JPS61265252A - Production-rate controller for work in production line - Google Patents

Abstract

PURPOSE:To simply set and change the data and make the whole apparatus into small-sized by using the combination of the work feeding order data and the thinned-out data. CONSTITUTION:When no prescribed-value detection signal is outputted from limit switches 22A-C, the work feeding signals for a various sorts of part materials are outputted in succession from the supplied-work calculation circuit of a production-rate controller 18 on the basis of the feed order data for the works on the basis of a prescribed standard production rate. Further, when one of the stock quantity among the posterior process stock lines 14A-C becomes over a prescribed value, this state is detected by each limit switch 22A-C. The production-rate controller 18 performs thinning-out processing by combining the feed order data for the works of the part material corresponding to the posterior process stock line 14 having he value larger than the prescribed value with the thinned-out data, and increases the production rate, and automatically controls the stock quantity below the prescribed quantity. Therefore, the number of data can be reduced, and the preparation and change of the data is facilitated.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a production ratio control device for workpieces in a production line, particularly for the production of workpieces supplied from a pre-process stock line to a post-process stock line via processing means. This invention relates to improvements in devices for controlling ratios.

[Conventional technology] Background technology Conventionally, the process of processing parts materials to produce various parts, assembling the various parts produced, and supplying them to sections has been carried out continuously on a series of conveyance paths. BACKGROUND ART Continuous production loading is well known, and is used, for example, in a vehicle assembly line in a factory, where each assembly produces and supplies the necessary types of parts for each section in the required number of meters.

By the way, in each assembly section on such an assembly line, the type and number of parts to be assembled on a vehicle are determined in advance. For this reason, the corresponding assembly [no section requires the required type,! There are multiple stock lines where 1 parts are stocked by part, and workers in the assembly section can stock the necessary types of parts as needed.
They are taken out one by one and supplied to the assembly line.

FIG. 7 shows such a production device for supplying parts, and this production device includes a plurality of pre-process stock lines 10A and 10B provided corresponding to various workpieces,
Part materials 10 supplied from this pre-process stock line
0A-, 100B" are processed into predetermined parts by the processing device 12, and the processed parts 100A and 100B are sequentially put into stock on each post-process stock line 14A and 14B provided for each part. There is.

Therefore, the post-process stock lines 14Δ, 14B are
For example, the assembly adjacent to the vehicle assembly line will be set up in a section, and the assembly worker in the section will be assigned to the post-process stock line 14A.

It becomes possible to take out the necessary parts 100A and 100B from 14B and assemble them into the vehicle.

Here, as described above, the types and number m of parts 100A and 100B required on the assembly line are determined in advance. Therefore, each post-process stock line 14A,
It is preferable that the corresponding various parts 100A and 100B be stocked in the required number 11LIiU and rllffi in the storage 14B.

For this reason, such a production device for supplying parts is provided with a production ratio control device 18 in which a standard production ratio of parts 100A and 100B is set in advance, and this production ratio control device 18 Based on the standard production ratio, parts input signals are sequentially output to each pre-process stock line 10A, 10B.

When the input signal is output in this way, the input device H
20 is activated to supply the processing device 12 with the component material designated by the input signal from each stock line IOA or 10B.

Therefore, in this production equipment, the various parts required on the assembly line are 100A.

100B will be produced at a ratio according to the required dispersion, and will be stocked within 14B, with the return process stock lie >14Δ.

However, normally in such a production line, on the processing line where the processing device 12 is installed, there are steps such as eliminating defective materials and defective products, replenishing reworked products, etc.
There are factors that change parts production.

Therefore, if the supply ratio of component materials 100A'' and 100B'' supplied from the pre-process stock line 10A and IOB is fixed, then the post-process stock line 14A and 14B
There is a problem that the quantity of one of the parts 100A or 100B is insufficient or increases, and in the worst case, there is a problem that the stock of one of the types of parts becomes zero.

In addition, there are 100 various parts that are needed on the assembly line.
Even if the ratio of the number M of A and 100B is set to be constant in the final total of the day, the parts 100A and 100B requested by the assembly line during the day;! L'1 go often fluctuates.

In such a case, as mentioned above, the parts material from the front culm stock line 10A, IOB 100△+, 1o
If the supply of os- is set to a constant value, there is a problem that 100Δ or i 00F3 of one of the parts will be insufficient or increased.

For this reason, in such production equipment, limit switches 122A and 22B are generally provided in each post-process stock line 14A and 14B as prescribed deviation detection means.
Furthermore, limit switches 24A and 24B are provided as pool over detection means.

Limit switches 22A and 22B for detecting the specified seedlings
outputs a specified quantity detection signal to the production ratio control device 18 when the parts stock m of the corresponding stock lines 14A, 14B reaches a predetermined specified color, and also outputs a limit switch 24A, 24B for detecting pool over. Similarly, it detects pool over of the parts stocks on each stock line 14A and 14B, and outputs the detection signal to the production ratio control device 18.

The production ratio control bag V118 has ratio changing means, and has the limit switches 22A and 22 for detecting the specified value.
In order to optimize the stock ratio of parts 100Δ and 100B in each subsequent process stock line 14A and 14B based on the signal from
The supply ratio of component materials 100A' and 100B- from 100B and 10B is switched and controlled.

By doing this, the return process stock line 14
Parts A and 14B are always stocked with parts 100A and 100B at an optimal ratio regardless of various parts production fluctuation factors, and there is no shortage or increase in certain parts. As a result, vehicles can be assembled smoothly on the assembly line using the parts 100A, 100B stored in the stock lines 14A, 14B.

Prior Art FIGS. 8 and 9 show the main parts of a conventional production ratio control device 18, and this conventional device connects a plurality of rotary cams 30, 32, 34, 36 to the same rotating shaft 38. The installation is fixed, and this rotating shaft 38 is connected to the reducer 4 by a motor 40.
2 so that it is always rotated one pitch at a time in one direction.

Each of the rotary cams 30.32, 34.36 consists of a rotating disk and a plurality of pins P provided around the disk for operating limit switches. On the rotation trajectory plane of P, there is a limit switch, LSI, and L which are turned on by the pin P.
S2. LS3°LS4 are installed.

FIG. 10 shows each of these limit switches LS1 to LS4.
Each rotary cam to turn on and off 30.32.34.36
The mounting state of the pin P above is shown, and in the embodiment, each rotary cam is mounted at stations N0=1 to 30'S apart from the rotating disk in its rotational direction, as shown in FIG. 3o are provided, and these stations N
= Part material 100A based on the material supply ratio of parts 100A and 100B by bin P at a desired position on 1 to 30
Supply order data of ", 100B" is set.

And each of these rotary cams 30.32.34.36
Part material 100A” set above.

100B'' supply order data indicates that each time these rotary cams are rotated by one pitch, the limit switch LS
1. LS2.183. The data is read out by LS4, and a component input signal is output based on the read order data.

Here, the bin setting ratios of the rotary cams 30.32, 34°36 are set to 8:19:20:21, respectively, and this conventional device has a limit switch 22A,
These rotary cams are appropriately combined based on the signals input from 22B, 24A, and 24B, and a component input signal is output in accordance with the supply order data.

That is, in the state of pattern (2) in which the rotary cams 30 and 34 are combined, the input order data of the component materials 100A'' and 100B' are set according to a predetermined standard production ratio of 8:20. In the state of pattern (2) in which the above are combined, the supply order data of the component materials 100A- and 100B'' is set based on a production ratio of 8:21. Also, 〇-Talicum 30
In the state of pattern (2) where and 36 are combined, the supply order data for the component materials 100A'' and 100B- is set based on a production ratio of 8:19, contrary to the production ratio described above.

FIG. 11 shows limit switches 22A, 228 and 24.
A, 24B output, that is, post-process stock line 14
The operation pattern of conventional equipment d corresponding to the parts stock status in A and 14B is shown.

As is clear from the same figure, the post-process stock line 14
When the stocks of parts 100A and 100B in A and 14B are well balanced, the production ratio control device 1
8, part materials 100A- and 100B- are supplied from the pre-process stock lines 10A and 10B according to the combination of patterns, that is, the supply order data (standard production ratio A:B=8:20>) instructed by the rotary cams 30 and 34. As a result, the parts 100A are supplied in the post-process stock lines 14A and 14B.
and 100B will continue to be stocked in a well-balanced manner.

In addition, in the post-process stock lines 14A and 14B, if the stock m of the component 100A is too large for the component 100B, the component material 100A is ", 100B- is supplied. Here, the production ratio of the rotary cam 30.36 is A:8-8:21, and the ratio of the component material 100B' exceeds the standard production ratio. Therefore, the post-process The ratio of the parts 100A and i-oos stocked in the stock lines 14A and 14B will be corrected to the standard production ratio.

On the contrary, post-process stock lines 14A and 14B
In this case, if the stock amount of the part 100B is too large for the part 100A, the rotary cam supplies the part materials 100A' and 100B' according to the combination of pattern (3), that is, the supply order data instructed by the rotary cams 30 and 32. The production ratio data indicated by 30.32 is A:B-8:19, and the production ratio of the component material 100B' is somewhat lower than the standard production ratio. For this reason, parts 100A are stocked in post-process stock lines 14A and 14B.
The ratio of 100B and 100B will be corrected to become the standard production ratio.

In this way, this production ratio υJtll device has 83
Item 100 A and U 100 B (7) Stotsu')
firi 1. :N Tsuki, part material 100A' supplied to the processing equipment.

By controlling the production ratio of 100B', it is possible to always keep the stock 0 of parts 100A and 100B in the post-process stock lines 14A and 14B at an appropriate value close to the standard setting ratio.

[Problems to be Solved by the Invention] However, such a conventional input vehicle determining device uses a rotary cam 30 for setting a standard input ratio based on pattern
and 34, as well as rotary cams 32 and 36 for setting production ratios based on patterns (1) and (2), which has the drawback that the entire device becomes extremely large.

In particular, with such a conventional device, when supplying the two types of parts mentioned above, only four rotary cams are required, but as shown in Figure 10, when there are three or more types of parts to be supplied, only one type of rotary cam is required. Each time the number of rotary cams increases, three rotary cams must be added, and as a result, the entire device becomes extremely large and expensive, and an effective countermeasure has been desired.

Furthermore, as mentioned above, in such conventional devices, the number of rotary cams used is extremely large, so setting the position of the bin P provided on each rotary cam is extremely complicated, and as a result, it is difficult to set and change data. The disadvantage is that it requires an extremely large amount of time and effort.

1. The present invention was made in view of such conventional problems, and its purpose is to easily set and change data, and to minimize the overall size of the device. The object of the present invention is to provide a system for controlling the production ratio of workpieces in a production line.

[Means for Solving the Problems] In order to achieve the above object, the apparatus of the present invention includes a plurality of pre-process stock lines that are provided corresponding to a plurality of workpieces and sequentially supply the corresponding workpieces based on a workpiece input signal. , a processing means for processing the workpieces supplied from the preprocessing stock line, and a plurality of postprocessing stocklines for storing the processed workpieces by workpiece; A plurality of specified amount detection means that output a detection signal when the stock amount reaches a predetermined specified amount, workpiece supply order data in which the supply order of each workpiece is determined according to a predetermined standard production ratio, and this supply order data. a workpiece information storage means in which thinning data for thinning out the supplied workpieces set in the data processing apparatus is pre-stored; A work input signal is output, and if a specified amount detection signal for any of the processed workpieces is output from the specified amount detection means, the corresponding work is thinned out from the supply order data based on the thinning data, and the thinned out processing is performed. and an input workpiece calculation means for outputting a workpiece input signal based on supply order data of the workpieces, and is characterized by automatically adjusting the stock amount of processed workpieces in the post-process stock line to a value equal to or less than a predetermined amount. .

[Function] With the above configuration, when the stock m of various workpieces sent to the post-process switch line is in a well-balanced state, that is, when no detection signal is output from the specified amount detection means, the ratio information is stored. Workpieces are sequentially supplied to the processing means from the pre-process stock line according to workpiece supply order data stored in the means.

As a result, various processed workpieces are continuously supplied to the post-process stock means so as to achieve a predetermined standard production ratio.

In addition, for some reason, the balance of the stock m of various parts in the post-process stock line is disrupted, and the specified amount detection means outputs a detection signal that detects that the stock amount of one of the processed workpieces has reached a predetermined specified amount. In this case, the corresponding workpieces are interrogated based on the thinning data from the workpiece supply order data, and various workpieces are sequentially transferred from the pre-process stock line to the processing means based on the thinned-out workpiece supply order data. supply.

As described above, according to the present invention, since the workpieces that have reached the specified ω are thinned out using the thinning data and then supplied to the processing means, the ratio of the workpieces stored in the post-process straggling line gradually decreases. The production ratio will be automatically corrected to a predetermined production ratio.

As described above, according to the present invention, the work supply type V-T-
Since it is possible to automatically input workpieces and compensate for the production ratio based on the ratio of the predetermined raw material ρ based on the data and thinning data, the amount of data used is extremely small compared to the conventional equipment mentioned above. This makes it possible to downsize the entire device and to easily set and change data.

1 Embodiment] Next, a preferred embodiment of the present invention will be described based on the drawings. Note that the same reference numerals are given to the members corresponding to those of the conventional device, and the explanation thereof will be omitted.

First Embodiment Production Apparatus for Supplying Parts FIG. 2 shows a production apparatus for supplying parts used in this embodiment. and 100C" are processed by the processing device ff12 based on a predetermined production ratio to produce three types of parts 100Δ, 100B and 100G.

That is, the component materials 100A-, 1008' and 1000' conveyed by a predetermined conveyance line are sorted by the sorting machine 5.
0 and the corresponding pre-process stock line IO
They are sequentially stocked in A, 10B and 10C.

Then, when the production ratio is 1 t and a work input signal is input from the 1IIIHffi 18 to the input bag 2220, this input bag [20 supplies the component material designated by the work input signal to the processing device 12 from the pre-process stock line 10. do.

At this time, the end of the supply operation of the component material to the processing device 12 is detected by the detection switch 52, and the production ratio control device 18 sends a new work input signal to the input device 20 every time a detection signal is input from the detection switch 52. Output direction.

The processing device 12 processes the component materials inputted in this way into desired components, and the processed components are sorted by type by a sorter 54 and sequentially sent to the corresponding post-process stock lines 14A, 14B, and 14C. Stocked.

In this way, the return process stock line 14A,
Each iH? stocked in 14B and 14C? +100
A, 100B, and 1ooC are assembled into parts by the loading device 56 and transported to the section.

Production Ratio Control Device FIG. 1 shows a preferred first embodiment of the production ratio control device 18 of the present invention.
An embodiment is shown, which device includes a ratio information storage means 60 and an input work field circuit 62.

The ratio information storage means 60 stores each part material 100A=, 100B- and 100C- according to a predetermined standard production ratio.
Workpiece supply order data in which the supply order of the workpieces is determined, and thinning data for thinning out the supply of component wood set in the workpiece supply order data are stored in advance.

A characteristic feature of the present invention is that various parts 100A can be produced by appropriately combining the work supply order data set in this way and the thinning data.

The production ratio of 100B and 100C can be adjusted as necessary.

By doing so, according to the present invention, the number of data to be used is extremely small compared to conventional devices, and as a result, data can be stored with a small memory capacity ω, and moreover, each data Settings and changes can be made extremely easily.

In this embodiment, this ratio information storage means 60 is formed using a plurality of rotary cams.

That is, in the embodiment, the ratio information storage means 60 is
Three rotary cams 64 with component input order data set for each component material 100A', 100B-, and 1000'
A, 64B, and 64C, and one rotary cam 66 in which the thinning data is set, and each of these rotary cams 64A.

648, 640, and 66 are fixedly attached to a common rotating shaft 38, and are configured to be rotated one pitch at a time by 7-940 via a decelerator 42.

In FIG. 3, each of the rotary cams 64△, 64B, 64
The configurations of rotary cams C and 66 are shown, and the stations 1 to 30 for mounting each of these rotary cams are appropriately provided with bins P indicating supply order data and thinning data for works of various component materials.

FIG. 4 shows the work input data and thinning data set in this way, and each data is represented by a black circle corresponding to the station number of each rotary cam.

And the bin P attached to each of these stations
As a result, the corresponding limit switches LS1 to LS4 are driven, and this signal 8 is output to the input work calculation circuit 62.

33, this input work calculating circuit 62 determines the stock status of parts in the post-process stock lines 14Δ, 14B, and 14C based on the outputs of the limit switches 22A, 22B, and 22C, and based on this determination result. The supply order data of each workpiece of the rotary cams 64Δ, 64B, and 64C inputted from the ratio information storage means 60 and the thinning data inputted from the rotary cam 66 are combined as appropriate. And each post-process stock line 1
Various parts 100A in 4A, 14B and 14C,
A work input signal is output to the input device 20 so that 100B and 100C are stocked according to a predetermined production ratio.

That is, when the specified amount detection signals are not output from all the limit switches 22Δ, 22B, and 22C, the post-process stock line 14Δ.

It is determined whether the stock status of parts in 14B and 14C is appropriate according to a predetermined production ratio. In this case, each rotary cam 64A.

Work input signals are sequentially output in accordance with the supply order data for the workpieces of various component materials set in 64B and 64G.

Also, any limit switch 22△, 22B, 2
When a specified amount detection signal is output from 2G, the ratio of the parts stock amount corresponding to this specified 1 detection signal to other parts stock amounts is greater than a predetermined standard production ratio. It is determined that the work supply order data of the part concerned is combined with the thinning data to perform the thinning process.

Then, the input work calculation circuit 62 outputs the work input signal only according to the work supply order data for the parts for which the specified amount detection signal is not output, and for the parts for which the specified value detection signal is output, A work input signal is output in accordance with the thinned-out work supply order data.

For example, each rotary cam 64△, 64B, 64C and 6
6 faces the detection limit switches LSI to LS4 at the station number N0=1, as is clear from FIG.
1 and LS4 are turned on, and a command to input the component material 100A- is input to the input work calculation circuit 62.

At this time, if ON No. 12, that is, a specified detection signal, is input from the limit switch 22A to the input work calculation circuit 62, the input work operation stop circuit 62 detects a component that is in the post-process stock line 14A. It is determined that the stock output of 100A is more than the specified amount, and it is determined whether thinning data is set in the station number NO1 of the rotary cam 66. At this time, since the limit switch -$4 is turned on, it is determined that thinned data is set. Then, regardless of whether LSl is turned on or not, the input work calculation circuit 6°2 does not output the uneven work input signal at station number N0=1, and drives the motor 40 to move each rotary cam one pitch. Rotate and set station number N0=2.

Further, when the rotary cam is set to station number No. 2, as is clear from FIG. 4, an on signal of LS2 instructing to input the component material 100B- is inputted to the input work calculation circuit 62. At this time, despite the outputs of the limit switches 22A, 22B, and 22C, no ON signal is input from the limit switch S4 representing the thinning data, so the input work calculation circuit 62 unconditionally selects the part material 100B'. A work input signal instructing input is outputted to input bag ffff20.

When the detection switch 52 detects the completion of loading the component material 100B- by the loading bag M20, the loaded work calculation circuit 62 drives the motor 40 to rotate the rotary cam one pitch and set the station number to N0=3.

In this state of station number N0=3, limit switch LS3 is turned on, and limit switch LS
4 is turned off, the input work calculation circuit 62 unconditionally outputs a work input signal instructing the input of the component material 1ooc-.

Such operations are repeated in sequence, and when the station number of the rotary cam reaches the position t of N0 = 5, the input work calculation circuit 62 receives the on signal of the limit switch LS2, which instructs the input of the component material 100B', and the thinning data. The ON signal of LS4 shown in FIG.

At this time, when the specified value detection signal is not output from the limit switch 22B, the input work calculation circuit 62
Regardless of the existence of thinned-out data, a work input signal instructing input of the component material 100B' is output in accordance with the ON signal of the limit switch LS2.

Furthermore, if the specified value detection signal is input from the limit switch 22B at this time, the input work calculation circuit 62 determines that the stock 1 of the component 100B in the post-process stock line 14B has exceeded the specified value. Then, based on the thinning data inputted through the limit switch LS4, the work supply order data of the component material 100B'' inputted through the limit switch LS2 is thinned out, and no work input signal is output.

In this way, according to the invention, the limit switch 2
If no specified value detection signal is output from 2A, 22B, and 22G, limit switch LS1. L
S2. Work input signals for various component materials are sequentially output from the input work calculation circuit 62 based on work supply order data based on a predetermined standard production ratio inputted via the LS3.

In addition, post-process stock lines 14A, 14B, and 14C
If the stock amount of any one exceeds a specified value, this will be detected by limit switches 22A, 22B, and 22G, respectively.

Then, the production ratio tIII@ device 18 performs a thinning process by combining the supply order data of the workpieces of the parts materials corresponding to the post-process stock line 14 that exceeds the specified value with the thinning data, and determines the input ratio of the parts materials concerned. The production ratio is lowered to a preset production ratio, and the stock position in the post-process stock line 14 is automatically controlled to be below the specified M.

As described above, according to the present invention, it is possible to relatively increase/decrease the supply ratio of various component materials by appropriately combining the thinning data with the work supply order data of each component material and performing the thinning process. Therefore, it is possible to satisfactorily adjust the stock amount of various parts in the post-process stock lines 14A, 14B, and 14C to appropriate values.

Note that such a post-process stock line 14A.

The fluctuation absorption width of the component stock m in 14B and 14C can be adjusted as appropriate by the thinning data set in the rotary cam 66, that is, the set number of bins P.

In addition, as another method different from the present invention, for example, when it is determined that the stock melon of any part in the post-process stock lines 14A, 14B, and 14C exceeds a specified value, the part material corresponding to the part is supplied. It is conceivable to completely stop the supply of parts and restart the supply of parts materials when the parts stock m falls below a specified value. Due to the time lag before reaching the post-process stock line, stock parts may be out of stock in the next process.

However, in the present invention, in such a case, the work supply order data of the part i material is thinned out based on the thinning data, and the supply ratio of the part material is adjusted to the preset production ratio. The supply of the parts material will continue. Therefore, there is no risk of stock parts being out of stock due to the time lag as described above.

In addition to the basic operation described above, the input work calculation circuit 62 of this embodiment also operates the post-process stock line 14A,
Detection signals from limit switches 24A, 24B, and 24C for detecting pool over of parts in 14B and 14C are also used to output more detailed work input signals.

In other words, the input work calculation circuit 62 of the embodiment performs the processing on the post-process stock lines 14A, 14B, and It is judged that 14C is Manpoi. Regardless of the input from the ratio information storage means 60, the work input signal is not output, and the previous process stock lines IOA, 10B, and 1
The flow of part materials from 0C to the processing device 12 is temporarily stopped.

In addition, each of these limit switches 24A, 24B and 2
When the pool over detection signal outputted from any one of 4C turns off, the input work calculating circuit 62 receives the input from the limit switches 22A, 22B, and 22C and the ratio information storage means 60, as in the case described above. Resume output of work input signal based on .

Further, the input work calculation circuit 62 of the embodiment is configured to detect when a specified value detection signal is output from all of the limit switches 22A, 22B and 22G.In such a case, the line downstream from the post-process stock line 14 (assumed to be in a stopped state), the existence of thinned data is ignored and the limit switch 24A for pool over detection,
Work input signals are output until all of 24B and 24C output pool over detection signals.

By doing so, in the apparatus of the embodiment, it becomes possible to appropriately control the stock amount of various parts in the post-process stock lines 14A, 14B, and 14C to a value below the specified value without overflowing.

111 units (E1) Figure 5 shows a preferred second unit of the production ratio control device according to the present invention.
An embodiment is shown, and the feature of this embodiment is that the production ratio i control device 18 is configured using a BUO grammar controller.

In this embodiment, the RAM 70 is used as ratio information storage means.
is provided, and an input work calculation section 72 is provided as input work calculation means.

The RAM 70 and the input work calculating section 72 correspond to the ratio information storage means 60 and the input work calculating circuit 62 of the first embodiment shown in FIG.

In the RAM 70, the work supply order data and thinning data shown in FIG. 4 are stored as numerical codes based on the following equation.

C1=Ni+100M However, i...Station number N...If there is no part material to be supplied, O1 If the part material to be supplied is 100A', 1.100B', 2.100C- is set to 3.

M...If a thinning day is set, 11. If not set, it is set to O.

Therefore, as shown in FIG. 4, for example, coded data with station number N0=1 is 1=1. N=1.
M-1, and its value is given as C1-1oi. Furthermore, the coded data for station number N=2 is similarly set as i=2)N=2 and M=O,
Its value is given as C2=2.

In addition, limit switches 22A, 22B, 2
2G, 24A, 248, 240 and detection switch 52 signals are input.

This input work performance section 72 has an R
The operation pattern shown in FIG. 6 is preprogrammed in the OM, and the data stored in the RAM 70 is sequentially read out according to the station number. Then, based on the signal input via the input interface 76, a work input signal is calculated in the same manner as in the first embodiment, and the calculated work input signal is output to the output interface 7.
8 to the input device 20 sequentially.

In addition, FIG. 6(A) represents the supply pattern of the component material 100A'', (B) represents the supply pattern of the component material 100B'', (C)
represent the supply pattern of the component material 100C-, respectively.

Here, the circle mark indicates the component material 100A-.

Input according to the supply order data of 100B'' and 100C' (means outputting No. 8).

Further, * means that the following oil cylinder operation is performed according to the outputs of the limit switches 22 and 24. However, when all of the limit switches 22A, 22B, and 22C are turned on, the component element t1100A' follows the supply order data.

The input signals of 100B' and 100C- are outputted. In addition, limit switches 24A, 24B and 24C
If all of the limit switches 22A, 22B, or 22C are turned on, the output of the closing signal is temporarily stopped until an off signal is output from one of the limit switches 22A, 22B, or 22C. In other cases, regardless of the readout of component material supply order data, the corresponding input signal is not output, and the data of the next station number is read out.

Also, ** indicates limit switches 22A, 22B and 2
This means that unless ON signals are output from all of the 2Cs at the same time, the input signal is not output and the data of the next station number is read.

As is clear from the circulation, the production ratio control device 18 of this embodiment sequentially outputs workpiece input signals to the input device 20 in the same manner as the device of the first embodiment, and as a result, the post-process stock is Lines 14A, 14B and 14C
The stock condition inside the cylinder is always well controlled to an optimum condition.

In this embodiment, data is read from the RAM 70 in order from the station number N=1 to the thickest one, and when the station number reaches the maximum value, the data of the station number N=1 is read again. This will be carried out sequentially from

Furthermore, since the device of this embodiment is formed using a programmable controller, it is possible to easily write and change data in the RAM 70 as necessary.
Furthermore, since the entire device is constructed using semiconductor elements, it can be made much smaller and lighter than the first embodiment.

In the first and second embodiments, the present invention is applied to an apparatus for producing vehicle parts, but the present invention is not limited to this. Needless to say, this method is also effective for devices that produce other workpieces.

In addition, in the above Example IIIA, two or three types of
Although the explanation has been given using an example of controlling the stock amount of different types of parts, the present invention is not limited to this, and the production ratio of three or more types of parts can be adjusted to the stock a in the post-process stock line. This enables good control.

[Effects of the Invention] As explained above, according to the present invention, by using a combination of work supply order data and thinning data, it is possible to extremely reduce the amount of data used compared to conventional devices. As a result, data can be easily created and changed, and the entire device can be made extremely small and simple.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a preferred first embodiment of the production ratio control device according to the present invention; FIG. 2 is an explanatory diagram of a parts production system δ formed using one equipment shown in FIG. 1; Figure 3 is an explanatory diagram of the rotary cam used in the device shown in Figure 0'11, and Figure 4 is shown in Figure 1. Fig. 5 is a block diagram of the second preferred embodiment of the present invention; Indicates the vJfl pattern of ′i
j explanatory diagram, Figure 7 is an explanatory diagram showing the general configuration of parts production equipment, Figures 8 and 9 are explanatory diagrams of conventional one production ratio setting IT, II control equipment, Figure 10 is an explanatory diagram showing the general configuration of parts production equipment. and Fig. 9 is an explanatory diagram showing the work supply order data set in the conventional device and its supplement IY-Y, and Fig. 11 is an explanatory diagram showing the operation pattern of the conventional device based on Figs. 8 and 9. It is. 10A, IOB, 10C... Front culm stock line 12... Processing equipment 14A, 14B, 14C... Rear culm stock line 18... Production ratio control device 22A, 22B, 22C... Limit switch Tubu 24
A, 24B, 24G ・・・ Limit switch 60
... Ratio information storage means 62 ... Input work calculation circuit 100A'', 100B-, 100C- ... Part materials 100A, 100B, 100C ... Part 70 ...
・RAM

Claims (5)

[Claims] (1) A plurality of pre-process stock lines that are provided corresponding to a plurality of workpieces and sequentially supply the corresponding workpieces based on a work input signal, a processing means that processes the workpieces supplied from the pre-process stock line, and a processing workpiece. In a production line including a plurality of post-process stock lines that store processing workpieces for each workpiece, and a plurality of regulations that are installed in each post-process stock line and output a detection signal when the stock amount of processed workpieces reaches a predetermined specified amount. A quantity detecting means, workpiece supply order data in which the supply order of each workpiece is determined according to a predetermined standard production ratio, and thinning data for thinning out the supplied workpieces set in this supply order data are stored in advance. and a workpiece information storage means for outputting a work input signal in accordance with the work supply order data when the specified amount detection signal is not outputted from the specified amount detection means, Input work calculation means for thinning out the corresponding workpiece based on the thinning data when the quantity detection signal is outputted, and outputting a workpiece inputting signal based on the supply order data of the thinned out workpiece; A workpiece production ratio control device in a production line, characterized in that the stock amount of processed workpieces in a post-process stock line is automatically adjusted to a value below a specified amount. (2) In the apparatus according to claim (1), the ratio information storage means includes a plurality of rotary cams in which work supply order data is set for each work, and one rotary cam in which thinning data is set. A workpiece production ratio control device in a production line, characterized in that the data set on each rotary cam is outputted using a limit switch provided corresponding to each rotary cam. (3) A workpiece production ratio control device in a production line as set forth in claim (1), wherein the ratio information storage means and the input work calculation means are formed using a programmable controller. (4) In the device according to any one of claims (1) to (3), the input work calculation means may output thinned-out data when the specified amount detection signals are output from all the specified amount detection means. A workpiece production ratio control device in a production line, which outputs a workpiece input signal based only on workpiece supply order data, ignoring the workpiece supply order data. (5) In the apparatus according to any one of claims (1) to (4), the post-process stock line is provided with a plurality of pool over detection means for detecting work pool over, and the input work calculation is performed. A workpiece production ratio control device in a production line, wherein the means stops outputting the workpiece input signal when all of the poolover detection means output the poolover detection signal.