JP2974261B2 - How to assemble a car body - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of assembling an automobile body, and more particularly to an assembling method capable of improving the joining accuracy of a body and shortening a welding process.

[0002]

2. Description of the Related Art Recently, when a body is assembled on an assembly line of an automobile body, a sub-assembly line usually includes a main floor panel, a front body, a rear body including a rear floor, a body side panel (side inner panel and side outer panel). ), Roof panel (including roof inner member and roof outer panel), lid member (side door, bonnet, trunk lid, etc.)
And so on, and supply them to the body assembly line. Next, at the underbody assembly stage of the body assembly line, the floor panel, the front body, and the rear body are positioned and fixed on a trolley equipped with a plurality of positioning members and clamps, and are subjected to temporary tapping and additional tapping welding to assemble the underbody. .

[0005] Next, the bogie and the underbody are transferred to an upper body assembling stage, where the body side panel and the roof panel are assembled to the underbody, and the outer panels are assembled using dedicated positioning jigs provided for each station. The upper body is assembled by positioning and fixing with reference to the reference surface, and performing temporary welding and additional welding thereon. In this stage, the front fender and the rear fender are also assembled and connected.

On the other hand, JP-A-64-1667 discloses that
A holding device for holding a partially assembled body is disclosed. In this holding device, a main frame is pivotally attached to two pillar members on one side of the four pillar members erected on the floor of a factory so as to be vertically swingable, and can be horizontally supported by the four pillar members. The main frame is provided with three pairs of vertical internal frames corresponding to the vicinity of the body cowl portion, the central portion of the body, and the rear portion of the body so as to be swingably openable and closable in the vehicle width direction. It is equipped with tools and the like.

[0005] The partially assembled body shell (which appears to be a state in which the underbody and the left and right side inner panels are at least temporarily assembled) is held from above to the roof opening before the roof is assembled. Swing the main frame of the device downward and insert the three pairs of narrowly closed inner frames into the body shell, then open the three pairs of inner frames by rocking and approach the left and right inner sides of the body shell Then, the remaining body assembling work is performed via the plurality of clamps and tools.

[0006]

In the recent body assembling method, a panel member is positioned with reference to a reference surface of an outer panel such as a body side panel using a dedicated positioning jig. The outer panel has a complicated shape with a curved surface, and the shape error is large and the rigidity is low due to the influence of the springback. Therefore, the positioning accuracy of the panel members is low, and the coupling accuracy of the body is likely to be low. It is necessary to form a large number of welding holes in these inner members to weld the joints of the side inner panels such as the body side panel and the roof inner member. Welding robots are placed outside the body to perform welding work only from outside, so welding That the station number is a number line becomes longer, there are problems such as.

In the assembling method using the holding device described in the above publication, the holding device is applied after at least the underbody and the side inner panel are temporarily assembled, so that the body is held in the temporarily assembled state. Therefore, it is necessary to provide brackets, stays, bolts, and the like on the panel member, and thus there is a problem that the structure of the panel member is complicated. However, it has been proposed to insert the internal frame into the body from the floor opening before assembling the floor panel instead of the roof opening, but the details are unknown.

SUMMARY OF THE INVENTION An object of the present invention is to improve the coupling accuracy of a body, at the time of assembling a body side panel and a roof panel, simplify a structure of a panel member, and improve the efficiency of a coupling work. Is to provide an assembling method.

[0009]

According to a first aspect of the present invention, there is provided a method of assembling an automobile body, wherein at least the left and right body side panels and the roof panel are sub-assembled at least when the body side panel and the roof panel are assembled in the body assembly process. A side inner panel and a side outer panel, and a roof inner member and a roof outer panel of a roof panel, which are separately supplied to a docking station for assembly.
In the process, the left and right side inner panels and the roof inner member are supplied to the docking station, and they are positioned and fixed, and they are joined by performing the temporary welding and the additional punching welding. In the second process, the left and right side outer panels and the roof outer panel are connected to the docking station. , The left and right side outer panels are positioned on the side inner panel, and the roof outer panel is positioned with respect to the roof inner member, and these panels are joined by performing preliminary tapping welding and additional tapping welding.

According to a second aspect of the present invention, there is provided a vehicle body assembling method.
2. The method of assembling an automobile body according to claim 1, wherein the left and right side outer panels and the roof outer panel are increased by welding means provided in the internal space of the body body and welding means provided outside the body body in the second step. It is to be welded.

According to a third aspect of the present invention, there is provided a vehicle body assembling method.
2. The method of assembling an automobile body according to claim 1, wherein in the second step, temporary welding is performed by a welding means provided in an internal space of the body body, and thereafter, a welding robot provided outside the body body at an additional station. This is to perform additional welding.

[0012]

In the method for assembling an automobile body according to the first aspect, the side inner panel and the side outer panel of at least the left and right body side panels which are pre-assembled and the roof inner member and the roof outer panel of the roof panel are separately supplied to the docking station. When assembling the body, in the first step, the left and right side inner panels and the roof inner member are supplied and fixed in position, and they are joined by performing temporary tapping and additional tapping welding. Based on these side inner panels and roof inner members, which are high and have less shape errors due to springback, it is possible to accurately perform positioning and weld joint work without an outer panel based on these side inner panels. And Roofy There is no need to provide a welding hole in Na member. Further, since there is no need to provide brackets and stays for temporary assembly on the side inner panel and the roof inner member, the structure of these panels and members is simplified.

Next, in a second step, the left and right side outer panels and the roof outer panel are supplied, the left and right side outer panels are positioned with respect to the side inner panel, and the roof outer panel is positioned with respect to the roof inner member. Since the welding and the overstrike welding are performed to join, the outer panels can be accurately positioned and connected to the side inner panel and the roof inner member that have been positioned and connected with high accuracy. Therefore, the body can be assembled with high coupling accuracy.

According to a second aspect of the present invention, in the method for assembling an automobile body according to the first aspect, the welding means provided in the internal space of the body body and the welding means provided outside the body body in the second step. Since the side outer panel and the roof outer panel are additionally welded, the efficiency of the welding operation can be increased, the number of stations for the additional welding can be reduced, and the line can be shortened.

According to a third aspect of the present invention, in the method for assembling a vehicle body according to the first aspect, in the second step, a tapping welding is performed by a welding means provided in an inner space of the body main body, and thereafter, at the additional punching station. Since additional welding is performed by a welding robot provided outside the body, the efficiency of temporary welding can be improved and the versatility for assembling the body of various models can be increased. The versatility when assembling bodies of various types of vehicles is enhanced because the punch welding is performed.

[0016]

As described above, the following effects can be obtained. According to the method for assembling an automobile body according to the first aspect, first, the left and right side inner panels and the roof inner member are supplied and fixed in position in the first step, and they are joined by performing temporary welding and additional welding. The shape is simple, the rigidity is high, and the shape error due to spring back is small.Positioning can be accurately performed with reference to these side inner panels and roof inner members, and welding work can be performed efficiently without outer panels. And it is not necessary to provide a welding hole in these side inner panels and roof inner members. Further, since there is no need to provide brackets and stays for temporary assembly on the side inner panel and the roof inner member, the structure of these panels and members is simplified.

Further, the left and right side outer panels and the roof outer panel can be accurately positioned and connected to the side inner panel and the roof inner member that have been accurately positioned and connected. Therefore, the body can be assembled with high coupling accuracy.

According to the method of assembling an automobile body according to the second aspect, in addition to the effect of the first aspect, the efficiency of the welding operation in the second step is increased to reduce the number of stations for additional welding and shorten the line. I can do it.

According to the method of assembling an automobile body according to the third aspect, in addition to the effect of the first aspect, it is possible to increase the work efficiency of the second step of the tapping welding, and to use an externally provided welding robot. Versatility when assembling bodies of various types of vehicles to perform additional welding is enhanced.

[0020]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, the vehicle body assembly line BL is provided with nine stations S1 to S9, and the mounting jig unit J extends over the nine stations S1 to S9.
U is sequentially transferred by a transfer device (not shown), and the body members are sequentially positioned and fixed to the assembling jig unit JU based on the inner panel thereof, and the body body 1 is assembled.
Thereafter, the main floor 20 on which the outfitted components are outfitted on the vehicle assembly line CL is assembled to the body main body 1. It should be noted that a plurality of assembly jig units JU are prepared corresponding to the types of vehicles and are made to stand by at the jig stock station ST. The transfer device is of a general type of linear type or lift and carry type. It is a transport device. In the following description, the front, rear, left and right directions are the body body 1
Is defined with reference to the front, rear, left and right.

First, the assembling jig unit JU is shown in FIG.
This will be described with reference to FIGS. The assembling jig unit JU includes a pallet P, an FB holding mechanism for positioning and fixing the front body 2, and a rear floor assembly member 5.
, A pair of left and right SP holding mechanisms for positioning and fixing the left and right side inner panels 3, and a pair of left and right SP holding mechanisms for positioning and fixing the cowl / dash coupling member 6. A CD holding mechanism, a pair of front and rear RH holding mechanisms for positioning and fixing the front header 7a and the rear header 7b of the roof panel, respectively, and a PT holding mechanism for positioning and fixing the rear package tray assembly member 8 And a pair of right and left welding devices 101 for performing temporary welding and additional welding in the vicinity of the lower end of the front pillar of the side outer panel 4, and temporarily punching the inside of the side outer panel 4 at the outer periphery of the front window opening from the inside. Welding robot 102 for performing welding and overstrike welding, and temporary striking from the inside to the side outer panel 4 at the outer periphery of the rear window opening And a welding robot 102 to apply a contact and increasing strike welding.

The FB holding mechanism will be described. A pair of left and right support brackets 30 are provided at the front of the pallet P at predetermined intervals in the front and rear directions.
0, a positioning pin 31 and a clamp device C1 are provided. The front ends of the left and right front frames of the front body 2 and the left and right ends of the second cross member are positioned on the pallet P by the four positioning pins 31. It is fixed on the pallet P by the four clamping devices C1.

The RF holding mechanism will be described. A pair of left and right support brackets 32 are provided at the rear of the pallet P at predetermined intervals in the front and rear directions.
2 are provided with positioning pins 33 and a clamping device C2. The front and rear ends of the left and right rear frames of the rear floor assembly member 5 are palletized by four positioning pins 33.
And is fixed on the pallet P by four clamping devices C2.

The SP holding mechanism is for positioning and fixing the left and right side inner panels 3 respectively, and is provided at a left portion and a right portion of a substantially central portion of the pallet P, respectively.
Since the left and right SP holding mechanisms are symmetrical, only the left SP holding mechanism will be described. A fixed base 34 is provided at a substantially central left portion in the longitudinal direction of the pallet P, and a support plate 35 is supported on the fixed base 34 so as to be movable in the left-right direction. And a clamp device C3 for fixing the roof rail inner 9 at the upper end of the side inner panel 3 is provided at the upper end of a pair of vertical columns 36a in the front and rear of the support frame 36, respectively. Is provided with a positioning device P1 for positioning a substantially middle portion of the center liner 10 and a clamp device C4 for fixing the same. The rear end of the horizontal member 36b of the support frame 36 is provided at the rear end of the side inner panel 3. There is provided a positioning device P2 for positioning a portion in the vicinity of the lower end of 11 and a clamp device C5 for fixing. Further, a support table 37 is provided on the pallet P in front of the fixed table 34, and a movable plate 38 is supported on the support table 37 so as to be movable in the front-rear direction.
8, a support plate 39 is supported movably in the left-right direction, a vertical column 40 is erected on the support plate 39, and a substantially U-shaped support frame 41 is provided above the vertical column 40. At the upper part of 41, a positioning device P3 for positioning the vicinity of the lower end of the front liner 12 of the side inner panel 3 and a clamping device C6 for fixing are provided.
A clamp device C7 for fixing a lower front end of the side inner panel 3 is provided below the support frame 41. The left side inner panel 3 is positioned via positioning devices P1 to P3, and the clamp devices C3 to C7 are provided. Fixed through.

The CD holding mechanism is for positioning and fixing the cowl / dash connecting member 6, and includes a positioning pin 42 and a clamping device C on the upper portions of the left and right support frames 41.
8 are supported via a cylinder 57 (see FIG. 5) so as to be able to move up and down, and the cowl panel 13 and the dash panel upper 14 are positioned by positioning pins 42 in the vicinity of both ends at the rear thereof and fixed by the clamp device C8. You.

The RH holding mechanism will now be described. A pair of front and rear vertical columns 4 is provided between the left and right fixed bases 34 of the pallet P.
3, a support frame 44 is provided between the upper ends of the vertical columns 43, and a pair of arms 44a on the front side of the support frame 44 is provided at the ends of the front header 7a near both ends thereof from below. A positioning device P4a for positioning and a clamp device C9a for fixing are provided, and the rear end of the bifurcated arm portion 44b at the rear end of the support frame 44 has a lower portion near both ends of the rear header 7b. A positioning device P4b for positioning from the sides and a clamp device C9b for fixing are provided, and the front header 7a is
The rear header 7b is positioned and fixed to the pallet P via the pair of positioning devices P4a and the clamp device C9b, and the rear header 7b is positioned and fixed to the pallet P via the pair of positioning devices P4b and the clamp device C9b. Is done. In addition, at both ends of a pair of arms 44c provided at the center of the support frame 44, a positioning device P5 for positioning the vicinity of both ends of the roof bow 7c sub-assembled to the roof outer panel 7B is fixed. A clamp device C10 is provided.

As shown in FIG. 6, each of the clamp devices C1 to C10 is a toggle clamp device having a general configuration including a substantially crank-shaped clamp lever 45 and an air cylinder 46 for driving the clamp lever 45 to rotate. The positioning devices P1 to P5 have a general configuration including a positioning pin 47 and an air cylinder 48 for driving the positioning pin 47 to move forward and backward. In the SP holding mechanism, FIG.
As shown in the figure, the clamp levers 45 of the clamp devices C6 and C7 are connected to the openings 3a formed in the side inner panel 3.
To clamp the side inner panel 3.

The PT holding mechanism will be described. A support plate 50 is provided on the rear upper surface of the left and right fixing bases 34, and a support member 51 is supported on the support plate 50 so as to be movable back and forth. A movable plate 5 having a pair of left and right support brackets 52 extending rearward on the side.
The movable plate 53 is driven up and down by a pair of left and right cylinders 54. The left and right support brackets 52 are provided with four positioning pins 55 and a pair of clamp devices C11.
Is constituted by a toggle clamp device having a pair of front and rear clamp levers 56a and an air cylinder 56b for rotating the clamp levers 56a. The rear package tray assembly member 8 is positioned through four positioning pins 55, and It is fixed by the left and right clamp devices C11.

The clamping devices C3 to C5 and the positioning devices P1 and P2 are connected via a support frame 36, and the clamping devices C6 to C8, the positioning device P3 and the positioning pins 4
2 is a vertical column 40, a movable plate 38, and a support plate 39.
And the clamping device C11 and the positioning pin 55
As shown in FIG. 3, when the vehicle body members are mounted on the mounting jig unit JU via the support member 51 and the movable plate 53, the drive members (not shown) are moved to the mounting positions shown by solid lines by solid lines. After being driven and assembling the body body 1 with necessary body members, the assembling jig unit JU can be pulled downward from the floor opening 1a (see FIG. 5) before assembling the main floor panel. As described above, each of them is driven to move to the illustrated retreat position by the virtual line.

The pair of left and right welding devices 101 are fixedly or position-adjustable at the rear upper end of the corresponding support frame 41, and are mounted on the side outer panel 4 near the lower end of the front pillar by the welding head 101a. On the other hand, it is configured to perform temporary welding and additional welding.
Further, the welding robot 102 is an articulated robot that is erected and fixed on the pallet P near the front side of the vertical column 43 on the front side. Further, the welding robot 103 is an articulated robot which is disposed and fixed upside down between two forks at the rear part of the support frame 44.

Next, the vehicle body members supplied to the vehicle body assembly line BL will be described with reference to FIG. The front body 2 includes left and right front frames, left and right wheel aprons, a dash panel lower, a dash lower member (a second cross member), and the like, and is sub-assembled along a first sub line SL1. The shroud panel at the front end of the body is similarly sub-assembled, but is assembled to the body 1 after the engine is mounted.
The rear floor assembly member 5 includes a rear floor panel, left and right rear frames, a fourth cross member, a rear cross member, a trunk floor, a rear end panel, and the like, and is sub-assembled in a first sub-line SL1.

The left and right side inner panels 3 are composed of an inner panel main body, a roof rail inner, an impact bracket, a wheel house, a suspension reinforcing material, and the like, and are sub-assembled in a second sub-line SL2. A front header 7a and a rear header 7b as a roof inner member of the roof panel are respectively composed of a header inner panel and a header outer panel, and are sub-assembled by a third sub-line SL3. The left and right side outer panels 4 include an outer panel main body, a front hinge reinforcing material, a rear hinge reinforcing material, a center pillar reinforcing material, a rear striker reinforcing material, a corner plate, and the like, and are sub-assembled by a fourth sub-line SL4. The roof outer panel 7B includes an outer panel main body and a roof bow 7c, and the like, the rear package tray assembly member 8 includes a package tray and a bracket, and the cowl / dash coupling member 6 includes
It is composed of a cowl panel, a dash panel upper, etc., which are respectively sub-assembled in the fifth sub-line SL5.

Regarding the lid member, the hood and the trunk lid are respectively sub-assembled with sub-lines (not shown), and the four side doors 15 each include a door inner panel, a door outer panel, a sash, a window glass, a window regulator, and the like. The sub-assembly is performed by six sub-lines SL6.

Next, a method of assembling the body 1 of the automobile will be described with reference to FIGS. Since the body body 1 is assembled by assembling the body members one by one to the assembling jig unit JU which is sequentially transferred to the stations S1 to S9 of the body assembly line BL,
The contents of the assembly work in each of the stations S1 to S9 will be described in order from the upstream side. Stations S1 to S1 in the figure
The assembly jig unit JU in S9 / CS / RS is not shown. The stations S1 to S7 correspond to a docking station.

<First Station> First Station S
In FIG. 7, as shown in FIG. 7, the front body 2 and the rear floor assembling member 5 are positioned after being supplied from the first sub-line SL1 to the assembling jig unit JU transferred and positioned from the jig stock station ST. And fix it. At this time, as shown in FIG. 2, the front body 2 is connected via the four positioning pins 31 and the four clamping devices C1 of the assembling jig unit JU and the rear floor assembly member 5
Are accurately positioned and fixed to the assembling jig unit JU via the four positioning pins 33 and the four clamping devices C2.

<Second Station> Second Station S
7, the jig unit JU transferred from the first station S1 and positioned as shown in FIG.
Left and right side inner panels 3 from the second subline SL2
Is supplied and positioned and fixed. At this time, the left and right side inner panels 3 are positioned by the positioning device P as shown in FIG.
1 to P3 and the clamping jig units JU via the clamp devices C3 to C7, respectively, to accurately position and fix the jig units JU.

Here, the side inner panel 3 is
The transfer device 60 for transferring to the station S2 will be briefly described. As shown in FIG. 10, a guide rail (not shown) is provided over the upper part of the downstream end of the second sub-line SL2 and the upper part of the second station S2. A pair of left and right vertical frames 61 extending downward are movably supported by the guide rails, and vertically movable arms 62 are vertically movably supported on both vertical frames 61 in a cantilever manner. The frame 61 is driven up and down by a lifting drive mechanism (not shown) provided near the upper end of the frame 61. A guide rail 63 is attached to the side surface of each lifting arm 62, and a base plate 64 that is driven to move in the left-right direction by a cylinder 65 is supported on the guide rail 63, and a vertical cylinder 66 is erected on the base plate 64. ,
A movable plate 67 is provided at the lower end of the piston rod 66 a of the cylinder 66, and a support arm 68 and an anti-swing arm 69 that can be inserted through the door opening of the side inner panel 3 are provided on the movable plate 67 so as to be rotatable. The side inner panel 3 is conveyed in a state where it is supported via a support arm 68 and is held via a swing prevention arm 69 so as not to swing.

<Third Station> Third Station S
At 3, the front header 7a and the rear header 7b are supplied from the third sub-line SL3 to the assembly jig unit JU positioned as shown in FIG. At this time, these headers 7a and 7b are
As shown in FIG. 4, accurate positioning is performed via positioning devices P4a and P4b and clamping devices C9a and C9b, respectively. Thereafter, the two ends of the headers 7a and 7b are temporarily welded to the left and right side inner panels 3 by two welding robots 70 provided at the third station S3, and the side inner panels 3 are assembled to the front body 2 and the rear floor assembling members. 5 is tack-welded.

<Fourth Station> Fourth Station S
4, two welding robots 71, as shown in FIG.
The left and right side inner panels 3 are connected to the front body 2 and the rear floor assembly member 5, and the headers 7a and 7b are connected to the left and right side inner panels 3.

<Fifth Station> Fifth Station S
In 5, the left and right side outer panels 4 are supplied from the fourth sub-line SL4 as shown in FIG. 8, and are respectively positioned and fixed to the left and right side inner panels 3 fixed to the assembling jig unit JU.

<Sixth Station> Sixth Station S
In FIG. 6, the roof outer panel 7B, the cowl-dash connecting member 6, and the rear package tray assembly member 8 are positioned and fixed to the assembling jig unit JU from the fifth sub-line SL5 as shown in FIG. . At this time, as shown in FIG. 3, the roof outer panel 7B is accurately positioned and fixed via the positioning device P5 and the clamp device C10, and the cowl / dash connecting member 6 is positioned via the positioning pin 42 and the clamp device C8. Then, the rear package tray assembly member 8 is accurately positioned and fixed via the positioning pins 55 and the clamp device C11. Then the outside 2
Welding robots 73 and two welding devices 101 and two welding robots 102 provided in the assembly jig unit JU.
According to 103, the side outer panel 4 is tack-welded to the side inner panel 3, the cowl-dash connecting member 6 is tack-welded to the side inner panel 3 and the front body 2, and the roof outer panel 7B is connected to the front and rear headers 7a and 7b. Temporarily welded to the side outer panel 4,
Further, the rear package tray assembly 8 is temporarily welded to the side inner panel 3 and the rear floor assembly 5.

<Seventh Station> Seventh Station S
In FIG. 7, two external welding robots 74 and two welding robots 102 and 103 before and after the assembling jig unit JU are added to the vehicle body members that are temporarily punched and welded at the sixth station S6 as shown in FIG. Punch welding is performed.

<Eighth Station> Eighth Station S
In FIG. 8, the front and rear side doors 15 are sequentially supplied from the sixth sub-line SL6 by a pair of left and right door supply robots 75, as shown in FIGS. The nut 76 is fastened to the side outer panel 4 by the nut runner 79 of the fastening device 78. The door supply robot 75 is an articulated robot having an existing well-known configuration, and its hand 75a is provided with a frame 81 provided with a pair of toggle clamp devices 80, and the clamp lever 80a of the clamp device 80 is opened from the window opening. The door sash is inserted and held by the clamp lever 80a.

<Ninth station> Ninth station S
9, at stations S1 to S1 as shown in FIGS.
The body body 1 assembled in S8 is lifted by the lifting / lowering device 82 to pull out the assembly jig unit JU relatively downward from the body body 1, and the assembly jig unit JU is transferred to the jig stock station ST. The body body 1 is transferred to the transfer station CS on the vehicle assembly line CL.

The lifting device 82 will be described. As shown in FIGS. 12 and 13, a vertical column 83 is erected on the right side of the ninth station S9 and the transfer station CS at a predetermined distance back and forth. The vertical column 83 has a lifting arm 84
Are supported movably up and down, and a support frame 85 is provided at the tip of both lifting arms 84. A guide rail 86 is provided between the front and rear support frames 85. The guide rail 86 is supported by the support frame 85 and the lifting arm 84. Both are driven up and down by a lifting drive mechanism 87. A base plate 88 is suspended on the guide rail 86 so as to be movable in the front-rear direction. Four support arms 89 capable of supporting the body 1 from below are swingably supported at four corners of the base plate 88. 12 is driven to open and close through a cylinder 90 attached to the arm portion 85a of the support frame 85 to a use position shown by a one-dot chain line in FIG. 12 and a retracted position shown by a two-dot chain line in FIG. When the body 1 is transferred from the ninth station S9 to the transfer station CS while the body 1 is lifted, and the body 1 is lowered, as shown in FIG.
In the vehicle assembly line CL, the main floor 20 on which the outfittings are mounted in advance is assembled.

In the vehicle assembly line CL, the main floor 20 is sequentially conveyed to a plurality of stations (not shown) in a state where the main floor 20 is positioned and set on the pallet CP, and changed to a floor mat, left and right seat belts, and left and right front seats 21. The levers 22 and the like are sequentially assembled, and the left and right rear seats 23 are placed on the main floor 20. Then, as shown in FIG. 13 and FIG. 14, the main floor 20 equipped with the outfitting parts is transferred to the transfer station CS,
Assembly device 91 provided below transfer station CS
After positioning the main floor 20 with respect to the body body 1 supplied and lowered from the ninth station and assembling the main floor 20 by welding, as shown in FIG. The left and right front fenders 18 are assembled. Since the vehicle assembly line CL is not directly related to the present invention, a detailed description thereof will be omitted. "Modification" An assembly jig unit JU is used as a mechanism for positioning and fixing the front end of each side inner panel 3.
For example, as shown in FIG. 15, a support member 96 that is movable in the left-right direction by a cylinder 95 is provided, a positioning pin 97 and a positioning portion 98 are provided at the upper end thereof, and the side inner panel 3 is provided at a middle portion of the support member 96. A positioning portion 99 for positioning the lower portion may be provided. Although not shown, a similar clamping device for fixing the side inner panel 3 is also provided on the support member. Reference numeral 100 denotes a welding gun for performing temporary welding on the side inner panel 3 in the third station S3.

As described above, according to the assembly jig JU for the automobile body, the front body 2 can be accurately positioned and fixed via the four sets of positioning pins 31 and the four sets of clamp devices C1. The rear floor assembling member 5 can be accurately positioned and fixed via the four sets of positioning pins 33 and the four sets of clamps C2, and each of the right and left can be set via the positioning devices P1 to P3 and the clamps C3 to C7. The side inner panel 3 can be accurately positioned and fixed, and the front header 7a can be accurately positioned and fixed via two sets of positioning devices P4a and two sets of clamping devices C9a. The rear header 7b can be accurately positioned and fixed via two sets of positioning devices P4b and two sets of clamping devices C9b. The cowl-dash connecting member 6 can be accurately positioned and fixed via the positioning pins 42 and the two sets of clamp devices C8, and the cowl and dashes can be fixed via the four sets of positioning pins 55 and the two sets of clamp devices C11. The dash connection member 6 can be accurately positioned and fixed. Further, since a pair of welding devices 101 and a pair of front and rear welding robots 102 and 103 are provided, a part of the temporary welding and the additional welding to the side outer panel 4 can be performed from inside the body 1.

The assembling jig unit JU is provided vertically from the floor opening 1a in the space inside the body from below, and is moved downward relative to the body 1 after the body 1 is assembled. Since it is configured so as to be pulled out from the body main body 1, the assembly jig unit JU can be configured as a large multifunctional unit. However, the positioning pin, the positioning device, and the clamp device of the present embodiment are merely examples, and it is needless to say that various changes can be made to these components, and the assembly unit JU can be variously modified. It is also possible to mount tools, welding electrodes and heads.

According to the method of assembling the automobile body, first, the front body 2 and the rear floor assembling member 5 are positioned and fixed via the assembling jig unit JU, and then the side inner is attached to the assembling jig unit JU. The panel 3, the front header 7a and the rear header 7b are supplied, and these inner members are positioned and fixed via an assembling jig unit JU.
Then the left and right side inner panels 3 are attached to the front body 2
And the rear floor assembling member 5 and the front and rear headers 7a and 7b, so that it is possible to assemble with high precision and efficiency, and to omit a large number of welding holes for welding these inner members. After the inner members are welded and connected, the side outer panel 4 and the roof outer panel 7A are supplied, and the side outer panel 4 is positioned and connected to the side inner panel 3 which is positioned and connected with high precision as described above. In addition, since the roof outer member 7A is positioned and connected to the roof inner members 7a and 7b that are accurately positioned and connected, these outer members can be accurately positioned and efficiently assembled. Also, since the body body 1 is assembled using the large and multifunctional assembling jig unit JU, the assembling work can be performed efficiently. Since the body components such as the side inner panel 3 are directly assembled to the assembly jig unit JU, there is no need to preliminarily assemble the body shell in advance. It is possible to simplify the structure of the body component member without providing a stay, a bolt, and the like, and to omit the temporary assembly process. Also, a welding device 1 provided in the assembling jig unit JU.
01 and the welding robots 102 and 103, the temporary tapping welding and the additional tapping welding to the side outer panel 4 can also be performed from the inside of the body 1, so that these welding operations can be performed efficiently and the number of stations for welding can be increased. Can be reduced. Further, after the assembly of the body 1 is substantially completed, the assembling jig unit JU is pulled out relatively downward with respect to the body 1, and the main floor 20 is attached to the body 1.
Since the fittings such as seat devices can be sub-assembled on the main floor 20 in advance,
Outfitting of the main floor 20 is improved.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of a vehicle body assembly line.

FIG. 2 is a perspective view of an assembly jig unit.

FIG. 3 is a plan view of the assembly jig unit.

FIG. 4 is a side view of the assembly jig unit.

FIG. 5 is a front view of the assembly jig unit.

FIG. 6 is a view taken in the direction of arrow 6 in FIG. 3;

FIG. 7 is a configuration diagram of a main part of a vehicle body assembly line.

FIG. 8 is a configuration diagram of a main part of a vehicle body assembly line.

FIG. 9 is a configuration diagram of main parts of a vehicle body assembly line and a vehicle assembly line.

FIG. 10 is a front view of the transfer device.

FIG. 11 is a perspective view of a fastening device and a door supply robot.

FIG. 12 is a front view of the lifting device.

FIG. 13 is a front view of an assembling device, a body main body, and a main floor.

FIG. 14 is a side view of an assembling device, a body main body, and a main floor.

FIG. 15 is a front view of a side inner panel positioning mechanism according to a modification.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body main body 3 Side inner panel 4 Side outer panel 7B Roof outer panel 7a Front header 7b Rear header 31 ・ 33 ・ 42 Positioning pin JU Assembly jig unit C1 to C11 Clamping devices P1 to P5 Positioning device S1 to S7 First to seventh Stations SL1 to SL5 First to fifth sublines 73, 74, 102, 103 Welding robot 101 Welding device

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁶ , DB name) B23P 21/00 303 B23K 9/12 B62D 65/00

Claims (3)

(57) [Claims] When assembling at least left and right body side panels and a roof panel in a vehicle body assembling process,
A first method of assembling an automobile body, wherein at least a side inner panel and a side outer panel of at least the left and right body side panels and a roof inner member and a roof outer panel of a roof panel, which are pre-assembled, are separately supplied to a docking station and assembled. Then, the left and right side inner panels and the roof inner member are supplied to the docking station, and they are positioned and fixed, and are also joined by performing a temporary welding and an additional welding. In the second step, the left and right side outer panels and the roof outer panel are connected to the docking station. Supply, position the left and right side outer panels with respect to the side inner panel, and position the roof outer panel with respect to the roof inner member, and also perform temporary welding and additional welding of these panels Method of assembling a car body, characterized in that the coupling performed. 2. The method according to claim 1, wherein in the second step, the left and right side outer panels and the roof outer panel are additionally welded by welding means provided in the internal space of the body body and welding means provided outside the body body. Item 4. The method for assembling an automobile body according to Item 1. 3. The method according to claim 2, wherein in the second step, temporary welding is performed by a welding means provided in the internal space of the body main body, and thereafter, additional welding is performed by a welding robot provided outside the body main body at the additional punching station. 2. The method for assembling an automobile body according to claim 1, wherein