JPH0890356A - Assembly line - Google Patents

Abstract

PURPOSE: To reduce the man-hours of the conveyance and control, and to enable the mixed handling of a number of kinds of printed circuit boards. CONSTITUTION: A line part 22 is provided with synchronizing schedulers 35, 51, an insertion line UI, a soldering line 70, a correcting line UA, a finishing line UF, etc. The synchronizing scheduler 35 is provided with a synchronizing scheduler 36, a storing shelf and a rack master, and receives a rack 85 and a parts box 86 from a receiving station 37, and delivers them to a delivering station 38 corresponding to the insertion process 62. The synchronizing scheduler 51 receives a container 87 and a parts box 88 from receiving stations 53, 54, 55, and delivers them to delivering station 56, 57 corresponding to the correcting process 64 and the finishing process 65. Synchronizing scheduler control personal computers 28, 30 control the reception and delivery of the synchronizing schedulers 35, 51.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly line, and more particularly to an assembly line for assembling various types of printed board units such as transmission devices.

Due to the diversification of customer needs and the like, a large variety of printed board units and a small amount are generally produced.
In an assembly line for assembling a printed board unit, it is necessary to be able to handle a wide variety of printed boards in a mixed manner and to reduce the management man-hours.

[0003]

2. Description of the Related Art FIG. 21 is an explanatory view of a conventional assembly line 220 for manually carrying between steps. In the serving process, the printed board (P
B) is stored in the rack 231 and put in the storage shelf 222. Further, the front end parts taken out from the catering rack 221 are put in the parts box 232 and then put in the storage shelf 222.

The rack 231 and the component box 232 are manually transferred (manually transferred) from the storage shelf 222 to the insertion step 223. In the inserting step 223, an operator inserts a component into the PB and stores the PB in which the component has been inserted into the rack 231. The empty parts box 232 is returned to the serving rack 221.

This rack 231 is a flow soldering machine 22.
5 is manually transported. The PBs soldered one by one by the flow soldering machine 225 are stored in the rack 231 and manually stored in the storage shelf 226.

The rack 231 is manually transported from the storage shelf 226 to the correction step 227. In the correction step 227, the operator performs correction work such as cutting of the component lead of the PB and solder check. The PB that has undergone the correction work is stored in the rack 231 and manually placed in the storage rack 228. Also,
The retrofit parts placed in the parts box 233 are put in the storage rack 228.

The rack 231 and the parts box 233 are manually transported from the storage shelf 228 to the finishing process 229. Finishing process 22
In 9, the worker performs a finishing work to attach the retrofitted parts to the PB. The PB for which finishing work has been completed is stored in the rack 231 and manually placed in the completed shelf 230. Also,
The empty parts box 233 is returned to the serving rack 221.

FIG. 22 is an explanatory view of a conventional assembly line 240 using a conveyor. In the catering process, catering shelves 2
The PB taken out from 21 is stored in the rack 231 and manually transported to the insertion line 261 in the insertion step 242. Further, the pre-attached parts taken out from the serving rack 221 are
It is put in the parts box 232 and manually conveyed to the insertion line 261.

In the insertion line 261, the worker inserts a component into the PB, and the PB whose component has been inserted is conveyed to the conveyor 25.
Listed in 1. The empty rack 231 and the parts box 232 are
It is returned to the serving shelf 221.

The PB is conveyed by the conveyor 251 to the flow soldering machine 252 in the soldering step 243. The width of the conveyor of the flow soldering machine 252 is set in advance on the assembly line 2
It is set according to the width of the PB flowing in 40. After passing through the flow soldering machine 252, P is soldered one by one.
B is conveyed to the correction line 262 of the correction process 244 by the conveyor 253, and the correction line 2 is transferred by the operator.
It is taken into 62.

In the correction step 262, an operator performs a correction work such as cutting the lead of the PB component and checking the solder.
The PB for which the correction work has been completed is placed on the conveyor 253.

When the correction line 262 is full and the PB conveyed to the correction line 262 cannot be taken into the correction line, the operator removes it from the conveyor 253 and stores it in the storage box 234 as PB for the correction amount. To do.
When the correction line 262 becomes vacant, P for the overcorrection
B is input to the correction line 262.

The PB which has been corrected is transferred to the conveyor 25.
3 is conveyed to the finishing line 263 of the finishing process 245, and is taken into the finishing line 263 by the operator.

Also, a finishing line 263 from the catering rack 221.
Then, the parts box 233 containing the retrofit parts is manually carried. In the finishing process 229, the worker performs a finishing work to attach the retrofit parts to the PB. The PB that has completed the finishing work is placed on the conveyor 254 and stored in the PB management storage 264. Further, the empty parts box 233 is returned to the catering rack 221.

When the finishing line 263 is full and the PB conveyed to the finishing line 263 cannot be taken into the finishing line, the operator removes it from the conveyor 253 and stores it in the storage box 235 as PB for the finishing overrun. To do.
When the finishing line 263 is vacant, P for the overfinishing
B is put into the finishing line 263.

[0016]

In the conventional assembly line 220 shown in FIG. 21, although various types of PBs can be handled, the PBs between the steps and the parts to be attached are manually carried, and the timing of the carrying is manually carried out. Need to manage in. For this reason,
There is a problem that the man-hours for transfer and the man-hours for management increase. In addition, there is a problem that the number of work-in-process products stored in the storage rack increases.

In the conventional assembly line 220 shown in FIG. 22, the actual man-hours in each process usually vary considerably from the standard man-hours. Due to this variation in man-hours and the like, if the working time does not match between the processes, a work for removing the overrun PB occurs from the middle of the process as a correction overrun and a finish overrun. As a result, there is a problem that extra man-hours are required for management.

Further, in synchronization with the PB being conveyed to the finishing line 263 via the conveyor 253, the PB is conveyed in the finishing process.
Although it is necessary to supply the retrofit parts to be attached to B in units of a predetermined number, the timing at which the retrofit parts should be supplied varies due to variations in man-hours and the like. Therefore, a person must determine the supply timing and supply the retrofit parts, and there is a problem that extra management man-hours are required.

Further, when PBs having different board widths are flown, it is necessary to temporarily stop the line and reset the width of the conveyor such as the flow soldering machine 252, so that PBs of various types are mixed. There is a problem that you can not handle it.

The present invention has been made in view of the above points, and it is an object of the present invention to provide an assembly line control system capable of reducing the man-hours for transfer and the man-hours for management, and capable of handling various kinds of printed board units in a mixed manner. And

[0021]

According to another aspect of the present invention, there is provided an assembling line, wherein a carrier container for storing a predetermined number of units to be assembled, and a storage rack capable of storing a carrier container for storing a predetermined number of parts are provided. Departure provided with a storage entrance provided with a storage detector that detects the presence or absence of the transport container and a delivery detector that is provided corresponding to the start position of the work line of the next process and that detects the presence or absence of the transport container. A transfer mechanism that transfers the transfer container between the mouth and the storage port, the storage shelf, and the output port, and the transfer mechanism are controlled to store the transfer container through the storage port, and from the storage shelf. And a control unit that causes the transfer container to be output from the output port, and a transfer mechanism that is controlled by the control unit and that stores a predetermined number of units to be assembled, which have been supplied to the input port from the previous process. Provide for the container and the entrance. For a process in which a transport container storing the assembled parts is stored and only the assembly target unit is to be supplied by the transfer mechanism, the transport previously delivered to the delivery port is performed based on the standard man-hour of the assembly target unit. When the container does not stay, the transport container storing the assembly target unit is output to the outlet and the assembly target unit and the parts corresponding to the assembly target unit are supplied to the assembly target unit. Based on the standard man-hours, when the transport container previously delivered to the delivery port is not accumulated, the transport container storing the assembly target unit and the transport container storing the parts corresponding to the assembly target unit are It is configured to have a transport container supply device that synchronously leaves the delivery port.

According to a second aspect of the present invention, the assembly line according to the first aspect includes a step consisting of a plurality of lines, and the control unit of the transfer container supply device is not assigned to each line in the step at the time of storage. Each line in the process at the time of receiving the transport container containing the unit to be assembled so that the difference in the number of work-in-process corresponding to the transport container containing the unit to be assembled is minimized between the lines. In addition, a load management means for allocating the transport container is provided.

According to a third aspect of the present invention, in the assembly line according to the first aspect, the control unit of the transfer container supply device has a number of man-hours for each transfer container that stores the assembly target unit that has been delivered to each line of each process. Is monitored, and if there is a delay for a specified time or longer, an efficiency management means for generating an alarm is provided.

According to a fourth aspect of the present invention, in the assembly line according to the first aspect, the control unit of the transport container supply device has an in-process allowance value for each process and an in-process allowance value for each line in each process. Has been set, and when the number of in-process man-hours corresponding to the transport container storing the assembly target unit that is assigned to each line in the above-mentioned process at the time of receipt exceeds the in-process allowable value, it is added. In-process management means for instructing the work man-hours.

According to the invention of claim 5, in the assembly line according to claim 1, an identification code including information for identifying the size of the transport container and the size of the assembly target unit housed in the transport container is attached. It is equipped with a soldering machine equipped with a conveyor width switching mechanism that switches the conveyor width according to the size of the assembly target unit using the existing transportation container, and a size switching mechanism that switches the size of the applicable transportation container. It is equipped with a unit supply device that takes out the assembly target unit one by one from the transport container and supplies it to the soldering machine, and a size switching mechanism that switches the size of the applicable transport container. It is read by the identification code reader and a conveyor that conveys the stored containers to the unit supply device. Based on the identification code, the size of the transport container and the size of the unit to be assembled are identified, and according to the identification result, the size switching mechanism and the conveyor width switching mechanism are controlled, and the transport conveyor and the unit supply device The soldering line is configured to include a size of the transfer container to be adapted and a soldering line control unit that switches the conveyor width of the soldering machine.

According to a sixth aspect of the present invention, in the assembly line according to the fifth aspect, the soldering line control unit is configured to perform the solder holding time according to the solder holding time specified for the unit to be assembled, which is obtained based on the identification code. The solder holding time of the soldering machine is switched.

According to a seventh aspect of the present invention, in the assembly line according to the fifth aspect, a plurality of the soldering machines are arranged in parallel, and the conveyor is a unit supply device corresponding to each of the soldering machines. The soldering line control unit has a branching unit for transporting the transporting container, and the soldering line control unit, based on the information on the size of the transporting container obtained based on the identification code and the size of the assembly target unit, The unit supply device of the transfer destination is determined, and the branch portion of the transfer conveyor is controlled so that the transfer container is transferred to the determined transfer destination.

According to an eighth aspect of the invention, in the assembly line of the fifth aspect, the worker in charge of transferring the unit to be assembled discharged from the soldering line to the conveyor subsequent to the next step leaves the seat. At this time, a temporary storage device for temporarily storing the assembly target unit discharged from the soldering line is provided near the discharge port of the soldering line.

In the assembly line of the ninth aspect of the invention, when the unit to be assembled is conveyed from the previous process to the next process by the conveyor in the case where there is no manpower in the next process, the supply from the previous process is performed. The assembled unit to be assembled is automatically temporarily stored, and when the man-hours for the next process are available, the stored unit to be assembled is taken out and supplied to the next process. .

According to a tenth aspect of the present invention, in the assembly line according to the ninth aspect, the inter-process managing means includes a unit storage device capable of storing a plurality of units to be assembled, and an upstream and a downstream conveyor before the next process. It is connected and is provided between the branching unit and the unit storage device, and a branching unit that switches between transporting the assembly target unit from the upstream side to the downstream conveyor or the unit storage device side. Unit to be assembled from the unit, to the unit storage device side, and also to transfer the assembly target unit unloaded from the unit storage device to the next process side, and the assembly target unit in the next process If it is judged that there is no room in the number of man-hours in the next process from the stay detector that detects stay and the situation of stay detected by the stay detector, the assembly target unit To store the door to the unit storage device, to control the branching unit and the unit storage device,
When it is determined that the man-hours for the next process can be spared, the branch unit and the storage control unit for controlling the unit storage device are configured to convey the unit to be assembled to the next process.

According to an eleventh aspect of the present invention, in the assembly line according to the ninth aspect, a storage rack capable of storing a transport container storing a predetermined number of parts, and a warehousing detector provided with a warehousing detector for detecting the presence or absence of the transport container. A port, a delivery port provided corresponding to a start position of a work line of a process requiring a retrofit component, and a transfer mechanism for transferring the transport container between the delivery port, the storage shelf, and the delivery port. A control unit that controls the transfer mechanism to store the transport container through the storage port and stores the transport container from the storage shelf to the storage port, and is controlled by the control unit. The transfer mechanism stores a carrier container storing the retrofit parts supplied to the storage port,
For the process where the assembly target unit and the post-assembly parts corresponding to the assembly target unit are to be supplied by the transfer mechanism, the retrofit is performed in synchronization with the supply of the specified number of the assembly target units to the process by the conveyor. A configuration is provided in which the transport container that stores the parts is delivered to the delivery port and is provided to the transport container supply device.

[0032]

According to the first aspect of the present invention, when the working speed between the processes does not match and the unit to be assembled which has completed the previous process cannot be supplied to the next process, it is automatically placed in the carrier container supply device. Can be temporarily stored. For this reason, the administrator does not need to remove the assembly target unit that overflows between processes, and it is possible to significantly reduce the management man-hours.

Further, the unit to be assembled and the parts corresponding thereto can be synchronously supplied to each process by the carrier supply device. Therefore, the administrator does not need to determine the supply timing and supply the parts, and the management man-hour can be significantly reduced.

According to the second aspect of the present invention, the load management means assigns the transfer container accommodating the assembly target unit to each line so that the difference in the number of in-process man-hours between the lines in the process is minimized. Therefore, it is possible to reduce the variation in the load of each line in the process, and it is possible to significantly improve the production efficiency.

According to the third aspect of the present invention, since the efficiency management means is provided, the manager can quickly detect and deal with the line that is delayed due to the occurrence of a failure or the like with a small management man-hour. It is possible to improve the production efficiency.

In the fourth aspect of the present invention, the work-in-process management means can present the additional work man-hours necessary to consume the man-hours exceeding the work-in-process allowable value, so that the manager can easily take countermeasures. It is possible to improve the production efficiency.

According to the invention of claim 5, based on the read identification code, the size of the transfer container adapted to the transfer conveyor and the unit supply device is automatically controlled by the control of the soldering line controller. The width of the conveyor of the soldering machine can be automatically changed according to the size of the unit to be assembled. Therefore, it is possible to mix and assemble units to be assembled of various sizes.

According to the sixth aspect of the present invention, even when a plurality of types of units to be assembled are mixed and flowed, the solder holding time designated for the units to be assembled can be automatically set in the soldering machine. To do.

According to a seventh aspect of the present invention, the size of the transfer container adapted to the transfer conveyor and the unit supply device is switched,
Further, it is possible to determine the conveyance destination so that the frequency of switching the conveyor width of the soldering machine is reduced as much as possible, and it is possible to improve the operating rate of the soldering machine.

According to the eighth aspect of the present invention, when the worker leaves the seat temporarily, it is possible to automatically store the unit to be assembled temporarily outside the line.

According to the ninth aspect of the invention, when there is no extra man-hour in the next process, the assembly target unit supplied from the previous process is automatically temporarily stored, and when the extra man-hour is available in the next process, The unit to be assembled stored is taken out and supplied to the next step. For this reason, the administrator does not need to remove the assembly target unit that overflows between processes, and it is possible to significantly reduce the management man-hours.

According to the eleventh aspect of the present invention, the transport container supply device can supply the assembly target unit and the corresponding post-attached parts in synchronization with the step requiring the post-attached parts. For this reason, it is not necessary for the administrator to determine the supply timing and supply the retrofit parts, and it is possible to significantly reduce the management man-hours.

[0043]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an assembly line 2 of a first embodiment of the present invention.
An overall configuration diagram of 0 is shown. Further, FIG. 2 shows a more detailed configuration diagram of the line unit 22.

The assembly line 20 is composed of a control computer section 21 and a line section 22. The control computer section 21 is
It is composed of a master system 23, a floor control system 24, and a line control unit 25. The line control unit 25 includes a line control system 26, a loading management personal computer 27, a synchronous scheduler control personal computer 28, a conveyor / soldering machine control personal computer 29, and a synchronous scheduler control personal computer 30.

The master system 23 is a man-hour master,
It stores a database of CAD information and the like. The floor control system 24 sends information such as a database from the master system 23 to the line control system 26.
To the line control system 26 before the operation of the assembly line is started. In addition, the information regarding the production record is received from the line control system 26.

The line control system 26 stores and holds information such as a database, and when requested, this information is supplied to the loading management personal computer 27, the synchronization scheduler control personal computer 28, the conveyor / soldering machine control personal computer 29, and the synchronization. It is given to the scheduler control personal computer 30 to receive information such as production results.

Further, the line control system 26 includes a loading management personal computer 27, a synchronization scheduler control personal computer 28,
Various commands such as loading instructions are given to the conveyor / soldering machine control personal computer 29 and the synchronous scheduler control personal computer 30.

The line unit 22 includes a synchronization scheduler 35,
Insertion line UI, conveyor 39, soldering line 70, conveyor 131, synchronization scheduler 51, correction line U
A, a finishing line UF, a conveyor 59 and the like.

The insertion step 62 is composed of a plurality of insertion lines UI, and the soldering step 63 is composed of a soldering line 70. In addition, the correction process 64 includes a plurality of correction lines UA.
The finishing process 65 includes a plurality of finishing lines UF.

In this embodiment, the printed board (unit to be assembled) before the soldering process is stored in the rack 85 (see FIG. 7), and the printed board (PB) after the soldering process is placed in the container 8.
It is stored in 7 and transported between each process. Also, pre-attached parts,
The post-installed parts are placed in the parts boxes 86 and 88, respectively, and transported between the respective processes.

The synchronous schedulers 35 and 51 are devices for temporarily storing the rack 85, the container 87, and the parts boxes 86 and 88, which have been stored from the upstream process, and to be delivered to the next process. The rack 85, the container 87, the component boxes 86, 8
8 will be collectively referred to as a transport container.

3 to 6 show the synchronization schedulers 35, 5
1 shows a schematic diagram of the structure of 1. The synchronization scheduler 51
Has the same structure as the synchronization scheduler 35. Figure 3
Shows a view from above, and FIG. 4 shows a side view from the direction D _{1 of} FIG.

The synchronous schedulers 35 and 51 have Y ₁ , Y
A large number of storage shelves 41 extending in _two directions are provided in two rows with the moving passage 43 interposed therebetween. As shown in FIG. 4, each storage shelf 4
1 comprises an upper stage 41a and a lower stage 41b.

The upper stage 41a and the lower stage 41b of the storage rack 41 are
A transport container can be stored in each.

The synchronous scheduler 35 is provided with a storage station 37 (storage port) for storing transfer containers and a storage station 38 (storage port) for storing transfer containers. Similarly, the synchronous scheduler 51 stores the storage containers 53, 54, 55 for storing the transfer containers,
Departure stations 56 and 57 for delivering the transport containers
It has.

Here, the case of the synchronous scheduler 35 will be described. A rack master 44 (transfer mechanism) for taking in a transport container placed in the receiving station 37, storing it in a predetermined empty shelf 41, taking out the transport container from the shelf 41, and delivering it to a predetermined shipping station 38. ) Is provided. The rack master 44 has a moving passage 4
3 can be moved, the shelf 41 and the receiving station 37,
The transfer container is transferred to and from the delivery station 38.

The receiving station 37 and the leaving station 38 have the same structure. Here, the receiving station 37 will be described. The storage station 37 is provided with a conveyor 45 protruding in the side direction (X ₁ , X ₂ direction). At the back of the conveyor 45, a back side end portion 45b having a hollow portion 47 is provided.

The outer end portion 45 of the conveyor 45 for storing goods
The transport container placed on a is moved to the rear end 45b by the conveyor 45 driven by the motor 106. After that, the rack master 44 holds and raises the transport container from below the hollowed-out portion 47 (Z ₂ direction) of the rear end portion 45b, and transfers the transport container to the destination storage rack 41.

When the transport container is to be delivered to the delivery station 38, the rack master 44 takes out the transport container from the storage shelf 41, and the rear end portion 45 of the delivery station 38.
It is transferred to b and placed on the roller at the rear end 45b.
Thereafter, the transport container is moved by the conveyor 45 to the outer end portion 4
It is moved to 5a and unloaded.

FIG. 5 shows the receiving station 37 (53, 5).
4, 55) are explanatory views. Barcode reader (BCR) 9 near the conveyor 45 of the receiving station 37
1 (incoming detector) is provided. As will be described later, a different barcode is attached to each of the transport containers. The BCR 49 reads the barcode of the transport container while the transport container (the rack 85 and the container 87 in FIG. 5) placed on the outer end 45a of the conveyor 45 moves to the rear end 45b.

FIG. 6 shows the delivery station 38 (56, 5).
The explanatory view of 7) is shown. A container sensor 107 (a shipping detector) for detecting the presence or absence of a transport container is provided near the outer end 45a of the conveyor 45 of the shipping station 38. Further, a signal tower 49 is provided to notify an abnormality by using a lamp, a buzzer or the like.

When the transport container (the rack 85 and the container 87 in FIG. 6) placed on the rear end 45b of the conveyor 45 by the rack master 44 is moved to the outer end 45a by the conveyor 45 for the delivery, the container is moved. Sensor 107
Thus, it is detected that the transport container has been delivered to the outer end portion 45a.

The synchronous schedulers 35 and 51 respectively control the synchronous master control panel 3 for controlling the rack master 44.
It is equipped with 6,52.

The synchronous scheduler 35 and the synchronous scheduler control personal computer 28 constitute a carrier container supplying device, and the synchronous scheduler control personal computer 28 and the synchronous scheduler control panel 36 constitute a controller of the carrier container supplying device.

Similarly, the synchronous scheduler 51 and the synchronous scheduler control personal computer 30 constitute a carrier container supplying device, and the synchronous scheduler control personal computer 30 and the synchronous scheduler control board 52 constitute a controller of the carrier container supplying device.

In the synchronous scheduler control personal computer 28,
The detection signal of the BCR 91 of the loading station 37 and the detection signal of the container sensor 107 of the loading station 38 are supplied. The synchronous scheduler control personal computer 30 has BCRs 95, 96, 97 of the receiving stations 53, 54, 55.
And the detection signals of the container sensors 107 of the delivery stations 56 and 57 are supplied.

The synchronous scheduler control personal computer 28 is
Using the detection signal of the CR 91 and the detection signal of the container sensor 107 of the delivery station 38, the synchronous scheduler control board 36 is instructed to enter and leave, and the rack master 44 performs the entry and exit.

Similarly, the synchronization scheduler control personal computer 3
0 uses the detection signals of the BCRs 95 to 97 and the detection signals of the container sensors 107 of the delivery stations 56 and 57 to give an instruction for loading and unloading to the synchronous scheduler control panel 52 to cause the rack master 44 to perform loading and unloading.

FIG. 8 shows the insertion line UI of the insertion step 62.
9 shows an explanatory view of the relationship between the synchronization scheduler 35 and FIG.
Shows an explanatory diagram of the relationship between the correction line UI of the correction process 64, the finishing line UF of the finishing process 65, and the synchronization scheduler 51.

In the example of FIGS. 8 and 9, the insertion step 62 includes
Three insertion lines UI _{1 to} UI ₃ are provided, and
The correction process 64 is provided with _four correction lines UA _{1 to} UA ₄ , and the finishing process 65 is provided with five finishing lines UF.
_{1 to} UF ₅ are provided.

The synchronous scheduler 35 is provided with a delivery station 38 corresponding to the start positions of the insertion lines UI _{1 to} UI ₃ . Further, a conveyor 39 is provided for transporting the rack 85 containing the PB after the insertion work to the next step (soldering step 63).

In the synchronous scheduler 51, the start positions and end positions of the correction lines UA _{1 to} UA ₄ are respectively associated with
A shipping station 56 and a shipping station 55 are provided. A delivery station 57 is provided corresponding to the starting position of each finishing line UF _{1 to} UF ₅ . Also,
A conveyor 59 is provided for transporting the container 87 containing the finished PB to the next step (test step).

Next, the operation of the assembly line 20 will be described.

[Category Distributing Process] In each line of each process, the number of personnel instructed by the input management control personal computer 27 is arranged in advance.

The rack 85, the container 87, the component box 86 for storing the pre-attached parts, and the component box 88 for storing the post-attached parts include a bar code (container type, container type) for identifying each transport container. (Including information such as number and container size) is attached. Further, a unit drawing number indicating the type of PB unit is attached as a bar code to each PB.

The racks 85 to be used at the time of serving
Relationship between container 87 and PB stored in it, rack 8
A registration operation for associating the relationship between 5 and the parts box 86 and the relationship between the container 87 and the parts box 88 is performed using the loading management control personal computer 27.

In the registration work, the input management control personal computer 27
Rack 8 to be associated with the barcode reader connected to
The bar code of 5 and the bar code of the container 87 and the bar code of the PB to be stored (bar code of the unit drawing number) are read, and the rack 85 and the container 87 are associated with the PB to be stored.

Similarly, by reading the bar code, the rack 85 and the parts box 86 are associated with each other, and the container 8
7 is associated with the parts box 88.

In this way, the rack 85, the container 87,
Information in which the unit drawing number and the relationship between the component boxes 86 and 88 are associated with each other is supplied to the line control system 26 via the input management personal computer 27 and stored therein.

The PB taken out from the serving rack 60 is stored in the associated rack 85, and the attached parts to be inserted into the PB are stored in the parts box 86 associated with the unit drawing number of the PB. .

The synchronous scheduler control personal computer 28 displays a loading instruction for loading the rack 85 and the component box 86 on the display or the like. The input instruction is issued a predetermined time, for example, half a day before the time to be supplied to the insertion step 62. In accordance with this loading instruction, the worker stores the rack 85 containing the PB and the component box 86 containing the components in the synchronous scheduler 35.

At the time of warehousing, the rack 85 and the parts box 86 are placed on the outer end 45a of the warehousing station 37. Rack 8
5 or the component box 86 is moved to the rear end 45b, the barcode is read by the barcode reader 91,
It is input to the synchronization scheduler control personal computer 28. When the barcode is read, the synchronous scheduler control personal computer 28 gives a storage instruction to the synchronous scheduler control panel 36. Synchronized scheduler control panel 36 in response to receiving instruction
Controls the rack master 44 to enter the receiving station 3
The rack 85 or the parts box 86 is taken in from 7 and stored in the designated shelf 41.

Further, the retrofit parts to be attached to the PB after the correction work are taken out from the distribution rack 60 and stored in the parts box 88 associated with the unit drawing number of the PB.

The synchronous scheduler control personal computer 30 for controlling the synchronous scheduler 51 displays a loading instruction for instructing the storage of the parts box 88 on the display or the like. The input instruction is issued a predetermined time, for example, half a day before the time to be supplied to the finishing process 65. According to this input instruction, the worker stores the parts box 88 storing the retrofitted parts in the synchronous scheduler 51.

Similar to the receipt in the synchronous scheduler 35,
When the parts box 88 is loaded, the barcode is read by the barcode reader 95 of the loading station 53 and input to the synchronous scheduler control personal computer 30. When the barcode is read, the synchronous scheduler control personal computer 30 gives a storage instruction to the synchronous scheduler control panel 52. In response to the receipt instruction, the synchronous scheduler control panel 52
Controls the rack master 44 to enter the receiving station 5
The component box 88 is taken in from 3 and stored in the designated shelf 41.

[Insertion Step] The synchronous scheduler control personal computer 28 gives a delivery instruction to the synchronous scheduler control board 36 in order to supply the rack 85 and the parts box 86 to the respective insertion lines UI _{1 to} UI ₃ . In response to the delivery instruction, the synchronous scheduler control board 36 controls the rack master 44,
The specified rack 85 or the parts box 86 is taken out from the storage rack 41 and is transported to the specified delivery station 38.

The worker operates the corresponding exit station 38.
Rack 85 and parts box 8 that have been delivered to the outer end 45a of the
6 is taken into the start positions of the insertion lines UI _{1 to} UI ₃ .

The synchronous scheduler 35 successively delivers the rack 85 and the parts box 86 associated with the rack 85 to the delivery station 38. Therefore, PB and this PB
Insert line UI that synchronizes the parts to be inserted into ₁
~ UI ₃ can be supplied.

Normally, the synchronization scheduler 35, under the control of the synchronization scheduler control personal computer 28, carries out the parts box 86 corresponding to the rack 85 at a timing based on the standard man-hours of each rack 85. The standard man-hour of each rack 85 is determined by the standard man-hour set in the unit drawing number of the housed PB and the housed PB number.

When the actual man-hours in the insertion lines UI _{1 to} UI ₃ become longer than the standard man-hours, when the next rack 85 is to be unloaded at the timing based on the standard man-hours, the rack 85 or the parts box 86 previously unloaded is used. However, there may be a case where they are staying at the delivery station 38.

In this case, while the container sensor 107 detects that the rack 85 or the parts box 86 is in the delivery station 38, the synchronous scheduler control personal computer 28 does not give a delivery instruction to the synchronous scheduler control panel 36. . As a result, the rack 85 and the component box 86 to be delivered next are stored in the synchronous scheduler 35 until the rack 85 and the component box 86 are not accumulated at the delivery station 38.

Therefore, the administrator inserts the insertion lines UI ₁ ...
To monitor the progress of the work in the UI _3, the rack 85 and the component box 86 is not necessary to determine the timing of supplying, automatically, at the optimum timing, the rack 85 and the parts box 86 an insertion line UI ₁ ~ Can be supplied to UI ₃ . Therefore, the required management man-hours can be significantly reduced.

The synchronization scheduler control personal computer 28
As will be described later, each insert line UI ₁ ~U at goods receipt
Steps of the rack 85 is not yet issuing assigned to I ₃ of (WIP steps), such that the difference between the respective insertion line UI ₁ ~UI ₃ is reduced, the insertion line UI ₁ rack 85 which is receipts controlling the assignment to ~UI _3.

In each of the insertion UI _{1 to} UI ₃ , the operator selects PB
The component is inserted into the rack, and the PB in which the component has been inserted is returned to the original rack 85. The emptied parts box 86 is returned to the serving rack 60.

The rack 85 containing the PB in which the parts have been inserted is placed on the conveyor 39 and conveyed to the soldering step 63.

[Soldering Step 63] The soldering line control unit for controlling the soldering line 70 is composed of a conveyor / soldering machine control personal computer 29, a conveyor control board 71, and a soldering machine control board 73.

BCR provided at the entrance of the soldering line 70
The bar code of the rack 85 is read by 92.
This barcode information is input to the conveyor / soldering machine control personal computer 29. The conveyor / soldering machine control personal computer 29 judges the width of the rack 85 and the width of the PB accommodated in the rack 85 based on the inputted bar code information, and switches the conveyor width, etc., on the conveyor control panel. 71, the soldering machine control panel 73 can be instructed.

Under the control of the conveyor / soldering machine control personal computer 29, the conveyor control board 71 switches the size of the transfer conveyor 75 adapted to the width of the rack 85, and the flow soldering machine 7
Controlling the 2 _1, 72 ₂ to either the branch or the like.

The soldering machine control board 73 is controlled by the conveyor / soldering machine control personal computer 29, and the flow soldering machine 7 is operated.
It controls switching of the conveyor width corresponding to the PB width of 2 ₁ and 72 ₂ , switching of solder holding time, and the like.

The rack 85 is moved by the conveyor 75.
Flow soldering machine 72₁, 72₂Substrate supply device in front of
74₁, 74₂(See FIG. 14). Substrate
Feeder 74₁, 74₂(Unit supply device) is a rack
PB is taken out one by one from 85, and the board width switching conveyor
83₁, 83₂Flow soldering machine 72 through₁, 72 ₂
Supply to. Flow soldering machine 72₁, 72₂Soldering in
The processed PB is stored in the buffer station 110.
Be transported. The buffer station 110 will be described later.
As described above, when the worker leaves the seat, the temporary PB is
It is a device for checking.

The PB transported to the buffer station 110 is put into an empty container 87 by an operator and placed on the conveyor 131. As described above, the container 87 is associated with the rack 85 in which the PB was stored by registering the barcode. Conveyor 1
The container 87 placed on 31 is the synchronization scheduler 5
It is transported to the first storage station 54.

Details of the soldering line 70 and the buffer station 110 will be described later.

[Correction Step] The container 87 conveyed by the conveyor 131 to the entrance of the receiving station 54 is
It is placed on the outer end portion 45 a of the receiving station 54 by the conveyor 131. When the container 87 moves to the rear end portion 45b of the receiving station 54, the barcode is read by the barcode reader 96 and input to the synchronous scheduler control personal computer 30.

When the barcode is read by the barcode reader 96, the synchronous scheduler control personal computer 30 gives a receipt instruction to the synchronous scheduler control panel 52. In response to the storage instruction, the synchronous scheduler control board 52 controls the rack master 44 to take in the container 87 from the storage station 54 and store it in the instructed storage shelf 41.

The synchronous scheduler control personal computer 30 gives a delivery instruction to the synchronous scheduler control board 52 in order to supply the containers 87 to the respective correction lines UA _{1 to} UA ₄ . In response to the delivery instruction, the synchronous scheduler control panel 52
Controls the rack master 44 to take out the designated container 87 from the storage rack 41 and convey it to the designated shipping station 56.

The worker operates the corresponding exit station 56.
The container 87 discharged to the outer end portion 45a of the above is taken into the start positions of the correction lines UA _{1 to} UA ₄ .

Normally, the synchronization scheduler 51 controls each container 87 under the control of the synchronization scheduler control personal computer 30.
The stocked container 87 is unloaded at a timing based on the standard man-hours. The standard man-hour of each container 87 is determined by the standard correction man-hour set in the unit drawing number of the housed PB and the housed PB number.

When the actual man-hours in the correction lines UA _{1 to} UA ₄ become longer than the standard man-hours, when the next container 87 is to be unloaded at the timing based on the standard man-hours, the container 87 previously unloaded is the exit station. The case of staying at 56 occurs.

In such a case, when the container sensor 107 of the shipping station detects that there is one container 87 at the shipping station 56, the synchronous scheduler 51 moves the next container 87 to the rear end 45b. You can leave until.

Further, the container 87 is the exit station 5
When it is detected that there are two in 6, the synchronous scheduler control personal computer 30 does not give a delivery instruction to the synchronous scheduler control board 52. As a result, the container 87 to be next delivered is automatically stored in the synchronous scheduler 51 until the container 87 is no longer retained at the delivery station 56.

The working speed up to the soldering step 63 is
If it is faster than the standard, by adjusting the storage time of the container 87 in the synchronous scheduler 51 to be long,
For the correction lines UA _{1 to} UA _{4 in the} correction process 64,
The container 87 can be supplied at a timing based on standard man-hours.

As described above, when the work speed up to the soldering step 63 and the work speed in the correction step 64 do not match, the container 87 that cannot be supplied to the correction step 64 is automatically
It can be stored in the temporary synchronization scheduler 51.
Therefore, unlike the conventional assembly line, the administrator does not need to remove the PB overflowing between the steps, and the management man-hour can be significantly reduced.

The synchronization scheduler control personal computer 30
As will be described later, is assigned to at goods receipt from receipts station 54 to each repair line UA ₁ ~UA _4, the number of steps of the container 87 is not yet unloading (WIP steps), each modified line UA ₁ ~UA ₄ The correction lines UA ₁ -U of the containers 87 that have been stored so that the difference between them is minimized.
Control allocation to A ₄ .

On each of the correction lines UA _{1 to} UA ₄ , the operator performs a correction work such as cutting the lead of the PB component and checking the solder. The PB for which the correction work has been completed is stored in the original container 87, and the outer end portion 4 of the receiving station 55 is stored.
5a.

[Finishing Step] When the container 87 placed on the outer end portion 45a of the receiving station 55 moves to the rear end portion 45b of the receiving station 55, the barcode is read by the barcode reader 97 and synchronized. It is input to the scheduler control personal computer 30.

When the barcode is read by the barcode reader 97, the synchronous scheduler control personal computer 30 gives an instruction to the synchronous scheduler control panel 52 to store. In response to the storage instruction, the synchronous scheduler control board 52 controls the rack master 44, takes in the container 87 from the storage station 55, and stores it in the instructed shelf 41.

The synchronous scheduler control personal computer 30 supplies the finishing schedulers UF _{1 to} UF ₅ with the parts boxes 88 corresponding to the containers 87 in order to supply the finishing lines UF _{1 to} UF 5.
Give 2 to leave. In response to the delivery instruction, the synchronous scheduler control board 52 controls the rack master 44 to take out the designated container 87 and the parts box 88 from the shelf 41 and convey them to the designated delivery station 57.

The worker uses the corresponding exit station 57.
Container 87 is issuing to the outer end 45a, a component box 88 accommodating a part mounted after finishing line UF ₁ ~UF ₅
Capture at the start position of.

The synchronous scheduler 51 successively delivers the container 87 and the parts box 88 associated with the container 87 to the delivery station 57. Therefore, PB and this P
The retrofit parts attached to B can be supplied to the finishing lines UF _{1 to} UF ₅ in perfect synchronization.

Normally, the synchronization scheduler 51 controls each container 87 under the control of the synchronization scheduler control personal computer 30.
The received container 87 and the parts box 88 are delivered to the delivery station 57 at a timing based on the standard man-hours. The standard man-hour of each container 87 is determined by the standard finishing man-hour set in the unit drawing number of the housed PB and the housed PB number.

When the actual man-hours on the finishing lines UF _{1 to} UF ₅ become longer than the standard man-hours, when the next container 87 and the parts box 88 are to be unloaded at the timing based on the standard man-hours, the container 87 previously unloaded is used. Or the parts box 88 is
There may be a case of staying at the delivery station 57.

In such a case, when the container sensor 107 of the shipping station detects that there is one container 87 at the shipping station 57, the synchronous scheduler 51 moves the next container 87 to the rear end 45b. You can leave until.

Further, the container 87 is the exit station 5
If it is detected that there are two in 7, the synchronous scheduler control personal computer 30 does not give a delivery instruction to the synchronous scheduler control board 52. As a result, the container 87 to be delivered next is automatically stored in the synchronous scheduler 51 until the container 87 at the delivery station 57 is no longer retained.

If the work speed up to the correction step 64 is faster than the standard, the storage time of the container 87 in the synchronous scheduler 51 is adjusted to be longer, so that the finishing lines UF ₁ to The container 87 can be supplied to the UF _{5 at} a timing based on standard man-hours.

As described above, when the work speed up to the correction process 64 does not match the work speed in the finishing process 65, the container 87 that cannot be supplied to the finishing process 65 is automatically stored in the temporary synchronization scheduler 51. can do. Therefore, unlike the conventional assembly line, the administrator does not need to remove the PB overflowing between the steps, and the management man-hour can be significantly reduced.

The container 87 is supplied to the finishing process 65.
Even if the timing is off the standard timing, the same
The term scheduler 51 associates the container 87 with this.
The parts box 88 that is already in place, and then the delivery station 5
Issue to 7. Therefore, after mounting on PB and this PB
Finishing line UF in perfect synchronization with attached parts₁~ UF _Five
Can be supplied to.

Therefore, unlike the conventional assembly line, it is not necessary for the worker to judge the supply timing and supply the retrofitted parts to the finishing process, and the man-hours for management can be greatly reduced.

The synchronization scheduler control personal computer 30
As will be described later, is assigned to each finishing line UF ₁ ~UF ₅ at goods receipt from receipts station 55, which is a non-unloading container 87 man-hours (in-process steps), each finishing line UF ₁ ~UF ₅ The finishing lines UF _{1 to} U of the loaded containers 87 are reduced so that the difference between them becomes small.
Controls allocation to F ₅ .

In each of the finishing lines UF _{1 to} UF ₅ , the worker carries out finishing work to attach the retrofit parts to the PB. After finishing the work, the assembled PB is the original container 8
It is housed in 7 and placed on the conveyor 59. The container 87 is conveyed to the test line by the conveyor 59. The emptied parts box 88 is returned to the serving rack 60.

Next, the individual function in each step will be described.

[Category work] The setting of the number of staff in the catering work will be described. FIG. 10 is an explanatory diagram of the setting function of the staff member by the input management control personal computer 27.
The standard man-hours for insertion, correction and finishing are set in the unit drawing number of each PB. This standard man-hour information is stored in the line control system 26 as a database. Input management control personal computer 27, from the unit diagram number,
This database can be searched for standard man-hours.

The worker inputs in advance the unit drawing number and the planned number of units to be worked on that day. In the example of FIG. 10, the unit drawing numbers H16B-XXX-XXX ... H16B-XXX-nnn and the respective planned supply numbers are input. When a work day and personnel setting command are input, the throwing-in control personal computer 27 calculates the planned man-hours in each process of insertion, correction and finishing, and the required number, and displays them on the display. In the example of FIG. 10, the number of personnel required for each process of insertion, correction, and finishing is 11
People, 22 and 21 are displayed. In addition, the standard holding personnel in each process and the instruction of the movement of the personnel from other processes to the process short of the standard holding personnel on the day are also standardized. In the example of FIG. 10, an instruction to move two people or one person from the insertion process to the correction process and the finishing process is displayed with a triangle mark.

[Load Management Function for Each Line in Each Process] The synchronous scheduler control personal computers 28, 30 store the racks 85 in the synchronous schedulers 35, 51 before the inserting process 62, the correcting process 64, and the finishing process 65, respectively. , The container 87 is assigned to a plurality of lines in the process.
At the time of this allocation, the difference between the loads of the lines in the process is minimized.

In each of the insertion lines UI _{1 to} UI ₃ , the man-hours (work-in-progress man-hours) of the rack 85 assigned by the synchronous scheduler control personal computer 28 and not yet delivered are generated. The synchronization scheduler control personal computer 28
The allocation of the racks 85 loaded from the loading station 37 to the insertion lines UI ₁ to UI ₃ is controlled so that the difference in the number of in-process man-hours among the insertion lines UI _{1 to} UI ₃ is minimized.

Each correction line AI₁~ UA_FourThe sync
Already assigned by the kejuula control personal computer 30
Man-hours of container 87 that has not been issued (work-in-process)
Is occurring. Synchronous scheduler control personal computer 30
Is the correction line AI₁~ UA _FourIn between,
Receiving from the receiving station 54 so that the difference is minimized
Each modified line AI of the created container 87₁~ UA_FourTo
Control allocation.

Finishing line UF₁~ UF_FiveThe sync
Already assigned by the kejuula control personal computer 30
Man-hours of container 87 that has not been issued (work-in-process)
Is occurring. Synchronous scheduler control personal computer 30
Is each finishing line UF₁~ UF _FiveIn between,
Receive from the receiving station 55 to minimize the difference.
Finishing line UF of the finished container 87₁~ UF_FiveTo
Control allocation.

Here, the case of the correction lines UA _{1 to} UA ₄ will be described in detail. Insertion line UI ₁
The same applies to UI ₃ to finishing lines UF _{1 to} UF ₅ .

FIG. 11 is an explanatory view of the allocation of man-hours of the container 87 to the correction lines UA ₁ to UA ₄ . Each of the loaded containers 87 stores a specified number of PBs of any unit drawing number. Correction line UA _1- UA
By assigning a plurality of containers 87 to each of the _four , the correction man-hours of the unit drawing numbers corresponding to the plurality of containers 87 are assigned.

In FIG. 11A, the correction man-hours (work-in-progress man-hours) of the unit drawing numbers corresponding to the containers 87 that have been assigned but have not yet been delivered are represented by the respective correction lines UA _{1 to} UA.
It shows every _four .

In the correction line UA ₁ , the correction man-hours (work-in-progress man-hours) allocated in the order of unit drawing numbers c and h by the allocation of the container 87 remain. In the synchronous scheduler 51, containers 87 corresponding to the unit drawing numbers c and h are stored in a waiting state for delivery to the correction line UA ₁ .

Similarly, in each of the correction lines UA _{2 to} UA ₄ , the correction man-hours (work-in-process man-hours) of the unit drawing numbers e and j, the unit drawing numbers g and f, and the unit drawing numbers k and d remain. In the synchronous scheduler 51, containers 87 corresponding to respective unit drawing numbers are stored in a waiting state for delivery to the correction lines UA ₂ to UA ₄ .

In the above allocation state, the correction line UA
The number of in-process steps for ₄ is the smallest. Here, when the container 87 in which the PB of the unit drawing number m is stored is newly stored from the receiving station 54 and the correction man-hour of the drawing number m occurs, the synchronous scheduler control personal computer 30 determines that the number of work-in-process is This container 87 is assigned to the least modified line UA ₄ . As a result, in FIG.
As shown by the broken line, the correction man-hour of the unit drawing number m is newly assigned to the correction line UA ₄ .

Further, as shown in FIG. 11B, when the in-process man-hour of the correction line UA ₄ is 0, the newly loaded container 87 is directly moved to the correction line UA _4.
Issue to.

As described above, each correction line UA _{2 is} controlled by the load management function of the synchronous scheduler control personal computer 30.
~ Container 87 so that the load difference of UA ₄ is minimized
Can be assigned (thus, correction man-hours can be assigned). Similarly, the synchronization scheduler control personal computer 28
Each load line UI _{1 to} UI
_The racks 85 (and therefore the insertion man-hours) can be assigned so that the load difference of ₃ is minimized. Similarly, the load management function of the synchronous scheduler control personal computer 30 can assign the containers 87 (and thus assign the finishing man-hours) so that the load difference between the finishing lines UF _{1 to} UF ₅ is minimized. .
With this load management function, it is possible to minimize the load variation among the lines in each process and improve the production efficiency.

[Efficiency Management Function for Each Line in Each Process] The synchronous scheduler personal computer 28 uses the standard man-hours to determine the working time of the rack 85 delivered to the delivery station 38 corresponding to each insertion line UI _{1 to} UI _3. If the delay is observed and the standard man-hours are exceeded, the lamp and buzzer of the signal tower 49 notify the administrator of the occurrence of the delay.

Similarly, the synchronization scheduler personal computer 30
On the basis of the standard man-hours, monitors the working time of the container 87 discharged to the shipping station 56 corresponding to each correction line UA _{1 to} UA _4, and when there is a delay from the standard man-hours, the signal tower 49 Notify the administrator of the occurrence of delays with a lamp and buzzer.

Similarly, the synchronization scheduler personal computer 30
On the basis of the standard man-hours, monitors the working time of the container 87 discharged to the shipping station 57 corresponding to each of the finishing lines UF _{1 to} UF _5, and when there is a delay from the standard man-hours, the signal tower 49 Notify the administrator of the occurrence of delays with a lamp and buzzer.

Here, the correction lines UA ₁ to
As will be described in the case of UA ₄ , insertion lines UI _{1 to} U
The same applies to I ₃ and finishing lines UF _{1 to} UF ₅ .

FIG. 12 is an explanatory view of the timing of the container 87 leaving the correction line UA ₁ and the notification of the delay.

Here, the containers 87 having the same standard man-hours (2 hours) are replaced with the containers 87a, 87b, 87c, 87.
It is assumed that the goods are delivered to the delivery station 56 in the order of d. The first container 87a is the first container 87 to be delivered from the state where there is no container 87 at the delivery station 56 corresponding to the correction line UA ₁ . When only one container 87 is delivered to the delivery station 56, the container 87 is delivered to the outer end 45a of the delivery station as shown in the delivery station 56 on the X ₁ side in FIG.

The synchronization scheduler control personal computer 30 sends the container 87a to the synchronization scheduler 51 at time t.
At = 0, the goods are issued to the goods issue station 56. The discharged container 87a is immediately taken into the correction line UA ₁ and the work is started. The container 87
Whether it has been taken into the correction line UA ₁ can be detected by the container sensor 107.

The synchronous scheduler control personal computer 30 counts the time from the time of leaving at the shipping station 56 at time t = 0, and at time t = 1 when half of the standard man-hour has elapsed.
At H, the next container 87b is unloaded, and at time t = 2H when the standard man-hour has elapsed, the next container 87c is unloaded.

At time t = 2H, if the work of the container 87a is completed in accordance with the standard man-hours, the container 87b that has been put out first is immediately corrected to the correction line UA.
_It is taken into ₁ and work is started. Therefore, immediately after the time t = 2H, the number of the containers 87 that have been unloaded at the shipping station 56 is only one of the containers 87c.

At time t = 2H, when the working time of the container 87a is behind the standard man-hour, the next container 87b is not taken into the correction line UA ₁ until the work of the container 87a is completed. Therefore, until the work of the container 87a is completed, the exit station 5
Two containers 87, that is, a container 87b and a container 87c, are unloaded in the container 6.

Two containers 8 at the delivery station 56
7 has been unloaded, as shown in the shipping station 56 on the X ₂ side in FIG.
The container 87 is unloaded at 5a and the rear end portion 45b.

At the time t = 2H, if the working time of the container 87a is behind the standard man-hour,
Outer end 45a and rear end 45 of the shipping station 56
The container 87b and the container 87c are put out in each of b.

When the synchronization scheduler control personal computer 30 detects that the container 87b has not yet been taken into the correction line UA ₁ by the time when the reference time t _{D has} elapsed from the time t = 2H, the signal tower is detected. The lamp of 49 is turned on and the buzzer is sounded to notify the administrator of the work delay on the correction line UA ₁ .

The synchronous scheduler control personal computer 30 leaves the container 87c at the time t = 2H and then the next container 87d at the time t = 3H based on the standard man-hours.

If the synchronization scheduler control personal computer 30 detects that the container sensor 107 has not been taken in by the correction line UA ₁ at the time when the reference time t _{D has} elapsed from the time t = 4H, the signal tower is detected. The lamp of 49 is turned on and the buzzer is sounded to notify the administrator of the work delay on the correction line UA ₁ .

In the same manner, the synchronous scheduler control personal computer 30 thereafter monitors the work time of each container 87, and when the standard man-hour is delayed by the reference time t _D or more, notifies the work delay.

In this way, when a delay occurs with respect to the standard man-hour on any line, the synchronization schedulers 35, 5
The lamp 1 of the signal tower 49 lights up and the line where the delay occurs due to the ringing of the buzzer is notified. For this reason,
The administrator does not need to regularly check the work status of each line, and only when the signal tower 49 gives a notification of delay, it is sufficient to check the notified line and take action, greatly increasing the management man-hours. Can be reduced. In addition, work delays can be dealt with promptly, and production efficiency can be improved.

[Work-in-process management for each process and each line]
FIG. 13 is an explanatory diagram of the in-process allowance value. FIG.
In (A), the vertical axis represents the man-hours (work-in-progress man-hours) of the racks 85 and the containers 87 that have been stored in the synchronous schedulers 35 and 51, assigned to each line, and not yet delivered in each process.

The synchronization scheduler personal computers 28 and 30 are
As shown by the in-process allowance line in the example of FIG. 13A, the in-process allowance value is set for each process, and the in-process allowance value is set for each line in each process. .

In the example of FIG. 13A, the in-process man-hours of the correction process 64 and the finishing process 65 exceed the in-process allowable value.

FIG. 13B shows each of the lines UA ₁ -U in the correction process 64 in which the in-process allowable value of FIG. 13A is exceeded.
Indicating the status of the work-in-process man-hours of A _4. In FIG. 13 (B),
It indicates that the correction lines UA ₂ and UA ₄ exceed the set in-process allowable value.

The synchronization scheduler personal computers 28 and 30 are
As shown in FIGS. 13 (A) and 13 (B), the status of the in-process man-hours for each process and each line is displayed on the display. In addition, when the number of in-process man-hours exceeds the in-process allowable value, additional work time (for example, overtime hours) necessary to eliminate the amount exceeding the allowable value is displayed on the display and the number of employees is increased. Display the required number of additional personnel.

The administrator is the synchronization scheduler personal computer 2
According to the display of 8 and 30, it is possible to easily manage the in-process time.

[Each Function in Soldering Line 70] FIG. 1
4 shows a plan view of the soldering line 70. The soldering line 70 can handle both a normal size (M size) rack 85 _M and a large size (L size) rack 85 _L in a mixed manner. The M size rack 85 _M has a width W, for example.
_R x depth D _R x height H _R (see Fig. 7) is 316 x 3
The width of the PB dimension to be stored is 55 × 580 mm.
It is set to 55 to 250 mm. Also, L size rack 85
_L is, for example, width W _R × depth D _R × height H _R is 40
The width of the PB dimension to be stored is 250 to 330 mm with respect to 0 × 460 × 568 mm.

As described above, in the serving process, the rack 85 is used.
Bar code (identification code) and the PB bar code to be stored are read by the bar code reader and input to the loading management control personal computer 27 to associate the rack 85 with the PB to be stored.

FIG. 15 shows an example of the correspondence between the rack 85 and the PB to be stored. The rack identification number is recorded in the bar code of the rack 85, and the unit drawing number of the PB is recorded in the PB bar code. The symbol M at the beginning of the rack identification number indicates a normal size (M size) rack 85 _M , and the symbol L at the beginning indicates a large size (L size) rack 85 _L.

In the example of FIG. 15, the rack identification number MRK0
001 M size rack 85 _M , unit drawing number H16
It shows that the PB of B-1001-001 is stored. In addition, in the M size rack 85 _L with the rack identification number LRK0110, the unit drawing number H16B-3030-01
Indicates that 0 PB is stored.

In the line control system 26, information on the PB width and solder holding time corresponding to the unit drawing number is stored in advance as a database. When the information on the association between the rack 85 and the PB is supplied from the input management control personal computer 27, the line control system 26 causes the rack 8 to operate.
Information for associating the unit drawing numbers of 5 and PB, the PB width, and the solder holding time is generated and held as a file.

FIG. 16 shows an example of information in which the unit drawing numbers of the rack 85 and PB, the PB width, and the solder holding time are associated with each other. In the example of FIG. 16, the PB width is 230 mm, the type of the solder holding time is 1 (for example, 4 to 5 seconds), the PB of the unit drawing number H16B-1001-001, and the M size rack 85 _M of the rack identification number MRK0001. Correspond. Further, a unit diagram number H16B- having a PB width of 294 mm and a solder holding time type of 2 (for example, 3 to 4 seconds)
3030-010 PB and rack identification number LRK01
It corresponds to 10 L size racks 85 _L.

The rack 85 conveyed from the conveyor 39 of the synchronous scheduler 35 is loaded into the substrate supply devices 74 ₁ and 74 _2.
The transfer conveyor 75 that transfers to the
The conveyor 77 connected to the conveyor 39 of _No. 5, the input branching section 78, the conveyors 79 and 80, and the branching sections 81 ₁ and 81
₂ and buffer conveyors 82 ₁ and 82 ₂ .

The buffer conveyors 82 ₁ and 82 ₂ and the substrate supply devices 74 ₁ and 74 ₂ are provided with size switching mechanisms 102 and 103 for switching the size of the rack 85 to be transported by raising / lowering.

The board supply devices 74 ₁ and 74 ₂ (unit supply device) are configured by connecting the rack 85 to the board supply devices 74 ₁ and 74 _2.
A rack positioning mechanism 104 for positioning inside is provided.

Substrate supply device 74₁, 74₂And flow solder
Machine 72₁, 72₂Between the board width switching conveyor 83
₁, 83₂Is provided. Substrate width switching conveyor 83₁,
83 ₂Is equipped with an adaptive substrate width switching mechanism 105,
The conveyor width w is switched according to the width of the PB to be sent.
be able to. The conveyor width w is, for example, the minimum width w₁=
Maximum width w from 80 mm₂Can be set between = 330mm
It

The flow soldering machines 72 ₁ and 72 ₂ are equipped with a conveyor width switching mechanism for switching the internal conveyor width according to the PB width to be processed.

The soldering line control unit for controlling the soldering line 70 includes a conveyor / soldering machine control personal computer 29, a conveyor control board 71, and soldering machine control boards 73 ₁ and 73 _2.
Consists of

Input branch unit 78, buffer conveyor 8
Bar code readers (BCR) are provided at 2 ₁ and 82 ₂ , respectively.
92, 93, 94 are provided. The information on the barcode read by the BCRs 92 to 94 is supplied to the conveyor / soldering machine control personal computer 29.

Next, the operation of the soldering line 70 up to the soldering process will be described. Buffer conveyor 82 ₁ , 8
There are two methods of switching the adaptive rack width between 2 ₂ and the board supply devices 74 ₁ and 74 ₂ , an online mode under the control of the conveyor / soldering machine control personal computer 29 and an offline mode under the conveyor control board 71.

(Operation in Online Mode) FIG.
The switch provided in the panel 71a of the conveyor control panel 71 is shown. In the online mode, the online / offline changeover switch 132 of the panel 71a is set to online.

(1) The rack 85, for which the inserting operation has been completed in the inserting step 62, is moved from the conveyor 39 to the conveyor 77 and conveyed to the input branching section 78.

(2) The bar code of the rack 85 conveyed to the input branching section 78 is read by the bar code reader 92. The read bar code information is supplied to the conveyor / soldering machine control personal computer 29.

(3) Conveyor / soldering machine control personal computer 29
Is the unit drawing number and PB width of the PB housed in the rack 85, using the read bar code information.
Information associated with the solder holding time is acquired from the line control system 26.

The conveyor / soldering machine control personal computer 29 is
The size of the rack 85 is determined from the read rack identification number of the bar code information, and information indicating whether the size of the rack 85 is the M size or the L size is supplied to the conveyor control panel 71. In addition, any of the substrate supply devices 74 ₁ and 74 ₂
Then, the conveyor control panel 71 is supplied with information designating whether or not the rack 85 should be transported.

The conveyer / soldering machine control personal computer 29 is
The rack 85, the PB width, and the solder holding time are associated with each other.
The board to which the board is to be transported, using information and according to a built-in program
Supply device 74₁, 74₂The conveyor control panel 71
Substrate supply device 74 ₁, 74₂Is specified.

For example, the adaptive rack sizes of the size switching mechanisms 102 and 103 are switched, and the board width switching conveyor 83 is used.
The board supply devices 74 ₁ and 74 ₂ of the transfer destination are designated so that the frequency of switching the conveyor widths of ₁ and 83 ₂ and the flow soldering machines 72 ₁ and 72 ₂ is minimized. By doing so, it is possible to maximize the operation rate of the flow soldering machines 72 ₁ and 72 ₂ .

(4) The conveyor control board 71 is connected to the branch parts 81 ₁ and 81 ₂ of the board supply devices 74 ₁ and 74 ₂ of the transfer destination specified by the conveyor / soldering machine control personal computer 29 by the conveyors 79 and 80. , The rack 85 is transported.

(5) The conveyor control board 71 receives the board supply device 74 ₁ of the transfer destination based on the information supplied from the conveyor / soldering machine control personal computer 29 and indicating whether the rack 85 is the M size or the L size. 74 ₂ , the size switching mechanism 10
Instruct to raise or lower 2,103. Rack 85 is M
When the size of the rack is 85 _M , the size switching mechanism is instructed to rise. When the size of the rack 85 is the L size rack 85 _L , the size switching mechanism is instructed to descend.

The conveyor control board 71 is the size switching mechanism 1
After the operations of 02 and 103 are completed, the branching units 81 ₁ and 81
₂ to the buffer conveyors 82 ₁ and 82 ₂ which are connected to the designated transfer destination substrate supply devices 74 ₁ and 74 ₂ , and the rack 85.
To be transported.

(6) The rack 85 is the buffer conveyor 8
When conveyed to 2 ₁ and 82 ₂ , the bar code reader 93,
The bar code of the rack 85 is read by 94, and the bar code information is input to the conveyor / soldering machine control personal computer 29.

The rack 85 is made to stand by at the positions of the buffer conveyors 82 ₁ and 82 ₂ in advance until the processing of the rack 85 supplied to the substrate supply devices 74 ₁ and 74 ₂ is completed.

(7) Substrate supply devices 74 ₁ and 74 _{2 in} advance
When the processing of a rack 85 which is supplied with ends, soldering machine control panel 73 _1, 73 _2, the conveyor / soldering machine control computer 29, notifies the completion of processing.

(8) Conveyor / soldering machine control personal computer 29
Is the rack 85 and the PB obtained from the bar code read by the bar code readers 93 and 94 after the completion of processing is notified from the soldering machine control boards 73 ₁ and 73 _2.
Based on the information in which the width and the solder holding time are associated with each other, the information of the PB width and the solder holding time is provided to the soldering machine control boards 73 ₁ , 73.
₂ and flow soldering machines 72 ₁ and 72 ₂ .

(9) Soldering machine control panel 73₁, 73₂Instructions
The substrate supply device 74₁, 74 ₂Is a buffercon
Bear 82₁, 82₂From the rack 85 to the substrate supply device 7
4₁, 74₂To the rack positioning mechanism 104
Then, the rack 85 is fixed.

(10) The soldering machine control boards 73 ₁ and 73 ₂ are supplied to the flow soldering machines 72 ₁ and 72 ₂ in advance.
When the soldering process of B is completed, the flow soldering machine 72
_When notified from ₁ , 72 ₂ , the board width switching conveyor 83
Instruct ₁ and 83 ₂ to adjust the conveyor width w. For example,
If the PB width to be soldered next is 230 mm, the conveyor width w is instructed to be adjusted to 230 mm.

(11) Further, the soldering machine control boards 73 ₁ and 73 ₂
Indicates the conveyor width in the flow soldering machines 72 ₁ , 72 ₂ according to the PB width of the PB to be soldered next, and based on the information of the solder holding time of the PB, the flow rate of the solder jet Instruct.

[0199] Flow soldering machine 72 _1, 72 _2, the conveyor width switching mechanism, and adjusted to the indicated conveyor width, and sets the solder jet amount corresponding to the solder retention time indicated PB.

For example, when the identification information of the solder holding time is 1, the flow rate of the solder corresponding to the solder holding time of 4 to 5 seconds is set, and when the identification information of the solder holding time is 2, the solder holding time is set. The flow rate of the solder jet corresponding to 3 to 4 seconds is set.

(12) When the notification of the completion of the adjustment of the conveyor width in the flow soldering machines 72 ₁ and 72 ₂ is received, the soldering machine control boards 73 ₁ and 73 ₂ inform the board supply devices 74 ₁ and 74 _2. To instruct the start of PB supply. Substrate supply device 74 ₁ ,
74 ₂ is compatible with PBs of various shapes. The substrate supply devices 74 ₁ and 74 ₂ instructed to start the supply of PB take out the PBs one by one from the rack 85 and send them to the substrate width switching conveyors 83 ₁ and 83 ₂ .

[0202] substrate width switching conveyor 83 _1, 83 PB fed into the ₂ from the substrate width switching conveyor 83 _1, 83 _2, are conveyed to the conveyor flow soldering machine 72 _1, 72 _2, is set The soldering process is performed depending on the solder holding time.

(13) The board supply devices 74 ₁ and 74 ₂ move up and down the rack 85 and send the PBs in the rack 85 one by one to the board width switching conveyors 83 ₁ and 83 _{2 so} that all PBs
When the feeding of the substrates is completed, the empty racks 85 are provided on the lower sides of the substrate supply devices 74 ₁ and 74 _{2 and} the conveyors 101 ₁ and 1
Place it on 01 ₂ and discharge.

(14) By repeating the above operations (1) to (13), the M size rack 85 _M and the L size rack 85
It is possible to solder PBs of various sizes stored in _L.

In FIG. 14, an M size rack 85 _M is held on the buffer conveyor 82 ₁ and the substrate supply device 74 ₁ , and the buffer conveyor 82 ₂ and the substrate supply device 74 ₂ are set to L level.
It shows a state in which the size rack 85 _L is held.

(Operation in Offline Mode) In the offline mode, the online / offline changeover switch 132 of the panel 71a is set to offline.

In the off-line mode, the substrate supply device 7 is operated by the size designation switches 133 and 134 of the panel 71a.
The rack size to be processed by 4 ₁ is specified, and the rack size to be processed by the substrate supply device 74 ₂ is specified by the size specifying switches 135 and 136.

For example, when the substrate supply apparatus 74 ₁ processes only the M size rack 85 _M, the size designation switch 133 for designating the M size is turned on and the size designation switch 134 for designating the L size is turned off. . Also, when processing only the L size rack 85 _L ,
The size designation switch 134 for designating the L size is turned on, and the size designation switch 133 for designating the M size is turned off.

Rack M 85 of either M size or L size
_When processing _M and 85 _L , size specification switch 1
Both 33 and 134 are turned on.

Similarly, the rack sizes processed by the substrate supply device 74 ₂ are designated by the size designation switches 135 and 136 for designating the M size and the L size, respectively.

The off-line mode is used especially when it is desired to dedicate the substrate supply devices 73 ₁ and 73 ₂ to the M size rack 85 _M or the L size rack 85 _L , respectively.

The processing corresponding to (1) to (5) in the online mode is executed as follows by the sequence program built in the conveyor control panel 71.

(1) The rack 85, for which the inserting operation has been completed in the inserting step 62, is moved from the conveyor 39 to the conveyor 77 and conveyed to the input branching section 78.

(2) The bar code of the rack 85 conveyed to the input branching section 78 is read by the bar code reader 92. The read bar code information is supplied to the conveyor / soldering machine control personal computer 29.

(3) Conveyor / soldering machine control personal computer 29
Determines the size of the rack 85 from the read rack identification number of the bar code information, and supplies the conveyor control panel 71 with information indicating whether the size of the rack 85 is the M size or the L size.

(4) Conveyor control board 71 uses rack size information from conveyor / soldering machine control personal computer 29, and board supply device 7 with size designation switches 134-136.
4 ₁ and 74 _{2 respectively} designated rack sizes, and racks 8 which are currently being processed by the substrate supply devices 74 ₁ and 74 _{2 respectively.}
Based on the size of 5 and the size of the rack 85 to be processed next time, the substrate supply devices 74 ₁ and 74 ₂ of the transfer destination are determined.
At this time, for example, the rack size switching mechanisms 102 and 103
Substrate supply devices 74 ₁ and 74 ₂ are designated so as to minimize the frequency of rack size switching.

The board supply device 7 of the determined transfer destination
The conveyor 7 is provided at the branching portions 81 ₁ and 81 ₂ of 4 ₁ and 74 _2.
The rack 85 is transported by 9,80.

(5) The conveyor control board 71 is configured to transfer the board supply devices 74 ₁ and 74 of the transfer destination based on the rack size information supplied from the conveyor / soldering machine control personal computer 29.
₂ is instructed to raise or lower the size switching mechanisms 102 and 103.

The conveyor control board 71 is the size switching mechanism 1
After the operations of 02 and 103 are completed, the branching units 81 ₁ and 81
₂ from the buffer conveyors 82 ₁ and 82 ₂ to the rack 85
To be transported.

The processes corresponding to (6) to (14) in the online mode are similarly executed in the offline mode.

In the offline mode, the conveyor control panel 7
1 is the rack 85 read by the barcode reader 78
Board supply device 7 of the transfer destination based on only the rack size information.
4 ₁ and 74 ₂ are determined. Therefore, as compared with the online mode, the switching frequency of the size switching mechanisms 102 and 103 and the frequency of switching the conveyor width of the board width switching conveyors 83 ₁ and 83 _{2 and} the conveyor width of the flow soldering machines 72 ₁ and 72 ₂ are higher. Will increase.

As described above, the soldering line 70 of this embodiment is used.
Then, based on the bar code read from the rack 85,
The rack sizes to which the transfer conveyor 75 and the board supply devices 74 ₁ and 74 ₂ are adapted are automatically switched according to the size of the rack 85, and the buffer conveyors 83 ₁ and 83
It is possible to automatically switch the conveyor widths of ₂ and the flow soldering machines 72 ₁ and 72 ₂ according to the PB width. Therefore, PBs of various sizes can be mixed and flowed.

[Buffer Station] At the exit of the flow soldering machines 72 ₁ and 72 ₂ , when the worker leaves the seat, a temporary P
A buffer station 110 for stocking B is provided. FIG. 18 shows a plan view near the buffer station 110. In addition, here, the flow soldering machine 7
The case of the buffer station 110 provided at the outlet of 2 ₁ is shown, but the same applies to the buffer station 110 provided at the outlet of the flow soldering machine 72 ₂ .

The buffer station 110 includes a belt conveyor 111, transfer conveyors 112, 113, 114,
115, belt conveyor 116, buffer device 11
7 _A and 117 _B , and a control unit 118. The buffer devices 117 _A and 117 _B can stock a plurality of PBs, for example, 12 PBs.

FIG. 19 is a main operation panel 1 of the control unit 118.
18a shows a layout of 18a. A power switch 121, an operation start switch 122, an operation stop switch 123, a reset switch 124, and a buffering switch 125 are provided on the main operation panel 118a. Also, the power lamp,
A buzzer etc. are provided.

1. When the operator is seated When the operator is seated, the buffering switch 125 is turned off and the buffer station 110
Allow normal operation.

In normal operation, the PB discharged from the flow soldering machine 72 ₁ is conveyed in the order of the belt conveyor 111, the transfer conveyors 112 and 113, and the belt conveyor 116. The operator picks up the PB conveyed to the belt conveyor 116 and puts it in the empty container 87 associated with the unit drawing number of the PB. After storing a prescribed number of PBs in the container 87, the operator places the container 87 on the conveyor 131. The conveyor 131 conveys the placed container 87 to the receiving station 54 of the synchronous scheduler 51.

A substrate sensor is provided on the belt conveyor 116, and the presence or absence of PB can be detected. During normal operation, when the PB stays on the belt conveyor 116 for a prescribed x time due to some trouble or the like, the control unit 118 automatically switches to the buffering operation,
The transfer conveyor 114 is given a command to stop the conveyance of PB, and the transfer conveyors 112 and 113 are
A command to convey the PB to the buffer device 117 _B is given. As a result, the PB discharged from the flow soldering machine 72 ₁ is transferred to the belt conveyor 111 and the transfer conveyor 11
In order 2,113, forcibly conveyed into the buffer device 117 _B, it is stocked in the buffer unit 117 in _B.

Further, in this case, the control unit 118 notifies the administrator of the abnormality by the alarm by the buzzer and the lamp.

In order to return to the normal operation, first, the substrate unloading switch 119 is pressed, and then the buffer device 1
The PB stocked in 17 _B is taken out. Thereafter, by pressing the reset switch 124, thereby homing substrate storage mechanism of the buffer unit 117 _B. After this, the operation start switch 122 is pressed to restart.

2. When the worker leaves the seat When the worker leaves the seat, the buffering switch 1
25 is turned on to cause the buffer station 110 to perform the buffering operation.

In this case, there is no PB on the belt conveyor 116 so that an alarm does not occur. In this buffering operation, the PB discharged from the flow soldering machine 72 ₁ is conveyed in the order of the belt conveyor 111, the transfer conveyors 112, 114, 115, and the buffer device 117 _A , and the PB is transferred to the buffer device 117 _A. Stocked. From the time when the buffer device 117 _A becomes full, the belt conveyor 111 and the transfer conveyors 112, 11
3, the buffer device 117 _B is conveyed in this order, and the PB is stocked in the buffer device 117 _B.

When the worker turns off the buffering switch 125, the PBs are discharged from the buffer devices 117 _A and 117 _B to the transfer conveyors 112 and 114 in order from the last buffered PB. PB discharged
Are conveyed to the belt conveyor 116. However, the PB discharged from the flow soldering machine 72 ₁ is preferentially transported.

The operator manually operates the buffer device 117 _A , 1
When removing PB from 17 _B , the substrate removal switch 119 is pressed and then the buffer devices 117 _A , 11
The PB stocked in 7 _B is taken out. After that, the reset switch 124 is pushed to push the buffer devices 117 _A , 1
17 Return the board storage mechanism of _B to the origin. After this, the operation start switch 122 is pressed to restart.

In this way, the flow soldering machines 72 ₁ , 72
By providing the buffer station 110 at the exit of ₂ , the PB can be temporarily stocked when the worker leaves the seat. Further, when the PB is stagnant due to some trouble or the like, the PB can be automatically stocked.

FIG. 20 is a block diagram of the assembly line 141 of the second embodiment of the present invention. In FIG. 20, FIG. 1 and FIG.
The same components as those of the above are denoted by the same reference numerals, and description thereof will be appropriately omitted.

The assembly line 141 includes the control computer section 14
2 and a line portion 143. Control computer section 1
42 comprises a master system 23, a floor control system 24, and a line control unit 25 ₂ . The line control unit 25 ₂ is the line control system 2
6 ₂ , input management personal computer 27 ₂ , synchronous scheduler control personal computer 28 ₂ , synchronous scheduler control personal computer 30 ₂
Consists of

The line section 143 is for the synchronization scheduler 35.
₂ , insertion line UI _P , conveyor 159, soldering line 170, conveyors 176 and 177, board management storage 182, conveyor 181, conveyor 178, correction line UA _P , conveyor 183, synchronization scheduler 191,
It consists of finishing line UF _P and conveyor 199.

The inserting step 162 includes a plurality of inserting line UIs.
_The soldering process 163 consists of _P , and the soldering line 1
It is composed of 70. The correction process 164 is composed of a plurality of correction lines UA _P , and the finishing process 165 is composed of a plurality of finishing lines UF _P.

In the assembly line 141 of the second embodiment, a plurality of PBs having a unit shape having a fixed shape are handled, the PB before the insertion processing is stored in the rack 85 and conveyed, and the PB after the insertion processing is The sheets are conveyed between the respective steps. Further, the pre-attached parts and the post-attached parts are placed in the parts boxes 86 and 88, respectively, and transported between the respective steps.

[0241] synchronization scheduler 35 ₂ has the same function as that of the synchronization scheduler 35 of the first embodiment, are receipts in serving process, temporarily stores the rack 85 and parts box 86 is unloading in the insertion step 162. Also, the synchronization scheduler 19
1 temporarily stores the component box 88 containing the retrofit components, which has been stored in the servicing process, and is delivered to the finishing process 165.

Next, the operation of the assembly line 141 will be described.

[Serving Process] In each line of each process, the number of personnel instructed by the input management PC 27 ₂ is arranged in advance. The function of the input control PC 27 ₂ is
This is the same as the input management control personal computer 27 of the first embodiment.

Rack 85, container 87, parts box 86,
A bar code (including information such as container type, container number, container size, etc.) for identifying each one is attached to 88. Further, a unit drawing number indicating the type of PB unit is attached as a bar code to each PB.

At the time of servicing work, the racks 85,
Relationship between container 87 and PB stored in it, rack 8
The registration work for associating the relationship between 5 and the parts box 86 and the relationship between the rack 85 and the parts box 88 is performed using the loading management control personal computer 27 ₂ .

In the registration work, the input management control personal computer 27
_The bar code reader connected to ₂ causes the corresponding rack 85 and container 87 to read the PB bar code (bar code of the unit drawing number) to be stored, and associates the rack 85 and container 87 with the stored PB. Similarly, by reading the bar code, the rack 85 and the component boxes 86 and 88 are associated with each other.

In this way, the rack 85, the container 87,
Information in which the unit drawing number of the PB and the relationship between the component boxes 86 and 88 are associated with each other is supplied to and stored in the line control system 26 ₂ .

The PB taken out from the serving rack 60 is stored in the associated rack 85, and the attached parts to be inserted into the PB are stored in the parts box 86 associated with the unit drawing number of the PB. .

The synchronous scheduler control personal computer 28 ₂ is
A loading instruction for instructing the storage of the rack 85 and the parts box 86 is displayed on a display or the like. In accordance with this loading instruction, the worker stores the rack 85 storing the PB and the component box 86 storing the pre-attached component in the synchronous scheduler 35 ₂ . This warehousing is performed prior to the time of leaving the insertion line UI _P (for example, half a day before).

At the time of warehousing, the bar code is read by the bar code reader 91 of the warehousing station 37 and input to the synchronous scheduler control personal computer 28 ₂ . When the barcode is read, the synchronous scheduler control personal computer 28 ₂ gives a storage instruction to the synchronous scheduler control panel 36 ₂ . Receiving goods receipt instruction, the synchronization scheduler control panel 36 ₂ controls the rack master 44 takes the goods receipt station 37, the rack 85 or component box 86,
Store in the designated shelf 41.

Further, the retrofit parts to be attached to the PB in the finishing process 165 are taken out from the distribution rack 60 and stored in the parts box 88 associated with the unit drawing number of the PB.

The synchronous scheduler control personal computer 30 ₂ for controlling the synchronous scheduler 191 displays a loading instruction for instructing the storage of the parts box 88 on the display or the like. According to this input instruction, the worker stores the parts box 88 storing the retrofit parts in the synchronization scheduler 191.

Similar to the case of storing in the synchronous scheduler 35 ₂ , when the component box 88 is stored, the bar code is read by the bar code reader 95 of the storing station 53 and input to the synchronous scheduler controlling personal computer 30 ₂ . When the barcode is read, the synchronous scheduler control personal computer 30 ₂ gives a storage instruction to the synchronous scheduler control panel 192. In response to the storage instruction, the synchronous scheduler control panel 192 controls the rack master 44 to take in the component box 88 from the storage station 53 and store it in the instructed shelf 41.

[Insertion Step] The function of the synchronization scheduler 35 ₂ is the same as the function of the synchronization scheduler 35 of the first embodiment.

The synchronization scheduler control personal computer 28 ₂ is
In order to supply the rack 85 and the parts box 86 to each insertion line UI _P , a delivery instruction is given to the synchronous scheduler control board 36 ₂ . Synchronized scheduler control panel 3 in response to the issue instruction
6 ₂ controls the rack master 44 extracts the rack 85 or component box 86 is specified from the shelf 41 to be conveyed to the designated unloading station 38.

[0256] The worker operates the corresponding exit station 38.
Rack 85 and parts box 8 that have been delivered to the outer end 45a of the
6 is fetched at the start position of the insertion line UI _P.

[0257] synchronization scheduler 35 _2, a component box 86 and the rack 85 are associated with this, continue to unloading the goods issue station 38. Therefore, PB and this P
Insert line UI that completely synchronizes the parts to be inserted into B
Can be supplied to _P.

Similar to the first embodiment, the delivery station 38
The rack 85 and the component box 86 to be next delivered are stored in the synchronous scheduler 35 ₂ until the rack 85 and the component box 86 are no longer accumulated in the storage.

For this reason, the operator can insert each insertion line UI _P
Monitor the progress of work in the rack 85 and parts box 8
There is no need to judge the supply timing of 6 automatically,
The rack 85 and the parts box 86 can be supplied to each insertion line UI _P at the optimum timing.

As in the first embodiment, the synchronous scheduler control personal computer 28 ₂ uses the load management function so that the difference in the number of in-process man-hours between the insertion lines UI _P is minimized. controls allocation to each insert line UI _P of, also has the efficiency management, work in process management.

At each insertion line UI _P , the operator inserts a component into PB. The PB in which the components have been inserted is placed on the conveyor 159 and conveyed to the soldering step 163.
The emptied parts box 86 is returned to the serving rack 60.

[Soldering Step 163] When the sensor 202 provided at the entrance of the soldering step 163 detects the arrival of PB, the conveyor control panel 171 causes the conveyor 175 to move.
The PB is carried to either of the flow soldering machines 171 ₁ and 171 ₂ .

In the flow soldering machines 171 ₁ and 171 ₂ , the conveyor width and the like are set in advance in accordance with the board width of the PB flowing on the line 141.

The PB soldered by the flow soldering machines 171 ₁ and 171 ₂ has the buffer station 11
Transported to 0. The PB transported to the buffer station 110 is placed on the conveyor 176 by an operator.

[Correction Process] Board management storage 182
(Unit storage device) is a PB overflowing before the correction process 164 and a PB overflowing before the finishing process 165.
Is a device for automatically and temporarily storing.

[0266] The loading / unloading conveyor 177 is the conveyor 176.
The conveyor 177a conveys PB from the board management storage 182 toward the board management storage 182, and the conveyor 176b conveys PB from the board management storage 182 to the downstream conveyor 178.

Branches 180 and 181 for switching the destination of PB from the conveyor 176 are provided at the connection between the conveyor 176 and the conveyor 177.

The sensor 206 is provided at the discharge port 179 of the conveyor 178 provided corresponding to the start end of each correction line UA _P.
(Residence detector) is provided. PCB management control personal computer 1
87 (storage control unit) detects the discharge port 1 by the sensor 206.
The retention of PB at 79 can be detected, and it is determined from the retention status of PB at the discharge port 179 corresponding to each correction line UA _P whether there is a vacancy in the input man-hours or full in the correction process 164.

The arrival of PB is detected by the sensors 203 and 204 provided in front of the branch sections 180 and 181. If the board management control personal computer 187 determines that there is a vacancy in the input man-hours in the correction step 164, the branching sections 180, 18
1 is controlled to convey PB from the conveyor 176 to the conveyor 178 via the conveyor 177b. At this time, the order of the PB unit drawing numbers does not matter. The PB transported to the discharge port 179 is taken into the start end of the correction line UA _P by the worker. At this time, the order of PB unit drawing numbers may be random.

The board management control personal computer 187 is equipped with a discharge port 1
When it is determined that the PB is staying at 79 and the correction process 164 is full, the branching units 180 and 181 are controlled to transfer the PB from the conveyor 176 to the conveyor 177.
It is transferred to the board management storage 182 via a.

An entrance / exit 18 of the board management storage 182
The barcode of the PB having reached 2a is read by the barcode reader 205. This bar code is input to the board management control personal computer 187. The board management control personal computer 187 controls the board management storage 182 to store the PB in a designated position in the board management storage 182.

The board management control personal computer 187 manages the PB stored in the board management storage 182 by the unit drawing number in the bar code.

When the board management control personal computer 187 determines that the man-hours required for the repairing step 164 are sufficient, it controls the board management storage 182 to store the board management storage 182 at a designated position. Put out PB. The delivered PB is conveyed to the discharge port 179 via the conveyor 177b and the conveyor 178, and is taken into the start end of the correction line UA _P.

The PB on which the correction work is completed on the correction line UA _P is placed on the conveyor 178 by the worker.

As described above, the PB to be input next is automatically and temporarily stored in the board management storage 182 until the PB remains in the correction step 164. Therefore, the work speed up to the soldering process 163 and the correction process 1
Even if the work speed at 64 does not match, it is not necessary for the worker to remove the PB overflowing between the steps. Therefore, management man-hours can be significantly reduced.

[Finishing Process] The conveyor 183 includes a conveyor 183a for conveying the PB from the conveyor 178 toward the board management storage 182, and a board management storage 182.
And a conveyor 183b that conveys the PB from No. 1 to the downstream conveyor 185.

A branch portion 184 for switching the destination of PB is provided at the connection portion of the conveyors 178, 183 and 185.

A sensor 210 is provided at the discharge port 186 of the conveyor 185 provided corresponding to the starting end of each finishing line UF _P.
(Residence detector) is provided. PCB management control personal computer 1
The sensor 87 can detect the retention of PB at the outlet 186 by the sensor 210, and from the retention status of PB at the outlet 186 corresponding to each finishing line UF _P , the finishing process 1
It is determined whether or not the input man-hour at 65 is full or full.

Finishing line UF of finishing process 165_PTo serve
The PB to be supplied is currently the finishing line UF _PUsed in
It is necessary to use PB of the unit drawing number corresponding to the antenna 87.
is there. Therefore, if necessary, the board management storage 1
Swap the unit drawing numbers using the temporary storage function of 82.
To do.

The arrival of PB is detected by the bar code reader 207 provided in front of the branching unit 184. The read bar code is input to the board management control personal computer 187.

When the board management control personal computer 187 determines that there is a vacancy in the input man-hours in the correction process 164 and the unit drawing number is not required to be replaced, it controls the branching unit 184 to remove the PB from the conveyor 178. , And conveys to the conveyor 185. The PB transported to the discharge port 186 is taken into the start end of the finishing line UF _P by the worker.

The board management control personal computer 187 is provided with the discharge port 1
When it is determined that the PB is stagnant at 86 and the finishing process 165 is full, the branching unit 184 is controlled,
The PB from the conveyor 178 is conveyed to the board management storage 182 via the conveyor 183a.

An entrance / exit 18 of the board management storage 182
The arrival of PB at 2b is detected by the sensor 208. When the arrival of PB is detected, the board management control personal computer 187 controls the board management storage 182,
The PB is stored in a designated position in the board management storage 182.

The board management control personal computer 187 uses the bar code reader 2 to store the PB stored in the board management storage 182.
It is managed by the unit drawing number of the barcode read in 07.

When the board management control personal computer 187 determines that the man-hours required for the finishing process 165 are sufficient, it controls the board management storage 182 to store the board management storage 182 at a designated position. Put out PB. The delivered PB is conveyed to the outlet 186 via the conveyor 183b and the conveyor 185, and is taken into the starting end of the finishing line UF _P.

Although the board management control personal computer 187 determines that it is necessary to replace the unit drawing number even though the finishing process 165 has a vacant man-hour, the PB arriving at the branch unit 184 is temporarily stored in the board management storage 182. The PB to be conveyed to the conveyor 185 first is discharged from the board management storage 182. The discharged PB is discharged through the outlet 186 through the conveyor 183b and the conveyor 185.
And is taken into the starting end of the finishing line UF _P. In this way, the board management control personal computer 187
The unit drawing numbers are exchanged so that the PB corresponding to the container 87 currently in use is supplied.

As described above, the PB to be input next is automatically and temporarily stored in the board management storage 182 until the PB stays in the finishing step 165. Therefore, the work speed up to the correction step 164 and the finishing step 16
Even if the work speed in 5 does not match, the operator does not need to remove the PB overflowing between the steps, and the required management man-hours can be greatly reduced.

Synchronous scheduler 19 for supplying retrofit parts
The first shipping station 57 is provided near the discharge port 186 and corresponding to each finishing line UF _P.

The PB conveyed to the discharge port 186 has its bar code read by the bar code reader 209 provided in the front. The read bar code is input to the synchronization scheduler control personal computer 30 ₂ .

By the bar code reader 209, the discharge port 1
It is possible to detect that a specified number of PBs of the same unit drawing number are supplied to 86. When a specified number of PBs of the same unit drawing number are supplied, the synchronous scheduler control personal computer 30 ₂ supplies a container 87 and a corresponding parts box 88 to each finishing line UF _P , so that the synchronous scheduler control board 30 ₂ Give a delivery instruction to 192. In response to the delivery instruction, the synchronous scheduler control panel 192 controls the rack master 44 to take out the designated component box 88 from the storage rack 41 and convey it to the designated delivery station 57.

The operator works at the corresponding exit station 57.
The parts box 88 that has been unloaded to the finishing line UF _P is taken into the starting position.

In this way, the PB and the retrofit parts attached to the PB can be supplied to the finishing line UF _P in perfect synchronization.

Therefore, unlike the conventional assembly line, it is not necessary for the worker to judge the supply timing and supply the retrofitted parts to the finishing process, and the management man-hours can be greatly reduced accordingly.

[0294]

As described above, according to the invention of claim 1,
If the assembly target unit that completed the previous process cannot be supplied to the next process because the work speed between processes does not match, it can be automatically stored temporarily in the carrier container feeder, so the administrator However, it is not necessary to remove the assembly target unit that overflows between processes, and the management man-hours can be greatly reduced.

Further, since it is possible to supply the assembly target unit and the parts corresponding thereto to each process in synchronization with each other by the transport container supply device, it is necessary for the manager to judge the supply timing and supply the parts. There is no need, and management man-hours can be significantly reduced.

According to the second aspect of the present invention, the load management means assigns the transfer container accommodating the assembly target unit to each line so that the difference in the in-process man-hour between the lines in the process is minimized. Therefore, it is possible to reduce the variation in the load of each line in the process, and it is possible to significantly improve the production efficiency.

According to the third aspect of the invention, by providing the efficiency management means, the manager can quickly detect a line that is delayed due to the occurrence of a failure or the like with a small number of management steps,
It is possible to deal with it and improve the production efficiency.

According to the fourth aspect of the present invention, the work-in-process management means can present the additional work man-hours required to consume the man-hours exceeding the work-in-process allowable value. Therefore, the manager can easily take a countermeasure. Therefore, the production efficiency can be improved.

According to the fifth aspect of the present invention, based on the read identification code, the size of the transfer container adapted to the transfer conveyor and the unit supply device is automatically controlled by the control of the soldering line controller. And the conveyor width of the soldering machine can be automatically switched according to the size of the unit to be assembled.
Therefore, the units to be assembled having various sizes can be mixedly flowed.

According to the sixth aspect of the present invention, even when a plurality of types of assembly target units are mixed and flowed, the solder holding time designated for the assembly target unit can be automatically set in the soldering machine. it can.

According to the invention of claim 7, the frequency of switching the size of the transfer container to which the transfer conveyor and the unit supply device are adapted and the width of the conveyor of the soldering machine are changed.
The destination can be decided so as to minimize it,
The operating rate of the soldering machine can be improved.

According to the invention of claim 8, when the worker leaves the seat temporarily, the assembly target unit can be automatically and temporarily stored outside the line. When there is not enough manpower in the next process, the assembly target unit supplied from the previous process is automatically temporarily stored, and when the manpower is spared in the next process, the stored assembly target unit is taken out and Since it is supplied to the process, the administrator does not need to remove the assembly target unit that overflows between the processes, and the management man-hour can be greatly reduced.

According to the eleventh aspect of the present invention, since the unit to be assembled and the corresponding retrofit parts can be synchronously supplied to the process requiring the postparts by the carrier container supply device. The manager determines the supply timing,
There is no need to supply retrofit parts, and management man-hours can be greatly reduced.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an assembly line according to a first embodiment of the present invention.

FIG. 2 is a more detailed configuration diagram of a line unit according to the first embodiment.

FIG. 3 is a schematic diagram of the structure of a synchronization scheduler.

FIG. 4 is a side view showing the direction D ₁ in FIG.

FIG. 5 is an explanatory diagram of a storage station.

FIG. 6 is an explanatory diagram of a delivery station.

FIG. 7 is an explanatory diagram of a rack that stores printed boards.

FIG. 8 is an explanatory diagram of a relationship between an insertion line and a synchronization scheduler.

FIG. 9 is an explanatory diagram of a relationship between a correction line, a finishing line UF, and a synchronization scheduler.

FIG. 10 is an explanatory diagram of a setting function of a staff member.

FIG. 11 is an explanatory diagram of allocation of man-hours of containers to correction lines.

FIG. 12 is an explanatory diagram of timing and delay notification of a container that leaves the correction line.

FIG. 13 is an explanatory diagram of an in-process allowance value.

14 is a plan view of the soldering line 70. FIG.

FIG. 15 is a diagram showing an example of correspondence between a rack and a printed board to be stored.

FIG. 16 is a diagram showing an example of information in which a rack, a unit drawing number, a board width, and a solder holding time are associated with each other.

FIG. 17 is a panel diagram of a conveyor control panel.

FIG. 18 is a plan view of the vicinity of a buffer station.

FIG. 19 is a layout view of a control panel of the buffer station.

FIG. 20 is a configuration diagram of an assembly line according to a second embodiment of the present invention.

FIG. 21 is an explanatory view of a conventional assembly line for manually carrying between steps.

FIG. 22 is an explanatory diagram of a conventional assembly line using a conveyor.

[Explanation of symbols]

20 assembly line 21 control computer section 22 line section 23 master system 24 floor control system 25 line control section 26 line control system 27 injection management personal computer 28,30 synchronous scheduler control personal computer 29 conveyor / soldering machine control personal computer 35,51 synchronous scheduler 37,53,54,55 Entry station 38,56,57 Entry station 36,52 Synchronous scheduler control panel 39 Conveyor 41 Storage shelf 44 Rack master 45 Conveyor 49 Signal tower 60 Serving shelf 62 Inserting process 63 Soldering process 64 Correcting process 65 Finishing process 71 Conveyor control panel 72 ₁ , 72 ₂ Flow soldering machine 73 ₁ , 73 ₂ Soldering machine control panel 74 ₁ , 74 ₂ Substrate supply device 75 Transport conveyor 82 ₁ , 82 ₂ Buffer conveyor 83 _1, 83 ₂ substrate width switching conveyors 85, 85 _M, 85 _L rack 86,88 component box 87 container 91 to 97 bar code reader 102 and 103 size switching mechanism 104 rack positioning mechanism 105 adapted substrate width switching mechanism 110 buffer station 111, 116 conveyor 112-115 transfer conveyor 117 _A, 17 _B buffer device 118 the control unit 141 assembly line 142 the control computer 143 line portion 25 ₂ line control unit 26 ₂ line control system 27 _2-on administration computer 28 _2, 30 ₂ synchronization scheduler control the personal computer 35 _2, 191 synchronization scheduler 159,176,178,185,199 conveyor 162 insertion step 163 soldering process 164 correction step 165 finishing process 171 conveyor control board 172 _1, 172 ₂ off -Soldering machine 175 Conveyor 177,183 Storage / conveyor 180,181,184 Branch 182 Board management storage 187 Board management control personal computer 202,203,204,206,208,210 Sensor 295,207,209 Bar code reader PB Printed board UI, UI _P insertion line UA, UA _P correction line UF, UF _P finishing line

Claims (11)

[Claims] 1. A transport container that stores a predetermined number of units to be assembled, a storage shelf that can store a transport container that stores a predetermined number of parts, and a warehousing detector that detects the presence or absence of the transport container are provided. Between the entrance and the exit, which is provided corresponding to the start position of the work line of the next process, and which has the exit detector that detects the presence or absence of the transport container, and between the entrance, the storage rack, and the exit. A transfer mechanism that transfers the transfer container, and a control unit that controls the transfer mechanism to store the transfer container through the storage port, and stores the transfer container from the storage shelf to the storage port. The transfer container controlled by the control unit stores a transport container that stores a predetermined number of units to be assembled, which has been supplied to the storage port from the previous process, and a component that has been supplied to the storage port. To store the transported container, For the process in which only the unit to be assembled is supplied by the feeding mechanism, the unit to be assembled is selected based on the standard man-hours of the unit to be assembled when the transport container previously delivered to the delivery port does not stay. For the process in which the stored transport container is delivered to the delivery port and the assembly target unit and the parts corresponding to the assembly target unit are to be supplied, based on the standard man-hours of the assembly target unit, first to the delivery port. A transport container supply device that synchronously issues a transport container storing an assembly target unit and a transport container storing components corresponding to the assembly target unit to the shipping port when the transported transport container has not accumulated An assembly line characterized by having. 2. A transport container including a process comprising a plurality of lines, wherein the control unit of the transport container supply device corresponds to a transport container accommodating an assembly target unit that is assigned to each line in the process at the time of warehousing and has not yet been delivered. In order to minimize the difference in the number of in-process man-hours between the lines, it is preferable to have a load management means for allocating the transfer containers to each line in the process when the transfer container storing the assembly target unit is received. The assembly line according to claim 1, which is characterized in that. 3. The control unit of the transfer container supply device monitors the man-hours of each transfer container storing the assembly target unit that has been delivered to each line of each process, and when a delay occurs for a predetermined time or more. The assembly line according to claim 1, further comprising an efficiency management means for generating an alarm. 4. The control unit of the transfer container supply device sets an in-process allowance value for each process and an in-process allowance value for each line in each process, and each line in the process at the time of storage A process management line for instructing additional work man-hours for processes and lines in which the number of work-in-processes corresponding to the transport container accommodating the assembly target unit that has been assigned to The assembly line according to claim 1, which is characterized in that. 5. A transport container, to which an identification code including information for identifying the size of the transport container and the size of the assembly target unit housed in the transport container is attached, is used to match the size of the assembly target unit. It is equipped with a soldering machine that has a conveyor width switching mechanism that switches the conveyor width, and a size switching mechanism that switches the size of the applicable transport container. It is equipped with a unit supply device that supplies the attached machine and a size switching mechanism that switches the size of the applicable transfer container, and a transfer conveyor that transfers the transfer container that contains the assembly target unit supplied from the previous process to the unit supply device. Based on the identification code read by the identification code reader, the size of the container and the assembly target Identify the knit size, in accordance with the identification result, the size and controls the switching mechanism and the conveyor width switching mechanism, the size of the transport container to accommodate the conveyor and the unit supply device,
The assembly line according to claim 1, further comprising a soldering line including a soldering line controller that switches a conveyor width of the soldering machine. 6. The soldering line control unit switches the solder holding time of the soldering machine according to the solder holding time designated on the unit to be assembled, which is obtained based on the identification code. The assembly line according to claim 5. 7. A plurality of the soldering machines are arranged in parallel, and the transport conveyor is provided with a branching unit for transporting a transport container to any of the unit supply devices corresponding to the soldering machines. The soldering line control unit determines the unit supply device of the transfer destination of the transfer container based on the size information of the transfer container obtained based on the identification code and the size of the assembly target unit, and the determined transfer destination. The assembly line according to claim 5, wherein a branching portion of the transfer conveyor is controlled so that the transfer container is transferred to the transfer container. 8. An assembly target unit discharged from the soldering line when an operator in charge of transferring the assembly target unit discharged from the soldering line to a conveyor following the next step leaves the seat. 6. The assembly line according to claim 5, wherein a temporary storage device for temporarily storing is provided near the discharge port of the soldering line. 9. In an assembly line in which an assembly target unit is conveyed from a previous process to a next process by a conveyor, the assembly target unit supplied from the previous process is automatically used when there is no manpower margin in the next process. And an inter-process managing means for temporarily storing the assembled unit in the next process and supplying it to the next process when the unit to be assembled is stored. 10. The inter-process management means is connected to a unit storage device capable of storing a plurality of units to be assembled and upstream and downstream conveyors before the next process, and the units to be assembled from the upstream are downstream. A branch unit for switching between carrying to the conveyor of the unit storage device side or to the unit storage device side, and an assembly target unit provided from the branch unit to the unit storage device side. The loading and unloading conveyor that transports the assembly target unit that has been unloaded from the unit storage device to the next process side, the retention detector that detects the retention of the assembly target unit in the next process, and the retention detector. If it is determined that there is no room in the man-hours in the next process based on the detected stagnation state, the unit to be assembled is stored in the unit storage device. When the branch unit and the unit storage device are controlled and it is determined that the man-hours in the next process can be spared, the storage control unit controls the branch unit and the unit storage device so that the unit to be assembled is transported to the next process. 10. The assembly line according to claim 9, wherein the assembly line is composed of parts. 11. A storage shelf capable of accommodating a transport container containing a predetermined number of parts, a storage port provided with a storage detector for detecting the presence or absence of the transport container, and a work of a process requiring a retrofit component. A shipping outlet provided corresponding to the start position of the line,
A transfer mechanism for transferring the transfer container between the input port, the storage shelf, and the output port, and a transfer mechanism that controls the transfer mechanism to store the transfer container through the input port, and the transfer port from the storage shelf. And a control unit for unloading the transfer container, and a transfer mechanism controlled by the control unit stores a transfer container storing the retrofit parts supplied to the storage port, and the transfer mechanism, With respect to the assembly target unit and the process for supplying the post-assembly parts corresponding to the assembly target unit, in synchronization with the supply of the specified number of the assembly target units to the process by the conveyor, the retrofit parts are stored. The assembly line according to claim 9, further comprising: a transport container supply device that delivers the transport container to a delivery port and supplies the transport container to the process.