JP2744689B2 - Automatic line transfer system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial applications]

The present invention relates to, for example, a transfer system of an automatic line in a vehicle production plant, in particular, temporarily carries in a predetermined lane a paint-defective vehicle body or a vehicle body that has not been procured in a vehicle assembly process, and waits.
The present invention relates to an automatic line transfer system suitable for adjusting the transfer order of each vehicle body.

[Prior art]

In recent years, vehicle production plants have transported multiple types of vehicle bodies on the same line to deal with diversifying user needs for vehicle paint colors and specifications, and to achieve more efficient process management. A mixed flow system that performs various types of processing such as sets is adopted.

[Problems to be solved by the invention]

By the way, as described above, when various types of vehicle bodies are conveyed on the same line and various painting work is completed in the painting process, when the painted surface of the painted body has irregular painted surface such as unevenness, When parts such as the engine to be mounted on the painted body are not procured in the post-assembly process, these bodies are once brought into a predetermined lane, waited and forwarded, and then corrected for poorly painted bodies. It is necessary to carry out the work to the car assembly process after carrying out the work, or to carry out the work to the car assembly process when parts are procured in the car assembly process. However, in a conventional vehicle production plant, there has been a problem that the automation of the transfer sequence control of the vehicle body with poor painting or the vehicle body not procuring parts as described above has not been realized. SUMMARY OF THE INVENTION The present invention solves the above-mentioned problems, and transports a poorly-painted vehicle body or a vehicle body that has not been procured in a vehicle assembly process to a predetermined lane and waits, and adjusts the transportation order of each vehicle body, thereby controlling transportation and controlling production. The purpose of the present invention is to provide an automatic line transfer system that achieves higher efficiency.

[Means for Solving the Problems]

In order to achieve the above object, the present invention is directed to an automatic line configured to sequentially transport a plurality of workpieces and perform various processes such as painting and assembly. A transport means for loading and transporting the workpieces together with the identification information of the workpieces, and a temporary storage means disposed in the middle of the automatic line for temporarily loading the transport means for loading the normal workpieces transported from the painting process. A transfer order adjustment lane having a lane, a standby lane for temporarily storing a transfer means for loading a workpiece with unpainted defective work or a workpiece not assembled in a later process, and a transfer lane on the transfer means loading side of the transfer order adjustment lane. Detecting means for detecting presence / absence of transport means and identification information on the loading side of the transport order adjustment lane; and detecting the transport order based on a detection result by the detecting means. Determining means for determining whether the transporting means conveyed to the alignment lane is loading a normal paint work, or loading a defective paint work or unpurchased work; and the transporting means conveyed to the transfer order adjusting lane by the determining means. When it is determined that the normal loading of the workpiece is carried, the transporting means is carried into the normal lane and stored, while the transporting means which is transported to the transport order adjusting lane is determined to be loaded with the defective paint work or the unpurchased workpiece. In the case, it comprises transport control means for loading the transport means into the standby lane and storing the transport means, and the transport control means, when loading the transport means into the normal lane and storing it,
Among a plurality of the normal lanes, a loading processing means for loading and storing the transport means into a normal lane in which a work having the same mechanism as the work to be loaded and transported by the transport means is stored, and stored in the normal lane. When carrying out the transporting means, there is provided an unloading processing means for preferentially transporting out the transporting means from a normal lane in which a plurality of works of the same model are stored in a predetermined number or more.

[Action]

According to the present invention, when the transport means that is transported from the coating process to the transport order adjustment lane is loaded with a normal coating work,
The transport means is carried into a normal lane. On the other hand, when the transfer means conveyed from the painting process to the transfer order adjustment lane is loaded with a paint defective work or a part unpurchased work, the transfer means is carried into the standby lane.

【Example】

Hereinafter, an automatic line transfer system according to an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic view of a coating line of a vehicle production plant according to the present embodiment. First, the steps of the coating line will be described. After the vehicle body S is temporarily stored in a welding stock shop, it is mounted on a hanger conveyor (not shown). It is placed and transported to the pre-processing unit 1, where the pre-processing is performed, and the electrodeposition coating is performed through the steps of the electrodeposition unit 2 and the electrodeposition furnace 3.
Next, the sealing process is performed on the seam portion of the iron plate by the sealer 4, and the process on the floor lower portion is performed by the undercoat portion 5. Then, it reaches the inspection section 7 via the sealer furnace 6, where the electrodeposition coating is inspected. After passing through the inspection section 7, the intermediate coating process is performed through the intermediate coating section 8 and the intermediate coating furnace 9. After the intermediate coating process, the process reaches the inspection unit 11 via the color alignment storage 10, and inspects the intermediate coating. Next, after the application of the indicated color is performed in the overcoating section 12, baking is performed in the overcoating furnace 14, so that the overcoating process is completed. Various inspections are performed on the vehicle body S that has been subjected to the overcoating by the inspection unit 15,
The vehicle body S reaches the wax processing section 19 via the painting stock place 18, where the wax is applied, and the waxed vehicle body S is conveyed to the painting stock place 20. In the painting stock sites 18 and 20, rearrangement for efficiently paying out the vehicle body S to a post-process (car assembly process) is performed. The control of loading / unloading of the hanger and the loading of a normal vehicle in the painting stock site 18 will be described later. Also, in the car assembly process, the work of each process differs depending on the type of vehicle body / destination / opposition, and efficiency is required for the permutation of the vehicle body that conveys the line. Is rearranged in accordance with. In addition, the rearrangement work is performed at the painting stock shop 1
The reason why two places, 8 and 20 are used, is that one place cannot perform sufficient rearrangement. The vehicle body S paid out from the paint stocking area 20 is temporarily stored in the vehicle assembly stocking area 21 and then sent to the vehicle assembly process. The car assembly stocking area 21 is capable of storing about 100 vehicle bodies and serves as a buffer for paying out vehicle bodies.By providing the buffer function, it is possible to reduce parts procurement time for engines and the like in the vehicle assembly process. It is designed to cope with fluctuations in the amount of money earned or processed in the vehicle assembly process. In addition, electrodeposition knights 22,
The sealer night 23, the middle coating night 24, and the top coating night 25 are tracks configured to circulate the vehicle body, and are used at night or the like. In the painting process, if the car body stays in one place for a long time, defective products will be generated, so it is necessary to keep the car body moving at all times.When the regular line stops at night etc., transfer the car body to a normal line , And enter each of the nights 22 to 25, and wait in the night. Each hanger conveyor (not shown) provided on the painting line has a hanger for loading a vehicle body S as shown in FIG.
Many hanger 30 are attached, and hanger 30 circulates in a hanger conveyor. In addition, hanger 30
The hanger plate 31 is attached to the
Eight windows are set in 31 as shown in FIG.
Each of the eight windows is weighted as “1”, “2”, “4”, “8”,... So that a predetermined identification code is represented depending on whether the window is open or closed. The identification code is unique to the hanger and the same value is not set. The identification code is read by the hanger reader 32 as shown in FIG. The hanger reader 32 is a charging section for each hanger conveyor,
The tip of the hanger plate 31 is disposed at a predetermined position such as on the vehicle carrying side of the paint stocking area 18 and the photoelectric tube shown in FIG.
29, and the opening / closing of each window is detected at this timing. Here, the paint stocking area 18 is provided with an automatic carry-in lane having a standby lane for storing a hanger for loading a poorly-painted vehicle and a hanger for loading a vehicle without an engine, and an automatic unloading lane. The hanger loaded with the vehicle body subjected to various inspections at the
Is carried into the automatic carry-in lane, the carrying order is adjusted, and then carried out to the wax processing section 19 from the automatic carry-out lane. The control of loading / unloading of the vehicle-mounted hanger will be described with reference to FIG. 4. The hanger reader 32 disposed near the vehicle loading side of the coating stock site 18 is provided with a vehicle-mounted hanger that is carried in from the inspection unit 15. When the identification code is read from the plate, the read identification code is transferred to the sequencer 33. Further, the sequencer 33 outputs the identification code,
When transferred to the computer 34 for controlling the transfer order of the vehicle-mounted hangers in the paint stocking area 18, the computer 34
Based on the identification code, it is determined whether the coating of the hanger loaded vehicle body is defective or parts such as an engine mounted on the hanger loaded vehicle body have not been procured in the car assembly process. The data is sent to a conveyor control panel 35 that controls the conveyor of each lane. The conveyor control panel 35 is operated by a conveyor based on a command from the computer 34.
By controlling 36, the vehicle-volume hanger carried into the coating stocking area 18 is distributed or sent to the automatic carry-in lane or the standby lane, while the vehicle-volume hanger carried into each lane is carried out or sent from the automatic carry-out lane. It has become. In this case, the standby lane temporarily stores a hanger loaded with a poorly painted vehicle body or a hanger loaded with a vehicle body in which parts such as an engine have not been procured in a vehicle assembly process. Further, in the automatic loading lane, a normal vehicle volume mounting hanger is temporarily stored in order to perform rearrangement for efficiently dispensing to the vehicle assembly process. Further, the memory of the computer 34 is configured to sequentially store the number of storage hangers, the number of storage hangers, and the number of unloading hangers sorted by the conveyor control panel 35 in the automatic loading lane and the standby lane. Next, the transfer order control according to the present embodiment having the above-described configuration is performed in the fifth order.
Explanation will be given based on FIG. 6 and FIG. ◎ Carry-in hanger carry-in process (Fig. 5) The computer 34 that controls the transfer order of the car-volume hanger carried into the coating stocking area 18 is provided by the painting stocking area.
Based on the presence / absence of a detection signal from the hanger reader 32 near the loading side of 18, it is determined whether or not there is a loading hanger to the coating stock shop 18 (step SA1). If there is no loading hanger, the control operation is not performed. (Step SA2) If there is a carry-in hanger, it is determined whether or not the carry-in hanger is an actual hanger, that is, whether or not a vehicle body is loaded on the carry-in hanger (step SA2).
3). If the loading hanger is not a real hanger but an empty hanger,
While the empty carry-in hanger is forwarded as unacceptable (step SA4), if the carry-in hanger is a real hanger, the computer 34 determines whether or not the automatic carry-in lane of the coating stock shop 18 is full of hangers (step SA5). ). If all of the automatic loading lanes are full, the loading hanger is forwarded as unloadable (step SA6), while if there is a vacancy in the automatic loading lane, the computer 34 performs loading based on the hanger plate identification code of the loading hanger. It is determined whether the hanger loading vehicle body is a vehicle body with poor paint / engine not procured or a normal vehicle body (step SA7). If the loading hanger loading vehicle body is a vehicle body with poor paint / engine not procured, it is determined whether or not there is an empty space in the standby lane of the paint stocking area 18 (step SA8). A carry-in instruction is sent to the conveyor control panel 35, and a carry-in hanger loaded with a poorly-painted vehicle body / an unprocured vehicle body is carried into the standby lane (step SA9). The hanger is forwarded (step SA10). On the other hand, if the carry-in hanger loading vehicle body is a normal vehicle body in step SA7, the computer 34 determines whether or not all the automatic carry-in lanes are empty (step SA11). Sends a carry-in instruction to the conveyor control panel 35 and carries a carry-in hanger loaded with a normal vehicle body into a predetermined automatic carry-in lane (step
SA12). On the other hand, if all the automatic loading lanes are not empty, the computer 34 searches for an empty automatic loading lane for each lane (step SA13). In this case, steps SA13 ~
The processing up to step SA24 to be described later forms a loop, and the processing is performed for each lane in ascending NO order. Next, the computer 34 determines whether or not there is an empty automatic carry-in lane having all empty positions (step SA14).
While the corresponding lane NO is stored in the memory (step SA
15) If not, it is determined whether or not the vacant automatic carry-in lane NO having all vacant positions is the standby lane and the lane corresponding to the painting-defective vehicle body / engine unpurchased vehicle data (step SA16). If the lane satisfies the condition, the control operation is not performed (step SA17). If the lane does not satisfy the condition, it is determined whether or not the lane is full (step SA18). Although not performed (step SA19), if it is not full, it is determined whether the last hanger of the lane is an empty hanger (step SA19).
20). If the last hanger of the lane is an empty hanger, the computer 34 sets the empty number to "1" and stores the empty number / lane NO in the memory (step SA21). In this case, only when the empty number stored in the memory is “0”, the empty number / lane
Remember NO. On the other hand, if the last hanger is not an empty hanger, the computer 34 determines whether or not the carry-in hanger and the last hanger are the same model (step SA22). It is determined whether or not the derivations are the same (step SA23). If the derivations are the same, the lane NO is stored in the memory and the loop is terminated (step SA24). If the derivations are not the same, the number of empty hangers / The lane NO is stored in the memory (step SA25). In this case, when the number of available lanes is larger than the number of available lanes stored in the memory, the number of available lanes / lane NO is stored. On the other hand, if the carry-in hanger and the last hanger are not the same model in step SA22, the empty number / lane NO is stored in the memory (step SA26). In this case, when the number of available lanes is larger than the number of available lanes, the number of available lanes / lane NO is stored. After the processing in step SA24, the computer 34 determines whether or not there is a lane for storing hangers of the same model and the same type (step SA27), and if there is a corresponding lane, sends a carry-in instruction to the conveyor control panel 35. While storing the incoming hanger in the same model and the same derived lane (step SA
28) If there is no corresponding lane, it is determined whether there is a lane for storing a hanger of the same model (step SA29). If there is a corresponding lane, a carry-in instruction is sent to the conveyor control panel 35 and the same model is sent. The loading hanger is stored in the lane (step SA30). On the other hand, if there is no lane for storing the same type of hanger in step SA29, the computer 34
Determines whether there is an empty lane (step SA31), and if there is an empty lane, sends a carry-in instruction to the conveyor control panel 35 to store the carry hanger in the lane (step SA32), but there is no empty lane. Conveyor control panel 35
The carry-in instruction is sent to the lane, and the carry-in hanger is stored in the lane stored in the memory (step SA33). ◎ Car Hanger Unloading Process (Fig. 6) The computer 34 determines whether the head of all the automatic unloading lanes of the paint stocking area 18 is an empty position or the absence of a hanger (step SB1), and the head of all lanes. If the vehicle is empty or the hanger is absent, the control operation is not performed (step SB2). However, if there is a vehicle-volume hanger at the head of all lanes, poorly painted body / parts are not at the head of the standby lane of all lanes. It is determined whether the procured vehicle mounted hanger is present and whether or not the hanger is to be forwarded (step SB3). If the hanger with a poorly-painted car body / parts whose parts have not been procured is present and is to be forwarded, the computer 34 sends a forwarding instruction to the conveyor control panel 35 to forward the hanger from the standby lane to the forwarding lane (step SB4). ), If there is no hanger with unpainted body / parts unpurchased vehicle volume hanger, check if the same hanger as the model / derivation that was previously instructed to be unloaded is in the automatic unloading lane (Step SB5) (Step SB6). If the same hanger as the model / derivation that was previously instructed to be unloaded is in the automatic unloading lane, the computer 34 sends an unloading instruction to the conveyor control panel 35 to unload the corresponding hanger from the lane and store it in the memory so far. Is incremented (step SB7). On the other hand, if the same hanger as the model / derivation that was previously instructed to be unloaded is not in the automatic unloading lane, the computer 34 determines whether or not the same hanger as the model that was previously unloaded is in the automatic unloading lane (step SB8). Conveyor control panel 35 if at the top
And sends the corresponding hanger from the relevant lane and increments the number of the previous hangers stored in the memory (step SB9), but if not at the top, five hangers of the same model / derived The lanes that can be continuously unloaded are searched from the automatic unloading lanes (step
SB10) Determine whether or not there is a hanger of the same model or derivative that can continuously carry out 5 or more vehicles at the head of the lane (step SB1)
1). If five or more consecutive hangers of the same model or derivative that can be continuously unloaded are at the head of the lane, the computer 34 sends an unloading instruction to the conveyor control panel 35, and unloads the hangers from the lane and stores them in memory. Is set to "1" (step SB12). If there are no hangers of the same model or derivative at the head of the lane that can be continuously output by five or more vehicles, the computer 34 selects lanes that can be continuously output by five or more hangers of the same model from the automatic export lanes. A search (step SB13) determines whether or not five or more hangers of the same model that can be carried out are at the head of the lane (step SB14). If there is, a carry-out instruction is sent to the conveyor control panel 35, and from the corresponding lane. Unload the corresponding hanger and set "1" to the number of unloads stored in the memory (step SB15). If there is no hanger, load the unpainted vehicle / part unpurchased vehicle at the head of the automatic unloading lane excluding the standby lane. A hanger is searched for (step SB16), and it is determined whether or not there is a corresponding hanger (step SB17). If there is a corresponding hanger, the computer 34 is the conveyor control panel 35
While the carry-out instruction is sent to the corresponding lane to forward the corresponding hanger to the forwarding lane (step SB18), if there is no corresponding hanger, the carry-out is determined to be impossible and the corresponding hanger is forwarded to the standby lane (step SB19).

【The invention's effect】

As described above, according to the present invention, the following effects can be obtained. Transporting means for loading unsatisfactory workpieces / Transporting means for loading non-procured workpieces in the post-process (car assembly process, etc.) to the standby lane, and transporting the transport means for loading normal workpieces to the normal lane once to wait. Since the transfer order of each transfer means is adjusted, the efficiency of various operations such as a car set in a post-process can be improved. When transporting the transporting means to the normal lane and storing the transporting means, the transporting means storing the work of the same model is loaded and stored collectively, and further, when the transporting means is unloaded, the transporting means stored in the lump is stored. Since the means is preferentially carried out, the vehicle body (work) can be efficiently delivered to the post-process, for example, the vehicle assembly process, and the production efficiency can be greatly increased. As described above, it is possible to automate the transfer order adjustment of each transfer unit on which the work is loaded, so that it is possible to achieve efficient production management in the vehicle production factory.

[Brief description of the drawings]

FIG. 1 is a schematic view of a coating line of a vehicle production plant according to an embodiment of the present invention, FIG. 2 is a schematic view of a hanger conveyor of this embodiment, FIG. 3 is a front view of a hanger plate of this embodiment, FIG.
FIG. 5 is a schematic block diagram of the transport order control system of the present embodiment, FIG. 5 is a matrix diagram for explaining the vehicle-volume hanger loading process of the present embodiment, and FIG. 6 is a vehicle-volume hanger unloading process of the present embodiment. It is a matrix diagram for description. 18 ... Painting stock area (normal lane, standby lane, transfer order adjustment lane), 30 ... hanger (transportation means), 31 ...
Hanger plate, 32 ... Hunger reader (detection means), 33
…… Sequencer, 34 …… Computer (determination means, transfer control means), 35… Conveyor control panel, 36 …… Conveyor.

Claims (1)

(57) [Claims] In an automatic line configured to sequentially transport a plurality of works and perform various processes such as painting and assembling, the automatic lines are arranged corresponding to the respective works, and identification information of the works is provided. A normal lane which is provided in the middle of the automatic line and temporarily stores a transfer means for loading a normal work which is transferred from the coating process, and a defective paint work. Or, a transfer order adjustment lane provided with a standby lane for temporarily storing transfer means for loading unloaded workpieces in a post-process, and disposed on a transfer means loading side of the transfer order adjustment lane,
Detecting means for detecting the presence / absence and identification information of the transfer means on the loading side of the transfer order adjustment lane; and, based on the detection result by the detection means, whether the transfer means conveyed to the transfer order adjustment lane is loaded with a normal paint work. Determining means for determining whether a paint defective work or a component unprocured work is loaded; and, if the determining means determines that the transfer means conveyed to the transfer order adjustment lane is determined to be a paint normal work load, the transfer means is referred to as If the transport means transported to the transport order adjustment lane is determined to be loaded with a paint defective work or a component unpurchased work while being transported to the normal lane and stored, the transport means is transported to the standby lane and loaded. Control means, when the transport means is carried in and stored in the normal lane. A plurality of the normal lanes, carrying-in processing means for carrying and storing the transporting means to a normal lane in which a work of the same model as the work to be loaded and transported by the transporting means is stored, and stored in the normal lane. And an unloading processing means for preferentially unloading the transfer means from a normal lane in which a plurality of works of the same model are stored when a plurality of works of the same type are unloaded.