JPS63137080A - Automobile body assembling device - Google Patents

Abstract

PURPOSE:To improve the operation rate of equipment by providing a turn table midway on a main rail, radially providing plural assembling jigs around said table, and switching over the traveling route of a bogie to said assembling jigs by said turn table. CONSTITUTION:A bogie 3 on which, e.g., a floor panel is set in the previous process travels on main rails 2 and, after tacking plural body parts in a parts setting stage S1, it travels to a turn table 10. In this case, when the automobile type of a body W is an A type, the turn table 10 is rotated and the bogie 3 is advanced into an exclusive A-type body main jig 15A through sub-rails 12 and positioned to carry out spot welding. When the operation is over, the bogie is sent to the following process through the sub-rail 12, turn table 10, main rails 2, and an idle stage S3. Thereby, when carrying out parallel productions of, e.g., two or more automobile types, even when the remodeling, etc. of a specific assembling jig occurs, the production can be continued using the remaining assembling jigs, minimizing the reduction in the operation rate of equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an apparatus for assembling an automobile body, which is constructed mainly of a self-propelled trolley-type conveying apparatus.

Conventional technology A car body assembly apparatus using a self-propelled cart type conveyance device is disclosed in Japanese Patent Application No. 155075/1983 (Japanese Patent Application No. 59/1983).
No. 77428). The vehicle body assembly device disclosed in the publication includes a plurality of assembly stages that perform assembly work on vehicle body parts on the trolley along a conveyor device consisting of a rail and a self-propelled unsupported vehicle that runs on the rail. are arranged in series.

According to this assembly device, for a specific work content, for example, if the assembly stage for eight cars and the assembly stage for B cars are placed adjacent to each other, and the carts are stopped only at the required stage, the line itself can be is one power (ra 2
It is not possible to simultaneously produce more car bodies than car models.

Problems to be Solved by the Invention Although the above-mentioned car body assembly apparatus is configured to allow parallel production, it has a structure in which stages necessary for each car model are arranged in series, so for example When modifying or replacing the jig of a specific stage when changing the model of the MS, or when performing a production trial, the modification work must be carried out within the existing line. Therefore, when carrying out modification work, it is necessary to either stop the entire line currently in production of the car, assuming that it will disrupt production, or to use the time when the line is stopped, such as on holidays. In either case, equipment operating rates will be reduced and time constraints will be imposed.

Means for Solving the Problems The present invention is intended to enable the construction and production trial production of jigs for a specific stage without affecting the existing line.

Specifically, as shown in the examples, an assembly device is constructed around a transport device consisting of a main rail and a self-propelled trolley that runs on the main rail with predetermined vehicle body parts mounted thereon. A turntable for changing the traveling direction of the self-propelled bogie is arranged in the middle of the main rail, and a plurality of assembly jigs for assembling the vehicle body parts are arranged radially around the turntable, A plurality of assembly jigs and a turntable are connected to each other by sub-rails.

Assuming that a total of three assembly jigs for cars B, B, and C are arranged radially around the working turntable,
For example, when it becomes necessary to modify and produce a prototype assembly jig for the 8th Army, if only the assembly jig for car B is stopped, at least the A and C cars can be modified.
Production can be continued using assembly jigs for cars and C cars.

Embodiment FIG. 1 is an explanatory plan view showing one embodiment of the present invention, and illustrates an apparatus for assembling a main body, which is the frame of an automobile.

Reference numeral 2 denotes a main rail that constitutes a so-called self-propelled cart type transport device t together with a cart to be described later.
A self-propelled trolley 3, shown above in FIGS. 2 and 3, carries basic vehicle body parts and travels 4 degrees. A skid 6 is mounted on the truck 3 via positioning guides 4 and 5, and a ψ-shift for positioning vehicle body parts is attached to the skid 6. In addition, the trolley 3 has a built-in drive mechanism 9 mainly composed of an electric motor 8, and the main rail 2
It is self-propelled by receiving electrical energy from a power supply truck (not shown) attached to the vehicle.

On the main rail 2 are a plurality of stages Sl.

S2. While S3 is set, a turntable IO is installed in the part corresponding to stage S2 by cutting out a part of the main rail 2, and the movable rail IK is fixed to the turntable IO. . In the case of this example, if stage St is a parts setting stage and stage S3 is an idle stage, then in stage St, necessary body main parts such as body sides, air box, rear panel, etc. are set for the base floor panel. It is set and temporarily fixed.

Around the turntable 10, there are a plurality of sub-rails (three in this embodiment) extending radially around the turntable 10! 2, 13.14 are provided, and body main jigs 15A, 15I3, 15C, for example, are installed as assembly jigs at the ends of each sub-rail 12, 13.14. In other words, the turntable IO and each body main jig 15A, 15F3, 15C are connected to each other by sub-rails 12, 13.14, which have the same structure as the main rail 2.
By rotating the turntable IO while stopping on the movable rail li of 0, the trolley 3 can be moved from the turntable 10 toward each of the body main jigs 15A, 15I3, and 15C.

+5 among body main jigs 15A, 15B, 15C
A! ! For example, each body main jig 15A is specialized for each vehicle type, such as car A, 1511 for car B, and 15C for car C.

15B and 15C have the function of mutually positioning and clamping the body main parts that have been temporarily fixed together as described above, and then performing spot welding.

More specifically, as shown in FIGS. 2 and 3, each body main jig 15A, 15B, 15G is equipped with a plurality of fixtures 1G for positioning and clamping body main parts to each other and performing spot welding. In addition to that, there is also a pedestal 1
7 and a lifter I8 are provided. The lifter I8 is made into a lifter plate 19 by cutting out a part of the sub-rail 12, and this lifter plate 19 is connected to the cylinder 20.
It is designed to be raised and lowered. In other words, when the trolley 3 runs on the sub-rails 12, 13, 14, a predetermined gap is secured between the skid 6 and the pedestal 17, while the 'body main jig 15A, 15
When the lifter plate 19 is lowered by a predetermined distance after waiting for the truck 3 to stop within 1.15C, the skid 6 is separated from the truck 3 and positioned and supported by the pedestal 17.

Next, the operation of the assembly apparatus configured as described above will be explained.

In FIG. 1, a cart 3 on which a floor panel has been set as a vehicle body part in the previous process runs on the main rail 2 to a parts setting stage S1 and stops. At the parts setting stage Sl, a plurality of body main parts, such as a body side, an air box, a rear panel, etc., are set and temporarily fixed using the floor panel previously mounted on the trolley 3 as a base. Then, the trolley 3 on which the predetermined body main parts are set travels to the turntable 10 and stops at 1-
Zuro.

Here, the car type of the car body W (a car body in which the main body parts are assembled with the floor panel as C1 body) as a car body part transported on the main rail 2 by the bogie 3 is managed by a production control device not shown. , for example, if the car body W h < A vehicle mounted on the bogie 3 stopped on the turntable 10, the turntable 10 rotates until the movable rail 11 coincides with the sub-rail 12, and the bogie 3 moves on the sub-rail 12 until A. Car body main jig 1
Enter 5A.

When the lifter 18 is activated after waiting for the truck 3 to stop within the body main jig 15A, the skid 6, which was previously supported by the truck 3, is supported by the pedestal 17 and positioned, as described above. Then, the floor panel and each main body part are positioned and clamped using the fixture 16 as a reference, and then spot welding is performed.

When the work in the body main jig 15A is completed, the skid 6 is again mounted on the truck 3 by the lifting operation of the lifter 18, and the truck 3 travels to the turntable IO. Then, after waiting for the turntable 10 to rotate until the movable rail 11 and the main rail 2 coincide with each other, the cart 3 runs on the main rail 2 again and heads to the next process via the idle stage S3.

In addition, in the case of car B, the assembly work is performed in the main body jig 15B, and in the case of car C, the assembly work is performed in the main body jig 15C, and other operations are basically the same as above. It is.

Furthermore, although the above embodiments have been explained using a body main assembly apparatus as an example, the present invention can be similarly applied to floor main assembly or engine compartment assembly.

Effects of the Invention According to the present invention, a turntable is arranged in the middle of a main rail, and a plurality of assembly jigs are arranged radially around the turntable, and a trolley travel system from the main rail to each assembly jig is realized. Since the path switching is done using a turntable, for example, when a specific assembly jig is modified when two or more car models are being produced in parallel, only the relevant jig can be stopped and the remaining Production of assembly jigs can be continued, and reductions in equipment operating rates and time constraints can be kept to a minimum.

[Brief explanation of the drawing]

Fig. 1 is an explanatory plan view showing one embodiment of the present invention, Fig. 2 is a side view showing details of the truck and the main body jig, and Fig. 3 is a side view showing details of the truck and the main body jig.
The figure is a right side view of FIG. 2. 1...Transport device, 2...Main rail, 3...Dolly, lO...Turntable! 1... Movable rail, 12.13.14... Sub rail, 15A, 15B
. 15c...Body main jig as an assembly jig, W.
...Car body (car body parts). 2 people outside

Claims (1)

[Claims] (1) In an assembly device that is mainly configured with a transport device consisting of a main rail and a self-propelled trolley that runs on the main rail with predetermined car body parts mounted thereon, a self-propelled trolley is mounted on the main rail. A turntable is arranged to change the traveling direction of the bogie, and a plurality of assembly jigs for assembling the car body parts are arranged radially around the turntable. An automobile body assembly device characterized in that the two are connected by a sub-rail.