JPH0767623B2 - Car body parts transportation method - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrying method suitable for carrying a plurality of works and a vehicle body part assembled from them in a positioned state and carrying them. .

(Prior Art) A method for holding and carrying a vehicle body part in a positioned state has been conventionally disclosed, for example, in Japanese Patent Application Laid-Open No. 62-110581, and in this method, each wrist is placed on a carrying carriage. Is provided with work positioning means composed of a plurality of three-degree-of-freedom Cartesian coordinate robots having work receiving members as work holding means, and the work positioning means holds the body parts in a positioned state, and the carrier cart in the held state. The vehicle body parts are brought into the vehicle body assembly place by driving and are positioned there. Therefore, it is not necessary to provide the vehicle body parts with the positioning means at the vehicle body assembly location, and further, it is not necessary to transfer the vehicle body parts to the vehicle body assembly location positioning means.

By the way, since the body parts are usually assembled by joining a plurality of works to each other in a positioned state, each of the plurality of works constituting the car body part should be held in a positioned state by the work positioning means on the transport carriage. In that case, it is not necessary to provide a positioning means even at the assembly place of the body parts, and further, it is also troublesome to transfer the work and the assembled body parts between the carriage and the positioning means at the assembly place of the body parts. I can omit it.

(Problems to be Solved by the Invention) However, if the conventional transporting method is used to perform positioning of a work forming a vehicle body component as described above, all work positioning means are integrally configured. , The robots etc. for which the positioning and holding of the workpieces are no longer needed after the assembly of the body parts are moved to the vehicle body assembly place by the carrier, and are placed there. Therefore, the free space at the vehicle body assembly place is reduced. Narrowed to prevent the operation of welding equipment such as welding robots,
A robot having a work receiving member that is originally unnecessary at a vehicle body assembly site is moved to a vehicle body assembly site, and during that time, these robots cannot be used for other purposes, resulting in waste of equipment.

The present invention provides a method of transporting vehicle body parts that advantageously solves the above problems.

(Means for Solving the Problem) A method for transporting a vehicle body component according to the present invention is directed to a plurality of workpieces and a vehicle body component assembled from the workpieces by using a transport carriage equipped with a workpiece positioning means having a plurality of workpiece holding means. When holding and transporting in a positioning state, the transport carriage is equipped with two work positioning means that can hold the plurality of works in a positioned state by being combined with each other, and the plurality of works in the positioned state. After assembling the vehicle body parts by joining them to each other, one of the two work positioning means that can hold the vehicle body parts in the positioned state is left on the transport carriage and the other is separated from the transport carriage. It is characterized by that.

Further, the transport carriage of the present invention used in the above-mentioned transport method is equipped with two work positioning means which can be combined with each other to hold the plurality of works in a positioning state, and of the two work positioning means, One work positioning means capable of holding the vehicle body parts assembled from a plurality of works in a positioned state is left, and the other work positioning means can be separated from the transport carriage.

(Operation) In such a method, by using two work positioning means in combination, a plurality of works are held in a positioned state and conveyed to an assembly place of a vehicle body part, and those works are assembled at the assembly place. After assembling the vehicle body parts by joining them to each other, one of the workpiece positioning means holds the vehicle body part in a positioned state, and the other workpiece positioning means is separated from the transport carriage.

Therefore, according to the present invention, when the carrier truck is moved to the vehicle body assembling place and the vehicle body parts are positioned by the workpiece positioning means on the carrier truck, unnecessary work positioning means is not disposed there, so It is possible to secure a sufficient working space for the body parts joining equipment at the assembly site,
At the same time, the unnecessary work positioning means can be used immediately for assembling vehicle body parts by combining it with other work positioning means without leaving it idle, and it is possible to prevent waste of equipment.

Embodiment An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 4 is a schematic diagram showing a layout of an assembly line of an automobile body to which an embodiment of the method for carrying in vehicle body parts according to the present invention is applied, in which 1 is a left hood ridge subline and 2 is a left hood ridge subline.
Is a dash lower subline, 3 is a radiator core support subline, 4 is a right hood ridge subline, 5 is a front floor subline, and 6 is a rear floor subline.

In this vehicle body assembly line, the radiator core support, the left and right hood ridges, and the dash lowers, which are the vehicle body parts assembled in the above sublines 1 to 4, are assembled to the engine compartment assembly stage 7 and joined to each other to assemble the engine compartment. , The engine compartment and the front floor and the rear floor, which are the vehicle body parts assembled in the sub-lines 5 and 6, are assembled into the floor main assembly stage 8 and joined to each other there to assemble the floor main, and then the floor main. The spot welding is additionally performed on the floor main increasing stage 9 arranged in parallel at five positions.

On the other hand, in the figure, 10 is the roof panel subline, 11 is the parcel shelf subline, 12 is the air box subline, and 13 is the airbox subline.
Is a rear panel sub line, 14 is a left body side sub line, and 15 is a right body side sub line.
The roof panel, parcel shelf, air box, rear panel, and left and right body sides, which are the vehicle body parts assembled in 15, are collected together with the above-mentioned floor mains to the body main assembly stage 16 which is the vehicle body assembly place, and joined together there. By doing so, the body main that roughly constitutes the vehicle body is assembled, and then the spot welding of the body main is additionally performed on the body main increasing stage 17 arranged in five places.

Here, each of the above sub-lines is, for example, as shown in FIG. 5 for the left hood ridge sub-line 1 and as shown in FIG. 6 for the front floor sub-line 5, for example.
Type switching stage 21, work receiving stage 22,
In addition to the assembly stage 23 and the delivery stage 24, one or more units each of which autonomously travels along a loop-shaped path as shown by A to L in FIG. It comprises a number of carrier vehicles 25.

In this embodiment, the transport carriages 25 arranged on the respective sub-lines determine the traveling direction by detecting the guide tapes laid along the respective routes on the floor surface with, for example, an optical sensor and operate the guide tapes. The steering mechanism for steering the wheels and the drive mechanism for driving the drive wheels by operating the motor by the battery built in the carriage 25 can be autonomously traveled along each of the paths, and each of the stages It has a transceiver that sends and receives radio signals to and from each stage, and when the truck approaches each stage, it stops at a predetermined position on each stage based on the signal transmitted by those stages, and each stage works there. It can start based on the signal output after the end, and further has a forward detection device that detects the front with the ultrasonic transceiver at the front end of the carriage 25, and there is an obstacle on the path or another carrier When or caught up with 25, the obstacle is removed, or can be the front of the bogie is suspended until the start. (Since such a trolley is well known, illustration of each mechanical device is omitted.) Further, on each transport trolley 25, a work positioning device 26 as a work positioning means for positioning and holding a work and an assembled body part. The work positioning device 26 in this case is of a type that holds the work and the vehicle body parts below the work parts, such as one for the rear floor, as shown in FIG. A reciprocating mechanism of each three-degree-of-freedom Cartesian coordinate type robot is mounted on a base that is fixed on the top or is positioned so as to be separable by a locating pin (not shown) that is erected there. A work receiving member 30 as a work holding means is provided through a moving mechanism 29 in which one end of a flexible shaft (product name) 28 is coupled to the ball screw shaft instead of the servo motor. Support and composed.

The base 27 also has, on its side, a switching type having three output shafts 32 selectively coupled to one input shaft 31 via three electromagnetic clutches and a gear mechanism (not shown). A drive input mechanism 33 is provided, and three output shafts 32 thereof are respectively coupled to the other end of the flexible shaft 28. In this case, the drive input mechanism 33 drives one input shaft 31. The work receiving member 30 can be three-dimensionally moved to an arbitrary position by selectively rotating the ball screw shafts of the moving mechanism 29 as appropriate (for details, refer to, for example, the application by the present applicant). 62-187087).

Then, the input shaft 31 is driven by a switching type drive device 34 provided in the type switching stage 21 in this embodiment, and this driving device 34 positions the work on the transport carriage 25 that has arrived at the type switching stage 21. A servo motor shift mechanism 36 for selectively aligning one servo motor 35 with respect to each drive input mechanism 33 of the device 26, and moving the servo motor 35 forward and backward with respect to the drive input mechanism 33, and the output shaft of the servo motor. And an engaging / disengaging mechanism 38 for driving an air cylinder, which engages and disengages the input shaft 31 via a coupling 37.

The servo motor engaging / disengaging mechanism 38 also attaches / detaches the connector 39 provided on the drive input mechanism 33 side to the servo motor 35 side, and the connector 39 is provided at the coupling portion between each flexible shaft 38 and the ball screw. The rotary encoder 40 with an electromagnetic brake that is released only when electricity is energized, and the brake control circuit and encoder signal circuit are switched together with the control circuit for each electromagnetic clutch of the drive input mechanism 33. It is connected to the control panel 41 of the device 34.

The control panel 41 of the above-mentioned switching type drive device 34 operates according to a program inputted in advance, and when the carrier vehicle 25 approaches the type switching stage 21, it transmits a radio signal to stop the carrier vehicle 25 and causes the carrier vehicle 25 to move to the stage. At a predetermined position, and then the servo motor shift mechanism 36 is operated to drive the servo motor 35 to any one drive input mechanism 33.
Then, the servomotor engagement / disengagement mechanism 38 is operated to advance the servomotor 35 and the connector 39 so that the output shaft of the servomotor is engaged with the input shaft 31 via the coupling 37 and the connectors 39 are connected to each other. Then, the brakes of the rotary encoders 40 are released, and the clutches of the switchable drive input mechanism 33 are sequentially and selectively coupled to each other, and the reciprocating movement mechanisms of the moving mechanism 29 that can be driven by the coupling are connected. Is directly fed back from the output signal of the rotary encoder 40 and the rotation amount of the ball screw to the servo motor.
It is operated by a predetermined amount by 35, and as a result, one moving mechanism
29 is three-dimensionally operated to dispose the work receiving member 30 provided therein at a predetermined position. After each reciprocating mechanism has actuated by a predetermined amount, each ball screw shaft is stopped by the electromagnetic brake of the encoder 40, and the work receiving member is stopped.
Fix 30 to the above position, then remove the servo motor
The servo motor 35 and the connector 39 are retracted by the 38 to separate the coupling 37 and the connector 39 from each other, and then the servo motor shift mechanism 36 moves the servo motor 35 toward the next drive input mechanism 33.

By repeating this procedure and arranging all the work receiving members 30 at relative positions suitable for positioning and holding a plurality of works constituting the vehicle body part to be assembled next, the control panel
41 outputs a radio signal instructing the vehicle to start, and receives the carrier 25 to start it toward the stage 22.

In FIG. 7, only two moving mechanisms 29 and two drive input mechanisms 33 for driving the moving mechanisms 29, and only one servo motor 35 and one servo motor shift mechanism 36 and one servo motor engaging / disengaging mechanism 37 for moving the servo motors 35 are used. Although shown, the moving mechanism 29 and the drive input mechanism 33 are provided on the base 27 by the number required to hold the work, and the servo motor 35, the servo motor shift mechanism 36, and the servo motor engaging / disengaging mechanism 37 are also provided. For example, a larger number may be provided, such as being provided on both sides of the base 27.

Further, the moving mechanism 29 may be provided with a rotating mechanism or the like as required to increase the degree of freedom of movement.

Furthermore, a tank for pressurized air is mounted in the carrier 25 as required, and a moving mechanism for the work positioning device 26 is also installed.
An unillustrated clamp mechanism for driving an air cylinder is provided on the 29 as required, and the carrier truck 25 operates an air valve based on a signal transmitted from each stage to supply air pressure from the tank. The clamp mechanism causes the work holding member 30 to be fixed and released.

Therefore, the work positioning device 26 can position and hold a plurality of works such as the work 42 constituting the rear floor 67 shown in FIG. 7 at a relative position when they are joined to each other, Also type switching stage 21
The arrangement of the work holding member 30 of the work positioning device 26 can be changed according to different types of vehicle body parts to be assembled next, such as sedan type and hard top type.

In the left hood ridge sub-line 1 shown in FIG. 5, however, the transfer carriage 25 having the base 27 of the work positioning device 26 erected upright circulates along the route A. Here, as described above, Then, when the transport carriage 25 whose arrangement of the work receiving member 30 is changed at the type switching stage 21 arrives at the predetermined position of the next receiving stage 22, the loading robot 43 is mounted on the work positioning device 26, and the loading robot 43 Work shelves 44 in which works constituting the left hood ridge 61, for example, a panel and a frame, are divided according to types of vehicle body parts.
Picked up from and placed on, the carriage 25 receives a signal from the stage instructing to start after the placement is finished,
The work is moved toward the next assembly stage 23 while the work is fixedly held by the work positioning device by the clamp mechanism.

When the carriage 25 arrives at the predetermined position of the assembling stage 23 and, as a result, a plurality of works are positioned and fixed at the predetermined relative position and at the predetermined position of the stage, the welding robot 45 here performs spot welding. The gun 46 is used to join the plurality of workpieces to each other by spot welding to assemble the left hood ridge 61, and when the carrier truck 25 receives a signal from the stage instructing to start after the assembly is completed, the next delivery is performed. Move towards stage 24.

Delivery stage 24 of this left Hood Ridge Subline 1
In this embodiment, it also serves as the engine compartment assembly stage 7. The engine compartment assembly stage 7 also serves as the delivery stage 24 for the right hood ridge subline, the dash lower subline and the radiator core support subline.

That is, the engine compartment assembly stage 7
Position the right hood ridge 62, the dash lower 63, and the radiator core support 64 assembled in the same manner as in the left hood ridge subline 1 on each of the right hood ridge subline 4, the dash lower subline 2 and the radiator core subline 3. Three carrier trucks to hold
25 assembles together with the transport carriage 25 for positioning and holding the left hood ridge 61 so as to surround one empty transport carriage 25, and positions and fixes each of the vehicle body parts on the empty transport carriage 25.

Then, at this stage 7, the welding robot 45 having the welding gun 46 moves the left and right hood ridges 61 and 62 and the dash lower 6
3 and the radiator core part 64 are spot-welded to each other to assemble the engine compartment 65.After that, the four surrounding carriages 25 each release the car body parts they have carried and the sub line to which they belong. On the other hand, while returning to the type switching stage 21, the central transport carriage 25 holds the engine compartment 65 in a positioned state and transports it to the floor main assembling stage 28 along the looped route M shown in FIG. .

The assembly and the discrete order of the transport carriages 25 in the engine compartment assembly stage 7 is such that the control board 51 provided adjacent to the stage 7 is arranged so that the carriages and the body parts do not interfere with each other. It is controlled appropriately by a radio signal. That is, for example, a direction in which the empty carriage 25 is first arranged at a predetermined receiving position indicated by reference numeral 52 in FIG. 4, and then the carriage 25 holding the radiator core support 69 is directed to the floor main assembly stage 8. The empty carrier truck 25 is arranged on the delivery stage 24 in front of the empty carrier truck 25, and then the carrier trucks 25 holding the left and right hood ridges 61, 62 are transferred to both sides of the empty carrier truck 25.
Placed at the end and holds the dash lower 63 at the end 25
Is placed on the delivery stage 24 on the rear side of the empty carrier.

As shown in FIG. 6, on the floor main assembly stage 8, in addition to the carrier truck 25 holding the engine compartment 65, the carrier truck 25 holding the front floor 66 assembled in the front floor subline 5 and the rear floor subline. The carrier trucks 25 holding the rear floor 67 assembled in 6 gather together, and again, these three carrier trucks
The engine compartment 65, the front floor 66, and the rear floor 67 are positioned and fixed in a predetermined relative position by aligning the 25 with each other at a predetermined position. Assemble the floor main 68 by spot welding to.

Then, after that, the transport carriage 25 that has transported the front floor 66 is left first, and the transport carriage 25 that has transported the engine compartment 65 releases it, and then along the route M, the engine compartment assembly stage 7 To the receiving position 52 of the rear floor 67, the carriage 25 that has transported the rear floor 67 returns to the type switching stage 21 of the rear floor subline 6 along the route F, and then the front floor.
The trolley 25 that carried 66 is the assembled floor main
68 is conveyed to the next floor main re-increase stage 9.

The floor main boosting stage 9 is provided in five places because the number of spot welding spots is extremely large and it takes a lot of work time. The carrier truck 25 holding the floor main 68 is
According to the signal transmitted from the vacant stage 9, it enters there and stops at a predetermined position. And the welding robot 45
When the additional spot welding by the above is completed, the carriage 25 is moved to the body main assembly stage as shown in FIG.
Move to 16.

On the other hand, in the roof panel sub-line 10, the parcel shelf sub-line 11, the air box sub-line 12 and the rear panel sub-line 13, as in the left hood ridge sub-line 1 described above, the carrier truck 25 circulates to assemble each body part. And these sublines 10-13
In, the assembly stage 23 is used together with the delivery stage 24.

Further, in this embodiment, an overhead conveyor as shown in FIG. 8 which autonomously runs along a path N passing above the sub-lines 10 to 13 and the body main assembly stage 16.
The conveyor 53 is provided with a moving mechanism 29 similar to that of the work positioning device 26, which is provided below the slender traveling vehicle 54 including a drive motor, wheels, a traveling control device and the like (not shown). Via a plurality of work receiving members 30 and a clamp mechanism (not shown), and also by the drive input to the switching type drive input mechanism 33 similar to that of the work positioning device 26, each work receiving member 30 and the clamp mechanism. The moving vehicle 54 can be moved three-dimensionally to any position.

Thus, as shown in FIG. 4, the overhead conveyor 53 is provided with a switching type driving device of the type switching stage 21 similar to that of each sub-line, which is provided in the vicinity of the path N, so that each work receiving member 30 can be operated. After changing the arrangement according to the type of vehicle body parts to be held next, the sub-lines 10 to 13 are sequentially passed through, and the sub-lines convey the assembly / delivery stages 23 and 24 by the drop lifter. A roof panel 69 having front and rear roof rails, a parcel shelf 70, an air box 71, and a rear panel 72, which are descended onto the trolley 25 and are respectively assembled in these sub-lines, are sequentially and in a predetermined relative position during vehicle body assembly. The work receiving member 30 and the clamp mechanism hold the workpieces in a positioned state so that they are located in the respective positions. Stand to travel to the stage 16.

When the overhead conveyor 53 reaches the body main assembly stage 16, the drop conveyor 55 lowers the overhead conveyor 53 to a predetermined position above the floor main 68 as shown in FIG. Position and fix it in place.

The left and right body side sub-lines 73, 74 assembled in the left and right body side sub-lines 14, 15 are carried into the body main assembly stage 16, and the left and right body side sub-lines 14, 15 are respectively shown in FIG. As shown, in addition to the type switching stage 21, there are two work receiving stages 22 and two assembling stages 23 for the inner panel and the outer panel, and the body main assembling stage 16 and the floor main 68 on both sides of the carry-in position. The transfer stage 24 is provided adjacent to the transfer stage 24, and the transfer stage 24 is provided with a coupling stage 86 between the transfer stage 24 and the type switching stage 21.
And a second assembling stage 23, a separating stage 87 is provided, and further, the combining stage 86 and the separating stage 87 are provided.
It is equipped with conveyor lines R and S, which are laid between and, for example, by a slat conveyor or the like.

Here, for example, the right body side sub-line 15 will be described.
As shown in the drawing, a support arm that is rotated by a bracket provided on the side surface of the transport carriage 25 and a rotating means (not shown).
On the 88, another work positioning device 89 transferred by the conveyor line S is transferred so as to be fitted and coupled with the work positioning device 26 previously mounted on the transfer carriage 25. The transfer is performed by, for example, a robot or the like (not shown) provided at the end of the conveyor line S.

Further, in the separation stage 87, after the support arm 88 is once rotated downward, the other work positioning device 89
3 is separated from the work positioning device 26 preliminarily mounted on the transfer carriage 25, lifted from the transfer carriage 25, transferred to the start end of the conveyor line S, and transferred. The mounting is also performed, for example, by a robot or the like (not shown) provided at the start end of the conveyor line S.

Then, the transport carriage 25 travels with the two work positioning devices 26 and 89 mounted from the combining stage 86 to the separating stage 87, but from the separating stage 87 to the combining stage.
Up to 86, only one work positioning device 26 is mounted for traveling, and the conveyor line S has a work positioning device 89.
Is sent from its starting end to its terminating end.

This transfer method is also performed for the left body side sub-line 14, and according to this method, a plurality of works are received and they are joined in a positioned state, and the left and right body sides 7 are joined.
Until you assemble and assemble 3,74, two positioning devices 2
With a large positioning device that combines 6,89, many positions can be positioned and the positioning accuracy between workpieces can be maintained sufficiently high.
When arranging the 3,74 at a predetermined position with respect to the floor main 68, etc. on the delivery stage 24, by holding only the vicinity of the strong side sills of the body sides 73,74, the delivery stage 24 and eventually the body main assembly stage It is possible to provide enough space for the assembly work of those body sides 73, 74 at 16 to facilitate the work.

Then, in the left and right body side sublines 14 and 15, respectively, the left and right body sides 73 and 74 assembled from the inner panel and the outer panel of the front pillar portion, the center pillar portion, the side roof rail portion, the side sill portion, the rear fender portion, etc. Each of them is carried by the carriages 25 to positions on both sides of the floor main 68, which is the delivery stage 24 of those sub-lines, and fixed in a positioned state there as shown in FIG.
8. The welding robot 45 joins the left and right body sides 73, 74 and the roof panel 69, the parcel shelf 70, the air box 71, and the rear panel 72, which are fine articles, to each other by spot welding to assemble the body main.

On the other hand, another work positioning device 89 separated by the separation stage 87 is sent to the combining stage 86 via the conveyor lines R and S, and is equipped with the work positioning device 26 that has been previously combined. Without waiting for the carriage 25 to return from the transfer stage 24 to the combination stage 86, the body side 73, 74 has already been transferred on the transfer stage 24 and is returning to the combination stage 86, or is returning. It is transferred onto another transporting carriage 25 and is connected to the work positioning device 25 mounted therein.

Therefore, according to the above-described transfer method, another work positioning device 89 unnecessary for the delivery stage 24 and thus the body main assembly stage 16 is immediately passed without passing through the delivery stage 24 and uselessly waiting until the end of the work there. Since it can be used for positioning and holding the next work, it is possible to improve the operating rate of the work positioning device 89 and prevent waste of equipment.

Incidentally, the arrangement for assembling the left and right body sides 73, 74 in the body main assembly stage 16 is such that one end of the work positioning device 26 is mounted on the transfer carriage 25 by an erection device (not shown) operated by an air cylinder. This can be easily performed by rocking and standing at the fulcrum.

Then, in the body main assembly stage 16, the overhead conveyor 53 first releases the vehicle body parts, and then is lifted by the drop lifter 55 and returns to the type switching stage 21 along the route N again. Transporting cart 25 that transports 73,74
Also returns to the separation stage 87 of the left and right body side sublines 14 and 15, respectively, and then the carrier truck 25 that has carried the front floor 66 carries the assembled body main to the next body main hitting stage 17.

Similarly to the floor-main overfilling stage 9, the body-main overblanking stage 17 has five spots for spot welding, which requires a long working time. Therefore, the carrier cart 25 for holding the bodymain is vacant. Stage 17
After entering and stopping at a predetermined position, and when the welding robot finishes hitting, the body main is conveyed to a transfer stage (not shown) and the body main is delivered to a drop lifter (not shown). As shown, the process returns to the type switching stage 21 of the front floor sub line 5 along the route E.

As described above, according to the car body assembly line here, car body parts are assembled from a plurality of works in each sub line,
You can assemble those body parts to assemble the body main.

FIG. 9 and FIG. 10 show the above-mentioned sub lines 1 to 6, 10 respectively.
Each stage 21 to 24 in ~ 15, engine compartment assembling stage 7, floor main assembling stage 8, floor main assembling stage 9, body main assembling stage 16, body main assembling stage 17, and not shown body main delivering stage 9 shows a concrete example of a method for positioning and fixing the work positioning device 26, and by extension, the work or the like positioned and held therein at a predetermined position. In the example shown in FIG. When the arrival is detected, the lifter 81 is lifted from the floor below the carriage 25 as shown by the arrow, and the locating pin 82 erected there is fitted in the locate hole provided on the bottom surface of the transport carriage 25 and the lifter is also fitted. 81 with carrier
25, the work positioning device 26 is positioned and fixed together with the transfer carriage 25. In the example shown in FIG. 10, when the sensor 80 detects the arrival of the transfer carriage, the lifters are moved from both sides of the transfer carriage 25.
83 is raised as shown by the arrow, and the locate pin 84 erected there is provided on the back surface of the base 27 of the work positioning device 26 detachably mounted on the carriage 25 as described above. The work is fitted into the locate hole, and the lifter 83 lifts only the work positioning device 26 to position and fix it.

According to the method shown in FIG. 9, since the work positioning device 26 can be integrated with the transfer carriage 25, the structure of the transfer carriage 25 can be simplified, and according to the method shown in FIG.
Since the posture of the work positioning device 26 can be easily changed,
It is possible to easily change the postures of the work and vehicle body parts in the positioned state so that the work on each stage is easy.

FIG. 11 shows another example of a carrier truck that can be used in the present invention,
The carriage 100 of this example is equipped with the work positioning device 26 similar to the one described above, but does not autonomously move, has a pin 102 that can be engaged with a chain 101 laid in the floor, and continuously moves. By moving the above-mentioned chain 101 and the pin 102 which are engaged with each other, the movement along a predetermined path is performed, and the dolly itself is lifted up on the floor surface by the lifter with the locate pin provided on each stage, and the pin 102 is connected to the chain 1.
It is positioned and fixed in a predetermined position by being separated from 01.

By using such a carriage 100, the structure of the carriage can be simplified.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-described example. For example, the work positioning device 26, 8
9 indicates that the work receiving member 30 is moved by an ordinary robot equipped with a motor, and the type switching stage 21
May indicate only the arrangement of those work receiving members.

Further, the carrying method of the present invention can be applied not only to the left and right body side sub-lines described above, but also to other body parts having many works to be constructed, for example, a floor main assembly line.

(Effect of the invention) Thus, according to the method of transporting vehicle body parts of the present invention and the vehicle carrier used for the method, when the vehicle carrier is moved to the vehicle body assembly position and the vehicle body parts are positioned by the work positioning means on the vehicle carrier, Since the unnecessary work positioning means is not disposed there, it is possible to secure a sufficient working space for the vehicle body component joining equipment at the vehicle body assembly site, and at the same time, the unnecessary work positioning means can be left idle. In addition, it can be used immediately for assembling vehicle body parts in combination with other work positioning means, and waste of equipment can be prevented.

[Brief description of drawings]

FIG. 1 is a perspective view showing a carrier truck equipped with two workpiece positioning devices in a joined state, which is used in a right body side subline of an assembly line of an automobile body to which an embodiment of a method for transporting vehicle body parts of the present invention is applied, FIG. 2 is a side view of the carrier as seen from the direction of arrow II, FIG. 3 is an explanatory view showing a state in which one of the two work positioning devices is separated, and FIG. 4 is a view of the vehicle body assembly line. Fig. 5 is a schematic diagram showing the overall layout, Fig. 5 is a perspective view schematically showing the left hood ridge subline and the engine compartment assembly stage of the vehicle body assembly line, and Fig. 6 is the front floor the brine and floor of the vehicle body assembly line. FIG. 7 is a perspective view schematically showing a main assembly stage and a floor main boosting stage, and FIG. 7 is a carrier used in the vehicle body assembly line. FIG. 8 is a perspective view showing a part of the work positioning device and a part of the switching type drive device of the type switching stage. FIG. 8 is a perspective view showing the body main assembly stage of the vehicle body assembly line. FIGS. 11A and 11B are perspective views showing specific examples of the positioning and fixing method of the work positioning apparatus in the vehicle body assembly line, and FIG. 11 is a perspective view showing another example of the carrier truck used in the method of the present invention. 1 …… Left Hood Ridge Subline 2 …… Dash Lower Subline 3 …… Radiator Core Support Subline 4 …… Right Hood Ridge Subline 5 …… Front Floor Subline 6 …… Rear Floor Subline 7 …… Engine Compartment Assembly Stage 8 …… Floor Main Assembly stage 9 …… Floor main overdrive stage 10 …… Roof panel sub line 11 …… Parcel shelf sub line 12 …… Air box sub line 13 …… Rear panel sub line 14 …… Left body side sub line 15 …… Right body side sub line 16 …… Body main assembly stage 17 …… Body main overdrive stage 21 …… Type switching stage 22 …… Work receiving stage 23 …… Assembly stage, 24 …… Transfer stage 25 …… Transport carriage, 26 …… Work positioning device 29… Moving mechanism, 30 …… Work receiving member 34 …… Switching drive device, 44 …… Work shelf 45 …… Welding robot 53 …… Overhead conveyor 54 …… Traveling vehicle, 61 …… Left hood ridge 62 …… Right hood ridge , 63 …… Dash lower 64 …… Radiator core support 65 …… Engine compartment 66 …… Front floor, 67 …… Rear floor 68 …… Floor main, 69 …… Roof panel 70 …… Parcel shelf, 71 …… Air box 72 …… Rear panel, 73 …… Left body side 74 …… Right body side, 81,83 …… Lifter 82,84 …… Locating pin, 86 …… Coupling stage 87 …… Separation stage 89 …… Another workpiece positioning device 100 …… Transport vehicle, 101 …… Chain 102 …… Hanging pins, A to M …… Transport vehicle route N …… Drop lifter route R, S …… Conveyor line

Claims (2)

[Claims] 1. When carrying and holding a plurality of works and vehicle body parts assembled from the works in a positioned state by using a carrying carriage equipped with a work positioning means having a plurality of work holding means, said carrying carriage In the above, two work positioning means that can hold the plurality of works in a positioned state in combination with each other are mounted, and after the plurality of works are joined to each other in the positioned state to assemble the vehicle body parts, the A method of transporting a vehicle body component, characterized in that one of two work positioning means capable of holding the vehicle body component in a positioned state is left on the transport vehicle and the other is separated from the transport vehicle. 2. A vehicle body having two work positioning means, which are combined with each other and capable of holding the plurality of works in a positioned state, and wherein the two work positioning means are assembled from the plurality of works. 2. A carrier truck for use in a method of transporting vehicle body parts according to claim 1, wherein one workpiece positioning means capable of holding a component in a positioned state is left, and the other workpiece positioning means is separable from the carrier truck.