JPS6225546B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for assembling lower parts on an automobile assembly line.

More specifically, a planar loop-shaped auxiliary conveyor line that circulates in one direction is provided at a position that overlaps with a part of the main line that conveys automobile bodies in hangers, and on the auxiliary conveyor line, the bodies are conveyed. The rear suspension, fuel tank, exhaust pipe, silencer, exhaust gas purification device, which is assembled at the bottom,
A plurality of transport pallets with other parts collected and set at predetermined mounting positions are placed, and the pallets are raised by a lifting mechanism, etc., and synchronized with hangers that suspend and support the bodies being transported on the main line. Then, the lifting mechanism or the like is lowered to dock the pallet with the hanger, and then the parts set on the pallet are assembled to the lower part of the body, thereby efficiently assembling lower parts such as suspension parts. The present invention relates to an assembly method that can be easily performed, improve work efficiency, save labor, streamline assembly lines, etc.

On the automobile assembly line, the rear suspension including the braking device, fuel tank, exhaust pipe, exhaust purification device, buttful plate for compartment protection, and many other lower parts are placed under the floor of the body where each panel is joined by welding etc. It is necessary to assemble these types of parts, and the conventional method of assembling these types of parts is as follows.

In other words, the assembly line has stations for assembling the above-mentioned parts individually arranged along the line, and personnel assembling each part individually at each station from below the body transported by an overhead conveyor. The equipment is transported, temporarily set, and assembled. For this reason, first of all, each part is installed in a separate place and in an independent and separate operation, which is not the best in terms of work efficiency, and it takes a lot of time to transport each part to the body and temporarily set it. This requires a large number of workers for each station, and an extremely large number of workers as a whole.Therefore, it is desired to save labor and reduce labor. Next, assembly lines inevitably become long due to the need for a large number of assembly stations along the line, and the need for space between each station for the distribution of parts and other purposes. As the number of assembly lines increases, the structure of the assembly line becomes complicated and large, and improvements are desired in terms of space saving and effective use of space.

The inventors of the present invention have devised the present invention in view of the above-mentioned problems in assembling lower parts of automobiles, in order to effectively and rationally solve the problems.

An object of the present invention is to provide a planar loop-shaped auxiliary conveyor line that circulates in one direction at a position that overlaps a part of the main line that conveys automobile bodies on hangers, and on which the auxiliary conveyor line A plurality of transport pallets with the lower parts to be assembled assembled at the lower part of the body and set at predetermined mounting positions are placed, and the pallets are raised by a lifting mechanism, etc., and the bodies transported on the main line are suspended. An automobile assembly line in which the pallet is docked with the hanger by synchronizing with the supporting hanger, and then a lifting mechanism or the like is lowered to dock the pallet with the hanger, and then the parts set on the pallet are intensively assembled to the lower part of the body. The present invention provides a method for assembling a lower part.

Therefore, the present invention eliminates the need to assemble parts over time at individual stations on the line, and assembles parts intensively and compositely at one station using a consolidated pallet. , The assembly can be performed efficiently and efficiently, and the labor of the worker can be reduced, greatly improving the work efficiency. The parts set on the conveying pallet can be set as they are to be assembled on the underside of the body. The parts can be assembled by tightening bolts, etc., making it easy to work, and even unskilled workers can easily and reliably assemble the parts.The line is dotted with assembly stations for each part. Since this is not necessary, the line structure can be simplified, the line length can be shortened, space can be used effectively and rationally, and it has the advantage of being adaptable to the current production line.

Next, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a schematic plan view of a part of an automobile assembly line. The main line 1 is composed of, for example, an overhead conveyor 2, and a hanger 3 suspends and supports an automobile body 4 in a normal position from a station in front. It is transported to the next station as shown by the arrow. An area A serving as a lower part assembly station is provided in a part of this line 1, and an area B for preparing, transporting, and assembling lower parts by a planar loop-shaped auxiliary conveyor line 5 is provided in this area A, and part of area B The area overlaps with a part of area A. The body 4 is conveyed along the main line 1 from the front area C, through the area A, to the next area D by the conveyor 2.

The auxiliary conveyor line 5 sequentially circulates in one direction and conveys as shown by the arrow, merges with the main line 1, branches at the downstream part of the main line 1, and connects between the merging point a and the branching point b. A plurality of lower parts assembly areas are provided in an area c that is distinct from and parallel to the main line, and includes, from upstream, a radiator set area d, an exhaust system set area e for exhaust pipes, mufflers, exhaust purification devices, etc. A next fuel tank setting area f, a buffer plate setting area g for each component section in the previous setting process, and further downstream thereof a rear suspension assembly setting area h including a braking device are provided.

A rectangular frame 7 is placed on the auxiliary conveyor line 5.
A transport pallet 6 consisting of a cross bar 8, etc. is disposed, and is circulated on a line 5 by a trolley 9.
As shown in FIG. 5, by passing through each area d to h, the pallet 6 is filled with exhaust pipes,
An exhaust system 10 such as a muffler and an exhaust purification system, a fuel tank 11, and a buffer plate 12 are installed at the rear, left and right rear suspension units 13, 13 are installed at the rear, and a radiator unit 15, etc. is installed at the front via a bracket 14. Temporary assembly and temporary setting are performed in sequence. Each part is temporarily attached to the pallet 6 in advance so that each part can be accurately set at the specified mounting location on the body by synchronizing the pallet with the body in relation to the underfloor of the body 4 and the outside of the rear wheel house. The pallet is also constructed to match the body, and each part is temporarily set on the pallet 6 by locking or other appropriate means, and FIG. , palette 6
16 provided on the side of the frame are claws that dock with the conveyor 2 forming the main line 1.

Parts 10 to 13, 15 are temporarily set on a pallet 6 at each station d to h of the auxiliary line 5, and the temporarily set pallet 6 is conveyed from the confluence point a through the lower part of the main line 1 to the docking area F. At this point, the pallet 6 is raised together with, for example, the cart 9 by a lifting device 17 that can be raised and lowered, facing the underside of the body 4 that has been transported, and is attached to the hanger 3 with claws 16 etc., that is, the parts are removed. The assembled pallets 6 are set at a predetermined position on the lower surface of the body 4. The lifting operation for setting the pallet 6 onto the body 4 is shown in FIG.

Thereafter, the cart 9 is taken out from the pallet 6 by the downward movement of the lift device 17, and the pallet 6 is held on the lower surface of the body 4 by the claws 18 on the left and right sides of the lower part of the hanger 3, as shown in FIG. The workers gather together and assemble each part set on the pallet 6 to the underside of the body one by one by tightening bolts, etc. After assembling, open the claw 18 of the hanger 3 at a predetermined position and release the engagement with the claw 16. do. At this position, a lift device similar to that shown in Fig. 2 is placed facing the empty pallet, the empty pallet is received by the cart on the lift device, the pallet discharged from the hanger 3 is returned to the auxiliary conveyor line 5, and the pallet is branched out. The parts are set again in each temporary setting area d to h from the point, and the above process is repeated.

In the above embodiment, even the radiator was temporarily set on the integrated pallet and assembled together with other underfloor parts and suspension parts, but this may be assembled together with the engine in a separate process.

As is clear from the above, according to the present invention, the lower parts are centrally set on the transport pallet, and the parts are assembled centrally in one place, so first of all, work efficiency is greatly improved compared to the conventional method. In addition to making it possible to assemble the lower parts efficiently, since there are no multiple assembly stations for each part scattered along the main line, the space in the longitudinal direction of the main line is also reduced, making it possible to shorten the line length. , and the line configuration is simplified, which is extremely advantageous in terms of space and line configuration, and the line can be rationalized and simplified. In addition, since each part is temporarily set on a pallet, it is possible to achieve accuracy in centering and positioning by matching it with the body, and it is possible to assemble each part immediately. It does not require a lot of effort to transport the parts to each station and temporarily set them, and the assembly work can be done intensively and easily, which simplifies the work.
In addition, setting the parts onto the pallet is much easier than directly assembling the individual parts onto the body from below, making it easy to assemble even for unskilled workers or for a small number of people. It can be easily carried out by personnel, and assembly to the body can be done extremely easily by simply tightening bolts on parts supported by pallets, dramatically improving work efficiency compared to the past, and improving automobile It saves labor, saves labor, and simplifies work on the assembly line, which is extremely beneficial for mass production of automobiles.
This has many advantages, such as contributing to improved assembly quality.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; Fig. 1 is a schematic plan view of the line, Fig. 2 is a side view of the work of matching the pallet and body, and Fig. 3 shows the lower part can be assembled. FIG. 4 is a front view of FIG. 3, and FIG. 5 is a perspective view of the pallet and body in synchronization. In the drawing, 4 is the body, 6 is the pallet, and 11 to 1
3 and 15 are parts.

Claims (1)

[Claims] 1. A method of synchronizing the parts to be assembled with the transported automobile body, bringing them into alignment with the body using a lifting mechanism, and assembling the parts to the lower part of the body, the method comprising: transporting the automobile body with a hanger. A planar loop-shaped auxiliary conveyor line that circulates in one direction is provided at a position where it overlaps with a part of the main line, and on the auxiliary conveyor line are the rear suspension, fuel tank,
A plurality of conveyor pallets with exhaust pipes, mufflers, exhaust gas purifiers, and other lower parts assembled and set at predetermined mounting positions are placed on the pallets, and the pallets are lifted by an elevating mechanism and conveyed on the main line. The body is synchronized with the hanger that suspends and supports the body, and then the lifting mechanism is lowered to dock the pallet with the hanger, and then the parts set on the pallet are assembled to the lower part of the body. Features: A method for assembling lower parts on an automobile assembly line.