JP2000200104A - Operation control method for equipment and device therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To control the operation of equipment so as to simultaneously stop the operation for the equipment belonging to a control group without regulation of an operation delay time in the case of entering a non-production time, stop the operation as quickly as possible with the operation delay time corresponding to the regulation of the operation delay time for the equipment belonging to the control group with the regulation of the operation delay time and promptly start production in the case of ending the non-production time and entering the production time. SOLUTION: When the non-production (rest) start time comes, the respective pieces of the equipment are stopped with the delay of the operation delay time set for the respective control groups 1-5. Also, in the case of ending the non- production time, for the equipment requiring time to be a normal operation state, the operation of the equipment is started at the point of time earlier for operation start preparation time set for the respective control groups 1-5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the operation of equipment constituting a production facility and a control device therefor, and more particularly to controlling the stop and start of equipment during non-production time represented by a break time. About what you do.

[0002]

Conventionally, production equipment such as machines and equipment installed in factories is provided with a switch for each equipment, and a worker turns the switch on and off to switch the equipment. Start and stop were performed. Even during non-production hours such as a break time represented by lunch, the switch is turned off at the start of the break and turned on at the end of the break.

However, in a steam supply apparatus in which water is heated by an electric heater or a gas burner to generate steam, and the steam is sent to a processing plant by an air blower, the water is heated at the same time as the start of the break time. The air blower may be stopped, but it is preferable to stop the air blower after the start of the break time in order to discharge the steam filled in the processing site and quickly bring the atmosphere to the same atmosphere as the outside.

[0004] Further, since it takes a certain amount of time to heat the water to generate steam, if the heating of the water and the operation of the air blower are started simultaneously with the end of the break time, In spite of the break time being over and the production time being entered, steam cannot be sent and production may not be possible. For this reason, in order to be able to start production immediately after the break time, it is necessary to start water heating before the end time of the break time.

Accordingly, in the case of the steam supply device exemplified above, the heating of water is stopped at the same time as the start of the break time,
After a while, the air blower is stopped. Then start heating the water a few minutes before the end of the break time, and at the beginning of the production time, in order to make sure that the steam is coming to the processing site, the air blower should be heated at the same time as the water heating or slightly more. You have to start the operation early, but this is very cumbersome and cumbersome.

[0006] For this reason, it is necessary to be able to produce immediately at the start of production after the end of the break time, and it is often the case that the equipment is not stopped and the switch is kept on even during the break time. And energy wasted.

[0007] The present invention has been made in view of the above circumstances, and its object is to firstly enter the non-production time,
The operation can be stopped as soon as possible with a delay time corresponding to the equipment, and secondly, when the non-production time ends and the production time starts, the operation of the equipment is started so that the production can be started immediately. Thirdly, when entering the non-production time, the operation can be stopped as soon as possible with a delay time corresponding to the equipment, and when the non-production time ends and the production time is entered. An object of the present invention is to provide a device operation control method and a control device for controlling the operation of a device so that production can be started immediately.

[0008]

According to the present invention, the non-production start time is grasped based on the contents stored in the operation plan storage means, and the equipment is controlled based on the contents stored in the control storage means. The operation stop delay time is grasped, and each device is controlled to be stopped with a time delay of the operation stop delay time from the time when the non-production start time is reached.

According to this means, when a non-production start time such as a break time is reached, the operation of the equipment whose operation delay time is "0" is immediately stopped. The operation of the device requiring the delayed operation is not stopped immediately, but is stopped when the device is delayed by the delay time from the non-production start time. For this reason, energy can be saved without the trouble of the operation stop operation.

According to a second aspect of the present invention, the length of the non-production time or the non-production end time is grasped based on the contents stored in the operation plan storage means, and the equipment is stored based on the contents stored in the control storage means. The start-up preparation time of operation start is grasped, and each device is controlled so as to start operation before the non-production end time by the start preparation time.

According to this means, with respect to the equipment which takes a long time to become ready for production, the operation is started just before the end of the non-production time (such as the end of a break) by the operation start-up preparation time. You. When the non-production time ends and the production start time is reached, the operation of the equipment that does not require such a preparation operation is started. Therefore, even if the operation of the device is stopped for energy saving, the time for starting the operation is not lost.

[0012] According to a third aspect of the present invention, the non-production start time is set based on the storage contents of the operation plan storage means.
While grasping the length of the non-production time or the non-production end time, the operation stop delay time and the operation start start-up preparation time of the container are grasped based on the storage contents of the control storage means,
The equipment is stopped with a delay of the operation stop delay time from the time when the non-production start time is reached, and is controlled so as to start operation only before the start of the non-production time by the operation start preparation time. It becomes.

According to this means, when a non-production start time such as a break time is reached, the operation of the device having the operation stop delay time of "0" is immediately stopped, and the operation of the device requiring the delayed operation is performed in the non-production time. The operation of the device is stopped at a time point delayed by the delay time from the start time. In addition, for equipment that takes time to become ready for production, operation starts only before the start-up preparation time from the end of non-production time, and for equipment that does not require such preparation operation, When the non-production time ends and the production start time comes, the operation is started. In this way, during the non-production time, each device is kept stopped as much as possible, so that waste of energy can be prevented.

According to a fourth or twentieth aspect of the present invention, each device is divided into any one of a plurality of control classes having different operation stop delay times, and operation stop is controlled for each control class. It is characterized by having. The invention according to claim 5 or 21 is configured such that each device is divided into any one of a plurality of control classes having different operation start-up preparation times, and operation start is controlled for each control class. It is characterized by the following. Claim 6 or 2
According to the invention described in Item 2, each device is divided into any one of a plurality of control classes in which the combination of the operation stop delay time and the operation start-up preparation time is different, and the operation stop and start are controlled for each control class. It is characterized in that it is a configuration that is performed. According to such a means, even if a large number of devices to be controlled exist, a plurality of devices can be included in each control class, so that devices in the same class can be collectively controlled, The configuration of the control device can be simplified.

According to a seventh aspect of the present invention, when the non-production start time comes, the device side is notified of the operation stop timing, and the device side completes the stop preparation operation based on the notification. The apparatus is configured to stop the operation with a time delay of the operation stop delay time. The above-described stop preparation operation may be executed in order to complete the machining of the workpiece whose equipment is being machined, as in the invention according to claim 8 or 24.

According to this means, for example, if the device is stopped while the device is processing a work, the work being processed may be defective. In such a case, according to the above-described means, even when a certain device is at the non-production start time, the stop preparation operation, in the above example,
If the processing for the work being processed has not been completed, the device is not stopped, and the device is stopped when the processing of the work is completed, which may result in a defective work. Disappears.

According to the ninth or twenty-fifth aspect of the present invention, a predetermined device among the devices whose operation delay time has elapsed is
It is configured to determine whether or not the operation can be stopped in relation to the operation state of another device, and to stop the operation of the predetermined device if it is determined that the operation can be stopped. It is characterized by the following.

For example, when the machine is a cutting machine and the main spindle is rotated by a motor while cutting a workpiece with a hydraulic chuck to cut, if the operation of the hydraulic pump is stopped while the motor is being operated. Then, the clamp of the work rotated by the main shaft comes off. In such a case, according to the above means, the operation stop of the hydraulic pump can be performed on condition that the operation of the drive motor of the spindle is stopped, so that the clamp of the work is released during the rotation of the spindle. Failure can be prevented.

According to a tenth aspect of the present invention, it is preferable that, among the devices whose operation start-up preparation time has elapsed, a predetermined device is in a state in which operation can be started in relation to the operation state of other devices. It is characterized in that it is configured to determine whether or not the operation of the predetermined device is started when it is determined that the operation can be started.

For example, in the case of a hot air supply device in which air heated by a heater is blown by a fan, if the heater is energized in a state where the fan motor is not operated, the temperature of the heater becomes abnormally high and adversely affects its life. . In such a case, according to the above-described means, the heater can be operated (heat generation) under the condition of the operation of the fan motor, and occurrence of a problem such as adversely affecting the life of the heater can be prevented.

[0021] The invention according to claim 11 or 27 is characterized in that a predetermined device among the devices is configured to perform a break-in operation during a start-up time for starting operation. It is. For example, in a machine tool such as a grinder that requires extremely high processing accuracy, a break-in operation is performed before starting normal operation in order to satisfy the processing accuracy. In the case of such a device, according to the above means, the running-in operation can be completed before the start of the production time.

According to a twelfth aspect of the present invention, a plurality of work patterns are stored in the operation plan storage means, and a non-production start time is grasped by selecting a desired one from the plurality of work patterns. It is characterized by the following. In the invention according to claim 13 or 29, a plurality of work patterns are stored in the operation plan storage means, and the control means selects a desired work pattern from the plurality of work patterns to thereby reduce the length of non-production time. Alternatively, it is characterized by grasping the production start time. In the invention according to claim 14 or 30, a plurality of work patterns are stored in the operation plan storage means, and the control means selects a desired one of the plurality of work patterns, thereby obtaining a non-production start time, It is characterized by grasping the length of the non-production time or the production start time.

According to the above-described means, it is possible to easily cope with a change in the working system at the production site.

The invention according to claim 15 or 31 is characterized in that the work pattern stored in the operation plan storage means can be changed to an arbitrary pattern. According to this means, even if the work pattern is changed, it can be easily dealt with.

In the invention according to claim 16 or 32, it is determined that no workpiece is loaded in the equipment for a time longer than the total time of the operation stop delay time and the operation start-up preparation time during the production time. When the device is present, the operation of the device is stopped with the operation stop delay time. According to this means, it is possible to further improve the energy saving effect.

[0026]

FIG. 1 shows a first embodiment of the present invention.
A description will be given with reference to FIG. FIG. 3 shows various facilities 1 to 6 and a control device 7 for controlling the operation of the facilities 1 to 6.
It is shown. Equipment 1, Equipment 3, Equipment 6 are motors 8 ~
10 is a driving source, the facility 2 includes an air blower 11, the facility 4 includes a heater 12 for generating steam,
The equipment 5 comprises a steam supply device 13 having an air blower for sending the steam generated in the equipment 4 to the processing site. In addition,
These facilities 1 to 6 are for explanation of the embodiment and do not constitute a specific production system.

The control device 7 includes a control unit 1 as control means.
4, operation unit 15, program storage unit 16, operation plan storage unit 17 as operation plan storage unit, control classification storage unit 18 as control storage unit, temporary storage unit 19 for temporarily storing various data, clock circuit A clock unit 20, an input unit 21, an output unit 22, a communication unit 23, and the like are provided as clock means for performing a timekeeping operation based on a clock signal generated by the device and clocking the current time. The control device 7 includes a device called a programmable controller or a sequencer.
U, and each of the storage units 16 to 19 are configured by a ROM, a RAM, and the like.

A personal computer (not shown) can be connected to the communication section 23 of the control device 7. In this embodiment, an operation plan and a control classification for indicating the control contents are performed by the personal computer. Various data are input. Then, the input operation plan data and control classification data are stored in the operation plan storage unit 17 and the control classification storage unit 18, respectively.

Here, the operation plan data is data relating to production time and non-production time, and in this embodiment, data relating to a break. As shown in FIG. 4, the operation plan 1 is a break in the morning and a break at lunch. And the operation plan 3 which is a break in the afternoon are indicated by the start time of the break and the duration of the break. In addition,
In FIG. 4, the start time of each break and the time length of the break are indicated by the non-production start time and the non-production time. In the following description, the start time and the length of each break time are indicated by the non-production time. It will be referred to as the start time and the non-production time.

The control classification data indicating the contents of the control relates to the stop and start of the operation.
Data for determining the operation stop time and the operation start time. In this embodiment, the control classification data classifies, for example, the operation stop delay time and the operation start-up preparation time in each of the operation plans 1 to 3 into five types of control patterns. The operation stop delay time and the operation start start-up preparation time are stored for the first to third operations. In addition, the operation stop delay time refers to a time during which the operation of the equipment is continued from the time when the non-production start time is reached, and the operation start-up preparation time refers to a time required from the start of operation to a time when the production becomes possible.

The operation control pattern created by such a combination of the operation plan and the control classification is such that, in the case of the operation plan 2 (break for 45 minutes from 12:00), the devices classified into the control classification 1 are: Devices that are stopped for 45 minutes from the non-production start time (12:00) and that are classified into control category 2 are those that are stopped for 35 minutes after 5 minutes after the non-production start time, and devices that are classified as control category 3 are: Devices that are stopped for 30 minutes from 5 minutes after the non-production start time, devices that are classified into the control category 4 are stopped for 25 minutes from 10 minutes after the non-production start time, and devices that are classified into the control category 5 are non-productive. The operation is controlled so that the operation is stopped for 20 minutes from 10 minutes after the start time.

An operation panel 24 as input operation means is connected to the input section 21. The operation panel 24 includes a mode selection switch 25, a setting switch 26, a display 27, and the like. The mode selection switch 25 is
The user selects one of the manual and collective control modes, and selects a work system and a time adjustment mode. here,
The automatic control mode is performed by comparing the coincidence between the time of the clock unit 20 and the non-production start time of the operation plan storage unit 17.
A mode for recognizing the start of production and controlling the operation of each of the facilities 1 to 6 according to both the data of the operation plan and the control classification, and the operation plan and the control classification only when an operation switch provided separately from the manual mode is turned on. If there is a control device for controlling the operation of each of the equipments 1 to 6 according to both data, and a control device for controlling a different equipment group from the collective control mode, a mode for controlling the operation of the equipment 1 to 6 together with the control device is there.

The work system selection mode is a mode in which a plurality of operation plan data are stored when a plurality of operation plan data are stored, and the time adjustment mode is the current time measured by the clock unit 20. Is a mode for correcting the current time of the clock unit 20 when is different from the standard time. Then, when each mode is selected, the operation plan data can be selected and the time can be corrected by operating the setting switch 26. Selection contents, setting contents, and the like are displayed on the display 27.

On the other hand, the control section 14 controls the whole of the control device 7 in accordance with the program stored in the program storage section 16, and stores various types of information stored in the operation plan storage section 17 and the control classification storage section 18. Data, clock part 2
0 is read and given to the arithmetic unit 15, an operation instruction signal is output to each of the drive circuits 28 to 33 via the output unit 22 based on the arithmetic result of the arithmetic unit 15, and a stop instruction signal Output.

The control section 14 supplies the above-mentioned operation command signal and stop command signal to the first port O1 of the output section 22 for the control category 1 and the output section 22 for the control category 2.
, And the control classifications 3 to 5 are respectively applied to the third to fifth ports O2 to O5 of the output unit 22.

Of the ports of the output section 22, the motor 8 and the air blower 11 of the equipment 1 and 2 are connected to the first port O1 via drive circuits 28 and 29, respectively, and the equipment 3 is connected to the second port O2. Are connected via a drive circuit 30. Hereinafter, the third to fifth ports O
The heater 12 of the facility 4, the steam supply device 13 of the facility 5, and the motor 10 of the facility 6 are respectively connected to the driving circuit 31 through O5.
Through 33.

Here, the motors 8 and the air blowers 11 of the equipments 1 and 2 connected to the first port O1 may end the operation at the start of the break and start the operation at the end of the break. The operation of the motor 9 of the equipment 3 connected to the second port O2 may be stopped at the start of the break. However, since the operation is not immediately enabled by the start of the operation, the preparation for about two minutes before the end of the non-production time is performed. It requires driving. Thus, the control target device 8
13 indicates the operation stop delay time and the operation start-up preparation time of each of the operation plans 1 to 3 from among the control classifications 1 to 5 shown in FIG. A control class that matches or approximately matches the delay time and the start-up preparation time is connected to a port of the output unit 22 corresponding to the control class.

Next, the operation of the control unit 7 will be described with reference to the flowchart of FIG. 1, assuming that the operation of each of the facilities 1 to 6 has been started by a start switch (not shown). While the control device 7 is powered on, the control unit 14 performs steps S1 and S16 that constitute the loop 1.
Is repeatedly executed. In this loop 1,
The control unit 14 first determines the control mode set by the operation panel 24 in step S2. When the control mode is set to the manual mode or the batch mode, the control unit 14 stores in the temporary storage unit 19 whether or not the operation switch is turned on. I do.

Next, after reading the current time of the clock unit 20 in step S3, the control unit 14 enters a loop 2 consisting of step S14 from step S4, and first accesses the temporary storage unit 19 in step S5. To determine the state of the control mode.
To read the non-production start time and the non-production time of the operation plan 1 and determine whether or not the current time is within the non-production time zone of the operation plan 1 (from the non-production start time to the end time) (step S6) If the mode is the manual mode or the batch mode, the temporary storage unit 19 is accessed to determine whether the operation switch is turned on (step S6).
7). If the current time is not in the non-production time zone of the operation plan 1 in the automatic mode and the operation switch is not turned on in the manual mode or the batch mode ("NO" in step S6 or "NO" in step S7) NO)), the control unit 14 returns to step S4 again, and executes the second loop 2
Execute

In the second execution of the loop 2, the control unit 14
Reads the non-production start time and the non-production time of the operation plan 2 and stores whether the current time is within the non-production time zone of the operation plan 2, or accesses the temporary storage unit 19 to store the ON state of the operation switch. It is determined whether or not it has been performed. If the current time is not in the non-production time zone of the operation plan 2 and the ON state of the operation switch is not stored, the control unit 14
Determines “NO” in step S6 or S7, returns to step S4, and executes the third loop 2.

Then, the control unit 14 executes the third loop 2
, The current time is changed to the operation plan 3 in the same manner as described above.
Whether or not it has entered the non-production time zone of
9 to determine whether or not the operation switch is ON. If "NO", the process exits the loop 2 in step S14 and proceeds to step S15. In this step S15, the control unit 14 sets the output signals of the ports O1 to O5 of the output unit 22 as they are and returns to step S15.
From 16, the process returns to step S <b> 1, and the above-described operation is repeatedly performed.

Now, assuming that the automatic mode is set, the current time of the clock unit 20 is set to one of the operation plans 1 to 3, for example, 10:00 which is the non-production start time of the operation plan 1.
It is assumed that 0 minutes has elapsed. Then, the control unit 14 determines “YES” in step S6, and enters the loop 3 including steps S8 to S13.

In the loop 3, the control unit 14 first proceeds to step S9, accesses the control classification storage unit 18, reads the delay time of the operation plan 1 in the control classification 1, and reads the delay time from the non-production start time to the present. It is determined whether or not the elapsed time has reached the delay time. In this case, since the delay time of the operation plan 1 in the control category 1 is “0” minutes, the control unit 14 determines “YES” in step S9,
In the next step S10, each port O1 to O5 of the output unit 22
Among them, the output information is set so that the first port O1 corresponding to the control class 1 is turned off.

Thereafter, the control unit 14 proceeds to step S11, and determines whether the time from the current time to the end of the non-production time is the start-up preparation time of the operation plan 1 in the control category 1. Judge. here,
Since the non-production time of the operation plan 1 has just started, the control unit 14 determines “NO” in the step S11, shifts to the step S13, returns to the step S8 from the step S13, and returns to the step S8. Execute the processing of

In the processing of the second loop 3, the control unit 14 accesses the control classification storage unit 18 in step S9, reads the delay time of the operation plan 1 in the control classification 2, and reads the delay time from the non-production start time to the present. It is determined whether or not the elapsed time has reached the delay time. Also in this case, since the delay time of the operation plan 1 in the control category 2 is “0” minutes, the control unit 14 determines “YES” in step S9,
In the next step S10, each port O1 to O5 of the output unit 22
Among them, the output information is set so that the second port O2 corresponding to the control category 2 is turned off.

Then, the control unit 14 determines in the next step S1
In step S8, "NO" is returned to step S8, and the process of the third loop 3 is executed. Thereafter, the processes of the fourth and fifth loops 3 are sequentially executed in the same manner, and from the non-production start time. It is determined whether or not the elapsed time has become the delay time of the control classes 3 to 5, and in the case of "YES", among the ports O1 to O5 of the output unit 22, it corresponds to the control class of "YES". Set the output information of the port to off.

As a result of executing the processing of loop 3 consisting of steps S8 to S13 for each of the control categories 1 to 5, the output information at 10:00 is off at ports O1 to O3, and off at ports O4 and O5. Then it remains on. Then, after executing the loop 3 five times, the control unit 14 exits the loop 2 and enters the step S14.

Although the execution of the loop 2 for the operation plan 1 has been completed as described above, since the execution of the loop 2 for the operation plans 2 and 3 has not been completed yet, the control unit 14 proceeds from step S14 to step S14. Returning to S4, the process of the second loop 2 for the operation plan 2 is executed, and after the execution of the second loop 2, 3
The processing of the second loop 2 is executed. This second and third
In the processing of the second loop 2, the current time 10:00 is not the non-production start time zone for the operation plans 2 and 3, so the control unit 14 determines “NO” in step S 6.
And exits from loop 2.

When the third execution of the loop 2 is completed, the control unit 14 proceeds to step S15, where
Based on the output information set by the execution of the loop 3, the outputs of the first to third ports O1 to O3 of the output unit 22 are switched from the operation command signal to the stop command signal,
The operation command signals for the fourth and fifth ports O4 and O5 remain unchanged. Thereby, the motor 8 of the equipment 1
The air blower 11 of the facility 2, the motor 9 of the facility 3, and the heater 12 for generating steam of the facility 4 are stopped at the same time as the non-production start time of 10:00, and the steam supply device 13 of the facility 5 and the motor of the facility 6 are stopped. 10 continues the operation.

Then, the control unit 14 returns to step S1, executes steps S2 and S3 similar to those described above, and then starts execution of the first loop 2 for the operation plan 1. Then, the control unit 14 first sets “Y” in step S6.
ES ", and the loop 3 for each of the control categories 1 to 5 is executed in the same manner as described above. If the current time is two minutes after the non-production start time of the operation plan 1 (10:02), the control unit 1
4 indicates that the output information of the ports O1 to O3 is turned off by executing the first to third loops 3, and in the fourth and fifth executions of the loop 3, the operation delay time of the control classifications 4 and 5 is 2 minutes. Therefore, the output information of the ports O4 and O5 is also set to off.

Thereafter, the control unit 14 exits from the loop 3 and the loop 2 and moves to step S15, where
The output signals of the first to third ports O1 to O3 are kept as stop command signals, and the fourth and fifth ports O1 to O3 are not changed.
The output information of 4 and O5 is switched from the operation command signal to the stop command signal. Thus, the operation of the steam supply device 13 of the facility 5 and the operation of the motor 10 of the facility 6 are stopped.

Now, the current time is five minutes before the end of the non-production time of the operation plan 1, ie, the operation start-up preparation time (5) of the equipments 5 and 6 before 10:10 which is the production start time.
Minutes), and it is 10:05, the previous time. Then, when executing the loop 3 for the operation plan 1 five times in total, the control unit 14 determines whether or not the operation stop delay time has elapsed at the time of executing the loop 3 for the control categories 1 to 3 in step S9. In both cases, the result is “YES”, and step S10 is performed.
The output information of the control categories 1 to 3 is set to OFF, and it is determined as “NO” in step S11 to determine whether or not the next operation start preparation time has been entered. Leave.

On the other hand, when the loop 3 for the control categories 4 and 5 is executed, the control unit 14 determines "YES" in step S9 for determining whether or not the operation stop delay time has elapsed. In step S10, the output information of the control categories 4 and 5 is set to off. In step S11, it is determined whether or not the subsequent operation start-up time has come.
S ", and the output information of the control categories 4 and 5 is set to ON in step S12.

Therefore, by executing the loop 3, the output information for the control categories 1 to 3 is turned on while the output information for the control categories 4 and 5 remains off. Then, the control unit 1
4 exits the loops 3 and 2 and proceeds to step S15, where the fourth and fifth ports O4 and O5 of the output unit 22 corresponding to the control classifications 4 and 5 are changed to operation command signals. Thereby, the preparatory operation of the steam supply device 13 of the facility 5 and the motor 10 of the facility 6 is started.

Then, when the clock unit 20 measures 10:08 which is two minutes before the end time of the non-production time, the control unit 1
4 turns on the output information for the control categories 2 and 3 when the loop 3 for the operation plan 1 is executed, and turns on the second and third ports O2 and O3 of the output unit 22 when the step S15 is executed. Change to operation command signal. Thereby, the air blower 11 of the equipment 2 and the equipment 3
The operation of the motor 9 is started.

Further, when the clock unit 20 measures 10:10 which is the end time of the non-production time, the control unit 14 turns on the output information for the control category 1 when the loop 3 for the operation plan 1 is executed. And step S15
Is executed, the output of the first port O1 of the output unit 22 is changed to an operation command signal. Thus, the operation of the motor 8 of the facility 1 is started. Equipment 1 by the control unit 14 as described above
6 are also performed during the non-production hours of the operation plans 2 and 3, whereby the facilities 1 to 6
Operation stop and operation start are performed according to the time chart shown in FIG.

As described above, according to the present embodiment, the operation plan 1
When the non-production start time of ~ 3 is reached, the operation of the equipment having the operation stop delay time "0" is immediately stopped, and the equipment requiring the delayed operation is not immediately stopped,
The operation of the device is stopped at a time point delayed by the delay time from the non-production start time. In addition, for a device that takes time to be ready for production, the operation is started only before the operation start-up preparation time before the end of the non-production time. When the non-production time ends and the production start time is reached, the operation of the equipment that does not require such a preparation operation is started. Thus, during non-production hours,
Since the operation of each device is stopped as much as possible, compared to the case where the operator operates the on / off switch to stop or start the operation, the operation is troublesome and troublesome, and the energy of the production equipment is wasted. Use can be prevented.

Further, since each device is divided into five control classes 1 to 5, and the devices belonging to each control class are collectively controlled to stop and start operation, the number of ports of the output section 22 can be reduced. At the same time, the configuration of the control becomes relatively easy, and the cost can be reduced.

A second embodiment of the present invention will be described with reference to FIGS. For the sake of simplicity, the same parts in FIG. 7 as those in FIG. 3 showing the first embodiment are denoted by the same reference numerals, and only different parts will be described. Equipment control device 34
In addition to starting and stopping the operations of the facilities 1 to 6 at the start and end of the operation, the apparatus also controls the entire factory facilities such as the operation of the work transport conveyor connecting the facilities 1 to 6. The equipment control device 34 includes a control unit 35, an input unit 36, an output unit 37, and the like. The input unit 36 is connected to an output port 06 of the output unit 22 as an output unit of the control device 7, and the output unit 37 Is connected to an input unit 21 as input means of the control device 7.

The input unit 21 of the equipment control unit 34 includes an operation detection unit (not shown) for detecting the operation states of the motors 8 to 10, the air blower 11, the heater 12, and the steam generator 13 of each of the equipments 1 to 6. And a work detector (not shown) for detecting the presence of a work in each of the facilities 1 to 6 is connected.

In this configuration, as shown in the flowchart of FIG. 6, when the non-production start time comes ("YES" in step S6), or when the operation switch is turned on ("YES" in step S7), the control device 7 control unit 14
Outputs a signal indicating that the operation stop timing has come from the output unit 22 of the control device 7 to the input unit 36 of the equipment control device 34 (step S7-1).

Then, the control unit 35 of the equipment control unit 34
Determines whether a work exists in each of the facilities 1 to 6, based on a detection signal of a work detection unit provided in each of the facilities 1 to 6. When a work exists in any of the facilities 1 to 6, the control unit 35 of the facility control device 34 outputs a signal to the input unit 21 of the control device 7 to the effect that the work is not in a stoppable state. 6, if no work exists, the control unit 35 of the equipment control device 34
A signal to the effect that it is in a stoppable state is output to the input unit 21 of.

The control section 14 of the control device 7 executes step S7
After the execution of -1, the signal provided to the input unit 21 is read from the output unit 37 of the equipment control device 34 (step S7-).
2) It is determined whether or not the content of the signal is a signal indicating that the stop is possible (step S7-3). When the signal from the equipment control device 34 is a signal indicating that the stop is not possible, the control unit 14 determines “NO” in step S7-3 and returns to step S7-2. "NO" in the step S7-3, and the step S7-2 are repeated until the signal of the step S7 becomes a signal indicating that the signal can be stopped. Then, when a signal indicating that the vehicle is in the stoppable state is received, the control unit 14 determines “YES” in step S7-3, shifts to step S8, and selects one of the control categories 1 to 5. Wait for the operation stop delay time to elapse. It should be noted that whether or not the vehicle can be stopped is determined by the control device 7.
The side may obtain information from the equipment control device 34 or from the work detection unit and make the determination by the control unit 14.

When the operation delay time of any one of the control classes 1 to 5 has elapsed, the control unit 14 reads a signal given to the input unit 21 from the output unit 37 of the equipment control unit 34 (step S1). S9-1), it is determined whether or not the content of the signal is a signal indicating that the stop condition is satisfied for the device to be stopped (step S9-2). For example, if the operation of the steam supply device 13 is stopped while the heater 12 is operating, excessive heating by the heater 12 is performed. Is stopped. If such a condition is satisfied for the device after the elapse of the operation stop delay time, the signal provided to the input unit 21 is a signal indicating that the stop condition is satisfied.
2 is "YES" and the process moves to step S10 to stop the operation of the corresponding device. In addition, similarly to the determination of the stoppable state, regarding the establishment / non-satisfaction of the stop condition, the control device 7 obtains information on the operation / stop of each of the devices 8 to 13 from the equipment control device 34 so that the control device 7 The determination may be made by the control unit 14.

On the other hand, if there is a control class that has become the operation start-up preparation time after the non-production time has elapsed (step S
11 "YES"), the control unit 14
A signal provided to the input unit 21 from the output unit 37 is read (step S11-1), and it is determined whether or not the content of the signal is a signal indicating that the operation start condition has been satisfied for the device under the corresponding control classification. Judge (Step S11-
2). For example, in the above example, when the heater 12 is operated, the steam supply device 13 needs to be operated. If such a condition is satisfied for a device under control classification that has become the operation start-up preparation time, the input unit 21
Is a signal to the effect that the operating conditions are satisfied, the control unit 14 determines in step S11-2 that “YE
S ", the process proceeds to step S12, and the operation of the corresponding device is started. Regarding establishment / non-satisfaction of the stop condition, the control device 7 sends a signal from the equipment control device 34 to each of the devices 8 to 1.
The control unit 14 of the control device 7 may make the determination so as to obtain the operation / stop information of No. 3.

As described above, according to the present embodiment, after confirming that the equipment side is in the operation stoppable state, the operation is actually stopped after the elapse of the operation stop delay time. In a device whose operation stop timing arrives while processing a workpiece, the processing of the work can be continued (stop preparation operation). For this reason, it is possible to prevent a trouble such as a stop of the equipment during the processing of the work and a failure of the work.

In some cases, a series of processing by a plurality of facilities completes a processing step for a workpiece. In such a processing step, if the processing is temporarily interrupted in the middle of the processing step, a desired accuracy cannot be often obtained. In a plurality of facilities that perform such a series of processing, the point in time when there is no work flowing from the facility in the preceding process can be regarded as a state in which the equipment of the facility in the subsequent process can be stopped. As a result, even if there is no work being processed in the post-processing equipment for performing the series of processing, if there is a work being processed in the equipment for the pre-processing that performs the series of processing, the equipment of the equipment for the post-processing is not stopped. In this way, it is possible to prevent a problem such as a defective work from occurring.

According to the present embodiment, the operation of the device is stopped only when the operation stop condition is satisfied.
It is possible to prevent the steam supply device 13 from being stopped while the heater 12 is energized, thereby causing the heater 12 to become abnormally high in temperature. As another example where it is advantageous to determine the operation stop condition, in a facility that performs processing in a furnace heated to a high temperature, if a work stays in the furnace at a high temperature, the quality of the work is adversely affected. In such a case, the operation stop condition is determined to be that the work has been carried out of the furnace. This can prevent the work from staying in the high-temperature furnace.

As another example, when a spindle is rotated by a motor while a workpiece is being clamped by a cutting machine by a hydraulic chuck and cutting is performed, the condition for stopping the operation of the hydraulic pump is determined by stopping the operation of the drive motor for the spindle. Set forth in This prevents the operation of the hydraulic pump from being stopped while the motor is being operated, and prevents a problem that the work being rotated by the main shaft is disengaged from being clamped.

Further, according to the present embodiment, the operation of the equipment is started only when the operation start condition is satisfied.
The heater 12 is energized while the steam supply device 13 is stopped,
It is possible to prevent a problem that the heater 12 becomes abnormally high temperature. The operation stop condition is not limited to the relationship between the steam supply device 13 and the heater 12, and can be appropriately determined according to various types of equipment.

FIGS. 8 and 9 show a third embodiment of the present invention. This embodiment is designed to cope with a change in the work pattern. The operation plan storage unit 17 can store a plurality of work patterns, in this case, nine work patterns. Here, a procedure for registering a work pattern will be described. Now, the work pattern to be registered is 3
0 minutes, start time 8:30, morning break 10:00 to 10
1 minute from 12:00, 1 hour from 15:00 afternoon break
It is assumed that 0 minute, the closing time is 17:30, and the overtime is 1 hour.

In order to register this as pattern 1, the creation screen of pattern 1 displayed on the display 27 as shown in FIG. 8 while referring to the pattern code table for day shift shown in FIG. Fill in. That is, early 30 minutes corresponds to code 1 in the early entry column of the pattern code table for day shift, and starting time 8:30 corresponds to code 1 in the entry time column of the pattern code table for day shift. The setting switch 26 of the display 27 is operated, and the rapid advance 3 is displayed in the square portion of the broken line shown in the "early" portion of the pattern 1 creation screen of the display 27.
The code “1” at 0:30 and the code “1” at 8:30 at the start time are sequentially inputted in the square portion of the broken line shown in the “0” code and the “start” portion. Next, from 10 am in the morning, the code "0" in the break column before meal in the pattern code table for day shift corresponds to code "0", and the break time of 10 minutes also corresponds to code "0". Is operated, the code "0" at the break start time of 10 o'clock and the break time of 10 minutes are displayed in the square portion of the broken line shown in the "rest" part before the "day" part of the pattern 1 creation screen of the display 27. Are sequentially input.

Similarly, the code "0" for the noon meal start time 12:00 and the code "2 for the one hour meal time" are displayed in the square portion of the broken line shown in the "day" part of the pattern 1 creation screen. Are entered in order, and the code “0” at the break start time 15:00 and the code of the break time 10 minutes are placed in the square portion of the broken line shown in the “rest” part after the “day” part of the pattern 1 creation screen. Enter "0" in order. Further, the closing time 17 is displayed in the square portion of the broken line shown in the "end" portion of the pattern 1 creation screen.
The code “1” for 1 hour and the code “2” for one hour of overtime work are sequentially input to the square part of the broken line shown in the “1” and “remaining” parts.

The input contents are stored in the operation plan storage unit 1.
When the setting switch 26 is operated so as to be stored in the memory 7,
Early morning 30 minutes, start time 8:30, morning break 10:00 to 10 minutes, meal 12:00 to 1 hour, afternoon break 15:00 to 10 minutes, closing time 17:30, overtime 1 hour work pattern It is stored in the operation plan storage unit 17. When a desired work pattern is designated by the setting switch 26 from the plurality of work patterns thus set, the control unit 14 obtains the operation plans 1 to 3 based on the designated work pattern. Note that a plurality of setting switches 26 are provided, and a predetermined switch is operated according to the content of the operation. FIG. 10 shows the above-described operation plan and a work pattern obtained by coding the operation plan.

The work pattern once registered can be modified or changed by operating the setting switch 26. The registration, correction and change of the work pattern can be freely performed even during the production time. When a plurality of control devices 7 exist, the work pattern is registered in one control device 7 and the control device 7
By controlling the remaining control devices 7, the work patterns can be omitted from the other control devices 7. If you have a night shift,
This is stored in the operation plan storage unit 17 in the same manner as described above using the night shift pattern code table of (b).

As described above, by coding and setting the work pattern, the setting of the work pattern is simplified, and the memory usage of the operation plan storage unit 17 can be reduced. The ability to register multiple work patterns reduces the need for setting new and cumbersome data even when the work pattern changes.

The pattern code table of FIG. 9 may be printed in an instruction manual or the like, or may be stored in a storage unit and displayed on the display 27 when used. It should be noted that the present invention is not limited to the embodiment described above and shown in the drawings, and the following expansion or modification is possible. The operation plan is not limited to three. The operation plan is
It may be composed of a non-production start time and a non-production end time. The non-production start time may be replaced with the start time and the length of time from the start time. The control unit 14 automatically determines the control classification of the device from the operation delay time and the operation start rising preparation time of each device, and controls the output signal of the port to which the device is connected according to the control classification. You may do it. The configuration may be such that the operation delay time and the operation start-up preparation time are automatically corrected according to the ambient temperature and humidity detected by the sensor.

Depending on the device, the customary operation may be performed during the operation start-up preparation time. For example, in a machine tool such as a grinder that requires extremely high processing accuracy, a break-in operation is performed before starting normal operation in order to satisfy the processing accuracy. In the case of such a device, according to the above means, the running-in operation can be completed before the start of the production time.

If the operation of the equipment can be stopped at a time other than the non-production start time depending on the state of the equipment, the equipment may be stopped by receiving a stop signal (signal) from the equipment side. good. For example, the operation of the equipment in the post-process in which it is expected that the work does not come from the equipment in the previous process for a predetermined time or more by the detection operation of the work detection unit or the like is stopped. Alternatively, when a production line is constructed by a plurality of facilities, an abnormality occurs in a facility in a preceding process, and an operation delay time and a start-up preparation time of a facility in a subsequent process are required until the abnormal state is restored. When it is determined that a time longer than the total time is necessary, the equipment in the post-process is stopped.

The control device 7 may be configured to control the stop of the equipment only at the start of the non-production time. The control device 7 may be configured to control the operation start of the equipment only at the end of the non-production time.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the present invention and is a flowchart showing the contents of control.

FIG. 2 is a time chart

FIG. 3 is a block diagram showing the overall electrical configuration.

FIG. 4 is a conceptual diagram of operation plan data.

FIG. 5 is a conceptual diagram of control classification data.

FIG. 6 is a view corresponding to FIG. 1, showing a second embodiment of the present invention.

FIG. 7 is a diagram corresponding to FIG. 3;

FIG. 8 is a diagram showing a work pattern according to a third embodiment of the present invention.

FIG. 9 is a code table used when setting a work pattern.

FIG. 10 is a diagram showing an operation plan and a work pattern obtained by coding the operation plan.

[Explanation of symbols]

1 to 6 are facilities, 7 is a control device, 8 to 13 are devices, 14 is a control unit (control unit), 17 is an operation plan storage unit (operation plan storage unit), 18 is a control classification storage unit (control storage unit). ,
Reference numeral 20 denotes a clock unit (clock unit), 21 denotes an input unit (input unit), and 22 denotes an output unit (output unit).

Claims (32)

[Claims] 1. A method for controlling the operation of a plurality of devices, wherein a non-production start time is grasped based on the contents stored in an operation plan storage means, and the operation of the devices is stopped based on the contents stored in a control storage means. An operation control method for a device, comprising: grasping a delay time, and controlling each device to be stopped with a time delay of the operation stop delay time from the time when the non-production start time is reached. 2. A method for controlling the operation of a plurality of devices, comprising: grasping a length of a non-production time or a non-production end time based on a storage content of an operation plan storage means; Operation start-up preparation time of the device is grasped on the basis of the operation start-up preparation time, and each device is controlled to start operation by the operation start-up preparation time before the non-production end time. Method. 3. A method for controlling the operation of a plurality of devices, comprising: grasping a non-production start time and a length of the non-production time or a non-production end time based on the contents stored in an operation plan storage means. Grasping the operation stop delay time and operation start-up preparation time of the device based on the storage content of the control storage means, and, for each device, the operation stop delay time from the time when the non-production start time is reached. An operation control method for a device, wherein the operation is stopped with a time delay, and the operation is controlled to start only before the operation start-up preparation time before the end of the non-production time. 4. The apparatus according to claim 1, wherein each of the devices is divided into any one of a plurality of control classes having different operation stop delay times, and operation stop is controlled for each control class. Item 6. An operation control method for a device according to item 1 or 3. 5. The apparatus according to claim 1, wherein each of the devices is divided into one of a plurality of control classes having different operation start-up preparation times, and operation start is controlled for each control class. The method for controlling operation of a device according to claim 2 or 3, wherein the operation is controlled. 6. Each of the devices is divided into any of a plurality of control classes in which a combination of an operation stop delay time and an operation start-up preparation time is different, and operation stop and start are controlled for each control class. The operation control method for a device according to claim 3, wherein the operation control method is performed. 7. When the non-production start time comes, the device side is notified of an operation stop timing, and the device side completes a stop preparation operation based on the notification, and the operation stop delay time 7. The operation control method for a device according to claim 1, wherein the operation of the device is stopped with a time delay of: 8. The apparatus operation control method according to claim 7, wherein the stop preparation operation is executed to complete machining of a workpiece that is being machined by the machine. 9. A state in which a predetermined device among the devices for which the operation stop delay time has elapsed is determined to be in a state in which operation can be stopped in relation to an operation state of another device, and a state in which the device can be stopped. The operation control of an apparatus according to any one of claims 1, 3, 4, 6, 7, and 8, wherein the operation of the predetermined apparatus is stopped when it is determined that Method. 10. A determination is made as to whether a predetermined device is in a state in which operation can be started in relation to an operation state of another device, among the respective devices for which the operation start-up preparation time has elapsed, 7. The operation of the device according to claim 2, wherein the operation of the predetermined device is started when it is determined that the operation can be started. Control method. 11. The apparatus according to claim 2, wherein a predetermined device among the devices is configured to perform a break-in operation during the operation start-up preparation time. The operation control method for a device according to any one of claims, 6, and 10. 12. The non-production start time is stored by storing a plurality of work patterns in the operation plan storage means, and selecting a desired one from the plurality of work patterns. 1, 3, 4, 6, 7, 8,
10. The operation control method for a device according to any one of items 9. 13. A plurality of work patterns are stored in the operation plan storage means, and the control means selects a desired work pattern from the plurality of work patterns to thereby determine the length of non-production time or the start of production. The operation control device for a device according to any one of claims 2, 3, 5, 6, 10, and 11, wherein the time is grasped. 14. A plurality of work patterns are stored in the operation plan storage means, and the control means selects a desired one of the plurality of work patterns to thereby determine a non-production start time and a non-production time. 7. The operation control device for a device according to claim 3, wherein the length of time or the production start time is grasped. 15. The device operation control method according to claim 12, wherein the work pattern stored in the operation plan storage means can be changed to an arbitrary pattern. 16. In a production time, when there is an apparatus which is determined to have no work to be loaded for a time longer than a total time of an operation stop delay time and an operation start-up preparation time, among the apparatuses, The device according to claim 3, wherein the operation of the device is stopped with the operation stop delay time.
An operation control method for an apparatus according to any one of claims 6 and 14. 17. An apparatus for controlling the operation of a plurality of devices, comprising: a clock unit for measuring a current time; an operation plan storage unit for storing a non-production start time; and an operation stop delay time for each of the devices. Control storage means, and control means for controlling the operation of each of the devices, wherein the control means controls each of the devices from the time when the current time grasped from the clock means becomes the non-production start time. An operation control device for a device, wherein the operation is controlled so as to stop operation with a time delay of a stop delay time. 18. An apparatus for controlling the operation of a plurality of devices, comprising: a clock unit for measuring a current time; an operation plan storage unit for storing a length of a non-production time or a non-production end time; A control storage unit for storing an operation start-up preparation time; and a control unit for controlling the operation of each of the devices. An operation control device for a device, wherein the operation is controlled so as to start operation before the operation start-up preparation time before the end time. 19. An apparatus for controlling the operation of a plurality of devices, comprising: clock means for measuring the current time; non-production start time; and operation plan storage for storing the length of the non-production time or the non-production end time. Means, for each of the devices, a control storage unit for storing an operation stop delay time and an operation start-up preparation time; and a control unit for controlling the operation of each of the devices. From the time when the current time grasped from the clock means becomes the non-production start time, the operation is stopped with a time delay of the operation stop delay time, and the operation start preparation is more advanced than the end of the non-production time. An operation control device for a device, wherein the operation is controlled so that the operation is started just before the time. 20. The control storage device stores a plurality of control classes having different operation stop delay times, wherein each of the devices is divided into any of the control classes, and the operation stop is controlled for each control class. 2. The configuration according to claim 1, wherein
20. An operation control device for a device according to 7 or 19. 21. The control storage device stores a plurality of control classes having different start-up start-up preparation times, and the respective devices are classified into any of the control classes, and the operation start is performed for each control class. 20. The device operation control device according to claim 18, wherein the device is controlled. 22. The control storage device stores a plurality of control classes having different combinations of an operation stop delay time and an operation start-up preparation time, and each of the devices is divided into any of the control classes. 20. The apparatus according to claim 19, wherein the operation stop and start are controlled for each control classification.
An operation control device for the described device. 23. An output unit for notifying the device side of an operation stop timing when the non-production start time comes, and when the device side completes a stop preparation operation based on the notification, the device Input means for receiving a notification from the device side, the control means, when the input means receives a notification from the device side that the stop preparation operation has been completed, a time delay of the operation stop delay time 17. The system according to claim 17, wherein the operation is stopped by the following.
22. The operation control method for a device according to any one of 9, 20, and 21. 24. The device operation control according to claim 23, wherein the notification that the stop preparation operation has been completed is a notification that the predetermined device has completed the processing of the workpiece being processed. apparatus. 25. The control means determines whether or not a predetermined device among the devices for which the operation stop delay time has elapsed is in a state in which operation can be stopped in relation to an operation state of another device. 17. The apparatus according to claim 17, wherein the operation of the predetermined device is stopped when it is determined that the predetermined device can be stopped.
An operation control device for the device according to any one of 3, 24. 26. The control device according to claim 26, wherein, among the devices for which the operation start-up preparation time has elapsed, a predetermined device is in a state in which operation can be started in relation to an operation state of another device. 20. The apparatus according to claim 19, wherein the apparatus is configured to start the operation of the predetermined device when it is determined that the apparatus is ready for operation.
An operation control device for the device according to any one of 21 and 22. 27. The control device, comprising:
The device according to any one of claims 18, 19, 21, 22, and 26, wherein the predetermined device is configured to perform a break-in operation during the operation start-up preparation time. Operation control device. 28. A plurality of work patterns are stored in the operation plan storage means, and the control means determines a non-production start time by selecting a desired work pattern from the plurality of work patterns. 17. The method according to claim 17,
An operation control device for a device according to any one of 9, 20, 22, 23, 24, and 25. 29. A plurality of work patterns are stored in the operation plan storage means, and the control means selects a desired work pattern from the plurality of work patterns to thereby determine the length of non-production time or the start of production. The operation control device for a device according to any one of claims 18, 19, 21, 22, 26, and 27, wherein a time is grasped. 30. A plurality of work patterns are stored in the operation plan storage means, and the control means selects a non-production start time and a non-production start time by selecting a desired work pattern from the plurality of work patterns. 23. The device operation control device according to claim 19, wherein the device detects the length of time or the production start time. 31. The device operation control device according to claim 28, wherein the work pattern stored in the operation plan storage means can be changed to an arbitrary pattern. 32. The control means, wherein, within the production time, among the devices, there is a device for which it is determined that the workpiece is not carried in for a time longer than the total time of the operation stop delay time and the operation start preparation time. 31. The device operation control device according to claim 19, wherein the operation of the device is stopped with the operation stop delay time.