JPH04193432A - Assembling system for automobile body - Google Patents

Abstract

PURPOSE:To simplify a physical distribution system by assembling a floor on a floor assembling line at the first story out of components worked at the first and second story parts, and joining a roof and side panels worked at the second story part to the floor on a body assembling station. CONSTITUTION:A front floor Wlb and a rear floor Wlc worked on the work lines 9,10 at the second story part 2 are supplied to the upside on one side of the joining station of a floor assembly line 7 by respective transport means, received by respective transfer means and shifted to the position over a joining station, at the same time by a transfer means a front component Wla is in rear of the set jig of the joining station, the rear floor Wlc is in front of it, and the front floor Wlb is in the middle part, respectively loaded, and a floor Wl is assembled by weld-joining them. A roof W4 at the second story part is set on a pallet and delivered to a roof charging device with a transfer machine, further the floor Wl is delivered to a floor charging device to transport to a body assembly station, side panels are set from both sides of the floor Wl, a roof W4 is set from the upside, and they are joined together by welding.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an automobile body assembly system for assembling an automobile body by joining a floor, side panels, and roof.

(Prior Art) Conventionally, according to Japanese Patent Application Laid-Open No. 62-160970, a floor processing line was arranged upstream of a car body assembly station in which welding jigs that could freely set side panels were placed on both left and right sides, and Side panel processing lines are placed on both sides of the line, and the roof is transported near the body assembly station using a Noonga conveyor, etc., and the roof and floor from the floor assembly line are delivered to the body assembly station using an appropriate conveyance set means. However, it is known that an automobile body is assembled by setting a side panel from a site tunnel processing line on the welding jig and joining it to a roof and a floor.

Incidentally, a floor is generally constructed by combining three parts: a front component that constitutes the engine room, a front floor that constitutes the floor surface of the passenger compartment, and a rear floor that constitutes the trunk room. Parts are processed on each processing line set up at a location away from the main line including the floor assembly line, and transported from these processing lines to the floor assembly line by a hanger conveyor, etc., and these parts are processed on the assembly line. The floor is assembled by joining them together, and the roof is also transported to the vicinity of the vehicle body assembly station by a hanger conveyor or the like from a roof processing line located at a location away from the main line installation location.

(Problems to be Solved by the Invention) In the above-mentioned method, the length of the conveyor path such as the hanger conveyor for conveying the floor component parts and the roof to the floor assembly line or the vehicle body assembly station becomes long, and the hanger conveyor is There is a problem that the logistics system for the floor components and roof is complicated due to the intricate arrangement inside the building.

In view of the above points, the present invention arranges the processing lines for floor components and roof components above the main line, utilizes the space in the factory three-dimensionally, and moves each part from each processing line to the main line as required. It is an object of the present invention to provide an assembly system for an automobile body that can be transported from above over the shortest possible distance, thereby simplifying the physical distribution system.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a first floor portion and a second floor portion, and a welding device having a welding jig that can freely set side panels on the first floor portion. A main line with body assembly stations located on both the left and right sides, a floor assembly line on the upstream side, and a floor parts processing line further upstream that processes some of the floor components, is installed on the second floor. A separate floor parts machining line and a roof machining line are placed on the second floor to process the remaining floor components, and the floor components processed on the floor parts machining line placed on the second floor are The component parts are lowered from the floor assembly line to the floor assembly line, and the floor assembly line is assembled with the floor component parts transported from the floor parts processing line placed on the first floor, and the roof is processed. The roof processed on the line is lowered from the second floor to the vicinity of a car body assembly station, and then introduced into the car body assembly station, and the welding jig is attached to the roof and the floor that is fed into the car body assembly station from the floor assembly line. The car body can be assembled by joining the side panels that are set on the side panels.

(Function) Floor components processed on the floor parts processing line installed on the first floor and other floor components processed on the floor parts processing line installed on the second floor and lowered from the second floor to the floor assembly line. The floor components are combined on the floor assembly line to assemble the floor, and the floor is fed from the floor assembly line to the vehicle body assembly station. On the other hand, the roof processed on the roof processing line installed on the second floor is lowered from the second floor to the vicinity of the body assembly station and fed into the assembly station, and the roof and floor are attached to both sides of the assembly station. The side panels set in the welding jigs of the respective devices are joined by the arranged welding devices to assemble the automobile body.

The side panel processing lines may be provided on both sides of the floor assembly line as in the above-mentioned conventional technology, but if the side panel processing lines are provided on the second floor, they can be placed on both sides of the floor assembly line on the first floor. It is possible to install additional lighting lines on the car body, improving space efficiency on the first floor.

In addition, when inserting parts such as the roof and the dash board upper or the tray between the left and right side panels at the body assembly station, and connecting these inserted parts to the side panels, the processing line for the inserted parts should be changed. It is installed on the second floor, and the inserted parts are lowered together with the roof from the second floor near the vehicle body assembly station.

(Embodiment) The illustrated embodiment shows an embodiment in which an automobile body W is assembled by combining a floor W1, a side panel W2, a roof W, a dash board upper W4, and a rear tray W5 shown in FIG. 26. Note that the floor W1 includes the front components W, m that make up the engine room and the front floor W1.m that makes up the floor surface of the passenger compartment. It is constructed by combining the rear floor woe and the rear floor woe that constitutes the floor surface of the trunk room.

The factory has a first floor section 1 and a second floor section 2, and the first floor section 1 has, as shown in Fig. 1 and Fig. 2 (a),
A main line 3, an additional lighting line 4 of the vehicle body W on the left and right sides thereof, a MIG welding process 5a for the inner plate of the vehicle body W, a sealing and caulking process 5b, and a manual welding process 5C on the other side. A post-process line 5 having an external parts assembly process 5d for assembling external parts such as a bonnet, a tailgate, a front fender, and a door to the vehicle body W is arranged.

In the main line 3, from the upstream side to the downstream side, front components W11, which are floor components, are installed.
A processing line 6, an assembly line 7 for the floor W1, and a vehicle body assembly line 8 are arranged.

In the second floor part 2, as shown in Fig. 1 and Fig. 2 (b),
A front floor W1 is located above the front component processing line 6 and is the remaining component of the floor W1.
．． A machining line 9 for the roof W and a machining line 10 for the rear floor W1c are installed in parallel, and a machining line 11 for the roof W and the machining line 11 for the dash board upper W4 are located above the floor assembly line 7. 12 are arranged,
Furthermore, processing lines 13.13 for a pair of left and right side panels W2 are arranged in the front.

The floor assembly line 7 is a front component W1.
and front floor W, b and rear floor W1. As shown in FIGS. 3 and 4, the front component W
1. and front floor W8. Torya floor W1, and 3
A setting jig 14 is arranged to position and support the parts in the required positional relationship, and two welding robots 15 and 15 are arranged on both sides of the station 7a, respectively, and each part is transferred and loaded separately. The parts are placed on the setting jig 14 by the means 1B and 17.18, and in a state where these parts are positioned and supported by the setting jig 14 in the required positional relationship, the front floor W1. and the front component W1 behind it (with respect to the conveyance direction of the floor). The welding robot 15 at the rear welds the front floor W1b and the floor W1 in front of it, and the welding robot 15 at the front welds the front floor W1b and the floor W1 in front of it. The transfer device 20 sequentially transports the lights to the multiple lighting stations 7b and 7c, and multiple welding robots 15° arranged on both sides of each of the multiple lighting stations 7b and 7c perform additional welding on the floor W1. The setting jig 14 has the above three members W on both sides of its upper surface.

It is equipped with a plurality of positioning members 14a for positioning and supporting Wl, , w, and a jig exchange station 7d is further provided behind the joining station 7a, and a rail 2 is laid between the two stations 7a and 76. Set jig 1
4 is supported on the rail and can be freely drawn out from the coupling station 7a to the exchange station 7d, and the setting jig 14
It was made possible to obtain by exchanging In addition, the setting jig 14
is normally held in place on the joining station 7a by a positioning cylinder 14b shown in FIGS. 5 and 6.

Front component W1. are transported from the processing line 6 by the transport means 22 to a supply position adjacent to the rear of the shunting station 7d, and then transported forward through the upper space of the shunting station 7d by the transfer means 1B to the setting jig 14. To explain this in detail,
The conveying means 22 conveys the front component W1° placed on the pallet P to the supply position at the front end, lowers the empty pallet P using the lift-down device 22a at the front end and returns it to the rear, and lifts up the rear end. The pallet P is raised by the device 22b, and the front component W delivered from the processing line 6 is placed on top of the pallet P.

The transfer means 16 is configured so as to repeatedly place and transport the same to the supply position, and the transfer means 16 moves between the supply position and the coupling station 7a along a guide frame 23 installed in the space above the exchange station 7d. The traveling frame lea is reciprocated between
A transfer jig 18b, which includes a plurality of gripping members for gripping the front component W1m, is vertically suspended via a longitudinal column 16c so as to be vertically movable, and the traveling frame 16a is returned to the supply position. By lowering the transfer jig 16b, the front component W1. is received by the transfer jig 16b, and then the transfer jig 16b is raised to move the traveling frame 16a to the joining station 7a, and the jig teb is lowered to the rear of the setting jig I4. The front component WIA was mounted.

As shown in FIGS. 5 and 6, the transfer means 17 and 18 for the front floor Wlb and the taker floor W1° are 2.
The front floor W1. is transported from the floor section 2 to 21 supply positions in the front and back above the placement part of the welding robot 15 on one side of the joining station 7a by transport means 24 and 25, which will be described in detail later. Torya floor W1. The transfer means are configured to be placed on the setting jig 14, and the respective transfer means are placed on each side of the support frame 26, which is erected so as to straddle the placement part of the front welding robot 15 on the other side of the joining station 7a. 17.18 was installed so that it can be raised and lowered freely.

Rear floor W1. The transfer means 18 for
As shown in the figure, a movable frame 18c that can be freely shifted above and to one side of the coupling station 7a is attached to an elevator frame 18a that is provided on the front side of the support frame 26 so that it can be raised and lowered freely. Attachment: A longitudinal support frame Hid is attached to the lower surface of the movable frame 18e so as to be movable back and forth, and a transfer jig 18e including a plurality of gripping tools for grasping the rear floors W and c is suspended from the support frame 1111d. The lift frame 18a is raised and lowered by a motor 18f mounted thereon via a rack and pinion mechanism consisting of a pinion (not shown) interlocked with the lift frame 18a and a rack 18g fixed to the support frame 26. At this position, the movable frame 18e is shifted to one side by the cylinder 18h on the elevating frame 18a, and the transfer jig 18e receives the floor W1° that is transported by the transport means 25 to the supply position above the - side. Next, movable frame 1
8c is returned to the position facing above the coupling station 7a, and the support frame 18d is moved rearward via a rack and pinion mechanism consisting of a pinion 18j that is interlocked with the motor 18i on the movable frame 18c and a rack 18 on the support frame 18d. and move the rear floor W1o so that its trailing edge is the front floor W0. The rear floors W and t were placed on the setting jig 14 by lowering the elevating frame 18a in the second state. 18F in the diagram is the elevator frame 18
This is a balance cylinder connected to A via a chain 18m.

The configuration of the transfer means 17 for the front floors W and Th is also almost the same as the transfer means 18 described above, and corresponding components are designated with the same alphabetical numeral 17 as the numeral 18.
, and the explanation thereof will be omitted.

In the second floor portion 2, an elevator opening 27 is formed on the floor located above one side of the joining station 7a, and each processing line 9,
Front floor W1 and rear floor W processed in 10
The parts consisting of LE are conveyed by means of respective conveying means 24, 25 through said elevator shaft 27 to said respective supply position above one side of the joining station 7a.

Each of the conveying means 24 and 25 includes a pair of stacked stockers 28 vertically disposed in front and rear of the elevator opening 27, and each stocker 28.
Each drop lifter 29 is raised and lowered between a position directly below the 10 and each supply position, and each loader device supplies each part W, , W, c processed in each processing line 9.10 to each stocker 28. 30, each of the parts W, ..., Wo, is lowered to one stage in each stocker 28, and the lowermost part is lowered to each supply position by each drop lifter 29, and each transfer means is moved as described above. It was set to be delivered on 17.18.

Each stocker 28, as shown in FIGS. 9 to 11, has a pair of left and right vertical frames 28b, 28b fixed to a beam frame 28a constructed to straddle the entrance 27, and which pass through the entrance 27. A pair of fixed bars 286.28d each having hooks 28c for receiving parts attached in multiple stages above and below are attached to each line frame 28b, and a pair of guide bars 2 fixed to each line frame 28b are attached.
A pair of U-shaped movable bars 28g, 28g with hooks 28f for receiving parts attached in multiple stages above and below are supported on 8e, 28e so as to be able to rise and fall freely, and an elevator opening is provided between the upper ends of both vertical frames Hb, 28b. The transmission shaft 2 is chain-driven via a reducer 28i by a motor Hh arranged at the front and rear edges of the transmission shaft 27.
A rotating shaft 28k connected to each end of the transmission shaft 28j via a bevel gear is supported on each vertical frame 28b, and a pair of sprockets 28g, 28 are attached to the rotating shaft 28k.
A cross bar 281m is fixed to each sprocket 28N, and one end is horizontally installed between the movable bars 28g, 28g.
A chain 28o whose other end is connected to a balance weight 28n is hung, and a total of four movable bars 28g, one pair each on the left and right, are raised and lowered synchronously by forward and reverse rotation of a motor 28h. The hooks 28c and 28f are made to be able to freely swing inward and outward, and the parts are lowered to one stage by the vertical movement of the movable bar 28g and the swinging of these hooks Hc and 28f, and the parts are placed in the stocker 28 in multiple stages. Made it possible to stock it.

Each of the drop lifters 29 is shown in FIGS. 3, 5, and 6.
As shown in the figure, the coupling station 7a is supported in a vertically movable manner by a pair of columns 29a standing upright on one side of the coupling station 7a.
A chain 29e is provided with a sprocket 29d on a rotating shaft 29c driven by a chain by a chain 9b, and the sprocket 29d is connected to a drop lifter 29 at one end and a balance weight (not shown) housed in a column 29a so as to be movable up and down at the other end. Thus, the drop lifter 29 can be moved up and down by forward and reverse rotation of the motor 29b, and when the movable bar 28g of each stocker 28 is lowered, the parts supported by the lowermost hook 28f are lifted up from each drop in the raised position. It is placed on a jig 291' on the lifter 29.

As shown in FIGS. 5 and 6, each of the loader devices 30 uses a cylinder 30d to raise and lower a jig 30e for gripping parts onto a traveling frame 30b that travels along an upper guide frame 30a spanning the elevator opening 27. By moving the traveling frame 30b laterally and lowering the jig 30c, the payout device 9a is connected to each processing line 9.10.
, 10a are received by the jig 30c, and then the jig 30c is raised to move the traveling frame 30b to each stocker 28.
After moving to the upper position, the jig 30c was lowered to place each component on the uppermost stage of each stocker 28.

According to this implementation, each processing line 9 on the second floor section 2
, 10 processed front floor w1゜rear floor W1. are supplied to the welding robot 15 on one side of the joining station 7a in a spaced state in the front and back through the loader device 30, stocker 28 and drop lifter 29 of each transfer means 24, 25, and then each transfer Means 17.
Ht transfer jig 17e.

18e receives the front floor W11 and the rear floor wlc and shifts to a position above the coupling station 7a, and at the same time the front component w1. is transported by the transfer means 16 to a position above the combination station 7a, and then the transfer jig 16b of the transfer means 16 is lowered to place the front component WaS on the rear part of the setting jig 14 on the combination station 7a. At the same time, the lifting frame 18a of the transfer means 18 is lowered and the transfer jig 18e is moved rearward by the movement of the support frame 18d, and the rear floor W1g is placed on the front part of the set jig 14. As the elevating frame 17a of the loading means 17 descends, the transfer jig 17e moves rearward due to the movement of the support frame 17d, and the front floor W 1b
The front and rear edges of the front component W3. The front floor W1. is placed in the middle of the separator jig 14. After that, the positioning member 1 on the front and back jig 14 is
4a allows the front component W3. , front floor W11, and rear floor W1 are accurately positioned in a predetermined positional relationship, and in this state, the welding robot 15
The three parts are welded together, and then the floor W is assembled by welding the lights at multiple lighting stations 7b and 7c.

The vehicle body assembly line 8 includes a floor transfer station 8a adjacent to the lighting addition station 7C at the end of the floor assembly line 7, a roof transfer station 8b, a vehicle body assembly station 8C, an idle station 8d, and two stages, front and rear. It is equipped with an additional lighting station 8e's 8r and a delivery station 8g, and a pair of welding devices 31, 31 are arranged on both sides of the vehicle body assembly station 8C, as shown in FIGS. 12 to 14. A floor loading device 32 is reciprocated on the line between the floor transfer station 8a and the body assembly station 8C, and a ceiling-suspended roof is reciprocated between the roof transfer station 8b and the body assembly station 8C. A loading device 33 is provided, and the floor W1 assembled as described above is sent from the multiple lighting station 7C to the floor transfer station 8a by the transfer device 20 on the floor assembly line 7, and is placed at the station 8a or placed on the lid 35. At the station 8a, the floor loading device 32 is installed via the lifter 35.
At the same time, the roof w3, dash board upper W4, and rear tray w5 are transferred to the roof loading device 33 at the transfer station 8b by the transfer machine 36 disposed on one side of the roof transfer station 8b. ,
The respective input devices 32 and 33 allow the floor W1 and the roof W
3. The three workpieces of the dash board upper W4 and the rear tray W are transported to the vehicle body assembly station 8c, and the left and right side panels W2. W2
are welded to the floor W1 and the three-point workpiece to assemble the car body W, and the assembled car body W is transported to the forward lighting stations 8e and 8f via the idle station 8d by the transfer device 37 for delivery. did.

As shown in FIG. 14, each welding device 31 has a jig base 31e facing inward between a pair of front and rear columns 31bBib on a slide table 31a provided at the side of the vehicle body assembly station 8c and movable laterally. A welding jig 31d is removably attached to the front surface of the jig base 31c, and when the welding jig 31d is inverted to the outward position, Set the side panel W2 on the welding jig 31d via the preset jig 38a provided in the preset device 38, and assemble it to the floor W1 and the three-point workpiece by reversing the welding jig 31d to an inward posture. The welding gun 31e includes these in the welding jig 31d.
It was possible to join by welding.

The floor loading device 32 is a floor transfer station 8.
The rails run along a track frame 32a laid between the track frame 32a and the vehicle body assembly station 8c, the details of which are shown in FIGS. 16 to 19. A running frame 32e having a pair of front and rear leg pieces 32d, 32d that engage with the running frame 32b via a plurality of rollers 32e, a sliding frame 32f supported by the running frame 32e so as to be movable back and forth, and the sliding frame 32f. A floor support frame 32g is supported on a frame 32r so as to be movable back and forth, and a hydraulic motor 32j having a pinion 321 on an output shaft that engages with a rack 32h on a track frame 32a is mounted on a traveling frame 32e.
A vertical shaft 32. driven by the motor 32j through a gear 32k. & is pivotally supported, and the pinion 32 engages with a rack 32Il fixed to a sliding frame 32f at the upper end of the shaft 32iJ.
rack 32o, which is attached to the sliding frame 32f, the upper surface of the traveling frame 32e, and the lower surface of the floor support frame 32g;
According to the operation of the hydraulic motor 32j, the running frame 32e moves on the track frame 32a by the rack 32h and the binion 32i, and the sliding frame 32r moves on the rack 32. Aya to Binion 32
n to the traveling frame 32e, and at this time the binion 3
The workpiece support frame 32g is moved relative to the sliding frame 32r via the workpiece support frame 32p, and both stations 8 are attached to the workpiece support frame 32g.
A high-speed reciprocating motion between a and Bc is provided.

Then, when the floor loading device 32 is returned to the floor transfer station 8a, the lifter 35 is lowered to place the floor W1 on the floor support frame 32g, and then the floor loading device 32 is moved toward the vehicle body assembly station 8C. Then, the floor W1 was put into the station 8C. If there is a delay in unloading the vehicle body W from the vehicle body assembly station 8C, the roof transfer station gb is used as an idle station and the floor loading device 32 is placed on standby there.

The roof loading device 33 is a traveling frame that is reciprocated between the roof transfer station 8b and the vehicle body assembly station 8c along a guide frame Ha vertically installed on the ceiling of the line so as to straddle the roof transfer station 8b and the vehicle body assembly station 8C. 33b, and on the lower surface of the traveling frame 33b, a pair of front and rear first setting jigs 33c, 33c for holding the roof W3, a second setting jig 33d for holding the dash board upper W4, and a rear tray are provided. W.

A third setting jig 33e for holding the parts is suspended so as to be able to rise and fall freely.After the traveling frame 33b is moved to the vehicle body assembly station 8C, each setting jig 33e, 33d,
33e is lowered, and each work W.

W 4 and W 5 were inserted and set from above between the side panels W 2 and W 2 on both sides held by the welding jigs 31d and 31d.

The transfer machine 36 carries three-point workpieces W, , W4 . The pallet 39 on which W is placed in the required positional relationship is entered into the transfer station 8b from the side, and when the traveling frame 33b returns to the station 8b, the respective setting jigs 33c, 3
3d and 33e, each work W3. on the pallet 39. W4.
It is configured to deliver W5. To explain this in more detail with reference to FIGS. 20 to 22, the transfer machine 36 is mounted on a base frame 36b on a machine stand 38a provided on the side of the roof transfer station 8b by means of a cylinder 3[ie]. A slide frame 36d that is moved laterally is placed on the slide frame 3.
A receiving frame 36e supporting a pallet 39 is slidably supported laterally on the receiving frame 36d, and a pair of chains 36g and 38g, each of which has one end connected to a fixed piece 36f on the lower surface of the receiving frame 36e, is attached to the sliding frame 3 [id]. Each sprocket 3 pivoted on both ends
6h, and the other end of each chain 38g is connected to a fixed piece 36i on the base frame 36b, and as the slide frame 3ed advances and retreats, the receiving frame 3θe moves to the advanced position within the transfer station 8b. It was made to advance and retreat at double speed to the retreating position on the side.

As shown in FIGS. 24 and 25, the pallet 39 has a plurality of holders 39b, 39c, and 39d for the roof W, dash board upper W4, and rear tray W attached to a framed pallet main body 39a. As shown in FIG. 15, the pallet 39 is lowered from the second floor section 2 by a drop lifter 40 that moves up and down along a support 40a erected outside the transfer machine 36, and then moved out. It was arranged to place it on the receiving frame 3Be located at the same position. The receiving frame 38e and the drop lifter 40 each have one pair of bottle holes 39e and 39f formed in the pallet 39.
A pair of locate pins sej, 40b are set up,
The pallet 39 can be positioned and placed on the receiving frame He and the drop lifter 40.

The locating pin 36j on the receiving frame 36e is connected to the clamp claw 38 which is tilted by the cylinder 38, as shown in FIG.
1), and the seat plate 39 on the lower surface of the pallet 39 has a bottle hole 39e formed by the clamp claw 3611.
The locating pin 40b on the drop lifter 40 was configured in the same way.

As shown in FIG. 2(b) and FIG. 15, an elevator opening 41 is provided on the floor of the second floor portion 2, and is located above the placement area of the transfer machine 36. , for the roof W3 and for the dash board upper W so as to straddle the elevator opening 41.
4 and rear tray W, each loader device 42.43.4
4 and the pallet 39 is raised to the second floor section 2 through the elevator opening 41 by the drop lifter 40, and the roof W3 is installed on the second floor section 2.
The dash board upper W4 is placed on the pallet 39 via the loader device 42 from the end of the dash board 2.
The pallet 39
On the other hand, since the rear tray W has a single-plate structure and does not require a processing line, the rear tray W is placed manually on a mounting table (not shown).
, and placed on the pallet 39 by the loader device 44.

In the figure, 45 indicates a stock frame installed in the space above the ceiling of the vehicle body assembly line 8, and the welding jig 3 is attached to the stock frame 45.
A plurality of frames 46 for removably holding the stock frames 45 are mounted, and a crane device 47 installed on the upper surface of the stock frame 45 is used to lift the frames 46 through an elevator opening 45a opened in the ceiling of the vehicle body assembly station 8c. is lowered to the station 8c, and the pedestal 46 and the welding devices 31.3 on both sides are lowered to the station 8c.
The welding jigs 31d and 31d were delivered to and from the company 1, so that the jigs could be exchanged when changing models. still,
In order to prevent the frame 46 from interfering with the guide frame 33a of the roof loading device 33 when the frame 46 is raised and lowered, the guide frame 33a is movable in the front and back direction so that it can be retracted from the elevator opening 45a.

Next, the means for assembling the vehicle body W in the vehicle body assembly line 8 will be explained. First, in the second floor section 2, the loader device 42
, 43. After setting the three workpieces, roof W1, dash board upper W4, and rear tray W, on the pallet 39 in the required positional relationship, the pallet 39 is lowered by the drop lifter 40, and the transfer machine is at the withdrawal position. The pallet 39 is placed on the receiving frame He of No. 36, and then the receiving frame 36e is moved forward to the advancing position by the operation of the transfer machine 36, the pallet 39 is advanced into the roof transfer station Bb, and the pallet 39 is returned to the station 8b. Each workpiece is delivered to each setting jig 33c, 33d, 33e of the device 33, and the floor W is delivered to the floor loading device 32 at the floor transfer station 8a. The point workpieces are transported to the vehicle body assembly station 8c, and the side panels W2.
W2 is joined to the floor Wl from both sides, and the three-point workpiece is attached to the side panel W2. Insert and set between W2 from above and weld and connect them.

On the other hand, after transferring the work to the roof loading device 33, the transfer machine 3B returns the empty pallet 39 to the side of the roof transfer station 8b by returning the receiving frame 36e to the withdrawal position, and then returns the empty pallet 39 to the side of the roof transfer station 8b. is lifted, the pallet 39 is lifted from the receiving frame 36e and elevated to the second floor section 2, and in parallel with the welding work at the car body assembly station 8c, the next three workpieces are loaded onto the pallet 39 by the loader device 42, 43, 4.
4, and the vehicle body W is assembled continuously by repeating the above operations.

The left and right side panels w2, w2 are connected to the left and right outer parts of the vehicle body assembly station 8c from the side panel processing line 13.13 provided on the second floor 2 through a lift opening 48 provided on the floor of the second floor. is lowered by a drop lifter 49 (see FIG. 1), and this side panel w2 is manually set in the preset jig 38a, and the side panel w2 is delivered to the welding jig 31d via the jig 38a. .

As shown in FIGS. 1 and 2(a), the vehicle body W assembled at the vehicle body assembly station 8c is conveyed to the payout station 8g via the idle station 8d, the lighting stations Be and Sr, and is dropped from the payout station 8g. The light is lifted up by the lifter 5o and sent out to the aerial conveyance path 51 leading to the multiple lighting line 4. Next, the vehicle body W is put into the lighting line 4 via the drop lifter 52 at the starting end of the lighting line 4, and after welding the various parts of the vehicle body in the line 4, The vehicle body W is sent to the aerial conveyance path 54 leading to the post-process line 5 via the drop lifter 5 at the starting end of the line 5.
The vehicle body W is put into the line 5 via the line 5.

(Effects of the Invention) As is clear from the above description, according to the present invention, there is a processing line for floor parts on the second floor, an intervention/pushing line for roof parts, and a dash board upper as in the invention of claim 2. By installing a processing line for parts, parts such as floor components and roofs processed on these processing lines can be simply lowered from the second floor, and the floor assembly line and vehicle body assembly station installed on the first floor can be easily lowered. Each part can be transported to each predetermined parts supply position in the vicinity of the area, and a processing line for each part and a logistics system from there to the supply position of each part can be constructed in a rational and space-efficient manner by utilizing three-dimensional space.
Furthermore, if a processing line for side panels is further provided on the second floor as in the invention of claim 3, it is possible to space-efficiently arrange lighting lines etc. on both sides of the main line on the first floor. has.

[Brief explanation of the drawing]

Fig. 1 is an overall perspective view of the IPJ of the system of the present invention, Fig. 2 (a) and (b) are plan views of the first and second floor parts, respectively, Fig. 3 is a plan view of the floor assembly line, and Fig. 4 is r in Figure 3
5 and 6 are cross-sectional views taken along lines v-V and Vl-Vll in FIG. 4, respectively. An enlarged side view, FIG. 8 is a front view of the rear floor transfer means seen from the right side of FIG. 7, FIG. 9 is an enlarged plan view of the opening location of the front floor and rear floor entrances on the second floor, 10 and 11 are cross-sectional views taken along lines X-X and XI-XI in FIG. 9, respectively. FIG. 12 is a plan view of the car body assembly line, FIG. 13 is a side view thereof, and FIG. FIG. 13 is a front view taken along the line XIV-XIV, FIG. 15 is a front view taken along the line W-W in FIG. 13, FIG. 16 is a plan view of the floor loading device, and FIG.
The side view seen from the X■-X■ line in Figure 6, and Figure 18 is the 17th
An enlarged cross-sectional view along the line X■-X■ in the figure, Figure 19 is the
Figure 20, a cross-sectional view taken along the line IX-XIX, is xx- in Figure 13.
21 is a plan view thereof, 22 is a right side view of 20, 23 is a cross-sectional view taken along the line xxm-xxm in 22, 25 is a plan view of the pallet, FIG. 25 is a sectional view taken along line xxv-xxv in FIG. 24, and FIG. 26 is an exploded perspective view of the vehicle body. W...Vehicle body Wl...Floor Wl,...Front component W1. ...Front floor WlC...Rear floor Wl...Side panel W3...Roof W4...Dashboard upper W5...Rear tray...1st floor part 2''2...2nd floor part 3...・Main line 6... Front component processing line 7... Floor assembly line 8... Body assembly line 8c... Body assembly station 9... Front floor processing line 10... Rear floor processing line 11...・Roof processing line 12... Datsushi board upper processing line 13...
Side panel processing line 31...Welding equipment 31d...Welding jig No. 2 b) 7/10 Fig. 10 Fig. 18 Summer'' Fig. 19 2a

Claims (1)

[Claims] 1. In a system for assembling an automobile body by joining a floor, side panels, and roof, a first floor portion and a second floor portion are provided, and a welding method is provided in which a side panel can be freely set on the first floor portion. A vehicle body assembly station with welding equipment equipped with tools placed on both left and right sides, and a floor assembly line upstream of the station,
Furthermore, a main line including a floor parts processing line for processing some of the floor components is placed on the upstream side.
A separate floor parts processing line and a roof processing line are placed on the second floor to process the remaining floor components, and the floor components processed by the floor parts processing line located on the second floor are lowered from the second floor to a floor assembly line, and in the floor assembly line, the component parts and the floor component parts transported from the floor parts processing line arranged on the first floor are combined to assemble the floor, The roof processed on the roof processing line is lowered from the second floor to the vicinity of a car body assembly station, and is fed into the car body assembly station, and the roof and the floor that is fed into the car body assembly station from the floor assembly line are welded together. An automobile body assembly system characterized in that the automobile body is assembled by combining side panels set on a jig. 2. The automobile according to claim 1, wherein a side panel processing line is provided in the second floor section, and the side panel processed on the processing line is lowered from the second floor section and set in the welding jig. Vehicle body assembly system. 3. A processing line for insert parts such as dashboard uppers to be inserted between the left and right side panels will be installed on the second floor, and the insert parts will be lowered together with the roof from the second floor near the vehicle body assembly station. 2. The automobile body assembly system according to claim 1.