JP3368585B2 - Line production support system and line production planning method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a line production support system and a line production method in a factory for continuously producing a large number of products of a plurality of types such as industrial machines and household electric appliances.

[0002]

2. Description of the Related Art A new work (at a predetermined time interval) by a transfer device (a work or an assembly device, or a work or assembly target by a worker or the like, which is a part or final assembly). A production method in which a large number of work elements (meaning individual steps of processing or assembling process) are sent to the sent work by a plurality of work equipment provided in parallel in the conveying direction is called a line production method. .

This system is characterized in that, when a large number of works of the same model are continuously produced, the efficiency (operating rate) of the work equipment and the workability of the worker can be kept extremely high.

However, when a plurality of models of work having short tact times (for example, about 20 seconds) are produced by the line production system, the work elements (work contents) and work element time of the work of each model are Due to differences, it is necessary to change work equipment, set up work, change jigs, change transport time intervals, etc. when switching models, making it difficult to maintain high equipment availability and workability. Becomes

As a conventional technique for solving such a problem in line production of a plurality of types of work products, a method of producing work products of all models by one line (single line), As described in JP-A-55-106756, a plurality of partial lines configured from equipment for exclusively providing work elements only for work of the same model are provided side by side, and the plurality of side lines are connected in series. There is a method of connecting and producing. In either method, a large number of work items of the same model are continuously produced.

In the method of producing a plurality of models of work products on a single line, the work element time differs depending on the model,
It is necessary to complicatedly change the work transfer time in each part of the line every time the model is switched. However, there is a problem that the work efficiency of the entire line is significantly reduced because the stagnation area and the empty area of the work are generated on the line due to the change of the transportation time interval in each part of the single line due to the switching of the model. is there.

Further, in a system in which a plurality of adjacent lines having different transfer time intervals are connected in series so as to prevent the work from becoming stagnant or a vacant area, at least two main supply transfer devices for supplying and transferring the work are provided. Since they are installed in parallel, a large number of tributary transport devices are installed in parallel and connected between the main supply transport devices, and a means for varying the transport speed of the work for each tributary transport device is provided, There is a feature that the operating rate of workers and work equipment is extremely high, but when the production volume varies by model, it is necessary to change the configuration of line equipment such as the number of tributary transfer devices and the speed of transfer devices. However, there is a drawback that the management of the transport device is complicated.

[0008]

SUMMARY OF THE INVENTION In the above-mentioned conventional method, the work equipment is changed, the setup work is carried out, the transfer time interval is changed, due to the change of model when a plurality of models are produced by a single line.
It is difficult to solve the problem of fluctuations in the total value of work element times (workload amount) in each work facility.

An object of the present invention is that a plurality of types of work pieces are sent by a transfer device, and a plurality of work elements are installed in a row along the transfer direction of the transfer device by a plurality of work equipments. It is an object of the present invention to provide a line production support system capable of producing a plurality of types of work products in a given time in a production line for performing the work.

[0010]

In order to achieve the above-mentioned object, in the line production support system of the present invention, a plurality of types of work items are conveyed by the conveying device and installed along the conveying direction of the conveying device. A line production support system for supporting the operation of a production line in which a series of work elements are applied to a work by a plurality of work facilities, and an input for receiving one or more information regarding a classification index for classifying the work Means and at least one of these pieces of information as a classification index, a classification means for classifying the plurality of types of work products into groups, and the work products of each group, the total number of products produced by each group And a deciding means for deciding the production sequence of each model in each production unit described above, and arranging means for arranging according to And is obtained by the fact that an output means for outputting a production sequence.

[0011] Further, an integrating means for obtaining a total sum for each work facility of a time (work element time) required to perform a work element in a production unit obtained by the knitting means, and a total sum for each work facility are averaged, The distribution means distributes to a plurality of work equipment, and the determination means decides the production sequence in consideration of the distribution to the work equipment.

[0012]

The input means receives one or more pieces of information regarding the classification index for classifying the work.

The above-mentioned classification means includes information concerning work elements (work element types,
Work element time total value, etc.), information about work equipment (type of work equipment of particular work equipment, type of particular tool of jigs and tools used as auxiliary equipment of work equipment, etc.)
At least one of the above is used as a classification index to classify into a number of groups smaller than the number of types of the work. As a result, the work belonging to each group is the total value of the types of work elements to be applied or the work element time, that is, the work time required to produce one work piece, the work equipment to be used, or the work equipment to be used. The jigs and tools used as auxiliary equipment will be similar. Therefore, when the works belonging to each group are produced in a single line, even if the works of different models are continuously input, the change in work contents due to the switching of the models becomes extremely small.

The knitting means mixes the works of each group thus classified according to the total number of the works produced in each group, and forms a plurality of production units (mixed lots) of a fixed number. Organize. As a result, since the work equipment, jigs and tools, the types of work elements, and the work element time in each work equipment for each mixed lot become equal, even if the mixed lots organized in this way are continuously produced. It eliminates the need for work equipment setup work and jigs and tool replacements, and multiple types of work items are repeatedly produced at a frequency according to the production ratio, thereby producing multiple types of work items in a certain period of time. be able to.

The deciding means decides the production order of the organized production units.

Further, the integrating means obtains the total sum of the time (work element time) required to perform the work elements in the production unit obtained by the knitting means (work element time) for each work facility.

The distribution means averages the total sum of the work equipments and distributes the work equipments to the plurality of work equipments. Therefore, the sum of work contents and work element times for each production unit in each work equipment is kept constant, In addition, the workability of each work facility can be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a line production support system according to the present invention will be described with reference to FIGS. 1, 2, 3 , 8 , 9, 10.

In FIG . 9 , P is a work scheduled to be produced, and these are three groups (these are referred to as model A, model B, and model C) by the grouping method described below. Will be classified). It is assumed that the production of a total of 36 products including 18 models A, 12 models B, and 6 models C is planned.

The configuration of the line production support system will be described.

As shown in FIG. 1, this system includes an input means 2, a classification means 6, a knitting means 7, and an accumulating means 15.
It has a distribution means 8, a determination means 9, and an output means 10.

The deciding means 9 has a computing means 16 and an order deciding means 17.

FIG. 10 shows the internal structure of the hardware that realizes this system.

The present system has a keyboard 2 as an input means 2, a display device 4 as an output means 10, and a printer 3, and further has an external storage device 5 and a main body 1.
The main body 1 has a central processing unit (CPU) 11, a main memory 12 that stores programs and data, and interfaces 13 and 14. CPU 11, main memory 12,
The interfaces 13 and 14 are the classification means 6 shown in FIG.
The functions of the knitting means 7, the accumulating means 15, the distributing means 8, the determining means 9, the calculating means 16 and the order determining means 17 are executed.

The line production support system operates in the flow shown in FIG.

In step ST20, the input means receives information about work elements and work equipment. Step ST21
Then, the classification means classifies into groups. Step ST2
In 2, the knitting means knits into production units. Step ST
At 23, the integrating means obtains the sum of the work element times for each work facility. In step ST24, the distribution means distributes the work equipment. In step ST25, the determining means determines the production order. In step ST26, the output means outputs the production order.

Next, a method of grouping the work P scheduled to be produced will be described with reference to FIGS. In FIG. 2, A1, B1, ..., J1 are work models, e1, e2, ..., E20 are work elements, and j1, j.
2, ..., J20 are jigs and tools used when applying each work element. The circle mark at the intersection of the row representing each model of the work and the column representing the work element means that the work is given the work element.

First, a first example of the method of dividing the 10 types of models in step ST21 into several groups each composed of a group of similar models will be described in detail with reference to FIG.

FIG. 3 is a flowchart of the process of exchanging rows and columns so that the meaning of the intersections in FIG. 2 is not changed. First, in FIG. 2, from the right column representing the working element name, 2 for each column row of e20 is ^0, the column of e19 is 2 ^1, Section ² 2, 2 ^3, ..., the weights so that 2 ¹⁹ Then, the weight is calculated only for each line marked with a circle, and the lines are rearranged from the top in the descending order of weight (step ST
1). It is checked whether or not there is a change in the position of each row after the rearrangement and the position of each row before the rearrangement (step ST2). If there is no change, the row and column swapping ends at this stage. When there is a change, the row before the rearrangement is updated to the row rearranged in the descending order of weight (step ST3). Against updated row, from below the line representing the model name, the line model J per row 2 ^0, type C
The rows are weighted as 2 ¹ , hereafter 2 ² , 2 ³ , ..., 2 ⁹ . For each column, the weight of only the circled portion is calculated, and the columns are rearranged from the left in descending order of weight (step ST4). It is checked whether or not there is a change in the position of each column after the rearrangement and the position of each column before the rearrangement (step ST5). If there is no change, the row and column swapping ends at this stage. If there is a change, the column before rearrangement is updated to the rearranged column from the left in descending order of weight (step ST6), and the process returns to the first step (step ST1). By exchanging rows and columns in this way, the circles at the intersections are gathered in a region surrounded by two sets of rows and columns as shown in FIG. From this result, if you divide it into groups, the model A of the work that performs work e1 to e7
1, D1, E1, and machine types B1, F1, G1, H1, I1, and e16 to e for performing the work of e8 to e15
It is divided into three groups, such as the models C1 and J1 of the work to be performed on 20 tasks. Therefore, the first group will be referred to as a model A, the second group will be referred to as a model B, and the third group will be referred to as a model C, depending on the result of grouping the work P scheduled to be produced .

Next, the above-mentioned grouped work P
A method for organizing a plurality of production units will be described. The total number of products produced in each group is 18 for model A in the first group, 12 for model B in the second group, and 6 for model C in the third group. Will be 3: 2: 1. The work P that is grouped by this ratio is organized into a production unit having a minimum number of units. In this case, since the ratio of the model C is 1/6, the production unit is a multiple of 6 or more, and here it is 6 units. Since the work P divided into groups is 36 in total, it is organized into 6 production units. The breakdown of the six workpieces T for each production unit is three for model A, two for model B, and one for model C.

The work P of the production unit organized in this way
A method of allocating the work element regarding to the worker, which is work equipment, will be described with reference to FIG. e1, e2, ..., e20
Is a work element name, and t1, t2, ..., T20 are times (work element time) required to perform each work element. For model A, e2 is a work element that cannot be performed unless e1 is completed, and e5 is a work element that cannot be performed unless e2 is completed. That is, the work elements related to the model A have the order of performing work in the order of e1, e2, e5, e6, and e7. For model B, e8, e9, e1
There is an order in which the work is performed in the order of 1, e12, and e13. With respect to the model C, e16, e17, e18, e19, and e20
There is an order in which work is performed in this order. When allocating the work elements of the models A, B, and C to the workers of each process, the sum of the time (work element time) required to perform all the work elements related to the work for each production unit for each process is Allocate so that they are averaged. In other words, by the integrating means, the work element time t1 related to the model A for each production unit in the first process,
Total of t2 and t5 and work element time t for model B
Then, t1 + t2 + t5 + t8 + t9, which is the sum of the total of 8 and t9 and the work element time 0 (zero) related to the model C, is calculated, and similarly in the second step and the third step, t6 + t7.
+ T11 + t12 + t13 + t16 + t17 + t18
And t19 + t20. Next, “IE, Vol. 13, No. 1” is used as the allocating means for allocating the work elements by the allocating means so that these three sums are averaged.
4, 1971. (P137 to P142) "Other model assembly line balancing""or the like.

In FIG . 9 , Q is a charging means for mixing at a ratio proportional to the total number of products produced in each group and forming a plurality of production units (mixed lots) of a fixed number.

S1 is a worker in the first process, and S2
Is a worker in the second step, and S3 is a worker in the third step. Further, the work area 1 has a range (work area) in which the work of the worker S1 can be performed, and the work area 2 is the work S
2 is a work area, and work area 3 is a work area of the worker S3. R is a transfer device that transfers a work to each worker in each work area. T is a work for each production unit. j1 is a jig / tool used by the worker S1 only for the model A, and j8 is a jig / tool used by the worker S1 only for the model B. j6 is a jig / tool used by the worker S2 only for the model A, j11 is a jig / tool used by the worker S2 for the model B only, and j16 is a jig / tool used by the worker S2 for the model C only. j19 is a jig / tool used by the worker S3 only for the model C.

Here, when the work T for each production unit is sent to the work area 1 of the worker S1 in the first step by the transfer device R at a constant time interval, the worker S1 makes the jig j1 of the model A. Using the tool j8 of the model B, the work elements e1 and e8 of the models A and B are applied. Other work elements e
For 2, e5 and e9, the jigs common to the models A and B are used, or the jigs are not used. In this way, the work elements e1, e2, e5, e assigned to the worker S1 by the time the work devices of the models A and B in the work area 1 are carried out of the work area 1 by the carrying device R.
8, e9 is performed.

Next, the work T for each production unit is sent to the work area 2 of the worker S2 in the second step by the transfer device R at regular time intervals. The worker S2 uses the jig A6 of the model A, the jig j11 of the model B, and the jig j16 of the model C to perform work elements e6, e11, e1 of the models A, B, C.
Apply 6. Other work elements e7, e12, e13, e
For 17 and e18, the jigs common to the models A, B and C are used, or the jigs are not used. In this way, in the work area 2, by the time the workpieces of the models A, B, and C are transported to the outside of the work area 2 by the transport device R, the work elements e6, e7, assigned to the worker 2
e11, e12, e13, e16, e17, e18 are performed.

Next, the work T for each production unit is sent to the work area 3 of the worker S3 in the third step by the transfer device R at regular time intervals. The worker S3 uses the jig C19 of the model C to perform the work element e19 of the model C. A common jig or tool is used for the other work elements e20, or the jig is not used. Thus, in the work area 3, the model C is transferred by the transport device R to the work area 3
The work elements e19 and e20 assigned to the worker S3 are executed before being transported to the outside.

As a result, the worker of each process is required to repeat the work elements of each model assigned to the worker of each process for six production units. That is, it is possible to repeatedly produce multiple types of work items at a frequency according to the production ratio, and the total work content and work element time for each production unit of workers in each process are kept constant. Become.

Another embodiment of the present invention will be described with reference to FIGS.

There are work items A1, B1, ..., J1 scheduled to be produced in the same manner as in FIG.
The results of grouping into groups are called models A, B, and C. Model A 18 units, model B 12 units, model C 6 units, total 36
It is assumed that the production of one unit is planned.

The method of organizing the grouped works P into a plurality of production units is performed as described with reference to FIG.

In FIG. 6, Q is a device for arranging the production order of the work pieces. j8 is the tool of model B used by S11, j1 is the tool of model A used by S12, j16 is S1
J is a model C tool used by 3 and j11 is a model B used by S14.
J2 is a model A tool used in S15, and j6 is a model A tool used in S16. R is a transfer device that transfers the work to a range (work area) in which each worker can work. T is a work for each production unit.

A method of arranging the production order of each work in the production unit will be described.

In the production unit, the number of the model A which is the work of the first group is 3, the number of the model B which is the work of the second group is 2 and the number of the model C which is the work of the third group. Is one.

When the number ratio is calculated by the calculating means, the model A
Is 3/6, model B is 2/6, and model C is 1/6. Next, the order determining means sorts the data according to the number ratio.

As a result, if the three units of the model A in the production unit are evenly distributed among the six units of the production unit, the model A is assigned so that one out of every two units in the production unit appears (A_A_
A_). Next, 2 units of model B in the production unit
Model B is allocated so that one out of three units will appear in the production unit if distributed evenly among units (ABABA
_). When the model C is similarly allocated, the model C is allocated so that one out of every six machines appears in the production unit, and the production order is "ABABAC". That is,
The production order of each work is arranged such that the work of each group appears at intervals with a frequency that is inversely proportional to the number of the work of each group in the production unit.

A method of arranging the workers who apply only the work elements related to the works of the same group of the production unit will be described.

Here, S11 and S14 are operators who apply work elements only for model B, S12, S15 and S16 are operators who apply work elements only for model A, and S13 is
This is an operator who applies the work elements of only model C.

As for the workers who apply only the work elements related to the work of the first group, the workers S12, S15, S16 whose number (3) is less than the number (3) of the work of the first group in the production unit. Are arranged in a line along the transfer direction of the transfer device, and the number of workers (2 units) or less in the production unit for workers who apply only the work elements related to the second group of works ( (2 persons) workers S11 and S14 are arranged in a line along the transport direction of the transport device, and the workers who perform only the work elements related to the work products of the third group are the work products of the third group in the production unit. The number of workers (one) equal to or less than the number (one) is arranged in a line along the transport direction of the transport device. Therefore, the workers of the first step are S11 and S12, the workers of the second step are S13, S14 and S15, and the workers of the third step are S16.

A method of distributing work elements to workers will be described with reference to FIG.

It is assumed that the work is conveyed at a time interval of 15 seconds.

Since the model A appears once in every two machines in the production unit, as described above, the operators S12, S15, and S16 who perform only the work elements of the model A are twice as long as 15 seconds. It takes 30 seconds to complete the work. Figure 7
In model A, the line for model A is the work element e1 to be applied in the first step,
The work elements e2 and e5 applied in the second step and the work elements e6 and e7 applied in the third step, each having a total time of 30
It is distributed so that it is close to seconds. The worker S12 works on the work element e1, and the worker S15 works on the work elements e2 and e5.
The worker S16 will apply the work elements e6 and e7.

Since the model B appears once in every three machines in the production unit as described above, the workers S11 and S14 who apply only the work elements of the model B are three times 15 seconds 45. Work will be completed in seconds. In FIG. 7, the row of the model B is the work elements e8 and e9 performed in the first step and the work elements e11, e12, and e13 performed in the second step,
The respective total times are distributed so as to be close to 45 seconds, and the worker S11 applies the work elements e8 and e9, and the worker S14 applies the work elements e11, e12 and e13.

Since the model C appears once in every six machines in the production unit, as described above, for the worker S13 who applies only the work elements of the model C, it is six times 15 seconds.
Work will be completed in seconds. In FIG. 7, the row of model C is the work elements e16, e17, e18 to be applied in the second process.
e19 and e20, which are distributed so that the time is close to 90 seconds, and the worker S13 applies the work elements e16, e17, e18, e19, and e90.

A method of securing a work area for each worker will be described.

The work area 1 is the work area (work area) of the worker S11, the work area 2 is the work area of the worker S12, and the work area 3, work area 4, work area 5,
Similarly, the work area 6 includes workers S13, S14, S15, and S.
It is assumed that there are 16 work areas. The total number of units produced in each group in the production unit is model A, which is the work of the first group.
Is 3, the model B, which is the work of the second group, is 2, and the model C, which is the work of the third group, is 1.

Here, an attempt is made to secure a work area for the worker S11. The worker S11 is a worker who applies only the work elements relating to the model B of the second group, and it suffices to apply the work elements only for the model B appearing in the work area of the worker S11, and the total work element time is It takes about 45 seconds. Further, the work is conveyed at a time interval of 15 seconds, and the frequency of appearance of the model B in the production unit is one in three machines. Therefore, if the worker S11 can perform the assigned work element and the work area is secured so that at least one model B, which is the work to be performed by the worker S11, appears in the work area of the worker S11. It becomes the work area 1. When the work area 1 is secured in this way, the model B appears at an interval of one in three units in the production unit, and the worker S11 displays the assigned work elements relating to the model B appearing in the work area 1. If the work is performed without any trouble, the worker S11 does not interfere with the work areas of other workers.

Next, an attempt is made to secure a work area for the worker S12. The worker S12 is a worker who applies only the work elements relating to the model A of the first group, and it suffices to apply the work elements only for the model A appearing in the work area of the worker S12, and the total work element time. Is about 30 seconds.
Further, the work is conveyed at a time interval of 15 seconds, and the frequency of appearance of the model A in the production unit is one in two machines.
Therefore, when the worker S12 can perform the assigned work element and the work area is secured so that at least one model A, which is the work to be performed by the worker S12, appears in the work area of the worker S12, the work area of FIG. Work area 2 is reached. If the work area 2 is secured in this way, the model A has 2 in the production unit.
If one worker appears at a frequency of one on the table and the worker S12 performs the assigned work element relating to the machine type A appearing in the work area 2 without any hindrance, the worker S12 creates a work area for another worker. It will not interfere.

Similarly, the workers S13, S14, S15,
Also in S16, the work area 3, the work area 4, the work area 5, and the work area 6 are secured. That is, in the work area of the worker who applies only the work elements relating to the work of the same group in the production unit, the work of the group performed by the worker always appears, and the worker performs the work on the transfer device R. Will carry out the assigned work element until it is transported out of the work area.

As a result, it is possible to eliminate the interference of the work area due to the difference in the work time for each model group of the work, and to reduce the work loss due to the setup work and the replacement of jigs and tools due to the change of the work content of the work equipment. In addition, the workability of each work facility can be improved.

In the above-mentioned embodiment, when the operator or the work equipment that applies only the work elements relating to the work of the same group within the production unit moves, and the number of jigs and tools for each model group used for the work is limited. Another embodiment of the present invention will be described with reference to FIG.

Model A 18 units, model B 12 units, model C
Suppose that the production of a total of 36 products of 6 units is planned.

Regarding grouping, refer to FIG. 2 and FIG.
Ri carried out as described.

The method of organizing the work P divided into groups into a plurality of production units is performed as described with reference to FIG.

S32, S22, ..., S32 are work equipments, S21, S27 are work equipments that apply only work elements of model C, S22, S24, S26, S28, S30, S.
32 is a work facility for providing only work elements of model A, S23,
S25, S29, and S31 are work facilities that apply only the work elements of model B. Work area i is work equipment S21, S2
2, ..., S32 is a range (work area) in which a work element can be applied.

J41, j47 are jigs and tools used when performing work with the model C in the work area i, j42, j44, j
46, j48, j50, j52 are model A in the work area i.
Jigs, j43, j45, which are used when performing certain work
Reference numerals j49 and j51 are jigs and tools used when performing work with the model B in the work area i.

R1 is a carrying device for feeding the work to the work area i, and R2 is a carrying device for carrying the work carried out in the work area i to another work area.

V is a transporting device for transporting the work carried by R1 at a certain time interval by rotating it in the direction of the arrow together with the work equipment and the jig.

U1 is a mounting device for moving the work carried by R1 to V and mounting it on a jig. U2 is a moving device that removes the work conveyed by V from the jig and moves it to R2.

Here, the work is carried by the carrying device R1 to the work area i at a time interval of 15 seconds, and the work is carried out at S21 and S2.
It is assumed that the total of each work element performed in 2, ..., S32 is 180 seconds.

Next, the operation will be described.

It is assumed that the transport device V is rotated, the work equipment S21 is in a state where the jig / tool j41 work is not attached, and the position thereof is between U1 and U2. It is also assumed that the other work equipments S22, S23, ..., S32 are rotated by the carrier device V while performing the assigned work elements. Here, S21 and j41, in which only the work of model C is performed, are conveyed to U1. At the same time, S32 is j5
2 is used to perform the assigned work element for the model A, and the model A and S32 and j52 for performing the work are both carried to the U2 by the carrying device V. j4
1 is in the state where the model C, which is the work, has been removed, and the model C, which U1 has been transported by the transport device R1, is moved to the transport device V and attached to the jig j1. At the same time, U2 removes model A from j52 and moves it to transport device R2.

During these operations, other work equipment S22,
S23, S24, S25, S26, S27, S28, S
29, S30, S31 are provided with work elements assigned to each work facility on the transfer apparatus V. When the work of U1 and U2 is completed, S32 is carried by the carrying device V in a state where no work is attached, and S31 and j51 are carried out.
Performs all the assigned work elements until it is transported to U2, and other work equipment also applies the assigned work elements. Next, when S32 is transported to U1 and S31 is transported to U2, U1 moves the model A transported by R1 to the transport device V, and attaches it to j52, as in the previous time. At the same time, the model B is removed from j51 by U2 and moved to R2. After that, these operations will be repeated.

When a jig for each model group is required in the line equipment as shown in FIG. 8, the production unit must be organized in consideration of the number of tools owned by each model group.
A method of mixing the works of each group and organizing them into a plurality of production units (mixed lots) of a fixed number will be described.

Model A for performing a certain work in FIG.
The number of jigs and tools owned by j42, j44, j46, j48,
There are 6 pieces of j50 and j52, and the number of model A as a production unit is 3. In addition, the number of tools owned by model B is j
There are four, 43, j45, j49, and j51, and the number of model B as a production unit is two. Further, the number of possessed jigs and tools of the model C is two, j41 and j47, and the number of the model C of the production unit is one. Since the number of each group in the production unit is less than the number of jigs and tools used by the work of each model group, it is not the number of jigs and tools owned,
According to the number of each group in the production unit, the work of each group is mixed and organized into a plurality of production units (mixed lots) consisting of a fixed number.

As a result of organization, model A, model B and model C
Will be 3: 2: 1. In this way, when there is a limit to the number of jigs and tools that can be owned, it is possible to reduce the work loss associated with the replacement of jigs and tools by organizing the production unit in consideration of this.

The order for each model group in the production unit is determined as described with reference to FIG.

A method of installing working equipment on the carrier V will be described.

The working equipment for carrying out the work on the transport device V is arranged so as to correspond to an integral multiple of the production unit and the production sequence for each model group in the production unit. Therefore, 12 units, which is twice as many as the production unit of 6, are installed on the transfer device V.
"ABABAC" order for each model group in the production unit
Corresponding to, the work equipment S21, S22, ..., S3 for applying only the work elements related to the work in the same group of the production unit
2 is arranged with jigs j41, j42, ..., J52. By arranging in this way, it is possible to reduce the exchange of jigs and tools due to the change of work contents, and the work carried to V by R1 can be sequentially attached to the jig and worked, and the work to R2 can be carried out. Can be sent without changing the production order.

A method of determining the time for one rotation of the transport device V will be described.

The time required for the conveyor device V to make one revolution is equal to or greater than the maximum value of the work element time provided by each work facility in the work area i, and is an integer multiple of the time interval during which the work piece is conveyed to the work area i by the carrier device R1. Try to be. Therefore, the transfer device V may be rotated once in 180 seconds, which is 12 times 15 seconds, which is the time interval in which the work is transferred to the work area i by the transfer device R1.

In the line equipment in which the work equipment rotates together with such a transfer device, the area required for performing work is (area for performing work on one work piece) × (in the work area). The number of works to be worked) may be sufficient.

Further, by sending the work for each production unit to the work equipment at a constant time interval, it is possible to reduce the setup work associated with the change of the work content and the work loss associated with the replacement of jigs and tools.

According to the present invention, a plurality of types of work products are repeatedly produced at a frequency according to the production ratio, and the total work content and work element time for each production unit in each work facility are kept constant. Therefore, it is not necessary to change the transfer time interval even when a plurality of models are produced by a single line, and the fluctuation of the total value (work load amount) of the work element time in each work equipment is reduced.

Further, it is possible to reduce the work loss associated with the change of the work contents of the work equipment and the work loss associated with the replacement of the jigs, and improve the workability of each work equipment. Even when a model is produced, work equipment changes and setup work associated with model switching are reduced.

Further, since the interference of the work area due to the difference in the work time for each model group of the work can be reduced, the workability of each work facility is improved even when a plurality of models are produced by a single line.

[0086]

According to the present invention, a plurality of types of work items are sent by the transfer device, and a plurality (a large number) of work equipments are installed in a row along the transfer direction of the transfer device. It is possible to provide a line production support system that enables a plurality of types of work products to be produced in a fixed period on a production line for applying work elements.

[Brief description of drawings]

FIG. 1 is a block diagram of a line production support system according to the present invention.

FIG. 2 is an explanatory diagram showing contents of work elements of ten types of work objects in FIG.

FIG. 3 is a flowchart in the case of a first example in which FIG. 2 is classified by grouping by weighting each row and each column and aggregating them.

FIG. 4 is a flow chart showing the operation of the line production support system .
It is a chart.

FIG. 5 is an explanatory diagram showing a result of evenly assigning work elements to each process in FIG.

FIG. 6 is a plan view showing another embodiment of the production line system according to the present invention.

FIG. 7 is an explanatory diagram showing a result of evenly assigning work elements to each process in FIG.

FIG. 8: For line equipment in which both the transfer device and work equipment move
It is a top view showing one example to which a line production system by the present invention is applied.

FIG. 9 is a plan view showing an embodiment of a production line system according to the present invention.

FIG. 10 is a hardware configuration diagram of a line production support system.

[Explanation of symbols]

P ... Work, A, B, ..., J ... Model, Q ... Loading device, R, R1, R2 ... Conveying device, V ... Conveying device, U1
... Mounting device, U2 ... Movement device, T ... Production unit, S1
~ S3, S11 to S16 ... Workers, S21 to S32 ...
Work equipment, e1 to e20 ... Work elements, j1 to j20,
j41 to j52 ... Tool name, Ta to Tj ... Work element time.

─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hirotaka Morita 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa, Ltd. Inside the Hitachi, Ltd. Institute of Industrial Science (72) Inventor Nobuo Kojima 800 Tomita, Ohira-cho, Shimotsuga-gun, Tochigi Prefecture Hitachi, Ltd. Tochigi factory (56) References JP-A-4-25349 (JP, A) JP-A-60-20844 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) G05B 19/418 G06F 17/60

Claims (8)

(57) [Claims] 1. A single production line in which a plurality of types of work products are carried by a carrying device, and a series of work elements are applied to the work products by a plurality of work equipments installed along the carrying direction of the carrying device. A line production support system for supporting operations, comprising: input means for receiving information on a classification index based on at least the type of work element for classifying a work; and a weighting coefficient according to the at least one classification index. A classification unit for classifying a plurality of types of work into a plurality of groups and a work unit of a fixed number by mixing the work of each group according to the total production quantity of the work of each group (mixed lot) A line production support, which has a knitting means for knitting, a deciding means for deciding a production order of each work in the production unit, and an output means for outputting the obtained production order. Assistance system. 2. The line production support system according to claim 1, wherein the input means receives, as a classification index, information about work elements and work equipment of a plurality of types of works sent to the line. 3. The deciding means comprises a computing means for obtaining a ratio of the total production quantity of each group, and an order deciding means for causing the work of the group to appear on the line at a frequency proportional to the quantity ratio. The line production support system according to claim 1 or 2 , characterized in that. 4. Production by a single line in which a plurality of types of work products are carried by a carrying device, and a series of work elements are applied to the work products by a plurality of work equipments installed along the carrying direction of the carrying device. In the method, by providing a feeding means for feeding the work in each of the production units to the transfer device at a constant time interval according to the production sequence obtained by the line production support system according to claim 1, 2, or 3 , A multi-product line production method characterized in that a work product of a plurality of products is produced according to the number of products produced. 5. A production plan for a production line, in which a plurality of types of work products are carried by a carrying device, and a series of work elements are applied to the work products by a plurality of work equipment installed along the carrying direction of the carrying device. In the generation method, the information on the types and work elements of the work of the plurality of types is read from the storage means, based on the information, the work data of the plurality of types is classified into groups, the work data of each group, According to the production number of the work data for each group, it is organized into a production unit (mixed lot) consisting of a certain number of units, the production order of each work in the production unit is determined, and information of each group, It is possible to output the information of the production unit and the information of the production order of the determined works as control information to the production line. Production planning method. 6. A method for generating a production plan for a production line, in which a plurality of types of work are conveyed and a series of work elements are applied to the work by a plurality of work facilities, wherein a classification index of the plurality of types of work is used. Type of the work
And a step of reading information about work elements from the storage means, a step of classifying the work data of the plurality of types into groups by the arithmetic processing means based on the information, and work data of each group for each group. A step of organizing a production unit (mixed lot) consisting of a fixed number according to the number of productions of the work data; a step of deciding a production sequence of each work in the production unit and outputting decision information; A line production planning method for a plurality of products, which outputs group information, production unit information, and production order production information of each determined work. 7. A method of generating a production plan for a production line, in which a plurality of types of work are conveyed and a series of work elements are applied to the work by a plurality of work equipment, wherein a classification index of the plurality of types of work is used. Type of the work
And a step of inputting and storing information on work elements in the storage means, a step of classifying the work piece data of the plurality of types into groups by the arithmetic processing means based on the information, and work piece data of each group, A step of organizing a production unit (mixed lot) consisting of a fixed number according to the production number of work data for each group, and a step of determining the production order of each work in the production unit and outputting decision information And a line production planning method for a plurality of products, which outputs the information of each group, the information of the production unit, and the information of the production order of the determined work. 8. The line production planning method for a plurality of products according to any one of claims 5 to 7 , wherein when determining the production sequence of each work in the production unit, the production order is determined according to the proportion of each work included. A method of line production planning for a plurality of products, characterized in that the sequential arrangement is determined so as to be dispersed.