JP3351209B2 - Work management device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work management device for causing a plurality of production machines to work in cooperation, and more particularly to a work management device for automatically setting a work speed and the like so that a production plan can be observed. About.

[0002]

2. Description of the Related Art Conventionally, with the aim of improving work efficiency,
2. Description of the Related Art A production line is being operated in which a plurality of production machines simultaneously perform different operations on one work.

[0003] The control of this production line is performed by a production management device.

When the production management device inputs a production plan, the type of vehicle and the number of vehicles to be manufactured on that day are calculated, and the line speed and the like are set based on the calculation result. Therefore, as long as an accident such as a failure in the production line does not occur, production according to the production plan is possible.

[0005]

However, recently, for example, an intelligent robot equipped with a force sensor has been arranged on this production line, and such an intelligent robot can smoothly perform a given task. If not performed, the same operation is repeated, so that one operation can be performed reliably, and the production plan can be easily observed in terms of fewer stoppages of the production line. On the contrary, when the number of repetitive operations increases, a new problem arises in that the production speed gradually becomes slow and it becomes difficult to comply with the production plan.

Of course, if a human constantly monitors the production plan and production results and changes the line speed, this problem may be solved to some extent, but it is actually difficult to always monitor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a production management apparatus for automatically setting a work speed and the like so as to comply with a production plan.

[0008]

According to the first aspect of the present invention,
A plurality of production machines (20, 25A, 25B, 15A, 15
(F) a work management device (60) for performing a work in cooperation with the required tact time calculation means (62) for calculating a required tact time required for each work type based on a production plan; Production machines (20, 25A, 25
(B, 15A, 15F) based on work conditions set in advance, a reference tact time calculating means (6) for calculating a reference tact time as a reference for work management for each work type.
4) and if the reference tact time calculated by the reference tact time calculation means (64) is longer than the required tact time calculated by the required tact time calculation means (62), the plurality of production machines ( 20, 25A,
25B, 15A, 15F)
The reference tact time falls within the required tact time
Work speed changing means to change within a preset range
(65A) and the working speed changing means (65A).
The plurality of production machines (20, 25A, 25B, 15
A, 15F) to increase the working speed of each
The reference takt time is still required by the required takt time.
If it is not possible to fit in the
Machines (20, 25A, 25B, 15A, 15F)
Change the work to be assigned to
To approach or fall within the required takt time
And a work allocation changing means (65B) for performing the above operation.

For example, based on a production plan, it is necessary to produce 200 vehicles per day for car A, so that 2 minutes /
The time required for production, that is, the required tact time, is calculated. For example, the required production time is 3 minutes per vehicle. Based on the preset work conditions such as the work speed required for assembling each part and the work assignment of which robot to perform, under these work conditions, the car A is produced at a rate of 2.5 minutes / vehicle. Then, the time required for the production, that is, the reference tact time, is determined so that the car B can be produced at a rate of 2.7 minutes / vehicle.

In the above example, although it is necessary to produce the A-vehicle at 2 minutes / vehicle, under the preset working conditions, 2.5
Because the car can be produced only at the rate of min / vehicle, the standard tact time is
Within the required tact time, and work speed
If only the degree is insufficient, change the work assignment and
Time within the required takt time.

As described above, by changing the working conditions, it becomes possible to carry out production in compliance with the production plan. Also production
Meet the demands even if the plan fluctuates greatly
become able to.

According to the second aspect of the present invention, a plurality of
For production machines (20, 25A, 25B, 15A, 15F)
A work management device (60) for performing work jointly.
Required for each work type based on the production plan
Request tact time calculation means (6) for calculating tact time
2) and the plurality of production machines (20, 25A, 25B,
15A, 15F) based on the work conditions set in advance.
And set a standard tact time as a standard for work management.
Reference tact time calculation means (64) for each species
And the reference tact time calculation means (64)
The calculated reference tact time is calculated by the required tact time.
Longer than the required takt time calculated by step (62)
In this case, the plurality of production machines (20, 25A, 25
B, 15A, 15F)
The reference takt time is smaller than the required takt time
Work assignment changing means (65B) for changing so that it becomes easier
And the work allocation changing means (65B)
Even if the tact time is the shortest, the reference tact time
Is not smaller than the required tact time
Are the plurality of production machines (20, 25A, 25B, 15
A, 15F) are changed within a desired range.
In addition, the reference takt time becomes the required takt time.
Change the working speed to get closer or shorter.
A work management device comprising a further means (65A) .

As described above, the work assignment is prioritized so that the reference takt time falls within the required takt time. Further, if the work assignment alone is insufficient, the work speed is changed to change the reference takt time to the required takt time. If it falls within the range, even if the production plan fluctuates greatly, it becomes possible to respond to the demand.

According to the third aspect of the present invention, there is further provided:
The plurality of production machines (20, 25A, 25B, 15A,
15F) The actual work time for each work element of the work performed
Actual work time storage means (68) for storing the work type
Is stored in the actual work time storage means (68).
From the actual working hours of the production machines (20, 25)
A, 25B, 15A, 15F) for each work element
Tact time for each element is calculated for each work type by statistical processing
Statistical processing means (69), and for each input work type
Total work that can be performed from the reference tact time to the remaining work
Total tact time calculation means (6) for calculating tact time
6) and calculated by the statistical processing means (69).
From the tact time for each work element for each work type,
Total work tact to calculate total work tact time related to the industry
Time calculation means (67) and the total work tact time calculation
The total work tact time calculated by the delivery means (67) is
Calculated by the total tact time calculation means (66)
If it is longer than the total takt time,
Subsequent work so that the time is shorter than the total takt time
Business, the production machines (20, 25A, 25
B, 15A, 15F)
Work conditions to change from existing work conditions to new work conditions
A work management device comprising a change unit (65) .

In a robot having a force sensor, even if the same operation is performed, the same operation does not always end in the same time. And the total work tact time that would be required in the work. Since the total work tact time may vary greatly depending on the situation of motion correction in the work to be performed, it is necessary to obtain a numerical value that is as accurate as possible.

For this reason, the actual work time of each work element performed in the past is accumulated in the work type, and the accumulated work time is statistically processed, so that a more accurate total work tact time can be obtained. .

In this way, even if the work is delayed due to a correction operation or the like, the work can be completed more reliably within the reference tact time.
As a result, production can be performed in compliance with the production plan.

In the invention described in claim 4, the work
The business condition changing means includes the plurality of production machines (20, 25).
A, 25B, 15A, 15F)
The total work tact time is within the total tact time.
Work speed change within a preset range to fit
Changing means (65A) and the working speed changing means (65A)
The plurality of production machines (20, 25A, 25B,
15A, 15F) each work speed to the maximum
Even if it rises, the total work takt time still
If it is not possible to fit in the
Change the work assigned to each production machine to
As the work tact time approaches the total tact time,
Or work assignment changing means (65B) to make it fit
And a work management device comprising:

As described above, the total work time is given priority to the work speed .
Work time within the total takt time, and if the work speed alone is not enough, change the work assignment so that the total work takt time approaches the total takt time.
To, or if so fit, it is possible to meet the requirements even when the production plan is varied greatly.

According to the fifth aspect of the present invention , the work
The condition changing means includes a plurality of the production machines (20, 25A,
25B, 15A, 15F)
The total work tact time is greater than the total tact time
Allocation change means (65) for changing the
B) and said work assignment changing means (65B)
Even if the total work tact time is minimized,
If the total time cannot be less than the total takt time
In this case, the plurality of production machines (20, 25A, 25B,
15A, 15F) within the desired range
To change the total work tact time to the total tact time.
Working speed to approach or shorten
A work management device comprising a degree changing means (65A) .

In this way, the total work
The work time within the total takt time, and if the work assignment alone is not enough, change the work speed so that the total work takt time approaches the total takt time.
To, or if so fit, it is possible to meet the requirements even when the production plan is varied greatly.

[0022]

Embodiments of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows an example of a production line to which the work management device of the present invention is applied.

As shown, the production line includes a traveling track 10 provided around a work stage 5.
Automatic transfer vehicles (hereinafter, referred to as AGVs) 15A to 15F for transferring parts as works on A, 10B, and 10C, a double-arm robot 20 provided on the work stage 5, and multi-axis robots 25A and 25B. It is composed of

The AGVs 15A to 15D are provided merely for carrying parts,
E and 15F operate not only to convey the parts but also to move the placed parts up and down or slide left and right as needed to assist the robots 20, 25A and 25B in their operations. . The operations of the AGVs 15A to 15F and the robots 20, 25A, 25B are comprehensively controlled by the integrated controller 30. The integrated controller 30 includes a work management device 60 described later.
Are connected, and production management is performed according to a command from the work management device 60. The plurality of production machines in the claims are the double-arm robot 20 and the multi-axis robots 25A and 25A.
B and AGV15E, 15F.

The two-armed robot 20 has a CR control panel 35
And the multi-axis robots 25A and 25B are AR
Each is individually controlled by the control panel 40.

The double-armed robot 20 is a cooperative robot that works in cooperation with the AGVs 15E and 15F running on the running track 10C, and has a function of automatically changing work tools according to the contents of the work. ing. In addition, since a visual sensor and a force sensor are provided, it is possible to perform repetitive operations under the control of the visual controller 17 and the force controller 19 for assembling soft parts that are elastically deformed when a certain amount of force is applied. Therefore, it can be easily performed. AGV
15E and 15F are cooperative AGVs that operate in cooperation with the cooperative two-armed robot 20.

FIG. 2 is a block diagram showing a schematic configuration of the work management device 60.

The host computer 70 shown in the figure is a computer for calculating a production plan relating to the type of vehicle, specification, and number of vehicles to be produced today based on the order status sent from a sales company or the like.
The production plan calculated by 0 is input into the work management device 60 via the production plan input unit 61.

The required tact time calculation unit 62 calculates the required tact time from the production plan input through the production plan input unit 61, which specification of which model should be produced in what time per car, and the production line of the day. And calculates the required tact time calculation means.

The work condition storage unit 63 stores the two-armed robot 2 having the force sensor 18 under the work condition as a reference.
0, multi-axis robots 25A, 25B, AGV15E,
When the vehicle is manufactured using the 15F, a reference tact time indicating which specification of which model can be produced in what time is stored based on past production history and the like.
In addition, the double-arm robot 20, the multi-axis robot 25A, 2
The working speed of each of the 5B and the AGVs 15E and 15F is also stored in three stages as overrides. Further, the double-arm robot 20 and the multi-axis robots 25A and 25A
B, work elements that can be assigned to each of the AGVs 15E and 15F, and work tact times required when the work elements are assigned are also stored for each production machine and each vehicle type. Further, for example, when the bolting is performed on the vehicle type A by the double-armed robot 20 by the statistical processing of the statistical processing unit 69 described later, the time required is 2
0 seconds or the same work is performed by a multi-axis robot 25
A and 25B also store work element-specific tact times for each work element, such as 15 seconds.

Further, since the work management device 60 of the present invention can also perform production management of a production machine provided with the force sensor 18 and the visual sensor, as shown in FIGS. Also, a work tact time that would be required if the work was performed without performing a correction operation such as a correction operation, and an allowable time when the correction operation was performed are stored.

Based on the reference tact time for each vehicle type and specification stored in the work condition storage unit 63, the reference tact time calculation unit 64 calculates a reference tact time as a work management reference for each work type, that is, for each vehicle type. And functions as a reference tact time calculation means for calculating for each specification.

The work condition changing unit 65 compares the reference tact time calculated by the reference tact time calculation unit 64 with the required tact time calculated by the required tact time calculation unit 62, and determines that the reference tact time is the required tact time. If the length is longer than that, production according to today's production plan cannot be performed. Therefore, to comply with the production plan, the speed of the production line is increased or the double-arm robot 20 or the multi-axis type is used. Robot 25A, 25B, AGV
The reference condition is assigned to each of 15E and 15F, and the reference condition is rearranged, and functions as a work condition changing unit.

When the reference tact time is longer than the required tact time, the work speed changing unit 65A controls the double-arm robot 20, the multi-axis robots 25A and 25B, and the AGV 15
The work speeds of E and 15F are stored in the work condition storage unit 63.
To be changed within a preset range,
It functions as a work speed changing means.

When the reference tact time is longer than the required tact time, the work assignment changing unit 65B controls the double-arm robot 20, the multi-axis robots 25A and 25B, and the AGV 15
The work assigned to each of E and 15F is changed based on the work assignment data stored in the work condition storage unit 63, and functions as a work assignment change unit.

In order to keep the reference tact time within the required tact time, it is only necessary to increase the working speed of each of the two-armed robot 20, the multi-axis robots 25A and 25B, and the AGVs 15E and 15F. The work assignment may be changed. Further, the increase of the work speed and the change of the work assignment may be used together. The total tact time calculation unit 66 calculates the total tact time that can be applied to the remaining work from the progress of the work input from the integrated controller 30 and the required tact time of the vehicle type currently being manufactured. It functions as time calculation means.

The total work tact time calculation unit 67 calculates the work progress status input through the total tact time calculation unit 66, the work tact time for each vehicle type and each work element stored in the work condition storage unit 63, and will be described later. It calculates the total work tact time that would take the remaining work of the vehicle type currently being produced from the work element tact time, and functions as a total work tact time calculation means.

The work condition changing unit 65 also compares the total work tact time calculated by the total work tact time calculation unit 67 with the total tact time calculated by the total tact time calculation unit 66 to determine the total work tact time. If is longer than the total takt time, the vehicle currently being produced cannot be produced within the required takt time calculated from the production plan. , Increase the speed of the production line, or use the double-arm robot 20, multi-axis robots 25A, 25B, AG
The reference work condition assigned to each of V15E and 15F is rearranged.

The actual work time stored in the actual work time storage section 68 is inputted for each type of vehicle, each production machine, and each work element, and is stored. And functions as an actual work time storage unit.

The statistical processing unit 69 stores the actual work time storage unit 6
8, the time required for the actual work is statistically processed for each vehicle type, each production machine, and each work element, and the processing result is stored in the work condition storage unit 63 as the tact time for each work element. It functions as a statistical processing means.

The work management apparatus of the present invention configured as described above operates as follows based on the flowcharts shown in FIG.

First, when the production plan input unit 61 inputs a production plan from the host computer 70, the required tact time calculation unit 62 calculates the required tact time for each vehicle type and specification in consideration of the factory operation time and the like. .

For example, based on the production plan, it is necessary to produce 200 vehicles per day for car A, so that 2 minutes /
The time required for the production, that is, the required tact time, is obtained (S1, S2) such that the production of 100 vehicles or B vehicles must be produced at a rate of 3 minutes / vehicles per day because 100 vehicles need to be produced per day. .

The reference tact time calculation section 64 calculates a reference tact time for each vehicle type and each specification stored in the work condition storage section 63. For example, from the preset work conditions such as the work speed required for assembling each part and the work assignment of which robot is to be performed, under the work conditions, a ratio of 2.5 minutes / vehicle is used for the vehicle A. The time required for the production, that is, the reference tact time, is determined so that the vehicle B can be produced at a rate of 2.7 minutes / vehicle. (S3).

The work condition changing section 65 compares the required tact time calculated in the above steps with the reference tact time, and if the reference tact time is longer than the required tact time, it follows the production plan of today. As shown in FIG. 9, the work speed changing unit 65A increases the override set in three stages, that is, increases the speed of each work element by one stage, and calculates the reference tact time as shown in FIG. The unit 62 calculates the reference tact time again with the override raised by one step. As a result, if the required tact time has not yet become shorter, the override is further increased by one step. The process of raising the override in this manner is performed until the reference tact time becomes shorter than the required tact time, or until the prepared override becomes the maximum. In the present embodiment, since this override has three stages as shown in FIG. 9, the setting is changed until the speed becomes the fastest in the third stage. In addition, this override is not set uniformly based on the work for each vehicle type, but is set finely for each work element as shown in FIG. 8. Is
As described above, the operation is performed in consideration of all work elements (S4 to S4).
S7).

On the other hand, when the reference tact time is first calculated, if the time is shorter than the required tact time, the production can be performed in accordance with the production plan. Therefore, the reference override and work assignment are set to each production machine as work conditions. Then, the production is performed under the working conditions (S8, S9).

As described above, when the production plan cannot be complied with even if the override is changed, a work assignment preset for each production machine, for example, a work to determine which manipulator performs which work. Is changed so that the production speed can be increased. This change of the work assignment is performed by the work assignment change unit 65B. The reference tact time calculation unit 64 calculates the reference tact time again based on the changed work assignment. As a result, if it is still longer than the required takt time, the work is changed to another work assignment. The process of changing the work assignment is performed until the reference tact time becomes shorter than the required tact time or until there is no changeable work assignment (S10 to S1).
2).

If the override is raised to the maximum and the work assignment with the shortest work time still does not become shorter than the required takt time, the override and the work assignment with the minimum reference tact time are set (S13). .

When the reference tact time is shorter than the required tact time by changing the override or the work assignment, the override and the work assignment at that time are set as work conditions in each production machine. The production is performed under the working conditions (S8).

The above processing is performed for each vehicle type or specification, and when the processing is performed for all the vehicle types targeted for the production plan, the production at the factory is started (S9).

The above process is a process for determining the production speed for each vehicle type and the work conditions such as which work each production machine is responsible for before the factory is operated so that the production plan can be observed.

However, even if the production plan can be adhered to in this way, a situation may occur in which the production plan cannot be adhered to during operation of the factory. In the flowchart shown in FIG. Processing is performed so that production can be performed according to the production plan.

The flowchart shown in FIG. 4 is a process performed for each work machine.

First, the work conditions determined by the processing of the flowchart of FIG. 3 are input, and when production is started under these work conditions, a count for measuring the time required for each work element of each production machine is started. (S2
1).

When there is a manipulator that has completed a certain work element, the time required for the work of the work element is added to the reference tact set for the work element and the allowable value of the repetitive work by sensor correction. It is determined whether it is within the time.

For example, in FIG. 9, when the work of holding a duct is performed by a manipulator of a certain working machine,
The reference tact is 5 seconds, and the maximum value of the permissible time of the operation of re-gripping the duct by sensor correction is 5 seconds.
Since this is seconds, it is determined whether or not this operation has been performed within a maximum of 10 seconds. This determination is made each time the manipulator of any of the work machines completes the predetermined work (S22 to S24).

If the work is not completed within the work time in consideration of the allowable value, the production plan of the day may not be maintained under the initially set work conditions. The calculation unit 67 calculates how much time is required for the work machine to perform the remaining work, that is, how long the total tact time is.

The work condition storage unit 63 stores, for each vehicle type, a work tact time indicating how much work is required when performing a work using which manipulator. Then, the total work tact time is calculated based on the work tact time.

On the other hand, the total tact time calculation unit 66 inputs a required tact time that can be used for the production of the vehicle type, and how much work time can be spent in the post-process in order to comply with the required tact time. To calculate the total tact time.

The work condition changing unit 65 compares the total work tact time with the total tact time. If the total work tact time is longer than the total tact time, the required tact time given to the production of the vehicle type is determined. Since it is difficult to perform production within the work, the override set in three stages by the work speed change unit 65A, that is, the speed of each work element is increased by one stage, and the total work tact time calculation unit 67 , With this one-step override,
Calculate the total work tact time. As a result, if it is not shorter than the total takt time, the override is further increased by one step. The process of increasing the override in this manner is performed until the total work tact time becomes shorter than the total tact time or until the prepared override becomes the maximum. In the present embodiment, since this override has three stages as shown in FIG. 9, the setting is changed until the fastest speed of the third stage is reached (S
25-S27).

As described above, if the required tact time cannot be complied with even if the override is changed, the work allocation in the post-process of each production machine is changed so that the production speed can be increased. This change of the work assignment is performed by the work assignment change unit 65B. The total work tact time calculation section 67 calculates the total work tact time again based on the changed work assignment. As a result, if it is still longer than the total takt time, it is changed to another work assignment. The process of changing the work assignment in this manner is performed until the total work tact time becomes shorter than the total tact time or until there is no changeable work assignment (S28 to S30).

If the override is raised to the maximum and the work assignment with the shortest work time still does not become shorter than the required takt time, the override and the work assignment with the smallest total work tact time are set (S31). ).

When the total work tact time becomes shorter than the total tact time by changing the override or the work assignment, the override and the work assignment at that time are set as work conditions in each production machine. For the subsequent work, production is performed under the work conditions (S32).

As described above, if the work of a work element cannot be completed within a predetermined time, it is predicted that the required tact time will not be kept under the set work conditions. Below, the speed is changed or the work assignment is changed so as to shorten the time required in the post-process, so that the required tact time is kept within the required tact time.

FIG. 5 is a flowchart showing the process of changing the work assignment of FIG.

When it is necessary to change the work assignment, the remaining work elements to be performed by the work machine for the vehicle type are extracted (S40), and the extracted work elements can be executed. Among the manipulators, a manipulator capable of exchanging work elements and which can be executed in the shortest time is assigned to the work (S
41), the work elements of the manipulator are replaced (S42).

In this way, a manipulator capable of exchanging work elements is searched for so that the required tact time can be kept.

The flowchart shown in FIG. 6 shows a process for rewriting the work tact.

The work tact time, which is the time required for one work element, is stored in the work condition storage section 63. However, if this work tact time is given as a fixed value, it takes one vehicle to produce. Since it is sometimes difficult to accurately grasp the reference tact time, the work tact time is updated sequentially from the time actually required for production so that the reference tact time can be made more accurate. It is.

First, the statistical processing section 69 calculates the actual time taken to complete one work element and the time required for the sensor correction work if the work was performed by sensor correction, for all work elements. (S50), and this is stored in the actual work time storage unit 68. When the number of data becomes N for each work element,
The data of the work element is extracted and statistically processed.
Is drawn, and a reference value and an allowable value of the distribution are obtained (S51, S52).

Since the determined reference value is an average value that would be required for executing the work element, the statistical processing unit 69 sets the reference value as a new work tact time of the work element and It is rewritten from the work tact time of the work element stored in the condition storage unit 63.

Similarly, the allowable value is rewritten to the obtained allowable value. Therefore, the reference value and the permissible value for each work element in FIG. 9 are rewritten based on the latest information obtained in the actual work.

As described above, before the factory is started, the production speed for each type of vehicle and the work conditions such as which work each production machine is responsible for are determined so that the production plan can be observed. Always monitor whether the work is completed within the required takt time, and if there is a danger that it will not be completed, change the work speed etc. so that it can be completed,
Based on the data collected in actual work, it is possible to know how much time is required for each vehicle, etc., so that production lines can be operated so that production plans can be complied with. it can.

[0075]

According to the first aspect of the present invention, a plurality of production machines are provided.
The reference takt time determines the working speed of each machine.
Within the preset range to fit within the project time
To maximize the working speed of each of multiple production machines
Even if it rises, the reference tact time still exceeds the required tact
If you cannot fit within the time,
Change the work assigned to each production machine to
So that the quasi-tact time approaches the required tact time
Production plan
Be able to respond to the demand even if it fluctuates
Become.

According to the second aspect of the present invention, priority is given to work assignment.
And the standard takt time falls within the required takt time
And if work assignment alone is not enough,
Change the speed and the reference takt time is within the required takt time
If the production plan fluctuates greatly because
But you will be able to meet that demand.

According to the third aspect of the present invention, a plurality of production machines
From the actual work time for each work element
Tact time for each work element of each production machine
The work type is determined by statistical processing,
From the takt time for each work element to the remaining work
The total work tact time is calculated and this total work tact time
Is longer than the total takt time,
So that the total time is shorter than the total takt time,
For the work, the work conditions of each of the plurality of production machines
Change the work condition from the set work condition to a new work condition
In each work element performed in the past.
Accumulation work time is accumulated for each work type, and this is statistically processed.
For a more accurate total work tact time
Work can be delayed due to correction operations, etc.
Even more reliably within the standard takt time.
Can be completed, resulting in production planning
Production can be performed.

According to the fourth aspect of the present invention, a plurality of production machines
The total work tact time is the total
Within the preset range to fit within the required time
To maximize the working speed of each of multiple production machines
Even if it rises, the total work tact time still
If you cannot fit within the time,
Change the work assigned to each production machine to
Work tact time approaches the total tact time
Production plan
Be able to respond to the demand even if it fluctuates
Become.

According to the fifth aspect of the invention, priority is given to work assignment.
And the total work tact time falls within the total tact time
And if work assignment alone is not enough,
Change the speed so that the total work takt time is within the total takt time
If the production plan fluctuates greatly because
But you will be able to meet that demand.

[Brief description of the drawings]

FIG. 1 is a diagram showing a production line to which a work management device of the present invention is applied.

FIG. 2 is a block diagram of a work management device of the present invention.

FIG. 3 is an operation flowchart of the production management device of the present invention.

FIG. 4 is an operation flowchart of the production management device of the present invention.

FIG. 5 is an operation flowchart of the production management device of the present invention.

FIG. 6 is an operation flowchart of the production management device of the present invention.

FIG. 7 is an explanatory diagram when performing statistical processing.

FIG. 8 is a diagram illustrating an example of a tact time stored in a work condition storage unit.

FIG. 9 is a diagram illustrating an example of a tact time stored in a work condition storage unit.

[Explanation of symbols]

5 work stage, 15A to 15D AGV, 18 force sensor, 20 double-arm robot, 25A, 25B multi-axis robot, 30 integrated controller, 65 work condition change unit.

Continuation of the front page (58) Field surveyed (Int.Cl. ⁷ , DB name) G05B 19/418 G06F 17/60

Claims (5)

(57) [Claims] A plurality of production machines (20, 25A, 25
B, 15A, 15F) for performing work in cooperation with each other, and a required tact time calculating means (62) for calculating a required tact time required for each work type based on a production plan.
And the plurality of production machines (20, 25A, 25B, 15A,
15F), a reference tact time calculating means (64) for calculating a reference tact time as a reference for work management for each work type based on a work condition set in advance, and a reference tact time calculating means (64). If the calculated reference tact time is longer than the required tact time calculated by the required tact time calculating means (62), the plurality of production machines (20, 25A, 25)
B, 15A and 15F),
Ensure that the quasi-tact time falls within the required tact time
Work speed changing means (6) for changing the work speed within a preset range.
5A) and the work speed changing means (65A).
Industrial machinery (20, 25A, 25B, 15A, 15F)
Even if each work speed is increased to the maximum,
It is possible to keep the takt time within the required takt time.
If not, the plurality of production machines (20, 25)
A, 25B, 15A, 15F)
Change the work and make the reference tact time equal to the required tact
Work to get closer to or fit in time
A work management device comprising: an assignment change unit (65B) . 2. A plurality of production machines (20, 25A, 25
B, 15A, 15F) to work jointly
A management apparatus (60), the request Tak required for each work type based on the production plan
Request tact time calculating means (62) for calculating the required time
And the plurality of production machines (20, 25A, 25B, 15A,
15F) based on the work conditions set in advance.
Standard tact time, which is the standard for business management, for each work type
The calculated reference tact time calculating means (64) and the calculated reference tact time calculating means (64)
The required tact time is calculated by the required tact time
It is longer than the required tact time calculated by (62)
In this case, the plurality of production machines (20, 25A, 25
B, 15A, 15F)
The reference takt time is smaller than the required takt time
Work assignment changing means (65B) for changing so that it becomes easier
And the reference assignment by the work assignment changing means (65B).
The reference tact time before
If the required tact time cannot be reduced,
The plurality of production machines (20, 25A, 25B, 15A, 1
5F) Change the working speed within the desired range
The reference tact time approaches the required tact time
Work speed changing means to shorten or shorten
(65A) . Wherein further, said plurality of production machines (20,25A, 25B, 15A,
15F) The actual work time for each work element of the work performed
Actual work time storage means (68) for storing the work type
The actual work time stored in the actual work time storage means (68).
From the operation time, the production machines (20, 25A, 2
5B, 15A, 15F) for each work element
The tact time is calculated by statistical processing for the work type.
Total processing means (69) and remaining work from the input standard tact time for each type of work
Total tact to calculate total tact time that can be applied to
Time calculation means (66) and the statistical processing means (6
9) Each work element for each type of work obtained according to 9)
Total work tact time from tact time to remaining work
Calculated by the total work tact time calculating means (67) and the total work tact time calculating means (67).
The total work tact time calculated is the total tact time calculation means.
If it is longer than the total takt time calculated by (66)
In this case, the total work tact time is
In order to shorten the time, the following work
Machine (20, 25A, 25B, 15A, 15F)
Each work condition is set based on the set work condition.
Work condition changing means (65) for changing to work conditions.
The work management device according to claim 1 or 2, wherein: 4. The work condition changing means, wherein the plurality of production machines (20, 25A, 25B, 15A,
15F), the total working speed
Time is set in advance so that it falls within the total takt time.
Working speed changing means (65A) for changing within the range, and the plurality of
Industrial machinery (20, 25A, 25B, 15A, 15F)
Even if the work speed is increased to the maximum,
Industry takt time can be within the total takt time.
If it is not possible, assign to each of the production machines
The total work tact time
To approach or fit in the total takt time
And a work assignment changing means (65B) for performing
The work management device according to claim 3, wherein 5. The work condition changing means, wherein the plurality of production machines (20, 25A, 25B, 15A,
15F) is assigned to the total work
Tact time is smaller than the total tact time
(65B), and the total work time is changed by the work assignment changing means (65B) .
The total work tact time
Is not smaller than the total takt time,
The plurality of production machines (20, 25A, 25B, 15A,
15F) change the working speed within the desired range.
The total work tact time approaches the total tact time
Work speed change hand to make it shorter or shorter
4. The method according to claim 3, further comprising a step (65A).
Work management device.