JPH0829736B2 - Car body parts loading method to the car body assembly station - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a method for carrying a vehicle body component into a vehicle body assembly station, which is suitable for use in an assembly line of an automobile body.

(Prior Art) A conventional automobile body assembly line is, for example,
There is one shown in FIG. 25, and this line is equipped with work stations S _{1 to} S ₁₃ and a shuttle conveyor 2 for tact-transporting car body parts and assembled car bodies by a shuttle bar 1 between the work stations. There is.

Then, in this line, the floor main is carried into the work station S ₁ by the drop lifter 3, the floor main is carried into the work station S ₂ by the shuttle bar 1, and the rear panel is carried into the station S _2. The floor main and rear panels are carried into the work station S ₃ which is a vehicle body assembly station by the shuttle bar 1 and the station S ₃
The left and right body sides are carried in by the drop lifter 4, and then the air box and the rear waist are carried therein by the loaders 5 and 6, respectively, and at the station S ₃ , two slide back devices located on both sides of the line are installed. By 7,
The left and right body sides are positioned with respect to the floor main, and the air box,
The rear estate and the rear panel are respectively positioned with respect to the floor main, and the body parts thereof are spot-welded to each other and joined by a multi-spot welding machine or a spot welding robot (not shown), thereby roughly assembling the vehicle body.

After that, the above-assembled vehicle body is sequentially transported to the work stations S _{4 to} S ₁₃ by the shuttle bar 1, while the roof rail carried by the loader 8 to the work station S ₆ is spot-welded to the vehicle body at the work station S ₆ to the work station S ₁₀ . The roof carried in by the loader 9 is spot-welded there, and the spot welding robot 10 additionally performs spot welding at the work stations S ₄ , S ₅ , S ₈ , and S ₁₁ to enhance the rigidity of the vehicle body. the drop lifter 11 in S _13, to unload the assembled body to the outside line.

(Problems to be Solved by the Invention) However, in the above conventional line, after the floor main is carried into the work station S ₃ for assembling the vehicle body, left and right body sides which are large vehicle body parts,
It is necessary to carry in other vehicle body parts such as an air box, a rear waist, a rear panel, etc. for connecting them to each other so that they do not interfere with each other, and then position and weld the vehicle body parts. Therefore, there is a problem in that the work at the vehicle body assembly station S ₃ is troublesome and the tact time of the entire vehicle body assembly line is delayed.

In order to solve this problem, at the work station before the vehicle body assembly station, position the left and right body sides with respect to the floor main on the shuttle bar so that the flange parts of the hand vice, press joint, or those body parts are It is also proposed to temporarily fix the left and right body sides to the floor main by hemming bending, etc., and then carry in the floor main and body side together to the body assembly station in that state. There are problems that the number of steps to be performed increases and it becomes difficult to maintain the assembly accuracy of the vehicle body, and that extra man-hours such as attaching and detaching the hand vice and bending hemming are required.

The present invention provides a method for carrying in a vehicle body component that advantageously solves the above-mentioned problems.

(Means for Solving the Problems) A method of loading a vehicle body component to a vehicle body assembly station according to the present invention is such that when loading a floor main and left and right body sides to a vehicle body assembly station of a vehicle body assembly line, A shuttle conveyor having three shuttle bars that can be reached from the same side of the car body assembly station in parallel with each other is laid on the car body assembly station, and the floor main is installed on the central shuttle bar among the three shuttle bars. On the other hand, the left and right body sides are respectively placed side by side on the floor mains on the shuttle bars on both sides, and then the three shuttle bars are simultaneously advanced based on the operation of the shuttle conveyor to move the floors. Main and left and right body sides to the body assembly station The feature is that they are collectively loaded from the same side of the vehicle body assembly station.

Further, in the present invention, on at least one of the floor main and the left and right body sides mounted on the three shuttle bars, another vehicle body component for mutually connecting the floor main and the left and right body sides is provided. Then, the three shuttle bars are simultaneously moved forward so that the floor main, the left and right body sides and other body parts are placed in the body assembly station on the same side of the body assembly station. It is also possible to carry in from one at a time, and the left and right body sides placed on the shuttle bars on both sides are set so as to be hung on the side of the floor main placed on the central shuttle bar. Is also good.

(Operation) According to this method, the three shuttle bars are arranged on the floor main with the left and right side bodies, which are large body parts, and are carried together with the floor main from the same side of the car body assembly station into the car body assembly station. Therefore, other body parts can be easily carried in to the body assembly station while avoiding interference with those body parts.Floor main and left and right body sides are pre-aligned, so the left and right body parts The side can be easily positioned, so that the working time at the vehicle body assembly station can be shortened and the tact time of the entire vehicle body assembly line can be shortened.

Moreover, in this method, the car body parts are transported by three shuttle bars, so at the car body assembly station and the previous work stations for loading the floor main and left and right body sides, the floor main, left and right body sides, and further The vehicle body can be lifted by the lifting device that is lifted from between the center and the shuttle bars on both sides, and the shuttle bar can be moved backward. Therefore, if it is easy to install the lifting device for the body parts at each work station. Can be tightened.

In addition, on at least one of the floor main and the left and right body sides placed on the three shuttle bars, other body parts for joining them are placed at their mounting positions, and the other If the car body parts are also collectively carried in from the same side of the car body assembly station, the time required for carrying the car body parts into the car body assembly station and positioning the car body parts can be further shortened.

Also, if the left and right body sides placed on the shuttle bar are also attached to the sides of the floor main also placed on the shuttle bar, the left and right body sides can be brought into close contact with the floor main. The amount of movement of the positioning jig can be reduced, the time required for positioning can be further shortened, and the left and right body sides can be held by the shuttle bars on both sides with a simple configuration.

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

1 (a) and 1 (b) are a plan view and a side view showing a vehicle body assembly line to which an embodiment of a method for carrying in vehicle body parts to a vehicle body assembly station of the present invention is applied, and these lines are, respectively, together comprise a working station St ₁ ~St _10, shuttle conveyor 21 for conveying the vehicle body parts and the assembled body between their work station St ₁ ~St ₁₀
Including mixed production of multiple types of car bodies, such as sedans, hardtops, coupes, etc.

The shuttle conveyor 21 here has a long central shuttle bar 22, and extends parallel to the shuttle bar 22 on both sides of the shuttle bar 22 and has a rear end (right end in the figure) of the shuttle bar 22. A short shuttle bar 23 connected to the rear end of 22 and a pinion (not shown) of a drive unit 24 arranged between the work stations St ₈ and St ₉ is provided on the central shuttle bar 22. A rack
By driving 25 of them three shuttle bars 2
2,23 the distance between adjacent work stations,
It is possible to move back and forth in conjunction with each other (the backward position is shown in the figure). By this forward / backward movement, the central shuttle bar 22 can carry out tact transfer between the respective stations of the work stations St _{1 to} St ₁₀ , and the shuttle bars 23 on both sides of the work stations St _{1 to} St ₅ of the work stations St _{1 to} St ₅ . Tact can be loaded between stations.

The three shuttle bars 22 and 23 are, as shown in FIGS. 2A and 2B, two elongated plate-like members 22.
The a and 23a are connected in parallel to each other, and are supported and guided from below and sideways by the guide rollers of a large number of support posts 26 arranged with gaps therebetween, and the tact conveyance is performed on a predetermined path.

In the vehicle body assembly line of this example including the shuttle conveyor 21, at the first work station St ₁ , the floor main A is placed on the central shuttle bar 22 so that the front of the vehicle body faces the front of the line. At the rear of the floor main, the rear panel B is placed over the three shuttle bars 22 and 23.

Here, the floor main A is placed by being assembled on an assembly line provided at another place by lowering it from above the shuttle bar 22 with the drop lifter 27, and the rear panel B is placed behind the line. The parts taken out from the pallet 28 at the rear panel assembling place P ₁ provided on the side of the end are assembled on the rear panel assembling jig 29 and conveyed by the belt conveyor 30 to the rear end of the line. Further, after the parts are assembled using the rear panel assembling jig 31, the parts are transferred and placed.

The next work station St ₂ is an idle station for backup. At the next work station St ₃ , first, the left and right body sides C are placed on the shuttle bars 23 on both sides side by side with the floor main A, and then placed. The air box D is placed on the front part of the floor main A, and the rear waist E is placed on the rear part of the floor main A.

FIGS. 2 (a), (b) and (c) are a plan view, a front view and a side view of the work station St ₃ , showing the mounting state of the left and right body sides C, where the left and right body sides C are shown. Each of them is assembled on an assembly line provided at another place and is hung on a hanger 32 of an overhead conveyor and conveyed above the side part of the vehicle body assembly line, where it is suspended on the hanger 32 by a drop lifter 33. After lowering, only the body side C is
It is received by the body side receiving jig 35 of the body side transfer device 34 provided on the side of, and moved by moving the body side receiving jig 35 in the direction of approaching the shuttle bar 23.

In order to perform the above placement for each of multiple types of vehicle bodies,
In the body side transfer device 34 here, a jig frame 37 is erected on a base 36, and the jig frame 37 is shuttled by a ball screw type reciprocating mechanism 39 driven by a servo motor 38. The bar 23 can be moved forward and backward relative to it, and the jig frame 37 can receive the respective body side receiving positions, for example, the front part a, the central part b, the rear fender part c, and the like as shown in FIG. 2 (c). Two locations on the side sill part d, e
The body side receiving jigs 35 are attached to the respective positions corresponding to the body side receiving jigs 35, and the body side receiving jigs 35 correspond to the body side shapes of the vehicle body types at the body side receiving positions a to e. An air cylinder 41 provided with two receiving members 40, two for each receiving member, allows selective advancement to the use position, and, in addition, air for cooperating with each receiving member 40 to grip and release the body side. A cylinder drive clamp mechanism 42 is provided.

In this body side transfer device 34, the receiving member 40 corresponding to the type of the body side C to be received is arranged at the use position by each body side receiving jig 35 as shown in FIGS. 2 (a) and 2 (b). By gripping the body side C that has descended there by the cooperation of the receiving member 40 and the clamp mechanism 42, the body side C is received from the hanger 32, and then the reciprocating mechanism 39 is moved by the servo motor 38. By driving the jig frame 37 forward toward the shuttle bar 23, the body side C is roughly positioned at a predetermined assembly position on the shuttle bar 23 with respect to the floor main A, and further positioned there. In this state, the clamp mechanism 42 is released to move the body side C to the shuttle bar 23.
Place it alongside the floor main A on the shuttle bar 22. In FIG. 2 (b), the drop lifter 33 and the body side transfer device 34 for the left body side C are omitted.

On the other hand, the shuttle bars 23 on both sides here are
In order to be able to hold multiple types of body side C between work stations St _{3 to} St ₅ , with it retracted,
For example, FIG. 2 (c) at the work stations St ₃ and St ₄ .
The front and rear parts f of the side sill part of the body side C, as shown in
Body side receiving jigs 43 and 44 at the positions corresponding to g
The body side receiving jig 43 has a plurality of receiving members 45 corresponding to the shape of the side sill portion for each type of vehicle body at the body side receiving position f, and two receiving members 45 are obliquely arranged for each receiving member. Unlike the body side receiving jig 35, it does not have a clamp mechanism, and the body side receiving jig 44 also has a body side receiving jig. At position g,
A plurality of receiving members 47 corresponding to the shape of the side sill portion for each type of vehicle body can be selectively raised to a use position by two air cylinders 46 diagonally arranged for each receiving member. I don't have it.

The central of the shuttle bar 22 in this case, in order to allow the holding of a plurality of types of floor main A of between working station St ₁ ~St _10, in a state where it is retracted, the working station St ₁ ~St ₉ For example, the front end portion h of the floor main A as shown in FIG.
The floor main receiving jigs 48 to 51 are provided at the positions corresponding to i, j, and the rear end portion k, respectively. The floor main receiving jigs 48 are the floor main receiving jigs h at the floor main receiving position h for each type of vehicle body. A plurality of receiving members 52 corresponding to the main shape can be selectively raised to a use position by two vertically arranged air cylinders 46 for each receiving member. Floor main receiving jig 49 ~
Also in 51, a plurality of receiving members 53 to 55 corresponding to a plurality of types of floor main shapes at the respective receiving positions i to k are selectively set to operating positions by two air cylinders 46 like the floor main receiving jig 48. It does not have a clamp mechanism if it can be raised.

In the floor main receiving jigs 48 to 51 included in the shuttle bar 22 described above, the receiving members 52 to 55 having a shape corresponding to the type of the floor main A to be held are arranged at the use position by the selective operation of the air cylinder 46. By the way, floor main A
The center portion of the vehicle is surely supported according to its shape, whereby the floor main A can be held on the shuttle bar 22 without being displaced or deformed, and the body side included in the shuttle bar 23 can be held. The receiving jigs 43 and 44 are the receiving members 4 having a shape corresponding to the type of the body side C to be held.
By arranging 5, 47 in the use position by selectively operating the air cylinder 46, the side sill portion of the body side C is surely supported according to its shape, and thereby the body side C is positioned on the shuttle bar 23. It can be held without causing displacement or deformation. Moreover, since the body side receiving jigs 43, 44 here support the bottom and side portions of the side sill portion from diagonally below, the body side C placed by the body side transfer device 34 is placed on both sides of the floor main A. Can be held so as to be held at a predetermined position.

Rear panel B at work stations St _{1 to} St ₄
2 (a), the work stations St _{1 to} St are operated with both shuttle bars 22 and 23 retracted.
_The shuttle bar 22 has a rear panel receiving jig 56, and the shuttle bar 23 has a rear panel receiving jig 57 at a position corresponding to the rear panel B in each of the _three. Similar to the side receiving jigs 43, 44, a plurality of receiving members 58, 59 corresponding to the rear panel shape for each type of vehicle body are selectively arranged at the use position by two vertically arranged air cylinders 46 for each receiving member. The rear panel B to be held is securely supported by the receiving members 58, 59 according to the type of the rear panel B, and the rear panel B is held on the shuttle bars 22, 23 without displacement or deformation. be able to.

The work station St ₃ is also shown in FIG.
As shown in (c), four floor main lifting devices 60 and two rear panel lifting devices are provided between the shuttle bars 22 and 23.
61, and four floor main positioning devices 62 are provided, and the floor main lifting device 60 and the rear panel lifting device 61 respectively correspond to a plurality of types of vehicle bodies like the floor main receiving jigs 48 to 51. By selectively elevating and lowering a plurality of receiving members by an air cylinder, the floor main A and the rear panel B, which have been carried into the work station St _3, are moved up and down, and the empty spaces of the shuttle bars 22 and 23 that have conveyed them. Retreat in the state of, and eventually the floor main
The tact transfer of the A and the rear panel B is made possible, and the floor main positioning device 62 comprises a location pin 64 standing on the wrist of the Cartesian robot 63.
Raise the locate pin 64 at a position according to the type of
The floor main A is positioned with respect to the station St ₃ by fitting it into the locating hole of No. ₃ , and the placement position of the floor main A on the shuttle bar 22 is made accurate.

In addition, in order to enable tact transfer between other stations of the floor main A and the rear panel B, the floor main lifting device 60 is provided not only at this work station St ₃ but also at work stations St ₂ , St _{4 to} St ₁₀ . In addition to this work station St ₃ , the rear panel lifting device 61 is provided
Working station St _2, is also provided on the St _4, and the other floor main positioning unit 62 includes the work station St _3, is also provided in the work station St ₄ ~St _10.

FIGS. 3 (a) and 3 (b) show a work station St in which the air box D and the rear waist E are placed.
_{3 is} a plan view and a side view of FIG. ₃ , in which the air box D is an air box assembly location provided on the side of the line.
Body type for each of the pallet 65 at P ₂ (FIG. 1 (a) see)
The parts taken out from the table top type multi-spot welding machine 66 are assembled, and the robot 67 grips them as shown by the phantom lines in the figure and transfers them to above the shuttle conveyors 22, 23, whereby the shuttle conveyors 22, The floor waist A and the body side C, which were previously placed on the 23, are roughly positioned at the predetermined assembly positions, and the rear waist E is also a rear waist assembly place P also provided on the side of the line. _The worker temporarily mounts the parts taken out from the pallet 68 (see FIG. 1 (a)) for each type of vehicle body on ₃ on the air waist assembly jig 69, and temporarily mounts them on the temporary stand 70. The robot 71 transfers the shuttle conveyors 22, 23 to above the shuttle conveyors 22, 23.
The upper floor main A and the body side C are placed at a predetermined assembly position in a roughly assembled position.

At the next work station St ₄ , the roof panels F are placed on the left and right body sides. This placement is performed from the pallet 72 for each type of vehicle body at the roof panel assembly place P ₄ as shown in FIG. A positioning jig provided on the lower end of the arm 75 of the loader 74 capable of transporting the taken-out roof panel main body and front and rear roof rails on the roof panel assembling jig 73 for each type of vehicle body in the direction orthogonal to the line. After being assembled to the roof panel F by being combined with each other by using the combined hand 76, the loader 74 transfers the roof panel F to above the shuttle conveyors 22 and 23 and to the predetermined assembly position on the left and right body sides C. This is done by roughly positioning.

In this work station St ₄ , between the shuttle conveyors 22 and 23, the floor main lifting device 60 described above is provided so as to enable the tact transfer of the left and right body sides C.
A body side lifting device having the same structure as that of is also provided.

The following work station St ₅ is a vehicle body assembly station. At this work station St ₅ , the floor main A, the rear panel B, the left and right sides, which are placed on the three shuttle bars 22 and 23 and carried in collectively, are installed. The body side C, the air box D, the rear waist E, and the roof panel F are joined to each other by spot welding to assemble the vehicle body G.

The assembly of the vehicle body G is performed by the vehicle body assembly apparatus 77, and the vehicle body assembly apparatus 77 here is the shuttle bar 2
In a rectangular parallelepiped frame 78 surrounding 2,23, a large number of Cartesian coordinate type positioning robots each having a work receiving jig corresponding to each of the above-mentioned vehicle body parts as a hand and a clamp mechanism as required, It is equipped with a large number of Cartesian coordinate type welding robots equipped with spot welding guns as hands. Here, each workpiece receiving jig is a body side receiving member with a receiving member shaped according to the type of vehicle body. An air cylinder similar to the jig 35, or a motor-driven selection mechanism can be used to make it exist at the position of use (for details, see, for example, the vehicle body assembling apparatus previously disclosed by the applicant in Japanese Patent Application No. 63-143478). checking).

However, the above-mentioned vehicle body assembly device 77 is
3 brought in the frame 78, the floor main A and the left and right body sides C hung on it, the air box D, the rear waist E, and the roof panel F placed on top of them. The floor main elevating device and the body side elevating position described above are lifted from above the shuttle bars 22 and 23 to a predetermined position, and together with this, the floor main positioning device positions the floor main A, and then a predetermined positioning robot moves the shuttle bars 22 and 23. Pick up the rear panel B from above, transfer it to the predetermined assembly position at the rear end of the floor main A and body side C, and position it there. At the same time, another positioning robot approaches from the surroundings and receives the work. With the jig and clamp mechanism,
The left and right body sides C, the air box D, the rear waist E, and the roof panel F are respectively positioned, and then the spot welding robot spot welds these vehicle body parts to each other to assemble the vehicle body G with a predetermined assembling accuracy.

At the next work station St ₆ , the assembly accuracy of the assembled vehicle body G is inspected by the vehicle body measuring device 79. The vehicle body measuring device 79 here has a large number of laser type on the rectangular frame 80 surrounding the shuttle bar 22. Distance measuring devices 81 are movably mounted, and the distance measuring devices 81 measure the distance to each part of the vehicle body G or the cross-sectional shape of each part to measure the assembly accuracy of the vehicle body G (for details, see For example, refer to the vehicle body measuring device previously disclosed by the applicant in Japanese Patent Application No. 62-313023).

Incidentally, the shuttle bar 23 of the side, the body since the side C is intended to convey to the working station St _5, come not only to the station St ₅ in the forward position, from the work station St ₆ above the center of the shuttle bar 22 Only the body G
Carry out.

The following work station St ₇ is a spare station used when the body assembly device 77 of the work station St ₅ fails, and at this work station St ₇ , the body positioning device with the welding robot removed from the body assembly device 77. Equipment 82 is a body assembly equipment 7 at work station St ₅
7. Position the body parts that have been assembled as far as possible by 7 or temporarily assembled with a hand vise or the like at work station St ₄ , and the operator assembles the body G by joining these body parts with a welding gun.

At the next work station St ₈ , three spot welding robots 83 equipped with a spot welding gun as a hand perform additional spot welding on the vehicle body G, and at the next work station St ₉ , further left and right hood ridges as body parts. The robot 84 takes out the reinforcement from the pallet 85 for each type of vehicle body and places it in the engine room of the vehicle body G. At the subsequent work station St ₁₀ , the assembled vehicle body G is lifted by the drop lifter 86. Take it out of the line.

4 (a), (c), (e), (g), and (i) are plan views showing a specific example of the shuttle conveyor 21 used in the above line, and FIGS. 4 (b), (d), (F), (h),
(J) is a side view of the shuttle conveyor 21. As shown, the shuttle conveyor 21 includes three shuttle bars 22,2.
In its retracted position as shown, the shuttle bars 23 on both sides extend to station St ₄ , and the central shuttle bar 22 to station St ₉ and, as shown in FIG. 13, work station St ₈ A rack 25 fixed along the shuttle bar 22 is driven by a pinion 24a of a drive device 24 disposed between the station and St ₉ to reciprocate by a distance between two stations adjacent to each other. And
The retracted position of the shuttle bars 22 and 23 is at work station St ₁
5 to 7 provided on the work station St ₁₀ , the forward position of the shuttle bars 22 and 23 is determined by the contact with a similar stopper 88 provided on the work station St _10. Identified by contact.

As is clear from FIGS. 5 to 7, the shuttle bar 22
Consists of two elongated plate-like members 22a connected in parallel to each other by a connecting member 22b in a ladder shape, and a shuttle bar 23
Similarly, two elongated plate-like members 23a are connected in parallel to each other by a connecting member 23b in a ladder shape. The shuttle bars 23 on both sides are connected to the shuttle bar 22 at their rear ends by a connecting member 21a.

Further, both shuttle bars 22 and 23 are attached to a large number of support posts 26 arranged at intervals as shown in FIG.
As shown in FIGS. 11, 11 and 12, a guide roller 26a rotatable about a horizontal axis and a guide roller 26b rotatable about a vertical axis are provided, and the shuttle bars 22, 23 are lowered by the guide roller 26a. Supported and guided from
By guiding the shuttle bars 22 and 23 from both sides by the guide rollers 26b, the shuttle bars 22 and 23 can be moved back and forth along a predetermined route. As shown in FIGS. 13 and 14, guide rollers 26a for guiding the shuttle bar 22 from above to ensure the meshing between the rack 25 and the pinion 24a are provided on the support posts 26 at the front and rear of the drive device 24. Is also provided.

Further, the shuttle bar 23 on both sides has a ninth
As shown in the figure, in order to maintain its height, the roller 23c
A pillar 23d having is provided.

In addition, the shuttle bar 22 at the center is shown in FIGS.
As shown in FIG. 15 and FIG. 15, engaging plates 90 capable of engaging with the damper 89 on the floor are respectively attached to both sides at the forward position and the backward position, and these engaging plates 90 and the rod 89a of the damper 89 are connected to each other. Due to the contact, the shuttle bars 22 and 23 are decelerated immediately before reaching the forward movement position and the backward movement position.

16 (a) and 16 (b) show a rear panel receiving jig 57 provided on the shuttle bar 23. As shown in FIG. 17, the rear panel receiving jig 57 includes an upper support plate 91 and an upper support plate 91. Forming a large number of through holes 91a and 92a in the lower support plate 92 so that the groups are alternately arranged in two groups, and the air cylinders 46 are fitted and fixed in the through holes. The upper and lower support plates 91, 92 densely support a group of two air cylinders, and the piston rods 46 of the two cylinders 46 of each group are supported.
It comprises an elevating device 94 constituted by connecting a to a common block 93.

Here, the elevating device 94 further includes a flat air cylinder 95 for locking each of the blocks 93. The air cylinders 95 are provided in each block 93 in parallel with the piston rod 46a and the upper support plate 91 is provided. Has a piston rod 95a that advances and retreats with respect to a rod 96 that passes through so that it can move up and down.
If the air pressure supply is interrupted for some reason when the 95a is retracted, the built-in spring action causes the piston rod 95a to
When the block 93 is in the raised position, the piston rod 95a is positioned below the rod 96, so that when the supply of air pressure to the air cylinder 46 is interrupted due to a failure or the like, the rod 96 Is stopped by the piston rod 95a to prevent the block 94 from falling.

The rear panel receiving jig 57 is configured by attaching a receiving member 59 for each type of the rear panel B to each block 93 of the lifting device 94 as shown in FIG. 57, a large number of receiving members 59 can be arranged in close contact with each other, and they can be selectively moved up and down by the operation of a pair of air cylinders 46, and the supply of air pressure can be improved. In case of interruption due to a failure, etc., the receiving member 59 in the raised position,
As a result, the rear panel B held there can be prevented from falling. The supply of air pressure to each set of air cylinders 46 can be performed for each set via the passages formed in the upper and lower support plates 91, 92.

FIG. 18 shows the rear panel receiving jig 56 provided on the shuttle bar 22, and FIGS. 19 to 22 show the floor main receiving jigs 48 to 51 also provided on the shuttle bar 22, FIGS.
The figure shows the body side receiving jig provided on the shuttle bar 23.
43 and 44 are respectively shown, and these are also lifted / lowered by the above-described lifter 94 or a lifter 97 having a configuration similar to that of FIG.
It can be prevented from falling.

According to the car body assembly line described above, mixed production of a plurality of types of car bodies can be performed, and further, according to the shuttle conveyor 21 in this line, three shuttle bars 2
Left and right body side C side by side with floor main A above 2,23
And the air box D, the rear waist E, and the roof panel F on them in a roughly positioned state, and these are also placed on the shuttle bar.
Since a large number of body parts including large body parts are carried into the work station St ₅ together with the rear panel B placed on 22, 22, 23, they can be easily and quickly carried into the car body assembly station without interfering with each other. It is also possible to position these vehicle body parts in a short time.

Here, since the left and right body sides C are carried on the side portions of the floor main A while being carried in, the left and right body sides C can be brought into close contact with the floor main A, and the vehicle body assembly device
77 positioning robots can be moved less and positioning time can be shortened.
The body side receiving jigs 43, 44 can be simply configured.

Furthermore, here, between the three shuttle bars 22 and 23,
Since the floor main lifting device 60, the rear panel lifting device 61, the floor main positioning device 62, and the body side lifting device are provided, these lifting devices can be easily installed.

Although the present invention has been described above based on the illustrated example, the present invention is not limited to the above-described example, and can be applied to, for example, a production line of a single vehicle type, and the same effects as the above can be obtained.

(Effects of the Invention) Thus, according to the method of the present invention, it is possible to easily carry in the vehicle body parts to the vehicle body assembly station and shorten the time required for positioning those vehicle body parts,
The tact time of the entire car body assembly line can be shortened, and since three shuttle bars are used, it is possible to easily install the lifting device at each work station. If it is attached to the side portion of the center floor main, the time required for positioning can be further shortened and the left and right body sides can be held more easily.

[Brief description of drawings]

1 (a) and 1 (b) are a plan view and a side view showing a vehicle body assembly line to which an embodiment of a method for carrying in vehicle body parts to a vehicle body assembly station of the present invention is applied, and FIG. 2 (a). , (B) and (c) are plan views, front views and side views of the work station St ₃ , showing the placement status of the left and right body sides C in the work station St ₃ of the above assembly line, and FIG. (B) is the above work station St ₃
FIG. 4 (a), (c), (e), (g), (i) and (the plan view and side view of the work station St ₃ showing the mounting situation of the air box D and the rear waist E in FIG. b), (d), (f), (h), and (j) are a plan view and a side view showing a specific example of the shuttle conveyor 21 that can be used in the assembly line, and FIG. 5 is a view of FIG. 4 (a). An enlarged plan view of the V portion, FIGS. 6 and 7 are VI-VI line and VII-VII line in FIG.
Sectional drawing which follows the line, FIG.8 (a) and (b) is VIII-VIII of FIG.4 (a).
A sectional view taken along the line and its plan view, FIG. 9 is a sectional view taken along the line IX-IX in FIG. 4 (e), and FIGS. 10 (a), (b) and (c) are shown in FIG. 4 (c). ) X
Partial enlarged plan view, its side view and front view, FIGS. 11 (a) and (b) are sectional views along the line XI-XI of FIG. 4 (g) and its plan view, and FIG. 12 is FIG. 13 is a side view as seen from the direction of arrow XII in FIG. 13, FIG. 13 is an enlarged side view of the portion XIII in FIG. 4 (h), and FIGS. 14 and 15 are XIV-XIV lines and XV-XV in FIG.
16 is a sectional view taken along line XVI-XVI of FIG. 4 and its side view, and FIGS. 17 (a), (b) and (c) are sectional views taken along line XVI-XVI of FIG. 16 is an enlarged plan view of the lifting device 94 shown in FIG. 16, a partial sectional front view and a partial side view, and FIGS. 18 (a) and 18 (b) are XVIII-XVI of FIG. 4 (a).
A cross-sectional view along the line II and its side view, FIGS. 19A and 19B are a cross-sectional view along the XIX-XIX line of FIG. 4A and its side view, and FIGS. FIG. 21B is a sectional view taken along line XX-XX in FIG. 4A and its side view, and FIGS. 21A and 21B are sectional views taken along line XXI-XXI in FIG. 4A. A side view thereof, FIGS. 22 (a) and 22 (b) are XXII-XXII in FIG. 4 (a).
A sectional view along the line and its side view, and FIGS. 23 (a) and 23 (b) are XXIII-XXI in FIG. 4 (c).
A sectional view along the line II and a side view thereof, FIGS. 24 (a) and 24 (b) are XXIV-XXIV in FIG. 4 (c).
FIG. 25 is a sectional view taken along the line and a side view thereof, and FIG. 25 is a plan view showing a conventional vehicle body assembly line. 21 …… Shuttle conveyor, 22,23 …… Shuttle bar 77 …… Body assembly device St ₅ …… Work station (body assembly station) A …… Floor main, C …… Body side

Claims (3)

[Claims] 1. When loading a floor main and left and right body sides to a vehicle body assembly station of a vehicle body assembly line, three shuttles that can reach the vehicle body assembly line from the same side of the vehicle body assembly station to the vehicle body assembly station. A shuttle conveyor having bars parallel to each other is laid, and the floor main is placed on the central shuttle bar of the three shuttle bars, while the left and right sides are arranged on the shuttle bars on both sides. The body sides are placed respectively, and then the three shuttle bars are simultaneously advanced based on the operation of the shuttle conveyor, and the floor main and the left and right body sides are placed in the car body assembly station from the same side of the car body assembly station. Cars that are carried in in a lump Loading method of body parts to the assembly station. 2. Another body part for connecting the floor main and the left and right body sides to each other is provided on at least one of the floor main and the left and right body sides mounted on the three shuttle bars. Then, the three shuttle bars are simultaneously moved forward so that the floor main, the left and right body sides and other body parts are placed in the body assembly station on the same side of the body assembly station. The method for carrying in vehicle body parts to the vehicle body assembly station according to claim 1, wherein the vehicle body parts are collectively carried in. 3. The left and right body sides mounted on the shuttle bars on both sides are held by side portions of a floor main mounted on the central shuttle bar.
A method for carrying in vehicle body parts to the vehicle body assembly station according to claim 1.