work B! It can be seen that the working hours of =D overlap.

In the present invention, as shown in FIG. 4, for example, the time difference between the desired start time of work is taken as the before-and-after correlation, and the evaluation value is the sum of the minimum value of the time difference and the self-permissible error range, By assigning work start times in ascending order, the priority order is determined as B, C, A, and D. As a result, as shown in FIG.
They can be arranged without overlapping each other.

The scheduled start time of each task is determined in advance each time each task is started or completed, and prior to the start or end of the next task.

For example, as shown in FIGS. 6 and 7 (al), two minutes have passed from the state shown in FIG. If a new task E is scheduled for 5 minutes later, the priority order for the desired start time of each task A, B, D, and E will be changed to B, A, E, D. As a result, as shown in FIG. 7(b) in the same way as described above, by determining the scheduled work start time according to the priority order, the work start time is determined according to the allowable work start time. They can be arranged within the range without overlapping each other.

Further, such determination of the scheduled start time of work is performed by a detection unit that detects that a certain work has started or finished;
When the detection signal from this detection unit is input, the tolerance range for the desired start time of each task determined in advance for each task and the correlation between the desired start time of the tasks before and after it are determined. an operation unit that calculates an evaluation value regarding the desired start time of the work based on the calculation unit; and a priority determination unit that determines the priority order regarding the desired start time of the work based on the evaluation value determined by the calculation unit. ,
This can be carried out by an apparatus comprising: a work time sequence determination unit that determines the scheduled start time of each work in accordance with the priority determined by the priority determination unit so that each work does not overlap.

When it is detected that a certain work has started or finished, the tolerance range for the desired start time of each work determined in advance and the correlation with the desired start time of the work before and after that are determined. Then, calculate the evaluation value regarding the desired start time of the work, determine the priority order regarding the work start time of the work based on this calculation result, and start the work according to this priority order so that each work does not overlap. In addition to determining the scheduled time, this determination of the scheduled start time of the work is updated each time each work is started or completed.

Hereinafter, a preferred embodiment will be described in which the present invention is applied to the transport work of the plated material in the plating work.The work in this embodiment is carried out using one transport carrier, as shown in Fig. 3. T indicates the work of transporting the plated material (not shown) from the respective processing tanks a5b, c, d, . . . during immersion to other processing tanks. Further, the processing tanks a, b, c, d, in which the transport carrier T transports the plated material,
..., the work order and work time are determined for each product type.

First, the configuration of an apparatus for determining the work start time will be explained based on FIG. 1.

The detection unit 1 includes processing tanks a, bc, and a transport carrier T.
It detects that the plating processing object is carried in or carried out to d..., and when the detection is made, a detection signal is sent to the calculation section 2. The calculation unit 2 receives input from the operation unit 3 in advance,
The evaluation value is calculated based on the desired time to complete immersion in the processing tank for each registered plating object, that is, the desired time to start carrying out work from the processing tank while being immersed by the transport carrier 'r, and its permissible error range. , the calculation results are sent to the priority order determining section 4. The priority order determining section 4 determines the priority order regarding the start time of carrying out work for each object to be plated based on the above calculation results, and the results are sent to the work arrangement determining section 5. The work sequence determination section 5 determines the scheduled start time of the unloading work based on the priority order, and this result is sent to the work time monitoring section 6. The work time monitoring section 6 monitors the arrival of the scheduled start time of the carrying out work of the transport carrier T determined for each plating object, and upon detecting this arrival, sends an operation command signal to the drive control section 7.

When the drive control section 8 receives the operation command signal, it outputs a drive control signal to the drive section of the carrier carrier r according to a pre-installed program. is carried out from a processing tank, for example, processing tank a, and transported to another new processing tank, for example, processing tank d.

Next, according to the flowchart shown in Fig. 2, when the work using the above-mentioned device starts! The method for determining tJ1 will be explained.

When the detection unit 1 detects that the transport carrier T has carried the plated material into a certain processing tank after the predetermined initial processing has been carried out (step 1.1, the calculation unit 2 determines that the transport carrier T For each object to be plated, an evaluation value is calculated based on the desired time to start carrying out work from the processing tank inputted from the operation unit 3 and its allowable error range (step 102, see FIG. 3); If the workpiece is not carried into the processing tank by the transport carrier T in the step 101, the standby state continues.When the above-mentioned calculation is completed, the process proceeds to step 103, and the priority determining unit 4 is activated based on the calculation result. In this step, the priority order regarding the start time of carrying out each plating object is determined (
(See Figure 4).

Next, the process proceeds to step 104, in which the work sequence determining unit 5 determines the scheduled start time of the unloading work in accordance with the determined priority order.At this time, for items to be plated whose work time overlaps, the priority order is lower. By shifting the scheduled start time of the unloading work and setting it as close to the desired start time of unloading as possible within the error tolerance and as early as possible, if the priorities are the same, the work time for both plating items will be heavy. Postponing it until it doesn't happen. When the scheduled time to start carrying out the plating process is determined in this manner, the process proceeds to step 105, where the work timing monitoring section 6 monitors the arrival of the determined scheduled time to start carrying out the work. When it is determined in step 105 that the scheduled time to start the unloading work has arrived, the process proceeds to step 106, where an operation command signal is sent from the work Q monitoring unit 6 to the drive control unit 7. In response to the control signal, the 1+η transport carrier T moves to a predetermined processing tank, carries out the immersed plated material, and transports it to another predetermined processing tank. This unloading work is carried out by the detection unit 1.
, and repeats the same action as described above.

In addition, although the above-mentioned embodiment explained the carrying out work of the conveyance carrier T in the plating processing work, it goes without saying that the work that falls under the present invention is not limited to the above-mentioned carrying out work.

Effects As is clear from the detailed explanation above, according to the present invention, each task is started within the tolerance range that is closest to the desired start time, thereby improving work efficiency in a series of tasks. This also eliminates the need for wasteful work and the space required for it, making it possible to downsize Vi'll and reduce the area it occupies.Furthermore, it allows for proper work, which improves quality. This has the effect of improving.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an apparatus in an embodiment of the present invention;
Figure 2 is a flowchart showing the determination method, Figure 3 is a schematic diagram showing the plating tank in which the transport carrier operates, and Figure 4 is a table showing the evaluation value calculation method and priority order determination based on the results. , Fig. 5 (al, (bl) is a graph showing the arrangement of work time based on the desired start time and priority order, Fig. 6 is a table showing the calculation method of evaluation value and the determination of priority order based on the result, FIG. 7 tag and fbl are graphs showing the arrangement of work time based on the desired start time and priority order. l...Detection unit 2...Calculation unit 4...Priority I constant determination. 5...Work sequence determination section 6...Work timing monitoring section T...Transportation carrier No. 1 Patent applicant Green System Co., Ltd.■'' Certain 31 下]■ Want■[下m寥、!5″ f9 (a) (b,) also 4-0

Claims (2)

[Claims] (1) In work where multiple tasks are performed by a single method without duplication, the tolerance range for the desired start time determined in advance for each task and the correlation with the desired start times of the tasks before and after it. Determine the priority order regarding the desired start date of the work based on the relationship,
In accordance with this order of priority, the scheduled start time of each task is determined so that each task does not overlap, and the scheduled start time of each task is determined each time each task is started or completed. A method for determining the appropriate work timing for multiple tasks, characterized in that it is carried out in advance before the start of the work. (2) A device that determines the appropriate timing for each task in a task in which multiple tasks are performed by a single means without duplication, and a detection unit that detects when a certain task is started or finished; When the detection signal from this detection unit is input, the relevant a calculation unit that calculates an evaluation value regarding the desired start time of the work; a priority determination unit that determines the priority order regarding the work start time of the work based on the evaluation value made by the calculation unit; An appropriate work timing determination device for multiple tasks, comprising: a task sequence determination unit that determines the scheduled start time of each task based on the determined priority order so that each task does not overlap.