JPH074744B2 - Method and device for determining proper work time in plural works - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention determines an appropriate scheduled work start time for each work in a work for performing a plurality of works by a single means so as not to overlap each work, and The present invention relates to a method and apparatus for determining the scheduled work start time each time each work is started or finished.

2. Description of the Related Art Generally, in this type of work, when a plurality of works are performed so as not to overlap by a single means, it is necessary to plan in advance and adjust the work time. Conventionally, in making this plan, in order to facilitate the creation of the plan, a work time is given a margin, or a waiting time for adjustment is set for every appropriate number of works. For example, generally in plating work, it is completed through the work of immersing in 20 to 30 tanks, but the order of the work and the immersion time are all different depending on the type of plating, and when various types of plated products are produced in parallel, A buffer buffer tank is always provided in the tank in order to allow a sufficient working time and set a waiting time.

Therefore, according to the conventional work, in addition to the work time, it is necessary to set a wasteful spare time for each work or for each appropriate number of works. Once set before, it does not change until the work is completed, so it is not possible to flexibly adapt to sudden changes due to internal and external factors during the work, and there is a drawback that the work efficiency is extremely poor. Also, when the number of operations is extremely large, the adjustment by setting the allowance time as described above makes the operation time extremely long, which makes it practically impossible. It has the drawback of being a different task. Furthermore, since it is necessary to secure a standby space such as a buffer tank, there is a drawback that the device becomes large and the occupied area becomes large.

An object of the present invention is to provide a method and apparatus for determining an appropriate work time in a plurality of works in which these drawbacks are solved.

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

For example, as shown in FIG. 4, for the works A to D in which the desired work start time and the allowable error range thereof are predetermined, as shown in FIG. 5 (a), the works A to D are assigned to the Y axis. , X-axis is the desired work start time based on the present time in the work time of 0.5 minutes for each work object, and the desired work start time (top of the triangle) is set for each work object A to D. X-axis value) and the allowable error range (length of the base of the triangle) are shown in the figure, and when the work time in this work is shown by a rectangle on the X-axis, work A and B, and work B and D It can be seen that the work time overlaps. In the present invention, as shown in FIG. 4, for example, the time difference of the desired start time of work is taken as the front-rear correlation, and a value obtained by adding the minimum value of the time difference and the own allowable error range is set as the evaluation value.
By assigning the work start time from the smallest one, the priority order is determined as B, C, A, D. Thus, as shown in FIG. 5 (b), by determining the work start timing according to the priority order, the scheduled work start timings can be arranged within the allowable range of each work without overlapping each other.

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

For example, as shown in FIG. 6 and FIG. 7 (a), work C is completed after 2 minutes have passed from the state of FIG. If a new work E that is one minute after is scheduled, the priority of each work A, B, D, E for the desired work start time is newly set to B, A, in the same manner as described above. It is decided in the order of E and D. As a result, as described above, as shown in FIG. 7B, by determining the scheduled work start time according to the priority order, the scheduled work start times overlap each other within the allowable range of each work. You can arrange without.

Further, such a work start scheduled time is determined by a detection unit that detects that a work is started or ended,
When the detection signal from this detection unit is input, it is based on the allowable error range with respect to the desired work start time in each work and the correlation between the desired work start time of the work before and after the work. 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 desired start time of the work based on the evaluation value calculated by the calculation unit, and the priority determination unit. It can be performed by an apparatus provided with a work time arrangement determining unit that determines a scheduled work start time so that the works do not overlap according to the priority determined by the order determining unit.

When it is detected that a work has started or finished, it is based on the correlation between the allowable error range for the desired work start time for each predetermined work and the desired work start time before and after the work. Then, the evaluation value for the desired work start time of the work is calculated, the priority regarding the work start time of the work is determined based on this calculation result, and the scheduled work start time is determined according to this priority order so that each work does not overlap. The work start scheduled time is updated every time each work is started or finished.

Examples Hereinafter, preferred examples in which the present invention is applied to a work for transporting a plated product in a plating process will be described. As shown in FIG. 3, the work in this embodiment is carried out from each of the different processing tanks a, b, c, d ... In which one transport carrier T is immersing a plated product (not shown). It means the work to carry out to the processing tank. In addition, the carry-out carrier T
In the processing tanks a, b, c, d, etc. for transporting the plated products, the work order and work time are determined for each product type.

First, the configuration of the device for determining the work start time will be described with reference to FIG.

The detection unit 1 includes processing tanks a, b, c, d ...
It is to detect that the plated object is carried in or out, and when the detection is made, a detection signal is sent to the arithmetic unit 2. The arithmetic unit 2 is input from the operating unit 3 in advance, and the desired completion time of the immersion of each registered plated product in the processing tank, that is, the desired start time of the unloading operation from the processing tank being immersed by the carrier T and its allowance The evaluation value is calculated based on the error range, and the calculation result is sent to the priority order determination unit 4. The priority order determination unit 4 determines the priority order regarding the start time of the work of unloading each plated product based on the calculation result, and the result is sent to the work arrangement determination unit 5. The work arrangement determination unit 5 determines the scheduled start time of the unloading work based on the priority order, and the result is sent to the work time monitoring unit 6. The work time monitoring unit 6 monitors the arrival of the scheduled start time of the work to carry out the carrier T determined for each plated product, and when detecting the arrival, it sends an operation command signal to the drive control unit 7. When the drive control unit 8 receives the operation command signal, it outputs a drive control signal to the drive unit of the carrier T in accordance with a pre-installed program. The drive control signal causes the carrier T to target the object to be plated. Processing tank, for example processing tank a
Then, it is moved to be loaded into another new processing tank, for example, processing tank d.

Next, the method for determining the work start time by the above-mentioned apparatus will be described with reference to the flowchart shown in FIG.

When the detection unit 1 detects that the transport carrier T has carried the plated product into a certain processing tank after a predetermined initial process is performed (step 101), the transport carrier T should be transported in the calculation unit 2. For each plated product, an evaluation value is calculated from the desired start time of the work to be carried out from the processing tank and the permissible error range input from the operation unit 3 in advance (step 102, see FIG. 3). Further, in step 101, when the work carrier does not carry the work object into the processing tank, the standby state is continued. When the above calculation is completed, the process proceeds to step 103, and the priority determining unit 4 determines the priority regarding the unloading start time of each plated product based on the calculation result (see FIG. 4). Next, in step 104, the work arrangement determining unit 5 determines the scheduled start time of the unloading work in accordance with the determined priority. At this time, for plated products that overlap in work time, although the priority order is inferior, the scheduled start time for unloading work is shifted so that it is as close as possible to the desired start time for unloading within the error tolerance range, and as early as possible. If the same priority is set, both plating products are shifted until the work time does not overlap.
When the scheduled unloading operation start time of each plated product is determined in this way, the process proceeds to step 105, and the operation timing monitoring unit 6 monitors the arrival of the determined unloading operation start scheduled time. When it is determined in step 105 that the scheduled start time of unloading work has come, the process proceeds to step 106, in which an operation command signal is sent from the work time monitoring unit 6 to the drive control unit 7, and the drive control unit 7 outputs the operation command signal. In response to the control signal, the carrier T moves to a predetermined processing tank, carries out the immersed plated product, and carries it to another predetermined processing tank. This carry-out work is detected by the detection unit 1, and the same operation as described above is repeated.

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

Effects As will be apparent from the detailed description above, according to the present invention, each work is started within the allowable error range that is closest to the desired start time of work. Therefore, work efficiency in a series of works can be improved. In addition, unnecessary work is not required and space for it is not required. Therefore, the size of the device can be reduced, the occupied area can be reduced, and moreover, proper work can be performed to improve quality. That is the effect.

[Brief description of drawings]

FIG. 1 is a block diagram of an apparatus according to an embodiment of the present invention,
FIG. 2 is a flow chart showing the same determination method, FIG. 3 is a schematic diagram showing a plating treatment tank in which the carrier carries out work, and FIG. 4 is a table showing the calculation method of evaluation values and the determination of priority order based on the results. 5 (a) and 5 (b) are graphs showing the arrangement state of the work time based on the desired work start time and the priority order, and FIG. 6 shows the calculation method of the evaluation value and the determination of the priority order based on the result. Tables (a) and (b) of FIG. 7 are graphs showing the arrangement state of the work time based on the desired work start time and the priority order. 1 ... Detection unit, 2 ... Calculation unit, 4 ... Priority determination unit,
5 ... Work sequence determination unit, 6 ... Work time monitoring unit, T ...
Carrier

Claims (2)

[Claims] 1. A work for performing a plurality of works by a single means so as not to overlap with each other, an allowable error range with respect to a predetermined work start desired time for each work, and a work start desired time before and after the work. Based on the evaluation value obtained by adding the minimum value of the time difference, the priority order for the work start desired time of the work is determined so that the priority of the work with the smaller evaluation value has priority, and each work is performed according to this priority order. The work start scheduled time of each work is determined so that there is no overlap, and the work start scheduled time of each work is determined.
A method for determining an appropriate work time in a plurality of works, which is performed each time each work is started or finished before the start of the next work. 2. A device for determining an appropriate work time of each work in a work in which a plurality of works are performed by a single means so as not to overlap with each other, and a detection unit for detecting the start or end of a work. When a detection signal from this detection unit is input, a permissible error range with respect to a predetermined work start desired time for each work and a minimum value of the time difference between the work start desired time of the work before and after the work In addition, based on the evaluation value calculated by this operation unit and the operation unit that calculates the evaluation value related to the desired start time of the work, the operation start request of the operation is requested so that the order of the work with the lowest evaluation value has priority. A priority order determination unit that determines the priority order regarding the timing, and a work sequence that determines the scheduled work start time of each work based on the priority order determined by this priority order determination unit so that each work does not overlap. Suitability working time determination device in a plurality work characterized by comprising comprises a tough, the.